LCOV - code coverage report
Current view: top level - debuginfod - debuginfod.cxx (source / functions) Hit Total Coverage
Test: elfutils-0.189 Lines: 1888 2238 84.4 %
Date: 2023-10-14 15:37:49 Functions: 88 97 90.7 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 2488 5776 43.1 %

           Branch data     Line data    Source code
       1                 :            : /* Debuginfo-over-http server.
       2                 :            :    Copyright (C) 2019-2021 Red Hat, Inc.
       3                 :            :    Copyright (C) 2021, 2022 Mark J. Wielaard <mark@klomp.org>
       4                 :            :    This file is part of elfutils.
       5                 :            : 
       6                 :            :    This file is free software; you can redistribute it and/or modify
       7                 :            :    it under the terms of the GNU General Public License as published by
       8                 :            :    the Free Software Foundation; either version 3 of the License, or
       9                 :            :    (at your option) any later version.
      10                 :            : 
      11                 :            :    elfutils is distributed in the hope that it will be useful, but
      12                 :            :    WITHOUT ANY WARRANTY; without even the implied warranty of
      13                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14                 :            :    GNU General Public License for more details.
      15                 :            : 
      16                 :            :    You should have received a copy of the GNU General Public License
      17                 :            :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      18                 :            : 
      19                 :            : 
      20                 :            : /* cargo-cult from libdwfl linux-kernel-modules.c */
      21                 :            : /* In case we have a bad fts we include this before config.h because it
      22                 :            :    can't handle _FILE_OFFSET_BITS.
      23                 :            :    Everything we need here is fine if its declarations just come first.
      24                 :            :    Also, include sys/types.h before fts. On some systems fts.h is not self
      25                 :            :    contained. */
      26                 :            : #ifdef BAD_FTS
      27                 :            :   #include <sys/types.h>
      28                 :            :   #include <fts.h>
      29                 :            : #endif
      30                 :            : 
      31                 :            : #ifdef HAVE_CONFIG_H
      32                 :            :   #include "config.h"
      33                 :            : #endif
      34                 :            : 
      35                 :            : // #define _GNU_SOURCE
      36                 :            : #ifdef HAVE_SCHED_H
      37                 :            : extern "C" {
      38                 :            : #include <sched.h>
      39                 :            : }
      40                 :            : #endif
      41                 :            : #ifdef HAVE_SYS_RESOURCE_H
      42                 :            : extern "C" {
      43                 :            : #include <sys/resource.h>
      44                 :            : }
      45                 :            : #endif
      46                 :            : 
      47                 :            : #ifdef HAVE_EXECINFO_H
      48                 :            : extern "C" {
      49                 :            : #include <execinfo.h>
      50                 :            : }
      51                 :            : #endif
      52                 :            : 
      53                 :            : extern "C" {
      54                 :            : #include "printversion.h"
      55                 :            : #include "system.h"
      56                 :            : }
      57                 :            : 
      58                 :            : #include "debuginfod.h"
      59                 :            : #include <dwarf.h>
      60                 :            : 
      61                 :            : #include <argp.h>
      62                 :            : #ifdef __GNUC__
      63                 :            : #undef __attribute__ /* glibc bug - rhbz 1763325 */
      64                 :            : #endif
      65                 :            : 
      66                 :            : #include <unistd.h>
      67                 :            : #include <stdlib.h>
      68                 :            : #include <locale.h>
      69                 :            : #include <pthread.h>
      70                 :            : #include <signal.h>
      71                 :            : #include <sys/stat.h>
      72                 :            : #include <sys/time.h>
      73                 :            : #include <sys/vfs.h>
      74                 :            : #include <unistd.h>
      75                 :            : #include <fcntl.h>
      76                 :            : #include <netdb.h>
      77                 :            : 
      78                 :            : 
      79                 :            : /* If fts.h is included before config.h, its indirect inclusions may not
      80                 :            :    give us the right LFS aliases of these functions, so map them manually.  */
      81                 :            : #ifdef BAD_FTS
      82                 :            :   #ifdef _FILE_OFFSET_BITS
      83                 :            :     #define open open64
      84                 :            :     #define fopen fopen64
      85                 :            :   #endif
      86                 :            : #else
      87                 :            :   #include <sys/types.h>
      88                 :            :   #include <fts.h>
      89                 :            : #endif
      90                 :            : 
      91                 :            : #include <cstring>
      92                 :            : #include <vector>
      93                 :            : #include <set>
      94                 :            : #include <unordered_set>
      95                 :            : #include <map>
      96                 :            : #include <string>
      97                 :            : #include <iostream>
      98                 :            : #include <iomanip>
      99                 :            : #include <ostream>
     100                 :            : #include <sstream>
     101                 :            : #include <mutex>
     102                 :            : #include <deque>
     103                 :            : #include <condition_variable>
     104                 :            : #include <exception>
     105                 :            : #include <thread>
     106                 :            : // #include <regex> // on rhel7 gcc 4.8, not competent
     107                 :            : #include <regex.h>
     108                 :            : // #include <algorithm>
     109                 :            : using namespace std;
     110                 :            : 
     111                 :            : #include <gelf.h>
     112                 :            : #include <libdwelf.h>
     113                 :            : 
     114                 :            : #include <microhttpd.h>
     115                 :            : 
     116                 :            : #if MHD_VERSION >= 0x00097002
     117                 :            : // libmicrohttpd 0.9.71 broke API
     118                 :            : #define MHD_RESULT enum MHD_Result
     119                 :            : #else
     120                 :            : #define MHD_RESULT int
     121                 :            : #endif
     122                 :            : 
     123                 :            : #include <curl/curl.h>
     124                 :            : #include <archive.h>
     125                 :            : #include <archive_entry.h>
     126                 :            : #include <sqlite3.h>
     127                 :            : 
     128                 :            : #ifdef __linux__
     129                 :            : #include <sys/syscall.h>
     130                 :            : #endif
     131                 :            : 
     132                 :            : #ifdef __linux__
     133                 :            : #define tid() syscall(SYS_gettid)
     134                 :            : #else
     135                 :            : #define tid() pthread_self()
     136                 :            : #endif
     137                 :            : 
     138                 :            : 
     139                 :            : inline bool
     140                 :       3030 : string_endswith(const string& haystack, const string& needle)
     141                 :            : {
     142         [ +  # ]:       3030 :   return (haystack.size() >= needle.size() &&
     143                 :       3033 :           equal(haystack.end()-needle.size(), haystack.end(),
     144                 :       3030 :                 needle.begin()));
     145                 :            : }
     146                 :            : 
     147                 :            : 
     148                 :            : // Roll this identifier for every sqlite schema incompatibility.
     149                 :            : #define BUILDIDS "buildids10"
     150                 :            : 
     151                 :            : #if SQLITE_VERSION_NUMBER >= 3008000
     152                 :            : #define WITHOUT_ROWID "without rowid"
     153                 :            : #else
     154                 :            : #define WITHOUT_ROWID ""
     155                 :            : #endif
     156                 :            : 
     157                 :            : static const char DEBUGINFOD_SQLITE_DDL[] =
     158                 :            :   "pragma foreign_keys = on;\n"
     159                 :            :   "pragma synchronous = 0;\n" // disable fsync()s - this cache is disposable across a machine crash
     160                 :            :   "pragma journal_mode = wal;\n" // https://sqlite.org/wal.html
     161                 :            :   "pragma wal_checkpoint = truncate;\n" // clean out any preexisting wal file
     162                 :            :   "pragma journal_size_limit = 0;\n" // limit steady state file (between grooming, which also =truncate's)
     163                 :            :   "pragma auto_vacuum = incremental;\n" // https://sqlite.org/pragma.html
     164                 :            :   "pragma busy_timeout = 1000;\n" // https://sqlite.org/pragma.html
     165                 :            :   // NB: all these are overridable with -D option
     166                 :            : 
     167                 :            :   // Normalization table for interning file names
     168                 :            :   "create table if not exists " BUILDIDS "_fileparts (\n"
     169                 :            :   "        id integer primary key not null,\n"
     170                 :            :   "        name text unique not null\n"
     171                 :            :   "        );\n"
     172                 :            :   "create table if not exists " BUILDIDS "_files (\n"
     173                 :            :   "        id integer primary key not null,\n"
     174                 :            :   "        dirname integer not null,\n"
     175                 :            :   "        basename integer not null,\n"
     176                 :            :   "        unique (dirname, basename),\n"
     177                 :            :   "        foreign key (dirname) references " BUILDIDS "_fileparts(id) on delete cascade,\n"
     178                 :            :   "        foreign key (basename) references " BUILDIDS "_fileparts(id) on delete cascade\n"
     179                 :            :   "        );\n"
     180                 :            :   "create view if not exists " BUILDIDS "_files_v as\n" // a 
     181                 :            :   "        select f.id, n1.name || '/' || n2.name as name\n"
     182                 :            :   "        from " BUILDIDS "_files f, " BUILDIDS "_fileparts n1, " BUILDIDS "_fileparts n2\n"
     183                 :            :   "        where f.dirname = n1.id and f.basename = n2.id;\n"
     184                 :            :   
     185                 :            :   // Normalization table for interning buildids
     186                 :            :   "create table if not exists " BUILDIDS "_buildids (\n"
     187                 :            :   "        id integer primary key not null,\n"
     188                 :            :   "        hex text unique not null);\n"
     189                 :            :   // Track the completion of scanning of a given file & sourcetype at given time
     190                 :            :   "create table if not exists " BUILDIDS "_file_mtime_scanned (\n"
     191                 :            :   "        mtime integer not null,\n"
     192                 :            :   "        file integer not null,\n"
     193                 :            :   "        size integer not null,\n" // in bytes
     194                 :            :   "        sourcetype text(1) not null\n"
     195                 :            :   "            check (sourcetype IN ('F', 'R')),\n"
     196                 :            :   "        foreign key (file) references " BUILDIDS "_files(id) on update cascade on delete cascade,\n"
     197                 :            :   "        primary key (file, mtime, sourcetype)\n"
     198                 :            :   "        ) " WITHOUT_ROWID ";\n"
     199                 :            :   "create table if not exists " BUILDIDS "_f_de (\n"
     200                 :            :   "        buildid integer not null,\n"
     201                 :            :   "        debuginfo_p integer not null,\n"
     202                 :            :   "        executable_p integer not null,\n"
     203                 :            :   "        file integer not null,\n"
     204                 :            :   "        mtime integer not null,\n"
     205                 :            :   "        foreign key (file) references " BUILDIDS "_files(id) on update cascade on delete cascade,\n"
     206                 :            :   "        foreign key (buildid) references " BUILDIDS "_buildids(id) on update cascade on delete cascade,\n"
     207                 :            :   "        primary key (buildid, file, mtime)\n"
     208                 :            :   "        ) " WITHOUT_ROWID ";\n"
     209                 :            :   // Index for faster delete by file identifier
     210                 :            :   "create index if not exists " BUILDIDS "_f_de_idx on " BUILDIDS "_f_de (file, mtime);\n"
     211                 :            :   "create table if not exists " BUILDIDS "_f_s (\n"
     212                 :            :   "        buildid integer not null,\n"
     213                 :            :   "        artifactsrc integer not null,\n"
     214                 :            :   "        file integer not null,\n" // NB: not necessarily entered into _mtime_scanned
     215                 :            :   "        mtime integer not null,\n"
     216                 :            :   "        foreign key (file) references " BUILDIDS "_files(id) on update cascade on delete cascade,\n"
     217                 :            :   "        foreign key (artifactsrc) references " BUILDIDS "_files(id) on update cascade on delete cascade,\n"
     218                 :            :   "        foreign key (buildid) references " BUILDIDS "_buildids(id) on update cascade on delete cascade,\n"
     219                 :            :   "        primary key (buildid, artifactsrc, file, mtime)\n"
     220                 :            :   "        ) " WITHOUT_ROWID ";\n"
     221                 :            :   "create table if not exists " BUILDIDS "_r_de (\n"
     222                 :            :   "        buildid integer not null,\n"
     223                 :            :   "        debuginfo_p integer not null,\n"
     224                 :            :   "        executable_p integer not null,\n"
     225                 :            :   "        file integer not null,\n"
     226                 :            :   "        mtime integer not null,\n"
     227                 :            :   "        content integer not null,\n"
     228                 :            :   "        foreign key (file) references " BUILDIDS "_files(id) on update cascade on delete cascade,\n"
     229                 :            :   "        foreign key (content) references " BUILDIDS "_files(id) on update cascade on delete cascade,\n"
     230                 :            :   "        foreign key (buildid) references " BUILDIDS "_buildids(id) on update cascade on delete cascade,\n"
     231                 :            :   "        primary key (buildid, debuginfo_p, executable_p, file, content, mtime)\n"
     232                 :            :   "        ) " WITHOUT_ROWID ";\n"
     233                 :            :   // Index for faster delete by archive file identifier
     234                 :            :   "create index if not exists " BUILDIDS "_r_de_idx on " BUILDIDS "_r_de (file, mtime);\n"
     235                 :            :   "create table if not exists " BUILDIDS "_r_sref (\n" // outgoing dwarf sourcefile references from rpm
     236                 :            :   "        buildid integer not null,\n"
     237                 :            :   "        artifactsrc integer not null,\n"
     238                 :            :   "        foreign key (artifactsrc) references " BUILDIDS "_files(id) on update cascade on delete cascade,\n"
     239                 :            :   "        foreign key (buildid) references " BUILDIDS "_buildids(id) on update cascade on delete cascade,\n"
     240                 :            :   "        primary key (buildid, artifactsrc)\n"
     241                 :            :   "        ) " WITHOUT_ROWID ";\n"
     242                 :            :   "create table if not exists " BUILDIDS "_r_sdef (\n" // rpm contents that may satisfy sref
     243                 :            :   "        file integer not null,\n"
     244                 :            :   "        mtime integer not null,\n"
     245                 :            :   "        content integer not null,\n"
     246                 :            :   "        foreign key (file) references " BUILDIDS "_files(id) on update cascade on delete cascade,\n"
     247                 :            :   "        foreign key (content) references " BUILDIDS "_files(id) on update cascade on delete cascade,\n"
     248                 :            :   "        primary key (content, file, mtime)\n"
     249                 :            :   "        ) " WITHOUT_ROWID ";\n"
     250                 :            :   // create views to glue together some of the above tables, for webapi D queries
     251                 :            :   "create view if not exists " BUILDIDS "_query_d as \n"
     252                 :            :   "select\n"
     253                 :            :   "        b.hex as buildid, n.mtime, 'F' as sourcetype, f0.name as source0, n.mtime as mtime, null as source1\n"
     254                 :            :   "        from " BUILDIDS "_buildids b, " BUILDIDS "_files_v f0, " BUILDIDS "_f_de n\n"
     255                 :            :   "        where b.id = n.buildid and f0.id = n.file and n.debuginfo_p = 1\n"
     256                 :            :   "union all select\n"
     257                 :            :   "        b.hex as buildid, n.mtime, 'R' as sourcetype, f0.name as source0, n.mtime as mtime, f1.name as source1\n"
     258                 :            :   "        from " BUILDIDS "_buildids b, " BUILDIDS "_files_v f0, " BUILDIDS "_files_v f1, " BUILDIDS "_r_de n\n"
     259                 :            :   "        where b.id = n.buildid and f0.id = n.file and f1.id = n.content and n.debuginfo_p = 1\n"
     260                 :            :   ";"
     261                 :            :   // ... and for E queries
     262                 :            :   "create view if not exists " BUILDIDS "_query_e as \n"
     263                 :            :   "select\n"
     264                 :            :   "        b.hex as buildid, n.mtime, 'F' as sourcetype, f0.name as source0, n.mtime as mtime, null as source1\n"
     265                 :            :   "        from " BUILDIDS "_buildids b, " BUILDIDS "_files_v f0, " BUILDIDS "_f_de n\n"
     266                 :            :   "        where b.id = n.buildid and f0.id = n.file and n.executable_p = 1\n"
     267                 :            :   "union all select\n"
     268                 :            :   "        b.hex as buildid, n.mtime, 'R' as sourcetype, f0.name as source0, n.mtime as mtime, f1.name as source1\n"
     269                 :            :   "        from " BUILDIDS "_buildids b, " BUILDIDS "_files_v f0, " BUILDIDS "_files_v f1, " BUILDIDS "_r_de n\n"
     270                 :            :   "        where b.id = n.buildid and f0.id = n.file and f1.id = n.content and n.executable_p = 1\n"
     271                 :            :   ";"
     272                 :            :   // ... and for S queries
     273                 :            :   "create view if not exists " BUILDIDS "_query_s as \n"
     274                 :            :   "select\n"
     275                 :            :   "        b.hex as buildid, fs.name as artifactsrc, 'F' as sourcetype, f0.name as source0, n.mtime as mtime, null as source1, null as source0ref\n"
     276                 :            :   "        from " BUILDIDS "_buildids b, " BUILDIDS "_files_v f0, " BUILDIDS "_files_v fs, " BUILDIDS "_f_s n\n"
     277                 :            :   "        where b.id = n.buildid and f0.id = n.file and fs.id = n.artifactsrc\n"
     278                 :            :   "union all select\n"
     279                 :            :   "        b.hex as buildid, f1.name as artifactsrc, 'R' as sourcetype, f0.name as source0, sd.mtime as mtime, f1.name as source1, fsref.name as source0ref\n"
     280                 :            :   "        from " BUILDIDS "_buildids b, " BUILDIDS "_files_v f0, " BUILDIDS "_files_v f1, " BUILDIDS "_files_v fsref, "
     281                 :            :   "        " BUILDIDS "_r_sdef sd, " BUILDIDS "_r_sref sr, " BUILDIDS "_r_de sde\n"
     282                 :            :   "        where b.id = sr.buildid and f0.id = sd.file and fsref.id = sde.file and f1.id = sd.content\n"
     283                 :            :   "        and sr.artifactsrc = sd.content and sde.buildid = sr.buildid\n"
     284                 :            :   ";"
     285                 :            :   // and for startup overview counts
     286                 :            :   "drop view if exists " BUILDIDS "_stats;\n"
     287                 :            :   "create view if not exists " BUILDIDS "_stats as\n"
     288                 :            :   "          select 'file d/e' as label,count(*) as quantity from " BUILDIDS "_f_de\n"
     289                 :            :   "union all select 'file s',count(*) from " BUILDIDS "_f_s\n"
     290                 :            :   "union all select 'archive d/e',count(*) from " BUILDIDS "_r_de\n"
     291                 :            :   "union all select 'archive sref',count(*) from " BUILDIDS "_r_sref\n"
     292                 :            :   "union all select 'archive sdef',count(*) from " BUILDIDS "_r_sdef\n"
     293                 :            :   "union all select 'buildids',count(*) from " BUILDIDS "_buildids\n"
     294                 :            :   "union all select 'filenames',count(*) from " BUILDIDS "_files\n"
     295                 :            :   "union all select 'fileparts',count(*) from " BUILDIDS "_fileparts\n"  
     296                 :            :   "union all select 'files scanned (#)',count(*) from " BUILDIDS "_file_mtime_scanned\n"
     297                 :            :   "union all select 'files scanned (mb)',coalesce(sum(size)/1024/1024,0) from " BUILDIDS "_file_mtime_scanned\n"
     298                 :            : #if SQLITE_VERSION_NUMBER >= 3016000
     299                 :            :   "union all select 'index db size (mb)',page_count*page_size/1024/1024 as size FROM pragma_page_count(), pragma_page_size()\n"
     300                 :            : #endif
     301                 :            :   ";\n"
     302                 :            : 
     303                 :            : // schema change history & garbage collection
     304                 :            : //
     305                 :            : // XXX: we could have migration queries here to bring prior-schema
     306                 :            : // data over instead of just dropping it.  But that could incur
     307                 :            : // doubled storage costs.
     308                 :            : //
     309                 :            : // buildids10: split the _files table into _parts
     310                 :            :   "" // <<< we are here
     311                 :            : // buildids9: widen the mtime_scanned table
     312                 :            :   "DROP VIEW IF EXISTS buildids9_stats;\n"
     313                 :            :   "DROP INDEX IF EXISTS buildids9_r_de_idx;\n"
     314                 :            :   "DROP INDEX IF EXISTS buildids9_f_de_idx;\n"
     315                 :            :   "DROP VIEW IF EXISTS buildids9_query_s;\n"
     316                 :            :   "DROP VIEW IF EXISTS buildids9_query_e;\n"
     317                 :            :   "DROP VIEW IF EXISTS buildids9_query_d;\n"
     318                 :            :   "DROP TABLE IF EXISTS buildids9_r_sdef;\n"
     319                 :            :   "DROP TABLE IF EXISTS buildids9_r_sref;\n"
     320                 :            :   "DROP TABLE IF EXISTS buildids9_r_de;\n"
     321                 :            :   "DROP TABLE IF EXISTS buildids9_f_s;\n"
     322                 :            :   "DROP TABLE IF EXISTS buildids9_f_de;\n"
     323                 :            :   "DROP TABLE IF EXISTS buildids9_file_mtime_scanned;\n"
     324                 :            :   "DROP TABLE IF EXISTS buildids9_buildids;\n"
     325                 :            :   "DROP TABLE IF EXISTS buildids9_files;\n"
     326                 :            : // buildids8: slim the sref table
     327                 :            :   "drop table if exists buildids8_f_de;\n"
     328                 :            :   "drop table if exists buildids8_f_s;\n"
     329                 :            :   "drop table if exists buildids8_r_de;\n"
     330                 :            :   "drop table if exists buildids8_r_sref;\n"
     331                 :            :   "drop table if exists buildids8_r_sdef;\n"
     332                 :            :   "drop table if exists buildids8_file_mtime_scanned;\n"
     333                 :            :   "drop table if exists buildids8_files;\n"
     334                 :            :   "drop table if exists buildids8_buildids;\n"
     335                 :            : // buildids7: separate _norm table into dense subtype tables
     336                 :            :   "drop table if exists buildids7_f_de;\n"
     337                 :            :   "drop table if exists buildids7_f_s;\n"
     338                 :            :   "drop table if exists buildids7_r_de;\n"
     339                 :            :   "drop table if exists buildids7_r_sref;\n"
     340                 :            :   "drop table if exists buildids7_r_sdef;\n"
     341                 :            :   "drop table if exists buildids7_file_mtime_scanned;\n"
     342                 :            :   "drop table if exists buildids7_files;\n"
     343                 :            :   "drop table if exists buildids7_buildids;\n"
     344                 :            : // buildids6: drop bolo/rfolo again, represent sources / rpmcontents in main table
     345                 :            :   "drop table if exists buildids6_norm;\n"
     346                 :            :   "drop table if exists buildids6_files;\n"
     347                 :            :   "drop table if exists buildids6_buildids;\n"
     348                 :            :   "drop view if exists buildids6;\n"
     349                 :            : // buildids5: redefine srcfile1 column to be '.'-less (for rpms)
     350                 :            :   "drop table if exists buildids5_norm;\n"
     351                 :            :   "drop table if exists buildids5_files;\n"
     352                 :            :   "drop table if exists buildids5_buildids;\n"
     353                 :            :   "drop table if exists buildids5_bolo;\n"
     354                 :            :   "drop table if exists buildids5_rfolo;\n"
     355                 :            :   "drop view if exists buildids5;\n"
     356                 :            : // buildids4: introduce rpmfile RFOLO
     357                 :            :   "drop table if exists buildids4_norm;\n"
     358                 :            :   "drop table if exists buildids4_files;\n"
     359                 :            :   "drop table if exists buildids4_buildids;\n"
     360                 :            :   "drop table if exists buildids4_bolo;\n"
     361                 :            :   "drop table if exists buildids4_rfolo;\n"
     362                 :            :   "drop view if exists buildids4;\n"
     363                 :            : // buildids3*: split out srcfile BOLO
     364                 :            :   "drop table if exists buildids3_norm;\n"
     365                 :            :   "drop table if exists buildids3_files;\n"
     366                 :            :   "drop table if exists buildids3_buildids;\n"
     367                 :            :   "drop table if exists buildids3_bolo;\n"
     368                 :            :   "drop view if exists buildids3;\n"
     369                 :            : // buildids2: normalized buildid and filenames into interning tables;
     370                 :            :   "drop table if exists buildids2_norm;\n"
     371                 :            :   "drop table if exists buildids2_files;\n"
     372                 :            :   "drop table if exists buildids2_buildids;\n"
     373                 :            :   "drop view if exists buildids2;\n"
     374                 :            :   // buildids1: made buildid and artifacttype NULLable, to represent cached-negative
     375                 :            : //           lookups from sources, e.g. files or rpms that contain no buildid-indexable content
     376                 :            :   "drop table if exists buildids1;\n"
     377                 :            : // buildids: original
     378                 :            :   "drop table if exists buildids;\n"
     379                 :            :   ;
     380                 :            : 
     381                 :            : static const char DEBUGINFOD_SQLITE_CLEANUP_DDL[] =
     382                 :            :   "pragma wal_checkpoint = truncate;\n" // clean out any preexisting wal file
     383                 :            :   ;
     384                 :            : 
     385                 :            : 
     386                 :            : 
     387                 :            : 
     388                 :            : /* Name and version of program.  */
     389                 :            : ARGP_PROGRAM_VERSION_HOOK_DEF = print_version;
     390                 :            : 
     391                 :            : /* Bug report address.  */
     392                 :            : ARGP_PROGRAM_BUG_ADDRESS_DEF = PACKAGE_BUGREPORT;
     393                 :            : 
     394                 :            : /* Definitions of arguments for argp functions.  */
     395                 :            : static const struct argp_option options[] =
     396                 :            :   {
     397                 :            :    { NULL, 0, NULL, 0, "Scanners:", 1 },
     398                 :            :    { "scan-file-dir", 'F', NULL, 0, "Enable ELF/DWARF file scanning.", 0 },
     399                 :            :    { "scan-rpm-dir", 'R', NULL, 0, "Enable RPM scanning.", 0 },
     400                 :            :    { "scan-deb-dir", 'U', NULL, 0, "Enable DEB scanning.", 0 },
     401                 :            :    { "scan-archive", 'Z', "EXT=CMD", 0, "Enable arbitrary archive scanning.", 0 },
     402                 :            :    // "source-oci-imageregistry"  ...
     403                 :            : 
     404                 :            :    { NULL, 0, NULL, 0, "Options:", 2 },
     405                 :            :    { "logical", 'L', NULL, 0, "Follow symlinks, default=ignore.", 0 },
     406                 :            :    { "rescan-time", 't', "SECONDS", 0, "Number of seconds to wait between rescans, 0=disable.", 0 },
     407                 :            :    { "groom-time", 'g', "SECONDS", 0, "Number of seconds to wait between database grooming, 0=disable.", 0 },
     408                 :            :    { "maxigroom", 'G', NULL, 0, "Run a complete database groom/shrink pass at startup.", 0 },
     409                 :            :    { "concurrency", 'c', "NUM", 0, "Limit scanning thread concurrency to NUM, default=#CPUs.", 0 },
     410                 :            :    { "connection-pool", 'C', "NUM", OPTION_ARG_OPTIONAL,
     411                 :            :      "Use webapi connection pool with NUM threads, default=unlim.", 0 },
     412                 :            :    { "include", 'I', "REGEX", 0, "Include files matching REGEX, default=all.", 0 },
     413                 :            :    { "exclude", 'X', "REGEX", 0, "Exclude files matching REGEX, default=none.", 0 },
     414                 :            :    { "port", 'p', "NUM", 0, "HTTP port to listen on, default 8002.", 0 },
     415                 :            :    { "database", 'd', "FILE", 0, "Path to sqlite database.", 0 },
     416                 :            :    { "ddl", 'D', "SQL", 0, "Apply extra sqlite ddl/pragma to connection.", 0 },
     417                 :            :    { "verbose", 'v', NULL, 0, "Increase verbosity.", 0 },
     418                 :            :    { "regex-groom", 'r', NULL, 0,"Uses regexes from -I and -X arguments to groom the database.",0},
     419                 :            : #define ARGP_KEY_FDCACHE_FDS 0x1001
     420                 :            :    { "fdcache-fds", ARGP_KEY_FDCACHE_FDS, "NUM", 0, "Maximum number of archive files to keep in fdcache.", 0 },
     421                 :            : #define ARGP_KEY_FDCACHE_MBS 0x1002
     422                 :            :    { "fdcache-mbs", ARGP_KEY_FDCACHE_MBS, "MB", 0, "Maximum total size of archive file fdcache.", 0 },
     423                 :            : #define ARGP_KEY_FDCACHE_PREFETCH 0x1003
     424                 :            :    { "fdcache-prefetch", ARGP_KEY_FDCACHE_PREFETCH, "NUM", 0, "Number of archive files to prefetch into fdcache.", 0 },
     425                 :            : #define ARGP_KEY_FDCACHE_MINTMP 0x1004
     426                 :            :    { "fdcache-mintmp", ARGP_KEY_FDCACHE_MINTMP, "NUM", 0, "Minimum free space% on tmpdir.", 0 },
     427                 :            : #define ARGP_KEY_FDCACHE_PREFETCH_MBS 0x1005
     428                 :            :    { "fdcache-prefetch-mbs", ARGP_KEY_FDCACHE_PREFETCH_MBS, "MB", 0,"Megabytes allocated to the \
     429                 :            :       prefetch cache.", 0},
     430                 :            : #define ARGP_KEY_FDCACHE_PREFETCH_FDS 0x1006
     431                 :            :    { "fdcache-prefetch-fds", ARGP_KEY_FDCACHE_PREFETCH_FDS, "NUM", 0,"Number of files allocated to the \
     432                 :            :       prefetch cache.", 0},
     433                 :            : #define ARGP_KEY_FORWARDED_TTL_LIMIT 0x1007
     434                 :            :    {"forwarded-ttl-limit", ARGP_KEY_FORWARDED_TTL_LIMIT, "NUM", 0, "Limit of X-Forwarded-For hops, default 8.", 0},
     435                 :            : #define ARGP_KEY_PASSIVE 0x1008
     436                 :            :    { "passive", ARGP_KEY_PASSIVE, NULL, 0, "Do not scan or groom, read-only database.", 0 },
     437                 :            : #define ARGP_KEY_DISABLE_SOURCE_SCAN 0x1009
     438                 :            :    { "disable-source-scan", ARGP_KEY_DISABLE_SOURCE_SCAN, NULL, 0, "Do not scan dwarf source info.", 0 },
     439                 :            : #define ARGP_SCAN_CHECKPOINT 0x100A
     440                 :            :    { "scan-checkpoint", ARGP_SCAN_CHECKPOINT, "NUM", 0, "Number of files scanned before a WAL checkpoint.", 0 },
     441                 :            :    { NULL, 0, NULL, 0, NULL, 0 },
     442                 :            :   };
     443                 :            : 
     444                 :            : /* Short description of program.  */
     445                 :            : static const char doc[] = "Serve debuginfo-related content across HTTP from files under PATHs.";
     446                 :            : 
     447                 :            : /* Strings for arguments in help texts.  */
     448                 :            : static const char args_doc[] = "[PATH ...]";
     449                 :            : 
     450                 :            : /* Prototype for option handler.  */
     451                 :            : static error_t parse_opt (int key, char *arg, struct argp_state *state);
     452                 :            : 
     453                 :            : static unsigned default_concurrency();
     454                 :            : 
     455                 :            : /* Data structure to communicate with argp functions.  */
     456                 :            : static struct argp argp =
     457                 :            :   {
     458                 :            :    options, parse_opt, args_doc, doc, NULL, NULL, NULL
     459                 :            :   };
     460                 :            : 
     461                 :            : 
     462                 :            : static string db_path;
     463                 :            : static sqlite3 *db;  // single connection, serialized across all our threads!
     464                 :            : static sqlite3 *dbq; // webapi query-servicing readonly connection, serialized ditto!
     465                 :            : static unsigned verbose;
     466                 :            : static volatile sig_atomic_t interrupted = 0;
     467                 :            : static volatile sig_atomic_t forced_rescan_count = 0;
     468                 :            : static volatile sig_atomic_t sigusr1 = 0;
     469                 :            : static volatile sig_atomic_t forced_groom_count = 0;
     470                 :            : static volatile sig_atomic_t sigusr2 = 0;
     471                 :            : static unsigned http_port = 8002;
     472                 :            : static unsigned rescan_s = 300;
     473                 :            : static unsigned groom_s = 86400;
     474                 :            : static bool maxigroom = false;
     475                 :            : static unsigned concurrency = default_concurrency();
     476                 :            : static int connection_pool = 0;
     477                 :            : static set<string> source_paths;
     478                 :            : static bool scan_files = false;
     479                 :            : static map<string,string> scan_archives;
     480                 :            : static vector<string> extra_ddl;
     481                 :            : static regex_t file_include_regex;
     482                 :            : static regex_t file_exclude_regex;
     483                 :            : static bool regex_groom = false;
     484                 :            : static bool traverse_logical;
     485                 :            : static long fdcache_fds;
     486                 :            : static long fdcache_mbs;
     487                 :            : static long fdcache_prefetch;
     488                 :            : static long fdcache_mintmp;
     489                 :            : static long fdcache_prefetch_mbs;
     490                 :            : static long fdcache_prefetch_fds;
     491                 :            : static unsigned forwarded_ttl_limit = 8;
     492                 :            : static bool scan_source_info = true;
     493                 :            : static string tmpdir;
     494                 :            : static bool passive_p = false;
     495                 :            : static long scan_checkpoint = 256;
     496                 :            : 
     497                 :            : static void set_metric(const string& key, double value);
     498                 :            : // static void inc_metric(const string& key);
     499                 :            : static void set_metric(const string& metric,
     500                 :            :                        const string& lname, const string& lvalue,
     501                 :            :                        double value);
     502                 :            : static void inc_metric(const string& metric,
     503                 :            :                        const string& lname, const string& lvalue);
     504                 :            : static void add_metric(const string& metric,
     505                 :            :                        const string& lname, const string& lvalue,
     506                 :            :                        double value);
     507                 :            : static void inc_metric(const string& metric,
     508                 :            :                        const string& lname, const string& lvalue,
     509                 :            :                        const string& rname, const string& rvalue);
     510                 :            : static void add_metric(const string& metric,
     511                 :            :                        const string& lname, const string& lvalue,
     512                 :            :                        const string& rname, const string& rvalue,                       
     513                 :            :                        double value);
     514                 :            : 
     515                 :            : 
     516                 :            : class tmp_inc_metric { // a RAII style wrapper for exception-safe scoped increment & decrement
     517                 :            :   string m, n, v;
     518                 :            : public:
     519                 :       2077 :   tmp_inc_metric(const string& mname, const string& lname, const string& lvalue):
     520   [ +  -  +  - ]:       2077 :     m(mname), n(lname), v(lvalue)
     521                 :            :   {
     522         [ +  - ]:       2077 :     add_metric (m, n, v, 1);
     523   [ -  -  -  -  :       2077 :   }
                   -  - ]
     524                 :       2077 :   ~tmp_inc_metric()
     525                 :            :   {
     526                 :       2077 :     add_metric (m, n, v, -1);
     527   [ -  +  -  +  :       2077 :   }
                   -  + ]
     528                 :            : };
     529                 :            : 
     530                 :            : class tmp_ms_metric { // a RAII style wrapper for exception-safe scoped timing
     531                 :            :   string m, n, v;
     532                 :            :   struct timespec ts_start;
     533                 :            : public:
     534                 :      98186 :   tmp_ms_metric(const string& mname, const string& lname, const string& lvalue):
     535   [ +  -  +  - ]:      98186 :     m(mname), n(lname), v(lvalue)
     536                 :            :   {
     537                 :      98184 :     clock_gettime (CLOCK_MONOTONIC, & ts_start);
     538   [ -  -  -  - ]:      98195 :   }
     539                 :      98215 :   ~tmp_ms_metric()
     540                 :            :   {
     541                 :      98215 :     struct timespec ts_end;
     542                 :      98215 :     clock_gettime (CLOCK_MONOTONIC, & ts_end);
     543                 :      98213 :     double deltas = (ts_end.tv_sec - ts_start.tv_sec)
     544                 :      98213 :       + (ts_end.tv_nsec - ts_start.tv_nsec)/1.e9;
     545                 :            : 
     546         [ +  - ]:      98213 :     add_metric (m + "_milliseconds_sum", n, v, (deltas*1000.0));
     547         [ +  + ]:      98222 :     inc_metric (m + "_milliseconds_count", n, v);
     548   [ +  +  -  +  :     173055 :   }
                   -  + ]
     549                 :            : };
     550                 :            : 
     551                 :            : 
     552                 :            : /* Handle program arguments.  */
     553                 :            : static error_t
     554                 :       1124 : parse_opt (int key, char *arg,
     555                 :            :            struct argp_state *state __attribute__ ((unused)))
     556                 :            : {
     557                 :       1124 :   int rc;
     558   [ +  +  +  +  :       1124 :   switch (key)
          +  +  +  +  -  
          +  +  -  -  +  
          +  +  +  +  +  
          +  +  +  +  +  
             +  +  -  +  
                      + ]
     559                 :            :     {
     560                 :        278 :     case 'v': verbose ++; break;
     561                 :         72 :     case 'd':
     562                 :            :       /* When using the in-memory database make sure it is shareable,
     563                 :            :          so we can open it twice as read/write and read-only.  */
     564         [ +  + ]:         72 :       if (strcmp (arg, ":memory:") == 0)
     565                 :       1138 :         db_path = "file::memory:?cache=shared";
     566                 :            :       else
     567         [ +  - ]:        116 :         db_path = string(arg);
     568                 :            :       break;
     569                 :         72 :     case 'p': http_port = (unsigned) atoi(arg);
     570         [ +  - ]:         72 :       if (http_port == 0 || http_port > 65535)
     571                 :          0 :         argp_failure(state, 1, EINVAL, "port number");
     572                 :            :       break;
     573                 :         48 :     case 'F': scan_files = true; break;
     574                 :         22 :     case 'R':
     575   [ +  -  +  -  :         22 :       scan_archives[".rpm"]="cat"; // libarchive groks rpm natively
                   -  + ]
     576                 :         22 :       break;
     577                 :         14 :     case 'U':
     578   [ +  -  +  -  :         14 :       scan_archives[".deb"]="(bsdtar -O -x -f - data.tar\\*)<";
                   -  + ]
     579   [ +  -  +  -  :         14 :       scan_archives[".ddeb"]="(bsdtar -O -x -f - data.tar\\*)<";
                   -  + ]
     580   [ +  -  +  -  :         14 :       scan_archives[".ipk"]="(bsdtar -O -x -f - data.tar\\*)<";
                   -  + ]
     581                 :            :       // .udeb too?
