Release 3.21.0 (?? Apr 2023)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, ARM64/Android, MIPS32/Android, X86/Android,
X86/Solaris, AMD64/Solaris, AMD64/MacOSX 10.12, X86/FreeBSD and
AMD64/FreeBSD. There is also preliminary support for X86/macOS 10.13,
AMD64/macOS 10.13 and nanoMIPS/Linux.
* ==================== CORE CHANGES ===================
* When GDB is used to debug a program running under valgrind using
the valgrind gdbserver, GDB will automatically load some
python code provided in valgrind defining GDB front end commands
corresponding to the valgrind monitor commands.
These GDB front end commands accept the same format as
the monitor commands directly sent to the Valgrind gdbserver.
These GDB front end commands provide a better integration
in the GDB command line interface, so as to use for example
GDB auto-completion, command specific help, searching for
a command or command help matching a regexp, ...
For relevant monitor commands, GDB will evaluate arguments
to make the use of monitor commands easier.
For example, instead of having to print the address of a variable
to pass it to a subsequent monitor command, the GDB front end
command will evaluate the address argument. It is for example
possible to do:
(gdb) memcheck who_point_at &some_struct sizeof(some_struct)
instead of:
(gdb) p &some_struct
$2 = (some_struct_type *) 0x1130a0 <some_struct>
(gdb) p sizeof(some_struct)
$3 = 40
(gdb) monitor who_point_at 0x1130a0 40
* The vgdb utility now supports extended-remote protocol when
invoked with --multi. In this mode the GDB run command is
supported. Which means you don't need to run gdb and valgrind
from different terminals. So for example to start you program
in gdb and run it under valgrind you can do:
$ gdb prog
(gdb) set remote exec-file prog
(gdb) set sysroot /
(gdb) target extended-remote | vgdb --multi
(gdb) start
* The behaviour of realloc with a size of zero can now
be changed for tools that intercept malloc. Those
tools are memcheck, helgrind, drd, massif and dhat.
Realloc implementations generally do one of two things
- free the memory like free() and return NULL
(GNU libc and ptmalloc).
- either free the memory and then allocate a
minumum siized block or just return the
original pointer. Return NULL if the
allocation of the minimum sized block fails
(jemalloc, musl, snmalloc, Solaris, macOS).
When Valgrind is configured and built it will
try to match the OS and libc behaviour. However
if you are using a non-default library to replace
malloc and family (e.g., musl on a glibc Linux or
tcmalloc on FreeBSD) then you can use a command line
option to change the behaviour of Valgrind:
--realloc-zero-bytes-frees=yes|no [yes on Linux glibc, no otherwise]
* ================== PLATFORM CHANGES =================
* Make the address space limit on FreeBSD amd64 128Gbytes
(the same as Linux and Solaris, it was 32Gbytes)
* ==================== TOOL CHANGES ===================
* Memcheck:
- When doing a delta leak_search, it is now possible to only
output the new loss records compared to the previous leak search.
This is available in the memcheck monitor command 'leak_search'
by specifying the "new" keyword or in your program by using
the client request VALGRIND_DO_NEW_LEAK_CHECK.
Whenever a "delta" leak search is done (i.e. when specifying
"new" or "increased" or "changed" in the monitor command),
the new loss records have a "new" marker.
- Valgrind now contains python code that defines GDB memcheck
front end monitor commands. See CORE CHANGES.
- Performs checks for the use of realloc with a size of zero.
This is non-portable and a source of errors. If memcheck
detects such a usage it will generate an error
realloc() with size 0
followed by the usual callstacks.
A switch has been added to allow this to be turned off:
--show-realloc-size-zero=yes|no [yes]
* Helgrind:
- The option ---history-backtrace-size=<number> allows to configure
the number of entries to record in the stack traces of "old"
accesses. Previously, this number was hardcoded to 8.
- Valgrind now contains python code that defines GDB helgrind
front end monitor commands. See CORE CHANGES.
* Cachegrind:
- `cg_annotate` has been rewritten from Perl into Python. The new
version is twice as fast, has more flexible argument parsing, and
will make future improvements easier.
* Callgrind:
- Valgrind now contains python code that defines GDB callgrind
front end monitor commands. See CORE CHANGES.
* Massif:
- Valgrind now contains python code that defines GDB massif
front end monitor commands. See CORE CHANGES.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
170510 Don't warn about ioctl of size 0 without direction hint
241072 List tools in --help output
327548 false positive while destroying mutex
382034 Testcases build fixes for musl
351857 confusing error message about valid command line option
392331 Spurious lock not held error from inside pthread_cond_timedwait
400793 pthread_rwlock_timedwrlock false positive
433873 openat2 syscall unimplemented on Linux
434057 Add stdio mode to valgrind's gdbserver
435441 valgrind fails to interpose malloc on musl 1.2.2 due to weak symbol name and no libc soname
444110 priv/guest_ppc_toIR.c:36198:31: warning: duplicated 'if' condition.
444488 Use glibc.pthread.stack_cache_size tunable
444568 drd/tests/pth_barrier_thr_cr fails on Fedora 38
445743 "The impossible happened: mutex is locked simultaneously by two threads"
while using mutexes with priority inheritance and signals
449309 Missing loopback device ioctl(s)
459476 vgdb: allow address reuse to avoid "address already in use" errorsuse" errors
460356 s390: Sqrt32Fx4 -- cannot reduce tree
462830 WARNING: unhandled amd64-freebsd syscall: 474
463027 broken check for MPX instruction support in assembler
464476 Firefox fails to start under Valgrind
464609 Valgrind memcheck should support Linux pidfd_open
464680 Show issues caused by memory policies like selinux deny_execmem
464859 Build failures with GCC-13 (drd tsan_unittest)
464969 D language demangling
465435 m_libcfile.c:66 (vgPlain_safe_fd): Assertion 'newfd >= VG_(fd_hard_limit)' failed.
466104 aligned_alloc problems, part 1
467036 Add time cost statistics for Regtest
467482 Build failure on aarch64 Alpine
467714 fdleak_* and rlimit tests fail when parent process has more than
64 descriptors opened
467839 Gdbserver: Improve compatibility of library directory name
n-i-bz FreeBSD rfork syscall fail with EINVAL or ENOSYS rather than VG_(unimplemented)
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed above.
(3.21.0.RC1: ?? Apr 2023)
Release 3.20.0 (24 Oct 2022)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, ARM64/Android, MIPS32/Android, X86/Android,
X86/Solaris, AMD64/Solaris, AMD64/MacOSX 10.12, X86/FreeBSD and
AMD64/FreeBSD. There is also preliminary support for X86/macOS 10.13,
AMD64/macOS 10.13 and nanoMIPS/Linux.
* ==================== CORE CHANGES ===================
* The option "--vgdb-stop-at=event1,event2,..." accepts the new value abexit.
This indicates to invoke gdbserver when your program exits abnormally
(i.e. with a non zero exit code).
* Fix Rust v0 name demangling.
* The Linux rseq syscall is now implemented as (silently) returning ENOSYS.
* Add FreeBSD syscall wrappers for __specialfd and __realpathat.
* Remove FreeBSD dependencies on COMPAT10, which fixes compatibility with
HardenedBSD
* The option --enable-debuginfod=<no|yes> [default: yes] has been added on
Linux.
* More DWARF5 support as generated by clang14.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
131186 writev reports error in (vector[...])
434764 iconv_open causes ld.so v2.28+ to use optimised strncmp
446754 Improve error codes from alloc functions under memcheck
452274 memcheck crashes with Assertion 'sci->status.what == SsIdle' failed
452779 Valgrind fails to build on FreeBSD 13.0 with llvm-devel (15.0.0)
453055 shared_timed_mutex drd test fails with "Lock shared failed" message
453602 Missing command line option to enable/disable debuginfod
452802 Handle lld 9+ split RW PT_LOAD segments correctly
454040 s390x: False-positive memcheck:cond in memmem on arch13 systems
456171 [PATCH] FreeBSD: Don't record address errors when accessing the 'kern.ps_strings' sysctl struct
n-i-bz Implement vgdb invoker on FreeBSD
458845 PowerPC: The L field for the dcbf and sync instruction should be
3 bits in ISA 3.1.
458915 Remove register cache to fix 458915 gdbserver causes wrong syscall return
459031 Documentation on --error-exitcode incomplete
459477 XERROR messages lacks ending '\n' in vgdb
462007 Implicit int in none/tests/faultstatus.c
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed above.
(3.20.0.RC1: 20 Oct 2022)
Release 3.19.0 (11 Apr 2022)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, ARM64/Android, MIPS32/Android, X86/Android,
X86/Solaris, AMD64/Solaris, AMD64/MacOSX 10.12, X86/FreeBSD and
AMD64/FreeBSD. There is also preliminary support for X86/macOS 10.13,
AMD64/macOS 10.13 and nanoMIPS/Linux.
* ==================== CORE CHANGES ===================
* Fix Rust v0 name demangling.
* The Linux rseq syscall is now implemented as (silently) returning ENOSYS.
* Add FreeBSD syscall wrappers for __specialfd and __realpathat.
* Remove FreeBSD dependencies on COMPAT10, which fixes compatibility with HardenedBSD
* ================== PLATFORM CHANGES =================
* arm64:
- ignore the "v8.x" architecture levels, only look at actual CPU features
present. Fixes mismatch detected between RDMA and atomics features
preventing startup on some QEMU configurations.
- Implement LD{,A}XP and ST{,L}XP
- Fix incorrect code emitted for doubleword CAS.
* s390:
- Fix sys_ipc semtimedop syscall
- Fix VFLRX and WFLRX instructions
- Fix EXRL instruction with negative offset
* ppc64:
- Reimplement the vbpermq instruction support to generate less Iops and
avoid overflowing internal buffers.
- Fix checking for scv support to avoid "Facility 'SCV' unavailable (12),
exception" messages in dmsg.
- Fix setting condition code for Vector Compare quad word instructions.
- Fix fix lxsibzx, lxsihzx and lxsihzx instructions so they only load
their respective sized data.
- Fix the prefixed stq instruction in PC relative mode.
* ==================== TOOL CHANGES ===================
* Memcheck:
- Speed up --track-origins=yes for large (in the range of hundreds to
thousands of megabytes) mmap/munmaps.
* DRD/Helgrind:
- Several fixes for new versions of libstd++ using new posix try_lock
functions
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
403802 leak_cpp_interior fails with some reachable blocks different than expected
435732 memcheck/tests/leak_cpp_interior fails with gcc11
444242 s390x: Valgrind crashes on EXRL with negative offset
444399 arm64: unhandled instruction 0xC87F2D89 (LD{,A}XP and ST{,L}XP).
== 434283
444481 gdb_server test failures on s390x
444495 dhat/tests/copy fails on s390x
444552 memcheck/tests/sem fails on s390x with glibc 2.34
444571 PPC, fix the lxsibzx and lxsihzx so they only load their respective
sized data.
444836 PPC, pstq instruction for R=1 is not storing to the correct address.
444925 fexecve syscall wrapper not properly implemented
445032 valgrind/memcheck crash with SIGSEGV when SIGVTALRM timer used and
libthr.so associated
445211 Fix out of tree builds
445300 [PATCH] Fix building tests with Musl
445011 SIGCHLD is sent when valgrind uses debuginfod-find
445354 arm64 backend: incorrect code emitted for doubleword CAS
445415 arm64 front end: alignment checks missing for atomic instructions
445504 Using C++ condition_variable results in bogus "mutex is locked simultaneously by two threads" warning
445607 Unhandled amd64-freebsd syscall: 247
445668 Inline stack frame generation is broken for Rust binaries
445916 Demangle Rust v0 symbols with .llvm suffix
446139 DRD/Helgrind with std::shared_timed_mutex::try_lock_until and try_lock_shared_until false positives
446138 DRD/Helgrind with std::timed_mutex::try_lock_until false positives
446281 Add a DRD suppression for fwrite
446103 Memcheck: `--track-origins=yes` causes extreme slowdowns for large mmap/munmap
446139 DRD/Helgrind with std::shared_timed_mutex::try_lock_until and try_lock_shared_until false
446251 TARGET_SIGNAL_THR added to enum target_signal
446823 FreeBSD - missing syscalls when using libzm4
447991 s390x: Valgrind indicates illegal instruction on wflrx
447995 Valgrind segfault on power10 due to hwcap checking code
449483 Powerpc: vcmpgtsq., vcmpgtuq,, vcmpequq. instructions not setting the
condition code correctly.
449672 ppc64 --track-origins=yes failures because of bad cmov addHRegUse
449838 sigsegv liburing the 'impossible' happened for io_uring_setup
450025 Powerc: ACC file not implemented as a logical overlay of the VSR
registers.
450437 Warn for execve syscall with argv or argv[0] being NULL
450536 Powerpc: valgrind throws 'facility scv unavailable exception'
451626 Syscall param bpf(attr->raw_tracepoint.name) points to unaddressable byte(s)
451827 [ppc64le] VEX temporary storage exhausted with several vbpermq instructions
451843 valgrind fails to start on a FreeBSD system which enforces W^X
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed above.
(3.19.0.RC1: 02 Apr 2022)
(3.19.0.RC2: 08 Apr 2022)
Release 3.18.0 (15 Oct 2021)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, ARM64/Android, MIPS32/Android, X86/Android,
X86/Solaris, AMD64/Solaris, AMD64/MacOSX 10.12, X86/FreeBSD and
AMD64/FreeBSD. There is also preliminary support for X86/macOS 10.13,
AMD64/macOS 10.13 and nanoMIPS/Linux.
* ==================== CORE CHANGES ===================
* The libiberty demangler has been updated, which brings support for
Rust v0 name demangling. [Update: alas, due to a bug, this support
isn't working in 3.18.0.]
* __libc_freeres isn't called anymore after the program recieves a
fatal signal. Causing some internal glibc resources to hang around,
but preventing any crashes after the program has ended.
* The DWARF reader is now very much faster at startup when just
--read-inline-info=yes (the default in most cases) is given.
* glibc 2.34, which moved various functions from libpthread.so into
libc.so, is now supported.
* ================== PLATFORM CHANGES =================
* arm64:
- v8.2 scalar and vector FABD, FACGE, FACGT and FADD.
- v8.2 FP compare & conditional compare instructions.
- Zero variants of v8.2 FP compare instructions.
* s390:
- Support the miscellaneous-instruction-extensions facility 3 and
the vector-enhancements facility 2. This enables programs
compiled with "-march=arch13" or "-march=z15" to be executed
under Valgrind.
* ppc64:
- ISA 3.1 support is now complete
- ISA 3.0 support for the darn instruction added.
- ISA 3.0 support for the vector system call instruction scv added.
- ISA 3.0 support for the copy, paste and cpabort instructions added.
* Support for X86/FreeBSD and AMD64/FreeBSD has been added.
* ==================== OTHER CHANGES ====================
* Memcheck on amd64: minor fixes to remove some false positive
undef-value errors
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
208531 [PATCH]: FreeBSD support for valgrind
368960 WARNING: unhandled amd64-linux syscall: 163 (acct)
407589 [Linux] Add support for C11 aligned_alloc() and GNU reallocarray()
423963 Error in child thread when CLONE_PIDFD is used
426148 crash with "impossible happened" when running BPF CO-RE programs
429375 PPC ISA 3.1 support is missing, part 9
431157 PPC_FEATURE2_SCV needs to be masked in AT_HWCAP2
431306 Update demangler to support Rust v0 name mangling
432387 s390x: z15 instructions support
433437 FreeBSD support, part 1
433438 FreeBSD support, part 2
433439 FreeBSD support, part 3
433469 FreeBSD support, part 4
433473 FreeBSD support, part 5
433477 FreeBSD support, part 6
433479 FreeBSD support, part 7
433504 FreeBSD support, part 8
433506 FreeBSD support, part 9
433507 FreeBSD support, part 10
433508 FreeBSD support, part 11
433510 FreeBSD support, part 12
433801 PPC ISA 3.1 support is missing, part 10 (ISA 3.1 support complete)
433863 s390x: memcheck/tests/s390x/{cds,cs,csg} failures
434296 s390x: False-positive memcheck diagnostics from vector string
instructions
434840 PPC64 darn instruction not supported
435665 PPC ISA 3.0 copy, paste, cpabort instructions are not supported
435908 valgrind tries to fetch from deubginfod for files which already
have debug information
438871 unhandled instruction bytes: 0xF3 0x49 0xF 0x6F 0x9C 0x24 0x60 0x2
439046 valgrind is unusably large when linked with lld
439090 Implement close_range(2)
439326 Valgrind 3.17.0 won't compile with Intel 2021 oneAPI compilers
439590 glibc-2.34 breaks suppressions against obj:*/lib*/libc-2.*so*
440670 unhandled ppc64le-linux syscall: 252 statfs64 and 253 fstatfs64
440906 Fix impossible constraint issue in P10 testcase.
441512 Remove a unneeded / unnecessary prefix check.
441534 Update the expected output for test_isa_3_1_VRT.
442061 very slow execution under Fedora 34 (readdwarf3)
443031 Gcc -many change requires explicit .machine directives
443033 Add support for the ISA 3.0 mcrxrx instruction
443034 Sraw, srawi, srad, sradi, mfs
443178 Powerpc, test jm-mfspr expected output needs to be updated.
443179 Need new test for the lxvx and stxvx instructions on ISA 2.07 and
ISA 3.0 systems.
443180 The subnormal test and the ISA 3.0 test generate compiler warnings
443314 In the latest GIT version, Valgrind with "--trace-flags" crashes
at "al" register
443605 Don't call final_tidyup (__libc_freeres) on FatalSignal
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
(3.18.0.RC1: 12 Oct 2021)
(3.18.0: 15 Oct 2021)
Release 3.17.0 (19 Mar 2021)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.17.0 fixes a number of bugs and adds some functional changes: support for
GCC 11, Clang 11, DWARF5 debuginfo, the 'debuginfod' debuginfo server, and
some new instructions for Arm64, S390 and POWER. There are also some tool
updates.
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, ARM64/Android, MIPS32/Android, X86/Android,
X86/Solaris, AMD64/Solaris and AMD64/MacOSX 10.12. There is also preliminary
support for X86/macOS 10.13, AMD64/macOS 10.13 and nanoMIPS/Linux.
* ==================== CORE CHANGES ===================
* DWARF version 5 support. Valgrind can now read DWARF version 5 debuginfo as
produced by GCC 11.
* Valgrind now supports debuginfod, an HTTP server for distributing ELF/DWARF
debugging information. When a debuginfo file cannot be found locally,
Valgrind is able to query debuginfod servers for the file using its
build-id. See the user manual for more information about debuginfod support.
* ================== PLATFORM CHANGES =================
* arm64:
- Inaccuracies resulting from double-rounding in the simulation of
floating-point multiply-add/subtract instructions have been fixed. These
should now behave exactly as the hardware does.
- Partial support for the ARM v8.2 instruction set. v8.2 support work is
ongoing. Support for the half-word variants of at least the following
instructions has been added:
FABS <Hd>, <Hn>
FABS <Vd>.<T>, <Vn>.<T>
FNEG <Hd>, <Hn>
FNEG <Vd>.<T>, <Vn>.<T>
FSQRT <Hd>, <Hn>
FSQRT <Vd>.<T>, <Vn>.<T>
FADDP
* s390:
- Implement the new instructions/features that were added to z/Architecture
with the vector-enhancements facility 1. Also cover the instructions from
the vector-packed-decimal facility that are defined outside the chapter
"Vector Decimal Instructions", but not the ones from that chapter itself.
For a detailed list of newly supported instructions see the updates to
`docs/internals/s390-opcodes.csv'.
Since the miscellaneous instruction extensions facility 2 was already
added in Valgrind 3.16.0, this completes the support necessary to run
general programs built with `--march=z14' under Valgrind. The
vector-packed-decimal facility is currently not exploited by the standard
toolchain and libraries.
* ppc64:
- Various bug fixes. Fix for the sync field to limit setting just two of
the two bits in the L-field. Fix the write size for the stxsibx and
stxsihx instructions. Fix the modsw and modsd instructions.
- Partial support for ISA 3.1 has been added. Support for the VSX PCV mask
instructions, bfloat16 GER instructions, and bfloat16 to/from float 32-bit
conversion instructions are still missing.
* ==================== TOOL CHANGES ====================
* General tool changes
- All the tools and their vgpreload libraries are now installed under
libexec because they cannot be executed directly and should be run through
the valgrind executable. This should be an internal, not user visible,
change, but might impact valgrind packagers.
- The --track-fds option now respects -q, --quiet and won't output anything
if no file descriptors are leaked. It also won't report the standard stdin
(0), stdout (1) or stderr (2) descriptors as being leaked with
--trace-fds=yes anymore. To track whether the standard file descriptors
are still open at the end of the program run use --trace-fds=all.