     582                 :         14 :       break;
     583                 :         38 :     case 'Z':
     584                 :         38 :       {
     585         [ -  + ]:         38 :         char* extension = strchr(arg, '=');
     586         [ -  + ]:         38 :         if (arg[0] == '\0')
     587                 :          0 :           argp_failure(state, 1, EINVAL, "missing EXT");
     588         [ +  + ]:         38 :         else if (extension)
     589   [ +  -  +  -  :         20 :           scan_archives[string(arg, (extension-arg))]=string(extension+1);
          -  +  -  +  -  
                      - ]
     590                 :            :         else
     591   [ +  -  +  -  :         18 :           scan_archives[string(arg)]=string("cat");
          -  +  -  +  -  
                      - ]
     592                 :            :       }
     593                 :            :       break;
     594                 :          8 :     case 'L':
     595         [ -  + ]:          8 :       if (passive_p)
     596                 :          0 :         argp_failure(state, 1, EINVAL, "-L option inconsistent with passive mode");
     597                 :          8 :       traverse_logical = true;
     598                 :          8 :       break;
     599                 :          0 :     case 'D':
     600         [ #  # ]:          0 :       if (passive_p)
     601                 :          0 :         argp_failure(state, 1, EINVAL, "-D option inconsistent with passive mode");
     602         [ #  # ]:          0 :       extra_ddl.push_back(string(arg));
     603                 :          0 :       break;
     604                 :         58 :     case 't':
     605         [ -  + ]:         58 :       if (passive_p)
     606                 :          0 :         argp_failure(state, 1, EINVAL, "-t option inconsistent with passive mode");
     607                 :         58 :       rescan_s = (unsigned) atoi(arg);
     608                 :         58 :       break;
     609                 :         58 :     case 'g':
     610         [ -  + ]:         58 :       if (passive_p)
     611                 :          0 :         argp_failure(state, 1, EINVAL, "-g option inconsistent with passive mode");
     612                 :         58 :       groom_s = (unsigned) atoi(arg);
     613                 :         58 :       break;
     614                 :          0 :     case 'G':
     615         [ #  # ]:          0 :       if (passive_p)
     616                 :          0 :         argp_failure(state, 1, EINVAL, "-G option inconsistent with passive mode");
     617                 :          0 :       maxigroom = true;
     618                 :          0 :       break;
     619                 :          0 :     case 'c':
     620         [ #  # ]:          0 :       if (passive_p)
     621                 :          0 :         argp_failure(state, 1, EINVAL, "-c option inconsistent with passive mode");
     622                 :          0 :       concurrency = (unsigned) atoi(arg);
     623         [ #  # ]:          0 :       if (concurrency < 1) concurrency = 1;
     624                 :            :       break;
     625                 :          6 :     case 'C':
     626         [ +  + ]:          6 :       if (arg)
     627                 :            :         {
     628                 :          4 :           connection_pool = atoi(arg);
     629         [ +  - ]:          4 :           if (connection_pool < 2)
     630                 :          0 :             argp_failure(state, 1, EINVAL, "-C NUM minimum 2");
     631                 :            :         }
     632                 :            :       break;
     633                 :          4 :     case 'I':
     634                 :            :       // NB: no problem with unconditional free here - an earlier failed regcomp would exit program
     635         [ -  + ]:          4 :       if (passive_p)
     636                 :          0 :         argp_failure(state, 1, EINVAL, "-I option inconsistent with passive mode");
     637                 :          4 :       regfree (&file_include_regex);
     638                 :          4 :       rc = regcomp (&file_include_regex, arg, REG_EXTENDED|REG_NOSUB);
     639         [ +  - ]:          4 :       if (rc != 0)
     640                 :          0 :         argp_failure(state, 1, EINVAL, "regular expression");
     641                 :            :       break;
     642                 :          6 :     case 'X':
     643         [ -  + ]:          6 :       if (passive_p)
     644                 :          0 :         argp_failure(state, 1, EINVAL, "-X option inconsistent with passive mode");
     645                 :          6 :       regfree (&file_exclude_regex);
     646                 :          6 :       rc = regcomp (&file_exclude_regex, arg, REG_EXTENDED|REG_NOSUB);
     647         [ +  - ]:          6 :       if (rc != 0)
     648                 :          0 :         argp_failure(state, 1, EINVAL, "regular expression");
     649                 :            :       break;
     650                 :          4 :     case 'r':
     651         [ -  + ]:          4 :       if (passive_p)
     652                 :          0 :         argp_failure(state, 1, EINVAL, "-r option inconsistent with passive mode");
     653                 :          4 :       regex_groom = true;
     654                 :          4 :       break;
     655                 :         10 :     case ARGP_KEY_FDCACHE_FDS:
     656                 :         10 :       fdcache_fds = atol (arg);
     657                 :         10 :       break;
     658                 :          4 :     case ARGP_KEY_FDCACHE_MBS:
     659                 :          4 :       fdcache_mbs = atol (arg);
     660                 :          4 :       break;
     661                 :          2 :     case ARGP_KEY_FDCACHE_PREFETCH:
     662                 :          2 :       fdcache_prefetch = atol (arg);
     663                 :          2 :       break;
     664                 :          2 :     case ARGP_KEY_FDCACHE_MINTMP:
     665                 :          2 :       fdcache_mintmp = atol (arg);
     666         [ +  - ]:          2 :       if( fdcache_mintmp > 100 || fdcache_mintmp < 0 )
     667                 :          0 :         argp_failure(state, 1, EINVAL, "fdcache mintmp percent");
     668                 :            :       break;
     669                 :          4 :     case ARGP_KEY_FORWARDED_TTL_LIMIT:
     670                 :          4 :       forwarded_ttl_limit = (unsigned) atoi(arg);
     671                 :          4 :       break;
     672                 :        100 :     case ARGP_KEY_ARG:
     673         [ +  - ]:        100 :       source_paths.insert(string(arg));
     674                 :        100 :       break;
     675                 :         10 :     case ARGP_KEY_FDCACHE_PREFETCH_FDS:
     676                 :         10 :       fdcache_prefetch_fds = atol(arg);
     677         [ +  - ]:         10 :       if ( fdcache_prefetch_fds < 0)
     678                 :          0 :         argp_failure(state, 1, EINVAL, "fdcache prefetch fds");
     679                 :            :       break;
     680                 :          2 :     case ARGP_KEY_FDCACHE_PREFETCH_MBS:
     681                 :          2 :       fdcache_prefetch_mbs = atol(arg);
     682         [ +  - ]:          2 :       if ( fdcache_prefetch_mbs < 0)
     683                 :          0 :         argp_failure(state, 1, EINVAL, "fdcache prefetch mbs");
     684                 :            :       break;
     685                 :          2 :     case ARGP_KEY_PASSIVE:
     686                 :          2 :       passive_p = true;
     687         [ +  - ]:          2 :       if (source_paths.size() > 0
     688         [ +  - ]:          2 :           || maxigroom
     689         [ +  - ]:          2 :           || extra_ddl.size() > 0
     690   [ +  -  +  - ]:          4 :           || traverse_logical)
     691                 :            :         // other conflicting options tricky to check
     692                 :          0 :         argp_failure(state, 1, EINVAL, "inconsistent options with passive mode");
     693                 :            :       break;
     694                 :          0 :     case ARGP_KEY_DISABLE_SOURCE_SCAN:
     695                 :          0 :       scan_source_info = false;
     696                 :          0 :       break;
     697                 :          2 :     case ARGP_SCAN_CHECKPOINT:
     698                 :          2 :       scan_checkpoint = atol (arg);
     699         [ +  - ]:          2 :       if (scan_checkpoint < 0)
     700                 :          0 :         argp_failure(state, 1, EINVAL, "scan checkpoint");        
     701                 :            :       break;
     702                 :            :       // case 'h': argp_state_help (state, stderr, ARGP_HELP_LONG|ARGP_HELP_EXIT_OK);
     703                 :            :     default: return ARGP_ERR_UNKNOWN;
     704                 :            :     }
     705                 :            : 
     706                 :            :   return 0;
     707                 :            : }
     708                 :            : 
     709                 :            : 
     710                 :            : ////////////////////////////////////////////////////////////////////////
     711                 :            : 
     712                 :            : 
     713                 :            : static void add_mhd_response_header (struct MHD_Response *r,
     714                 :            :                                      const char *h, const char *v);
     715                 :            : 
     716                 :            : // represent errors that may get reported to an ostream and/or a libmicrohttpd connection
     717                 :            : 
     718                 :          8 : struct reportable_exception
     719                 :            : {
     720                 :            :   int code;
     721                 :            :   string message;
     722                 :            : 
     723   [ -  -  +  -  :         86 :   reportable_exception(int c, const string& m): code(c), message(m) {}
          -  -  +  -  +  
                      - ]
     724   [ -  -  -  -  :        602 :   reportable_exception(const string& m): code(503), message(m) {}
          -  -  -  -  +  
          -  -  -  -  -  
          +  -  -  -  -  
          -  -  -  +  -  
                   -  - ]
     725                 :            :   reportable_exception(): code(503), message() {}
     726                 :            : 
     727                 :            :   void report(ostream& o) const; // defined under obatched() class below
     728                 :            : 
     729                 :        632 :   MHD_RESULT mhd_send_response(MHD_Connection* c) const {
     730                 :       1264 :     MHD_Response* r = MHD_create_response_from_buffer (message.size(),
     731                 :        632 :                                                        (void*) message.c_str(),
     732                 :            :                                                        MHD_RESPMEM_MUST_COPY);
     733                 :        632 :     add_mhd_response_header (r, "Content-Type", "text/plain");
     734                 :        632 :     MHD_RESULT rc = MHD_queue_response (c, code, r);
     735                 :        632 :     MHD_destroy_response (r);
     736                 :        632 :     return rc;
     737                 :            :   }
     738                 :            : };
     739                 :            : 
     740                 :            : 
     741                 :            : struct sqlite_exception: public reportable_exception
     742                 :            : {
     743                 :          0 :   sqlite_exception(int rc, const string& msg):
     744   [ #  #  #  #  :          0 :     reportable_exception(string("sqlite3 error: ") + msg + ": " + string(sqlite3_errstr(rc) ?: "?")) {
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
     745   [ #  #  #  #  :          0 :     inc_metric("error_count","sqlite3",sqlite3_errstr(rc));
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
     746         [ #  # ]:          0 :   }
     747                 :            : };
     748                 :            : 
     749   [ +  -  -  - ]:          4 : struct libc_exception: public reportable_exception
     750                 :            : {
     751                 :        594 :   libc_exception(int rc, const string& msg):
     752   [ -  +  +  -  :       2376 :     reportable_exception(string("libc error: ") + msg + ": " + string(strerror(rc) ?: "?")) {
          +  -  +  -  +  
          -  -  +  -  +  
          -  +  +  -  -  
                      - ]
     753   [ +  -  +  -  :       1188 :     inc_metric("error_count","libc",strerror(rc));
          +  -  +  -  -  
          +  +  -  -  -  
                   -  - ]
     754         [ -  - ]:        594 :   }
     755                 :            : };
     756                 :            : 
     757                 :            : 
     758                 :            : struct archive_exception: public reportable_exception
     759                 :            : {
     760                 :          0 :   archive_exception(const string& msg):
     761   [ #  #  #  #  :          0 :     reportable_exception(string("libarchive error: ") + msg) {
                   #  # ]
     762   [ #  #  #  #  :          0 :       inc_metric("error_count","libarchive",msg);
          #  #  #  #  #  
                      # ]
     763         [ #  # ]:          0 :   }
     764                 :          0 :   archive_exception(struct archive* a, const string& msg):
     765   [ #  #  #  #  :          0 :     reportable_exception(string("libarchive error: ") + msg + ": " + string(archive_error_string(a) ?: "?")) {
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
     766   [ #  #  #  #  :          0 :     inc_metric("error_count","libarchive",msg + ": " + string(archive_error_string(a) ?: "?"));
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
     767         [ #  # ]:          0 :   }
     768                 :            : };
     769                 :            : 
     770                 :            : 
     771                 :            : struct elfutils_exception: public reportable_exception
     772                 :            : {
     773                 :          0 :   elfutils_exception(int rc, const string& msg):
     774   [ #  #  #  #  :          0 :     reportable_exception(string("elfutils error: ") + msg + ": " + string(elf_errmsg(rc) ?: "?")) {
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
     775   [ #  #  #  #  :          0 :     inc_metric("error_count","elfutils",elf_errmsg(rc));
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  # ]
     776         [ #  # ]:          0 :   }
     777                 :            : };
     778                 :            : 
     779                 :            : 
     780                 :            : ////////////////////////////////////////////////////////////////////////
     781                 :            : 
     782                 :            : template <typename Payload>
     783                 :            : class workq
     784                 :            : {
     785                 :            :   unordered_set<Payload> q; // eliminate duplicates
     786                 :            :   mutex mtx;
     787                 :            :   condition_variable cv;
     788                 :            :   bool dead;
     789                 :            :   unsigned idlers;   // number of threads busy with wait_idle / done_idle
     790                 :            :   unsigned fronters; // number of threads busy with wait_front / done_front
     791                 :            : 
     792                 :            : public:
     793                 :         72 :   workq() { dead = false; idlers = 0; fronters = 0; }
     794                 :         72 :   ~workq() {}
     795                 :            : 
     796                 :        940 :   void push_back(const Payload& p)
     797                 :            :   {
     798                 :        940 :     unique_lock<mutex> lock(mtx);
     799         [ +  - ]:        940 :     q.insert (p);
     800   [ +  -  +  -  :       1880 :     set_metric("thread_work_pending","role","scan", q.size());
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
     801                 :        940 :     cv.notify_all();
     802                 :        940 :   }
     803                 :            : 
     804                 :            :   // kill this workqueue, wake up all idlers / scanners
     805                 :         72 :   void nuke() {
     806                 :         72 :     unique_lock<mutex> lock(mtx);
     807                 :            :     // optional: q.clear();
     808                 :         72 :     dead = true;
     809                 :         72 :     cv.notify_all();
     810                 :         72 :   }
     811                 :            : 
     812                 :            :   // clear the workqueue, when scanning is interrupted with USR2
     813                 :          0 :   void clear() {
     814                 :          0 :     unique_lock<mutex> lock(mtx);
     815                 :          0 :     q.clear();
     816   [ #  #  #  #  :          0 :     set_metric("thread_work_pending","role","scan", q.size());
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
     817                 :            :     // NB: there may still be some live fronters
     818                 :          0 :     cv.notify_all(); // maybe wake up waiting idlers
     819                 :          0 :   }
     820                 :            : 
     821                 :            :   // block this scanner thread until there is work to do and no active idler
     822                 :       1196 :   bool wait_front (Payload& p)
     823                 :            :   {
     824                 :       1196 :     unique_lock<mutex> lock(mtx);
     825   [ +  +  +  +  :       4828 :     while (!dead && (q.size() == 0 || idlers > 0))
                   +  + ]
     826         [ +  - ]:       3632 :       cv.wait(lock);
     827         [ +  + ]:       1196 :     if (dead)
     828                 :            :       return false;
     829                 :            :     else
     830                 :            :       {
     831         [ +  - ]:        940 :         p = * q.begin();
     832                 :        940 :         q.erase (q.begin());
     833                 :        940 :         fronters ++; // prevent idlers from starting awhile, even if empty q
     834   [ +  -  +  -  :       1880 :         set_metric("thread_work_pending","role","scan", q.size());
          +  -  +  -  -  
          +  -  +  -  -  
             -  -  -  - ]
     835                 :            :         // NB: don't wake up idlers yet!  The consumer is busy
     836                 :            :         // processing this element until it calls done_front().
     837                 :        940 :         return true;
     838                 :            :       }
     839                 :       1196 :   }
     840                 :            : 
     841                 :            :   // notify waitq that scanner thread is done with that last item
     842                 :        940 :   void done_front ()
     843                 :            :   {
     844                 :        940 :     unique_lock<mutex> lock(mtx);
     845                 :        940 :     fronters --;
     846   [ +  +  +  + ]:        940 :     if (q.size() == 0 && fronters == 0)
     847                 :         95 :       cv.notify_all(); // maybe wake up waiting idlers
     848                 :        940 :   }
     849                 :            :   
     850                 :            :   // block this idler thread until there is no work to do
     851                 :        606 :   void wait_idle ()
     852                 :            :   {
     853                 :        606 :     unique_lock<mutex> lock(mtx);
     854                 :        606 :     cv.notify_all(); // maybe wake up waiting scanners
     855   [ +  +  +  +  :        680 :     while (!dead && ((q.size() != 0) || fronters > 0))
                   +  + ]
     856         [ +  - ]:         74 :       cv.wait(lock);
     857         [ +  - ]:        606 :     idlers ++;
     858                 :        606 :   }
     859                 :            : 
     860                 :        536 :   void done_idle ()
     861                 :            :   {
     862                 :        536 :     unique_lock<mutex> lock(mtx);
     863                 :        536 :     idlers --;
     864                 :        536 :     cv.notify_all(); // maybe wake up waiting scanners, but probably not (shutting down)
     865                 :        536 :   }
     866                 :            : };
     867                 :            : 
     868                 :            : typedef struct stat stat_t;
     869                 :            : typedef pair<string,stat_t> scan_payload;
     870                 :            : inline bool operator< (const scan_payload& a, const scan_payload& b)
     871                 :            : {
     872                 :            :   return a.first < b.first; // don't bother compare the stat fields
     873                 :            : }
     874                 :            : 
     875                 :            : namespace std { // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480
     876                 :            :   template<> struct hash<::scan_payload>
     877                 :            :   {
     878                 :       3547 :     std::size_t operator() (const ::scan_payload& p) const noexcept
     879                 :            :     {
     880   [ +  +  +  + ]:       3547 :       return hash<string>()(p.first);
     881                 :            :     }
     882                 :            :   };
     883                 :            :   template<> struct equal_to<::scan_payload>
     884                 :            :   {
     885                 :        267 :     std::size_t operator() (const ::scan_payload& a, const ::scan_payload& b) const noexcept
     886                 :            :     {
     887   [ -  +  -  - ]:        267 :       return a.first == b.first;
     888                 :            :     }
     889                 :            :   };
     890                 :            : }
     891                 :            : 
     892                 :            : static workq<scan_payload> scanq; // just a single one
     893                 :            : // producer & idler: thread_main_fts_source_paths()
     894                 :            : // consumer: thread_main_scanner()
     895                 :            : // idler: thread_main_groom()
     896                 :            : 
     897                 :            : 
     898                 :            : ////////////////////////////////////////////////////////////////////////
     899                 :            : 
     900                 :            : // Unique set is a thread-safe structure that lends 'ownership' of a value
     901                 :            : // to a thread.  Other threads requesting the same thing are made to wait.
     902                 :            : // It's like a semaphore-on-demand.
     903                 :            : template <typename T>
     904                 :            : class unique_set
     905                 :            : {
     906                 :            : private:
     907                 :            :   set<T> values;
     908                 :            :   mutex mtx;
     909                 :            :   condition_variable cv;
     910                 :            : public:
     911                 :         56 :   unique_set() {}
     912                 :         56 :   ~unique_set() {}
     913                 :            : 
     914                 :       1386 :   void acquire(const T& value)
     915                 :            :   {
     916                 :       1386 :     unique_lock<mutex> lock(mtx);
     917         [ +  + ]:       5485 :     while (values.find(value) != values.end())
     918         [ +  - ]:       4099 :       cv.wait(lock);
     919         [ +  - ]:       1386 :     values.insert(value);
     920                 :       1386 :   }
     921                 :            : 
     922                 :       1386 :   void release(const T& value)
     923                 :            :   {
     924                 :       1386 :     unique_lock<mutex> lock(mtx);
     925                 :            :     // assert (values.find(value) != values.end());
     926                 :       1386 :     values.erase(value);
     927                 :       1386 :     cv.notify_all();
     928                 :       1386 :   }
     929                 :            : };
     930                 :            : 
     931                 :            : 
     932                 :            : // This is the object that's instantiate to uniquely hold a value in a
     933                 :            : // RAII-pattern way.
     934                 :            : template <typename T>
     935                 :            : class unique_set_reserver
     936                 :            : {
     937                 :            : private:
     938                 :            :   unique_set<T>& please_hold;
     939                 :            :   T mine;
     940                 :            : public:
     941                 :       1386 :   unique_set_reserver(unique_set<T>& t, const T& value):
     942   [ +  -  -  - ]:       1386 :     please_hold(t), mine(value)  { please_hold.acquire(mine); }
     943         [ +  - ]:       1386 :   ~unique_set_reserver() { please_hold.release(mine); }
     944                 :            : };
     945                 :            : 
     946                 :            : 
     947                 :            : ////////////////////////////////////////////////////////////////////////
     948                 :            : 
     949                 :            : // periodic_barrier is a concurrency control object that lets N threads
     950                 :            : // periodically (based on counter value) agree to wait at a barrier,
     951                 :            : // let one of them carry out some work, then be set free
     952                 :            : 
     953                 :            : class periodic_barrier
     954                 :            : {
     955                 :            : private:
     956                 :            :   unsigned period; // number of count() reports to trigger barrier activation
     957                 :            :   unsigned threads; // number of threads participating
     958                 :            :   mutex mtx; // protects all the following fields
     959                 :            :   unsigned counter; // count of count() reports in the current generation
     960                 :            :   unsigned generation; // barrier activation generation
     961                 :            :   unsigned waiting; // number of threads waiting for barrier
     962                 :            :   bool dead; // bring out your
     963                 :            :   condition_variable cv;
     964                 :            : public:
     965                 :         64 :   periodic_barrier(unsigned t, unsigned p):
     966                 :         64 :     period(p), threads(t), counter(0), generation(0), waiting(0), dead(false) { }
     967                 :            :   virtual ~periodic_barrier() {}
     968                 :            : 
     969                 :            :   virtual void periodic_barrier_work() noexcept = 0;
     970                 :         64 :   void nuke() {
     971                 :         64 :     unique_lock<mutex> lock(mtx);
     972                 :         64 :     dead = true;
     973                 :         64 :     cv.notify_all();
     974                 :         64 :   }
     975                 :            :   
     976                 :       1196 :   void count()
     977                 :            :   {
     978                 :       1196 :     unique_lock<mutex> lock(mtx);
     979                 :       1196 :     unsigned prev_generation = this->generation;
     980         [ +  + ]:       1196 :     if (counter < period-1) // normal case: counter just freely running
     981                 :            :       {
     982                 :       1080 :         counter ++;
     983                 :       1080 :         return;
     984                 :            :       }
     985         [ +  + ]:        116 :     else if (counter == period-1) // we're the doer
     986                 :            :       {
     987                 :         30 :         counter = period; // entering barrier holding phase
     988                 :         30 :         cv.notify_all();
     989   [ +  +  +  + ]:        142 :         while (waiting < threads-1 && !dead)
     990         [ +  - ]:         82 :           cv.wait(lock);
     991                 :            :         // all other threads are now stuck in the barrier
     992                 :         30 :         this->periodic_barrier_work(); // NB: we're holding the mutex the whole time
     993                 :            :         // reset for next barrier, releasing other waiters
     994                 :         30 :         counter = 0;
     995                 :         30 :         generation ++;
     996                 :         30 :         cv.notify_all();
     997                 :         30 :         return;
     998                 :            :       }
     999         [ +  - ]:         86 :     else if (counter == period) // we're a waiter, in holding phase
    1000                 :            :       {
    1001                 :         86 :         waiting ++;
    1002                 :         86 :         cv.notify_all();
    1003   [ +  +  +  -  :        308 :         while (counter == period && generation == prev_generation && !dead)
                   +  + ]
    1004         [ +  - ]:        136 :           cv.wait(lock);
    1005                 :         86 :         waiting --;
    1006                 :         86 :         return;
    1007                 :            :       }
    1008                 :       1196 :   }
    1009                 :            : };
    1010                 :            : 
    1011                 :            : 
    1012                 :            : 
    1013                 :            : ////////////////////////////////////////////////////////////////////////
    1014                 :            : 
    1015                 :            : 
    1016                 :            : // Print a standard timestamp.
    1017                 :            : static ostream&
    1018                 :      22044 : timestamp (ostream &o)
    1019                 :            : {
    1020                 :      22044 :   char datebuf[80];
    1021                 :      22044 :   char *now2 = NULL;
    1022                 :      22044 :   time_t now_t = time(NULL);
    1023                 :      22044 :   struct tm now;
    1024                 :      22044 :   struct tm *nowp = gmtime_r (&now_t, &now);
    1025         [ +  - ]:      22044 :   if (nowp)
    1026                 :            :     {
    1027                 :      22044 :       (void) strftime (datebuf, sizeof (datebuf), "%c", nowp);
    1028                 :      22044 :       now2 = datebuf;
    1029                 :            :     }
    1030                 :            : 
    1031                 :      22044 :   return o << "[" << (now2 ? now2 : "") << "] "
    1032         [ -  + ]:      22044 :            << "(" << getpid () << "/" << tid() << "): ";
    1033                 :            : }
    1034                 :            : 
    1035                 :            : 
    1036                 :            : // A little class that impersonates an ostream to the extent that it can
    1037                 :            : // take << streaming operations.  It batches up the bits into an internal
    1038                 :            : // stringstream until it is destroyed; then flushes to the original ostream.
    1039                 :            : // It adds a timestamp
    1040                 :            : class obatched
    1041                 :            : {
    1042                 :            : private:
    1043                 :            :   ostream& o;
    1044                 :            :   stringstream stro;
    1045                 :            :   static mutex lock;
    1046                 :            : public:
    1047                 :      22045 :   obatched(ostream& oo, bool timestamp_p = true): o(oo)
    1048                 :            :   {
    1049         [ +  - ]:      22044 :     if (timestamp_p)
    1050         [ +  - ]:      22044 :       timestamp(stro);
    1051                 :      22043 :   }
    1052                 :      22044 :   ~obatched()
    1053                 :            :   {
    1054                 :      22044 :     unique_lock<mutex> do_not_cross_the_streams(obatched::lock);
    1055         [ +  - ]:      22045 :     o << stro.str();
    1056                 :      22045 :     o.flush();
    1057                 :      22045 :   }
    1058                 :            :   operator ostream& () { return stro; }
    1059   [ -  -  +  -  :      16625 :   template <typename T> ostream& operator << (const T& t) { stro << t; return stro; }
          +  -  +  -  +  
          -  +  -  +  -  
          -  -  -  -  -  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  -  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  -  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  +  -  +  -  
          -  -  -  -  -  
          -  +  -  -  -  
          +  -  -  -  -  
          -  -  -  +  -  
          -  -  +  -  -  
          -  +  -  -  -  
          -  -  +  -  +  
          -  +  -  +  -  
          -  -  +  -  -  
                -  -  - ]
    1060                 :            : };
    1061                 :            : mutex obatched::lock; // just the one, since cout/cerr iostreams are not thread-safe
    1062                 :            : 
    1063                 :            : 
    1064                 :        694 : void reportable_exception::report(ostream& o) const {
    1065   [ +  -  +  - ]:        694 :   obatched(o) << message << endl;
    1066                 :        694 : }
    1067                 :            : 
    1068                 :            : 
    1069                 :            : ////////////////////////////////////////////////////////////////////////
    1070                 :            : 
    1071                 :            : 
    1072                 :            : // RAII style sqlite prepared-statement holder that matches { } block lifetime
    1073                 :            : 
    1074                 :            : struct sqlite_ps
    1075                 :            : {
    1076                 :            : private:
    1077                 :            :   sqlite3* db;
    1078                 :            :   const string nickname;
    1079                 :            :   const string sql;
    1080                 :            :   sqlite3_stmt *pp;
    1081                 :            : 
    1082                 :            :   sqlite_ps(const sqlite_ps&); // make uncopyable
    1083                 :            :   sqlite_ps& operator=(const sqlite_ps &); // make unassignable
    1084                 :            : 
    1085                 :            : public:
    1086   [ +  -  -  - ]:       6399 :   sqlite_ps (sqlite3* d, const string& n, const string& s): db(d), nickname(n), sql(s) {
    1087                 :            :     // tmp_ms_metric tick("sqlite3","prep",nickname);
    1088         [ +  + ]:       6399 :     if (verbose > 4)
    1089   [ +  -  +  -  :        348 :       obatched(clog) << nickname << " prep " << sql << endl;
          +  -  +  -  +  
                -  -  - ]
    1090         [ +  - ]:       6399 :     int rc = sqlite3_prepare_v2 (db, sql.c_str(), -1 /* to \0 */, & this->pp, NULL);
    1091         [ -  + ]:       6400 :     if (rc != SQLITE_OK)
    1092   [ #  #  #  # ]:          0 :       throw sqlite_exception(rc, "prepare " + sql);
    1093                 :       6400 :   }
    1094                 :            : 
    1095                 :      53979 :   sqlite_ps& reset()
    1096                 :            :   {
    1097   [ +  -  +  -  :     107959 :     tmp_ms_metric tick("sqlite3","reset",nickname);
             -  +  -  - ]
    1098         [ +  - ]:      53980 :     sqlite3_reset(this->pp);
    1099                 :      53984 :     return *this;
    1100                 :      53982 :   }
    1101                 :            : 
    1102                 :      57730 :   sqlite_ps& bind(int parameter, const string& str)
    1103                 :            :   {
    1104         [ +  + ]:      57730 :     if (verbose > 4)
    1105   [ +  -  +  -  :       1418 :       obatched(clog) << nickname << " bind " << parameter << "=" << str << endl;
          +  -  +  -  +  
                -  +  - ]
    1106                 :      57730 :     int rc = sqlite3_bind_text (this->pp, parameter, str.c_str(), -1, SQLITE_TRANSIENT);
    1107         [ -  + ]:      57727 :     if (rc != SQLITE_OK)
    1108   [ #  #  #  # ]:          0 :       throw sqlite_exception(rc, "sqlite3 bind");
    1109                 :      57727 :     return *this;
    1110                 :            :   }
    1111                 :            : 
    1112                 :      17717 :   sqlite_ps& bind(int parameter, int64_t value)
    1113                 :            :   {
    1114         [ +  + ]:      17717 :     if (verbose > 4)
    1115   [ +  -  +  -  :        636 :       obatched(clog) << nickname << " bind " << parameter << "=" << value << endl;
          +  -  +  -  +  
                -  +  - ]
    1116                 :      17717 :     int rc = sqlite3_bind_int64 (this->pp, parameter, value);
    1117         [ -  + ]:      17718 :     if (rc != SQLITE_OK)
    1118   [ #  #  #  # ]:          0 :       throw sqlite_exception(rc, "sqlite3 bind");
    1119                 :      17718 :     return *this;
    1120                 :            :   }
    1121                 :            : 
    1122                 :            :   sqlite_ps& bind(int parameter)
    1123                 :            :   {
    1124                 :            :     if (verbose > 4)
    1125                 :            :       obatched(clog) << nickname << " bind " << parameter << "=" << "NULL" << endl;
    1126                 :            :     int rc = sqlite3_bind_null (this->pp, parameter);
    1127                 :            :     if (rc != SQLITE_OK)
    1128                 :            :       throw sqlite_exception(rc, "sqlite3 bind");
    1129                 :            :     return *this;
    1130                 :            :   }
    1131                 :            : 
    1132                 :            : 
    1133                 :      31656 :   void step_ok_done() {
    1134   [ +  -  +  -  :      63309 :     tmp_ms_metric tick("sqlite3","step_done",nickname);
             -  +  -  - ]
    1135         [ +  - ]:      31653 :     int rc = sqlite3_step (this->pp);
    1136         [ +  + ]:      31658 :     if (verbose > 4)
    1137   [ +  -  +  -  :        832 :       obatched(clog) << nickname << " step-ok-done(" << sqlite3_errstr(rc) << ") " << sql << endl;
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
    1138   [ +  +  -  + ]:      31658 :     if (rc != SQLITE_OK && rc != SQLITE_DONE && rc != SQLITE_ROW)
    1139   [ #  #  #  # ]:          0 :       throw sqlite_exception(rc, "sqlite3 step");
    1140         [ +  - ]:      31658 :     (void) sqlite3_reset (this->pp);
    1141                 :      31658 :   }
    1142                 :            : 
    1143                 :            : 
    1144                 :      12580 :   int step() {
    1145   [ +  -  +  -  :      25159 :     tmp_ms_metric tick("sqlite3","step",nickname);
             -  +  -  - ]
    1146         [ +  - ]:      12579 :     int rc = sqlite3_step (this->pp);
    1147         [ +  + ]:      12580 :     if (verbose > 4)
    1148   [ +  -  +  -  :        378 :       obatched(clog) << nickname << " step(" << sqlite3_errstr(rc) << ") " << sql << endl;
          +  -  +  -  +  
          -  +  -  +  -  
                   +  - ]
    1149                 :      12580 :     return rc;
    1150                 :      12580 :   }
    1151                 :            : 
    1152   [ +  +  +  + ]:      12721 :   ~sqlite_ps () { sqlite3_finalize (this->pp); }
    1153   [ +  -  +  -  :       2580 :   operator sqlite3_stmt* () { return this->pp; }
                   +  - ]
    1154                 :            : };
    1155                 :            : 
    1156                 :            : 
    1157                 :            : ////////////////////////////////////////////////////////////////////////
    1158                 :            : 
    1159                 :            : 
    1160                 :            : struct sqlite_checkpoint_pb: public periodic_barrier
    1161                 :            : {
    1162                 :            :   // NB: don't use sqlite_ps since it can throw exceptions during ctor etc.
    1163                 :         64 :   sqlite_checkpoint_pb(unsigned t, unsigned p):
    1164                 :        128 :     periodic_barrier(t, p) { }
    1165                 :            :   
    1166                 :         30 :   void periodic_barrier_work() noexcept
    1167                 :            :   {
    1168                 :         30 :     (void) sqlite3_exec (db, "pragma wal_checkpoint(truncate);", NULL, NULL, NULL);
    1169                 :         30 :   }
    1170                 :            : };
    1171                 :            :   
    1172                 :            : static periodic_barrier* scan_barrier = 0; // initialized in main()
    1173                 :            : 
    1174                 :            : 
    1175                 :            : ////////////////////////////////////////////////////////////////////////
    1176                 :            : 
    1177                 :            : // RAII style templated autocloser
    1178                 :            : 
    1179                 :            : template <class Payload, class Ignore>
    1180                 :            : struct defer_dtor
    1181                 :            : {
    1182                 :            : public:
    1183                 :            :   typedef Ignore (*dtor_fn) (Payload);
    1184                 :            : 
    1185                 :            : private:
    1186                 :            :   Payload p;
    1187                 :            :   dtor_fn fn;
    1188                 :            : 
    1189                 :            : public:
    1190                 :       5342 :   defer_dtor(Payload _p, dtor_fn _fn): p(_p), fn(_fn) {}
    1191                 :       2230 :   ~defer_dtor() { (void) (*fn)(p); }
    1192                 :            : 
    1193                 :            : private:
    1194                 :            :   defer_dtor(const defer_dtor<Payload,Ignore>&); // make uncopyable
    1195                 :            :   defer_dtor& operator=(const defer_dtor<Payload,Ignore> &); // make unassignable
    1196                 :            : };
    1197                 :            : 
    1198                 :            : 
    1199                 :            : 
    1200                 :            : ////////////////////////////////////////////////////////////////////////
    1201                 :            : 
    1202                 :            : 
    1203                 :            : static string
    1204                 :       4166 : header_censor(const string& str)
    1205                 :            : {
    1206                 :       4166 :   string y;
    1207         [ +  + ]:      35187 :   for (auto&& x : str)
    1208                 :            :     {
    1209         [ +  + ]:      31021 :       if (isalnum(x) || x == '/' || x == '.' || x == ',' || x == '_' || x == ':')
    1210         [ +  - ]:      62036 :         y += x;
    1211                 :            :     }
    1212                 :       4166 :   return y;
    1213                 :          0 : }
    1214                 :            : 
    1215                 :            : 
    1216                 :            : static string
    1217                 :       2083 : conninfo (struct MHD_Connection * conn)
    1218                 :            : {
    1219                 :       2083 :   char hostname[256]; // RFC1035
    1220                 :       2083 :   char servname[256];
    1221                 :       2083 :   int sts = -1;
    1222                 :            : 
    1223         [ -  + ]:       2083 :   if (conn == 0)
    1224                 :          0 :     return "internal";
    1225                 :            : 
    1226                 :            :   /* Look up client address data. */
    1227                 :       2083 :   const union MHD_ConnectionInfo *u = MHD_get_connection_info (conn,
    1228                 :            :                                                                MHD_CONNECTION_INFO_CLIENT_ADDRESS);
    1229         [ +  - ]:       2083 :   struct sockaddr *so = u ? u->client_addr : 0;
    1230                 :            : 
    1231   [ +  -  -  + ]:       2083 :   if (so && so->sa_family == AF_INET) {
    1232                 :          0 :     sts = getnameinfo (so, sizeof (struct sockaddr_in),
    1233                 :            :                        hostname, sizeof (hostname),
    1234                 :            :                        servname, sizeof (servname),
    1235                 :            :                        NI_NUMERICHOST | NI_NUMERICSERV);
    1236         [ +  - ]:       2083 :   } else if (so && so->sa_family == AF_INET6) {
    1237                 :       2083 :     struct sockaddr_in6* addr6 = (struct sockaddr_in6*) so;
    1238   [ +  -  +  -  :       2083 :     if (IN6_IS_ADDR_V4MAPPED(&addr6->sin6_addr)) {
                   -  + ]
    1239                 :       2083 :       struct sockaddr_in addr4;
    1240                 :       2083 :       memset (&addr4, 0, sizeof(addr4));
    1241                 :       2083 :       addr4.sin_family = AF_INET;
    1242                 :       2083 :       addr4.sin_port = addr6->sin6_port;
    1243                 :       2083 :       memcpy (&addr4.sin_addr.s_addr, addr6->sin6_addr.s6_addr+12, sizeof(addr4.sin_addr.s_addr));
    1244                 :       2083 :       sts = getnameinfo ((struct sockaddr*) &addr4, sizeof (addr4),
    1245                 :            :                          hostname, sizeof (hostname),
    1246                 :            :                          servname, sizeof (servname),
    1247                 :            :                          NI_NUMERICHOST | NI_NUMERICSERV);
    1248                 :            :     } else {
    1249                 :          0 :       sts = getnameinfo (so, sizeof (struct sockaddr_in6),
    1250                 :            :                          hostname, sizeof (hostname),
    1251                 :            :                          servname, sizeof (servname),
    1252                 :            :                          NI_NUMERICHOST | NI_NUMERICSERV);
    1253                 :            :     }
    1254                 :            :   }
    1255                 :            :   
    1256         [ -  + ]:       2083 :   if (sts != 0) {
    1257                 :          0 :     hostname[0] = servname[0] = '\0';
    1258                 :            :   }
    1259                 :            : 
    1260                 :            :   // extract headers relevant to administration
    1261         [ -  + ]:       2083 :   const char* user_agent = MHD_lookup_connection_value (conn, MHD_HEADER_KIND, "User-Agent") ?: "";
    1262         [ +  + ]:       2083 :   const char* x_forwarded_for = MHD_lookup_connection_value (conn, MHD_HEADER_KIND, "X-Forwarded-For") ?: "";
    1263                 :            :   // NB: these are untrustworthy, beware if machine-processing log files
    1264                 :            : 
    1265   [ +  -  +  -  :       6249 :   return string(hostname) + string(":") + string(servname) +
          +  -  +  -  +  
          -  +  -  -  +  
          -  +  -  +  -  
          +  -  +  -  +  
          -  -  -  -  -  
                      - ]
    1266   [ +  -  +  -  :       8636 :     string(" UA:") + header_censor(string(user_agent)) +
          +  -  +  -  +  
          -  -  +  +  +  
          -  +  +  +  -  
             +  -  -  -  
                      - ]
    1267   [ +  -  +  -  :       6261 :     string(" XFF:") + header_censor(string(x_forwarded_for));
          +  -  +  +  +  
                +  -  - ]
    1268                 :            : }
    1269                 :            : 
    1270                 :            : 
    1271                 :            : 
    1272                 :            : ////////////////////////////////////////////////////////////////////////
    1273                 :            : 
    1274                 :            : /* Wrapper for MHD_add_response_header that logs an error if we
    1275                 :            :    couldn't add the specified header.  */
    1276                 :            : static void
    1277                 :       6059 : add_mhd_response_header (struct MHD_Response *r,
    1278                 :            :                          const char *h, const char *v)
    1279                 :            : {
    1280         [ -  + ]:       6059 :   if (MHD_add_response_header (r, h, v) == MHD_NO)
    1281   [ #  #  #  #  :          0 :     obatched(clog) << "Error: couldn't add '" << h << "' header" << endl;
                   #  # ]
    1282                 :       6059 : }
    1283                 :            : 
    1284                 :            : static void
    1285                 :        802 : add_mhd_last_modified (struct MHD_Response *resp, time_t mtime)
    1286                 :            : {
    1287                 :        802 :   struct tm now;
    1288                 :        802 :   struct tm *nowp = gmtime_r (&mtime, &now);
    1289         [ +  - ]:        802 :   if (nowp != NULL)
    1290                 :            :     {
    1291                 :        802 :       char datebuf[80];
    1292                 :        802 :       size_t rc = strftime (datebuf, sizeof (datebuf), "%a, %d %b %Y %T GMT",
    1293                 :            :                             nowp);
    1294         [ +  - ]:        802 :       if (rc > 0 && rc < sizeof (datebuf))
    1295                 :        802 :         add_mhd_response_header (resp, "Last-Modified", datebuf);
    1296                 :            :     }
    1297                 :            : 
    1298                 :        802 :   add_mhd_response_header (resp, "Cache-Control", "public");
    1299                 :        802 : }
    1300                 :            : 
    1301                 :            : // quote all questionable characters of str for safe passage through a sh -c expansion.
    1302                 :            : static string
    1303                 :        560 : shell_escape(const string& str)
    1304                 :            : {
    1305                 :        560 :   string y;
    1306         [ +  + ]:      78876 :   for (auto&& x : str)
    1307                 :            :     {
    1308   [ +  +  +  + ]:      78316 :       if (! isalnum(x) && x != '/')
    1309         [ +  - ]:       6622 :         y += "\\";
    1310         [ +  - ]:     156632 :       y += x;
    1311                 :            :     }
    1312                 :        560 :   return y;
    1313                 :          0 : }
    1314                 :            : 
    1315                 :            : 
    1316                 :            : // PR25548: Perform POSIX / RFC3986 style path canonicalization on the input string.
    1317                 :            : //
    1318                 :            : // Namely:
    1319                 :            : //    //         ->   /
    1320                 :            : //    /foo/../   ->   /
    1321                 :            : //    /./        ->   /
    1322                 :            : //
    1323                 :            : // This mapping is done on dwarf-side source path names, which may
    1324                 :            : // include these constructs, so we can deal with debuginfod clients
    1325                 :            : // that accidentally canonicalize the paths.
    1326                 :            : //
    1327                 :            : // realpath(3) is close but not quite right, because it also resolves
    1328                 :            : // symbolic links.  Symlinks at the debuginfod server have nothing to
    1329                 :            : // do with the build-time symlinks, thus they must not be considered.
    1330                 :            : //
    1331                 :            : // see also curl Curl_dedotdotify() aka RFC3986, which we mostly follow here
    1332                 :            : // see also libc __realpath()
    1333                 :            : // see also llvm llvm::sys::path::remove_dots()
    1334                 :            : static string
    1335                 :       3558 : canon_pathname (const string& input)
    1336                 :            : {
    1337                 :       3558 :   string i = input; // 5.2.4 (1)
    1338                 :       3558 :   string o;
    1339                 :            : 
    1340                 :      33248 :   while (i.size() != 0)
    1341                 :            :     {
    1342                 :            :       // 5.2.4 (2) A
    1343   [ +  -  -  +  :      59380 :       if (i.substr(0,3) == "../")
                   -  + ]
    1344   [ #  #  #  # ]:          0 :         i = i.substr(3);
    1345   [ +  -  -  +  :      59380 :       else if(i.substr(0,2) == "./")
                   -  + ]
    1346   [ #  #  #  # ]:          0 :         i = i.substr(2);
    1347                 :            : 
    1348                 :            :       // 5.2.4 (2) B
    1349   [ +  -  -  +  :      59380 :       else if (i.substr(0,3) == "/./")
                   +  + ]
    1350   [ +  -  +  + ]:        622 :         i = i.substr(2);
    1351         [ -  + ]:      29308 :       else if (i == "/.")
    1352         [ #  # ]:          0 :         i = ""; // no need to handle "/." complete-path-segment case; we're dealing with file names
    1353                 :            : 
    1354                 :            :       // 5.2.4 (2) C
    1355   [ +  -  -  +  :      58616 :       else if (i.substr(0,4) == "/../") {
                   +  + ]
    1356   [ +  -  +  + ]:        472 :         i = i.substr(3);
    1357                 :        472 :         string::size_type sl = o.rfind("/");
    1358         [ +  - ]:        472 :         if (sl != string::npos)
    1359   [ +  -  +  - ]:        944 :           o = o.substr(0, sl);
    1360                 :            :         else
    1361         [ #  # ]:          0 :           o = "";
    1362         [ -  + ]:      28836 :       } else if (i == "/..")
    1363         [ #  # ]:          0 :         i = ""; // no need to handle "/.." complete-path-segment case; we're dealing with file names
    1364                 :            : 
    1365                 :            :       // 5.2.4 (2) D
    1366                 :            :       // no need to handle these cases; we're dealing with file names
    1367         [ -  + ]:      28836 :       else if (i == ".")
    1368         [ #  # ]:          0 :         i = "";
    1369         [ -  + ]:      28836 :       else if (i == "..")
    1370         [ #  # ]:          0 :         i = "";
    1371                 :            : 
    1372                 :            :       // POSIX special: map // to /
    1373   [ +  -  -  +  :      57672 :       else if (i.substr(0,2) == "//")
                   +  + ]
    1374   [ +  -  +  + ]:        152 :         i = i.substr(1);
    1375                 :            : 
    1376                 :            :       // 5.2.4 (2) E
    1377                 :            :       else {
    1378         [ -  + ]:      28700 :         string::size_type next_slash = i.find("/", (i[0]=='/' ? 1 : 0)); // skip first slash
    1379   [ +  -  +  + ]:      57400 :         o += i.substr(0, next_slash);
    1380         [ +  + ]:      28700 :         if (next_slash == string::npos)
    1381   [ +  -  +  + ]:      36806 :           i = "";
    1382                 :            :         else
    1383   [ +  -  +  +  :      47392 :           i = i.substr(next_slash);
                   -  - ]
    1384                 :            :       }
    1385                 :            :     }
    1386                 :            : 
    1387         [ +  - ]:       3558 :   return o;
    1388                 :       3558 : }
    1389                 :            : 
    1390                 :            : 
    1391                 :            : // Estimate available free space for a given filesystem via statfs(2).
    1392                 :            : // Return true if the free fraction is known to be smaller than the
    1393                 :            : // given minimum percentage.  Also update a related metric.
    1394                 :       3908 : bool statfs_free_enough_p(const string& path, const string& label, long minfree = 0)
    1395                 :            : {
    1396                 :       3908 :   struct statfs sfs;
    1397                 :       3908 :   int rc = statfs(path.c_str(), &sfs);
    1398         [ +  + ]:       3908 :   if (rc == 0)
    1399                 :            :     {
    1400                 :       3858 :       double s = (double) sfs.f_bavail / (double) sfs.f_blocks;
    1401   [ +  -  +  -  :       7716 :       set_metric("filesys_free_ratio","purpose",label, s);
             -  +  -  - ]
    1402                 :       3858 :       return ((s * 100.0) < minfree);
    1403                 :            :     }
    1404                 :            :   return false;
    1405                 :            : }
    1406                 :            : 
    1407                 :            : 
    1408                 :            : 
    1409                 :            : // A map-like class that owns a cache of file descriptors (indexed by
    1410                 :            : // file / content names).
    1411                 :            : //
    1412                 :            : // If only it could use fd's instead of file names ... but we can't
    1413                 :            : // dup(2) to create independent descriptors for the same unlinked
    1414                 :            : // files, so would have to use some goofy linux /proc/self/fd/%d
    1415                 :            : // hack such as the following
    1416                 :            : 
    1417                 :            : #if 0
    1418                 :            : int superdup(int fd)
    1419                 :            : {
    1420                 :            : #ifdef __linux__
    1421                 :            :   char *fdpath = NULL;
    1422                 :            :   int rc = asprintf(& fdpath, "/proc/self/fd/%d", fd);
    1423                 :            :   int newfd;
    1424                 :            :   if (rc >= 0)
    1425                 :            :     newfd = open(fdpath, O_RDONLY);
    1426                 :            :   else
    1427                 :            :     newfd = -1;
    1428                 :            :   free (fdpath);
    1429                 :            :   return newfd;
    1430                 :            : #else
    1431                 :            :   return -1;
    1432                 :            : #endif
    1433                 :            : }
    1434                 :            : #endif
    1435                 :            : 
    1436                 :            : class libarchive_fdcache
    1437                 :            : {
    1438                 :            : private:
    1439                 :            :   mutex fdcache_lock;
    1440                 :            : 
    1441                 :            :   struct fdcache_entry
    1442                 :            :   {
    1443                 :            :     string archive;
    1444                 :            :     string entry;
    1445                 :            :     string fd;
    1446                 :            :     double fd_size_mb; // slightly rounded up megabytes
    1447                 :            :   };
    1448                 :            :   deque<fdcache_entry> lru; // @head: most recently used
    1449                 :            :   long max_fds;
    1450                 :            :   deque<fdcache_entry> prefetch; // prefetched
    1451                 :            :   long max_mbs;
    1452                 :            :   long max_prefetch_mbs;
    1453                 :            :   long max_prefetch_fds;
    1454                 :            : 
    1455                 :            : public:
    1456                 :       2166 :   void set_metrics()
    1457                 :            :   {
    1458                 :       2166 :     double fdcache_mb = 0.0;
    1459                 :       2166 :     double prefetch_mb = 0.0;
    1460   [ +  +  +  + ]:       7872 :     for (auto i = lru.begin(); i < lru.end(); i++)
    1461                 :       3540 :       fdcache_mb += i->fd_size_mb;
    1462   [ +  +  +  + ]:       5478 :     for (auto j = prefetch.begin(); j < prefetch.end(); j++)
    1463                 :       1146 :       prefetch_mb += j->fd_size_mb;
    1464         [ +  - ]:       2166 :     set_metric("fdcache_bytes", fdcache_mb*1024.0*1024.0);
    1465         [ +  - ]:       2166 :     set_metric("fdcache_count", lru.size());
    1466         [ +  - ]:       2166 :     set_metric("fdcache_prefetch_bytes", prefetch_mb*1024.0*1024.0);
    1467         [ +  - ]:       2166 :     set_metric("fdcache_prefetch_count", prefetch.size());
    1468                 :       2166 :   }
    1469                 :            : 
    1470                 :       1218 :   void intern(const string& a, const string& b, string fd, off_t sz, bool front_p)
    1471                 :            :   {
    1472                 :       1218 :     {
    1473                 :       1218 :       unique_lock<mutex> lock(fdcache_lock);
    1474                 :            :       // nuke preexisting copy
    1475   [ +  +  +  + ]:       4788 :       for (auto i = lru.begin(); i < lru.end(); i++)
    1476                 :            :         {
    1477   [ +  +  -  + ]:       1176 :           if (i->archive == a && i->entry == b)
    1478                 :            :             {
    1479                 :          0 :               unlink (i->fd.c_str());
    1480                 :          0 :               lru.erase(i);
    1481   [ #  #  #  #  :          0 :               inc_metric("fdcache_op_count","op","dequeue");
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1482                 :          0 :               break; // must not continue iterating
    1483                 :            :             }
    1484                 :            :         }
    1485                 :            :       // nuke preexisting copy in prefetch
    1486   [ +  +  +  + ]:       3536 :       for (auto i = prefetch.begin(); i < prefetch.end(); i++)
    1487                 :            :         {
    1488   [ +  +  +  - ]:        550 :           if (i->archive == a && i->entry == b)
    1489                 :            :             {
    1490                 :          0 :               unlink (i->fd.c_str());
    1491                 :          0 :               prefetch.erase(i);
    1492   [ #  #  #  #  :          0 :               inc_metric("fdcache_op_count","op","prefetch_dequeue");
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1493                 :          0 :               break; // must not continue iterating
    1494                 :            :             }
    1495                 :            :         }
    1496                 :       1218 :       double mb = (sz+65535)/1048576.0; // round up to 64K block
    1497   [ +  -  +  -  :       1218 :       fdcache_entry n = { a, b, fd, mb };
                   +  - ]
    1498         [ +  + ]:       1218 :       if (front_p)
    1499                 :            :         {
    1500   [ +  -  +  -  :       1332 :           inc_metric("fdcache_op_count","op","enqueue");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    1501         [ +  - ]:        666 :           lru.push_front(n);
    1502                 :            :         }
    1503                 :            :       else
    1504                 :            :         {
    1505   [ +  -  +  -  :       1104 :           inc_metric("fdcache_op_count","op","prefetch_enqueue");
          +  -  +  -  -  
          +  +  -  -  -  
                   -  - ]
    1506         [ +  - ]:        552 :           prefetch.push_front(n);
    1507                 :            :         }
    1508         [ +  + ]:       1218 :       if (verbose > 3)
    1509   [ +  -  +  - ]:       3564 :         obatched(clog) << "fdcache interned a=" << a << " b=" << b
    1510   [ +  -  +  -  :       1188 :                        << " fd=" << fd << " mb=" << mb << " front=" << front_p << endl;
          +  -  +  -  +  
          -  +  -  +  -  
             +  -  +  - ]
    1511                 :            :       
    1512         [ +  - ]:       1218 :       set_metrics();
    1513                 :       1218 :     }
    1514                 :            : 
    1515                 :            :     // NB: we age the cache at lookup time too
    1516   [ +  -  -  +  :       1218 :     if (statfs_free_enough_p(tmpdir, "tmpdir", fdcache_mintmp))
                   -  + ]
    1517                 :            :       {
    1518   [ #  #  #  #  :          0 :         inc_metric("fdcache_op_count","op","emerg-flush");
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    1519         [ #  # ]:          0 :         obatched(clog) << "fdcache emergency flush for filling tmpdir" << endl;
    1520                 :          0 :         this->limit(0, 0, 0, 0); // emergency flush
    1521                 :            :       }
    1522         [ +  + ]:       1218 :     else if (front_p)
    1523                 :        666 :       this->limit(max_fds, max_mbs, max_prefetch_fds, max_prefetch_mbs); // age cache if required
    1524                 :       1218 :   }
    1525                 :            : 
    1526                 :        740 :   int lookup(const string& a, const string& b)
    1527                 :            :   {
    1528                 :        740 :     int fd = -1;
    1529                 :        740 :     {
    1530                 :        740 :       unique_lock<mutex> lock(fdcache_lock);
    1531   [ +  +  +  + ]:       4008 :       for (auto i = lru.begin(); i < lru.end(); i++)
    1532                 :            :         {
    1533   [ +  +  +  + ]:       1320 :           if (i->archive == a && i->entry == b)
    1534                 :            :             { // found it; move it to head of lru
    1535         [ +  - ]:         56 :               fdcache_entry n = *i;
    1536                 :         56 :               lru.erase(i); // invalidates i, so no more iteration!
    1537         [ +  - ]:         56 :               lru.push_front(n);
    1538   [ +  -  +  -  :        112 :               inc_metric("fdcache_op_count","op","requeue_front");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    1539         [ +  - ]:         56 :               fd = open(n.fd.c_str(), O_RDONLY); 
    1540                 :         56 :               break;
    1541                 :         56 :             }
    1542                 :            :         }
    1543                 :            :       // Iterate through prefetch while fd == -1 to ensure that no duplication between lru and 
    1544                 :            :       // prefetch occurs.
    1545   [ +  +  +  +  :       2492 :       for ( auto i = prefetch.begin(); fd == -1 && i < prefetch.end(); ++i)
                   +  + ]
    1546                 :            :         {
    1547   [ +  +  +  + ]:        548 :           if (i->archive == a && i->entry == b)
    1548                 :            :             { // found it; take the entry from the prefetch deque to the lru deque, since it has now been accessed.
    1549         [ +  - ]:         14 :               fdcache_entry n = *i;
    1550                 :         14 :               prefetch.erase(i);
    1551         [ +  - ]:         14 :               lru.push_front(n);
    1552   [ +  -  +  -  :         28 :               inc_metric("fdcache_op_count","op","prefetch_access");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    1553         [ +  - ]:         14 :               fd = open(n.fd.c_str(), O_RDONLY); 
    1554                 :         14 :               break;
    1555                 :         14 :             }
    1556                 :            :         }
    1557                 :          0 :     }
    1558                 :            : 
    1559   [ +  -  -  +  :        740 :     if (statfs_free_enough_p(tmpdir, "tmpdir", fdcache_mintmp))
                   -  + ]
    1560                 :            :       {
    1561   [ #  #  #  #  :          0 :         inc_metric("fdcache_op_count","op","emerg-flush");
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    1562         [ #  # ]:          0 :         obatched(clog) << "fdcache emergency flush for filling tmpdir" << endl;
    1563                 :          0 :         this->limit(0, 0, 0, 0); // emergency flush
    1564                 :            :       }
    1565         [ +  + ]:        740 :     else if (fd >= 0)
    1566                 :         70 :       this->limit(max_fds, max_mbs, max_prefetch_fds, max_prefetch_mbs); // age cache if required
    1567                 :            : 
    1568                 :        740 :     return fd;
    1569                 :            :   }
    1570                 :            : 
    1571                 :       1236 :   int probe(const string& a, const string& b) // just a cache residency check - don't modify LRU state, don't open
    1572                 :            :   {
    1573                 :       1236 :     unique_lock<mutex> lock(fdcache_lock);
    1574   [ +  +  +  + ]:       4948 :     for (auto i = lru.begin(); i < lru.end(); i++)
    1575                 :            :       {
    1576   [ +  +  +  + ]:       1264 :         if (i->archive == a && i->entry == b)
    1577                 :            :           {
    1578   [ +  -  +  -  :         52 :             inc_metric("fdcache_op_count","op","probe_hit");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    1579                 :         26 :             return true;
    1580                 :            :           }
    1581                 :            :       }
    1582   [ +  +  +  + ]:       3512 :     for (auto i = prefetch.begin(); i < prefetch.end(); i++)
    1583                 :            :       {
    1584   [ +  +  +  - ]:        546 :         if (i->archive == a && i->entry == b)
    1585                 :            :           {
    1586   [ #  #  #  #  :          0 :             inc_metric("fdcache_op_count","op","prefetch_probe_hit");
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1587                 :          0 :             return true;
    1588                 :            :           }
    1589                 :            :       }
    1590   [ +  -  +  -  :       2420 :     inc_metric("fdcache_op_count","op","probe_miss");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    1591                 :       1210 :     return false;
    1592                 :       1236 :   }
    1593                 :            : 
    1594                 :          0 :   void clear(const string& a, const string& b)
    1595                 :            :   {
    1596                 :          0 :     unique_lock<mutex> lock(fdcache_lock);
    1597   [ #  #  #  # ]:          0 :     for (auto i = lru.begin(); i < lru.end(); i++)
    1598                 :            :       {
    1599   [ #  #  #  # ]:          0 :         if (i->archive == a && i->entry == b)
    1600                 :            :           { // found it; erase it from lru
    1601         [ #  # ]:          0 :             fdcache_entry n = *i;
    1602                 :          0 :             lru.erase(i); // invalidates i, so no more iteration!
    1603   [ #  #  #  #  :          0 :             inc_metric("fdcache_op_count","op","clear");
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1604                 :          0 :             unlink (n.fd.c_str());
    1605         [ #  # ]:          0 :             set_metrics();
    1606                 :          0 :             return;
    1607                 :          0 :           }
    1608                 :            :       }
    1609   [ #  #  #  # ]:          0 :     for (auto i = prefetch.begin(); i < prefetch.end(); i++)
    1610                 :            :       {
    1611   [ #  #  #  # ]:          0 :         if (i->archive == a && i->entry == b)
    1612                 :            :           { // found it; erase it from lru
    1613         [ #  # ]:          0 :             fdcache_entry n = *i;
    1614                 :          0 :             prefetch.erase(i); // invalidates i, so no more iteration!
    1615   [ #  #  #  #  :          0 :             inc_metric("fdcache_op_count","op","prefetch_clear");
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    1616                 :          0 :             unlink (n.fd.c_str());
    1617         [ #  # ]:          0 :             set_metrics();
    1618                 :          0 :             return;
    1619                 :          0 :           }
    1620                 :            :       }
    1621                 :          0 :   }
    1622                 :            : 
    1623                 :       1020 :   void limit(long maxfds, long maxmbs, long maxprefetchfds, long maxprefetchmbs , bool metrics_p = true)
    1624                 :            :   {
    1625   [ +  +  +  +  :       1020 :     if (verbose > 3 && (this->max_fds != maxfds || this->max_mbs != maxmbs))
                   +  + ]
    1626   [ +  -  +  -  :        376 :       obatched(clog) << "fdcache limited to maxfds=" << maxfds << " maxmbs=" << maxmbs << endl;
             +  -  +  - ]
    1627                 :            : 
    1628                 :       1020 :     unique_lock<mutex> lock(fdcache_lock);
    1629                 :       1020 :     this->max_fds = maxfds;
    1630                 :       1020 :     this->max_mbs = maxmbs;
    1631                 :       1020 :     this->max_prefetch_fds = maxprefetchfds;
    1632                 :       1020 :     this->max_prefetch_mbs = maxprefetchmbs;
    1633                 :       1020 :     long total_fd = 0;
    1634                 :       1020 :     double total_mb = 0.0;
    1635   [ +  +  +  + ]:       5436 :     for (auto i = lru.begin(); i < lru.end(); i++)
    1636                 :            :       {
    1637                 :            :         // accumulate totals from most recently used one going backward
    1638                 :       2240 :         total_fd ++;
    1639         [ +  + ]:       2240 :         total_mb += i->fd_size_mb;
    1640   [ +  +  +  + ]:       2240 :         if (total_fd > this->max_fds || total_mb > this->max_mbs)
    1641                 :            :           {
    1642                 :            :             // found the cut here point!
    1643                 :            : 
    1644   [ +  +  +  + ]:       2444 :             for (auto j = i; j < lru.end(); j++) // close all the fds from here on in
    1645                 :            :               {
    1646         [ +  + ]:        680 :                 if (verbose > 3)
    1647   [ +  -  +  - ]:       2004 :                   obatched(clog) << "fdcache evicted a=" << j->archive << " b=" << j->entry
    1648   [ +  -  +  -  :        668 :                                  << " fd=" << j->fd << " mb=" << j->fd_size_mb << endl;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1649         [ +  + ]:        680 :                 if (metrics_p)
    1650   [ +  -  +  -  :       1120 :                   inc_metric("fdcache_op_count","op","evict");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    1651                 :        680 :                 unlink (j->fd.c_str());
    1652                 :            :               }
    1653                 :            : 
    1654                 :        542 :             lru.erase(i, lru.end()); // erase the nodes generally
    1655                 :        542 :             break;
    1656                 :            :           }
    1657                 :            :       }
    1658                 :       1020 :     total_fd = 0;
    1659                 :       1020 :     total_mb = 0.0;
    1660   [ +  +  +  + ]:       2128 :     for(auto i = prefetch.begin(); i < prefetch.end(); i++){
    1661                 :            :       // accumulate totals from most recently used one going backward
    1662                 :        568 :         total_fd ++;
    1663         [ +  + ]:        568 :         total_mb += i->fd_size_mb;
    1664   [ +  +  +  + ]:        568 :         if (total_fd > this->max_prefetch_fds || total_mb > this->max_prefetch_mbs)
    1665                 :            :           {
    1666                 :            :             // found the cut here point!
    1667   [ +  +  +  + ]:       2124 :             for (auto j = i; j < prefetch.end(); j++) // close all the fds from here on in
    1668                 :            :               {
    1669         [ +  + ]:        538 :                 if (verbose > 3)
    1670   [ +  -  +  - ]:       1560 :                   obatched(clog) << "fdcache evicted from prefetch a=" << j->archive << " b=" << j->entry
    1671   [ +  -  +  -  :        520 :                                  << " fd=" << j->fd << " mb=" << j->fd_size_mb << endl;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    1672         [ +  + ]:        538 :                 if (metrics_p)
    1673   [ +  -  +  -  :       1012 :                   inc_metric("fdcache_op_count","op","prefetch_evict");
          +  -  +  -  -  
          +  -  +  -  -  
             -  -  -  - ]
    1674                 :        538 :                 unlink (j->fd.c_str());
    1675                 :            :               }
    1676                 :            : 
    1677                 :        524 :             prefetch.erase(i, prefetch.end()); // erase the nodes generally
    1678                 :        524 :             break;
    1679                 :            :           }
    1680                 :            :     }
    1681   [ +  +  +  - ]:       1020 :     if (metrics_p) set_metrics();
    1682                 :       1020 :   }
    1683                 :            : 
    1684                 :            : 
    1685                 :         72 :   ~libarchive_fdcache()
    1686                 :            :   {
    1687                 :            :     // unlink any fdcache entries in $TMPDIR
    1688                 :            :     // don't update metrics; those globals may be already destroyed
    1689                 :         72 :     limit(0, 0, 0, 0, false);
    1690                 :         72 :   }
    1691                 :            : };
    1692                 :            : static libarchive_fdcache fdcache;
    1693                 :            : 
    1694                 :            : /* Search ELF_FD for an ELF/DWARF section with name SECTION.
    1695                 :            :    If found copy the section to a temporary file and return
    1696                 :            :    its file descriptor, otherwise return -1.
    1697                 :            : 
    1698                 :            :    The temporary file's mtime will be set to PARENT_MTIME.
    1699                 :            :    B_SOURCE should be a description of the parent file suitable
    1700                 :            :    for printing to the log.  */
    1701                 :            : 
    1702                 :            : static int
    1703                 :         12 : extract_section (int elf_fd, int64_t parent_mtime,
    1704                 :            :                  const string& b_source, const string& section)
    1705                 :            : {
    1706                 :            :   /* Search the fdcache.  */
    1707                 :         12 :   struct stat fs;
    1708                 :         12 :   int fd = fdcache.lookup (b_source, section);
    1709         [ -  + ]:         12 :   if (fd >= 0)
    1710                 :            :     {
    1711         [ #  # ]:          0 :       if (fstat (fd, &fs) != 0)
    1712                 :            :         {
    1713         [ #  # ]:          0 :           if (verbose)
    1714         [ #  # ]:          0 :             obatched (clog) << "cannot fstate fdcache "
    1715   [ #  #  #  #  :          0 :                             << b_source << " " << section << endl;
                   #  # ]
    1716                 :          0 :           close (fd);
    1717                 :          0 :           return -1;
    1718                 :            :         }
    1719         [ #  # ]:          0 :       if ((int64_t) fs.st_mtime != parent_mtime)
    1720                 :            :         {
    1721         [ #  # ]:          0 :           if (verbose)
    1722         [ #  # ]:          0 :             obatched(clog) << "mtime mismatch for "
    1723   [ #  #  #  #  :          0 :                            << b_source << " " << section << endl;
                   #  # ]
    1724                 :          0 :           close (fd);
    1725                 :          0 :           return -1;
    1726                 :            :         }
    1727                 :            :       /* Success.  */
    1728                 :            :       return fd;
    1729                 :            :     }
    1730                 :            : 
    1731                 :         12 :   Elf *elf = elf_begin (elf_fd, ELF_C_READ_MMAP_PRIVATE, NULL);
    1732         [ -  + ]:         12 :   if (elf == NULL)
    1733                 :            :     return -1;
    1734                 :            : 
    1735                 :            :   /* Try to find the section and copy the contents into a separate file.  */
    1736                 :         12 :   try
    1737                 :            :     {
    1738                 :         12 :       size_t shstrndx;
    1739         [ +  - ]:         12 :       int rc = elf_getshdrstrndx (elf, &shstrndx);
    1740         [ -  + ]:         12 :       if (rc < 0)
    1741   [ #  #  #  # ]:          0 :         throw elfutils_exception (rc, "getshdrstrndx");
    1742                 :            : 
    1743                 :            :       Elf_Scn *scn = NULL;
    1744                 :        432 :       while (true)
    1745                 :            :         {
    1746         [ +  - ]:        222 :           scn = elf_nextscn (elf, scn);
    1747         [ +  - ]:        222 :           if (scn == NULL)
    1748                 :            :             break;
    1749                 :        222 :           GElf_Shdr shdr_storage;
    1750         [ +  - ]:        222 :           GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_storage);
    1751         [ +  - ]:        222 :           if (shdr == NULL)
    1752                 :            :             break;
    1753                 :            : 
    1754         [ +  - ]:        222 :           const char *scn_name = elf_strptr (elf, shstrndx, shdr->sh_name);
    1755         [ +  - ]:        222 :           if (scn_name == NULL)
    1756                 :            :             break;
    1757         [ +  + ]:        222 :           if (scn_name == section)
    1758                 :            :             {
    1759                 :         12 :               Elf_Data *data = NULL;
    1760                 :            : 
    1761                 :            :               /* We found the desired section.  */
    1762         [ +  - ]:         12 :               data = elf_rawdata (scn, NULL);
    1763         [ -  + ]:         12 :               if (data == NULL)
    1764   [ #  #  #  #  :          0 :                 throw elfutils_exception (elf_errno (), "elfraw_data");
                   #  # ]
    1765         [ +  + ]:         12 :               if (data->d_buf == NULL)
    1766                 :            :                 {
    1767   [ +  -  +  - ]:          8 :                   obatched(clog) << "section " << section
    1768   [ +  -  +  - ]:          4 :                                  << " is empty" << endl;
    1769                 :          4 :                   break;
    1770                 :            :                 }
    1771                 :            : 
    1772                 :            :               /* Create temporary file containing the section.  */
    1773                 :          8 :               char *tmppath = NULL;
    1774                 :          8 :               rc = asprintf (&tmppath, "%s/debuginfod.XXXXXX", tmpdir.c_str());
    1775         [ -  + ]:          8 :               if (rc < 0)
    1776   [ #  #  #  # ]:          0 :                 throw libc_exception (ENOMEM, "cannot allocate tmppath");
    1777                 :          8 :               defer_dtor<void*,void> tmmpath_freer (tmppath, free);
    1778         [ +  - ]:          8 :               fd = mkstemp (tmppath);
    1779         [ -  + ]:          8 :               if (fd < 0)
    1780   [ #  #  #  # ]:          0 :                 throw libc_exception (errno, "cannot create temporary file");
    1781         [ +  - ]:          8 :               ssize_t res = write_retry (fd, data->d_buf, data->d_size);
    1782   [ +  -  -  + ]:          8 :               if (res < 0 || (size_t) res != data->d_size)
    1783   [ #  #  #  # ]:          0 :                 throw libc_exception (errno, "cannot write to temporary file");
    1784                 :            : 
    1785                 :            :               /* Set mtime to be the same as the parent file's mtime.  */
    1786                 :          8 :               struct timespec tvs[2];
    1787         [ -  + ]:          8 :               if (fstat (elf_fd, &fs) != 0)
    1788   [ #  #  #  # ]:          0 :                 throw libc_exception (errno, "cannot fstat file");
    1789                 :            : 
    1790                 :          8 :               tvs[0].tv_sec = 0;
    1791                 :          8 :               tvs[0].tv_nsec = UTIME_OMIT;
    1792                 :          8 :               tvs[1] = fs.st_mtim;
    1793                 :          8 :               (void) futimens (fd, tvs);
    1794                 :            : 
    1795                 :            :               /* Add to fdcache.  */
    1796   [ +  -  +  - ]:          8 :               fdcache.intern (b_source, section, tmppath, data->d_size, true);
    1797                 :          8 :               break;
    1798                 :         12 :             }
    1799                 :        210 :         }
    1800                 :            :     }
    1801         [ -  - ]:          0 :   catch (const reportable_exception &e)
    1802                 :            :     {
    1803         [ -  - ]:          0 :       e.report (clog);
    1804         [ -  - ]:          0 :       close (fd);
    1805                 :          0 :       fd = -1;
    1806                 :          0 :     }
    1807                 :            : 
    1808                 :         12 :   elf_end (elf);
    1809                 :            :   return fd;
    1810                 :            : }
    1811                 :            : 
    1812                 :            : static struct MHD_Response*
    1813                 :         74 : handle_buildid_f_match (bool internal_req_t,
    1814                 :            :                         int64_t b_mtime,
    1815                 :            :                         const string& b_source0,
    1816                 :            :                         const string& section,
    1817                 :            :                         int *result_fd)
    1818                 :            : {
    1819                 :         74 :   (void) internal_req_t; // ignored
    1820                 :         74 :   int fd = open(b_source0.c_str(), O_RDONLY);
    1821         [ -  + ]:         74 :   if (fd < 0)
    1822   [ #  #  #  #  :          0 :     throw libc_exception (errno, string("open ") + b_source0);
             #  #  #  # ]
    1823                 :            : 
    1824                 :            :   // NB: use manual close(2) in error case instead of defer_dtor, because
    1825                 :            :   // in the normal case, we want to hand the fd over to libmicrohttpd for
    1826                 :            :   // file transfer.