* DHAT:
- DHAT has been extended, with two new modes of operation. The new
--mode=copy flag triggers copy profiling, which records calls to memcpy,
strcpy, and similar functions. The new --mode=ad-hoc flag triggers ad hoc
profiling, which records calls to the DHAT_AD_HOC_EVENT client request in
the new dhat/dhat.h file. This is useful for learning more about hot code
paths. See the user manual for more information about the new modes.
- Because of these changes, DHAT's file format has changed. DHAT output
files produced with earlier versions of DHAT will not work with this
version of DHAT's viewer, and DHAT output files produced with this version
of DHAT will not work with earlier versions of DHAT's viewer.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
140178 open("/proc/self/exe", ...); doesn't quite work
140939 --track-fds reports leakage of stdout/in/err and doesn't respect -q
217695 malloc/calloc/realloc/memalign failure doesn't set errno to ENOMEM
338633 gdbserver_tests/nlcontrolc.vgtest hangs on arm64
345077 linux syscall execveat support (linux 3.19)
361770 Missing F_ADD_SEALS
369029 handle linux syscalls sched_getattr and sched_setattr
384729 __libc_freeres inhibits cross-platform valgrind
388787 Support for C++17 new/delete
391853 Makefile.all.am:L247 and @SOLARIS_UNDEF_LARGESOURCE@ being empty
396656 Warnings while reading debug info
397605 ioctl FICLONE mishandled
401416 Compile failure with openmpi 4.0
408663 Suppression file for musl libc
404076 s390x: z14 vector instructions not implemented
410743 shmat() calls for 32-bit programs fail when running in 64-bit valgrind
(actually affected all x86 and nanomips regardless of host bitness)
413547 regression test does not check for Arm 64 features.
414268 Enable AArch64 feature detection and decoding for v8.x instructions
415293 Incorrect call-graph tracking due to new _dl_runtime_resolve_xsave*
422174 unhandled instruction bytes: 0x48 0xE9 (REX prefixed JMP instruction)
422261 platform selection fails for unqualified client name
422623 epoll_ctl warns for uninitialized padding on non-amd64 64bit arches
423021 PPC: Add missing ISA 3.0 documentation link and HWCAPS test.
423195 PPC ISA 3.1 support is missing, part 1
423361 Adds io_uring support on arm64/aarch64 (and all other arches)
424012 crash with readv/writev having invalid but not NULL arg2 iovec
424298 amd64: Implement RDSEED
425232 PPC ISA 3.1 support is missing, part 2
425820 Failure to recognize vpcmpeqq as a dependency breaking idiom.
426014 arm64: implement fmadd and fmsub as Iop_MAdd/Sub
426123 PPC ISA 3.1 support is missing, part 3
426144 Fix "condition variable has not been initialized" on Fedora 33.
427400 PPC ISA 3.1 support is missing, part 4
427401 PPC ISA 3.1 support is missing, part 5
427404 PPC ISA 3.1 support is missing, part 6
427870 lmw, lswi and related PowerPC insns aren't allowed on ppc64le
427787 Support new faccessat2 linux syscall (439)
427969 debuginfo section duplicates a section in the main ELF file
428035 drd: Unbreak the musl build
428648 s390_emit_load_mem panics due to 20-bit offset for vector load
428716 cppcheck detects potential leak in VEX/useful/smchash.c
428909 helgrind: need to intercept duplicate libc definitions for Fedora 33
429352 PPC ISA 3.1 support is missing, part 7
429354 PPC ISA 3.1 support is missing, part 8
429692 unhandled ppc64le-linux syscall: 147 (getsid)
429864 s390x: C++ atomic test_and_set yields false-positive memcheck
diagnostics
429952 Errors when building regtest with clang
430354 ppc stxsibx and stxsihx instructions write too much data
430429 valgrind.h doesn't compile on s390x with clang
430485 expr_is_guardable doesn't handle Iex_Qop
431556 Complete arm64 FADDP v8.2 instruction support
432102 Add support for DWARF5 as produced by GCC11
432161 Addition of arm64 v8.2 FADDP, FNEG and FSQRT
432381 drd: Process STACK_REGISTER client requests
432552 [AArch64] invalid error emitted for pre-decremented byte/hword addresses
432672 vg_regtest: test-specific environment variables not reset between tests
432809 VEX should support REX.W + POPF
432861 PPC modsw and modsd give incorrect results for 1 mod 12
432870 gdbserver_tests:nlcontrolc hangs with newest glibc2.33 x86-64
432215 Add debuginfod functionality
433323 Use pkglibexecdir as vglibdir
433500 DRD regtest faulures when libstdc++ and libgcc debuginfo are installed
433629 valgrind/README has type "abd" instead of "and"
433641 Rust std::sys::unix::fs::try_statx Syscall param fstatat(file_name)
433898 arm64: Handle sp, lr, fp as DwReg in CfiExpr
434193 GCC 9+ inlined strcmp causes "Conditional jump or move [..] value" report
n-i-bz helgrind: If hg_cli__realloc fails, return NULL.
n-i-bz arm64 front end: avoid Memcheck false positives relating to CPUID
(3.17.0.RC1: 13 Mar 2021)
(3.17.0.RC2: 17 Mar 2021)
(3.17.0: 19 Mar 2021)
Release 3.16.1 (22 June 2020)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.16.1 fixes two critical bugs discovered after 3.16.0 was frozen. It also
fixes character encoding problems in the documentation HTML.
422677 PPC sync instruction L field should only be 2 bits in ISA 3.0
422715 32-bit x86: vex: the `impossible' happened: expr_is_guardable: unhandled expr
(3.16.1, 22 June 2020, 36d6727e1d768333a536f274491e5879cab2c2f7)
Release 3.16.0 (27 May 2020)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.16.0 is a feature release with many improvements and the usual collection of
bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, ARM64/Android, MIPS32/Android, X86/Android,
X86/Solaris, AMD64/Solaris and AMD64/MacOSX 10.12. There is also preliminary
support for X86/macOS 10.13, AMD64/macOS 10.13 and nanoMIPS/Linux.
* ==================== CORE CHANGES ===================
* It is now possible to dynamically change the value of many command line
options while your program (or its children) are running under Valgrind.
To see the list of dynamically changeable options, run
"valgrind --help-dyn-options".
You can change the options from the shell by using vgdb to launch
the monitor command "v.clo <clo option>...".
The same monitor command can be used from a gdb connected
to the valgrind gdbserver.
Your program can also change the dynamically changeable options using
the client request VALGRIND_CLO_CHANGE(option).
* ================== PLATFORM CHANGES =================
* MIPS: preliminary support for nanoMIPS instruction set has been added.
* ==================== TOOL CHANGES ====================
* DHAT:
- The implicit memcpy done by each call to realloc now counts towards the
read and write counts of resized heap blocks, making those counts higher
and more accurate.
* Cachegrind:
- cg_annotate's --auto and --show-percs options now default to 'yes', because
they are usually wanted.
* Callgrind:
- callgrind_annotate's --auto and --show-percs options now default to 'yes',
because they are usually wanted.
- The command option --collect-systime has been enhanced to specify
the unit used to record the elapsed time spent during system calls.
The command option now accepts the values no|yes|msec|usec|nsec,
where yes is a synonym of msec. When giving the value nsec, the
system cpu time of system calls is also recorded.
* Memcheck:
- Several memcheck options are now dynamically changeable.
Use valgrind --help-dyn-options to list them.
- The release 3.15 introduced a backward incompatible change for
some suppression entries related to preadv and pwritev syscalls.
When reading a suppression entry using the unsupported 3.14 format,
valgrind will now produce a warning to say the suppression entry will not
work, and suggest the needed change.
- Significantly fewer false positive errors on optimised code generated by
Clang and GCC. In particular, Memcheck now deals better with the
situation where the compiler will transform C-level "A && B" into "B && A"
under certain circumstances (in which the transformation is valid).
Handling of integer equality/non-equality checks on partially defined
values is also improved on some architectures.
* exp-sgcheck:
- The exprimental Stack and Global Array Checking tool has been removed.
It only ever worked on x86 and amd64, and even on those it had a
high false positive rate and was slow. An alternative for detecting
stack and global array overruns is using the AddressSanitizer (ASAN)
facility of the GCC and Clang compilers, which require you to rebuild
your code with -fsanitize=address.
* ==================== OTHER CHANGES ====================
* New and modified GDB server monitor features:
- Option -T tells vgdb to output a timestamp in the vgdb information messages.
- The gdbserver monitor commands that require an address and an optional
length argument now accepts the alternate 'C like' syntax "address[length]".
For example, the memcheck command "monitor who_points_at 0x12345678 120"
can now also be given as "monitor who_points_at 0x12345678[120]".
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
343099 Linux setns syscall wrapper missing, unhandled syscall: 308
== 368923 WARNING: unhandled arm64-linux syscall: 268 (setns)
== 369031 WARNING: unhandled amd64-linux syscall: 308 (setns)
385386 Assertion failed "szB >= CACHE_ENTRY_SIZE" at m_debuginfo/image.c:517
400162 Patch: Guard against __GLIBC_PREREQ for musl libc
400593 In Coregrind, use statx for some internal syscalls if [f]stat[64] fail
400872 Add nanoMIPS support to Valgrind
403212 drd/tests/trylock hangs on FreeBSD
404406 s390x: z14 miscellaneous instructions not implemented
405201 Incorrect size of struct vki_siginfo on 64-bit Linux architectures
406561 mcinfcallWSRU gdbserver_test fails on ppc64
406824 Unsupported baseline
407218 Add support for the copy_file_range syscall
407307 Intercept stpcpy also in ld.so for arm64
407376 Update Xen support to 4.12 (4.13, actually) and add more coverage
== 390553
407764 drd cond_post_wait gets wrong (?) condition on s390x z13 system
408009 Expose rdrand and f16c even on avx if host cpu supports them
408091 Missing pkey syscalls
408414 Add support for missing for preadv2 and pwritev2 syscalls
409141 Valgrind hangs when SIGKILLed
409206 Support for Linux PPS and PTP ioctls
409367 exit_group() after signal to thread waiting in futex() causes hangs
409429 amd64: recognize 'cmpeq' variants as a dependency breaking idiom
409780 References to non-existent configure.in
410556 Add support for BLKIO{MIN,OPT} and BLKALIGNOFF ioctls
410599 Non-deterministic behaviour of pth_self_kill_15_other test
410757 discrepancy for preadv2/pwritev2 syscalls across different versions
411134 Allow the user to change a set of command line options during execution
411451 amd64->IR of bt/btc/bts/btr with immediate clears zero flag
412344 Problem setting mips flags with specific paths
412408 unhandled arm-linux syscall: 124 - adjtime - on arm-linux
413119 Ioctl wrapper for DRM_IOCTL_I915_GEM_MMAP
413330 avx-1 test fails on AMD EPYC 7401P 24-Core Processor
413603 callgrind_annotate/cg_annotate truncate function names at '#'
414565 Specific use case bug found in SysRes VG_(do_sys_sigprocmask)
415136 ARMv8.1 Compare-and-Swap instructions are not supported
415757 vex x86->IR: 0x66 0xF 0xCE 0x4F (bswapw)
416239 valgrind crashes when handling clock_adjtime
416285 Use prlimit64 in VG_(getrlimit) and VG_(setrlimit)
416286 DRD reports "conflicting load" error on std::mutex::lock()
416301 s390x: "compare and signal" not supported
416387 finit_module and bpf syscalls are unhandled on arm64
416464 Fix false reports for uninitialized memory for PR_CAPBSET_READ/DROP
416667 gcc10 ppc64le impossible constraint in 'asm' in test_isa.
416753 new 32bit time syscalls for 2038+
417075 pwritev(vector[...]) suppression ignored
417075 is not fixed, but incompatible supp entries are detected
and a warning is produced for these.
417187 [MIPS] Conditional branch problem since 'grail' changes
417238 Test memcheck/tests/vbit-test fails on mips64 BE
417266 Make memcheck/tests/linux/sigqueue usable with musl
417281 s390x: /bin/true segfaults with "grail" enabled
417427 commit to fix vki_siginfo_t definition created numerous regression
errors on ppc64
417452 s390_insn_store_emit: dst->tag for HRcVec128
417578 Add suppressions for glibc DTV leaks
417906 clone with CLONE_VFORK and no CLONE_VM fails
418004 Grail code additions break ppc64.
418435 s390x: spurious "Conditional jump or move depends on uninitialised [..]"
418997 s390x: Support Iex_ITE for float and vector types
419503 s390x: Avoid modifying registers returned from isel functions
421321 gcc10 arm64 build needs __getauxval for linking with libgcc
421570 std_mutex fails on Arm v8.1 h/w
434035 vgdb might crash if valgrind is killed
n-i-bz Fix minor one time leaks in dhat.
n-i-bz Add --run-cxx-freeres=no in outer args to avoid inner crashes.
n-i-bz Add support for the Linux io_uring system calls
n-i-bz sys_statx: don't complain if both |filename| and |buf| are NULL.
n-i-bz Fix non-glibc build of test suite with s390x_features
n-i-bz MinGW, include/valgrind.h: Fix detection of 64-bit mode
423195 PPC ISA 3.1 support is missing, part 1
(3.16.0.RC1: 18 May 2020, git 6052ee66a0cf5234e8e2a2b49a8760226bc13b92)
(3.16.0.RC2: 19 May 2020, git 940ec1ca69a09f7fdae3e800b7359f85c13c4b37)
(3.16.0: 27 May 2020, git bf5e647edb9e96cbd5c57cc944984402eeee296d)
Release 3.15.0 (12 April 2019)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.15.0 is a feature release with many improvements and the usual collection of
bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, ARM64/Android, MIPS32/Android, X86/Android,
X86/Solaris, AMD64/Solaris and AMD64/MacOSX 10.12. There is also preliminary
support for X86/macOS 10.13 and AMD64/macOS 10.13.
* ==================== CORE CHANGES ===================
* The XTree Massif output format now makes use of the information obtained
when specifying --read-inline-info=yes.
* amd64 (x86_64): the RDRAND and F16C insn set extensions are now supported.
* ==================== TOOL CHANGES ====================
* DHAT:
- DHAT been thoroughly overhauled, improved, and given a GUI. As a result,
it has been promoted from an experimental tool to a regular tool. Run it
with --tool=dhat instead of --tool=exp-dhat.
- DHAT now prints only minimal data when the program ends, instead writing
the bulk of the profiling data to a file. As a result, the --show-top-n
and --sort-by options have been removed.
- Profile results can be viewed with the new viewer, dh_view.html. When
a run ends, a short message is printed, explaining how to view the result.
- See the documentation for more details.
* Cachegrind:
- cg_annotate has a new option, --show-percs, which prints percentages next
to all event counts.
* Callgrind:
- callgrind_annotate has a new option, --show-percs, which prints percentages
next to all event counts.
- callgrind_annotate now inserts commas in call counts, and
sort the caller/callee lists in the call tree.
* Massif:
- The default value for --read-inline-info is now "yes" on
Linux/Android/Solaris. It is still "no" on other OS.
* Memcheck:
- The option --xtree-leak=yes (to output leak result in xtree format)
automatically activates the option --show-leak-kinds=all, as xtree
visualisation tools such as kcachegrind can in any case select what kind
of leak to visualise.
- There has been further work to avoid false positives. In particular,
integer equality on partially defined inputs (C == and !=) is now handled
better.
* ==================== OTHER CHANGES ====================
* The new option --show-error-list=no|yes displays, at the end of the run, the
list of detected errors and the used suppressions. Prior to this change,
showing this information could only be done by specifying "-v -v", but that
also produced a lot of other possibly-non-useful messages. The option -s is
equivalent to --show-error-list=yes.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
385411 s390x: z13 vector floating-point instructions not implemented
397187 z13 vector register support for vgdb gdbserver
398183 Vex errors with _mm256_shuffle_epi8/vpshufb
398870 Please add support for instruction vcvtps2ph
399287 amd64 front end: Illegal Instruction vcmptrueps
399301 Use inlined frames in Massif XTree output.
399322 Improve callgrind_annotate output
399444 VEX/priv/guest_s390_toIR.c:17407: (style) Mismatching assignment [..]
400164 helgrind test encounters mips x-compiler warnings and assembler error
400490 s390x: VRs allocated as if separate from FPRs
400491 s390x: Operand of LOCH treated as unsigned integer
400975 Compile error: error: '-mips64r2' conflicts with the other architecture
options, which specify a mips64 processor
401112 LLVM 5.0 generates comparison against partially initialized data
401277 More bugs in z13 support
401454 Add a --show-percs option to cg_annotate and callgrind_annotate.
401578 drd: crashes sometimes on fork()
401627 memcheck errors with glibc avx2 optimized wcsncmp
401822 none/tests/ppc64/jm-vmx fails and produces assembler warnings
401827 none/tests/ppc64/test_isa_2_06_part3 failure on ppc64le (xvrsqrtesp)
401828 none/tests/ppc64/test_isa_2_06_part1 failure on ppc64le (fcfids and
fcfidus)
402006 mark helper regs defined in final_tidyup before freeres_wrapper call
402048 WARNING: unhandled ppc64[be|le]-linux syscall: 26 (ptrace)
402123 invalid assembler opcodes for mips32r2
402134 assertion fail in mc_translate.c (noteTmpUsesIn) Iex_VECRET on arm64
402327 Warning: DWARF2 CFI reader: unhandled DW_OP_ opcode 0x13 (DW_OP_drop)
402341 drd/tests/tsan_thread_wrappers_pthread.h:369: suspicious code ?
402351 mips64 libvexmultiarch_test fails on s390x
402369 Overhaul DHAT
402395 coregrind/vgdb-invoker-solaris.c: 2 * poor error checking
402480 Do not use %rsp in clobber list
402481 vbit-test fails on x86 for Iop_CmpEQ64 iselInt64Expr Sar64
402515 Implement new option --show-error-list=no|yes / -s
402519 POWER 3.0 addex instruction incorrectly implemented
402781 Redo the cache used to process indirect branch targets
403123 vex amd64->IR:0xF3 0x48 0xF 0xAE 0xD3 (wrfsbase)
403552 s390x: wrong facility bit checked for vector facility
404054 memcheck powerpc subfe x, x, x initializes x to 0 or -1 based on CA
404638 Add VG_(replaceIndexXA)
404843 s390x: backtrace sometimes ends prematurely
404888 autotools cleanup series
405079 unhandled ppc64le-linux syscall: 131 (quotactl)
405182 Valgrind fails to build with Clang
405205 filter_libc: remove the line holding the futex syscall error entirely
405356 PPC64, xvcvsxdsp, xvcvuxdsp are supposed to write the 32-bit result to
the upper and lower 32-bits of the 64-bit result
405362 PPC64, vmsummbm instruction doesn't handle overflow case correctly
405363 PPC64, xvcvdpsxws, xvcvdpuxws, do not handle NaN arguments correctly.
405365 PPC64, function _get_maxmin_fp_NaN() doesn't handle QNaN, SNaN case
correctly.
405403 s390x disassembler cannot be used on x86
405430 Use gcc -Wimplicit-fallthrough=2 by default if available
405458 MIPS mkFormVEC arguments swapped?
405716 drd: Fix an integer overflow in the stack margin calculation
405722 Support arm64 core dump
405733 PPC64, xvcvdpsp should write 32-bit result to upper and lower 32-bits
of the 64-bit destination field.
405734 PPC64, vrlwnm, vrlwmi, vrldrm, vrldmi do not work properly when me < mb
405782 "VEX temporary storage exhausted" when attempting to debug slic3r-pe
406198 none/tests/ppc64/test_isa_3_0_other test sporadically including CA
bit in output.
406256 PPC64, vector floating point instructions don't handle subnormal
according to VSCR[NJ] bit setting.
406352 cachegrind/callgrind fails ann tests because of missing a.c
406354 dhat is broken on x86 (32bit)
406355 mcsignopass, mcsigpass, mcbreak fail due to difference in gdb output
406357 gdbserver_tests fails because of gdb output change
406360 memcheck/tests/libstdc++.supp needs more supression variants
406422 none/tests/amd64-linux/map_32bits.vgtest fails too easily
406465 arm64 insn selector fails on "t0 = <expr>" where <expr> has type Ity_F16
407340 PPC64, does not support the vlogefp, vexptefp instructions.
n-i-bz add syswrap for PTRACE_GET|SET_THREAD_AREA on amd64.
n-i-bz Fix callgrind_annotate non deterministic order for equal total
n-i-bz callgrind_annotate --threshold=100 does not print all functions.
n-i-bz callgrind_annotate Use of uninitialized value in numeric gt (>)
n-i-bz amd64 (x86_64): RDRAND and F16C insn set extensions are supported
(3.15.0.RC1: 8 April 2019, git ce94d674de5b99df173aad4c3ee48fc2a92e5d9c)
(3.15.0.RC2: 11 April 2019, git 0c8be9bbede189ec580ec270521811766429595f)
(3.15.0: 14 April 2019, git 270037da8b508954f0f7d703a0bebf5364eec548)
Release 3.14.0 (9 October 2018)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.14.0 is a feature release with many improvements and the usual collection of
bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, ARM64/Android, MIPS32/Android, X86/Android,
X86/Solaris, AMD64/Solaris and AMD64/MacOSX 10.12. There is also preliminary
support for X86/macOS 10.13, AMD64/macOS 10.13.