    1827                 :            : 
    1828                 :         74 :   struct stat s;
    1829                 :         74 :   int rc = fstat(fd, &s);
    1830         [ -  + ]:         74 :   if (rc < 0)
    1831                 :            :     {
    1832                 :          0 :       close(fd);
    1833   [ #  #  #  #  :          0 :       throw libc_exception (errno, string("fstat ") + b_source0);
             #  #  #  # ]
    1834                 :            :     }
    1835                 :            : 
    1836         [ -  + ]:         74 :   if ((int64_t) s.st_mtime != b_mtime)
    1837                 :            :     {
    1838         [ #  # ]:          0 :       if (verbose)
    1839   [ #  #  #  # ]:          0 :         obatched(clog) << "mtime mismatch for " << b_source0 << endl;
    1840                 :          0 :       close(fd);
    1841                 :          0 :       return 0;
    1842                 :            :     }
    1843                 :            : 
    1844         [ +  + ]:         74 :   if (!section.empty ())
    1845                 :            :     {
    1846                 :          6 :       int scn_fd = extract_section (fd, s.st_mtime, b_source0, section);
    1847                 :          6 :       close (fd);
    1848                 :            : 
    1849         [ +  + ]:          6 :       if (scn_fd >= 0)
    1850                 :          4 :         fd = scn_fd;
    1851                 :            :       else
    1852                 :            :         {
    1853         [ +  - ]:          2 :           if (verbose)
    1854         [ +  - ]:          6 :             obatched (clog) << "cannot find section " << section
    1855   [ +  -  +  -  :          2 :                             << " for " << b_source0 << endl;
                   +  - ]
    1856                 :          2 :           return 0;
    1857                 :            :         }
    1858                 :            : 
    1859                 :          4 :       rc = fstat(fd, &s);
    1860         [ -  + ]:          4 :       if (rc < 0)
    1861                 :            :         {
    1862                 :          0 :           close (fd);
    1863   [ #  #  #  #  :          0 :           throw libc_exception (errno, string ("fstat ") + b_source0
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    1864   [ #  #  #  #  :          0 :                                        + string (" ") + section);
          #  #  #  #  #  
                      # ]
    1865                 :            :         }
    1866                 :            :     }
    1867                 :            : 
    1868                 :         72 :   struct MHD_Response* r = MHD_create_response_from_fd ((uint64_t) s.st_size, fd);
    1869   [ +  -  +  -  :        144 :   inc_metric ("http_responses_total","result","file");
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    1870         [ -  + ]:         72 :   if (r == 0)
    1871                 :            :     {
    1872         [ #  # ]:          0 :       if (verbose)
    1873         [ #  # ]:          0 :         obatched(clog) << "cannot create fd-response for " << b_source0
    1874   [ #  #  #  #  :          0 :                        << " section=" << section << endl;
                   #  # ]
    1875                 :          0 :       close(fd);
    1876                 :            :     }
    1877                 :            :   else
    1878                 :            :     {
    1879                 :         72 :       add_mhd_response_header (r, "Content-Type", "application/octet-stream");
    1880         [ +  - ]:         72 :       add_mhd_response_header (r, "X-DEBUGINFOD-SIZE",
    1881                 :         72 :                                to_string(s.st_size).c_str());
    1882                 :         72 :       add_mhd_response_header (r, "X-DEBUGINFOD-FILE", b_source0.c_str());
    1883                 :         72 :       add_mhd_last_modified (r, s.st_mtime);
    1884         [ +  - ]:         72 :       if (verbose > 1)
    1885   [ +  -  +  -  :        144 :         obatched(clog) << "serving file " << b_source0 << " section=" << section << endl;
             +  -  +  - ]
    1886                 :            :       /* libmicrohttpd will close it. */
    1887         [ -  + ]:         72 :       if (result_fd)
    1888                 :         72 :         *result_fd = fd;
    1889                 :            :     }
    1890                 :            : 
    1891                 :            :   return r;
    1892                 :            : }
    1893                 :            : 
    1894                 :            : // For security/portability reasons, many distro-package archives have
    1895                 :            : // a "./" in front of path names; others have nothing, others have
    1896                 :            : // "/".  Canonicalize them all to a single leading "/", with the
    1897                 :            : // assumption that this matches the dwarf-derived file names too.
    1898                 :       3502 : string canonicalized_archive_entry_pathname(struct archive_entry *e)
    1899                 :            : {
    1900                 :       3502 :   string fn = archive_entry_pathname(e);
    1901         [ -  + ]:       3502 :   if (fn.size() == 0)
    1902                 :          0 :     return fn;
    1903         [ -  + ]:       3502 :   if (fn[0] == '/')
    1904                 :          0 :     return fn;
    1905         [ +  + ]:       3502 :   if (fn[0] == '.')
    1906         [ +  - ]:       2296 :     return fn.substr(1);
    1907                 :            :   else
    1908   [ +  -  +  -  :       2412 :     return string("/")+fn;
                   -  - ]
    1909                 :       3502 : }
    1910                 :            : 
    1911                 :            : 
    1912                 :            : 
    1913                 :            : static struct MHD_Response*
    1914                 :        786 : handle_buildid_r_match (bool internal_req_p,
    1915                 :            :                         int64_t b_mtime,
    1916                 :            :                         const string& b_source0,
    1917                 :            :                         const string& b_source1,
    1918                 :            :                         const string& section,
    1919                 :            :                         int *result_fd)
    1920                 :            : {
    1921                 :        786 :   struct stat fs;
    1922                 :        786 :   int rc = stat (b_source0.c_str(), &fs);
    1923         [ +  + ]:        786 :   if (rc != 0)
    1924   [ +  -  +  -  :        116 :     throw libc_exception (errno, string("stat ") + b_source0);
             +  -  -  + ]
    1925                 :            : 
    1926         [ -  + ]:        728 :   if ((int64_t) fs.st_mtime != b_mtime)
    1927                 :            :     {
    1928         [ #  # ]:          0 :       if (verbose)
    1929   [ #  #  #  # ]:          0 :         obatched(clog) << "mtime mismatch for " << b_source0 << endl;
    1930                 :          0 :       return 0;
    1931                 :            :     }
    1932                 :            : 
    1933                 :            :   // check for a match in the fdcache first
    1934                 :        728 :   int fd = fdcache.lookup(b_source0, b_source1);
    1935         [ +  + ]:        728 :   while (fd >= 0) // got one!; NB: this is really an if() with a possible branch out to the end
    1936                 :            :     {
    1937                 :         70 :       rc = fstat(fd, &fs);
    1938         [ -  + ]:         70 :       if (rc < 0) // disappeared?
    1939                 :            :         {
    1940         [ #  # ]:          0 :           if (verbose)
    1941   [ #  #  #  # ]:          0 :             obatched(clog) << "cannot fstat fdcache " << b_source0 << endl;
    1942                 :          0 :           close(fd);
    1943                 :          0 :           fdcache.clear(b_source0, b_source1);
    1944                 :            :           break; // branch out of if "loop", to try new libarchive fetch attempt
    1945                 :            :         }
    1946                 :            : 
    1947         [ +  + ]:         70 :       if (!section.empty ())
    1948                 :            :         {
    1949   [ +  -  +  - ]:          2 :           int scn_fd = extract_section (fd, fs.st_mtime,
    1950   [ +  -  -  + ]:          4 :                                         b_source0 + ":" + b_source1,
    1951                 :            :                                         section);
    1952                 :          2 :           close (fd);
    1953         [ -  + ]:          2 :           if (scn_fd >= 0)
    1954                 :          0 :             fd = scn_fd;
    1955                 :            :           else
    1956                 :            :             {
    1957         [ +  - ]:          2 :               if (verbose)
    1958         [ +  - ]:          6 :                 obatched (clog) << "cannot find section " << section
    1959                 :            :                                 << " for archive " << b_source0
    1960   [ +  -  +  -  :          2 :                                 << " file " << b_source1 << endl;
          +  -  +  -  +  
                      - ]
    1961                 :          2 :               return 0;
    1962                 :            :             }
    1963                 :            : 
    1964                 :          0 :           rc = fstat(fd, &fs);
    1965         [ #  # ]:          0 :           if (rc < 0)
    1966                 :            :             {
    1967                 :          0 :               close (fd);
    1968   [ #  #  #  # ]:          0 :               throw libc_exception (errno,
    1969   [ #  #  #  #  :          0 :                 string ("fstat archive ") + b_source0 + string (" file ") + b_source1
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    1970   [ #  #  #  #  :          0 :                 + string (" section ") + section);
          #  #  #  #  #  
                      # ]
    1971                 :            :             }
    1972                 :            :         }
    1973                 :            : 
    1974                 :         68 :       struct MHD_Response* r = MHD_create_response_from_fd (fs.st_size, fd);
    1975         [ -  + ]:         68 :       if (r == 0)
    1976                 :            :         {
    1977         [ #  # ]:          0 :           if (verbose)
    1978   [ #  #  #  # ]:          0 :             obatched(clog) << "cannot create fd-response for " << b_source0 << endl;
    1979                 :          0 :           close(fd);
    1980                 :            :           break; // branch out of if "loop", to try new libarchive fetch attempt
    1981                 :            :         }
    1982                 :            : 
    1983   [ +  -  +  -  :        136 :       inc_metric ("http_responses_total","result","archive fdcache");
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    1984                 :            : 
    1985                 :         68 :       add_mhd_response_header (r, "Content-Type", "application/octet-stream");
    1986         [ +  - ]:         68 :       add_mhd_response_header (r, "X-DEBUGINFOD-SIZE",
    1987                 :         68 :                                to_string(fs.st_size).c_str());
    1988                 :         68 :       add_mhd_response_header (r, "X-DEBUGINFOD-ARCHIVE", b_source0.c_str());
    1989                 :         68 :       add_mhd_response_header (r, "X-DEBUGINFOD-FILE", b_source1.c_str());
    1990                 :         68 :       add_mhd_last_modified (r, fs.st_mtime);
    1991         [ +  - ]:         68 :       if (verbose > 1)
    1992         [ +  - ]:        204 :         obatched(clog) << "serving fdcache archive " << b_source0
    1993                 :            :                        << " file " << b_source1
    1994   [ +  -  +  -  :         68 :                        << " section=" << section << endl;
          +  -  +  -  +  
                      - ]
    1995                 :            :       /* libmicrohttpd will close it. */
    1996         [ +  - ]:         68 :       if (result_fd)
    1997                 :         68 :         *result_fd = fd;
    1998                 :            :       return r;
    1999                 :            :       // NB: see, we never go around the 'loop' more than once
    2000                 :            :     }
    2001                 :            : 
    2002                 :            :   // no match ... grumble, must process the archive
    2003                 :        658 :   string archive_decoder = "/dev/null";
    2004   [ +  -  -  - ]:        658 :   string archive_extension = "";
    2005         [ +  + ]:       1858 :   for (auto&& arch : scan_archives)
    2006         [ +  + ]:       1200 :     if (string_endswith(b_source0, arch.first))
    2007                 :            :       {
    2008         [ +  - ]:        658 :         archive_extension = arch.first;
    2009         [ +  - ]:       1858 :         archive_decoder = arch.second;
    2010                 :            :       }
    2011                 :        658 :   FILE* fp;
    2012                 :        658 :   defer_dtor<FILE*,int>::dtor_fn dfn;
    2013         [ +  + ]:        658 :   if (archive_decoder != "cat")
    2014                 :            :     {
    2015   [ +  -  +  -  :       1056 :       string popen_cmd = archive_decoder + " " + shell_escape(b_source0);
          +  -  -  +  -  
                -  -  - ]
    2016         [ +  - ]:        528 :       fp = popen (popen_cmd.c_str(), "r"); // "e" O_CLOEXEC?
    2017                 :        528 :       dfn = pclose;
    2018         [ -  + ]:        528 :       if (fp == NULL)
    2019   [ #  #  #  #  :          0 :         throw libc_exception (errno, string("popen ") + popen_cmd);
             #  #  #  # ]
    2020                 :        528 :     }
    2021                 :            :   else
    2022                 :            :     {
    2023         [ +  - ]:        130 :       fp = fopen (b_source0.c_str(), "r");
    2024                 :        130 :       dfn = fclose;
    2025         [ -  + ]:        130 :       if (fp == NULL)
    2026   [ #  #  #  #  :          0 :         throw libc_exception (errno, string("fopen ") + b_source0);
             #  #  #  # ]
    2027                 :            :     }
    2028                 :        658 :   defer_dtor<FILE*,int> fp_closer (fp, dfn);
    2029                 :            : 
    2030                 :        658 :   struct archive *a;
    2031         [ +  - ]:        658 :   a = archive_read_new();
    2032         [ -  + ]:        658 :   if (a == NULL)
    2033   [ #  #  #  # ]:          0 :     throw archive_exception("cannot create archive reader");
    2034                 :        658 :   defer_dtor<struct archive*,int> archive_closer (a, archive_read_free);
    2035                 :            : 
    2036         [ +  - ]:        658 :   rc = archive_read_support_format_all(a);
    2037         [ -  + ]:        658 :   if (rc != ARCHIVE_OK)
    2038   [ #  #  #  # ]:          0 :     throw archive_exception(a, "cannot select all format");
    2039         [ +  - ]:        658 :   rc = archive_read_support_filter_all(a);
    2040         [ -  + ]:        658 :   if (rc != ARCHIVE_OK)
    2041   [ #  #  #  # ]:          0 :     throw archive_exception(a, "cannot select all filters");
    2042                 :            : 
    2043         [ +  - ]:        658 :   rc = archive_read_open_FILE (a, fp);
    2044         [ -  + ]:        658 :   if (rc != ARCHIVE_OK)
    2045                 :            :     {
    2046   [ #  #  #  #  :          0 :       obatched(clog) << "cannot open archive from pipe " << b_source0 << endl;
                   #  # ]
    2047   [ #  #  #  # ]:          0 :       throw archive_exception(a, "cannot open archive from pipe");
    2048                 :            :     }
    2049                 :            : 
    2050                 :            :   // archive traversal is in three stages, no, four stages:
    2051                 :            :   // 1) skip entries whose names do not match the requested one
    2052                 :            :   // 2) extract the matching entry name (set r = result)
    2053                 :            :   // 3) extract some number of prefetched entries (just into fdcache)
    2054                 :            :   // 4) abort any further processing
    2055                 :        658 :   struct MHD_Response* r = 0;                 // will set in stage 2
    2056         [ +  + ]:        658 :   unsigned prefetch_count =
    2057                 :            :     internal_req_p ? 0 : fdcache_prefetch;    // will decrement in stage 3
    2058                 :            : 
    2059         [ +  + ]:      10144 :   while(r == 0 || prefetch_count > 0) // stage 1, 2, or 3
    2060                 :            :     {
    2061         [ +  - ]:      10124 :       if (interrupted)
    2062                 :            :         break;
    2063                 :            : 
    2064                 :      10124 :       struct archive_entry *e;
    2065         [ +  - ]:      10124 :       rc = archive_read_next_header (a, &e);
    2066         [ +  + ]:      10124 :       if (rc != ARCHIVE_OK)
    2067                 :            :         break;
    2068                 :            : 
    2069   [ +  -  +  + ]:       9486 :       if (! S_ISREG(archive_entry_mode (e))) // skip non-files completely
    2070                 :       6658 :         continue;
    2071                 :            : 
    2072         [ +  - ]:       2828 :       string fn = canonicalized_archive_entry_pathname (e);
    2073   [ +  +  +  + ]:       2828 :       if ((r == 0) && (fn != b_source1)) // stage 1
    2074                 :       1594 :         continue;
    2075                 :            : 
    2076   [ +  -  +  + ]:       1234 :       if (fdcache.probe (b_source0, fn) && // skip if already interned
    2077         [ -  + ]:         24 :           fn != b_source1) // but only if we'd just be prefetching, PR29474
    2078                 :         24 :         continue;
    2079                 :            : 
    2080                 :            :       // extract this file to a temporary file
    2081                 :       1210 :       char* tmppath = NULL;
    2082                 :       1210 :       rc = asprintf (&tmppath, "%s/debuginfod.XXXXXX", tmpdir.c_str());
    2083         [ -  + ]:       1210 :       if (rc < 0)
    2084   [ #  #  #  # ]:          0 :         throw libc_exception (ENOMEM, "cannot allocate tmppath");
    2085                 :       1210 :       defer_dtor<void*,void> tmmpath_freer (tmppath, free);
    2086         [ +  - ]:       1210 :       fd = mkstemp (tmppath);
    2087         [ -  + ]:       1210 :       if (fd < 0)
    2088   [ #  #  #  # ]:          0 :         throw libc_exception (errno, "cannot create temporary file");
    2089                 :            :       // NB: don't unlink (tmppath), as fdcache will take charge of it.
    2090                 :            : 
    2091                 :            :       // NB: this can take many uninterruptible seconds for a huge file
    2092         [ +  - ]:       1210 :       rc = archive_read_data_into_fd (a, fd);
    2093         [ -  + ]:       1210 :       if (rc != ARCHIVE_OK) // e.g. ENOSPC!
    2094                 :            :         {
    2095         [ #  # ]:          0 :           close (fd);
    2096                 :          0 :           unlink (tmppath);
    2097   [ #  #  #  # ]:          0 :           throw archive_exception(a, "cannot extract file");
    2098                 :            :         }
    2099                 :            : 
    2100                 :            :       // Set the mtime so the fdcache file mtimes, even prefetched ones,
    2101                 :            :       // propagate to future webapi clients.
    2102                 :       1210 :       struct timespec tvs[2];
    2103                 :       1210 :       tvs[0].tv_sec = 0;
    2104                 :       1210 :       tvs[0].tv_nsec = UTIME_OMIT;
    2105         [ +  - ]:       1210 :       tvs[1].tv_sec = archive_entry_mtime(e);
    2106         [ +  - ]:       1210 :       tvs[1].tv_nsec = archive_entry_mtime_nsec(e);
    2107                 :       1210 :       (void) futimens (fd, tvs);  /* best effort */
    2108                 :            : 
    2109         [ +  + ]:       1210 :       if (r != 0) // stage 3
    2110                 :            :         {
    2111                 :            :           // NB: now we know we have a complete reusable file; make fdcache
    2112                 :            :           // responsible for unlinking it later.
    2113   [ +  -  +  -  :        552 :           fdcache.intern(b_source0, fn,
                   +  - ]
    2114                 :            :                          tmppath, archive_entry_size(e),
    2115                 :            :                          false); // prefetched ones go to the prefetch cache
    2116                 :        552 :           prefetch_count --;
    2117         [ +  - ]:        552 :           close (fd); // we're not saving this fd to make a mhd-response from!
    2118                 :        552 :           continue;
    2119                 :            :         }
    2120                 :            : 
    2121                 :            :       // NB: now we know we have a complete reusable file; make fdcache
    2122                 :            :       // responsible for unlinking it later.
    2123   [ +  -  +  -  :        658 :       fdcache.intern(b_source0, b_source1,
                   +  - ]
    2124                 :            :                      tmppath, archive_entry_size(e),
    2125                 :            :                      true); // requested ones go to the front of lru
    2126                 :            : 
    2127         [ +  + ]:        658 :       if (!section.empty ())
    2128                 :            :         {
    2129   [ +  -  +  - ]:          4 :           int scn_fd = extract_section (fd, b_mtime,
    2130   [ +  -  +  -  :          8 :                                         b_source0 + ":" + b_source1,
                   -  + ]
    2131                 :            :                                         section);
    2132         [ +  - ]:          4 :           close (fd);
    2133         [ +  - ]:          4 :           if (scn_fd >= 0)
    2134                 :          4 :             fd = scn_fd;
    2135                 :            :           else
    2136                 :            :             {
    2137         [ #  # ]:          0 :               if (verbose)
    2138   [ #  #  #  # ]:          0 :                 obatched (clog) << "cannot find section " << section
    2139                 :            :                                 << " for archive " << b_source0
    2140   [ #  #  #  #  :          0 :                                 << " file " << b_source1 << endl;
          #  #  #  #  #  
                      # ]
    2141                 :          0 :               return 0;
    2142                 :            :             }
    2143                 :            : 
    2144                 :          4 :           rc = fstat(fd, &fs);
    2145         [ -  + ]:          4 :           if (rc < 0)
    2146                 :            :             {
    2147         [ #  # ]:          0 :               close (fd);
    2148   [ #  #  #  # ]:          0 :               throw libc_exception (errno,
    2149   [ #  #  #  #  :          0 :                 string ("fstat ") + b_source0 + string (" ") + section);
          #  #  #  #  #  
          #  #  #  #  #  
          #  #  #  #  #  
                      # ]
    2150                 :            :             }
    2151         [ +  - ]:          4 :           r = MHD_create_response_from_fd (fs.st_size, fd);
    2152                 :            :         }
    2153                 :            :       else
    2154   [ +  -  +  - ]:        654 :         r = MHD_create_response_from_fd (archive_entry_size(e), fd);
    2155                 :            : 
    2156   [ +  -  +  -  :       1316 :       inc_metric ("http_responses_total","result",archive_extension + " archive");
          +  -  +  -  -  
          +  +  +  -  -  
                   -  - ]
    2157         [ -  + ]:        658 :       if (r == 0)
    2158                 :            :         {
    2159         [ #  # ]:          0 :           if (verbose)
    2160   [ #  #  #  #  :          0 :             obatched(clog) << "cannot create fd-response for " << b_source0 << endl;
                   #  # ]
    2161         [ #  # ]:          0 :           close(fd);
    2162                 :          0 :           break; // assume no chance of better luck around another iteration; no other copies of same file
    2163                 :            :         }
    2164                 :            :       else
    2165                 :            :         {
    2166         [ +  - ]:        658 :           add_mhd_response_header (r, "Content-Type",
    2167                 :            :                                    "application/octet-stream");
    2168         [ +  - ]:        658 :           add_mhd_response_header (r, "X-DEBUGINFOD-SIZE",
    2169   [ +  -  +  - ]:        658 :                                    to_string(archive_entry_size(e)).c_str());
    2170         [ +  - ]:        658 :           add_mhd_response_header (r, "X-DEBUGINFOD-ARCHIVE", b_source0.c_str());
    2171         [ +  - ]:        658 :           add_mhd_response_header (r, "X-DEBUGINFOD-FILE", b_source1.c_str());
    2172   [ +  -  +  - ]:        658 :           add_mhd_last_modified (r, archive_entry_mtime(e));
    2173         [ +  - ]:        658 :           if (verbose > 1)
    2174   [ +  -  +  - ]:       1974 :             obatched(clog) << "serving archive " << b_source0
    2175                 :            :                            << " file " << b_source1
    2176   [ +  -  +  -  :        658 :                            << " section=" << section << endl;
          +  -  +  -  +  
                      - ]
    2177                 :            :           /* libmicrohttpd will close it. */
    2178         [ +  - ]:        658 :           if (result_fd)
    2179                 :        658 :             *result_fd = fd;
    2180                 :        658 :           continue;
    2181                 :            :         }
    2182   [ -  -  -  -  :      12952 :     }
                   +  + ]
    2183                 :            : 
    2184                 :            :   // XXX: rpm/file not found: delete this R entry?
    2185                 :            :   return r;
    2186   [ -  +  +  + ]:       1386 : }
    2187                 :            : 
    2188                 :            : 
    2189                 :            : static struct MHD_Response*
    2190                 :        860 : handle_buildid_match (bool internal_req_p,
    2191                 :            :                       int64_t b_mtime,
    2192                 :            :                       const string& b_stype,
    2193                 :            :                       const string& b_source0,
    2194                 :            :                       const string& b_source1,
    2195                 :            :                       const string& section,
    2196                 :            :                       int *result_fd)
    2197                 :            : {
    2198                 :        860 :   try
    2199                 :            :     {
    2200         [ +  + ]:        860 :       if (b_stype == "F")
    2201         [ +  - ]:         74 :         return handle_buildid_f_match(internal_req_p, b_mtime, b_source0,
    2202                 :            :                                       section, result_fd);
    2203         [ +  - ]:        786 :       else if (b_stype == "R")
    2204         [ +  + ]:        786 :         return handle_buildid_r_match(internal_req_p, b_mtime, b_source0,
    2205                 :            :                                       b_source1, section, result_fd);
    2206                 :            :     }
    2207         [ -  + ]:         58 :   catch (const reportable_exception &e)
    2208                 :            :     {
    2209         [ +  - ]:         58 :       e.report(clog);
    2210                 :            :       // Report but swallow libc etc. errors here; let the caller
    2211                 :            :       // iterate to other matches of the content.
    2212                 :         58 :     }
    2213                 :            : 
    2214                 :            :   return 0;
    2215                 :            : }
    2216                 :            : 
    2217                 :            : 
    2218                 :            : static int
    2219                 :       3235 : debuginfod_find_progress (debuginfod_client *, long a, long b)
    2220                 :            : {
    2221         [ -  + ]:       3235 :   if (verbose > 4)
    2222   [ #  #  #  #  :          0 :     obatched(clog) << "federated debuginfod progress=" << a << "/" << b << endl;
             #  #  #  # ]
    2223                 :            : 
    2224                 :       3235 :   return interrupted;
    2225                 :            : }
    2226                 :            : 
    2227                 :            : 
    2228                 :            : // a little lru pool of debuginfod_client*s for reuse between query threads
    2229                 :            : 
    2230                 :            : mutex dc_pool_lock;
    2231                 :            : deque<debuginfod_client*> dc_pool;
    2232                 :            : 
    2233                 :        620 : debuginfod_client* debuginfod_pool_begin()
    2234                 :            : {
    2235                 :        620 :   unique_lock<mutex> lock(dc_pool_lock);
    2236         [ +  + ]:        620 :   if (dc_pool.size() > 0)
    2237                 :            :     {
    2238   [ +  -  +  -  :       1188 :       inc_metric("dc_pool_op_count","op","begin-reuse");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2239                 :        594 :       debuginfod_client *c = dc_pool.front();
    2240                 :        594 :       dc_pool.pop_front();
    2241                 :        594 :       return c;
    2242                 :            :     }
    2243   [ +  -  +  -  :         52 :   inc_metric("dc_pool_op_count","op","begin-new");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2244         [ +  - ]:         26 :   return debuginfod_begin();
    2245                 :        620 : }
    2246                 :            : 
    2247                 :            : 
    2248                 :        142 : void debuginfod_pool_groom()
    2249                 :            : {
    2250                 :        142 :   unique_lock<mutex> lock(dc_pool_lock);
    2251         [ +  + ]:        168 :   while (dc_pool.size() > 0)
    2252                 :            :     {
    2253   [ +  -  +  -  :         52 :       inc_metric("dc_pool_op_count","op","end");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2254         [ +  - ]:         26 :       debuginfod_end(dc_pool.front());
    2255                 :         26 :       dc_pool.pop_front();
    2256                 :            :     }
    2257                 :        142 : }
    2258                 :            : 
    2259                 :            : 
    2260                 :        620 : void debuginfod_pool_end(debuginfod_client* c)
    2261                 :            : {
    2262                 :        620 :   unique_lock<mutex> lock(dc_pool_lock);
    2263   [ +  -  +  -  :       1240 :   inc_metric("dc_pool_op_count","op","end-save");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2264         [ +  - ]:        620 :   dc_pool.push_front(c); // accelerate reuse, vs. push_back
    2265                 :        620 : }
    2266                 :            : 
    2267                 :            : 
    2268                 :            : static struct MHD_Response*
    2269                 :       1426 : handle_buildid (MHD_Connection* conn,
    2270                 :            :                 const string& buildid /* unsafe */,
    2271                 :            :                 string& artifacttype /* unsafe, cleanse on exception/return */,
    2272                 :            :                 const string& suffix /* unsafe */,
    2273                 :            :                 int *result_fd)
    2274                 :            : {
    2275                 :            :   // validate artifacttype
    2276                 :       1426 :   string atype_code;
    2277   [ +  +  +  - ]:       1426 :   if (artifacttype == "debuginfo") atype_code = "D";
    2278   [ +  +  +  - ]:        688 :   else if (artifacttype == "executable") atype_code = "E";
    2279   [ +  +  +  - ]:         68 :   else if (artifacttype == "source") atype_code = "S";
    2280   [ +  +  +  - ]:         12 :   else if (artifacttype == "section") atype_code = "I";
    2281                 :            :   else {
    2282         [ +  - ]:          4 :     artifacttype = "invalid"; // PR28242 ensure http_resposes metrics don't propagate unclean user data 
    2283   [ +  -  +  - ]:         12 :     throw reportable_exception("invalid artifacttype");
    2284                 :            :   }
    2285                 :            : 
    2286         [ +  + ]:       1422 :   if (conn != 0)
    2287   [ +  -  +  -  :       3388 :     inc_metric("http_requests_total", "type", artifacttype);
          +  -  -  +  -  
                -  -  + ]
    2288                 :            : 
    2289                 :       1422 :   string section;
    2290         [ +  + ]:       1422 :   if (atype_code == "I")
    2291                 :            :     {
    2292         [ -  + ]:          8 :       if (suffix.size () < 2)
    2293   [ #  #  #  # ]:          0 :         throw reportable_exception ("invalid section suffix");
    2294                 :            : 
    2295                 :            :       // Remove leading '/'
    2296   [ +  -  -  + ]:          8 :       section = suffix.substr(1);
    2297                 :            :     }
    2298                 :            : 
    2299   [ +  +  -  + ]:       1478 :   if (atype_code == "S" && suffix == "")
    2300   [ #  #  #  # ]:          0 :      throw reportable_exception("invalid source suffix");
    2301                 :            : 
    2302                 :            :   // validate buildid
    2303         [ +  + ]:       1422 :   if ((buildid.size() < 2) || // not empty
    2304   [ +  +  +  -  :       2840 :       (buildid.size() % 2) || // even number
                   +  - ]
    2305                 :       1418 :       (buildid.find_first_not_of("0123456789abcdef") != string::npos)) // pure tasty lowercase hex
    2306   [ +  -  -  + ]:          8 :     throw reportable_exception("invalid buildid");
    2307                 :            : 
    2308         [ +  - ]:       1418 :   if (verbose > 1)
    2309   [ +  -  +  - ]:       4254 :     obatched(clog) << "searching for buildid=" << buildid << " artifacttype=" << artifacttype
    2310   [ +  -  +  -  :       1418 :          << " suffix=" << suffix << endl;
          +  -  +  -  +  
                      - ]
    2311                 :            : 
    2312                 :            :   // If invoked from the scanner threads, use the scanners' read-write
    2313                 :            :   // connection.  Otherwise use the web query threads' read-only connection.
    2314         [ +  + ]:       1418 :   sqlite3 *thisdb = (conn == 0) ? db : dbq;
    2315                 :            : 
    2316                 :       1418 :   sqlite_ps *pp = 0;
    2317                 :            : 
    2318         [ +  + ]:       1418 :   if (atype_code == "D")
    2319                 :            :     {
    2320         [ -  + ]:        738 :       pp = new sqlite_ps (thisdb, "mhd-query-d",
    2321                 :            :                           "select mtime, sourcetype, source0, source1 from " BUILDIDS "_query_d where buildid = ? "
    2322   [ +  -  +  -  :       1476 :                           "order by mtime desc");
          +  -  +  -  +  
                -  -  - ]
    2323         [ +  - ]:        738 :       pp->reset();
    2324         [ +  - ]:        738 :       pp->bind(1, buildid);
    2325                 :            :     }
    2326         [ +  + ]:        680 :   else if (atype_code == "E")
    2327                 :            :     {
    2328         [ -  + ]:        616 :       pp = new sqlite_ps (thisdb, "mhd-query-e",
    2329                 :            :                           "select mtime, sourcetype, source0, source1 from " BUILDIDS "_query_e where buildid = ? "
    2330   [ +  -  +  -  :       1232 :                           "order by mtime desc");
          +  -  +  -  +  
                -  -  - ]
    2331         [ +  - ]:        616 :       pp->reset();
    2332         [ +  - ]:        616 :       pp->bind(1, buildid);
    2333                 :            :     }
    2334         [ +  + ]:         64 :   else if (atype_code == "S")
    2335                 :            :     {
    2336                 :            :       // PR25548
    2337                 :            :       // Incoming source queries may come in with either dwarf-level OR canonicalized paths.
    2338                 :            :       // We let the query pass with either one.
    2339                 :            : 
    2340         [ -  + ]:         56 :       pp = new sqlite_ps (thisdb, "mhd-query-s",
    2341                 :            :                           "select mtime, sourcetype, source0, source1 from " BUILDIDS "_query_s where buildid = ? and artifactsrc in (?,?) "
    2342   [ +  -  +  -  :        112 :                           "order by sharedprefix(source0,source0ref) desc, mtime desc");
          +  -  +  -  +  
                -  -  - ]
    2343         [ +  - ]:         56 :       pp->reset();
    2344         [ +  - ]:         56 :       pp->bind(1, buildid);
    2345                 :            :       // NB: we don't store the non-canonicalized path names any more, but old databases
    2346                 :            :       // might have them (and no canon ones), so we keep searching for both.