* ==================== CORE CHANGES ===================
* The new option --keep-debuginfo=no|yes (default no) can be used to retain
debug info for unloaded code. This allows saved stack traces (e.g. for
memory leaks) to include file/line info for code that has been dlclose'd (or
similar). See the user manual for more information and known limitations.
* Ability to specify suppressions based on source file name and line number.
* Majorly overhauled register allocator. No end-user changes, but the JIT
generates code a bit more quickly now.
* ================== PLATFORM CHANGES =================
* Preliminary support for macOS 10.13 has been added.
* mips: support for MIPS32/MIPS64 Revision 6 has been added.
* mips: support for MIPS SIMD architecture (MSA) has been added.
* mips: support for MIPS N32 ABI has been added.
* s390: partial support for vector instructions (integer and string) has been
added.
* ==================== TOOL CHANGES ====================
* Helgrind: Addition of a flag
--delta-stacktrace=no|yes [yes on linux amd64/x86]
which specifies how full history stack traces should be computed.
Setting this to =yes can speed up Helgrind by 25% when using
--history-level=full.
* Memcheck: reduced false positive rate for optimised code created by Clang 6
/ LLVM 6 on x86, amd64 and arm64. In particular, Memcheck analyses code
blocks more carefully to determine where it can avoid expensive definedness
checks without loss of precision. This is controlled by the flag
--expensive-definedness-checks=no|auto|yes [auto].
* ==================== OTHER CHANGES ====================
* Valgrind is now buildable with link-time optimisation (LTO). A new
configure option --enable-lto=yes allows building Valgrind with LTO. If the
toolchain supports it, this produces a smaller/faster Valgrind (up to 10%).
Note that if you are doing Valgrind development, --enable-lto=yes massively
slows down the build process.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
79362 Debug info is lost for .so files when they are dlclose'd
208052 strlcpy error when n = 0
255603 exp-sgcheck Assertion '!already_present' failed
338252 building valgrind with -flto (link time optimisation) fails
345763 MIPS N32 ABI support
368913 WARNING: unhandled arm64-linux syscall: 117 (ptrace)
== 388664 unhandled arm64-linux syscall: 117 (ptrace)
372347 Replacement problem of the additional c++14/c++17 new/delete operators
373069 memcheck/tests/leak_cpp_interior fails with GCC 5.1+
376257 helgrind history full speed up using a cached stack
379373 Fix syscall param msg->desc.port.name points to uninitialised byte(s)
on macOS 10.12
379748 Fix missing pselect syscall (OS X 10.11)
379754 Fix missing syscall ulock_wait (OS X 10.12)
380397 s390x: __GI_strcspn() replacemenet needed
381162 possible array overrun in VEX register allocator
381272 ppc64 doesn't compile test_isa_2_06_partx.c without VSX support
381274 powerpc too chatty even with --sigill-diagnostics=no
381289 epoll_pwait can have a NULL sigmask
381553 VEX register allocator v3
381556 arm64: Handle feature registers access on 4.11 Linux kernel or later
381769 Use ucontext_t instead of struct ucontext
381805 arm32 needs ld.so index hardwire for new glibc security fixes
382256 gz compiler flag test doesn't work for gold
382407 vg_perf needs "--terse" command line option
382515 "Assertion 'di->have_dinfo' failed." on wine's dlls/mscoree/tests/[..]
382563 MIPS MSA ASE support
382998 xml-socket doesn't work
383275 massif: m_xarray.c:162 (ensureSpaceXA): Assertion '!xa->arr' failed
383723 Fix missing kevent_qos syscall (macOS 10.11)
== 385604 illegal hardware instruction (OpenCV cv::namedWindow)
384096 Mention AddrCheck at Memcheck's command line option [..]
384230 vex x86->IR: 0x67 0xE8 0xAB 0x68
== 384156 vex x86->IR: 0x67 0xE8 0x6B 0x6A
== 386115 vex x86->IR: 0x67 0xE8 0xD3 0x8B any program
== 388407 vex x86->IR: 0x67 0xE8 0xAB 0x29
== 394903 vex x86->IR: 0x67 0xE8 0x1B 0xDA
384337 performance improvements to VEX register allocator v2 and v3
384526 reduce number of spill insns generated by VEX register allocator v3
384584 Callee saved regs listed first for AMD64, X86, and PPC architectures
384631 Sanitise client args as printed with -v
384633 Add a simple progress-reporting facility
384987 VEX regalloc: allocate caller-save registers for short lived vregs
385055 PPC VEX temporary storage exhausted
385182 PPC64 is missing support for the DSCR
385183 PPC64, Add support for xscmpeqdp, xscmpgtdp, xscmpgedp, xsmincdp
385207 PPC64, generate_store_FPRF() generates too many Iops
385208 PPC64, xxperm instruction exhausts temporary memory
385210 PPC64, vpermr instruction could exhaust temporary memory
385279 unhandled syscall: mach:43 (mach_generate_activity_id)
== 395136 valgrind: m_syswrap/syswrap-main.c:438 (Bool eq_Syscall[..]
== 387045 Valgrind crashing on High Sierra when testing any newly [..]
385334 PPC64, fix vpermr, xxperm, xxpermr mask value.
385408 s390x: z13 vector "support" instructions not implemented
385409 s390x: z13 vector integer instructions not implemented
385410 s390x: z13 vector string instructions not implemented
385412 s390x: new non-vector z13 instructions not implemented
385868 glibc ld.so _dl_runtime_resolve_avx_slow conditional jump warning.
385912 none/tests/rlimit_nofile fails on newer glibc/kernel.
385939 Optionally exit on the first error
386318 valgrind.org/info/tools.html is missing SGCheck
386425 running valgrind + wine on armv7l gives illegal opcode
386397 PPC64, valgrind truncates powerpc timebase to 32-bits.
387410 MIPSr6 support
387664 Memcheck: make expensive-definedness-checks be the default
387712 s390x cgijnl reports Conditional jump depends on uninitialised value
387766 asm shifts cause false positive "Conditional jump or move depends
on uninitialised value"
387773 .gnu_debugaltlink paths resolve relative to .debug file, not symlink
388174 valgrind with Wine quits with "Assertion 'cfsi_fits' failed"
388786 Support bpf syscall in amd64 Linux
388862 Add replacements for wmemchr and wcsnlen on Linux
389065 valgrind meets gcc flag -Wlogical-op
389373 exp-sgcheck the 'impossible' happened as Ist_LoadG is not instrumented
390471 suppression by specification of source-file line number
390723 make xtree dump files world wide readable, similar to log files
391164 constraint bug in tests/ppc64/test_isa_2_07_part1.c for mtfprwa
391861 Massif Assertion 'n_ips >= 1 && n_ips <= VG_(clo_backtrace_size)'
392118 unhandled amd64-linux syscall: 332 (statx)
392449 callgrind not clearing the number of calls properly
393017 Add missing support for xsmaxcdp instruction, bug fixes for xsmincdp,
lxssp, stxssp and stxvl instructions.
393023 callgrind_control risks using the wrong vgdb
393062 build-id ELF phdrs read causes "debuginfo reader: ensure_valid failed"
393099 posix_memalign() invalid write if alignment == 0
393146 failing assert "is_DebugInfo_active(di)"
395709 PPC64 is missing support for the xvnegsp instruction
395682 Accept read-only PT_LOAD segments and .rodata by ld -z separate-code
== 384727
396475 valgrind OS-X build: config.h not found (out-of-tree macOS builds)
395991 arm-linux: wine's unit tests enter a signal delivery loop [..]
396839 s390x: Trap instructions not implemented
396887 arch_prctl should return EINVAL on unknown option
== 397286 crash before launching binary (Unsupported arch_prctl option)
== 397393 valgrind: the 'impossible' happened: (Archlinux)
== 397521 valgrind: the 'impossible' happened: Unsupported [..]
396906 compile tests failure on mips32-linux: broken inline asm in tests on
mips32-linux
397012 glibc ld.so uses arch_prctl on i386
397089 amd64: Incorrect decoding of three-register vmovss/vmovsd opcode 11h
397354 utimensat should ignore timespec tv_sec if tv_nsec is UTIME_NOW/OMIT
397424 glibc 2.27 and gdb_server tests
398028 Assertion `cfsi_fits` failing in simple C program
398066 s390x: cgijl dep1, 0 reports false unitialised values warning
n-i-bz Fix missing workq_ops operations (macOS)
n-i-bz fix bug in strspn replacement
n-i-bz Add support for the Linux BLKFLSBUF ioctl
n-i-bz Add support for the Linux BLKREPORTZONE and BLKRESETZONE ioctls
n-i-bz Fix possible stack trashing by semctl syscall wrapping
n-i-bz Add support for the Linux membarrier() system call
n-i-bz x86 front end: recognise and handle UD2 correctly
n-i-bz Signal delivery for x86-linux: ensure that the stack pointer is
correctly aligned before entering the handler.
(3.14.0.RC1: 30 September 2018, git c2aeea2d28acb0639bcc8cc1e4ab115067db1eae)
(3.14.0.RC2: 3 October 2018, git 3e214c4858a6fdd5697e767543a0c19e30505582)
(3.14.0: 9 October 2018, git 353a3587bb0e2757411f9138f5e936728ed6cc4f)
Release 3.13.0 (15 June 2017)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.13.0 is a feature release with many improvements and the usual collection of
bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, ARM64/Android, MIPS32/Android, X86/Android,
X86/Solaris, AMD64/Solaris and AMD64/MacOSX 10.12.
* ==================== CORE CHANGES ===================
* The translation cache size has been increased to keep up with the demands of
large applications. The maximum number of sectors has increased from 24 to
48. The default number of sectors has increased from 16 to 32 on all
targets except Android, where the increase is from 6 to 12.
* The amount of memory that Valgrind can use has been increased from 64GB to
128GB. In particular this means your application can allocate up to about
60GB when running on Memcheck.
* Valgrind's default load address has been changed from 0x3800'0000 to
0x5800'0000, so as to make it possible to load larger executables. This
should make it possible to load executables of size at least 1200MB.
* A massive spaceleak caused by reading compressed debuginfo files has been
fixed. Valgrind should now be entirely usable with gcc-7.0 "-gz" created
debuginfo.
* The C++ demangler has been updated.
* Support for demangling Rust symbols has been added.
* A new representation of stack traces, the "XTree", has been added. An XTree
is a tree of stacktraces with data associated with the stacktraces. This is
used by various tools (Memcheck, Helgrind, Massif) to report on the heap
consumption of your program. Reporting is controlled by the new options
--xtree-memory=none|allocs|full and --xtree-memory-file=<file>.
A report can also be produced on demand using the gdbserver monitor command
'xtmemory [<filename>]>'. The XTree can be output in 2 formats: 'callgrind
format' and 'massif format. The existing visualisers for these formats (e.g.
callgrind_annotate, KCachegrind, ms_print) can be used to visualise and
analyse these reports.
Memcheck can also produce XTree leak reports using the Callgrind file
format. For more details, see the user manual.
* ================== PLATFORM CHANGES =================
* ppc64: support for ISA 3.0B and various fixes for existing 3.0 support
* amd64: fixes for JIT failure problems on long AVX2 code blocks
* amd64 and x86: support for CET prefixes has been added
* arm32: a few missing ARMv8 instructions have been implemented
* arm64, mips64, mips32: an alternative implementation of Load-Linked and
Store-Conditional instructions has been added. This is to deal with
processor implementations that implement the LL/SC specifications strictly
and as a result cause Valgrind to hang in certain situations. The
alternative implementation is automatically enabled at startup, as required.
You can use the option --sim-hints=fallback-llsc to force-enable it if you
want.
* Support for OSX 10.12 has been improved.
* On Linux, clone handling has been improved to honour CLONE_VFORK that
involves a child stack. Note however that CLONE_VFORK | CLONE_VM is handled
like CLONE_VFORK (by removing CLONE_VM), so applications that depend on
CLONE_VM exact semantics will (still) not work.
* The TileGX/Linux port has been removed because it appears to be both unused
and unsupported.
* ==================== TOOL CHANGES ====================
* Memcheck:
- Memcheck should give fewer false positives when running optimised
Clang/LLVM generated code.
- Support for --xtree-memory and 'xtmemory [<filename>]>'.
- New command line options --xtree-leak=no|yes and --xtree-leak-file=<file>
to produce the end of execution leak report in a xtree callgrind format
file.
- New option 'xtleak' in the memcheck leak_check monitor command, to produce
the leak report in an xtree file.
* Massif:
- Support for --xtree-memory and 'xtmemory [<filename>]>'.
- For some workloads (typically, for big applications), Massif memory
consumption and CPU consumption has decreased significantly.
* Helgrind:
- Support for --xtree-memory and 'xtmemory [<filename>]>'.
- addition of client request VALGRIND_HG_GNAT_DEPENDENT_MASTER_JOIN, useful
for Ada gnat compiled applications.
* ==================== OTHER CHANGES ====================
* For Valgrind developers: in an outer/inner setup, the outer Valgrind will
append the inner guest stacktrace to the inner host stacktrace. This helps
to investigate the errors reported by the outer, when they are caused by the
inner guest program (such as an inner regtest). See README_DEVELOPERS for
more info.
* To allow fast detection of callgrind files by desktop environments and file
managers, the format was extended to have an optional first line that
uniquely identifies the format ("# callgrind format"). Callgrind creates
this line now, as does the new xtree functionality.
* File name template arguments (such as --log-file, --xtree-memory-file, ...)
have a new %n format letter that is replaced by a sequence number.
* "--version -v" now shows the SVN revision numbers from which Valgrind was
built.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
162848 --log-file output isn't split when a program forks
340777 Illegal instruction on mips (ar71xx)
341481 MIPS64: Iop_CmpNE32 triggers false warning on MIPS64 platforms
342040 Valgrind mishandles clone with CLONE_VFORK | CLONE_VM that clones
to a different stack.
344139 x86 stack-seg overrides, needed by the Wine people
344524 store conditional of guest applications always fail - observed on
Octeon3(MIPS)
348616 Wine/valgrind: noted but unhandled ioctl 0x5390 [..] (DVD_READ_STRUCT)
352395 Please provide SVN revision info in --version -v
352767 Wine/valgrind: noted but unhandled ioctl 0x5307 [..] (CDROMSTOP)
356374 Assertion 'DRD_(g_threadinfo)[tid].pt_threadid !=
INVALID_POSIX_THREADID' failed
358213 helgrind/drd bar_bad testcase hangs or crashes with new glibc pthread
barrier implementation
358697 valgrind.h: Some code remains even when defining NVALGRIND
359202 Add musl libc configure/compile
360415 amd64 instructions ADCX and ADOX are not implemented in VEX
== 372828 (vex amd64->IR: 0x66 0xF 0x3A 0x62 0x4A 0x10)
360429 unhandled ioctl 0x530d with no size/direction hints (CDROMREADMODE1)
362223 assertion failed when .valgrindrc is a directory instead of a file
367543 bt/btc/btr/bts x86/x86_64 instructions are poorly-handled wrt flags
367942 Segfault vgPlain_do_sys_sigaction (m_signals.c:1138)
368507 can't malloc chunks larger than about 34GB
368529 Android arm target link error, missing atexit and pthread_atfork
368863 WARNING: unhandled arm64-linux syscall: 100 (get_robust_list)
368865 WARNING: unhandled arm64-linux syscall: 272 (kcmp)
368868 disInstr(arm64): unhandled instruction 0xD53BE000 = cntfrq_el0 (ARMv8)
368917 WARNING: unhandled arm64-linux syscall: 218 (request_key)
368918 WARNING: unhandled arm64-linux syscall: 127 (sched_rr_get_interval)
368922 WARNING: unhandled arm64-linux syscall: 161 (sethostname)
368924 WARNING: unhandled arm64-linux syscall: 84 (sync_file_range)
368925 WARNING: unhandled arm64-linux syscall: 130 (tkill)
368926 WARNING: unhandled arm64-linux syscall: 97 (unshare)
369459 valgrind on arm64 violates the ARMv8 spec (ldxr/stxr)
370028 Reduce the number of compiler warnings on MIPS platforms
370635 arm64 missing syscall getcpu
371225 Fix order of timer_{gettime,getoverrun,settime} syscalls on arm64
371227 Clean AArch64 syscall table
371412 Rename wrap_sys_shmat to sys_shmat like other wrappers
371471 Valgrind complains about non legit memory leaks on placement new (C++)
371491 handleAddrOverrides() is [incorrect] when ASO prefix is used
371503 disInstr(arm64): unhandled instruction 0xF89F0000
371869 support '%' in symbol Z-encoding
371916 execution tree xtree concept
372120 c++ demangler demangles symbols which are not c++
372185 Support of valgrind on ARMv8 with 32 bit executable
372188 vex amd64->IR: 0x66 0xF 0x3A 0x62 0x4A 0x10 0x10 0x48 (PCMPxSTRx $0x10)
372195 Power PC, xxsel instruction is not always recognized.
372504 Hanging on exit_group
372600 process loops forever when fatal signals are arriving quickly
372794 LibVEX (arm32 front end): 'Assertion szBlg2 <= 3' failed
373046 Stacks registered by core are never deregistered
373069 memcheck/tests/leak_cpp_interior fails with GCC 5.1+
373086 Implement additional Xen hypercalls
373192 Calling posix_spawn in glibc 2.24 completely broken
373488 Support for fanotify API on ARM64 architecture
== 368864 WARNING: unhandled arm64-linux syscall: 262 (fanotify_init)
373555 Rename BBPTR to GSPTR as it denotes guest state pointer only
373938 const IRExpr arguments for matchIRExpr()
374719 some spelling fixes
374963 increase valgrind's load address to prevent mmap failure
375514 valgrind_get_tls_addr() does not work in case of static TLS
375772 +1 error in get_elf_symbol_info() when computing value of 'hi' address
for ML_(find_rx_mapping)()
375806 Test helgrind/tests/tc22_exit_w_lock fails with glibc 2.24
375839 Temporary storage exhausted, with long sequence of vfmadd231ps insns
== 377159 "vex: the `impossible' happened" still present
== 375150 Assertion 'tres.status == VexTransOK' failed
== 378068 valgrind crashes on AVX2 function in FFmpeg
376142 Segfaults on MIPS Cavium Octeon boards
376279 disInstr(arm64): unhandled instruction 0xD50320FF
376455 Solaris: unhandled syscall lgrpsys(180)
376518 Solaris: unhandled fast trap getlgrp(6)
376611 ppc64 and arm64 don't know about prlimit64 syscall
376729 PPC64, remove R2 from the clobber list
== 371668
376956 syswrap of SNDDRV and DRM_IOCTL_VERSION causing some addresses
to be wrongly marked as addressable
377066 Some Valgrind unit tests fail to compile on Ubuntu 16.10 with
PIE enabled by default
377376 memcheck/tests/linux/getregset fails with glibc2.24
377427 PPC64, lxv instruction failing on odd destination register
377478 PPC64: ISA 3.0 setup fixes
377698 Missing memory check for futex() uaddr arg for FUTEX_WAKE
and FUTEX_WAKE_BITSET, check only 4 args for FUTEX_WAKE_BITSET,
and 2 args for FUTEX_TRYLOCK_PI
377717 Fix massive space leak when reading compressed debuginfo sections
377891 Update Xen 4.6 domctl wrappers
377930 fcntl syscall wrapper is missing flock structure check
378524 libvexmultiarch_test regression on s390x and ppc64
378535 Valgrind reports INTERNAL ERROR in execve syscall wrapper
378673 Update libiberty demangler
378931 Add ISA 3.0B additional isnstructions, add OV32, CA32 setting support
379039 syscall wrapper for prctl(PR_SET_NAME) must not check more than 16 bytes
379094 Valgrind reports INTERNAL ERROR in rt_sigsuspend syscall wrapper
379371 UNKNOWN task message [id 3444, to mach_task_self(), reply 0x603]
(task_register_dyld_image_infos)
379372 UNKNOWN task message [id 3447, to mach_task_self(), reply 0x603]
(task_register_dyld_shared_cache_image_info)
379390 unhandled syscall: mach:70 (host_create_mach_voucher_trap)
379473 MIPS: add support for rdhwr cycle counter register
379504 remove TileGX/Linux port
379525 Support more x86 nop opcodes
379838 disAMode(x86): not an addr!
379703 PC ISA 3.0 fixes: stxvx, stxv, xscmpexpdp instructions
379890 arm: unhandled instruction: 0xEBAD 0x1B05 (sub.w fp, sp, r5, lsl #4)
379895 clock_gettime does not execute POST syscall wrapper
379925 PPC64, mtffs does not set the FPCC and C bits in the FPSCR correctly
379966 WARNING: unhandled amd64-linux syscall: 313 (finit_module)
380200 xtree generated callgrind files refer to files without directory name
380202 Assertion failure for cache line size (cls == 64) on aarch64.
380397 s390x: __GI_strcspn() replacement needed
n-i-bz Fix pub_tool_basics.h build issue with g++ 4.4.7.