    2347         [ +  - ]:         56 :       pp->bind(2, suffix);
    2348   [ +  -  +  -  :        732 :       pp->bind(3, canon_pathname(suffix));
                   -  + ]
    2349                 :            :     }
    2350         [ +  - ]:          8 :   else if (atype_code == "I")
    2351                 :            :     {
    2352         [ -  + ]:          8 :       pp = new sqlite_ps (thisdb, "mhd-query-i",
    2353                 :            :         "select mtime, sourcetype, source0, source1, 1 as debug_p from " BUILDIDS "_query_d where buildid = ? "
    2354                 :            :         "union all "
    2355                 :            :         "select mtime, sourcetype, source0, source1, 0 as debug_p from " BUILDIDS "_query_e where buildid = ? "
    2356   [ +  -  +  -  :         16 :         "order by debug_p desc, mtime desc");
          +  -  +  -  +  
                -  -  - ]
    2357         [ +  - ]:          8 :       pp->reset();
    2358         [ +  - ]:          8 :       pp->bind(1, buildid);
    2359         [ +  - ]:          8 :       pp->bind(2, buildid);
    2360                 :            :     }
    2361                 :       1418 :   unique_ptr<sqlite_ps> ps_closer(pp); // release pp if exception or return
    2362                 :            : 
    2363                 :       1418 :   bool do_upstream_section_query = true;
    2364                 :            : 
    2365                 :            :   // consume all the rows
    2366                 :       1480 :   while (1)
    2367                 :            :     {
    2368         [ +  - ]:       1480 :       int rc = pp->step();
    2369         [ +  + ]:       1480 :       if (rc == SQLITE_DONE) break;
    2370         [ -  + ]:        860 :       if (rc != SQLITE_ROW)
    2371   [ #  #  #  # ]:          0 :         throw sqlite_exception(rc, "step");
    2372                 :            : 
    2373         [ +  - ]:        860 :       int64_t b_mtime = sqlite3_column_int64 (*pp, 0);
    2374   [ +  -  -  +  :        860 :       string b_stype = string((const char*) sqlite3_column_text (*pp, 1) ?: ""); /* by DDL may not be NULL */
                   +  - ]
    2375   [ +  -  -  +  :        860 :       string b_source0 = string((const char*) sqlite3_column_text (*pp, 2) ?: ""); /* may be NULL */
             +  -  -  - ]
    2376   [ +  -  +  +  :        934 :       string b_source1 = string((const char*) sqlite3_column_text (*pp, 3) ?: ""); /* may be NULL */
             +  -  -  - ]
    2377                 :            : 
    2378         [ +  - ]:        860 :       if (verbose > 1)
    2379   [ +  -  +  -  :       2580 :         obatched(clog) << "found mtime=" << b_mtime << " stype=" << b_stype
                   -  - ]
    2380   [ +  -  +  -  :        860 :              << " source0=" << b_source0 << " source1=" << b_source1 << endl;
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    2381                 :            : 
    2382                 :            :       // Try accessing the located match.
    2383                 :            :       // XXX: in case of multiple matches, attempt them in parallel?
    2384         [ +  - ]:        860 :       auto r = handle_buildid_match (conn ? false : true,
    2385                 :            :                                      b_mtime, b_stype, b_source0, b_source1,
    2386                 :            :                                      section, result_fd);
    2387         [ +  + ]:        860 :       if (r)
    2388         [ +  + ]:        798 :         return r;
    2389                 :            : 
    2390                 :            :       // If a debuginfo file matching BUILDID was found but didn't contain
    2391                 :            :       // the desired section, then the section should not exist.  Don't
    2392                 :            :       // bother querying upstream servers.
    2393   [ +  +  +  -  :         62 :       if (!section.empty () && (sqlite3_column_int (*pp, 4) == 1))
                   -  + ]
    2394                 :            :         {
    2395                 :          4 :           struct stat st;
    2396                 :            : 
    2397                 :            :           // For "F" sourcetype, check if the debuginfo exists. For "R"
    2398                 :            :           // sourcetype, check if the debuginfo was interned into the fdcache.
    2399         [ -  + ]:          6 :           if ((b_stype == "F" && (stat (b_source0.c_str (), &st) == 0))
    2400   [ +  +  +  -  :          6 :               || (b_stype == "R" && fdcache.probe (b_source0, b_source1)))
             +  -  -  + ]
    2401                 :            :             do_upstream_section_query = false;
    2402                 :            :         }
    2403   [ +  -  -  +  :       1720 :     }
             +  -  -  + ]
    2404         [ +  - ]:        620 :   pp->reset();
    2405                 :            : 
    2406         [ -  + ]:        620 :   if (!do_upstream_section_query)
    2407   [ #  #  #  # ]:          0 :     throw reportable_exception(MHD_HTTP_NOT_FOUND, "not found");
    2408                 :            : 
    2409                 :            :   // We couldn't find it in the database.  Last ditch effort
    2410                 :            :   // is to defer to other debuginfo servers.
    2411                 :            : 
    2412                 :        620 :   int fd = -1;
    2413         [ +  - ]:        620 :   debuginfod_client *client = debuginfod_pool_begin ();
    2414         [ -  + ]:        620 :   if (client == NULL)
    2415   [ #  #  #  # ]:          0 :     throw libc_exception(errno, "debuginfod client pool alloc");
    2416                 :        620 :   defer_dtor<debuginfod_client*,void> client_closer (client, debuginfod_pool_end);
    2417                 :            :   
    2418         [ +  - ]:        620 :   debuginfod_set_progressfn (client, & debuginfod_find_progress);
    2419                 :            : 
    2420         [ +  - ]:        620 :   if (conn)
    2421                 :            :     {
    2422                 :            :       // Transcribe incoming User-Agent:
    2423   [ +  -  -  +  :        620 :       string ua = MHD_lookup_connection_value (conn, MHD_HEADER_KIND, "User-Agent") ?: "";
                   +  - ]
    2424   [ +  -  +  -  :        624 :       string ua_complete = string("User-Agent: ") + ua;
                   +  - ]
    2425         [ +  - ]:        620 :       debuginfod_add_http_header (client, ua_complete.c_str());
    2426                 :            :       
    2427                 :            :       // Compute larger XFF:, for avoiding info loss during
    2428                 :            :       // federation, and for future cyclicity detection.
    2429   [ +  -  +  +  :       1226 :       string xff = MHD_lookup_connection_value (conn, MHD_HEADER_KIND, "X-Forwarded-For") ?: "";
             +  -  +  - ]
    2430         [ +  + ]:        620 :       if (xff != "")
    2431   [ +  -  -  + ]:         36 :         xff += string(", "); // comma separated list
    2432                 :            :       
    2433                 :        620 :       unsigned int xff_count = 0;
    2434         [ +  + ]:        860 :       for (auto&& i : xff){
    2435         [ +  + ]:        240 :         if (i == ',') xff_count++;
    2436                 :            :       }
    2437                 :            : 
    2438                 :            :       // if X-Forwarded-For: exceeds N hops,
    2439                 :            :       // do not delegate a local lookup miss to upstream debuginfods.
    2440         [ +  + ]:        620 :       if (xff_count >= forwarded_ttl_limit)
    2441   [ +  -  +  - ]:          8 :         throw reportable_exception(MHD_HTTP_NOT_FOUND, "not found, --forwared-ttl-limit reached \
    2442                 :          8 : and will not query the upstream servers");
    2443                 :            : 
    2444                 :            :       // Compute the client's numeric IP address only - so can't merge with conninfo()
    2445         [ +  - ]:        616 :       const union MHD_ConnectionInfo *u = MHD_get_connection_info (conn,
    2446                 :            :                                                                    MHD_CONNECTION_INFO_CLIENT_ADDRESS);
    2447         [ +  - ]:        616 :       struct sockaddr *so = u ? u->client_addr : 0;
    2448                 :        616 :       char hostname[256] = ""; // RFC1035
    2449   [ +  -  -  + ]:        616 :       if (so && so->sa_family == AF_INET) {
    2450         [ #  # ]:          0 :         (void) getnameinfo (so, sizeof (struct sockaddr_in), hostname, sizeof (hostname), NULL, 0,
    2451                 :            :                             NI_NUMERICHOST);
    2452         [ +  - ]:        616 :       } else if (so && so->sa_family == AF_INET6) {
    2453                 :        616 :         struct sockaddr_in6* addr6 = (struct sockaddr_in6*) so;
    2454   [ +  -  +  -  :        616 :         if (IN6_IS_ADDR_V4MAPPED(&addr6->sin6_addr)) {
                   -  + ]
    2455                 :        616 :           struct sockaddr_in addr4;
    2456         [ +  - ]:        616 :           memset (&addr4, 0, sizeof(addr4));
    2457                 :        616 :           addr4.sin_family = AF_INET;
    2458                 :        616 :           addr4.sin_port = addr6->sin6_port;
    2459         [ +  - ]:        616 :           memcpy (&addr4.sin_addr.s_addr, addr6->sin6_addr.s6_addr+12, sizeof(addr4.sin_addr.s_addr));
    2460         [ +  - ]:        616 :           (void) getnameinfo ((struct sockaddr*) &addr4, sizeof (addr4),
    2461                 :            :                               hostname, sizeof (hostname), NULL, 0,
    2462                 :            :                               NI_NUMERICHOST);
    2463                 :            :         } else {
    2464         [ #  # ]:          0 :           (void) getnameinfo (so, sizeof (struct sockaddr_in6), hostname, sizeof (hostname), NULL, 0,
    2465                 :            :                               NI_NUMERICHOST);
    2466                 :            :         }
    2467                 :            :       }
    2468                 :            :           
    2469   [ +  -  +  -  :       1236 :       string xff_complete = string("X-Forwarded-For: ")+xff+string(hostname);
          +  -  +  -  -  
          +  -  +  -  -  
                   -  + ]
    2470         [ +  - ]:        616 :       debuginfod_add_http_header (client, xff_complete.c_str());
    2471   [ +  +  +  -  :       1300 :     }
                   +  + ]
    2472                 :            :   
    2473         [ +  + ]:        616 :   if (artifacttype == "debuginfo")
    2474         [ +  - ]:         68 :     fd = debuginfod_find_debuginfo (client,
    2475         [ +  - ]:         68 :                                     (const unsigned char*) buildid.c_str(),
    2476                 :            :                                     0, NULL);
    2477         [ +  + ]:        548 :   else if (artifacttype == "executable")
    2478         [ +  - ]:        546 :     fd = debuginfod_find_executable (client,
    2479         [ +  - ]:        546 :                                      (const unsigned char*) buildid.c_str(),
    2480                 :            :                                      0, NULL);
    2481         [ +  - ]:          2 :   else if (artifacttype == "source")
    2482         [ +  - ]:          2 :     fd = debuginfod_find_source (client,
    2483         [ +  - ]:          2 :                                  (const unsigned char*) buildid.c_str(),
    2484                 :            :                                  0, suffix.c_str(), NULL);
    2485         [ #  # ]:          0 :   else if (artifacttype == "section")
    2486         [ #  # ]:          0 :     fd = debuginfod_find_section (client,
    2487         [ #  # ]:          0 :                                   (const unsigned char*) buildid.c_str(),
    2488                 :            :                                   0, section.c_str(), NULL);
    2489                 :            :   
    2490         [ +  + ]:        616 :   if (fd >= 0)
    2491                 :            :     {
    2492         [ +  - ]:          4 :       if (conn != 0)
    2493   [ +  -  +  -  :        624 :         inc_metric ("http_responses_total","result","upstream");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2494                 :          4 :       struct stat s;
    2495                 :          4 :       int rc = fstat (fd, &s);
    2496         [ +  - ]:          4 :       if (rc == 0)
    2497                 :            :         {
    2498         [ +  - ]:          4 :           auto r = MHD_create_response_from_fd ((uint64_t) s.st_size, fd);
    2499         [ +  - ]:          4 :           if (r)
    2500                 :            :             {
    2501         [ +  - ]:          4 :               add_mhd_response_header (r, "Content-Type",
    2502                 :            :                                        "application/octet-stream");
    2503                 :            :               // Copy the incoming headers
    2504         [ +  - ]:          4 :               const char * hdrs = debuginfod_get_headers(client);
    2505         [ +  - ]:          4 :               string header_dup;
    2506         [ +  - ]:          4 :               if (hdrs)
    2507   [ +  -  -  + ]:          4 :                 header_dup = string(hdrs);
    2508                 :            :               // Parse the "header: value\n" lines into (h,v) tuples and pass on
    2509                 :         20 :               while(1)
    2510                 :            :                 {
    2511                 :         12 :                   size_t newline = header_dup.find('\n');
    2512         [ +  + ]:         12 :                   if (newline == string::npos) break;
    2513                 :          8 :                   size_t colon = header_dup.find(':');
    2514         [ +  - ]:          8 :                   if (colon == string::npos) break;
    2515         [ +  - ]:          8 :                   string header = header_dup.substr(0,colon);
    2516         [ +  - ]:          8 :                   string value = header_dup.substr(colon+1,newline-colon-1);
    2517                 :            :                   // strip leading spaces from value
    2518                 :          8 :                   size_t nonspace = value.find_first_not_of(" ");
    2519         [ +  - ]:          8 :                   if (nonspace != string::npos)
    2520   [ +  -  +  + ]:         12 :                     value = value.substr(nonspace);
    2521         [ +  - ]:          8 :                   add_mhd_response_header(r, header.c_str(), value.c_str());
    2522   [ +  -  +  +  :         12 :                   header_dup = header_dup.substr(newline+1);
             +  +  -  - ]
    2523         [ +  - ]:         16 :                 }
    2524                 :            : 
    2525         [ +  - ]:          4 :               add_mhd_last_modified (r, s.st_mtime);
    2526         [ +  - ]:          4 :               if (verbose > 1)
    2527   [ +  -  +  -  :          8 :                 obatched(clog) << "serving file from upstream debuginfod/cache" << endl;
                   -  - ]
    2528         [ +  - ]:          4 :               if (result_fd)
    2529                 :          4 :                 *result_fd = fd;
    2530         [ +  - ]:          4 :               return r; // NB: don't close fd; libmicrohttpd will
    2531                 :          4 :             }
    2532                 :            :         }
    2533         [ #  # ]:          0 :       close (fd);
    2534                 :            :     }
    2535                 :            :   else
    2536         [ +  + ]:        612 :     switch(fd)
    2537                 :            :       {
    2538                 :            :       case -ENOSYS:
    2539                 :            :         break;
    2540                 :            :       case -ENOENT:
    2541                 :            :         break;
    2542                 :        532 :       default: // some more tricky error
    2543   [ +  -  +  - ]:       1064 :         throw libc_exception(-fd, "upstream debuginfod query failed");
    2544                 :            :       }
    2545                 :            : 
    2546   [ +  -  -  + ]:        160 :   throw reportable_exception(MHD_HTTP_NOT_FOUND, "not found");
    2547   [ -  +  -  + ]:       2038 : }
    2548                 :            : 
    2549                 :            : 
    2550                 :            : ////////////////////////////////////////////////////////////////////////
    2551                 :            : 
    2552                 :            : static map<string,double> metrics; // arbitrary data for /metrics query
    2553                 :            : // NB: store int64_t since all our metrics are integers; prometheus accepts double
    2554                 :            : static mutex metrics_lock;
    2555                 :            : // NB: these objects get released during the process exit via global dtors
    2556                 :            : // do not call them from within other global dtors
    2557                 :            : 
    2558                 :            : // utility function for assembling prometheus-compatible
    2559                 :            : // name="escaped-value" strings
    2560                 :            : // https://prometheus.io/docs/instrumenting/exposition_formats/
    2561                 :            : static string
    2562                 :     256409 : metric_label(const string& name, const string& value)
    2563                 :            : {
    2564                 :     256409 :   string x = name + "=\"";
    2565         [ +  + ]:    4122322 :   for (auto&& c : value)
    2566   [ -  -  -  + ]:    3865992 :     switch(c)
    2567                 :            :       {
    2568         [ #  # ]:          0 :       case '\\': x += "\\\\"; break;
    2569         [ #  # ]:          0 :       case '\"': x += "\\\""; break;
    2570         [ #  # ]:          0 :       case '\n': x += "\\n"; break;
    2571         [ +  - ]:    7731905 :       default: x += c; break;
    2572                 :            :       }
    2573         [ +  - ]:     256330 :   x += "\"";
    2574                 :     256362 :   return x;
    2575                 :          0 : }
    2576                 :            : 
    2577                 :            : 
    2578                 :            : // add prometheus-format metric name + label tuple (if any) + value
    2579                 :            : 
    2580                 :            : static void
    2581                 :       8808 : set_metric(const string& metric, double value)
    2582                 :            : {
    2583                 :       8808 :   unique_lock<mutex> lock(metrics_lock);
    2584         [ +  - ]:       8808 :   metrics[metric] = value;
    2585                 :       8808 : }
    2586                 :            : #if 0 /* unused */
    2587                 :            : static void
    2588                 :            : inc_metric(const string& metric)
    2589                 :            : {
    2590                 :            :   unique_lock<mutex> lock(metrics_lock);
    2591                 :            :   metrics[metric] ++;
    2592                 :            : }
    2593                 :            : #endif
    2594                 :            : static void
    2595                 :       7136 : set_metric(const string& metric,
    2596                 :            :            const string& lname, const string& lvalue,
    2597                 :            :            double value)
    2598                 :            : {
    2599   [ +  -  +  -  :      14272 :   string key = (metric + "{" + metric_label(lname, lvalue) + "}");
          -  +  -  +  +  
                +  -  - ]
    2600         [ +  - ]:       7136 :   unique_lock<mutex> lock(metrics_lock);
    2601         [ +  - ]:       7136 :   metrics[key] = value;
    2602         [ +  - ]:      14272 : }
    2603                 :            : 
    2604                 :            : static void
    2605                 :     114163 : inc_metric(const string& metric,
    2606                 :            :            const string& lname, const string& lvalue)
    2607                 :            : {
    2608   [ +  -  +  -  :     245745 :   string key = (metric + "{" + metric_label(lname, lvalue) + "}");
          -  +  +  +  +  
                +  -  - ]
    2609         [ +  - ]:     114162 :   unique_lock<mutex> lock(metrics_lock);
    2610         [ +  - ]:     114167 :   metrics[key] ++;
    2611         [ +  - ]:     228318 : }
    2612                 :            : static void
    2613                 :     110221 : add_metric(const string& metric,
    2614                 :            :            const string& lname, const string& lvalue,
    2615                 :            :            double value)
    2616                 :            : {
    2617   [ +  -  +  -  :     237878 :   string key = (metric + "{" + metric_label(lname, lvalue) + "}");
          -  +  +  +  +  
                +  -  - ]
    2618         [ +  - ]:     110241 :   unique_lock<mutex> lock(metrics_lock);
    2619         [ +  - ]:     110250 :   metrics[key] += value;
    2620         [ +  - ]:     220491 : }
    2621                 :            : #if 0
    2622                 :            : static void
    2623                 :            : add_metric(const string& metric,
    2624                 :            :            double value)
    2625                 :            : {
    2626                 :            :   unique_lock<mutex> lock(metrics_lock);
    2627                 :            :   metrics[metric] += value;
    2628                 :            : }
    2629                 :            : #endif
    2630                 :            : 
    2631                 :            : 
    2632                 :            : // and more for higher arity labels if needed
    2633                 :            : 
    2634                 :            : static void
    2635                 :       6249 : inc_metric(const string& metric,
    2636                 :            :            const string& lname, const string& lvalue,
    2637                 :            :            const string& rname, const string& rvalue)
    2638                 :            : {
    2639   [ +  -  -  +  :      12498 :   string key = (metric + "{"
                   -  - ]
    2640   [ +  -  +  -  :      24996 :                 + metric_label(lname, lvalue) + ","
          -  +  -  +  +  
                +  -  - ]
    2641   [ +  -  -  +  :      18747 :                 + metric_label(rname, rvalue) + "}");
                   -  + ]
    2642         [ +  - ]:       6249 :   unique_lock<mutex> lock(metrics_lock);
    2643         [ +  - ]:       6249 :   metrics[key] ++;
    2644         [ +  - ]:      12498 : }
    2645                 :            : static void
    2646                 :       6249 : add_metric(const string& metric,
    2647                 :            :            const string& lname, const string& lvalue,
    2648                 :            :            const string& rname, const string& rvalue,
    2649                 :            :            double value)
    2650                 :            : {
    2651   [ +  -  -  +  :      12498 :   string key = (metric + "{"
                   -  - ]
    2652   [ +  -  +  -  :      24996 :                 + metric_label(lname, lvalue) + ","
          -  +  -  +  +  
                +  -  - ]
    2653   [ +  -  -  +  :      18747 :                 + metric_label(rname, rvalue) + "}");
                   -  + ]
    2654         [ +  - ]:       6249 :   unique_lock<mutex> lock(metrics_lock);
    2655         [ +  - ]:       6249 :   metrics[key] += value;
    2656         [ +  - ]:      12498 : }
    2657                 :            : 
    2658                 :            : static struct MHD_Response*
    2659                 :        691 : handle_metrics (off_t* size)
    2660                 :            : {
    2661                 :        691 :   stringstream o;
    2662                 :        691 :   {
    2663         [ +  - ]:        691 :     unique_lock<mutex> lock(metrics_lock);
    2664         [ +  + ]:      64796 :     for (auto&& i : metrics)
    2665         [ +  - ]:      64105 :       o << i.first
    2666                 :            :         << " "
    2667   [ +  -  +  - ]:      64105 :         << std::setprecision(std::numeric_limits<double>::digits10 + 1)
    2668   [ +  -  +  - ]:      64105 :         << i.second
    2669                 :      64105 :         << endl;
    2670                 :          0 :   }
    2671         [ +  - ]:        691 :   const string& os = o.str();
    2672         [ +  - ]:        691 :   MHD_Response* r = MHD_create_response_from_buffer (os.size(),
    2673         [ +  - ]:        691 :                                                      (void*) os.c_str(),
    2674                 :            :                                                      MHD_RESPMEM_MUST_COPY);
    2675         [ +  - ]:        691 :   if (r != NULL)
    2676                 :            :     {
    2677         [ +  - ]:        691 :       *size = os.size();
    2678         [ +  - ]:        691 :       add_mhd_response_header (r, "Content-Type", "text/plain");
    2679                 :            :     }
    2680         [ +  - ]:       1382 :   return r;
    2681                 :        691 : }
    2682                 :            : 
    2683                 :            : static struct MHD_Response*
    2684                 :          0 : handle_root (off_t* size)
    2685                 :            : {
    2686   [ #  #  #  #  :          0 :   static string version = "debuginfod (" + string (PACKAGE_NAME) + ") "
          #  #  #  #  #  
                #  #  # ]
    2687   [ #  #  #  #  :          0 :                           + string (PACKAGE_VERSION);
          #  #  #  #  #  
                      # ]
    2688                 :          0 :   MHD_Response* r = MHD_create_response_from_buffer (version.size (),
    2689                 :          0 :                                                      (void *) version.c_str (),
    2690                 :            :                                                      MHD_RESPMEM_PERSISTENT);
    2691         [ #  # ]:          0 :   if (r != NULL)
    2692                 :            :     {
    2693                 :          0 :       *size = version.size ();
    2694                 :          0 :       add_mhd_response_header (r, "Content-Type", "text/plain");
    2695                 :            :     }
    2696                 :          0 :   return r;
    2697                 :            : }
    2698                 :            : 
    2699                 :            : 
    2700                 :            : ////////////////////////////////////////////////////////////////////////
    2701                 :            : 
    2702                 :            : 
    2703                 :            : /* libmicrohttpd callback */
    2704                 :            : static MHD_RESULT
    2705                 :       4166 : handler_cb (void * /*cls*/,
    2706                 :            :             struct MHD_Connection *connection,
    2707                 :            :             const char *url,
    2708                 :            :             const char *method,
    2709                 :            :             const char * /*version*/,
    2710                 :            :             const char * /*upload_data*/,
    2711                 :            :             size_t * /*upload_data_size*/,
    2712                 :            :             void ** ptr)
    2713                 :            : {
    2714                 :       4166 :   struct MHD_Response *r = NULL;
    2715                 :       4166 :   string url_copy = url;
    2716                 :            : 
    2717                 :            :   /* libmicrohttpd always makes (at least) two callbacks: once just
    2718                 :            :      past the headers, and one after the request body is finished
    2719                 :            :      being received.  If we process things early (first callback) and
    2720                 :            :      queue a response, libmicrohttpd would suppress http keep-alive
    2721                 :            :      (via connection->read_closed = true). */
    2722                 :       4166 :   static int aptr; /* just some random object to use as a flag */
    2723         [ +  + ]:       4166 :   if (&aptr != *ptr)
    2724                 :            :     {
    2725                 :            :       /* do never respond on first call */
    2726                 :       2083 :       *ptr = &aptr;
    2727                 :       2083 :       return MHD_YES;
    2728                 :            :     }
    2729                 :       2083 :   *ptr = NULL;                     /* reset when done */
    2730                 :            :   
    2731         [ +  - ]:       2083 :   const char *maxsize_string = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "X-DEBUGINFOD-MAXSIZE");
    2732                 :       2083 :   long maxsize = 0;
    2733   [ +  +  +  - ]:       2083 :   if (maxsize_string != NULL && maxsize_string[0] != '\0')
    2734                 :          2 :     maxsize = atol(maxsize_string);
    2735                 :            :   else
    2736                 :            :     maxsize = 0;
    2737                 :            : 
    2738                 :            : #if MHD_VERSION >= 0x00097002
    2739                 :       2083 :   enum MHD_Result rc;
    2740                 :            : #else
    2741                 :            :   int rc = MHD_NO; // mhd
    2742                 :            : #endif
    2743                 :       2083 :   int http_code = 500;
    2744                 :       2083 :   off_t http_size = -1;
    2745                 :       2083 :   struct timespec ts_start, ts_end;
    2746                 :       2083 :   clock_gettime (CLOCK_MONOTONIC, &ts_start);
    2747                 :       2083 :   double afteryou = 0.0;
    2748         [ +  - ]:       2083 :   string artifacttype, suffix;
    2749                 :            : 
    2750                 :       2083 :   try
    2751                 :            :     {
    2752   [ +  -  -  +  :       4798 :       if (string(method) != "GET")
                   -  + ]
    2753   [ #  #  #  # ]:          0 :         throw reportable_exception(400, "we support GET only");
    2754                 :            : 
    2755                 :            :       /* Start decoding the URL. */
    2756                 :       2083 :       size_t slash1 = url_copy.find('/', 1);
    2757         [ +  - ]:       2083 :       string url1 = url_copy.substr(0, slash1); // ok even if slash1 not found
    2758                 :            : 
    2759   [ +  +  +  - ]:       3469 :       if (slash1 != string::npos && url1 == "/buildid")
    2760                 :            :         {
    2761                 :            :           // PR27863: block this thread awhile if another thread is already busy
    2762                 :            :           // fetching the exact same thing.  This is better for Everyone.
    2763                 :            :           // The latecomer says "... after you!" and waits.
    2764   [ +  -  +  -  :       3396 :           add_metric ("thread_busy", "role", "http-buildid-after-you", 1);
          +  -  +  -  -  
          +  +  -  -  -  
                   -  - ]
    2765                 :            : #ifdef HAVE_PTHREAD_SETNAME_NP
    2766                 :       1386 :           (void) pthread_setname_np (pthread_self(), "mhd-buildid-after-you");
    2767                 :            : #endif
    2768                 :       1386 :           struct timespec tsay_start, tsay_end;
    2769                 :       1386 :           clock_gettime (CLOCK_MONOTONIC, &tsay_start);
    2770   [ +  +  +  - ]:       1386 :           static unique_set<string> busy_urls;
    2771         [ +  - ]:       1386 :           unique_set_reserver<string> after_you(busy_urls, url_copy);
    2772                 :       1386 :           clock_gettime (CLOCK_MONOTONIC, &tsay_end);
    2773                 :       1386 :           afteryou = (tsay_end.tv_sec - tsay_start.tv_sec) + (tsay_end.tv_nsec - tsay_start.tv_nsec)/1.e9;
    2774   [ +  -  +  -  :       2772 :           add_metric ("thread_busy", "role", "http-buildid-after-you", -1);
          +  -  +  -  -  
          +  +  -  -  -  
                   -  - ]
    2775                 :            :           
    2776   [ +  -  +  -  :       2772 :           tmp_inc_metric m ("thread_busy", "role", "http-buildid");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2777                 :            : #ifdef HAVE_PTHREAD_SETNAME_NP
    2778                 :       1386 :           (void) pthread_setname_np (pthread_self(), "mhd-buildid");
    2779                 :            : #endif
    2780                 :       1386 :           size_t slash2 = url_copy.find('/', slash1+1);
    2781         [ -  + ]:       1386 :           if (slash2 == string::npos)
    2782   [ #  #  #  # ]:          0 :             throw reportable_exception("/buildid/ webapi error, need buildid");
    2783                 :            : 
    2784         [ +  - ]:       1386 :           string buildid = url_copy.substr(slash1+1, slash2-slash1-1);
    2785                 :            : 
    2786                 :       1386 :           size_t slash3 = url_copy.find('/', slash2+1);
    2787                 :            : 
    2788         [ +  + ]:       1386 :           if (slash3 == string::npos)
    2789                 :            :             {
    2790   [ +  -  -  + ]:       1322 :               artifacttype = url_copy.substr(slash2+1);
    2791         [ +  - ]:       1322 :               suffix = "";
    2792                 :            :             }
    2793                 :            :           else
    2794                 :            :             {
    2795   [ +  -  -  + ]:         64 :               artifacttype = url_copy.substr(slash2+1, slash3-slash2-1);
    2796   [ +  -  -  +  :        688 :               suffix = url_copy.substr(slash3); // include the slash in the suffix
                   +  + ]
    2797                 :            :             }
    2798                 :            : 
    2799                 :            :           // get the resulting fd so we can report its size
    2800                 :       1386 :           int fd;
    2801         [ +  + ]:       1386 :           r = handle_buildid(connection, buildid, artifacttype, suffix, &fd);
    2802         [ +  - ]:        762 :           if (r)
    2803                 :            :             {
    2804                 :        762 :               struct stat fs;
    2805         [ +  - ]:        762 :               if (fstat(fd, &fs) == 0)
    2806                 :        762 :                 http_size = fs.st_size;
    2807                 :            :               // libmicrohttpd will close (fd);
    2808                 :            :             }
    2809                 :       2010 :         }
    2810         [ +  + ]:        697 :       else if (url1 == "/metrics")
    2811                 :            :         {
    2812   [ +  -  +  -  :       1382 :           tmp_inc_metric m ("thread_busy", "role", "http-metrics");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2813         [ +  - ]:        691 :           artifacttype = "metrics";
    2814   [ +  -  +  -  :       1382 :           inc_metric("http_requests_total", "type", artifacttype);
          +  -  -  +  -  
                      - ]
    2815         [ +  - ]:        691 :           r = handle_metrics(& http_size);
    2816                 :        691 :         }
    2817         [ -  + ]:          6 :       else if (url1 == "/")
    2818                 :            :         {
    2819         [ #  # ]:          0 :           artifacttype = "/";
    2820   [ -  -  -  -  :        632 :           inc_metric("http_requests_total", "type", artifacttype);
          -  -  -  -  -  
                -  -  + ]
    2821         [ #  # ]:          0 :           r = handle_root(& http_size);
    2822                 :            :         }
    2823                 :            :       else
    2824   [ +  -  +  -  :         18 :         throw reportable_exception("webapi error, unrecognized '" + url1 + "'");
             +  -  -  + ]
    2825                 :            : 
    2826         [ -  + ]:       1453 :       if (r == 0)
    2827   [ #  #  #  # ]:          0 :         throw reportable_exception("internal error, missing response");
    2828                 :            : 
    2829   [ +  +  +  - ]:       1453 :       if (maxsize > 0 && http_size > maxsize)
    2830                 :            :         {
    2831         [ +  - ]:          2 :           MHD_destroy_response(r);
    2832   [ +  -  +  -  :          6 :           throw reportable_exception(406, "File too large, max size=" + std::to_string(maxsize));
             +  -  -  + ]
    2833                 :            :         }
    2834                 :            : 
    2835         [ +  - ]:       1451 :       rc = MHD_queue_response (connection, MHD_HTTP_OK, r);
    2836                 :       1451 :       http_code = MHD_HTTP_OK;
    2837         [ +  - ]:       1451 :       MHD_destroy_response (r);
    2838                 :       2083 :     }
    2839         [ -  + ]:        632 :   catch (const reportable_exception& e)
    2840                 :            :     {
    2841   [ +  -  +  -  :       1264 :       inc_metric("http_responses_total","result","error");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2842         [ +  - ]:        632 :       e.report(clog);
    2843                 :        632 :       http_code = e.code;
    2844         [ +  - ]:        632 :       http_size = e.message.size();
    2845         [ +  - ]:        632 :       rc = e.mhd_send_response (connection);
    2846                 :        632 :     }
    2847                 :            : 
    2848                 :       2083 :   clock_gettime (CLOCK_MONOTONIC, &ts_end);
    2849                 :       2083 :   double deltas = (ts_end.tv_sec - ts_start.tv_sec) + (ts_end.tv_nsec - ts_start.tv_nsec)/1.e9;
    2850                 :            :   // afteryou: delay waiting for other client's identical query to complete
    2851                 :            :   // deltas: total latency, including afteryou waiting
    2852   [ +  -  +  -  :       4166 :   obatched(clog) << conninfo(connection)
                   -  - ]
    2853                 :            :                  << ' ' << method << ' ' << url
    2854   [ +  -  +  -  :       2083 :                  << ' ' << http_code << ' ' << http_size
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    2855   [ +  -  +  -  :       2083 :                  << ' ' << (int)(afteryou*1000) << '+' << (int)((deltas-afteryou)*1000) << "ms"
          +  -  +  -  +  
             -  +  -  +  
                      - ]
    2856         [ +  - ]:       2083 :                  << endl;
    2857                 :            : 
    2858                 :            :   // related prometheus metrics
    2859                 :       2083 :   string http_code_str = to_string(http_code);
    2860   [ +  -  +  -  :       4166 :   add_metric("http_responses_transfer_bytes_sum",
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2861                 :            :              "code", http_code_str, "type", artifacttype, http_size);
    2862   [ +  -  +  -  :       4166 :   inc_metric("http_responses_transfer_bytes_count",
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2863                 :            :              "code", http_code_str, "type", artifacttype);
    2864                 :            : 
    2865   [ +  -  +  -  :       4166 :   add_metric("http_responses_duration_milliseconds_sum",
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2866                 :            :              "code", http_code_str, "type", artifacttype, deltas*1000); // prometheus prefers _seconds and floating point
    2867   [ +  -  +  -  :       4166 :   inc_metric("http_responses_duration_milliseconds_count",
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2868                 :            :              "code", http_code_str, "type", artifacttype);
    2869                 :            : 
    2870   [ +  -  +  -  :       4166 :   add_metric("http_responses_after_you_milliseconds_sum",
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    2871                 :            :              "code", http_code_str, "type", artifacttype, afteryou*1000);
    2872   [ +  -  +  -  :       4166 :   inc_metric("http_responses_after_you_milliseconds_count",
          +  -  +  -  -  
          +  -  +  -  -  
             -  -  -  - ]
    2873                 :            :              "code", http_code_str, "type", artifacttype);
    2874                 :            : 
    2875         [ -  + ]:       2083 :   return rc;
    2876   [ +  +  -  +  :       9077 : }
                   +  + ]
    2877                 :            : 
    2878                 :            : 
    2879                 :            : ////////////////////////////////////////////////////////////////////////
    2880                 :            : // borrowed originally from src/nm.c get_local_names()
    2881                 :            : 
    2882                 :            : static void
    2883                 :        210 : dwarf_extract_source_paths (Elf *elf, set<string>& debug_sourcefiles)
    2884                 :            :   noexcept // no exceptions - so we can simplify the altdbg resource release at end
    2885                 :            : {
    2886                 :        210 :   Dwarf* dbg = dwarf_begin_elf (elf, DWARF_C_READ, NULL);
    2887         [ -  + ]:        210 :   if (dbg == NULL)
    2888                 :          0 :     return;
    2889                 :            : 
    2890                 :        210 :   Dwarf* altdbg = NULL;
    2891                 :        210 :   int    altdbg_fd = -1;
    2892                 :            : 
    2893                 :            :   // DWZ handling: if we have an unsatisfied debug-alt-link, add an
    2894                 :            :   // empty string into the outgoing sourcefiles set, so the caller
    2895                 :            :   // should know that our data is incomplete.
    2896                 :        210 :   const char *alt_name_p;
    2897                 :        210 :   const void *alt_build_id; // elfutils-owned memory
    2898                 :        210 :   ssize_t sz = dwelf_dwarf_gnu_debugaltlink (dbg, &alt_name_p, &alt_build_id);
    2899         [ +  + ]:        210 :   if (sz > 0) // got one!
    2900                 :            :     {
    2901                 :         40 :       string buildid;
    2902                 :         40 :       unsigned char* build_id_bytes = (unsigned char*) alt_build_id;
    2903         [ +  + ]:        840 :       for (ssize_t idx=0; idx<sz; idx++)
    2904                 :            :         {
    2905                 :        800 :           buildid += "0123456789abcdef"[build_id_bytes[idx] >> 4];
    2906                 :        800 :           buildid += "0123456789abcdef"[build_id_bytes[idx] & 0xf];
    2907                 :            :         }
    2908                 :            : 
    2909         [ +  - ]:         40 :       if (verbose > 3)
    2910                 :         40 :         obatched(clog) << "Need altdebug buildid=" << buildid << endl;
    2911                 :            : 
    2912                 :            :       // but is it unsatisfied the normal elfutils ways?