(3.13.0.RC1: 2 June 2017, vex r3386, valgrind r16434)
(3.13.0.RC2: 9 June 2017, vex r3389, valgrind r16443)
(3.13.0: 14 June 2017, vex r3396, valgrind r16446)
Release 3.12.0 (20 October 2016)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.12.0 is a feature release with many improvements and the usual
collection of bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM32/Linux,
ARM64/Linux, PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux,
MIPS32/Linux, MIPS64/Linux, ARM/Android, ARM64/Android,
MIPS32/Android, X86/Android, X86/Solaris, AMD64/Solaris, X86/MacOSX
10.10 and AMD64/MacOSX 10.10. There is also preliminary support for
X86/MacOSX 10.11/12, AMD64/MacOSX 10.11/12 and TILEGX/Linux.
* ================== PLATFORM CHANGES =================
* POWER: Support for ISA 3.0 has been added
* mips: support for O32 FPXX ABI has been added.
* mips: improved recognition of different processors
* mips: determination of page size now done at run time
* amd64: Partial support for AMD FMA4 instructions.
* arm, arm64: Support for v8 crypto and CRC instructions.
* Improvements and robustification of the Solaris port.
* Preliminary support for MacOS 10.12 (Sierra) has been added.
Whilst 3.12.0 continues to support the 32-bit x86 instruction set, we
would prefer users to migrate to 64-bit x86 (a.k.a amd64 or x86_64)
where possible. Valgrind's support for 32-bit x86 has stagnated in
recent years and has fallen far behind that for 64-bit x86
instructions. By contrast 64-bit x86 is well supported, up to and
including AVX2.
* ==================== TOOL CHANGES ====================
* Memcheck:
- Added meta mempool support for describing a custom allocator which:
- Auto-frees all chunks assuming that destroying a pool destroys all
objects in the pool
- Uses itself to allocate other memory blocks
- New flag --ignore-range-below-sp to ignore memory accesses below
the stack pointer, if you really have to. The related flag
--workaround-gcc296-bugs=yes is now deprecated. Use
--ignore-range-below-sp=1024-1 as a replacement.
* DRD:
- Improved thread startup time significantly on non-Linux platforms.
* DHAT
- Added collection of the metric "tot-blocks-allocd"
* ==================== OTHER CHANGES ====================
* Replacement/wrapping of malloc/new related functions is now done not just
for system libraries by default, but for any globally defined malloc/new
related function (both in shared libraries and statically linked alternative
malloc implementations). The dynamic (runtime) linker is excluded, though.
To only intercept malloc/new related functions in
system libraries use --soname-synonyms=somalloc=nouserintercepts (where
"nouserintercepts" can be any non-existing library name).
This new functionality is not implemented for MacOS X.
* The maximum number of callers in a suppression entry is now equal to
the maximum size for --num-callers (500).
Note that --gen-suppressions=yes|all similarly generates suppressions
containing up to --num-callers frames.
* New and modified GDB server monitor features:
- Valgrind's gdbserver now accepts the command 'catch syscall'.
Note that you must have GDB >= 7.11 to use 'catch syscall' with
gdbserver.
* New option --run-cxx-freeres=<yes|no> can be used to change whether
__gnu_cxx::__freeres() cleanup function is called or not. Default is
'yes'.
* Valgrind is able to read compressed debuginfo sections in two formats:
- zlib ELF gABI format with SHF_COMPRESSED flag (gcc option -gz=zlib)
- zlib GNU format with .zdebug sections (gcc option -gz=zlib-gnu)
* Modest JIT-cost improvements: the cost of instrumenting code blocks
for the most common use case (x86_64-linux, Memcheck) has been
reduced by 10%-15%.
* Improved performance for programs that do a lot of discarding of
instruction address ranges of 8KB or less.
* The C++ symbol demangler has been updated.
* More robustness against invalid syscall parameters on Linux.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
191069 Exiting due to signal not reported in XML output
199468 Suppressions: stack size limited to 25
while --num-callers allows more frames
212352 vex amd64 unhandled opc_aux = 0x 2, first_opcode == 0xDC (FCOM)
278744 cvtps2pd with redundant RexW
303877 valgrind doesn't support compressed debuginfo sections.
345307 Warning about "still reachable" memory when using libstdc++ from gcc 5
348345 Assertion fails for negative lineno
348924 MIPS: Load doubles through memory so the code compiles with the FPXX ABI
351282 V 3.10.1 MIPS softfloat build broken with GCC 4.9.3 / binutils 2.25.1
351692 Dumps created by valgrind are not readable by gdb (mips32 specific)
351804 Crash on generating suppressions for "printf" call on OS X 10.10
352197 mips: mmap2() not wrapped correctly for page size > 4096
353083 arm64 doesn't implement various xattr system calls
353084 arm64 doesn't support sigpending system call
353137 www: update info for Supported Platforms
353138 www: update "The Valgrind Developers" page
353370 don't advertise RDRAND in cpuid for Core-i7-4910-like avx2 machine
== 365325
== 357873
353384 amd64->IR: 0x66 0xF 0x3A 0x62 0xD1 0x62 (pcmpXstrX $0x62)
353398 WARNING: unhandled amd64-solaris syscall: 207
353660 XML in auxwhat tag not escaping reserved symbols properly
353680 s390x: Crash with certain glibc versions due to non-implemented TBEGIN
353727 amd64->IR: 0x66 0xF 0x3A 0x62 0xD1 0x72 (pcmpXstrX $0x72)
353802 ELF debug info reader confused with multiple .rodata sections
353891 Assert 'bad_scanned_addr < VG_ROUNDDN(start+len, sizeof(Addr))' failed
353917 unhandled amd64-solaris syscall fchdir(120)
353920 unhandled amd64-solaris syscall: 170
354274 arm: unhandled instruction: 0xEBAD 0x0AC1 (sub.w sl, sp, r1, lsl #3)
354392 unhandled amd64-solaris syscall: 171
354797 Vbit test does not include Iops for Power 8 instruction support
354883 tst->os_state.pthread - magic_delta assertion failure on OSX 10.11
== 361351
== 362920
== 366222
354933 Fix documentation of --kernel-variant=android-no-hw-tls option
355188 valgrind should intercept all malloc related global functions
355454 do not intercept malloc related symbols from the runtime linker
355455 stderr.exp of test cases wrapmalloc and wrapmallocstatic overconstrained
356044 Dwarf line info reader misinterprets is_stmt register
356112 mips: replace addi with addiu
356393 valgrind (vex) crashes because isZeroU happened
== 363497
== 364497
356676 arm64-linux: unhandled syscalls 125, 126 (sched_get_priority_max/min)
356678 arm64-linux: unhandled syscall 232 (mincore)
356817 valgrind.h triggers compiler errors on MSVC when defining NVALGRIND
356823 Unsupported ARM instruction: stlex
357059 x86/amd64: SSE cvtpi2ps with memory source does transition to MMX state
357338 Unhandled instruction for SHA instructions libcrypto Boring SSL
357673 crash if I try to run valgrind with a binary link with libcurl
357833 Setting RLIMIT_DATA to zero breaks with linux 4.5+
357871 pthread_spin_destroy not properly wrapped
357887 Calls to VG_(fclose) do not close the file descriptor
357932 amd64->IR: accept redundant REX prefixes for {minsd,maxsd} m128, xmm.
358030 support direct socket calls on x86 32bit (new in linux 4.3)
358478 drd/tests/std_thread.cpp doesn't build with GCC6
359133 Assertion 'eltSzB <= ddpa->poolSzB' failed
359181 Buffer Overflow during Demangling
359201 futex syscall "skips" argument 5 if op is FUTEX_WAIT_BITSET
359289 s390x: popcnt (B9E1) not implemented
359472 The Power PC vsubuqm instruction doesn't always give the correct result
359503 Add missing syscalls for aarch64 (arm64)
359645 "You need libc6-dbg" help message could be more helpful
359703 s390: wire up separate socketcalls system calls
359724 getsockname might crash - deref_UInt should call safe_to_deref
359733 amd64 implement ld.so strchr/index override like x86
359767 Valgrind does not support the IBM POWER ISA 3.0 instructions, part 1/5
359829 Power PC test suite none/tests/ppc64/test_isa_2_07.c uses
uninitialized data
359838 arm64: Unhandled instruction 0xD5033F5F (clrex)
359871 Incorrect mask handling in ppoll
359952 Unrecognised PCMPESTRM variants (0x70, 0x19)
360008 Contents of Power vr registers contents is not printed correctly when
the --vgdb-shadow-registers=yes option is used
360035 POWER PC instruction bcdadd and bcdsubtract generate result with
non-zero shadow bits
360378 arm64: Unhandled instruction 0x5E280844 (sha1h s4, s2)
360425 arm64 unsupported instruction ldpsw
== 364435
360519 none/tests/arm64/memory.vgtest might fail with newer gcc
360571 Error about the Android Runtime reading below the stack pointer on ARM
360574 Wrong parameter type for an ashmem ioctl() call on Android and ARM64
360749 kludge for multiple .rodata sections on Solaris no longer needed
360752 raise the number of reserved fds in m_main.c from 10 to 12
361207 Valgrind does not support the IBM POWER ISA 3.0 instructions, part 2/5
361226 s390x: risbgn (EC59) not implemented
361253 [s390x] ex_clone.c:42: undefined reference to `pthread_create'
361354 ppc64[le]: wire up separate socketcalls system calls
361615 Inconsistent termination for multithreaded process terminated by signal
361926 Unhandled Solaris syscall: sysfs(84)
362009 V dumps core on unimplemented functionality before threads are created
362329 Valgrind does not support the IBM POWER ISA 3.0 instructions, part 3/5
362894 missing (broken) support for wbit field on mtfsfi instruction (ppc64)
362935 [AsusWRT] Assertion 'sizeof(TTEntryC) <= 88' failed
362953 Request for an update to the Valgrind Developers page
363680 add renameat2() support
363705 arm64 missing syscall name_to_handle_at and open_by_handle_at
363714 ppc64 missing syscalls sync, waitid and name_to/open_by_handle_at
363858 Valgrind does not support the IBM POWER ISA 3.0 instructions, part 4/5
364058 clarify in manual limitations of array overruns detections
364413 pselect sycallwrapper mishandles NULL sigmask
364728 Power PC, missing support for several HW registers in
get_otrack_shadow_offset_wrk()
364948 Valgrind does not support the IBM POWER ISA 3.0 instructions, part 5/5
365273 Invalid write to stack location reported after signal handler runs
365912 ppc64BE segfault during jm-insns test (RELRO)
366079 FPXX Support for MIPS32 Valgrind
366138 Fix configure errors out when using Xcode 8 (clang 8.0.0)
366344 Multiple unhandled instruction for Aarch64
(0x0EE0E020, 0x1AC15800, 0x4E284801, 0x5E040023, 0x5E056060)
367995 Integration of memcheck with custom memory allocator
368120 x86_linux asm _start functions do not keep 16-byte aligned stack pointer
368412 False positive result for altivec capability check
368416 Add tc06_two_races_xml.exp output for ppc64
368419 Perf Events ioctls not implemented
368461 mmapunmap test fails on ppc64
368823 run_a_thread_NORETURN assembly code typo for VGP_arm64_linux target
369000 AMD64 fma4 instructions unsupported.
369169 ppc64 fails jm_int_isa_2_07 test
369175 jm_vec_isa_2_07 test crashes on ppc64
369209 valgrind loops and eats up all memory if cwd doesn't exist.
369356 pre_mem_read_sockaddr syscall wrapper can crash with bad sockaddr
369359 msghdr_foreachfield can crash when handling bad iovec
369360 Bad sigprocmask old or new sets can crash valgrind
369361 vmsplice syscall wrapper crashes on bad iovec
369362 Bad sigaction arguments crash valgrind
369383 x86 sys_modify_ldt wrapper crashes on bad ptr
369402 Bad set/get_thread_area pointer crashes valgrind
369441 bad lvec argument crashes process_vm_readv/writev syscall wrappers
369446 valgrind crashes on unknown fcntl command
369439 S390x: Unhandled insns RISBLG/RISBHG and LDE/LDER
369468 Remove quadratic metapool algorithm using VG_(HT_remove_at_Iter)
370265 ISA 3.0 HW cap stuff needs updating
371128 BCD add and subtract instructions on Power BE in 32-bit mode do not work
372195 Power PC, xxsel instruction is not always recognized
n-i-bz Fix incorrect (or infinite loop) unwind on RHEL7 x86 and amd64
n-i-bz massif --pages-as-heap=yes does not report peak caused by mmap+munmap
n-i-bz false positive leaks due to aspacemgr merging heap & non heap segments
n-i-bz Fix ppoll_alarm exclusion on OS X
n-i-bz Document brk segment limitation, reference manual in limit reached msg.
n-i-bz Fix clobber list in none/tests/amd64/xacq_xrel.c [valgrind r15737]
n-i-bz Bump allowed shift value for "add.w reg, sp, reg, lsl #N" [vex r3206]
n-i-bz amd64: memcheck false positive with shr %edx
n-i-bz arm3: Allow early writeback of SP base register in "strd rD, [sp, #-16]"
n-i-bz ppc: Fix two cases of PPCAvFpOp vs PPCFpOp enum confusion
n-i-bz arm: Fix incorrect register-number constraint check for LDAEX{,B,H,D}
n-i-bz DHAT: added collection of the metric "tot-blocks-allocd"
(3.12.0.RC1: 20 October 2016, vex r3282, valgrind r16094)
(3.12.0.RC2: 20 October 2016, vex r3282, valgrind r16096)
(3.12.0: 21 October 2016, vex r3282, valgrind r16098)
Release 3.11.0 (22 September 2015)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.11.0 is a feature release with many improvements and the usual
collection of bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM32/Linux,
ARM64/Linux, PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux,
MIPS32/Linux, MIPS64/Linux, ARM/Android, ARM64/Android,
MIPS32/Android, X86/Android, X86/Solaris, AMD64/Solaris, X86/MacOSX
10.10 and AMD64/MacOSX 10.10. There is also preliminary support for
X86/MacOSX 10.11, AMD64/MacOSX 10.11 and TILEGX/Linux.
* ================== PLATFORM CHANGES =================
* Support for Solaris/x86 and Solaris/amd64 has been added.
* Preliminary support for Mac OS X 10.11 (El Capitan) has been added.
* Preliminary support for the Tilera TileGX architecture has been added.
* s390x: It is now required for the host to have the "long displacement"
facility. The oldest supported machine model is z990.
* x86: on an SSE2 only host, Valgrind in 32 bit mode now claims to be a
Pentium 4. 3.10.1 wrongly claimed to be a Core 2, which is SSSE3.
* The JIT's register allocator is significantly faster, making the JIT
as a whole somewhat faster, so JIT-intensive activities, for example
program startup, are modestly faster, around 5%.
* There have been changes to the default settings of several command
line flags, as detailed below.
* Intel AVX2 support is more complete (64 bit targets only). On AVX2
capable hosts, the simulated CPUID will now indicate AVX2 support.
* ==================== TOOL CHANGES ====================
* Memcheck:
- The default value for --leak-check-heuristics has been changed from
"none" to "all". This helps to reduce the number of possibly
lost blocks, in particular for C++ applications.
- The default value for --keep-stacktraces has been changed from
"malloc-then-free" to "malloc-and-free". This has a small cost in
memory (one word per malloc-ed block) but allows Memcheck to show the
3 stacktraces of a dangling reference: where the block was allocated,
where it was freed, and where it is acccessed after being freed.
- The default value for --partial-loads-ok has been changed from "no" to
"yes", so as to avoid false positive errors resulting from some kinds
of vectorised loops.
- A new monitor command 'xb <addr> <len>' shows the validity bits of
<len> bytes at <addr>. The monitor command 'xb' is easier to use
than get_vbits when you need to associate byte data value with
their corresponding validity bits.
- The 'block_list' monitor command has been enhanced:
o it can print a range of loss records
o it now accepts an optional argument 'limited <max_blocks>'
to control the number of blocks printed.
o if a block has been found using a heuristic, then
'block_list' now shows the heuristic after the block size.
o the loss records/blocks to print can be limited to the blocks
found via specified heuristics.
- The C helper functions used to instrument loads on
x86-{linux,solaris} and arm-linux (both 32-bit only) have been
replaced by handwritten assembly sequences. This gives speedups
in the region of 0% to 7% for those targets only.
- A new command line option, --expensive-definedness-checks=yes|no,
has been added. This is useful for avoiding occasional invalid
uninitialised-value errors in optimised code. Watch out for
runtime degradation, as this can be up to 25%. As always, though,
the slowdown is highly application specific. The default setting
is "no".
* Massif:
- A new monitor command 'all_snapshots <filename>' dumps all
snapshots taken so far.
* Helgrind:
- Significant memory reduction and moderate speedups for
--history-level=full for applications accessing a lot of memory
with many different stacktraces.
- The default value for --conflict-cache-size=N has been doubled to
2000000. Users that were not using the default value should
preferably also double the value they give.
The default was changed due to the changes in the "full history"
implementation. Doubling the value gives on average a slightly more
complete history and uses similar memory (or significantly less memory
in the worst case) than the previous implementation.
- The Helgrind monitor command 'info locks' now accepts an optional
argument 'lock_addr', which shows information about the lock at the
given address only.
- When using --history-level=full, the new Helgrind monitor command
'accesshistory <addr> [<len>]' will show the recorded accesses for
<len> (or 1) bytes at <addr>.
* ==================== OTHER CHANGES ====================
* The default value for the --smc-check option has been changed from
"stack" to "all-non-file" on targets that provide automatic D-I
cache coherence (x86, amd64 and s390x). The result is to provide,
by default, transparent support for JIT generated and self-modifying
code on all targets.
* Mac OS X only: the default value for the --dsymutil option has been
changed from "no" to "yes", since any serious usage on Mac OS X
always required it to be "yes".
* The command line options --db-attach and --db-command have been removed.
They were deprecated in 3.10.0.
* When a process dies due to a signal, Valgrind now shows the signal
and the stacktrace at default verbosity (i.e. verbosity 1).
* The address description logic used by Memcheck and Helgrind now
describes addresses in anonymous segments, file mmap-ed segments,
shared memory segments and the brk data segment.
* The new option --error-markers=<begin>,<end> can be used to mark the
begin/end of errors in textual output mode, to facilitate
searching/extracting errors in output files that mix valgrind errors
with program output.
* The new option --max-threads=<number> can be used to change the number
of threads valgrind can handle. The default is 500 threads which
should be more than enough for most applications.
* The new option --valgrind-stacksize=<number> can be used to change the
size of the private thread stacks used by Valgrind. This is useful
for reducing memory use or increasing the stack size if Valgrind
segfaults due to stack overflow.
* The new option --avg-transtab-entry-size=<number> can be used to specify
the expected instrumented block size, either to reduce memory use or
to avoid excessive retranslation.
* Valgrind can be built with Intel's ICC compiler, version 14.0 or later.
* New and modified GDB server monitor features:
- When a signal is reported in GDB, you can now use the GDB convenience
variable $_siginfo to examine detailed signal information.
- Valgrind's gdbserver now allows the user to change the signal
to deliver to the process. So, use 'signal SIGNAL' to continue execution
with SIGNAL instead of the signal reported to GDB. Use 'signal 0' to
continue without passing the signal to the process.
- With GDB >= 7.10, the command 'target remote'
will automatically load the executable file of the process running
under Valgrind. This means you do not need to specify the executable
file yourself, GDB will discover it itself. See GDB documentation about
'qXfer:exec-file:read' packet for more info.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
116002 VG_(printf): Problems with justification of strings and integers
155125 avoid cutting away file:lineno after long function name
197259 Unsupported arch_prtctl PR_SET_GS option
201152 ppc64: Assertion in ppc32g_dirtyhelper_MFSPR_268_269
201216 Fix Valgrind does not support pthread_sigmask() on OS X
201435 Fix Darwin: -v does not show kernel version
208217 "Warning: noted but unhandled ioctl 0x2000747b" on Mac OS X
211256 Fixed an outdated comment regarding the default platform.
211529 Incomplete call stacks for code compiled by newer versions of MSVC
211926 Avoid compilation warnings in valgrind.h with -pedantic
212291 Fix unhandled syscall: unix:132 (mkfifo) on OS X
== 263119
226609 Crediting upstream authors in man page
231257 Valgrind omits path when executing script from shebang line
254164 OS X task_info: UNKNOWN task message [id 3405, to mach_task_self() [..]
294065 Improve the pdb file reader by avoiding hardwired absolute pathnames
269360 s390x: Fix addressing mode selection for compare-and-swap
302630 Memcheck: Assertion failed: 'sizeof(UWord) == sizeof(UInt)'
== 326797
312989 ioctl handling needs to do POST handling on generic ioctls and [..]
319274 Fix unhandled syscall: unix:410 (sigsuspend_nocancel) on OS X
324181 mmap does not handle MAP_32BIT (handle it now, rather than fail it)
327745 Fix valgrind 3.9.0 build fails on Mac OS X 10.6.8
330147 libmpiwrap PMPI_Get_count returns undefined value
333051 mmap of huge pages fails due to incorrect alignment
== 339163
334802 valgrind does not always explain why a given option is bad
335618 mov.w rN, pc/sp (ARM32)
335785 amd64->IR 0xC4 0xE2 0x75 0x2F (vmaskmovpd)
== 307399
== 343175
== 342740
== 346912
335907 segfault when running wine's ddrawex/tests/surface.c under valgrind
338602 AVX2 bit in CPUID missing
338606 Strange message for scripts with invalid interpreter
338731 ppc: Fix testuite build for toolchains not supporting -maltivec
338995 shmat with hugepages (SHM_HUGETLB) fails with EINVAL
339045 Getting valgrind to compile and run on OS X Yosemite (10.10)
== 340252
339156 gdbsrv not called for fatal signal
339215 Valgrind 3.10.0 contain 2013 in copyrights notice
339288 support Cavium Octeon MIPS specific BBIT*32 instructions
339636 Use fxsave64 and fxrstor64 mnemonics instead of old-school rex64 prefix
339442 Fix testsuite build failure on OS X 10.9
339542 Enable compilation with Intel's ICC compiler
339563 The DVB demux DMX_STOP ioctl doesn't have a wrapper
339688 Mac-specific ASM does not support .version directive (cpuid,
tronical and pushfpopf tests)
339745 Valgrind crash when check Marmalade app (partial fix)
339755 Fix known deliberate memory leak in setenv() on Mac OS X 10.9
339778 Linux/TileGx platform support for Valgrind
339780 Fix known uninitialised read in pthread_rwlock_init() on Mac OS X 10.9
339789 Fix none/tests/execve test on Mac OS X 10.9
339808 Fix none/tests/rlimit64_nofile test on Mac OS X 10.9
339820 vex amd64->IR: 0x66 0xF 0x3A 0x63 0xA 0x42 0x74 0x9 (pcmpistri $0x42)
340115 Fix none/tests/cmdline[1|2] tests on systems which define TMPDIR
340392 Allow user to select more accurate definedness checking in memcheck
to avoid invalid complaints on optimised code
340430 Fix some grammatical weirdness in the manual.
341238 Recognize GCC5/DWARFv5 DW_LANG constants (Go, C11, C++11, C++14)
341419 Signal handler ucontext_t not filled out correctly on OS X
341539 VG_(describe_addr) should not describe address as belonging to client
segment if it is past the heap end
341613 Enable building of manythreads and thread-exits tests on Mac OS X
341615 Fix none/tests/darwin/access_extended test on Mac OS X
341698 Valgrind's AESKEYGENASSIST gives wrong result in words 0 and 2 [..]
341789 aarch64: shmat fails with valgrind on ARMv8
341997 MIPS64: Cavium OCTEON insns - immediate operand handled incorrectly
342008 valgrind.h needs type cast [..] for clang/llvm in 64-bit mode
342038 Unhandled syscalls on aarch64 (mbind/get/set_mempolicy)
342063 wrong format specifier for test mcblocklistsearch in gdbserver_tests
342117 Hang when loading PDB file for MSVC compiled Firefox under Wine
342221 socket connect false positive uninit memory for unknown af family
342353 Allow dumping full massif output while valgrind is still running
342571 Valgrind chokes on AVX compare intrinsic with _CMP_GE_QS
== 346476
== 348387
== 350593
342603 Add I2C_SMBUS ioctl support
342635 OS X 10.10 (Yosemite) - missing system calls and fcntl code
342683 Mark memory past the initial brk limit as unaddressable
342783 arm: unhandled instruction 0xEEFE1ACA = "vcvt.s32.f32 s3, s3, #12"
342795 Internal glibc __GI_mempcpy call should be intercepted
342841 s390x: Support instructions fiebr(a) and fidbr(a)
343012 Unhandled syscall 319 (memfd_create)
343069 Patch updating v4l2 API support
343173 helgrind crash during stack unwind
343219 fix GET_STARTREGS for arm
343303 Fix known deliberate memory leak in setenv() on Mac OS X 10.10
343306 OS X 10.10: UNKNOWN mach_msg unhandled MACH_SEND_TRAILER option
343332 Unhandled instruction 0x9E310021 (fcvtmu) on aarch64
343335 unhandled instruction 0x1E638400 (fccmp) aarch64
343523 OS X mach_ports_register: UNKNOWN task message [id 3403, to [..]
343525 OS X host_get_special_port: UNKNOWN host message [id 412, to [..]
343597 ppc64le: incorrect use of offseof macro
343649 OS X host_create_mach_voucher: UNKNOWN host message [id 222, to [..]
343663 OS X 10.10 Memchecj always reports a leak regardless of [..]
343732 Unhandled syscall 144 (setgid) on aarch64
343733 Unhandled syscall 187 (msgctl and related) on aarch64
343802 s390x: False positive "conditional jump or move depends on [..]
343902 --vgdb=yes doesn't break when --xml=yes is used
343967 Don't warn about setuid/setgid/setcap executable for directories
343978 Recognize DWARF5/GCC5 DW_LANG_Fortran 2003 and 2008 constants
344007 accept4 syscall unhandled on arm64 (242) and ppc64 (344)
344033 Helgrind on ARM32 loses track of mutex state in pthread_cond_wait
344054 www - update info for Solaris/illumos
344416 'make regtest' does not work cleanly on OS X
344235 Remove duplicate include of pub_core_aspacemgr.h
344279 syscall sendmmsg on arm64 (269) and ppc32/64 (349) unhandled
344295 syscall recvmmsg on arm64 (243) and ppc32/64 (343) unhandled
344307 2 unhandled syscalls on aarch64/arm64: umount2(39), mount (40)
344314 callgrind_annotate ... warnings about commands containing newlines
344318 socketcall should wrap recvmmsg and sendmmsg
344337 Fix unhandled syscall: mach:41 (_kernelrpc_mach_port_guard_trap)
344416 Fix 'make regtest' does not work cleanly on OS X
344499 Fix compilation for Linux kernel >= 4.0.0
344512 OS X: unhandled syscall: unix:348 (__pthread_chdir),
unix:349 (__pthread_fchdir)
344559 Garbage collection of unused segment names in address space manager
344560 Fix stack traces missing penultimate frame on OS X
344621 Fix memcheck/tests/err_disable4 test on OS X
344686 Fix suppression for pthread_rwlock_init on OS X 10.10
344702 Fix missing libobjc suppressions on OS X 10.10
== 344543
344936 Fix unhandled syscall: unix:473 (readlinkat) on OS X 10.10
344939 Fix memcheck/tests/xml1 on OS X 10.10
345016 helgrind/tests/locked_vs_unlocked2 is failing sometimes
345079 Fix build problems in VEX/useful/test_main.c
345126 Incorrect handling of VIDIOC_G_AUDIO and G_AUDOUT
345177 arm64: prfm (reg) not implemented
345215 Performance improvements for the register allocator
345248 add support for Solaris OS in valgrind
345338 TIOCGSERIAL and TIOCSSERIAL ioctl support on Linux
345394 Fix memcheck/tests/strchr on OS X
345637 Fix memcheck/tests/sendmsg on OS X
345695 Add POWERPC support for AT_DCACHESIZE and HWCAP2
345824 Fix aspacem segment mismatch: seen with none/tests/bigcode
345887 Fix an assertion in the address space manager
345928 amd64: callstack only contains current function for small stacks
345984 disInstr(arm): unhandled instruction: 0xEE193F1E
345987 MIPS64: Implement cavium LHX instruction
346031 MIPS: Implement support for the CvmCount register (rhwr %0, 31)
346185 Fix typo saving altivec register v24
346267 Compiler warnings for PPC64 code on call to LibVEX_GuestPPC64_get_XER()
and LibVEX_GuestPPC64_get_CR()
346270 Regression tests none/tests/jm_vec/isa_2_07 and
none/tests/test_isa_2_07_part2 have failures on PPC64 little endian
346307 fuse filesystem syscall deadlocks
346324 PPC64 missing support for lbarx, lharx, stbcx and sthcx instructions
346411 MIPS: SysRes::_valEx handling is incorrect
346416 Add support for LL_IOC_PATH2FID and LL_IOC_GETPARENT Lustre ioctls
346474 PPC64 Power 8, spr TEXASRU register not supported
346487 Compiler generates "note" about a future ABI change for PPC64
346562 MIPS64: lwl/lwr instructions are performing 64bit loads
and causing spurious "invalid read of size 8" warnings
346801 Fix link error on OS X: _vgModuleLocal_sf_maybe_extend_stack
347151 Fix suppression for pthread_rwlock_init on OS X 10.8
347233 Fix memcheck/tests/strchr on OS X 10.10 (Haswell)
347322 Power PC regression test cleanup
347379 valgrind --leak-check=full leak errors from system libs on OS X 10.8
== 217236
347389 unhandled syscall: 373 (Linux ARM syncfs)
347686 Patch set to cleanup PPC64 regtests
347978 Remove bash dependencies where not needed
347982 OS X: undefined symbols for architecture x86_64: "_global" [..]
347988 Memcheck: the 'impossible' happened: unexpected size for Addr (OSX/wine)
== 345929
348102 Patch updating v4l2 API support
348247 amd64 front end: jno jumps wrongly when overflow is not set
348269 Improve mmap MAP_HUGETLB support.
348334 (ppc) valgrind does not simulate dcbfl - then my program terminates
348345 Assertion fails for negative lineno
348377 Unsupported ARM instruction: yield
348565 Fix detection of command line option availability for clang
348574 vex amd64->IR pcmpistri SSE4.2 unsupported (pcmpistri $0x18)
348728 Fix broken check for VIDIOC_G_ENC_INDEX
348748 Fix redundant condition
348890 Fix clang warning about unsupported --param inline-unit-growth=900
348949 Bogus "ERROR: --ignore-ranges: suspiciously large range"
349034 Add Lustre ioctls LL_IOC_GROUP_LOCK and LL_IOC_GROUP_UNLOCK
349086 Fix UNKNOWN task message [id 3406, to mach_task_self(), [..]
349087 Fix UNKNOWN task message [id 3410, to mach_task_self(), [..]
349626 Implemented additional Xen hypercalls
349769 Clang/osx: ld: warning: -read_only_relocs cannot be used with x86_64
349790 Clean up of the hardware capability checking utilities.
349828 memcpy intercepts memmove causing src/dst overlap error (ppc64 ld.so)
349874 Fix typos in source code
349879 memcheck: add handwritten assembly for helperc_LOADV*
349941 di_notify_mmap might create wrong start/size DebugInfoMapping
350062 vex x86->IR: 0x66 0xF 0x3A 0xB (ROUNDSD) on OS X
350202 Add limited param to 'monitor block_list'
350290 s390x: Support instructions fixbr(a)
350359 memcheck/tests/x86/fxsave hangs indefinetely on OS X
350809 Fix none/tests/async-sigs for Solaris
350811 Remove reference to --db-attach which has been removed.
350813 Memcheck/x86: enable handwritten assembly helpers for x86/Solaris too
350854 hard-to-understand code in VG_(load_ELF)()
351140 arm64 syscalls setuid (146) and setresgid (149) not implemented
351386 Solaris: Cannot run ld.so.1 under Valgrind
351474 Fix VG_(iseqsigset) as obvious
351531 Typo in /include/vki/vki-xen-physdev.h header guard
351756 Intercept platform_memchr$VARIANT$Haswell on OS X
351858 ldsoexec support on Solaris
351873 Newer gcc doesn't allow __builtin_tabortdc[i] in ppc32 mode
352130 helgrind reports false races for printfs using mempcpy on FILE* state
352284 s390: Conditional jump depends on uninitialised value(s) in vfprintf
352320 arm64 crash on none/tests/nestedfs
352765 Vbit test fails on Power 6
352768 The mbar instruction is missing from the Power PC support
352769 Power PC program priority register (PPR) is not supported
n-i-bz Provide implementations of certain compiler builtins to support
compilers that may not provide those
n-i-bz Old STABS code is still being compiled, but never used. Remove it.
n-i-bz Fix compilation on distros with glibc < 2.5
n-i-bz (vex 3098) Avoid generation of Neon insns on non-Neon hosts
n-i-bz Enable rt_sigpending syscall on ppc64 linux.
n-i-bz mremap did not work properly on shared memory
n-i-bz Fix incorrect sizeof expression in syswrap-xen.c reported by Coverity
n-i-bz In VALGRIND_PRINTF write out thread name, if any, to xml
(3.11.0.TEST1: 8 September 2015, vex r3187, valgrind r15646)
(3.11.0.TEST2: 21 September 2015, vex r3193, valgrind r15667)
(3.11.0: 22 September 2015, vex r3195, valgrind r15674)
Release 3.10.1 (25 November 2014)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.10.1 is a bug fix release. It fixes various bugs reported in 3.10.0
and backports fixes for all reported missing AArch64 ARMv8 instructions
and syscalls from the trunk. If you package or deliver 3.10.0 for others
to use, you might want to consider upgrading to 3.10.1 instead.
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
335440 arm64: ld1 (single structure) is not implemented
335713 arm64: unhanded instruction: prfm (immediate)
339020 ppc64: memcheck/tests/ppc64/power_ISA2_05 failing in nightly build
339182 ppc64: AvSplat ought to load destination vector register with [..]
339336 PPC64 store quad instruction (stq) is not supposed to change [..]
339433 ppc64 lxvw4x instruction uses four 32-byte loads
339645 Use correct tag names in sys_getdents/64 wrappers
339706 Fix false positive for ioctl(TIOCSIG) on linux
339721 assertion 'check_sibling == sibling' failed in readdwarf3.c ...
339853 arm64 times syscall unknown
339855 arm64 unhandled getsid/setsid syscalls
339858 arm64 dmb sy not implemented
339926 Unhandled instruction 0x1E674001 (frintx) on aarm64
339927 Unhandled instruction 0x9E7100C6 (fcvtmu) on aarch64
339938 disInstr(arm64): unhandled instruction 0x4F8010A4 (fmla)
== 339950
339940 arm64: unhandled syscall: 83 (sys_fdatasync) + patch
340033 arm64: unhandled insn dmb ishld and some other isb-dmb-dsb variants
340028 unhandled syscalls for arm64 (msync, pread64, setreuid and setregid)
340036 arm64: Unhandled instruction ld4 (multiple structures, no offset)
340236 arm64: unhandled syscalls: mknodat, fchdir, chroot, fchownat
340509 arm64: unhandled instruction fcvtas
340630 arm64: fchmod (52) and fchown (55) syscalls not recognized
340632 arm64: unhandled instruction fcvtas
340722 Resolve "UNKNOWN attrlist flags 0:0x10000000"
340725 AVX2: Incorrect decoding of vpbroadcast{b,w} reg,reg forms
340788 warning: unhandled syscall: 318 (getrandom)
340807 disInstr(arm): unhandled instruction: 0xEE989B20
340856 disInstr(arm64): unhandled instruction 0x1E634C45 (fcsel)
340922 arm64: unhandled getgroups/setgroups syscalls
350251 Fix typo in VEX utility program (test_main.c).
350407 arm64: unhandled instruction ucvtf (vector, integer)
350809 none/tests/async-sigs breaks when run under cron on Solaris
350811 update README.solaris after r15445
350813 Use handwritten memcheck assembly helpers on x86/Solaris [..]
350854 strange code in VG_(load_ELF)()
351140 arm64 syscalls setuid (146) and setresgid (149) not implemented
n-i-bz DRD and Helgrind: Handle Imbe_CancelReservation (clrex on ARM)
n-i-bz Add missing ]] to terminate CDATA.
n-i-bz Glibc versions prior to 2.5 do not define PTRACE_GETSIGINFO
n-i-bz Enable sys_fadvise64_64 on arm32.
n-i-bz Add test cases for all remaining AArch64 SIMD, FP and memory insns.
n-i-bz Add test cases for all known arm64 load/store instructions.
n-i-bz PRE(sys_openat): when checking whether ARG1 == VKI_AT_FDCWD [..]
n-i-bz Add detection of old ppc32 magic instructions from bug 278808.
n-i-bz exp-dhat: Implement missing function "dh_malloc_usable_size".
n-i-bz arm64: Implement "fcvtpu w, s".
n-i-bz arm64: implement ADDP and various others
n-i-bz arm64: Implement {S,U}CVTF (scalar, fixedpt).
n-i-bz arm64: enable FCVT{A,N}S X,S.
(3.10.1: 25 November 2014, vex r3026, valgrind r14785)
Release 3.10.0 (10 September 2014)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.10.0 is a feature release with many improvements and the usual
collection of bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, MIPS32/Android, X86/Android, X86/MacOSX 10.9
and AMD64/MacOSX 10.9. Support for MacOSX 10.8 and 10.9 is
significantly improved relative to the 3.9.0 release.
* ================== PLATFORM CHANGES =================
* Support for the 64-bit ARM Architecture (AArch64 ARMv8). This port
is mostly complete, and is usable, but some SIMD instructions are as
yet unsupported.
* Support for little-endian variant of the 64-bit POWER architecture.
* Support for Android on MIPS32.
* Support for 64bit FPU on MIPS32 platforms.
* Both 32- and 64-bit executables are supported on MacOSX 10.8 and 10.9.
* Configuration for and running on Android targets has changed.
See README.android in the source tree for details.
* ================== DEPRECATED FEATURES =================
* --db-attach is now deprecated and will be removed in the next
valgrind feature release. The built-in GDB server capabilities are
superior and should be used instead. Learn more here:
http://valgrind.org/docs/manual/manual-core-adv.html#manual-core-adv.gdbserver
* ==================== TOOL CHANGES ====================
* Memcheck:
- Client code can now selectively disable and re-enable reporting of
invalid address errors in specific ranges using the new client
requests VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE and
VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE.
- Leak checker: there is a new leak check heuristic called
"length64". This is used to detect interior pointers pointing 8
bytes inside a block, on the assumption that the first 8 bytes
holds the value "block size - 8". This is used by
sqlite3MemMalloc, for example.
- Checking of system call parameters: if a syscall parameter
(e.g. bind struct sockaddr, sendmsg struct msghdr, ...) has
several fields not initialised, an error is now reported for each
field. Previously, an error was reported only for the first
uninitialised field.
- Mismatched alloc/free checking: a new flag
--show-mismatched-frees=no|yes [yes] makes it possible to turn off
such checks if necessary.
* Helgrind:
- Improvements to error messages:
o Race condition error message involving heap allocated blocks also
show the thread number that allocated the raced-on block.
o All locks referenced by an error message are now announced.
Previously, some error messages only showed the lock addresses.
o The message indicating where a lock was first observed now also
describes the address/location of the lock.
- Helgrind now understands the Ada task termination rules and
creates a happens-before relationship between a terminated task
and its master. This avoids some false positives and avoids a big
memory leak when a lot of Ada tasks are created and terminated.
The interceptions are only activated with forthcoming releases of
gnatpro >= 7.3.0w-20140611 and gcc >= 5.0.
- A new GDB server monitor command "info locks" giving the list of
locks, their location, and their status.
* Callgrind:
- callgrind_control now supports the --vgdb-prefix argument,
which is needed if valgrind was started with this same argument.
* ==================== OTHER CHANGES ====================
* Unwinding through inlined function calls. Stack unwinding can now
make use of Dwarf3 inlined-unwind information if it is available.
The practical effect is that inlined calls become visible in stack
traces. The suppression matching machinery has been adjusted
accordingly. This is controlled by the new option
--read-inline-info=yes|no. Currently this is enabled by default
only on Linux and Android targets and only for the tools Memcheck,
Helgrind and DRD.
* Valgrind can now read EXIDX unwind information on 32-bit ARM
targets. If an object contains both CFI and EXIDX unwind
information, Valgrind will prefer the CFI over the EXIDX. This
facilitates unwinding through system libraries on arm-android
targets.
* Address description logic has been improved and is now common
between Memcheck and Helgrind, resulting in better address
descriptions for some kinds of error messages.
* Error messages about dubious arguments (eg, to malloc or calloc) are
output like other errors. This means that they can be suppressed
and they have a stack trace.
* The C++ demangler has been updated for better C++11 support.
* New and modified GDB server monitor features:
- Thread local variables/storage (__thread) can now be displayed.
- The GDB server monitor command "v.info location <address>"
displays information about an address. The information produced
depends on the tool and on the options given to valgrind.
Possibly, the following are described: global variables, local
(stack) variables, allocated or freed blocks, ...
- The option "--vgdb-stop-at=event1,event2,..." allows the user to
ask the GDB server to stop at the start of program execution, at
the end of the program execution and on Valgrind internal errors.