    2913                 :         40 :       Dwarf* alt = dwarf_getalt (dbg);
    2914         [ +  - ]:         40 :       if (alt == NULL)
    2915                 :            :         {
    2916                 :            :           // Yup, unsatisfied the normal way.  Maybe we can satisfy it
    2917                 :            :           // from our own debuginfod database.
    2918                 :         40 :           int alt_fd;
    2919                 :         40 :           struct MHD_Response *r = 0;
    2920                 :         40 :           try
    2921                 :            :             {
    2922         [ +  - ]:         40 :               string artifacttype = "debuginfo";
    2923   [ +  -  +  -  :         40 :               r = handle_buildid (0, buildid, artifacttype, "", &alt_fd);
          -  +  -  +  -  
                      - ]
    2924                 :          0 :             }
    2925         [ -  - ]:          0 :           catch (const reportable_exception& e)
    2926                 :            :             {
    2927                 :            :               // swallow exceptions
    2928                 :          0 :             }
    2929                 :            : 
    2930                 :            :           // NB: this is not actually recursive!  This invokes the web-query
    2931                 :            :           // path, which cannot get back into the scan code paths.
    2932         [ +  - ]:         40 :           if (r)
    2933                 :            :             {
    2934                 :            :               // Found it!
    2935                 :         40 :               altdbg_fd = dup(alt_fd); // ok if this fails, downstream failures ok
    2936                 :         40 :               alt = altdbg = dwarf_begin (altdbg_fd, DWARF_C_READ);
    2937                 :            :               // NB: must close this dwarf and this fd at the bottom of the function!
    2938                 :         40 :               MHD_destroy_response (r); // will close alt_fd
    2939         [ +  - ]:         40 :               if (alt)
    2940                 :         40 :                 dwarf_setalt (dbg, alt);
    2941                 :            :             }
    2942                 :            :         }
    2943                 :            :       else
    2944                 :            :         {
    2945                 :            :           // NB: dwarf_setalt(alt) inappropriate - already done!
    2946                 :            :           // NB: altdbg will stay 0 so nothing tries to redundantly dealloc.
    2947                 :            :         }
    2948                 :            : 
    2949         [ +  - ]:         40 :       if (alt)
    2950                 :            :         {
    2951         [ +  - ]:         40 :           if (verbose > 3)
    2952                 :         40 :             obatched(clog) << "Resolved altdebug buildid=" << buildid << endl;
    2953                 :            :         }
    2954                 :            :       else // (alt == NULL) - signal possible presence of poor debuginfo
    2955                 :            :         {
    2956         [ #  # ]:          0 :           debug_sourcefiles.insert("");
    2957         [ #  # ]:          0 :           if (verbose > 3)
    2958                 :          0 :             obatched(clog) << "Unresolved altdebug buildid=" << buildid << endl;
    2959                 :            :         }
    2960                 :         40 :     }
    2961                 :            : 
    2962                 :        210 :   Dwarf_Off offset = 0;
    2963                 :        210 :   Dwarf_Off old_offset;
    2964                 :        210 :   size_t hsize;
    2965                 :            : 
    2966         [ +  + ]:       2310 :   while (dwarf_nextcu (dbg, old_offset = offset, &offset, &hsize, NULL, NULL, NULL) == 0)
    2967                 :            :     {
    2968                 :       2100 :       Dwarf_Die cudie_mem;
    2969                 :       2100 :       Dwarf_Die *cudie = dwarf_offdie (dbg, old_offset + hsize, &cudie_mem);
    2970                 :            : 
    2971         [ -  + ]:       2100 :       if (cudie == NULL)
    2972                 :         20 :         continue;
    2973         [ +  + ]:       2100 :       if (dwarf_tag (cudie) != DW_TAG_compile_unit)
    2974                 :         20 :         continue;
    2975                 :            : 
    2976         [ -  + ]:       2080 :       const char *cuname = dwarf_diename(cudie) ?: "unknown";
    2977                 :            : 
    2978                 :       2080 :       Dwarf_Files *files;
    2979                 :       2080 :       size_t nfiles;
    2980         [ -  + ]:       2080 :       if (dwarf_getsrcfiles (cudie, &files, &nfiles) != 0)
    2981                 :          0 :         continue;
    2982                 :            : 
    2983                 :            :       // extract DW_AT_comp_dir to resolve relative file names
    2984                 :       2080 :       const char *comp_dir = "";
    2985                 :       2080 :       const char *const *dirs;
    2986                 :       2080 :       size_t ndirs;
    2987         [ -  + ]:       2080 :       if (dwarf_getsrcdirs (files, &dirs, &ndirs) == 0 &&
    2988         [ -  + ]:       2080 :           dirs[0] != NULL)
    2989                 :            :         comp_dir = dirs[0];
    2990                 :            :       if (comp_dir == NULL)
    2991                 :            :         comp_dir = "";
    2992                 :            : 
    2993         [ +  + ]:       2080 :       if (verbose > 3)
    2994                 :        328 :         obatched(clog) << "searching for sources for cu=" << cuname << " comp_dir=" << comp_dir
    2995                 :        164 :                        << " #files=" << nfiles << " #dirs=" << ndirs << endl;
    2996                 :            : 
    2997   [ +  -  -  - ]:       2080 :       if (comp_dir[0] == '\0' && cuname[0] != '/')
    2998                 :            :         {
    2999                 :            :           // This is a common symptom for dwz-compressed debug files,
    3000                 :            :           // where the altdebug file cannot be resolved.
    3001         [ #  # ]:          0 :           if (verbose > 3)
    3002                 :          0 :             obatched(clog) << "skipping cu=" << cuname << " due to empty comp_dir" << endl;
    3003                 :          0 :           continue;
    3004                 :            :         }
    3005                 :            : 
    3006         [ +  + ]:      32486 :       for (size_t f = 1; f < nfiles; f++)
    3007                 :            :         {
    3008                 :      30406 :           const char *hat = dwarf_filesrc (files, f, NULL, NULL);
    3009         [ -  + ]:      30406 :           if (hat == NULL)
    3010                 :          0 :             continue;
    3011                 :            : 
    3012   [ +  +  -  + ]:      58040 :           if (string(hat) == "<built-in>") // gcc intrinsics, don't bother record
    3013                 :          0 :             continue;
    3014                 :            : 
    3015         [ +  + ]:      30406 :           string waldo;
    3016         [ +  + ]:      30406 :           if (hat[0] == '/') // absolute
    3017         [ -  + ]:      19292 :             waldo = (string (hat));
    3018         [ +  - ]:      11114 :           else if (comp_dir[0] != '\0') // comp_dir relative
    3019   [ -  +  -  +  :      19456 :             waldo = (string (comp_dir) + string("/") + string (hat));
          -  +  -  +  +  
                      + ]
    3020                 :            :           else
    3021                 :            :            {
    3022         [ #  # ]:          0 :              if (verbose > 3)
    3023                 :          0 :                obatched(clog) << "skipping hat=" << hat << " due to empty comp_dir" << endl;
    3024         [ #  # ]:          0 :              continue;
    3025                 :            :            }
    3026                 :            : 
    3027                 :            :           // NB: this is the 'waldo' that a dbginfo client will have
    3028                 :            :           // to supply for us to give them the file The comp_dir
    3029                 :            :           // prefixing is a definite complication.  Otherwise we'd
    3030                 :            :           // have to return a setof comp_dirs (one per CU!) with
    3031                 :            :           // corresponding filesrc[] names, instead of one absolute
    3032                 :            :           // resoved set.  Maybe we'll have to do that anyway.  XXX
    3033                 :            : 
    3034         [ +  + ]:      30406 :           if (verbose > 4)
    3035         [ -  + ]:        100 :             obatched(clog) << waldo
    3036         [ -  + ]:         50 :                            << (debug_sourcefiles.find(waldo)==debug_sourcefiles.end() ? " new" : " dup") <<  endl;
    3037                 :            : 
    3038         [ +  - ]:      30406 :           debug_sourcefiles.insert (waldo);
    3039                 :      30406 :         }
    3040                 :            :     }
    3041                 :            : 
    3042                 :        210 :   dwarf_end(dbg);
    3043         [ +  + ]:        210 :   if (altdbg)
    3044                 :         40 :     dwarf_end(altdbg);
    3045         [ +  + ]:        210 :   if (altdbg_fd >= 0)
    3046                 :         40 :     close(altdbg_fd);
    3047                 :            : }
    3048                 :            : 
    3049                 :            : 
    3050                 :            : 
    3051                 :            : static void
    3052                 :       1034 : elf_classify (int fd, bool &executable_p, bool &debuginfo_p, string &buildid, set<string>& debug_sourcefiles)
    3053                 :            : {
    3054                 :       1034 :   Elf *elf = elf_begin (fd, ELF_C_READ_MMAP_PRIVATE, NULL);
    3055         [ +  - ]:       1034 :   if (elf == NULL)
    3056                 :            :     return;
    3057                 :            : 
    3058                 :       1034 :   try // catch our types of errors and clean up the Elf* object
    3059                 :            :     {
    3060   [ +  -  +  + ]:       1034 :       if (elf_kind (elf) != ELF_K_ELF)
    3061                 :            :         {
    3062         [ +  - ]:        620 :           elf_end (elf);
    3063                 :        620 :           return;
    3064                 :            :         }
    3065                 :            : 
    3066                 :        414 :       GElf_Ehdr ehdr_storage;
    3067         [ +  - ]:        414 :       GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_storage);
    3068         [ -  + ]:        414 :       if (ehdr == NULL)
    3069                 :            :         {
    3070         [ #  # ]:          0 :           elf_end (elf);
    3071                 :            :           return;
    3072                 :            :         }
    3073                 :        414 :       auto elf_type = ehdr->e_type;
    3074                 :            : 
    3075                 :        414 :       const void *build_id; // elfutils-owned memory
    3076         [ +  - ]:        414 :       ssize_t sz = dwelf_elf_gnu_build_id (elf, & build_id);
    3077         [ -  + ]:        414 :       if (sz <= 0)
    3078                 :            :         {
    3079                 :            :           // It's not a diagnostic-worthy error for an elf file to lack build-id.
    3080                 :            :           // It might just be very old.
    3081         [ #  # ]:          0 :           elf_end (elf);
    3082                 :            :           return;
    3083                 :            :         }
    3084                 :            : 
    3085                 :            :       // build_id is a raw byte array; convert to hexadecimal *lowercase*
    3086                 :        414 :       unsigned char* build_id_bytes = (unsigned char*) build_id;
    3087         [ +  + ]:       8688 :       for (ssize_t idx=0; idx<sz; idx++)
    3088                 :            :         {
    3089         [ +  - ]:       8274 :           buildid += "0123456789abcdef"[build_id_bytes[idx] >> 4];
    3090         [ +  - ]:      16547 :           buildid += "0123456789abcdef"[build_id_bytes[idx] & 0xf];
    3091                 :            :         }
    3092                 :            : 
    3093                 :            :       // now decide whether it's an executable - namely, any allocatable section has
    3094                 :            :       // PROGBITS;
    3095         [ +  + ]:        414 :       if (elf_type == ET_EXEC || elf_type == ET_DYN)
    3096                 :            :         {
    3097                 :        363 :           size_t shnum;
    3098         [ +  - ]:        363 :           int rc = elf_getshdrnum (elf, &shnum);
    3099         [ -  + ]:        364 :           if (rc < 0)
    3100   [ #  #  #  # ]:          0 :             throw elfutils_exception(rc, "getshdrnum");
    3101                 :            : 
    3102                 :        364 :           executable_p = false;
    3103         [ +  + ]:       6985 :           for (size_t sc = 0; sc < shnum; sc++)
    3104                 :            :             {
    3105         [ +  - ]:       6809 :               Elf_Scn *scn = elf_getscn (elf, sc);
    3106         [ -  + ]:       6809 :               if (scn == NULL)
    3107                 :          0 :                 continue;
    3108                 :            : 
    3109                 :       6809 :               GElf_Shdr shdr_mem;
    3110         [ +  - ]:       6809 :               GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
    3111         [ -  + ]:       6809 :               if (shdr == NULL)
    3112                 :          0 :                 continue;
    3113                 :            : 
    3114                 :            :               // allocated (loadable / vm-addr-assigned) section with available content?
    3115   [ +  +  +  + ]:       6809 :               if ((shdr->sh_type == SHT_PROGBITS) && (shdr->sh_flags & SHF_ALLOC))
    3116                 :            :                 {
    3117         [ +  + ]:        188 :                   if (verbose > 4)
    3118   [ +  -  +  -  :         32 :                     obatched(clog) << "executable due to SHF_ALLOC SHT_PROGBITS sc=" << sc << endl;
                   +  - ]
    3119                 :        188 :                   executable_p = true;
    3120                 :        188 :                   break; // no need to keep looking for others
    3121                 :            :                 }
    3122                 :            :             } // iterate over sections
    3123                 :            :         } // executable_p classification
    3124                 :            : 
    3125                 :            :       // now decide whether it's a debuginfo - namely, if it has any .debug* or .zdebug* sections
    3126                 :            :       // logic mostly stolen from fweimer@redhat.com's elfclassify drafts
    3127                 :        415 :       size_t shstrndx;
    3128         [ +  - ]:        415 :       int rc = elf_getshdrstrndx (elf, &shstrndx);
    3129         [ -  + ]:        414 :       if (rc < 0)
    3130   [ #  #  #  # ]:          0 :         throw elfutils_exception(rc, "getshdrstrndx");
    3131                 :            : 
    3132                 :            :       Elf_Scn *scn = NULL;
    3133                 :            :       bool symtab_p = false;
    3134                 :            :       bool bits_alloc_p = false;
    3135                 :      21318 :       while (true)
    3136                 :            :         {
    3137         [ +  - ]:      10866 :           scn = elf_nextscn (elf, scn);
    3138         [ +  + ]:      10826 :           if (scn == NULL)
    3139                 :            :             break;
    3140                 :      10622 :           GElf_Shdr shdr_storage;
    3141         [ +  - ]:      10622 :           GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_storage);
    3142         [ -  + ]:      10621 :           if (shdr == NULL)
    3143                 :            :             break;
    3144         [ +  - ]:      10621 :           const char *section_name = elf_strptr (elf, shstrndx, shdr->sh_name);
    3145         [ -  + ]:      10662 :           if (section_name == NULL)
    3146                 :            :             break;
    3147         [ +  + ]:      10662 :           if (startswith (section_name, ".debug_line") ||
    3148         [ -  + ]:      10452 :               startswith (section_name, ".zdebug_line"))
    3149                 :            :             {
    3150                 :        210 :               debuginfo_p = true;
    3151         [ +  - ]:        210 :               if (scan_source_info)
    3152                 :        210 :                 dwarf_extract_source_paths (elf, debug_sourcefiles);
    3153                 :            :               break; // expecting only one .*debug_line, so no need to look for others
    3154                 :            :             }
    3155         [ +  + ]:      10452 :           else if (startswith (section_name, ".debug_") ||
    3156         [ +  # ]:       9749 :                    startswith (section_name, ".zdebug_"))
    3157                 :            :             {
    3158                 :        668 :               debuginfo_p = true;
    3159                 :            :               // NB: don't break; need to parse .debug_line for sources
    3160                 :            :             }
    3161         [ +  + ]:       9784 :           else if (shdr->sh_type == SHT_SYMTAB)
    3162                 :            :             {
    3163                 :            :               symtab_p = true;
    3164                 :            :             }
    3165                 :       9760 :           else if (shdr->sh_type != SHT_NOBITS
    3166         [ +  + ]:       9760 :                    && shdr->sh_type != SHT_NOTE
    3167         [ +  + ]:       4695 :                    && (shdr->sh_flags & SHF_ALLOC) != 0)
    3168                 :            :             {
    3169                 :      10452 :               bits_alloc_p = true;
    3170                 :            :             }
    3171                 :      10452 :         }
    3172                 :            : 
    3173                 :            :       // For more expansive elf/split-debuginfo classification, we
    3174                 :            :       // want to identify as debuginfo "strip -s"-produced files
    3175                 :            :       // without .debug_info* (like libicudata), but we don't want to
    3176                 :            :       // identify "strip -g" executables (with .symtab left there).
    3177         [ -  + ]:        414 :       if (symtab_p && !bits_alloc_p)
    3178                 :          0 :         debuginfo_p = true;
    3179                 :            :     }
    3180         [ #  # ]:          0 :   catch (const reportable_exception& e)
    3181                 :            :     {
    3182         [ #  # ]:          0 :       e.report(clog);
    3183                 :          0 :     }
    3184                 :        414 :   elf_end (elf);
    3185                 :            : }
    3186                 :            : 
    3187                 :            : 
    3188                 :            : // Intern the given file name in two parts (dirname & basename) and
    3189                 :            : // return the resulting file's id.
    3190                 :            : static int64_t
    3191                 :       8644 : register_file_name(sqlite_ps& ps_upsert_fileparts,
    3192                 :            :                    sqlite_ps& ps_upsert_file,
    3193                 :            :                    sqlite_ps& ps_lookup_file,
    3194                 :            :                    const string& name)
    3195                 :            : {
    3196                 :       8644 :   std::size_t slash = name.rfind('/');
    3197         [ +  + ]:       8643 :   string dirname, basename;
    3198         [ +  + ]:       8643 :   if (slash == std::string::npos)
    3199                 :            :     {
    3200         [ +  - ]:         90 :       dirname = "";
    3201         [ +  - ]:         90 :       basename = name;
    3202                 :            :     }
    3203                 :            :   else
    3204                 :            :     {
    3205   [ +  -  -  + ]:       8553 :       dirname = name.substr(0, slash);
    3206   [ +  -  -  +  :       8553 :       basename = name.substr(slash+1);
                   -  - ]
    3207                 :            :     }
    3208                 :            : 
    3209                 :            :   // intern the two substrings
    3210                 :       8643 :   ps_upsert_fileparts
    3211         [ +  - ]:       8643 :     .reset()
    3212         [ +  - ]:       8644 :     .bind(1, dirname)
    3213         [ +  - ]:       8643 :     .step_ok_done();
    3214                 :       8644 :   ps_upsert_fileparts
    3215         [ +  - ]:       8644 :     .reset()
    3216         [ +  - ]:       8644 :     .bind(1, basename)
    3217         [ +  - ]:       8644 :     .step_ok_done();
    3218                 :            : 
    3219                 :            :   // intern the tuple
    3220                 :       8644 :   ps_upsert_file
    3221         [ +  - ]:       8644 :     .reset()
    3222         [ +  - ]:       8644 :     .bind(1, dirname)
    3223         [ +  - ]:       8644 :     .bind(2, basename)
    3224         [ +  - ]:       8644 :     .step_ok_done();
    3225                 :            : 
    3226                 :            :   // look up the tuple's id
    3227                 :       8644 :   ps_lookup_file
    3228         [ +  - ]:       8644 :     .reset()
    3229         [ +  - ]:       8644 :     .bind(1, dirname)
    3230         [ +  - ]:       8644 :     .bind(2, basename);
    3231         [ +  - ]:       8644 :   int rc = ps_lookup_file.step();
    3232   [ -  +  -  -  :       8644 :   if (rc != SQLITE_ROW) throw sqlite_exception(rc, "step");
                   -  - ]
    3233                 :            :   
    3234         [ +  - ]:       8644 :   int64_t id = sqlite3_column_int64 (ps_lookup_file, 0);
    3235         [ +  - ]:       8644 :   ps_lookup_file.reset();
    3236         [ +  + ]:       8644 :   return id;
    3237         [ +  + ]:      16560 : }
    3238                 :            : 
    3239                 :            : 
    3240                 :            : 
    3241                 :            : static void
    3242                 :        728 : scan_source_file (const string& rps, const stat_t& st,
    3243                 :            :                   sqlite_ps& ps_upsert_buildids,
    3244                 :            :                   sqlite_ps& ps_upsert_fileparts,
    3245                 :            :                   sqlite_ps& ps_upsert_file,
    3246                 :            :                   sqlite_ps& ps_lookup_file,
    3247                 :            :                   sqlite_ps& ps_upsert_de,
    3248                 :            :                   sqlite_ps& ps_upsert_s,
    3249                 :            :                   sqlite_ps& ps_query,
    3250                 :            :                   sqlite_ps& ps_scan_done,
    3251                 :            :                   unsigned& fts_cached,
    3252                 :            :                   unsigned& fts_executable,
    3253                 :            :                   unsigned& fts_debuginfo,
    3254                 :            :                   unsigned& fts_sourcefiles)
    3255                 :            : {
    3256                 :        728 :   int64_t fileid = register_file_name(ps_upsert_fileparts, ps_upsert_file, ps_lookup_file, rps);
    3257                 :            : 
    3258                 :            :   /* See if we know of it already. */
    3259                 :        728 :   int rc = ps_query
    3260                 :        728 :     .reset()
    3261                 :        728 :     .bind(1, fileid)
    3262                 :        728 :     .bind(2, st.st_mtime)
    3263                 :        728 :     .step();
    3264                 :        728 :   ps_query.reset();
    3265         [ +  + ]:        728 :   if (rc == SQLITE_ROW) // i.e., a result, as opposed to DONE (no results)
    3266                 :            :     // no need to recheck a file/version we already know
    3267                 :            :     // specifically, no need to elf-begin a file we already determined is non-elf
    3268                 :            :     // (so is stored with buildid=NULL)
    3269                 :            :     {
    3270                 :        368 :       fts_cached++;
    3271                 :        368 :       return;
    3272                 :            :     }
    3273                 :            : 
    3274                 :        360 :   bool executable_p = false, debuginfo_p = false; // E and/or D
    3275         [ +  - ]:        360 :   string buildid;
    3276         [ +  - ]:        360 :   set<string> sourcefiles;
    3277                 :            : 
    3278         [ +  - ]:        360 :   int fd = open (rps.c_str(), O_RDONLY);
    3279                 :        360 :   try
    3280                 :            :     {
    3281         [ +  - ]:        360 :       if (fd >= 0)
    3282         [ +  - ]:        360 :         elf_classify (fd, executable_p, debuginfo_p, buildid, sourcefiles);
    3283                 :            :       else
    3284   [ #  #  #  #  :          0 :         throw libc_exception(errno, string("open ") + rps);
             #  #  #  # ]
    3285   [ +  -  +  -  :        720 :       add_metric ("scanned_bytes_total","source","file",
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    3286         [ +  - ]:        360 :                   st.st_size);
    3287   [ +  -  +  -  :        720 :       inc_metric ("scanned_files_total","source","file");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3288                 :            :     }
    3289                 :            :   // NB: we catch exceptions here too, so that we can
    3290                 :            :   // cache the corrupt-elf case (!executable_p &&
    3291                 :            :   // !debuginfo_p) just below, just as if we had an
    3292                 :            :   // EPERM error from open(2).
    3293         [ -  - ]:          0 :   catch (const reportable_exception& e)
    3294                 :            :     {
    3295         [ -  - ]:          0 :       e.report(clog);
    3296                 :          0 :     }
    3297                 :            : 
    3298         [ +  - ]:        360 :   if (fd >= 0)
    3299         [ +  - ]:        360 :     close (fd);
    3300                 :            : 
    3301         [ +  + ]:        360 :   if (buildid == "")
    3302                 :            :     {
    3303                 :            :       // no point storing an elf file without buildid
    3304                 :        298 :       executable_p = false;
    3305                 :        298 :       debuginfo_p = false;
    3306                 :            :     }
    3307                 :            :   else
    3308                 :            :     {
    3309                 :            :       // register this build-id in the interning table
    3310                 :         62 :       ps_upsert_buildids
    3311         [ +  - ]:         62 :         .reset()
    3312         [ +  - ]:         62 :         .bind(1, buildid)
    3313         [ +  - ]:         62 :         .step_ok_done();
    3314                 :            :     }
    3315                 :            : 
    3316         [ +  + ]:        360 :   if (executable_p)
    3317                 :         38 :     fts_executable ++;
    3318         [ +  + ]:        360 :   if (debuginfo_p)
    3319                 :         38 :     fts_debuginfo ++;
    3320   [ +  +  +  + ]:        360 :   if (executable_p || debuginfo_p)
    3321                 :            :     {
    3322                 :         62 :       ps_upsert_de
    3323         [ +  - ]:         62 :         .reset()
    3324         [ +  - ]:         62 :         .bind(1, buildid)
    3325   [ +  +  +  - ]:         86 :         .bind(2, debuginfo_p ? 1 : 0)
    3326   [ +  +  +  - ]:         86 :         .bind(3, executable_p ? 1 : 0)
    3327         [ +  - ]:         62 :         .bind(4, fileid)
    3328         [ +  - ]:         62 :         .bind(5, st.st_mtime)
    3329         [ +  - ]:         62 :         .step_ok_done();
    3330                 :            :     }
    3331         [ +  + ]:        360 :   if (executable_p)
    3332   [ +  -  +  -  :         76 :     inc_metric("found_executable_total","source","files");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3333         [ +  + ]:        360 :   if (debuginfo_p)
    3334   [ +  -  +  -  :         76 :     inc_metric("found_debuginfo_total","source","files");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3335                 :            : 
    3336   [ +  +  +  - ]:        398 :   if (sourcefiles.size() && buildid != "")
    3337                 :            :     {
    3338                 :         38 :       fts_sourcefiles += sourcefiles.size();
    3339                 :            : 
    3340         [ +  + ]:       3112 :       for (auto&& dwarfsrc : sourcefiles)
    3341                 :            :         {
    3342         [ +  - ]:       3074 :           char *srp = realpath(dwarfsrc.c_str(), NULL);
    3343         [ +  + ]:       3074 :           if (srp == NULL) // also if DWZ unresolved dwarfsrc=""
    3344                 :         36 :             continue; // unresolvable files are not a serious problem
    3345                 :            :           // throw libc_exception(errno, "fts/file realpath " + srcpath);
    3346         [ +  - ]:       3038 :           string srps = string(srp);
    3347                 :       3038 :           free (srp);
    3348                 :            : 
    3349                 :       3038 :           struct stat sfs;
    3350                 :       3038 :           rc = stat(srps.c_str(), &sfs);
    3351         [ -  + ]:       3038 :           if (rc != 0)
    3352         [ #  # ]:          0 :             continue;
    3353                 :            : 
    3354         [ +  - ]:       3038 :           if (verbose > 2)
    3355   [ +  -  +  -  :       9114 :             obatched(clog) << "recorded buildid=" << buildid << " file=" << srps
                   -  - ]
    3356   [ +  -  +  -  :       3038 :                            << " mtime=" << sfs.st_mtime
             +  -  +  - ]
    3357   [ +  -  +  -  :       3038 :                            << " as source " << dwarfsrc << endl;
                   +  - ]
    3358                 :            : 
    3359                 :            :           // PR25548: store canonicalized dwarfsrc path
    3360         [ +  - ]:       3038 :           string dwarfsrc_canon = canon_pathname (dwarfsrc);
    3361         [ +  + ]:       3038 :           if (dwarfsrc_canon != dwarfsrc)
    3362                 :            :             {
    3363         [ +  + ]:        508 :               if (verbose > 3)
    3364   [ +  -  +  -  :         20 :                 obatched(clog) << "canonicalized src=" << dwarfsrc << " alias=" << dwarfsrc_canon << endl;
          +  -  +  -  +  
                      - ]
    3365                 :            :             }
    3366                 :            : 
    3367         [ +  - ]:       3038 :           int64_t fileid1 = register_file_name (ps_upsert_fileparts, ps_upsert_file, ps_lookup_file, dwarfsrc_canon);
    3368         [ +  - ]:       3038 :           int64_t fileid2 = register_file_name (ps_upsert_fileparts, ps_upsert_file, ps_lookup_file, srps);
    3369                 :            : 
    3370                 :       3038 :           ps_upsert_s
    3371         [ +  - ]:       3038 :             .reset()
    3372         [ +  - ]:       3038 :             .bind(1, buildid)
    3373         [ +  - ]:       3038 :             .bind(2, fileid1)
    3374         [ +  - ]:       3038 :             .bind(3, fileid2)
    3375         [ +  - ]:       3038 :             .bind(4, sfs.st_mtime)
    3376         [ +  - ]:       3038 :             .step_ok_done();
    3377                 :            : 
    3378   [ +  -  +  -  :       6076 :           inc_metric("found_sourcerefs_total","source","files");
          +  -  +  -  -  
          +  -  +  +  -  
          -  -  -  -  -  
                      - ]
    3379         [ +  - ]:       6112 :         }
    3380                 :            :     }
    3381                 :            : 
    3382                 :        360 :   ps_scan_done
    3383         [ +  - ]:        360 :     .reset()
    3384         [ +  - ]:        360 :     .bind(1, fileid)
    3385         [ +  - ]:        360 :     .bind(2, st.st_mtime)
    3386         [ +  - ]:        360 :     .bind(3, st.st_size)
    3387         [ +  - ]:        360 :     .step_ok_done();
    3388                 :            : 
    3389         [ +  - ]:        360 :   if (verbose > 2)
    3390   [ +  -  +  - ]:       1080 :     obatched(clog) << "recorded buildid=" << buildid << " file=" << rps
    3391   [ +  -  +  -  :        360 :                    << " mtime=" << st.st_mtime << " atype="
             +  -  +  - ]
    3392                 :            :                    << (executable_p ? "E" : "")
    3393   [ +  -  +  +  :       1004 :                    << (debuginfo_p ? "D" : "") << endl;
          +  -  +  +  +  
                -  +  - ]
    3394         [ +  + ]:        422 : }
    3395                 :            : 
    3396                 :            : 
    3397                 :            : 
    3398                 :            : 
    3399                 :            : 
    3400                 :            : // Analyze given archive file of given age; record buildids / exec/debuginfo-ness of its
    3401                 :            : // constituent files with given upsert statements.
    3402                 :            : static void
    3403                 :        362 : archive_classify (const string& rps, string& archive_extension, int64_t archiveid,
    3404                 :            :                   sqlite_ps& ps_upsert_buildids, sqlite_ps& ps_upsert_fileparts, sqlite_ps& ps_upsert_file,
    3405                 :            :                   sqlite_ps& ps_lookup_file,
    3406                 :            :                   sqlite_ps& ps_upsert_de, sqlite_ps& ps_upsert_sref, sqlite_ps& ps_upsert_sdef,
    3407                 :            :                   time_t mtime,
    3408                 :            :                   unsigned& fts_executable, unsigned& fts_debuginfo, unsigned& fts_sref, unsigned& fts_sdef,
    3409                 :            :                   bool& fts_sref_complete_p)
    3410                 :            : {
    3411                 :        362 :   string archive_decoder = "/dev/null";
    3412         [ +  + ]:        896 :   for (auto&& arch : scan_archives)
    3413         [ +  + ]:        534 :     if (string_endswith(rps, arch.first))
    3414                 :            :       {
    3415         [ +  - ]:        362 :         archive_extension = arch.first;
    3416         [ +  - ]:        896 :         archive_decoder = arch.second;
    3417                 :            :       }
    3418                 :            : 
    3419                 :        362 :   FILE* fp;
    3420                 :        362 :   defer_dtor<FILE*,int>::dtor_fn dfn;
    3421         [ +  + ]:        362 :   if (archive_decoder != "cat")
    3422                 :            :     {
    3423   [ +  -  +  -  :         64 :       string popen_cmd = archive_decoder + " " + shell_escape(rps);
          +  -  -  +  -  
                -  -  - ]
    3424         [ +  - ]:         32 :       fp = popen (popen_cmd.c_str(), "r"); // "e" O_CLOEXEC?
    3425                 :         32 :       dfn = pclose;
    3426         [ -  + ]:         32 :       if (fp == NULL)
    3427   [ #  #  #  #  :          0 :         throw libc_exception (errno, string("popen ") + popen_cmd);
             #  #  #  # ]
    3428                 :         32 :     }
    3429                 :            :   else
    3430                 :            :     {
    3431         [ +  - ]:        330 :       fp = fopen (rps.c_str(), "r");
    3432                 :        330 :       dfn = fclose;
    3433         [ -  + ]:        330 :       if (fp == NULL)
    3434   [ #  #  #  #  :          0 :         throw libc_exception (errno, string("fopen ") + rps);
             #  #  #  # ]
    3435                 :            :     }
    3436                 :        362 :   defer_dtor<FILE*,int> fp_closer (fp, dfn);
    3437                 :            : 
    3438                 :        362 :   struct archive *a;
    3439         [ +  - ]:        362 :   a = archive_read_new();
    3440         [ -  + ]:        362 :   if (a == NULL)
    3441   [ #  #  #  # ]:          0 :     throw archive_exception("cannot create archive reader");
    3442                 :        362 :   defer_dtor<struct archive*,int> archive_closer (a, archive_read_free);
    3443                 :            : 
    3444         [ +  - ]:        362 :   int rc = archive_read_support_format_all(a);
    3445         [ -  + ]:        362 :   if (rc != ARCHIVE_OK)
    3446   [ #  #  #  # ]:          0 :     throw archive_exception(a, "cannot select all formats");
    3447         [ +  - ]:        362 :   rc = archive_read_support_filter_all(a);
    3448         [ -  + ]:        362 :   if (rc != ARCHIVE_OK)
    3449   [ #  #  #  # ]:          0 :     throw archive_exception(a, "cannot select all filters");
    3450                 :            : 
    3451         [ +  - ]:        362 :   rc = archive_read_open_FILE (a, fp);
    3452         [ -  + ]:        362 :   if (rc != ARCHIVE_OK)
    3453                 :            :     {
    3454   [ #  #  #  #  :          0 :       obatched(clog) << "cannot open archive from pipe " << rps << endl;
                   #  # ]
    3455   [ #  #  #  # ]:          0 :       throw archive_exception(a, "cannot open archive from pipe");
    3456                 :            :     }
    3457                 :            : 
    3458         [ +  + ]:        362 :   if (verbose > 3)
    3459   [ +  -  +  -  :        692 :     obatched(clog) << "libarchive scanning " << rps << " id " << archiveid << endl;
          +  -  +  -  +  
                      - ]
    3460                 :            : 
    3461                 :            :   bool any_exceptions = false;
    3462                 :       2564 :   while(1) // parse archive entries
    3463                 :            :     {
    3464         [ +  - ]:       2564 :     if (interrupted)
    3465                 :            :       break;
    3466                 :            : 
    3467                 :       2564 :     try
    3468                 :            :         {
    3469                 :       2564 :           struct archive_entry *e;
    3470         [ +  - ]:       2564 :           rc = archive_read_next_header (a, &e);
    3471         [ +  + ]:       2564 :           if (rc != ARCHIVE_OK)
    3472                 :            :             break;
    3473                 :            : 
    3474   [ +  -  +  + ]:       2202 :           if (! S_ISREG(archive_entry_mode (e))) // skip non-files completely
    3475                 :       1528 :             continue;
    3476                 :            : 
    3477         [ +  - ]:        674 :           string fn = canonicalized_archive_entry_pathname (e);
    3478                 :            : 
    3479         [ +  + ]:        674 :           if (verbose > 3)
    3480   [ +  -  +  -  :       1268 :             obatched(clog) << "libarchive checking " << fn << endl;
             +  -  -  - ]
    3481                 :            : 
    3482                 :            :           // extract this file to a temporary file
    3483                 :        674 :           char* tmppath = NULL;
    3484                 :        674 :           rc = asprintf (&tmppath, "%s/debuginfod.XXXXXX", tmpdir.c_str());
    3485         [ -  + ]:        674 :           if (rc < 0)
    3486   [ #  #  #  # ]:          0 :             throw libc_exception (ENOMEM, "cannot allocate tmppath");
    3487                 :        674 :           defer_dtor<void*,void> tmmpath_freer (tmppath, free);
    3488         [ +  - ]:        674 :           int fd = mkstemp (tmppath);
    3489         [ -  + ]:        674 :           if (fd < 0)
    3490   [ #  #  #  # ]:          0 :             throw libc_exception (errno, "cannot create temporary file");
    3491                 :        674 :           unlink (tmppath); // unlink now so OS will release the file as soon as we close the fd
    3492                 :        674 :           defer_dtor<int,int> minifd_closer (fd, close);
    3493                 :            : 
    3494         [ +  - ]:        674 :           rc = archive_read_data_into_fd (a, fd);
    3495         [ -  + ]:        674 :           if (rc != ARCHIVE_OK)
    3496   [ #  #  #  # ]:          0 :             throw archive_exception(a, "cannot extract file");
    3497                 :            : 
    3498                 :            :           // finally ... time to run elf_classify on this bad boy and update the database
    3499                 :        674 :           bool executable_p = false, debuginfo_p = false;
    3500         [ +  - ]:        674 :           string buildid;
    3501         [ +  - ]:        674 :           set<string> sourcefiles;
    3502         [ +  - ]:        674 :           elf_classify (fd, executable_p, debuginfo_p, buildid, sourcefiles);
    3503                 :            :           // NB: might throw
    3504                 :            : 
    3505         [ +  + ]:        674 :           if (buildid != "") // intern buildid
    3506                 :            :             {
    3507                 :        352 :               ps_upsert_buildids
    3508         [ +  - ]:        352 :                 .reset()
    3509         [ +  - ]:        352 :                 .bind(1, buildid)
    3510         [ +  - ]:        352 :                 .step_ok_done();
    3511                 :            :             }
    3512                 :            : 
    3513         [ +  - ]:        674 :           int64_t fileid = register_file_name (ps_upsert_fileparts, ps_upsert_file, ps_lookup_file, fn);
    3514                 :            : 
    3515         [ +  + ]:        674 :           if (sourcefiles.size() > 0) // sref records needed
    3516                 :            :             {
    3517                 :            :               // NB: we intern each source file once.  Once raw, as it
    3518                 :            :               // appears in the DWARF file list coming back from
    3519                 :            :               // elf_classify() - because it'll end up in the
    3520                 :            :               // _norm.artifactsrc column.  We don't also put another
    3521                 :            :               // version with a '.' at the front, even though that's
    3522                 :            :               // how rpm/cpio packs names, because we hide that from
    3523                 :            :               // the database for storage efficiency.
    3524                 :            : 
    3525         [ +  + ]:        616 :               for (auto&& s : sourcefiles)
    3526                 :            :                 {
    3527         [ -  + ]:        464 :                   if (s == "")
    3528                 :            :                     {
    3529                 :          0 :                       fts_sref_complete_p = false;
    3530                 :          0 :                       continue;
    3531                 :            :                     }
    3532                 :            : 
    3533                 :            :                   // PR25548: store canonicalized source path
    3534                 :        464 :                   const string& dwarfsrc = s;
    3535         [ +  - ]:        464 :                   string dwarfsrc_canon = canon_pathname (dwarfsrc);
    3536         [ +  + ]:        464 :                   if (dwarfsrc_canon != dwarfsrc)
    3537                 :            :                     {
    3538         [ +  - ]:         32 :                       if (verbose > 3)
    3539   [ +  -  +  -  :         64 :                         obatched(clog) << "canonicalized src=" << dwarfsrc << " alias=" << dwarfsrc_canon << endl;
          +  -  +  -  +  
                -  -  - ]
    3540                 :            :                     }
    3541                 :            : 
    3542         [ +  - ]:        464 :                   int64_t srcfileid = register_file_name(ps_upsert_fileparts, ps_upsert_file, ps_lookup_file,
    3543                 :            :                                                          dwarfsrc_canon);
    3544                 :            :                 
    3545                 :        464 :                   ps_upsert_sref
    3546         [ +  - ]:        464 :                     .reset()
    3547         [ +  - ]:        464 :                     .bind(1, buildid)
    3548         [ +  - ]:        464 :                     .bind(2, srcfileid)
    3549         [ +  - ]:        464 :                     .step_ok_done();
    3550                 :            : 
    3551         [ +  - ]:        464 :                   fts_sref ++;
    3552                 :        464 :                 }
    3553                 :            :             }
    3554                 :            : 
    3555         [ +  + ]:        674 :           if (executable_p)
    3556                 :        150 :             fts_executable ++;
    3557         [ +  + ]:        674 :           if (debuginfo_p)
    3558                 :        202 :             fts_debuginfo ++;
    3559                 :            : 
    3560   [ +  +  +  + ]:        674 :           if (executable_p || debuginfo_p)
    3561                 :            :             {
    3562                 :        352 :               ps_upsert_de
    3563         [ +  - ]:        352 :                 .reset()
    3564         [ +  - ]:        352 :                 .bind(1, buildid)
    3565   [ +  +  +  - ]:        502 :                 .bind(2, debuginfo_p ? 1 : 0)
    3566   [ +  +  +  - ]:        554 :                 .bind(3, executable_p ? 1 : 0)
    3567         [ +  - ]:        352 :                 .bind(4, archiveid)
    3568         [ +  - ]:        352 :                 .bind(5, mtime)
    3569         [ +  - ]:        352 :                 .bind(6, fileid)
    3570         [ +  - ]:        352 :                 .step_ok_done();
    3571                 :            :             }
    3572                 :            :           else // potential source - sdef record
    3573                 :            :             {
    3574                 :        322 :               fts_sdef ++;
    3575                 :        322 :               ps_upsert_sdef
    3576         [ +  - ]:        322 :                 .reset()
    3577         [ +  - ]:        322 :                 .bind(1, archiveid)
    3578         [ +  - ]:        322 :                 .bind(2, mtime)
    3579         [ +  - ]:        322 :                 .bind(3, fileid)
    3580         [ +  - ]:        322 :                 .step_ok_done();
    3581                 :            :             }
    3582                 :            : 
    3583   [ +  -  +  +  :        674 :           if ((verbose > 2) && (executable_p || debuginfo_p))
                   +  + ]
    3584   [ +  -  +  - ]:       1056 :             obatched(clog) << "recorded buildid=" << buildid << " rpm=" << rps << " file=" << fn
    3585   [ +  -  +  -  :        352 :                            << " mtime=" << mtime << " atype="
          +  -  +  -  +  
                -  +  - ]
    3586                 :            :                            << (executable_p ? "E" : "")
    3587                 :            :                            << (debuginfo_p ? "D" : "")
    3588   [ +  -  +  +  :        704 :                            << " sourcefiles=" << sourcefiles.size() << endl;
          +  -  +  +  +  
          -  +  -  +  -  
                   +  - ]
    3589                 :            : 
    3590   [ +  +  +  + ]:       1532 :         }
    3591         [ -  - ]:          0 :       catch (const reportable_exception& e)
    3592                 :            :         {
    3593         [ -  - ]:          0 :           e.report(clog);
    3594                 :          0 :           any_exceptions = true;
    3595                 :            :           // NB: but we allow the libarchive iteration to continue, in
    3596                 :            :           // case we can still gather some useful information.  That
    3597                 :            :           // would allow some webapi queries to work, until later when
    3598                 :            :           // this archive is rescanned.  (Its vitals won't go into the
    3599                 :            :           // _file_mtime_scanned table until after a successful scan.)
    3600                 :          0 :         }
    3601                 :            :     }
    3602                 :            : 
    3603         [ -  + ]:        362 :   if (any_exceptions)
    3604   [ #  #  #  # ]:          0 :     throw reportable_exception("exceptions encountered during archive scan");
    3605         [ +  + ]:        378 : }
    3606                 :            : 
    3607                 :            : 
    3608                 :            : 
    3609                 :            : // scan for archive files such as .rpm
    3610                 :            : static void
    3611                 :        702 : scan_archive_file (const string& rps, const stat_t& st,
    3612                 :            :                    sqlite_ps& ps_upsert_buildids,
    3613                 :            :                    sqlite_ps& ps_upsert_fileparts,
    3614                 :            :                    sqlite_ps& ps_upsert_file,
    3615                 :            :                    sqlite_ps& ps_lookup_file,
    3616                 :            :                    sqlite_ps& ps_upsert_de,
    3617                 :            :                    sqlite_ps& ps_upsert_sref,
    3618                 :            :                    sqlite_ps& ps_upsert_sdef,
    3619                 :            :                    sqlite_ps& ps_query,
    3620                 :            :                    sqlite_ps& ps_scan_done,
    3621                 :            :                    unsigned& fts_cached,
    3622                 :            :                    unsigned& fts_executable,
    3623                 :            :                    unsigned& fts_debuginfo,
    3624                 :            :                    unsigned& fts_sref,
    3625                 :            :                    unsigned& fts_sdef)
    3626                 :            : {
    3627                 :            :   // intern the archive file name
    3628                 :        702 :   int64_t archiveid = register_file_name (ps_upsert_fileparts, ps_upsert_file, ps_lookup_file, rps);
    3629                 :            : 
    3630                 :            :   /* See if we know of it already. */
    3631                 :        702 :   int rc = ps_query
    3632                 :        702 :     .reset()
    3633                 :        702 :     .bind(1, archiveid)
    3634                 :        702 :     .bind(2, st.st_mtime)
    3635                 :        702 :     .step();
    3636                 :        702 :   ps_query.reset();
    3637         [ +  + ]:        702 :   if (rc == SQLITE_ROW) // i.e., a result, as opposed to DONE (no results)
    3638                 :            :     // no need to recheck a file/version we already know
    3639                 :            :     // specifically, no need to parse this archive again, since we already have
    3640                 :            :     // it as a D or E or S record,
    3641                 :            :     // (so is stored with buildid=NULL)
    3642                 :            :     {
    3643                 :        340 :       fts_cached ++;
    3644                 :        340 :       return;
    3645                 :            :     }
    3646                 :            : 
    3647                 :            :   // extract the archive contents
    3648                 :        362 :   unsigned my_fts_executable = 0, my_fts_debuginfo = 0, my_fts_sref = 0, my_fts_sdef = 0;
    3649                 :        362 :   bool my_fts_sref_complete_p = true;
    3650                 :        362 :   bool any_exceptions = false;
    3651                 :        362 :   try
    3652                 :            :     {
    3653         [ +  - ]:        362 :       string archive_extension;
    3654                 :        362 :       archive_classify (rps, archive_extension, archiveid,
    3655                 :            :                         ps_upsert_buildids, ps_upsert_fileparts, ps_upsert_file, ps_lookup_file,
    3656                 :            :                         ps_upsert_de, ps_upsert_sref, ps_upsert_sdef, // dalt
    3657         [ +  - ]:        362 :                         st.st_mtime,
    3658                 :            :                         my_fts_executable, my_fts_debuginfo, my_fts_sref, my_fts_sdef,
    3659                 :            :                         my_fts_sref_complete_p);
    3660   [ +  -  +  -  :        724 :       add_metric ("scanned_bytes_total","source",archive_extension + " archive",
          +  -  -  +  +  
             +  -  -  -  
                      - ]
    3661         [ +  - ]:        362 :                   st.st_size);
    3662   [ +  -  +  -  :        724 :       inc_metric ("scanned_files_total","source",archive_extension + " archive");
          +  -  +  -  -  
          +  +  +  -  -  
                   -  - ]
    3663   [ +  -  +  -  :        724 :       add_metric("found_debuginfo_total","source",archive_extension + " archive",
          +  -  +  -  -  
          +  +  +  -  -  
                   -  - ]
    3664                 :            :                  my_fts_debuginfo);
    3665   [ +  -  +  -  :        724 :       add_metric("found_executable_total","source",archive_extension + " archive",
          +  -  +  -  -  
          +  +  +  -  -  
                   -  - ]
    3666                 :            :                  my_fts_executable);
    3667   [ +  -  +  -  :        740 :       add_metric("found_sourcerefs_total","source",archive_extension + " archive",
          +  -  +  -  -  
          +  +  +  -  +  
          -  -  -  -  -  
                      - ]
    3668                 :            :                  my_fts_sref);
    3669                 :        362 :     }
    3670         [ -  - ]:          0 :   catch (const reportable_exception& e)
    3671                 :            :     {
    3672         [ -  - ]:          0 :       e.report(clog);
    3673                 :          0 :       any_exceptions = true;
    3674                 :          0 :     }
    3675                 :            : 
    3676         [ +  - ]:        362 :   if (verbose > 2)
    3677         [ +  - ]:       1086 :     obatched(clog) << "scanned archive=" << rps
    3678   [ +  -  +  - ]:        362 :                    << " mtime=" << st.st_mtime
    3679         [ +  - ]:        362 :                    << " executables=" << my_fts_executable
    3680   [ +  -  +  - ]:        362 :                    << " debuginfos=" << my_fts_debuginfo
    3681   [ +  -  +  - ]:        362 :                    << " srefs=" << my_fts_sref
    3682   [ +  -  +  - ]:        362 :                    << " sdefs=" << my_fts_sdef
    3683   [ +  -  +  -  :        362 :                    << " exceptions=" << any_exceptions
             +  -  +  - ]
    3684                 :        362 :                    << endl;
    3685                 :            : 
    3686                 :        362 :   fts_executable += my_fts_executable;
    3687                 :        362 :   fts_debuginfo += my_fts_debuginfo;
    3688                 :        362 :   fts_sref += my_fts_sref;
    3689                 :        362 :   fts_sdef += my_fts_sdef;
    3690                 :            : 
    3691         [ -  + ]:        362 :   if (any_exceptions)
    3692   [ #  #  #  # ]:          0 :     throw reportable_exception("exceptions encountered during archive scan");
    3693                 :            : 
    3694         [ +  - ]:        362 :   if (my_fts_sref_complete_p) // leave incomplete?
    3695                 :        362 :     ps_scan_done
    3696                 :        362 :       .reset()
    3697                 :        362 :       .bind(1, archiveid)
    3698                 :        362 :       .bind(2, st.st_mtime)
    3699                 :        362 :       .bind(3, st.st_size)
    3700                 :        362 :       .step_ok_done();
    3701                 :            : }
    3702                 :            : 
    3703                 :            : 
    3704                 :            : 
    3705                 :            : ////////////////////////////////////////////////////////////////////////
    3706                 :            : 
    3707                 :            : 
    3708                 :            : 
    3709                 :            : // The thread that consumes file names off of the scanq.  We hold
    3710                 :            : // the persistent sqlite_ps's at this level and delegate file/archive
    3711                 :            : // scanning to other functions.
    3712                 :            : static void
    3713                 :        256 : scan ()
    3714                 :            : {
    3715                 :            :   // all the prepared statements fit to use, the _f_ set:
    3716   [ +  -  +  -  :        512 :   sqlite_ps ps_f_upsert_buildids (db, "file-buildids-intern", "insert or ignore into " BUILDIDS "_buildids VALUES (NULL, ?);");
             +  -  -  - ]
    3717   [ +  -  +  -  :        512 :   sqlite_ps ps_f_upsert_fileparts (db, "file-fileparts-intern", "insert or ignore into " BUILDIDS "_fileparts VALUES (NULL, ?);");
          +  -  +  -  -  
                      - ]
    3718         [ +  - ]:        256 :   sqlite_ps ps_f_upsert_file (db, "file-file-intern", "insert or ignore into " BUILDIDS "_files VALUES (NULL, \n"
    3719                 :            :                               "(select id from " BUILDIDS "_fileparts where name = ?),\n"
    3720   [ +  -  +  -  :        512 :                               "(select id from " BUILDIDS "_fileparts where name = ?));");
          +  -  +  -  -  
                      - ]
    3721         [ +  - ]:        256 :   sqlite_ps ps_f_lookup_file (db, "file-file-lookup",
    3722                 :            :                               "select f.id\n"
    3723                 :            :                               " from " BUILDIDS "_files f, " BUILDIDS "_fileparts p1, " BUILDIDS "_fileparts p2 \n"
    3724   [ +  -  +  -  :        512 :                               " where f.dirname = p1.id and f.basename = p2.id and p1.name = ? and p2.name = ?;\n");
          +  -  +  -  -  
                      - ]
    3725         [ +  - ]:        256 :   sqlite_ps ps_f_upsert_de (db, "file-de-upsert",
    3726                 :            :                           "insert or ignore into " BUILDIDS "_f_de "
    3727                 :            :                           "(buildid, debuginfo_p, executable_p, file, mtime) "
    3728                 :            :                           "values ((select id from " BUILDIDS "_buildids where hex = ?),"
    3729   [ +  -  +  -  :        512 :                             "        ?,?,?,?);");
          +  -  +  -  -  
                      - ]
    3730         [ +  - ]:        256 :   sqlite_ps ps_f_upsert_s (db, "file-s-upsert",
    3731                 :            :                          "insert or ignore into " BUILDIDS "_f_s "
    3732                 :            :                          "(buildid, artifactsrc, file, mtime) "
    3733                 :            :                          "values ((select id from " BUILDIDS "_buildids where hex = ?),"
    3734   [ +  -  +  -  :        512 :                          "      ?,?,?);");
          +  -  +  -  -  
                      - ]
    3735         [ +  - ]:        256 :   sqlite_ps ps_f_query (db, "file-negativehit-find",
    3736                 :            :                         "select 1 from " BUILDIDS "_file_mtime_scanned where sourcetype = 'F' "
    3737   [ +  -  +  -  :        512 :                         "and file = ? and mtime = ?;");
          +  -  +  -  -  
                      - ]
    3738         [ +  - ]:        256 :   sqlite_ps ps_f_scan_done (db, "file-scanned",
    3739                 :            :                           "insert or ignore into " BUILDIDS "_file_mtime_scanned (sourcetype, file, mtime, size)"
    3740   [ +  -  +  -  :        512 :                           "values ('F', ?,?,?);");
          +  -  +  -  -  
                      - ]
    3741                 :            : 
    3742                 :            :   // and now for the _r_ set
    3743   [ +  -  +  -  :        512 :   sqlite_ps ps_r_upsert_buildids (db, "rpm-buildid-intern", "insert or ignore into " BUILDIDS "_buildids VALUES (NULL, ?);");
          +  -  +  -  -  
                      - ]
    3744   [ +  -  +  -  :        512 :   sqlite_ps ps_r_upsert_fileparts (db, "rpm-fileparts-intern", "insert or ignore into " BUILDIDS "_fileparts VALUES (NULL, ?);");
          +  -  +  -  -  
                      - ]
    3745         [ +  - ]:        256 :   sqlite_ps ps_r_upsert_file (db, "rpm-file-intern", "insert or ignore into " BUILDIDS "_files VALUES (NULL, \n"
    3746                 :            :                               "(select id from " BUILDIDS "_fileparts where name = ?),\n"
    3747   [ +  -  +  -  :        512 :                               "(select id from " BUILDIDS "_fileparts where name = ?));");
          +  -  +  -  -  
                      - ]
    3748         [ +  - ]:        256 :   sqlite_ps ps_r_lookup_file (db, "rpm-file-lookup",
    3749                 :            :                               "select f.id\n"
    3750                 :            :                               " from " BUILDIDS "_files f, " BUILDIDS "_fileparts p1, " BUILDIDS "_fileparts p2 \n"
    3751   [ +  -  +  -  :        512 :                               " where f.dirname = p1.id and f.basename = p2.id and p1.name = ? and p2.name = ?;\n");
          +  -  +  -  -  
                      - ]
    3752         [ +  - ]:        256 :   sqlite_ps ps_r_upsert_de (db, "rpm-de-insert",
    3753                 :            :                           "insert or ignore into " BUILDIDS "_r_de (buildid, debuginfo_p, executable_p, file, mtime, content) values ("
    3754   [ +  -  +  -  :        512 :                           "(select id from " BUILDIDS "_buildids where hex = ?), ?, ?, ?, ?, ?);");
          +  -  +  -  -  
                      - ]
    3755         [ +  - ]:        256 :   sqlite_ps ps_r_upsert_sref (db, "rpm-sref-insert",
    3756                 :            :                             "insert or ignore into " BUILDIDS "_r_sref (buildid, artifactsrc) values ("
    3757                 :            :                             "(select id from " BUILDIDS "_buildids where hex = ?), "
    3758   [ +  -  +  -  :        512 :                             "?);");
          +  -  +  -  -  
                      - ]
    3759         [ +  - ]:        256 :   sqlite_ps ps_r_upsert_sdef (db, "rpm-sdef-insert",
    3760                 :            :                             "insert or ignore into " BUILDIDS "_r_sdef (file, mtime, content) values ("
    3761   [ +  -  +  -  :        512 :                             "?, ?, ?);");
          +  -  +  -  -  
                      - ]
    3762         [ +  - ]:        256 :   sqlite_ps ps_r_query (db, "rpm-negativehit-query",
    3763                 :            :                       "select 1 from " BUILDIDS "_file_mtime_scanned where "
    3764   [ +  -  +  -  :        512 :                       "sourcetype = 'R' and file = ? and mtime = ?;");
          +  -  +  -  -  
                      - ]
    3765         [ +  - ]:        256 :   sqlite_ps ps_r_scan_done (db, "rpm-scanned",
    3766                 :            :                           "insert or ignore into " BUILDIDS "_file_mtime_scanned (sourcetype, file, mtime, size)"
    3767   [ +  -  +  -  :        512 :                           "values ('R', ?, ?, ?);");
          +  -  +  -  -  
                      - ]
    3768                 :            :   
    3769                 :            : 
    3770                 :        256 :   unsigned fts_cached = 0, fts_executable = 0, fts_debuginfo = 0, fts_sourcefiles = 0;
    3771                 :        256 :   unsigned fts_sref = 0, fts_sdef = 0;
    3772                 :            : 
    3773   [ +  -  +  -  :        512 :   add_metric("thread_count", "role", "scan", 1);
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3774   [ +  -  +  -  :        512 :   add_metric("thread_busy", "role", "scan", 1);
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3775         [ +  + ]:       1452 :   while (! interrupted)
    3776                 :            :     {
    3777         [ +  - ]:       1196 :       scan_payload p;
    3778                 :            : 
    3779   [ +  -  +  -  :       2392 :       add_metric("thread_busy", "role", "scan", -1);
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3780                 :            :       // NB: threads may be blocked within either of these two waiting
    3781                 :            :       // states, if the work queue happens to run dry.  That's OK.
    3782   [ +  -  +  - ]:       1196 :       if (scan_barrier) scan_barrier->count();
    3783         [ +  - ]:       1196 :       bool gotone = scanq.wait_front(p);
    3784   [ +  -  +  -  :       2392 :       add_metric("thread_busy", "role", "scan", 1);
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3785                 :            : 
    3786   [ +  +  -  + ]:       1196 :       if (! gotone) continue; // go back to waiting
    3787                 :            : 
    3788                 :        940 :       try
    3789                 :            :         {
    3790                 :        940 :           bool scan_archive = false;
    3791         [ +  + ]:       2234 :           for (auto&& arch : scan_archives)
    3792         [ +  + ]:       1294 :             if (string_endswith(p.first, arch.first))
    3793                 :        702 :               scan_archive = true;
    3794                 :            : 
    3795         [ +  + ]:        940 :           if (scan_archive)
    3796         [ +  - ]:        702 :             scan_archive_file (p.first, p.second,
    3797                 :            :                                ps_r_upsert_buildids,
    3798                 :            :                                ps_r_upsert_fileparts,
    3799                 :            :                                ps_r_upsert_file,
    3800                 :            :                                ps_r_lookup_file,
    3801                 :            :                                ps_r_upsert_de,
    3802                 :            :                                ps_r_upsert_sref,
    3803                 :            :                                ps_r_upsert_sdef,
    3804                 :            :                                ps_r_query,
    3805                 :            :                                ps_r_scan_done,
    3806                 :            :                                fts_cached,
    3807                 :            :                                fts_executable,
    3808                 :            :                                fts_debuginfo,
    3809                 :            :                                fts_sref,
    3810                 :            :                                fts_sdef);
    3811                 :            : 
    3812         [ +  + ]:        940 :           if (scan_files) // NB: maybe "else if" ?
    3813         [ +  - ]:        728 :             scan_source_file (p.first, p.second,
    3814                 :            :                               ps_f_upsert_buildids,
    3815                 :            :                               ps_f_upsert_fileparts,
    3816                 :            :                               ps_f_upsert_file,
    3817                 :            :                               ps_f_lookup_file,
    3818                 :            :                               ps_f_upsert_de,
    3819                 :            :                               ps_f_upsert_s,
    3820                 :            :                               ps_f_query,
    3821                 :            :                               ps_f_scan_done,
    3822                 :            :                               fts_cached, fts_executable, fts_debuginfo, fts_sourcefiles);
    3823                 :            :         }
    3824         [ -  - ]:          0 :       catch (const reportable_exception& e)
    3825                 :            :         {
    3826         [ -  - ]:          0 :           e.report(cerr);
    3827                 :          0 :         }
    3828                 :            : 
    3829         [ +  - ]:        940 :       scanq.done_front(); // let idlers run
    3830                 :            :       
    3831                 :        940 :       if (fts_cached || fts_executable || fts_debuginfo || fts_sourcefiles || fts_sref || fts_sdef)
    3832                 :            :         {} // NB: not just if a successful scan - we might have encountered -ENOSPC & failed
    3833   [ +  -  +  - ]:        940 :       (void) statfs_free_enough_p(db_path, "database"); // report sqlite filesystem size
    3834   [ +  -  +  - ]:        940 :       (void) statfs_free_enough_p(tmpdir, "tmpdir"); // this too, in case of fdcache/tmpfile usage
    3835                 :            : 
    3836                 :            :       // finished a scanning step -- not a "loop", because we just
    3837                 :            :       // consume the traversal loop's work, whenever
    3838   [ +  -  +  -  :       1880 :       inc_metric("thread_work_total","role","scan");
          +  -  +  -  -  
          +  -  +  +  -  
          -  -  -  -  -  
                      - ]
    3839                 :       1196 :     }
    3840                 :            : 
    3841   [ +  -  +  -  :        512 :   add_metric("thread_busy", "role", "scan", -1);
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3842                 :        256 : }
    3843                 :            : 
    3844                 :            : 
    3845                 :            : // Use this function as the thread entry point, so it can catch our
    3846                 :            : // fleet of exceptions (incl. the sqlite_ps ctors) and report.
    3847                 :            : static void*
    3848                 :        256 : thread_main_scanner (void* arg)
    3849                 :            : {
    3850                 :        256 :   (void) arg;
    3851         [ +  + ]:        768 :   while (! interrupted)
    3852                 :        256 :     try
    3853                 :            :       {
    3854         [ +  - ]:        256 :         scan();
    3855                 :            :       }
    3856         [ -  - ]:          0 :     catch (const reportable_exception& e)
    3857                 :            :       {
    3858         [ -  - ]:          0 :         e.report(cerr);
    3859                 :          0 :       }
    3860                 :        256 :   return 0;
    3861                 :            : }
    3862                 :            : 
    3863                 :            : 
    3864                 :            : 
    3865                 :            : // The thread that traverses all the source_paths and enqueues all the
    3866                 :            : // matching files into the file/archive scan queue.
    3867                 :            : static void
    3868                 :        118 : scan_source_paths()
    3869                 :            : {
    3870                 :            :   // NB: fedora 31 glibc/fts(3) crashes inside fts_read() on empty
    3871                 :            :   // path list.
    3872         [ +  + ]:        118 :   if (source_paths.empty())
    3873                 :          2 :     return;
    3874                 :            : 
    3875                 :            :   // Turn the source_paths into an fts(3)-compatible char**.  Since
    3876                 :            :   // source_paths[] does not change after argv processing, the
    3877                 :            :   // c_str()'s are safe to keep around awile.
    3878                 :        116 :   vector<const char *> sps;
    3879         [ +  + ]:        314 :   for (auto&& sp: source_paths)
    3880         [ +  - ]:        198 :     sps.push_back(sp.c_str());
    3881   [ +  -  -  - ]:        116 :   sps.push_back(NULL);
    3882                 :            : 
    3883   [ +  +  +  - ]:        218 :   FTS *fts = fts_open ((char * const *)sps.data(),
    3884                 :            :                       (traverse_logical ? FTS_LOGICAL : FTS_PHYSICAL|FTS_XDEV)
    3885                 :            :                       | FTS_NOCHDIR /* multithreaded */,
    3886                 :            :                       NULL);
    3887         [ -  + ]:        116 :   if (fts == NULL)
    3888   [ #  #  #  # ]:          0 :     throw libc_exception(errno, "cannot fts_open");
    3889                 :        116 :   defer_dtor<FTS*,int> fts_cleanup (fts, fts_close);
    3890                 :            : 
    3891                 :        116 :   struct timespec ts_start, ts_end;
    3892                 :        116 :   clock_gettime (CLOCK_MONOTONIC, &ts_start);
    3893                 :        116 :   unsigned fts_scanned = 0, fts_regex = 0;
    3894                 :            : 
    3895                 :        116 :   FTSENT *f;
    3896   [ +  -  +  + ]:       2116 :   while ((f = fts_read (fts)) != NULL)
    3897                 :            :   {
    3898         [ +  - ]:       1884 :     if (interrupted) break;
    3899                 :            : 
    3900         [ -  + ]:       1884 :     if (sigusr2 != forced_groom_count) // stop early if groom triggered
    3901                 :            :       {
    3902         [ #  # ]:          0 :         scanq.clear(); // clear previously issued work for scanner threads
    3903                 :            :         break;
    3904                 :            :       }
    3905                 :            : 
    3906                 :       1884 :     fts_scanned ++;
    3907                 :            : 
    3908         [ +  - ]:       1884 :     if (verbose > 2)
    3909   [ +  -  +  -  :       3768 :       obatched(clog) << "fts traversing " << f->fts_path << endl;
                   +  - ]
    3910                 :            : 
    3911   [ +  +  +  +  :       1884 :     switch (f->fts_info)
                      + ]
    3912                 :            :       {
    3913                 :       1028 :       case FTS_F:
    3914                 :       1028 :         {
    3915                 :            :           /* Found a file.  Convert it to an absolute path, so
    3916                 :            :              the buildid database does not have relative path
    3917                 :            :              names that are unresolvable from a subsequent run
    3918                 :            :              in a different cwd. */
    3919         [ +  - ]:       1028 :           char *rp = realpath(f->fts_path, NULL);
    3920         [ -  + ]:       1028 :           if (rp == NULL)
    3921                 :          0 :             continue; // ignore dangling symlink or such
    3922         [ +  - ]:       1028 :           string rps = string(rp);
    3923                 :       1028 :           free (rp);
    3924                 :            : 
    3925         [ +  - ]:       1028 :           bool ri = !regexec (&file_include_regex, rps.c_str(), 0, 0, 0);
    3926         [ +  - ]:       1028 :           bool rx = !regexec (&file_exclude_regex, rps.c_str(), 0, 0, 0);
    3927         [ +  + ]:       1028 :           if (!ri || rx)
    3928                 :            :             {
    3929         [ +  - ]:         88 :               if (verbose > 3)
    3930         [ +  - ]:        176 :                 obatched(clog) << "fts skipped by regex "
    3931   [ +  +  +  -  :         96 :                                << (!ri ? "I" : "") << (rx ? "X" : "") << endl;
          +  +  +  -  +  
                      - ]
    3932                 :         88 :               fts_regex ++;
    3933         [ +  + ]:         88 :               if (!ri)
    3934   [ +  -  +  -  :          8 :                 inc_metric("traversed_total","type","file-skipped-I");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3935         [ +  + ]:         88 :               if (rx)
    3936   [ +  -  +  -  :        168 :                 inc_metric("traversed_total","type","file-skipped-X");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3937                 :            :             }
    3938                 :            :           else
    3939                 :            :             {
    3940   [ +  -  +  - ]:        940 :               scanq.push_back (make_pair(rps, *f->fts_statp));
    3941   [ +  -  +  -  :       1880 :               inc_metric("traversed_total","type","file");
          +  -  +  -  -  
          +  -  +  -  -  
             -  -  -  - ]
    3942                 :            :             }
    3943                 :          0 :         }
    3944                 :       1028 :         break;
    3945                 :            : 
    3946                 :          4 :       case FTS_ERR:
    3947                 :          4 :       case FTS_NS:
    3948                 :            :         // report on some types of errors because they may reflect fixable misconfiguration
    3949                 :          4 :         {
    3950   [ +  -  +  -  :          8 :           auto x = libc_exception(f->fts_errno, string("fts traversal ") + string(f->fts_path));
          +  -  +  -  -  
             +  -  +  -  
                      - ]
    3951         [ +  - ]:          4 :           x.report(cerr);
    3952                 :          0 :         }
    3953   [ +  -  +  -  :          8 :         inc_metric("traversed_total","type","error");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3954                 :          4 :         break;
    3955                 :            : 
    3956                 :         12 :       case FTS_SL: // ignore, but count because debuginfod -L would traverse these
    3957   [ +  -  +  -  :         24 :         inc_metric("traversed_total","type","symlink");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3958                 :         12 :         break;
    3959                 :            : 
    3960                 :        420 :       case FTS_D: // ignore
    3961   [ +  -  +  -  :        840 :         inc_metric("traversed_total","type","directory");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3962                 :        420 :         break;
    3963                 :            : 
    3964                 :        420 :       default: // ignore
    3965   [ +  -  +  -  :        840 :         inc_metric("traversed_total","type","other");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    3966                 :        420 :         break;
    3967                 :            :       }
    3968                 :            :   }
    3969                 :        116 :   clock_gettime (CLOCK_MONOTONIC, &ts_end);
    3970                 :        116 :   double deltas = (ts_end.tv_sec - ts_start.tv_sec) + (ts_end.tv_nsec - ts_start.tv_nsec)/1.e9;
    3971                 :            : 
    3972   [ +  -  +  -  :        348 :   obatched(clog) << "fts traversed source paths in " << deltas << "s, scanned=" << fts_scanned
             +  -  +  - ]
    3973   [ +  -  +  -  :        116 :                  << ", regex-skipped=" << fts_regex << endl;
                   +  - ]
    3974         [ +  - ]:        232 : }
    3975                 :            : 
    3976                 :            : 
    3977                 :            : static void*
    3978                 :         64 : thread_main_fts_source_paths (void* arg)
    3979                 :            : {
    3980                 :         64 :   (void) arg; // ignore; we operate on global data
    3981                 :            : 
    3982   [ +  -  +  -  :        128 :   set_metric("thread_tid", "role","traverse", tid());
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    3983   [ +  -  +  -  :        128 :   add_metric("thread_count", "role", "traverse", 1);
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    3984                 :            : 
    3985                 :         64 :   time_t last_rescan = 0;
    3986                 :            : 
    3987         [ +  - ]:        300 :   while (! interrupted)
    3988                 :            :     {
    3989                 :        300 :       sleep (1);
    3990                 :        300 :       scanq.wait_idle(); // don't start a new traversal while scanners haven't finished the job
    3991                 :        300 :       scanq.done_idle(); // release the hounds
    3992         [ +  + ]:        300 :       if (interrupted) break;
    3993                 :            : 
    3994                 :        236 :       time_t now = time(NULL);
    3995                 :        236 :       bool rescan_now = false;
    3996         [ +  + ]:        236 :       if (last_rescan == 0) // at least one initial rescan is documented even for -t0
    3997                 :         62 :         rescan_now = true;
    3998   [ +  +  +  + ]:        236 :       if (rescan_s > 0 && (long)now > (long)(last_rescan + rescan_s))
    3999                 :        236 :         rescan_now = true;
    4000         [ +  + ]:        236 :       if (sigusr1 != forced_rescan_count)
    4001                 :            :         {
    4002                 :         62 :           forced_rescan_count = sigusr1;
    4003                 :         62 :           rescan_now = true;
    4004                 :            :         }
    4005         [ +  + ]:        236 :       if (rescan_now)
    4006                 :            :         {
    4007   [ +  -  +  -  :        236 :           set_metric("thread_busy", "role","traverse", 1);
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    4008                 :        118 :           try
    4009                 :            :             {
    4010         [ +  - ]:        118 :               scan_source_paths();
    4011                 :            :             }
    4012         [ -  - ]:          0 :           catch (const reportable_exception& e)
    4013                 :            :             {
    4014         [ -  - ]:          0 :               e.report(cerr);
    4015                 :          0 :             }
    4016                 :        118 :           last_rescan = time(NULL); // NB: now was before scanning
    4017                 :            :           // finished a traversal loop
    4018   [ +  -  +  -  :        236 :           inc_metric("thread_work_total", "role","traverse");
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    4019   [ +  -  +  -  :        236 :           set_metric("thread_busy", "role","traverse", 0);
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    4020                 :            :         }
    4021                 :            :     }
    4022                 :            : 
    4023                 :         64 :   return 0;
    4024                 :            : }
    4025                 :            : 
    4026                 :            : 
    4027                 :            : 
    4028                 :            : ////////////////////////////////////////////////////////////////////////
    4029                 :            : 
    4030                 :            : static void
    4031                 :         70 : database_stats_report()
    4032                 :            : {
    4033                 :         70 :   sqlite_ps ps_query (db, "database-overview",
    4034   [ +  -  +  -  :        140 :                       "select label,quantity from " BUILDIDS "_stats");
             +  -  -  - ]
    4035                 :            : 
    4036   [ +  -  +  - ]:        140 :   obatched(clog) << "database record counts:" << endl;
    4037                 :       1610 :   while (1)
    4038                 :            :     {
    4039         [ +  - ]:        840 :       if (interrupted) break;
    4040         [ +  - ]:        840 :       if (sigusr1 != forced_rescan_count) // stop early if scan triggered
    4041                 :            :         break;
    4042                 :            : 
    4043         [ +  - ]:        840 :       int rc = ps_query.step();
    4044         [ +  + ]:        840 :       if (rc == SQLITE_DONE) break;
    4045         [ -  + ]:        770 :       if (rc != SQLITE_ROW)
    4046   [ #  #  #  # ]:          0 :         throw sqlite_exception(rc, "step");
    4047                 :            : 
    4048         [ +  - ]:        770 :       obatched(clog)
    4049   [ +  -  -  +  :        770 :         << ((const char*) sqlite3_column_text(ps_query, 0) ?: (const char*) "NULL")
                   +  - ]
    4050                 :            :         << " "
    4051   [ +  -  +  -  :       1540 :         << (sqlite3_column_text(ps_query, 1) ?: (const unsigned char*) "NULL")
             -  +  +  - ]
    4052                 :        770 :         << endl;
    4053                 :            : 
    4054   [ +  -  +  -  :       1540 :       set_metric("groom", "statistic",
          -  +  +  -  +  
          -  +  -  +  -  
          -  +  +  +  -  
                -  -  - ]
    4055         [ +  - ]:        770 :                  ((const char*) sqlite3_column_text(ps_query, 0) ?: (const char*) "NULL"),
    4056                 :            :                  (sqlite3_column_double(ps_query, 1)));
    4057                 :        770 :     }
    4058                 :         70 : }
    4059                 :            : 
    4060                 :            : 
    4061                 :            : // Do a round of database grooming that might take many minutes to run.