- A new monitor command "v.info stats" shows various Valgrind core
and tool statistics.
- A new monitor command "v.set hostvisibility" allows the GDB server
to provide access to Valgrind internal host status/memory.
* A new option "--aspace-minaddr=<address>" can in some situations
allow the use of more memory by decreasing the address above which
Valgrind maps memory. It can also be used to solve address
conflicts with system libraries by increasing the default value.
See user manual for details.
* The amount of memory used by Valgrind to store debug info (unwind
info, line number information and symbol data) has been
significantly reduced, even though Valgrind now reads more
information in order to support unwinding of inlined function calls.
* Dwarf3 handling with --read-var-info=yes has been improved:
- Ada and C struct containing VLAs no longer cause a "bad DIE" error
- Code compiled with
-ffunction-sections -fdata-sections -Wl,--gc-sections
no longer causes assertion failures.
* Improved checking for the --sim-hints= and --kernel-variant=
options. Unknown strings are now detected and reported to the user
as a usage error.
* The semantics of stack start/end boundaries in the valgrind.h
VALGRIND_STACK_REGISTER client request has been clarified and
documented. The convention is that start and end are respectively
the lowest and highest addressable bytes of the stack.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
175819 Support for ipv6 socket reporting with --track-fds
232510 make distcheck fails
249435 Analyzing wine programs with callgrind triggers a crash
278972 support for inlined function calls in stacktraces and suppression
== 199144
291310 FXSAVE instruction marks memory as undefined on amd64
303536 ioctl for SIOCETHTOOL (ethtool(8)) isn't wrapped
308729 vex x86->IR: unhandled instruction bytes 0xf 0x5 (syscall)
315199 vgcore file for threaded app does not show which thread crashed
315952 tun/tap ioctls are not supported
323178 Unhandled instruction: PLDW register (ARM)
323179 Unhandled instruction: PLDW immediate (ARM)
324050 Helgrind: SEGV because of unaligned stack when using movdqa
325110 Add test-cases for Power ISA 2.06 insns: divdo/divdo. and divduo/divduo.
325124 [MIPSEL] Compilation error
325477 Phase 4 support for IBM Power ISA 2.07
325538 cavium octeon mips64, valgrind reported "dumping core" [...]
325628 Phase 5 support for IBM Power ISA 2.07
325714 Empty vgcore but RLIMIT_CORE is big enough (too big)
325751 Missing the two privileged Power PC Transactional Memory Instructions
325816 Phase 6 support for IBM Power ISA 2.07
325856 Make SGCheck fail gracefully on unsupported platforms
326026 Iop names for count leading zeros/sign bits incorrectly imply [..]
326436 DRD: False positive in libstdc++ std::list::push_back
326444 Cavium MIPS Octeon Specific Load Indexed Instructions
326462 Refactor vgdb to isolate invoker stuff into separate module
326469 amd64->IR: 0x66 0xF 0x3A 0x63 0xC1 0xE (pcmpistri 0x0E)
326623 DRD: false positive conflict report in a field assignment
326724 Valgrind does not compile on OSX 1.9 Mavericks
326816 Intercept for __strncpy_sse2_unaligned missing?
326921 coregrind fails to compile m_trampoline.S with MIPS/Linux port of V
326983 Clear direction flag after tests on amd64.
327212 Do not prepend the current directory to absolute path names.
327223 Support for Cavium MIPS Octeon Atomic and Count Instructions
327238 Callgrind Assertion 'passed <= last_bb->cjmp_count' failed
327284 s390x: Fix translation of the risbg instruction
327639 vex amd64->IR pcmpestri SSE4.2 instruction is unsupported 0x34
327837 dwz compressed alternate .debug_info and .debug_str not read correctly
327916 DW_TAG_typedef may have no name
327943 s390x: add a redirection for the 'index' function
328100 XABORT not implemented
328205 Implement additional Xen hypercalls
328454 add support Backtraces with ARM unwind tables (EXIDX)
328455 s390x: SIGILL after emitting wrong register pair for ldxbr
328711 valgrind.1 manpage "memcheck options" section is badly generated
328878 vex amd64->IR pcmpestri SSE4.2 instruction is unsupported 0x14
329612 Incorrect handling of AT_BASE for image execution
329694 clang warns about using uninitialized variable
329956 valgrind crashes when lmw/stmw instructions are used on ppc64
330228 mmap must align to VKI_SHMLBA on mips32
330257 LLVM does not support `-mno-dynamic-no-pic` option
330319 amd64->IR: unhandled instruction bytes: 0xF 0x1 0xD5 (xend)
330459 --track-fds=yes doesn't track eventfds
330469 Add clock_adjtime syscall support
330594 Missing sysalls on PowerPC / uClibc
330622 Add test to regression suite for POWER instruction: dcbzl
330939 Support for AMD's syscall instruction on x86
== 308729
330941 Typo in PRE(poll) syscall wrapper
331057 unhandled instruction: 0xEEE01B20 (vfma.f64) (has patch)
331254 Fix expected output for memcheck/tests/dw4
331255 Fix race condition in test none/tests/coolo_sigaction
331257 Fix type of jump buffer in test none/tests/faultstatus
331305 configure uses bash specific syntax
331337 s390x WARNING: unhandled syscall: 326 (dup3)
331380 Syscall param timer_create(evp) points to uninitialised byte(s)
331476 Patch to handle ioctl 0x5422 on Linux (x86 and amd64)
331829 Unexpected ioctl opcode sign extension
331830 ppc64: WARNING: unhandled syscall: 96/97
331839 drd/tests/sem_open specifies invalid semaphore name
331847 outcome of drd/tests/thread_name is nondeterministic
332037 Valgrind cannot handle Thumb "add pc, reg"
332055 drd asserts on platforms with VG_STACK_REDZONE_SZB == 0 and
consistency checks enabled
332263 intercepts for pthread_rwlock_timedrdlock and
pthread_rwlock_timedwrlock are incorrect
332265 drd could do with post-rwlock_init and pre-rwlock_destroy
client requests
332276 Implement additional Xen hypercalls
332658 ldrd.w r1, r2, [PC, #imm] does not adjust for 32bit alignment
332765 Fix ms_print to create temporary files in a proper directory
333072 drd: Add semaphore annotations
333145 Tests for missaligned PC+#imm access for arm
333228 AAarch64 Missing instruction encoding: mrs %[reg], ctr_el0
333230 AAarch64 missing instruction encodings: dc, ic, dsb.
333248 WARNING: unhandled syscall: unix:443
333428 ldr.w pc [rD, #imm] instruction leads to assertion
333501 cachegrind: assertion: Cache set count is not a power of two.
== 336577
== 292281
333666 Recognize MPX instructions and bnd prefix.
333788 Valgrind does not support the CDROM_DISC_STATUS ioctl (has patch)
333817 Valgrind reports the memory areas written to by the SG_IO
ioctl as untouched
334049 lzcnt fails silently (x86_32)
334384 Valgrind does not have support Little Endian support for
IBM POWER PPC 64
334585 recvmmsg unhandled (+patch) (arm)
334705 sendmsg and recvmsg should guard against bogus msghdr fields.
334727 Build fails with -Werror=format-security
334788 clarify doc about --log-file initial program directory
334834 PPC64 Little Endian support, patch 2
334836 PPC64 Little Endian support, patch 3 testcase fixes
334936 patch to fix false positives on alsa SNDRV_CTL_* ioctls
335034 Unhandled ioctl: HCIGETDEVLIST
335155 vgdb, fix error print statement.
335262 arm64: movi 8bit version is not supported
335263 arm64: dmb instruction is not implemented
335441 unhandled ioctl 0x8905 (SIOCATMARK) when running wine under valgrind
335496 arm64: sbc/abc instructions are not implemented
335554 arm64: unhandled instruction: abs
335564 arm64: unhandled instruction: fcvtpu Xn, Sn
335735 arm64: unhandled instruction: cnt
335736 arm64: unhandled instruction: uaddlv
335848 arm64: unhandled instruction: {s,u}cvtf
335902 arm64: unhandled instruction: sli
335903 arm64: unhandled instruction: umull (vector)
336055 arm64: unhandled instruction: mov (element)
336062 arm64: unhandled instruction: shrn{,2}
336139 mip64: [...] valgrind hangs and spins on a single core [...]
336189 arm64: unhandled Instruction: mvn
336435 Valgrind hangs in pthread_spin_lock consuming 100% CPU
336619 valgrind --read-var-info=yes doesn't handle DW_TAG_restrict_type
336772 Make moans about unknown ioctls more informative
336957 Add a section about the Solaris/illumos port on the webpage
337094 ifunc wrapper is broken on ppc64
337285 fcntl commands F_OFD_SETLK, F_OFD_SETLKW, and F_OFD_GETLK not supported
337528 leak check heuristic for block prefixed by length as 64bit number
337740 Implement additional Xen hypercalls
337762 guest_arm64_toIR.c:4166 (dis_ARM64_load_store): Assertion `0' failed.
337766 arm64-linux: unhandled syscalls mlock (228) and mlockall (230)
337871 deprecate --db-attach
338023 Add support for all V4L2/media ioctls
338024 inlined functions are not shown if DW_AT_ranges is used
338106 Add support for 'kcmp' syscall
338115 DRD: computed conflict set differs from actual after fork
338160 implement display of thread local storage in gdbsrv
338205 configure.ac and check for -Wno-tautological-compare
338300 coredumps are missing one byte of every segment
338445 amd64 vbit-test fails with unknown opcodes used by arm64 VEX
338499 --sim-hints parsing broken due to wrong order in tokens
338615 suppress glibc 2.20 optimized strcmp implementation for ARMv7
338681 Unable to unwind through clone thread created on i386-linux
338698 race condition between gdbsrv and vgdb on startup
338703 helgrind on arm-linux gets false positives in dynamic loader
338791 alt dwz files can be relative of debug/main file
338878 on MacOS: assertion 'VG_IS_PAGE_ALIGNED(clstack_end+1)' failed
338932 build V-trunk with gcc-trunk
338974 glibc 2.20 changed size of struct sigaction sa_flags field on s390
345079 Fix build problems in VEX/useful/test_main.c
n-i-bz Fix KVM_CREATE_IRQCHIP ioctl handling
n-i-bz s390x: Fix memory corruption for multithreaded applications
n-i-bz vex arm->IR: allow PC as basereg in some LDRD cases
n-i-bz internal error in Valgrind if vgdb transmit signals when ptrace invoked
n-i-bz Fix mingw64 support in valgrind.h (dev@, 9 May 2014)
n-i-bz drd manual: Document how to C++11 programs that use class "std::thread"
n-i-bz Add command-line option --default-suppressions
n-i-bz Add support for BLKDISCARDZEROES ioctl
n-i-bz ppc32/64: fix a regression with the mtfsb0/mtfsb1 instructions
n-i-bz Add support for sys_pivot_root and sys_unshare
(3.10.0.BETA1: 2 September 2014, vex r2940, valgrind r14428)
(3.10.0.BETA2: 8 September 2014, vex r2950, valgrind r14503)
(3.10.0: 10 September 2014, vex r2950, valgrind r14514)
Release 3.9.0 (31 October 2013)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.9.0 is a feature release with many improvements and the usual
collection of bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM/Linux, PPC32/Linux,
PPC64/Linux, S390X/Linux, MIPS32/Linux, MIPS64/Linux, ARM/Android,
X86/Android, X86/MacOSX 10.7 and AMD64/MacOSX 10.7. Support for
MacOSX 10.8 is significantly improved relative to the 3.8.0 release.
* ================== PLATFORM CHANGES =================
* Support for MIPS64 LE and BE running Linux. Valgrind has been
tested on MIPS64 Debian Squeeze and Debian Wheezy distributions.
* Support for MIPS DSP ASE on MIPS32 platforms.
* Support for s390x Decimal Floating Point instructions on hosts that
have the DFP facility installed.
* Support for POWER8 (Power ISA 2.07) instructions
* Support for Intel AVX2 instructions. This is available only on 64
bit code.
* Initial support for Intel Transactional Synchronization Extensions,
both RTM and HLE.
* Initial support for Hardware Transactional Memory on POWER.
* Improved support for MacOSX 10.8 (64-bit only). Memcheck can now
run large GUI apps tolerably well.
* ==================== TOOL CHANGES ====================
* Memcheck:
- Improvements in handling of vectorised code, leading to
significantly fewer false error reports. You need to use the flag
--partial-loads-ok=yes to get the benefits of these changes.
- Better control over the leak checker. It is now possible to
specify which leak kinds (definite/indirect/possible/reachable)
should be displayed, which should be regarded as errors, and which
should be suppressed by a given leak suppression. This is done
using the options --show-leak-kinds=kind1,kind2,..,
--errors-for-leak-kinds=kind1,kind2,.. and an optional
"match-leak-kinds:" line in suppression entries, respectively.
Note that generated leak suppressions contain this new line and
are therefore more specific than in previous releases. To get the
same behaviour as previous releases, remove the "match-leak-kinds:"
line from generated suppressions before using them.
- Reduced "possible leak" reports from the leak checker by the use
of better heuristics. The available heuristics provide detection
of valid interior pointers to std::stdstring, to new[] allocated
arrays with elements having destructors and to interior pointers
pointing to an inner part of a C++ object using multiple
inheritance. They can be selected individually using the
option --leak-check-heuristics=heur1,heur2,...
- Better control of stacktrace acquisition for heap-allocated
blocks. Using the --keep-stacktraces option, it is possible to
control independently whether a stack trace is acquired for each
allocation and deallocation. This can be used to create better
"use after free" errors or to decrease Valgrind's resource
consumption by recording less information.
- Better reporting of leak suppression usage. The list of used
suppressions (shown when the -v option is given) now shows, for
each leak suppressions, how many blocks and bytes it suppressed
during the last leak search.
* Helgrind:
- False errors resulting from the use of statically initialised
mutexes and condition variables (PTHREAD_MUTEX_INITIALISER, etc)
have been removed.
- False errors resulting from the use of pthread_cond_waits that
timeout, have been removed.
* ==================== OTHER CHANGES ====================
* Some attempt to tune Valgrind's space requirements to the expected
capabilities of the target:
- The default size of the translation cache has been reduced from 8
sectors to 6 on Android platforms, since each sector occupies
about 40MB when using Memcheck.
- The default size of the translation cache has been increased to 16
sectors on all other platforms, reflecting the fact that large
applications require instrumentation and storage of huge amounts
of code. For similar reasons, the number of memory mapped
segments that can be tracked has been increased by a factor of 6.
- In all cases, the maximum number of sectors in the translation
cache can be controlled by the new flag --num-transtab-sectors.
* Changes in how debug info (line numbers, etc) is read:
- Valgrind no longer temporarily mmaps the entire object to read
from it. Instead, reading is done through a small fixed sized
buffer. This avoids virtual memory usage spikes when Valgrind
reads debuginfo from large shared objects.
- A new experimental remote debug info server. Valgrind can read
debug info from a different machine (typically, a build host)
where debuginfo objects are stored. This can save a lot of time
and hassle when running Valgrind on resource-constrained targets
(phones, tablets) when the full debuginfo objects are stored
somewhere else. This is enabled by the --debuginfo-server=
option.
- Consistency checking between main and debug objects can be
disabled using the --allow-mismatched-debuginfo option.
* Stack unwinding by stack scanning, on ARM. Unwinding by stack
scanning can recover stack traces in some cases when the normal
unwind mechanisms fail. Stack scanning is best described as "a
nasty, dangerous and misleading hack" and so is disabled by default.
Use --unw-stack-scan-thresh and --unw-stack-scan-frames to enable
and control it.
* Detection and merging of recursive stack frame cycles. When your
program has recursive algorithms, this limits the memory used by
Valgrind for recorded stack traces and avoids recording
uninteresting repeated calls. This is controlled by the command
line option --merge-recursive-frame and by the monitor command
"v.set merge-recursive-frames".
* File name and line numbers for used suppressions. The list of used
suppressions (shown when the -v option is given) now shows, for each
used suppression, the file name and line number where the suppression
is defined.
* New and modified GDB server monitor features:
- valgrind.h has a new client request, VALGRIND_MONITOR_COMMAND,
that can be used to execute gdbserver monitor commands from the
client program.
- A new monitor command, "v.info open_fds", that gives the list of
open file descriptors and additional details.
- An optional message in the "v.info n_errs_found" monitor command,
for example "v.info n_errs_found test 1234 finished", allowing a
comment string to be added to the process output, perhaps for the
purpose of separating errors of different tests or test phases.
- A new monitor command "v.info execontext" that shows information
about the stack traces recorded by Valgrind.
- A new monitor command "v.do expensive_sanity_check_general" to run
some internal consistency checks.
* New flag --sigill-diagnostics to control whether a diagnostic
message is printed when the JIT encounters an instruction it can't
translate. The actual behavior -- delivery of SIGILL to the
application -- is unchanged.
* The maximum amount of memory that Valgrind can use on 64 bit targets
has been increased from 32GB to 64GB. This should make it possible
to run applications on Memcheck that natively require up to about 35GB.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
123837 system call: 4th argument is optional, depending on cmd
135425 memcheck should tell you where Freed blocks were Mallocd
164485 VG_N_SEGNAMES and VG_N_SEGMENTS are (still) too small
207815 Adds some of the drm ioctls to syswrap-linux.c
251569 vex amd64->IR: 0xF 0x1 0xF9 0xBF 0x90 0xD0 0x3 0x0 (RDTSCP)
252955 Impossible to compile with ccache
253519 Memcheck reports auxv pointer accesses as invalid reads.
263034 Crash when loading some PPC64 binaries
269599 Increase deepest backtrace
274695 s390x: Support "compare to/from logical" instructions (z196)
275800 s390x: Autodetect cache info (part 2)
280271 Valgrind reports possible memory leaks on still-reachable std::string
284540 Memcheck shouldn't count suppressions matching still-reachable [..]
289578 Backtraces with ARM unwind tables (stack scan flags)
296311 Wrong stack traces due to -fomit-frame-pointer (x86)
304832 ppc32: build failure
305431 Use find_buildid shdr fallback for separate .debug files
305728 Add support for AVX2 instructions
305948 ppc64: code generation for ShlD64 / ShrD64 asserts
306035 s390x: Fix IR generation for LAAG and friends
306054 s390x: Condition code computation for convert-to-int/logical
306098 s390x: alternate opcode form for convert to/from fixed
306587 Fix cache line detection from auxiliary vector for PPC.
306783 Mips unhandled syscall : 4025 / 4079 / 4182
307038 DWARF2 CFI reader: unhandled DW_OP_ opcode 0x8 (DW_OP_const1u et al)
307082 HG false positive: pthread_cond_destroy: destruction of unknown CV
307101 sys_capget second argument can be NULL
307103 sys_openat: If pathname is absolute, then dirfd is ignored.
307106 amd64->IR: f0 0f c0 02 (lock xadd byte)
307113 s390x: DFP support
307141 valgrind does't work in mips-linux system
307155 filter_gdb should filter out syscall-template.S T_PSEUDO
307285 x86_amd64 feature test for avx in test suite is wrong
307290 memcheck overlap testcase needs memcpy version filter
307463 Please add "&limit=0" to the "all open bugs" link
307465 --show-possibly-lost=no should reduce the error count / exit code
307557 Leaks on Mac OS X 10.7.5 libraries at ImageLoader::recursiveInit[..]
307729 pkgconfig support broken valgrind.pc
307828 Memcheck false errors SSE optimized wcscpy, wcscmp, wcsrchr, wcschr
307955 Building valgrind 3.7.0-r4 fails in Gentoo AMD64 when using clang
308089 Unhandled syscall on ppc64: prctl
308135 PPC32 MPC8xx has 16 bytes cache size
308321 testsuite memcheck filter interferes with gdb_filter
308333 == 307106
308341 vgdb should report process exit (or fatal signal)
308427 s390 memcheck reports tsearch cjump/cmove depends on uninit
308495 Remove build dependency on installed Xen headers
308573 Internal error on 64-bit instruction executed in 32-bit mode
308626 == 308627
308627 pmovmskb validity bit propagation is imprecise
308644 vgdb command for having the info for the track-fds option
308711 give more info about aspacemgr and arenas in out_of_memory
308717 ARM: implement fixed-point VCVT.F64.[SU]32
308718 ARM implement SMLALBB family of instructions
308886 Missing support for PTRACE_SET/GETREGSET
308930 syscall name_to_handle_at (303 on amd64) not handled
309229 V-bit tester does not report number of tests generated
309323 print unrecognized instuction on MIPS
309425 Provide a --sigill-diagnostics flag to suppress illegal [..]
309427 SSE optimized stpncpy trigger uninitialised value [..] errors
309430 Self hosting ppc64 encounters a vassert error on operand type
309600 valgrind is a bit confused about 0-sized sections
309823 Generate errors for still reachable blocks
309921 PCMPISTRI validity bit propagation is imprecise
309922 none/tests/ppc64/test_dfp5 sometimes fails
310169 The Iop_CmpORD class of Iops is not supported by the vbit checker.
310424 --read-var-info does not properly describe static variables
310792 search additional path for debug symbols
310931 s390x: Message-security assist (MSA) instruction extension [..]
311100 PPC DFP implementation of the integer operands is inconsistent [..]
311318 ARM: "128-bit constant is not implemented" error message
311407 ssse3 bcopy (actually converted memcpy) causes invalid read [..]
311690 V crashes because it redirects branches inside of a redirected function
311880 x86_64: make regtest hangs at shell_valid1
311922 WARNING: unhandled syscall: 170
311933 == 251569
312171 ppc: insn selection for DFP
312571 Rounding mode call wrong for the DFP Iops [..]
312620 Change to Iop_D32toD64 [..] for s390 DFP support broke ppc [..]
312913 Dangling pointers error should also report the alloc stack trace
312980 Building on Mountain Lion generates some compiler warnings
313267 Adding MIPS64/Linux port to Valgrind
313348 == 251569
313354 == 251569
313811 Buffer overflow in assert_fail
314099 coverity pointed out error in VEX guest_ppc_toIR.c insn_suffix
314269 ppc: dead code in insn selection
314718 ARM: implement integer divide instruction (sdiv and udiv)
315345 cl-format.xml and callgrind/dump.c don't agree on using cfl= or cfi=
315441 sendmsg syscall should ignore unset msghdr msg_flags
315534 msgrcv inside a thread causes valgrind to hang (block)
315545 Assertion '(UChar*)sec->tt[tteNo].tcptr <= (UChar*)hcode' failed
315689 disInstr(thumb): unhandled instruction: 0xF852 0x0E10 (LDRT)
315738 disInstr(arm): unhandled instruction: 0xEEBE0BEE (vcvt.s32.f64)
315959 valgrind man page has bogus SGCHECK (and no BBV) OPTIONS section
316144 valgrind.1 manpage contains unknown ??? strings [..]
316145 callgrind command line options in manpage reference (unknown) [..]
316145 callgrind command line options in manpage reference [..]
316181 drd: Fixed a 4x slowdown for certain applications
316503 Valgrind does not support SSE4 "movntdqa" instruction
316535 Use of |signed int| instead of |size_t| in valgrind messages
316696 fluidanimate program of parsec 2.1 stuck
316761 syscall open_by_handle_at (304 on amd64, 342 on x86) not handled
317091 Use -Wl,-Ttext-segment when static linking if possible [..]
317186 "Impossible happens" when occurs VCVT instruction on ARM
317318 Support for Threading Building Blocks "scalable_malloc"
317444 amd64->IR: 0xC4 0x41 0x2C 0xC2 0xD2 0x8 (vcmpeq_uqps)
317461 Fix BMI assembler configure check and avx2/bmi/fma vgtest prereqs
317463 bmi testcase IR SANITY CHECK FAILURE
317506 memcheck/tests/vbit-test fails with unknown opcode after [..]
318050 libmpiwrap fails to compile with out-of-source build
318203 setsockopt handling needs to handle SOL_SOCKET/SO_ATTACH_FILTER
318643 annotate_trace_memory tests infinite loop on arm and ppc [..]
318773 amd64->IR: 0xF3 0x48 0x0F 0xBC 0xC2 0xC3 0x66 0x0F
318929 Crash with: disInstr(thumb): 0xF321 0x0001 (ssat16)
318932 Add missing PPC64 and PPC32 system call support
319235 --db-attach=yes is broken with Yama (ptrace scoping) enabled
319395 Crash with unhandled instruction on STRT (Thumb) instructions
319494 VEX Makefile-gcc standalone build update after r2702
319505 [MIPSEL] Crash: unhandled UNRAY operator.
319858 disInstr(thumb): unhandled instruction on instruction STRBT
319932 disInstr(thumb): unhandled instruction on instruction STRHT
320057 Problems when we try to mmap more than 12 memory pages on MIPS32
320063 Memory from PTRACE_GET_THREAD_AREA is reported uninitialised
320083 disInstr(thumb): unhandled instruction on instruction LDRBT
320116 bind on AF_BLUETOOTH produces warnings because of sockaddr_rc padding
320131 WARNING: unhandled syscall: 369 on ARM (prlimit64)
320211 Stack buffer overflow in ./coregrind/m_main.c with huge TMPDIR
320661 vgModuleLocal_read_elf_debug_info(): "Assertion '!di->soname'
320895 add fanotify support (patch included)
320998 vex amd64->IR pcmpestri and pcmpestrm SSE4.2 instruction
321065 Valgrind updates for Xen 4.3
321148 Unhandled instruction: PLI (Thumb 1, 2, 3)
321363 Unhandled instruction: SSAX (ARM + Thumb)
321364 Unhandled instruction: SXTAB16 (ARM + Thumb)
321466 Unhandled instruction: SHASX (ARM + Thumb)
321467 Unhandled instruction: SHSAX (ARM + Thumb)
321468 Unhandled instruction: SHSUB16 (ARM + Thumb)
321619 Unhandled instruction: SHSUB8 (ARM + Thumb)
321620 Unhandled instruction: UASX (ARM + Thumb)
321621 Unhandled instruction: USAX (ARM + Thumb)
321692 Unhandled instruction: UQADD16 (ARM + Thumb)
321693 Unhandled instruction: LDRSBT (Thumb)
321694 Unhandled instruction: UQASX (ARM + Thumb)
321696 Unhandled instruction: UQSAX (Thumb + ARM)
321697 Unhandled instruction: UHASX (ARM + Thumb)
321703 Unhandled instruction: UHSAX (ARM + Thumb)
321704 Unhandled instruction: REVSH (ARM + Thumb)
321730 Add cg_diff and cg_merge man pages
321738 Add vgdb and valgrind-listener man pages
321814 == 315545
321891 Unhandled instruction: LDRHT (Thumb)
321960 pthread_create() then alloca() causing invalid stack write errors
321969 ppc32 and ppc64 don't support [lf]setxattr
322254 Show threadname together with tid if set by application
322294 Add initial support for IBM Power ISA 2.07
322368 Assertion failure in wqthread_hijack under OS X 10.8
322563 vex mips->IR: 0x70 0x83 0xF0 0x3A
322807 VALGRIND_PRINTF_BACKTRACE writes callstack to xml and text to stderr
322851 0bXXX binary literal syntax is not standard
323035 Unhandled instruction: LDRSHT(Thumb)
323036 Unhandled instruction: SMMLS (ARM and Thumb)
323116 The memcheck/tests/ppc64/power_ISA2_05.c fails to build [..]
323175 Unhandled instruction: SMLALD (ARM + Thumb)
323177 Unhandled instruction: SMLSLD (ARM + Thumb)
323432 Calling pthread_cond_destroy() or pthread_mutex_destroy() [..]
323437 Phase 2 support for IBM Power ISA 2.07
323713 Support mmxext (integer sse) subset on i386 (athlon)
323803 Transactional memory instructions are not supported for Power
323893 SSE3 not available on amd cpus in valgrind
323905 Probable false positive from Valgrind/drd on close()
323912 valgrind.h header isn't compatible for mingw64
324047 Valgrind doesn't support [LDR,ST]{S}[B,H]T ARM instructions
324149 helgrind: When pthread_cond_timedwait returns ETIMEDOUT [..]
324181 mmap does not handle MAP_32BIT
324227 memcheck false positive leak when a thread calls exit+block [..]
324421 Support for fanotify API on ARM architecture
324514 gdbserver monitor cmd output behaviour consistency [..]
324518 ppc64: Emulation of dcbt instructions does not handle [..]
324546 none/tests/ppc32 test_isa_2_07_part2 requests -m64
324582 When access is made to freed memory, report both allocation [..]
324594 Fix overflow computation for Power ISA 2.06 insns: mulldo/mulldo.
324765 ppc64: illegal instruction when executing none/tests/ppc64/jm-misc
324816 Incorrect VEX implementation for xscvspdp/xvcvspdp for SNaN inputs
324834 Unhandled instructions in Microsoft C run-time for x86_64
324894 Phase 3 support for IBM Power ISA 2.07
326091 drd: Avoid false race reports from optimized strlen() impls
326113 valgrind libvex hwcaps error on AMD64
n-i-bz Some wrong command line options could be ignored
n-i-bz patch to allow fair-sched on android
n-i-bz report error for vgdb snapshot requested before execution
n-i-bz same as 303624 (fixed in 3.8.0), but for x86 android
(3.9.0: 31 October 2013, vex r2796, valgrind r13708)
Release 3.8.1 (19 September 2012)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.8.1 is a bug fix release. It fixes some assertion failures in 3.8.0
that occur moderately frequently in real use cases, adds support for
some missing instructions on ARM, and fixes a deadlock condition on
MacOSX. If you package or deliver 3.8.0 for others to use, you might
want to consider upgrading to 3.8.1 instead.
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
284004 == 301281
289584 Unhandled instruction: 0xF 0x29 0xE5 (MOVAPS)
295808 amd64->IR: 0xF3 0xF 0xBC 0xC0 (TZCNT)
298281 wcslen causes false(?) uninitialised value warnings
301281 valgrind hangs on OS X when the process calls system()
304035 disInstr(arm): unhandled instruction 0xE1023053
304867 implement MOVBE instruction in x86 mode
304980 Assertion 'lo <= hi' failed in vgModuleLocal_find_rx_mapping
305042 amd64: implement 0F 7F encoding of movq between two registers
305199 ARM: implement QDADD and QDSUB
305321 amd64->IR: 0xF 0xD 0xC (prefetchw)
305513 killed by fatal signal: SIGSEGV
305690 DRD reporting invalid semaphore when sem_trywait fails
305926 Invalid alignment checks for some AVX instructions
306297 disInstr(thumb): unhandled instruction 0xE883 0x000C
306310 3.8.0 release tarball missing some files
306612 RHEL 6 glibc-2.X default suppressions need /lib*/libc-*patterns
306664 vex amd64->IR: 0x66 0xF 0x3A 0x62 0xD1 0x46 0x66 0xF
n-i-bz shmat of a segment > 4Gb does not work
n-i-bz simulate_control_c script wrong USR1 signal number on mips
n-i-bz vgdb ptrace calls wrong on mips [...]
n-i-bz Fixes for more MPI false positives
n-i-bz exp-sgcheck's memcpy causes programs to segfault
n-i-bz OSX build w/ clang: asserts at startup
n-i-bz Incorrect undef'dness prop for Iop_DPBtoBCD and Iop_BCDtoDPB
n-i-bz fix a couple of union tag-vs-field mixups
n-i-bz OSX: use __NR_poll_nocancel rather than __NR_poll
The following bugs were fixed in 3.8.0 but not listed in this NEWS
file at the time:
254088 Valgrind should know about UD2 instruction
301280 == 254088
301902 == 254088
304754 NEWS blows TeX's little mind
(3.8.1: 19 September 2012, vex r2537, valgrind r12996)
Release 3.8.0 (10 August 2012)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.8.0 is a feature release with many improvements and the usual
collection of bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM/Linux, PPC32/Linux,
PPC64/Linux, S390X/Linux, MIPS/Linux, ARM/Android, X86/Android,
X86/MacOSX 10.6/10.7 and AMD64/MacOSX 10.6/10.7. Support for recent
distros and toolchain components (glibc 2.16, gcc 4.7) has been added.
There is initial support for MacOSX 10.8, but it is not usable for
serious work at present.
* ================== PLATFORM CHANGES =================
* Support for MIPS32 platforms running Linux. Valgrind has been
tested on MIPS32 and MIPS32r2 platforms running different Debian
Squeeze and MeeGo distributions. Both little-endian and big-endian
cores are supported. The tools Memcheck, Massif and Lackey have
been tested and are known to work. See README.mips for more details.
* Preliminary support for Android running on x86.
* Preliminary (as-yet largely unusable) support for MacOSX 10.8.
* Support for Intel AVX instructions and for AES instructions. This
support is available only for 64 bit code.
* Support for POWER Decimal Floating Point instructions.
* ==================== TOOL CHANGES ====================
* Non-libc malloc implementations are now supported. This is useful
for tools that replace malloc (Memcheck, Massif, DRD, Helgrind).
Using the new option --soname-synonyms, such tools can be informed
that the malloc implementation is either linked statically into the
executable, or is present in some other shared library different
from libc.so. This makes it possible to process statically linked
programs, and programs using other malloc libraries, for example
TCMalloc or JEMalloc.
* For tools that provide their own replacement for malloc et al, the
option --redzone-size=<number> allows users to specify the size of
the padding blocks (redzones) added before and after each client
allocated block. Smaller redzones decrease the memory needed by
Valgrind. Bigger redzones increase the chance to detect blocks
overrun or underrun. Prior to this change, the redzone size was
hardwired to 16 bytes in Memcheck.
* Memcheck:
- The leak_check GDB server monitor command now can
control the maximum nr of loss records to output.
- Reduction of memory use for applications allocating
many blocks and/or having many partially defined bytes.
- Addition of GDB server monitor command 'block_list' that lists
the addresses/sizes of the blocks of a leak search loss record.
- Addition of GDB server monitor command 'who_points_at' that lists
the locations pointing at a block.
- If a redzone size > 0 is given, VALGRIND_MALLOCLIKE_BLOCK now will
detect an invalid access of these redzones, by marking them
noaccess. Similarly, if a redzone size is given for a memory
pool, VALGRIND_MEMPOOL_ALLOC will mark the redzones no access.
This still allows to find some bugs if the user has forgotten to
mark the pool superblock noaccess.
- Performance of memory leak check has been improved, especially in
cases where there are many leaked blocks and/or many suppression
rules used to suppress leak reports.
- Reduced noise (false positive) level on MacOSX 10.6/10.7, due to
more precise analysis, which is important for LLVM/Clang
generated code. This is at the cost of somewhat reduced
performance. Note there is no change to analysis precision or
costs on Linux targets.
* DRD:
- Added even more facilities that can help finding the cause of a data
race, namely the command-line option --ptrace-addr and the macro
DRD_STOP_TRACING_VAR(x). More information can be found in the manual.
- Fixed a subtle bug that could cause false positive data race reports.
* ==================== OTHER CHANGES ====================
* The C++ demangler has been updated so as to work well with C++
compiled by up to at least g++ 4.6.
* Tool developers can make replacement/wrapping more flexible thanks
to the new option --soname-synonyms. This was reported above, but
in fact is very general and applies to all function
replacement/wrapping, not just to malloc-family functions.
* Round-robin scheduling of threads can be selected, using the new
option --fair-sched= yes. Prior to this change, the pipe-based
thread serialisation mechanism (which is still the default) could
give very unfair scheduling. --fair-sched=yes improves
responsiveness of interactive multithreaded applications, and
improves repeatability of results from the thread checkers Helgrind
and DRD.
* For tool developers: support to run Valgrind on Valgrind has been
improved. We can now routinely Valgrind on Helgrind or Memcheck.
* gdbserver now shows the float shadow registers as integer
rather than float values, as the shadow values are mostly
used as bit patterns.
* Increased limit for the --num-callers command line flag to 500.
* Performance improvements for error matching when there are many
suppression records in use.
* Improved support for DWARF4 debugging information (bug 284184).
* Initial support for DWZ compressed Dwarf debug info.
* Improved control over the IR optimiser's handling of the tradeoff
between performance and precision of exceptions. Specifically,
--vex-iropt-precise-memory-exns has been removed and replaced by
--vex-iropt-register-updates, with extended functionality. This
allows the Valgrind gdbserver to always show up to date register
values to GDB.
* Modest performance gains through the use of translation chaining for
JIT-generated code.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
197914 Building valgrind from svn now requires automake-1.10
203877 increase to 16Mb maximum allowed alignment for memalign et al
219156 Handle statically linked malloc or other malloc lib (e.g. tcmalloc)
247386 make perf does not run all performance tests
270006 Valgrind scheduler unfair
270777 Adding MIPS/Linux port to Valgrind
270796 s390x: Removed broken support for the TS insn
271438 Fix configure for proper SSE4.2 detection
273114 s390x: Support TR, TRE, TROO, TROT, TRTO, and TRTT instructions
273475 Add support for AVX instructions
274078 improved configure logic for mpicc
276993 fix mremap 'no thrash checks'
278313 Fedora 15/x64: err read debug info with --read-var-info=yes flag
281482 memcheck incorrect byte allocation count in realloc() for silly argument
282230 group allocator for small fixed size, use it for MC_Chunk/SEc vbit
283413 Fix wrong sanity check
283671 Robustize alignment computation in LibVEX_Alloc
283961 Adding support for some HCI IOCTLs
284124 parse_type_DIE: confused by: DWARF 4
284864 == 273475 (Add support for AVX instructions)
285219 Too-restrictive constraints for Thumb2 "SP plus/minus register"
285662 (MacOSX): Memcheck needs to replace memcpy/memmove
285725 == 273475 (Add support for AVX instructions)
286261 add wrapper for linux I2C_RDWR ioctl
286270 vgpreload is not friendly to 64->32 bit execs, gives ld.so warnings
286374 Running cachegrind with --branch-sim=yes on 64-bit PowerPC program fails
286384 configure fails "checking for a supported version of gcc"
286497 == 273475 (Add support for AVX instructions)
286596 == 273475 (Add support for AVX instructions)
286917 disInstr(arm): unhandled instruction: QADD (also QSUB)
287175 ARM: scalar VFP fixed-point VCVT instructions not handled
287260 Incorrect conditional jump or move depends on uninitialised value(s)
287301 vex amd64->IR: 0x66 0xF 0x38 0x41 0xC0 0xB8 0x0 0x0 (PHMINPOSUW)
287307 == 273475 (Add support for AVX instructions)
287858 VG_(strerror): unknown error
288298 (MacOSX) unhandled syscall shm_unlink
288995 == 273475 (Add support for AVX instructions)
289470 Loading of large Mach-O thin binaries fails.
289656 == 273475 (Add support for AVX instructions)
289699 vgdb connection in relay mode erroneously closed due to buffer overrun
289823 == 293754 (PCMPxSTRx not implemented for 16-bit characters)
289839 s390x: Provide support for unicode conversion instructions
289939 monitor cmd 'leak_check' with details about leaked or reachable blocks
290006 memcheck doesn't mark %xmm as initialized after "pcmpeqw %xmm %xmm"
290655 Add support for AESKEYGENASSIST instruction
290719 valgrind-3.7.0 fails with automake-1.11.2 due to"pkglibdir" usage
290974 vgdb must align pages to VKI_SHMLBA (16KB) on ARM
291253 ES register not initialised in valgrind simulation
291568 Fix 3DNOW-related crashes with baseline x86_64 CPU (w patch)
291865 s390x: Support the "Compare Double and Swap" family of instructions
292300 == 273475 (Add support for AVX instructions)
292430 unrecognized instruction in __intel_get_new_mem_ops_cpuid
292493 == 273475 (Add support for AVX instructions)
292626 Missing fcntl F_SETOWN_EX and F_GETOWN_EX support
292627 Missing support for some SCSI ioctls
292628 none/tests/x86/bug125959-x86.c triggers undefined behavior
292841 == 273475 (Add support for AVX instructions)
292993 implement the getcpu syscall on amd64-linux
292995 Implement the “cross memory attach” syscalls introduced in Linux 3.2
293088 Add some VEX sanity checks for ppc64 unhandled instructions
293751 == 290655 (Add support for AESKEYGENASSIST instruction)
293754 PCMPxSTRx not implemented for 16-bit characters
293755 == 293754 (No tests for PCMPxSTRx on 16-bit characters)
293808 CLFLUSH not supported by latest VEX for amd64
294047 valgrind does not correctly emulate prlimit64(..., RLIMIT_NOFILE, ...)
294048 MPSADBW instruction not implemented
294055 regtest none/tests/shell fails when locale is not set to C
294185 INT 0x44 (and others) not supported on x86 guest, but used by Jikes RVM
294190 --vgdb-error=xxx can be out of sync with errors shown to the user
294191 amd64: fnsave/frstor and 0x66 size prefixes on FP instructions
294260 disInstr_AMD64: disInstr miscalculated next %rip
294523 --partial-loads-ok=yes causes false negatives
294617 vex amd64->IR: 0x66 0xF 0x3A 0xDF 0xD1 0x1 0xE8 0x6A
294736 vex amd64->IR: 0x48 0xF 0xD7 0xD6 0x48 0x83
294812 patch allowing to run (on x86 at least) helgrind/drd on tool.
295089 can not annotate source for both helgrind and drd
295221 POWER Processor decimal floating point instruction support missing
295427 building for i386 with clang on darwin11 requires "-new_linker linker"
295428 coregrind/m_main.c has incorrect x86 assembly for darwin
295590 Helgrind: Assertion 'cvi->nWaiters > 0' failed
295617 ARM - Add some missing syscalls
295799 Missing \n with get_vbits in gdbserver when line is % 80 [...]
296229 Linux user input device ioctls missing wrappers
296318 ELF Debug info improvements (more than one rx/rw mapping)
296422 Add translation chaining support
296457 vex amd64->IR: 0x66 0xF 0x3A 0xDF 0xD1 0x1 0xE8 0x6A (dup of AES)
296792 valgrind 3.7.0: add SIOCSHWTSTAMP (0x89B0) ioctl wrapper
296983 Fix build issues on x86_64/ppc64 without 32-bit toolchains
297078 gdbserver signal handling problems [..]