    4062                 :         70 : void groom()
    4063                 :            : {
    4064         [ +  - ]:        140 :   obatched(clog) << "grooming database" << endl;
    4065                 :            : 
    4066                 :         70 :   struct timespec ts_start, ts_end;
    4067                 :         70 :   clock_gettime (CLOCK_MONOTONIC, &ts_start);
    4068                 :            : 
    4069                 :            :   // scan for files that have disappeared
    4070                 :         70 :   sqlite_ps files (db, "check old files",
    4071                 :            :                    "select distinct s.mtime, s.file, f.name from "
    4072                 :            :                    BUILDIDS "_file_mtime_scanned s, " BUILDIDS "_files_v f "
    4073   [ +  -  +  -  :        140 :                    "where f.id = s.file");
             +  -  -  - ]
    4074                 :            :   // NB: Because _ftime_mtime_scanned can contain both F and
    4075                 :            :   // R records for the same file, this query would return duplicates if the
    4076                 :            :   // DISTINCT qualifier were not there.
    4077         [ +  - ]:         70 :   files.reset();
    4078                 :            : 
    4079                 :            :   // DECISION TIME - we enumerate stale fileids/mtimes
    4080         [ +  - ]:         70 :   deque<pair<int64_t,int64_t> > stale_fileid_mtime;
    4081                 :            :   
    4082                 :         70 :   time_t time_start = time(NULL);
    4083                 :        302 :   while(1)
    4084                 :            :     {
    4085                 :            :       // PR28514: limit grooming iteration to O(rescan time), to avoid
    4086                 :            :       // slow filesystem tests over many files locking out rescans for
    4087                 :            :       // too long.
    4088   [ +  +  -  + ]:        186 :       if (rescan_s > 0 && (long)time(NULL) > (long)(time_start + rescan_s))
    4089                 :            :         {
    4090   [ #  #  #  #  :          0 :           inc_metric("groomed_total", "decision", "aborted");
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    4091                 :          0 :           break;
    4092                 :            :         }
    4093                 :            : 
    4094         [ +  - ]:        186 :       if (interrupted) break;
    4095                 :            : 
    4096         [ +  - ]:        186 :       int rc = files.step();
    4097         [ +  + ]:        186 :       if (rc != SQLITE_ROW)
    4098                 :            :         break;
    4099                 :            : 
    4100         [ +  - ]:        116 :       int64_t mtime = sqlite3_column_int64 (files, 0);
    4101         [ +  - ]:        116 :       int64_t fileid = sqlite3_column_int64 (files, 1);
    4102   [ +  -  -  + ]:        116 :       const char* filename = ((const char*) sqlite3_column_text (files, 2) ?: "");
    4103                 :        116 :       struct stat s;
    4104                 :        116 :       bool regex_file_drop = 0;
    4105                 :            : 
    4106         [ +  + ]:        116 :       if (regex_groom)
    4107                 :            :         {
    4108         [ +  - ]:         16 :           bool reg_include = !regexec (&file_include_regex, filename, 0, 0, 0);
    4109         [ +  - ]:         16 :           bool reg_exclude = !regexec (&file_exclude_regex, filename, 0, 0, 0);
    4110                 :         16 :           regex_file_drop = !reg_include || reg_exclude; // match logic of scan_source_paths  
    4111                 :            :         }
    4112                 :            : 
    4113                 :        116 :       rc = stat(filename, &s);
    4114   [ +  +  -  + ]:        116 :       if ( regex_file_drop ||  rc < 0 || (mtime != (int64_t) s.st_mtime) )
    4115                 :            :         {
    4116         [ +  - ]:         24 :           if (verbose > 2)
    4117   [ +  -  +  -  :         48 :             obatched(clog) << "groom: stale file=" << filename << " mtime=" << mtime << endl;
          +  -  +  -  +  
                      - ]
    4118         [ +  - ]:         24 :           stale_fileid_mtime.push_back(make_pair(fileid,mtime));
    4119   [ +  -  +  -  :         48 :           inc_metric("groomed_total", "decision", "stale");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    4120   [ +  -  +  -  :         48 :           set_metric("thread_work_pending","role","groom", stale_fileid_mtime.size());
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    4121                 :            :         }
    4122                 :            :       else
    4123   [ +  -  +  -  :        184 :         inc_metric("groomed_total", "decision", "fresh");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    4124                 :            :       
    4125         [ +  - ]:        116 :       if (sigusr1 != forced_rescan_count) // stop early if scan triggered
    4126                 :            :         break;
    4127                 :        116 :     }
    4128         [ +  - ]:         70 :   files.reset();
    4129                 :            : 
    4130                 :            :   // ACTION TIME
    4131                 :            : 
    4132                 :            :   // Now that we know which file/mtime tuples are stale, actually do
    4133                 :            :   // the deletion from the database.  Doing this during the SELECT
    4134                 :            :   // iteration above results in undefined behaviour in sqlite, as per
    4135                 :            :   // https://www.sqlite.org/isolation.html
    4136                 :            : 
    4137                 :            :   // We could shuffle stale_fileid_mtime[] here.  It'd let aborted
    4138                 :            :   // sequences of nuke operations resume at random locations, instead
    4139                 :            :   // of just starting over.  But it doesn't matter much either way,
    4140                 :            :   // as long as we make progress.
    4141                 :            : 
    4142   [ +  -  +  -  :        140 :   sqlite_ps files_del_f_de (db, "nuke f_de", "delete from " BUILDIDS "_f_de where file = ? and mtime = ?");
          +  -  +  -  -  
                      - ]
    4143   [ +  -  +  -  :        140 :   sqlite_ps files_del_r_de (db, "nuke r_de", "delete from " BUILDIDS "_r_de where file = ? and mtime = ?");
          +  -  +  -  -  
                      - ]
    4144         [ +  - ]:         70 :   sqlite_ps files_del_scan (db, "nuke f_m_s", "delete from " BUILDIDS "_file_mtime_scanned "
    4145   [ +  -  +  -  :        140 :                             "where file = ? and mtime = ?");
          +  -  +  -  -  
                      - ]
    4146                 :            : 
    4147         [ +  + ]:         94 :   while (! stale_fileid_mtime.empty())
    4148                 :            :     {
    4149                 :         24 :       auto stale = stale_fileid_mtime.front();
    4150                 :         24 :       stale_fileid_mtime.pop_front();
    4151   [ +  -  +  -  :         48 :       set_metric("thread_work_pending","role","groom", stale_fileid_mtime.size());
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    4152                 :            : 
    4153                 :            :       // PR28514: limit grooming iteration to O(rescan time), to avoid
    4154                 :            :       // slow nuke_* queries over many files locking out rescans for too
    4155                 :            :       // long.  We iterate over the files in random() sequence to avoid
    4156                 :            :       // partial checks going over the same set.
    4157   [ -  +  -  - ]:         24 :       if (rescan_s > 0 && (long)time(NULL) > (long)(time_start + rescan_s))
    4158                 :            :         {
    4159   [ #  #  #  #  :          0 :           inc_metric("groomed_total", "action", "aborted");
          #  #  #  #  #  
          #  #  #  #  #  
                   #  # ]
    4160                 :          0 :           break;
    4161                 :            :         }
    4162                 :            : 
    4163         [ +  - ]:         24 :       if (interrupted) break;
    4164                 :            : 
    4165                 :         24 :       int64_t fileid = stale.first;
    4166                 :         24 :       int64_t mtime = stale.second;
    4167   [ +  -  +  -  :         24 :       files_del_f_de.reset().bind(1,fileid).bind(2,mtime).step_ok_done();
             +  -  +  - ]
    4168   [ +  -  +  -  :         24 :       files_del_r_de.reset().bind(1,fileid).bind(2,mtime).step_ok_done();
             +  -  +  - ]
    4169   [ +  -  +  -  :         24 :       files_del_scan.reset().bind(1,fileid).bind(2,mtime).step_ok_done();
             +  -  +  - ]
    4170   [ +  -  +  -  :         48 :       inc_metric("groomed_total", "action", "cleaned");
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    4171                 :            :       
    4172         [ +  - ]:         24 :        if (sigusr1 != forced_rescan_count) // stop early if scan triggered
    4173                 :            :         break;
    4174                 :            :     }
    4175                 :         70 :   stale_fileid_mtime.clear(); // no need for this any longer
    4176   [ +  -  +  -  :        140 :   set_metric("thread_work_pending","role","groom", stale_fileid_mtime.size());
          +  -  +  -  -  
          +  -  +  -  -  
                   -  - ]
    4177                 :            :       
    4178                 :            :   // delete buildids with no references in _r_de or _f_de tables;
    4179                 :            :   // cascades to _r_sref & _f_s records
    4180         [ +  - ]:         70 :   sqlite_ps buildids_del (db, "nuke orphan buildids",
    4181                 :            :                           "delete from " BUILDIDS "_buildids "
    4182                 :            :                           "where not exists (select 1 from " BUILDIDS "_f_de d where " BUILDIDS "_buildids.id = d.buildid) "
    4183   [ +  -  +  -  :        140 :                           "and not exists (select 1 from " BUILDIDS "_r_de d where " BUILDIDS "_buildids.id = d.buildid)");
          +  -  +  -  -  
                      - ]
    4184   [ +  -  +  - ]:         70 :   buildids_del.reset().step_ok_done();
    4185                 :            : 
    4186         [ -  + ]:         70 :   if (interrupted) return;
    4187                 :            : 
    4188                 :            :   // NB: "vacuum" is too heavy for even daily runs: it rewrites the entire db, so is done as maxigroom -G
    4189   [ +  -  +  -  :        140 :   sqlite_ps g1 (db, "incremental vacuum", "pragma incremental_vacuum");
          +  -  +  -  -  
                      - ]
    4190   [ +  -  +  - ]:         70 :   g1.reset().step_ok_done();
    4191   [ +  -  +  -  :        140 :   sqlite_ps g2 (db, "optimize", "pragma optimize");
          +  -  -  +  -  
                      - ]
    4192   [ +  -  +  - ]:         70 :   g2.reset().step_ok_done();
    4193   [ +  -  +  -  :        140 :   sqlite_ps g3 (db, "wal checkpoint", "pragma wal_checkpoint=truncate");
          +  -  +  -  -  
                      - ]
    4194   [ +  -  +  - ]:         70 :   g3.reset().step_ok_done();
    4195                 :            : 
    4196         [ +  - ]:         70 :   database_stats_report();
    4197                 :            : 
    4198   [ +  -  +  - ]:         70 :   (void) statfs_free_enough_p(db_path, "database"); // report sqlite filesystem size
    4199                 :            : 
    4200         [ +  - ]:         70 :   sqlite3_db_release_memory(db); // shrink the process if possible
    4201         [ +  - ]:         70 :   sqlite3_db_release_memory(dbq); // ... for both connections
    4202         [ +  - ]:         70 :   debuginfod_pool_groom(); // and release any debuginfod_client objects we've been holding onto
    4203                 :            : 
    4204         [ +  - ]:         70 :   fdcache.limit(0,0,0,0); // release the fdcache contents
    4205         [ +  - ]:         70 :   fdcache.limit(fdcache_fds, fdcache_mbs, fdcache_prefetch_fds, fdcache_prefetch_mbs); // restore status quo parameters
    4206                 :            : 
    4207                 :         70 :   clock_gettime (CLOCK_MONOTONIC, &ts_end);
    4208                 :         70 :   double deltas = (ts_end.tv_sec - ts_start.tv_sec) + (ts_end.tv_nsec - ts_start.tv_nsec)/1.e9;
    4209                 :            : 
    4210   [ +  -  +  -  :        140 :   obatched(clog) << "groomed database in " << deltas << "s" << endl;
             +  -  +  - ]
    4211                 :         70 : }
    4212                 :            : 
    4213                 :            : 
    4214                 :            : static void*
    4215                 :         70 : thread_main_groom (void* /*arg*/)
    4216                 :            : {
    4217   [ +  -  +  -  :        140 :   set_metric("thread_tid", "role", "groom", tid());
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    4218   [ +  -  +  -  :        140 :   add_metric("thread_count", "role", "groom", 1);
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    4219                 :            : 
    4220                 :         70 :   time_t last_groom = 0;
    4221                 :            : 
    4222                 :        542 :   while (1)
    4223                 :            :     {
    4224                 :        306 :       sleep (1);
    4225                 :        306 :       scanq.wait_idle(); // PR25394: block scanners during grooming!
    4226         [ +  + ]:        306 :       if (interrupted) break;
    4227                 :            : 
    4228                 :        236 :       time_t now = time(NULL);
    4229                 :        236 :       bool groom_now = false;
    4230         [ +  + ]:        236 :       if (last_groom == 0) // at least one initial groom is documented even for -g0
    4231                 :         64 :         groom_now = true;
    4232   [ +  +  +  + ]:        236 :       if (groom_s > 0 && (long)now > (long)(last_groom + groom_s))
    4233                 :        236 :         groom_now = true;
    4234         [ +  + ]:        236 :       if (sigusr2 != forced_groom_count)
    4235                 :            :         {
    4236                 :          6 :           forced_groom_count = sigusr2;
    4237                 :          6 :           groom_now = true;
    4238                 :            :         }
    4239         [ +  + ]:        236 :       if (groom_now)
    4240                 :            :         {
    4241   [ +  -  +  -  :        140 :           set_metric("thread_busy", "role", "groom", 1);
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    4242                 :         70 :           try
    4243                 :            :             {
    4244         [ +  - ]:         70 :               groom ();
    4245                 :            :             }
    4246         [ -  - ]:          0 :           catch (const sqlite_exception& e)
    4247                 :            :             {
    4248   [ -  -  -  -  :          0 :               obatched(cerr) << e.message << endl;
                   -  - ]
    4249                 :          0 :             }
    4250                 :         70 :           last_groom = time(NULL); // NB: now was before grooming
    4251                 :            :           // finished a grooming loop
    4252   [ +  -  +  -  :        140 :           inc_metric("thread_work_total", "role", "groom");
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    4253   [ +  -  +  -  :        140 :           set_metric("thread_busy", "role", "groom", 0);
          +  -  -  +  -  
             +  -  -  -  
                      - ]
    4254                 :            :         }
    4255                 :            : 
    4256                 :        236 :       scanq.done_idle();
    4257                 :        236 :     }
    4258                 :            : 
    4259                 :         70 :   return 0;
    4260                 :            : }
    4261                 :            : 
    4262                 :            : 
    4263                 :            : ////////////////////////////////////////////////////////////////////////
    4264                 :            : 
    4265                 :            : 
    4266                 :            : static void
    4267                 :         72 : signal_handler (int /* sig */)
    4268                 :            : {
    4269                 :         72 :   interrupted ++;
    4270                 :            : 
    4271         [ +  + ]:         72 :   if (db)
    4272                 :         70 :     sqlite3_interrupt (db);
    4273         [ +  - ]:         72 :   if (dbq)
    4274                 :         72 :     sqlite3_interrupt (dbq);
    4275                 :            : 
    4276                 :            :   // NB: don't do anything else in here
    4277                 :         72 : }
    4278                 :            : 
    4279                 :            : static void
    4280                 :         62 : sigusr1_handler (int /* sig */)
    4281                 :            : {
    4282                 :         62 :    sigusr1 ++;
    4283                 :            :   // NB: don't do anything else in here
    4284                 :         62 : }
    4285                 :            : 
    4286                 :            : static void
    4287                 :          6 : sigusr2_handler (int /* sig */)
    4288                 :            : {
    4289                 :          6 :    sigusr2 ++;
    4290                 :            :   // NB: don't do anything else in here
    4291                 :          6 : }
    4292                 :            : 
    4293                 :            : 
    4294                 :            : static void // error logging callback from libmicrohttpd internals
    4295                 :          0 : error_cb (void *arg, const char *fmt, va_list ap)
    4296                 :            : {
    4297                 :          0 :   (void) arg;
    4298   [ #  #  #  #  :          0 :   inc_metric("error_count","libmicrohttpd",fmt);
          #  #  #  #  #  
             #  #  #  #  
                      # ]
    4299                 :          0 :   char errmsg[512];
    4300                 :          0 :   (void) vsnprintf (errmsg, sizeof(errmsg), fmt, ap); // ok if slightly truncated
    4301         [ #  # ]:          0 :   obatched(cerr) << "libmicrohttpd error: " << errmsg; // MHD_DLOG calls already include \n
    4302                 :          0 : }
    4303                 :            : 
    4304                 :            : 
    4305                 :            : // A user-defined sqlite function, to score the sharedness of the
    4306                 :            : // prefix of two strings.  This is used to compare candidate debuginfo
    4307                 :            : // / source-rpm names, so that the closest match
    4308                 :            : // (directory-topology-wise closest) is found.  This is important in
    4309                 :            : // case the same sref (source file name) is in many -debuginfo or
    4310                 :            : // -debugsource RPMs, such as when multiple versions/releases of the
    4311                 :            : // same package are in the database.
    4312                 :            : 
    4313                 :        296 : static void sqlite3_sharedprefix_fn (sqlite3_context* c, int argc, sqlite3_value** argv)
    4314                 :            : {
    4315         [ -  + ]:        296 :   if (argc != 2)
    4316                 :          0 :     sqlite3_result_error(c, "expect 2 string arguments", -1);
    4317   [ +  -  +  + ]:        592 :   else if ((sqlite3_value_type(argv[0]) != SQLITE_TEXT) ||
    4318                 :        296 :            (sqlite3_value_type(argv[1]) != SQLITE_TEXT))
    4319                 :          6 :     sqlite3_result_null(c);
    4320                 :            :   else
    4321                 :            :     {
    4322                 :        290 :       const unsigned char* a = sqlite3_value_text (argv[0]);
    4323                 :        290 :       const unsigned char* b = sqlite3_value_text (argv[1]);
    4324                 :        290 :       int i = 0;
    4325   [ +  +  +  -  :      35878 :       while (*a != '\0' && *b != '\0' && *a++ == *b++)
             +  +  +  + ]
    4326                 :      35048 :         i++;
    4327                 :        290 :       sqlite3_result_int (c, i);
    4328                 :            :     }
    4329                 :        296 : }
    4330                 :            : 
    4331                 :            : 
    4332                 :            : static unsigned
    4333                 :        140 : default_concurrency() // guaranteed >= 1
    4334                 :            : {
    4335                 :            :   // Prior to PR29975 & PR29976, we'd just use this: 
    4336                 :        140 :   unsigned sth = std::thread::hardware_concurrency();
    4337                 :            :   // ... but on many-CPU boxes, admins or distros may throttle
    4338                 :            :   // resources in such a way that debuginfod would mysteriously fail.
    4339                 :            :   // So we reduce the defaults:
    4340                 :            : 
    4341                 :        140 :   unsigned aff = 0;
    4342                 :            : #ifdef HAVE_SCHED_GETAFFINITY
    4343                 :        140 :   {
    4344                 :        140 :     int ret;
    4345                 :        140 :     cpu_set_t mask;
    4346                 :        140 :     CPU_ZERO(&mask);
    4347                 :        140 :     ret = sched_getaffinity(0, sizeof(mask), &mask);
    4348         [ +  - ]:        140 :     if (ret == 0)
    4349                 :        140 :       aff = CPU_COUNT(&mask);
    4350                 :            :   }
    4351                 :            : #endif
    4352                 :            :   
    4353                 :        140 :   unsigned fn = 0;
    4354                 :            : #ifdef HAVE_GETRLIMIT
    4355                 :        140 :   {
    4356                 :        140 :     struct rlimit rlim;
    4357                 :        140 :     int rc = getrlimit(RLIMIT_NOFILE, &rlim);
    4358         [ +  - ]:        140 :     if (rc == 0)
    4359         [ +  - ]:        280 :       fn = max((rlim_t)1, (rlim.rlim_cur - 100) / 4);
    4360                 :            :     // at least 2 fds are used by each listener thread etc.
    4361                 :            :     // plus a bunch to account for shared libraries and such
    4362                 :            :   }
    4363                 :            : #endif
    4364                 :            : 
    4365   [ -  +  -  +  :        140 :   unsigned d = min(max(sth, 1U),
                   -  + ]
    4366         [ -  + ]:        140 :                    min(max(aff, 1U),
    4367         [ -  + ]:        140 :                        max(fn, 1U)));
    4368                 :        140 :   return d;
    4369                 :            : }
    4370                 :            : 
    4371                 :            : 
    4372                 :            : // 30879: Something to help out in case of an uncaught exception.
    4373                 :          0 : void my_terminate_handler()
    4374                 :            : {
    4375                 :            : #if defined(__GLIBC__)
    4376                 :          0 :   void *array[40];
    4377                 :          0 :   int size = backtrace (array, 40);
    4378                 :          0 :   backtrace_symbols_fd (array, size, STDERR_FILENO);
    4379                 :            : #endif
    4380                 :            : #if defined(__GLIBCXX__) || defined(__GLIBCPP__)
    4381                 :          0 :   __gnu_cxx::__verbose_terminate_handler();
    4382                 :            : #endif
    4383                 :          0 :   abort();
    4384                 :            : }
    4385                 :            : 
    4386                 :            : 
    4387                 :            : int
    4388                 :         72 : main (int argc, char *argv[])
    4389                 :            : {
    4390                 :         72 :   (void) setlocale (LC_ALL, "");
    4391                 :         72 :   (void) bindtextdomain (PACKAGE_TARNAME, LOCALEDIR);
    4392                 :         72 :   (void) textdomain (PACKAGE_TARNAME);
    4393                 :            : 
    4394                 :         72 :   std::set_terminate(& my_terminate_handler);
    4395                 :            : 
    4396                 :            :   /* Tell the library which version we are expecting.  */
    4397                 :         72 :   elf_version (EV_CURRENT);
    4398                 :            : 
    4399   [ +  -  -  + ]:        144 :   tmpdir = string(getenv("TMPDIR") ?: "/tmp");
    4400                 :            : 
    4401                 :            :   /* Set computed default values. */
    4402   [ -  +  +  -  :         72 :   db_path = string(getenv("HOME") ?: "/") + string("/.debuginfod.sqlite"); /* XDG? */
          +  -  -  +  -  
             +  +  -  -  
                      - ]
    4403                 :         72 :   int rc = regcomp (& file_include_regex, ".*", REG_EXTENDED|REG_NOSUB); // match everything
    4404         [ -  + ]:         72 :   if (rc != 0)
    4405                 :          0 :     error (EXIT_FAILURE, 0, "regcomp failure: %d", rc);
    4406                 :         72 :   rc = regcomp (& file_exclude_regex, "^$", REG_EXTENDED|REG_NOSUB); // match nothing
    4407         [ -  + ]:         72 :   if (rc != 0)
    4408                 :          0 :     error (EXIT_FAILURE, 0, "regcomp failure: %d", rc);
    4409                 :            : 
    4410                 :            :   // default parameters for fdcache are computed from system stats
    4411                 :         72 :   struct statfs sfs;
    4412                 :         72 :   rc = statfs(tmpdir.c_str(), &sfs);
    4413         [ -  + ]:         72 :   if (rc < 0)
    4414                 :          0 :     fdcache_mbs = 1024; // 1 gigabyte
    4415                 :            :   else
    4416                 :         72 :     fdcache_mbs = sfs.f_bavail * sfs.f_bsize / 1024 / 1024 / 4; // 25% of free space
    4417                 :         72 :   fdcache_mintmp = 25; // emergency flush at 25% remaining (75% full)
    4418                 :         72 :   fdcache_prefetch = 64; // guesstimate storage is this much less costly than re-decompression
    4419                 :         72 :   fdcache_fds = (concurrency + fdcache_prefetch) * 2;
    4420                 :            : 
    4421                 :            :   /* Parse and process arguments.  */
    4422                 :         72 :   int remaining;
    4423                 :         72 :   (void) argp_parse (&argp, argc, argv, ARGP_IN_ORDER, &remaining, NULL);
    4424         [ -  + ]:         72 :   if (remaining != argc)
    4425                 :          0 :       error (EXIT_FAILURE, 0,
    4426                 :          0 :              "unexpected argument: %s", argv[remaining]);
    4427                 :            : 
    4428                 :            :   // Make the prefetch cache spaces a fraction of the main fdcache if
    4429                 :            :   // unspecified.
    4430         [ +  + ]:         72 :   if (fdcache_prefetch_fds == 0)
    4431                 :         70 :     fdcache_prefetch_fds = fdcache_fds / 2;
    4432         [ +  + ]:         72 :   if (fdcache_prefetch_mbs == 0)
    4433                 :         70 :     fdcache_prefetch_mbs = fdcache_mbs / 2;
    4434                 :            : 
    4435   [ +  +  +  +  :         72 :   if (scan_archives.size()==0 && !scan_files && source_paths.size()>0)
                   -  + ]
    4436         [ #  # ]:          0 :     obatched(clog) << "warning: without -F -R -U -Z, ignoring PATHs" << endl;
    4437                 :            : 
    4438                 :         72 :   fdcache.limit(fdcache_fds, fdcache_mbs, fdcache_prefetch_fds, fdcache_prefetch_mbs);
    4439                 :            : 
    4440                 :         72 :   (void) signal (SIGPIPE, SIG_IGN); // microhttpd can generate it incidentally, ignore
    4441                 :         72 :   (void) signal (SIGINT, signal_handler); // ^C
    4442                 :         72 :   (void) signal (SIGHUP, signal_handler); // EOF
    4443                 :         72 :   (void) signal (SIGTERM, signal_handler); // systemd
    4444                 :         72 :   (void) signal (SIGUSR1, sigusr1_handler); // end-user
    4445                 :         72 :   (void) signal (SIGUSR2, sigusr2_handler); // end-user
    4446                 :            : 
    4447                 :            :   /* Get database ready. */
    4448         [ +  + ]:         72 :   if (! passive_p)
    4449                 :            :     {
    4450                 :         70 :       rc = sqlite3_open_v2 (db_path.c_str(), &db, (SQLITE_OPEN_READWRITE
    4451                 :            :                                                    |SQLITE_OPEN_URI
    4452                 :            :                                                    |SQLITE_OPEN_PRIVATECACHE
    4453                 :            :                                                    |SQLITE_OPEN_CREATE
    4454                 :            :                                                    |SQLITE_OPEN_FULLMUTEX), /* thread-safe */
    4455                 :            :                             NULL);
    4456         [ -  + ]:         70 :       if (rc == SQLITE_CORRUPT)
    4457                 :            :         {
    4458                 :          0 :           (void) unlink (db_path.c_str());
    4459                 :          0 :           error (EXIT_FAILURE, 0,
    4460                 :            :                  "cannot open %s, deleted database: %s", db_path.c_str(), sqlite3_errmsg(db));
    4461                 :            :         }
    4462         [ -  + ]:         70 :       else if (rc)
    4463                 :            :         {
    4464                 :          0 :           error (EXIT_FAILURE, 0,
    4465                 :            :                  "cannot open %s, consider deleting database: %s", db_path.c_str(), sqlite3_errmsg(db));
    4466                 :            :         }
    4467                 :            :     }
    4468                 :            : 
    4469                 :            :   // open the readonly query variant
    4470                 :            :   // NB: PRIVATECACHE allows web queries to operate in parallel with
    4471                 :            :   // much other grooming/scanning operation.
    4472                 :         72 :   rc = sqlite3_open_v2 (db_path.c_str(), &dbq, (SQLITE_OPEN_READONLY
    4473                 :            :                                                 |SQLITE_OPEN_URI
    4474                 :            :                                                 |SQLITE_OPEN_PRIVATECACHE
    4475                 :            :                                                 |SQLITE_OPEN_FULLMUTEX), /* thread-safe */
    4476                 :            :                         NULL);
    4477         [ -  + ]:         72 :   if (rc)
    4478                 :            :     {
    4479                 :          0 :       error (EXIT_FAILURE, 0,
    4480                 :            :              "cannot open %s, consider deleting database: %s", db_path.c_str(), sqlite3_errmsg(dbq));
    4481                 :            :     }
    4482                 :            : 
    4483                 :            : 
    4484         [ +  - ]:        144 :   obatched(clog) << "opened database " << db_path
    4485   [ +  +  +  -  :         74 :                  << (db?" rw":"") << (dbq?" ro":"") << endl;
          -  +  +  -  +  
                      - ]
    4486   [ +  -  +  - ]:        144 :   obatched(clog) << "sqlite version " << sqlite3_version << endl;
    4487   [ +  +  +  -  :        214 :   obatched(clog) << "service mode " << (passive_p ? "passive":"active") << endl;
                   +  - ]
    4488                 :            : 
    4489                 :            :   // add special string-prefix-similarity function used in rpm sref/sdef resolution
    4490                 :         72 :   rc = sqlite3_create_function(dbq, "sharedprefix", 2, SQLITE_UTF8, NULL,
    4491                 :            :                                & sqlite3_sharedprefix_fn, NULL, NULL);
    4492         [ -  + ]:         72 :   if (rc != SQLITE_OK)
    4493                 :          0 :     error (EXIT_FAILURE, 0,
    4494                 :            :            "cannot create sharedprefix function: %s", sqlite3_errmsg(dbq));
    4495                 :            : 
    4496         [ +  + ]:         72 :   if (! passive_p)
    4497                 :            :     {
    4498         [ +  + ]:         70 :       if (verbose > 3)
    4499   [ +  -  +  - ]:         88 :         obatched(clog) << "ddl: " << DEBUGINFOD_SQLITE_DDL << endl;
    4500                 :         70 :       rc = sqlite3_exec (db, DEBUGINFOD_SQLITE_DDL, NULL, NULL, NULL);
    4501         [ -  + ]:         70 :       if (rc != SQLITE_OK)
    4502                 :            :         {
    4503                 :          0 :           error (EXIT_FAILURE, 0,
    4504                 :            :                  "cannot run database schema ddl: %s", sqlite3_errmsg(db));
    4505                 :            :         }
    4506                 :            :     }
    4507                 :            : 
    4508   [ +  -  +  -  :        144 :   obatched(clog) << "libmicrohttpd version " << MHD_get_version() << endl;
                   +  - ]
    4509                 :            :   
    4510                 :            :   /* If '-C' wasn't given or was given with no arg, pick a reasonable default
    4511                 :            :      for the number of worker threads.  */
    4512         [ +  + ]:         72 :   if (connection_pool == 0)
    4513                 :         68 :     connection_pool = default_concurrency();
    4514                 :            : 
    4515                 :            :   /* Note that MHD_USE_EPOLL and MHD_USE_THREAD_PER_CONNECTION don't
    4516                 :            :      work together.  */
    4517                 :         72 :   unsigned int use_epoll = 0;
    4518                 :            : #if MHD_VERSION >= 0x00095100
    4519                 :         72 :   use_epoll = MHD_USE_EPOLL;
    4520                 :            : #endif
    4521                 :            : 
    4522                 :         72 :   unsigned int mhd_flags = (
    4523                 :            : #if MHD_VERSION >= 0x00095300
    4524                 :            :                             MHD_USE_INTERNAL_POLLING_THREAD
    4525                 :            : #else
    4526                 :            :                             MHD_USE_SELECT_INTERNALLY
    4527                 :            : #endif
    4528                 :            :                             | MHD_USE_DUAL_STACK
    4529                 :            :                             | use_epoll
    4530                 :            : #if MHD_VERSION >= 0x00095200
    4531                 :            :                             | MHD_USE_ITC
    4532                 :            : #endif
    4533                 :            :                             | MHD_USE_DEBUG); /* report errors to stderr */
    4534                 :            : 
    4535                 :            :   // Start httpd server threads.  Use a single dual-homed pool.
    4536                 :         72 :   MHD_Daemon *d46 = MHD_start_daemon (mhd_flags, http_port,
    4537                 :            :                                       NULL, NULL, /* default accept policy */
    4538                 :            :                                       handler_cb, NULL, /* handler callback */
    4539                 :            :                                       MHD_OPTION_EXTERNAL_LOGGER,
    4540                 :            :                                       error_cb, NULL,
    4541                 :            :                                       MHD_OPTION_THREAD_POOL_SIZE,
    4542                 :            :                                       (int)connection_pool,
    4543                 :            :                                       MHD_OPTION_END);
    4544                 :            : 
    4545                 :         72 :   MHD_Daemon *d4 = NULL;
    4546         [ -  + ]:         72 :   if (d46 == NULL)
    4547                 :            :     {
    4548                 :            :       // Cannot use dual_stack, use ipv4 only
    4549                 :          0 :       mhd_flags &= ~(MHD_USE_DUAL_STACK);
    4550         [ #  # ]:          0 :       d4 = MHD_start_daemon (mhd_flags, http_port,
    4551                 :            :                              NULL, NULL, /* default accept policy */
    4552                 :            :                              handler_cb, NULL, /* handler callback */
    4553                 :            :                              MHD_OPTION_EXTERNAL_LOGGER,
    4554                 :            :                              error_cb, NULL,
    4555                 :            :                              (connection_pool
    4556                 :            :                               ? MHD_OPTION_THREAD_POOL_SIZE
    4557                 :            :                               : MHD_OPTION_END),
    4558                 :            :                              (connection_pool
    4559                 :            :                               ? (int)connection_pool
    4560                 :            :                               : MHD_OPTION_END),
    4561                 :            :                              MHD_OPTION_END);
    4562         [ #  # ]:          0 :       if (d4 == NULL)
    4563                 :            :         {
    4564                 :          0 :           sqlite3 *database = db;
    4565                 :          0 :           sqlite3 *databaseq = dbq;
    4566                 :          0 :           db = dbq = 0; // for signal_handler not to freak
    4567                 :          0 :           sqlite3_close (databaseq);
    4568                 :          0 :           sqlite3_close (database);
    4569                 :          0 :           error (EXIT_FAILURE, 0, "cannot start http server at port %d",
    4570                 :            :                  http_port);
    4571                 :            :         }
    4572                 :            : 
    4573                 :            :     }
    4574                 :         72 :   obatched(clog) << "started http server on"
    4575                 :            :                  << (d4 != NULL ? " IPv4 " : " IPv4 IPv6 ")
    4576   [ +  -  +  -  :        144 :                  << "port=" << http_port << endl;
          +  -  +  -  +  
                      - ]
    4577                 :            : 
    4578                 :            :   // add maxigroom sql if -G given
    4579         [ -  + ]:         72 :   if (maxigroom)
    4580                 :            :     {
    4581         [ #  # ]:          0 :       obatched(clog) << "maxigrooming database, please wait." << endl;
    4582         [ #  # ]:          0 :       extra_ddl.push_back("create index if not exists " BUILDIDS "_r_sref_arc on " BUILDIDS "_r_sref(artifactsrc);");
    4583         [ #  # ]:          0 :       extra_ddl.push_back("delete from " BUILDID