297147 drd false positives on newly allocated memory
297329 disallow decoding of IBM Power DFP insns on some machines
297497 POWER Processor decimal floating point instruction support missing
297701 Another alias for strncasecmp_l in libc-2.13.so
297911 'invalid write' not reported when using APIs for custom mem allocators.
297976 s390x: revisit EX implementation
297991 Valgrind interferes with mmap()+ftell()
297992 Support systems missing WIFCONTINUED (e.g. pre-2.6.10 Linux)
297993 Fix compilation of valgrind with gcc -g3.
298080 POWER Processor DFP support missing, part 3
298227 == 273475 (Add support for AVX instructions)
298335 == 273475 (Add support for AVX instructions)
298354 Unhandled ARM Thumb instruction 0xEB0D 0x0585 (streq)
298394 s390x: Don't bail out on an unknown machine model. [..]
298421 accept4() syscall (366) support is missing for ARM
298718 vex amd64->IR: 0xF 0xB1 0xCB 0x9C 0x8F 0x45
298732 valgrind installation problem in ubuntu with kernel version 3.x
298862 POWER Processor DFP instruction support missing, part 4
298864 DWARF reader mis-parses DW_FORM_ref_addr
298943 massif asserts with --pages-as-heap=yes when brk is changing [..]
299053 Support DWARF4 DW_AT_high_pc constant form
299104 == 273475 (Add support for AVX instructions)
299316 Helgrind: hg_main.c:628 (map_threads_lookup): Assertion 'thr' failed.
299629 dup3() syscall (358) support is missing for ARM
299694 POWER Processor DFP instruction support missing, part 5
299756 Ignore --free-fill for MEMPOOL_FREE and FREELIKE client requests
299803 == 273475 (Add support for AVX instructions)
299804 == 273475 (Add support for AVX instructions)
299805 == 273475 (Add support for AVX instructions)
300140 ARM - Missing (T1) SMMUL
300195 == 296318 (ELF Debug info improvements (more than one rx/rw mapping))
300389 Assertion `are_valid_hwcaps(VexArchAMD64, [..])' failed.
300414 FCOM and FCOMP unimplemented for amd64 guest
301204 infinite loop in canonicaliseSymtab with ifunc symbol
301229 == 203877 (increase to 16Mb maximum allowed alignment for memalign etc)
301265 add x86 support to Android build
301984 configure script doesn't detect certain versions of clang
302205 Fix compiler warnings for POWER VEX code and POWER test cases
302287 Unhandled movbe instruction on Atom processors
302370 PPC: fnmadd, fnmsub, fnmadds, fnmsubs insns always negate the result
302536 Fix for the POWER Valgrind regression test: memcheck-ISA2.0.
302578 Unrecognized isntruction 0xc5 0x32 0xc2 0xca 0x09 vcmpngess
302656 == 273475 (Add support for AVX instructions)
302709 valgrind for ARM needs extra tls support for android emulator [..]
302827 add wrapper for CDROM_GET_CAPABILITY
302901 Valgrind crashes with dwz optimized debuginfo
302918 Enable testing of the vmaddfp and vnsubfp instructions in the testsuite
303116 Add support for the POWER instruction popcntb
303127 Power test suite fixes for frsqrte, vrefp, and vrsqrtefp instructions.
303250 Assertion `instrs_in->arr_used <= 10000' failed w/ OpenSSL code
303466 == 273475 (Add support for AVX instructions)
303624 segmentation fault on Android 4.1 (e.g. on Galaxy Nexus OMAP)
303963 strstr() function produces wrong results under valgrind callgrind
304054 CALL_FN_xx macros need to enforce stack alignment
304561 tee system call not supported
715750 (MacOSX): Incorrect invalid-address errors near 0xFFFFxxxx (mozbug#)
n-i-bz Add missing gdbserver xml files for shadow registers for ppc32
n-i-bz Bypass gcc4.4/4.5 code gen bugs causing out of memory or asserts
n-i-bz Fix assert in gdbserver for watchpoints watching the same address
n-i-bz Fix false positive in sys_clone on amd64 when optional args [..]
n-i-bz s390x: Shadow registers can now be examined using vgdb
(3.8.0-TEST3: 9 August 2012, vex r2465, valgrind r12865)
(3.8.0: 10 August 2012, vex r2465, valgrind r12866)
Release 3.7.0 (5 November 2011)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.7.0 is a feature release with many significant improvements and the
usual collection of bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM/Linux, PPC32/Linux,
PPC64/Linux, S390X/Linux, ARM/Android, X86/Darwin and AMD64/Darwin.
Support for recent distros and toolchain components (glibc 2.14, gcc
4.6, MacOSX 10.7) has been added.
* ================== PLATFORM CHANGES =================
* Support for IBM z/Architecture (s390x) running Linux. Valgrind can
analyse 64-bit programs running on z/Architecture. Most user space
instructions up to and including z10 are supported. Valgrind has
been tested extensively on z9, z10, and z196 machines running SLES
10/11, RedHat 5/6m, and Fedora. The Memcheck and Massif tools are
known to work well. Callgrind, Helgrind, and DRD work reasonably
well on z9 and later models. See README.s390 for more details.
* Preliminary support for MacOSX 10.7 and XCode 4. Both 32- and
64-bit processes are supported. Some complex threaded applications
(Firefox) are observed to hang when run as 32 bit applications,
whereas 64-bit versions run OK. The cause is unknown. Memcheck
will likely report some false errors. In general, expect some rough
spots. This release also supports MacOSX 10.6, but drops support
for 10.5.
* Preliminary support for Android (on ARM). Valgrind can now run
large applications (eg, Firefox) on (eg) a Samsung Nexus S. See
README.android for more details, plus instructions on how to get
started.
* Support for the IBM Power ISA 2.06 (Power7 instructions)
* General correctness and performance improvements for ARM/Linux, and,
by extension, ARM/Android.
* Further solidification of support for SSE 4.2 in 64-bit mode. AVX
instruction set support is under development but is not available in
this release.
* Support for AIX5 has been removed.
* ==================== TOOL CHANGES ====================
* Memcheck: some incremental changes:
- reduction of memory use in some circumstances
- improved handling of freed memory, which in some circumstances
can cause detection of use-after-free that would previously have
been missed
- fix of a longstanding bug that could cause false negatives (missed
errors) in programs doing vector saturated narrowing instructions.
* Helgrind: performance improvements and major memory use reductions,
particularly for large, long running applications which perform many
synchronisation (lock, unlock, etc) events. Plus many smaller
changes:
- display of locksets for both threads involved in a race
- general improvements in formatting/clarity of error messages
- addition of facilities and documentation regarding annotation
of thread safe reference counted C++ classes
- new flag --check-stack-refs=no|yes [yes], to disable race checking
on thread stacks (a performance hack)
- new flag --free-is-write=no|yes [no], to enable detection of races
where one thread accesses heap memory but another one frees it,
without any coordinating synchronisation event
* DRD: enabled XML output; added support for delayed thread deletion
in order to detect races that occur close to the end of a thread
(--join-list-vol); fixed a memory leak triggered by repeated client
memory allocatation and deallocation; improved Darwin support.
* exp-ptrcheck: this tool has been renamed to exp-sgcheck
* exp-sgcheck: this tool has been reduced in scope so as to improve
performance and remove checking that Memcheck does better.
Specifically, the ability to check for overruns for stack and global
arrays is unchanged, but the ability to check for overruns of heap
blocks has been removed. The tool has accordingly been renamed to
exp-sgcheck ("Stack and Global Array Checking").
* ==================== OTHER CHANGES ====================
* GDB server: Valgrind now has an embedded GDB server. That means it
is possible to control a Valgrind run from GDB, doing all the usual
things that GDB can do (single stepping, breakpoints, examining
data, etc). Tool-specific functionality is also available. For
example, it is possible to query the definedness state of variables
or memory from within GDB when running Memcheck; arbitrarily large
memory watchpoints are supported, etc. To use the GDB server, start
Valgrind with the flag --vgdb-error=0 and follow the on-screen
instructions.
* Improved support for unfriendly self-modifying code: a new option
--smc-check=all-non-file is available. This adds the relevant
consistency checks only to code that originates in non-file-backed
mappings. In effect this confines the consistency checking only to
code that is or might be JIT generated, and avoids checks on code
that must have been compiled ahead of time. This significantly
improves performance on applications that generate code at run time.
* It is now possible to build a working Valgrind using Clang-2.9 on
Linux.
* new client requests VALGRIND_{DISABLE,ENABLE}_ERROR_REPORTING.
These enable and disable error reporting on a per-thread, and
nestable, basis. This is useful for hiding errors in particularly
troublesome pieces of code. The MPI wrapper library (libmpiwrap.c)
now uses this facility.
* Added the --mod-funcname option to cg_diff.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (http://bugs.kde.org/enter_valgrind_bug.cgi) rather than
mailing the developers (or mailing lists) directly -- bugs that are
not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
79311 malloc silly arg warning does not give stack trace
210935 port valgrind.h (not valgrind) to win32 to support client requests
214223 valgrind SIGSEGV on startup gcc 4.4.1 ppc32 (G4) Ubuntu 9.10
243404 Port to zSeries
243935 Helgrind: incorrect handling of ANNOTATE_HAPPENS_BEFORE()/AFTER()
247223 non-x86: Suppress warning: 'regparm' attribute directive ignored
250101 huge "free" memory usage due to m_mallocfree.c fragmentation
253206 Some fixes for the faultstatus testcase
255223 capget testcase fails when running as root
256703 xlc_dbl_u32.c testcase broken
256726 Helgrind tests have broken inline asm
259977 == 214223 (Valgrind segfaults doing __builtin_longjmp)
264800 testcase compile failure on zseries
265762 make public VEX headers compilable by G++ 3.x
265771 assertion in jumps.c (r11523) fails with glibc-2.3
266753 configure script does not give the user the option to not use QtCore
266931 gen_insn_test.pl is broken
266961 ld-linux.so.2 i?86-linux strlen issues
266990 setns instruction causes false positive
267020 Make directory for temporary files configurable at run-time.
267342 == 267997 (segmentation fault on Mac OS 10.6)
267383 Assertion 'vgPlain_strlen(dir) + vgPlain_strlen(file) + 1 < 256' failed
267413 Assertion 'DRD_(g_threadinfo)[tid].synchr_nesting >= 1' failed.
267488 regtest: darwin support for 64-bit build
267552 SIGSEGV (misaligned_stack_error) with DRD, but not with other tools
267630 Add support for IBM Power ISA 2.06 -- stage 1
267769 == 267997 (Darwin: memcheck triggers segmentation fault)
267819 Add client request for informing the core about reallocation
267925 laog data structure quadratic for a single sequence of lock
267968 drd: (vgDrd_thread_set_joinable): Assertion '0 <= (int)tid ..' failed
267997 MacOSX: 64-bit V segfaults on launch when built with Xcode 4.0.1
268513 missed optimizations in fold_Expr
268619 s390x: fpr - gpr transfer facility
268620 s390x: reconsider "long displacement" requirement
268621 s390x: improve IR generation for XC
268715 s390x: FLOGR is not universally available
268792 == 267997 (valgrind seg faults on startup when compiled with Xcode 4)
268930 s390x: MHY is not universally available
269078 arm->IR: unhandled instruction SUB (SP minus immediate/register)
269079 Support ptrace system call on ARM
269144 missing "Bad option" error message
269209 conditional load and store facility (z196)
269354 Shift by zero on x86 can incorrectly clobber CC_NDEP
269641 == 267997 (valgrind segfaults immediately (segmentation fault))
269736 s390x: minor code generation tweaks
269778 == 272986 (valgrind.h: swap roles of VALGRIND_DO_CLIENT_REQUEST() ..)
269863 s390x: remove unused function parameters
269864 s390x: tweak s390_emit_load_cc
269884 == 250101 (overhead for huge blocks exhausts space too soon)
270082 s390x: Make sure to point the PSW address to the next address on SIGILL
270115 s390x: rewrite some testcases
270309 == 267997 (valgrind crash on startup)
270320 add support for Linux FIOQSIZE ioctl() call
270326 segfault while trying to sanitize the environment passed to execle
270794 IBM POWER7 support patch causes regression in none/tests
270851 IBM POWER7 fcfidus instruction causes memcheck to fail
270856 IBM POWER7 xsnmaddadp instruction causes memcheck to fail on 32bit app
270925 hyper-optimized strspn() in /lib64/libc-2.13.so needs fix
270959 s390x: invalid use of R0 as base register
271042 VSX configure check fails when it should not
271043 Valgrind build fails with assembler error on ppc64 with binutils 2.21
271259 s390x: fix code confusion
271337 == 267997 (Valgrind segfaults on MacOS X)
271385 s390x: Implement Ist_MBE
271501 s390x: misc cleanups
271504 s390x: promote likely and unlikely
271579 ppc: using wrong enum type
271615 unhandled instruction "popcnt" (arch=amd10h)
271730 Fix bug when checking ioctls: duplicate check
271776 s390x: provide STFLE instruction support
271779 s390x: provide clock instructions like STCK
271799 Darwin: ioctls without an arg report a memory error
271820 arm: fix type confusion
271917 pthread_cond_timedwait failure leads to not-locked false positive
272067 s390x: fix DISP20 macro
272615 A typo in debug output in mc_leakcheck.c
272661 callgrind_annotate chokes when run from paths containing regex chars
272893 amd64->IR: 0x66 0xF 0x38 0x2B 0xC1 0x66 0xF 0x7F == (closed as dup)
272955 Unhandled syscall error for pwrite64 on ppc64 arch
272967 make documentation build-system more robust
272986 Fix gcc-4.6 warnings with valgrind.h
273318 amd64->IR: 0x66 0xF 0x3A 0x61 0xC1 0x38 (missing PCMPxSTRx case)
273318 unhandled PCMPxSTRx case: vex amd64->IR: 0x66 0xF 0x3A 0x61 0xC1 0x38
273431 valgrind segfaults in evalCfiExpr (debuginfo.c:2039)
273465 Callgrind: jumps.c:164 (new_jcc): Assertion '(0 <= jmp) && ...'
273536 Build error: multiple definition of `vgDrd_pthread_cond_initializer'
273640 ppc64-linux: unhandled syscalls setresuid(164) and setresgid(169)
273729 == 283000 (Illegal opcode for SSE2 "roundsd" instruction)
273778 exp-ptrcheck: unhandled sysno == 259
274089 exp-ptrcheck: unhandled sysno == 208
274378 s390x: Various dispatcher tweaks
274447 WARNING: unhandled syscall: 340
274776 amd64->IR: 0x66 0xF 0x38 0x2B 0xC5 0x66
274784 == 267997 (valgrind ls -l results in Segmentation Fault)
274926 valgrind does not build against linux-3
275148 configure FAIL with glibc-2.14
275151 Fedora 15 / glibc-2.14 'make regtest' FAIL
275168 Make Valgrind work for MacOSX 10.7 Lion
275212 == 275284 (lots of false positives from __memcpy_ssse3_back et al)
275278 valgrind does not build on Linux kernel 3.0.* due to silly
275284 Valgrind memcpy/memmove redirection stopped working in glibc 2.14/x86_64
275308 Fix implementation for ppc64 fres instruc
275339 s390x: fix testcase compile warnings
275517 s390x: Provide support for CKSM instruction
275710 s390x: get rid of redundant address mode calculation
275815 == 247894 (Valgrind doesn't know about Linux readahead(2) syscall)
275852 == 250101 (valgrind uses all swap space and is killed)
276784 Add support for IBM Power ISA 2.06 -- stage 3
276987 gdbsrv: fix tests following recent commits
277045 Valgrind crashes with unhandled DW_OP_ opcode 0x2a
277199 The test_isa_2_06_part1.c in none/tests/ppc64 should be a symlink
277471 Unhandled syscall: 340
277610 valgrind crashes in VG_(lseek)(core_fd, phdrs[idx].p_offset, ...)
277653 ARM: support Thumb2 PLD instruction
277663 ARM: NEON float VMUL by scalar incorrect
277689 ARM: tests for VSTn with register post-index are broken
277694 ARM: BLX LR instruction broken in ARM mode
277780 ARM: VMOV.F32 (immediate) instruction is broken
278057 fuse filesystem syscall deadlocks
278078 Unimplemented syscall 280 on ppc32
278349 F_GETPIPE_SZ and F_SETPIPE_SZ Linux fcntl commands
278454 VALGRIND_STACK_DEREGISTER has wrong output type
278502 == 275284 (Valgrind confuses memcpy() and memmove())
278892 gdbsrv: factorize gdb version handling, fix doc and typos
279027 Support for MVCL and CLCL instruction
279027 s390x: Provide support for CLCL and MVCL instructions
279062 Remove a redundant check in the insn selector for ppc.
279071 JDK creates PTEST with redundant REX.W prefix
279212 gdbsrv: add monitor cmd v.info scheduler.
279378 exp-ptrcheck: the 'impossible' happened on mkfifo call
279698 memcheck discards valid-bits for packuswb
279795 memcheck reports uninitialised values for mincore on amd64
279994 Add support for IBM Power ISA 2.06 -- stage 3
280083 mempolicy syscall check errors
280290 vex amd64->IR: 0x66 0xF 0x38 0x28 0xC1 0x66 0xF 0x6F
280710 s390x: config files for nightly builds
280757 /tmp dir still used by valgrind even if TMPDIR is specified
280965 Valgrind breaks fcntl locks when program does mmap
281138 WARNING: unhandled syscall: 340
281241 == 275168 (valgrind useless on Macos 10.7.1 Lion)
281304 == 275168 (Darwin: dyld "cannot load inserted library")
281305 == 275168 (unhandled syscall: unix:357 on Darwin 11.1)
281468 s390x: handle do_clone and gcc clones in call traces
281488 ARM: VFP register corruption
281828 == 275284 (false memmove warning: "Source and destination overlap")
281883 s390x: Fix system call wrapper for "clone".
282105 generalise 'reclaimSuperBlock' to also reclaim splittable superblock
282112 Unhandled instruction bytes: 0xDE 0xD9 0x9B 0xDF (fcompp)
282238 SLES10: make check fails
282979 strcasestr needs replacement with recent(>=2.12) glibc
283000 vex amd64->IR: 0x66 0xF 0x3A 0xA 0xC0 0x9 0xF3 0xF
283243 Regression in ppc64 memcheck tests
283325 == 267997 (Darwin: V segfaults on startup when built with Xcode 4.0)
283427 re-connect epoll_pwait syscall on ARM linux
283600 gdbsrv: android: port vgdb.c
283709 none/tests/faultstatus needs to account for page size
284305 filter_gdb needs enhancement to work on ppc64
284384 clang 3.1 -Wunused-value warnings in valgrind.h, memcheck.h
284472 Thumb2 ROR.W encoding T2 not implemented
284621 XML-escape process command line in XML output
n-i-bz cachegrind/callgrind: handle CPUID information for Core iX Intel CPUs
that have non-power-of-2 sizes (also AMDs)
n-i-bz don't be spooked by libraries mashed by elfhack
n-i-bz don't be spooked by libxul.so linked with gold
n-i-bz improved checking for VALGRIND_CHECK_MEM_IS_DEFINED
(3.7.0-TEST1: 27 October 2011, vex r2228, valgrind r12245)
(3.7.0.RC1: 1 November 2011, vex r2231, valgrind r12257)
(3.7.0: 5 November 2011, vex r2231, valgrind r12258)
Release 3.6.1 (16 February 2011)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.6.1 is a bug fix release. It adds support for some SSE4
instructions that were omitted in 3.6.0 due to lack of time. Initial
support for glibc-2.13 has been added. A number of bugs causing
crashing or assertion failures have been fixed.
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (http://bugs.kde.org/enter_valgrind_bug.cgi) rather than
mailing the developers (or mailing lists) directly -- bugs that are
not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
188572 Valgrind on Mac should suppress setenv() mem leak
194402 vex amd64->IR: 0x48 0xF 0xAE 0x4 (proper FX{SAVE,RSTOR} support)
210481 vex amd64->IR: Assertion `sz == 2 || sz == 4' failed (REX.W POPQ)
246152 callgrind internal error after pthread_cancel on 32 Bit Linux
250038 ppc64: Altivec LVSR and LVSL instructions fail their regtest
254420 memory pool tracking broken
254957 Test code failing to compile due to changes in memcheck.h
255009 helgrind/drd: crash on chmod with invalid parameter
255130 readdwarf3.c parse_type_DIE confused by GNAT Ada types
255355 helgrind/drd: crash on threaded programs doing fork
255358 == 255355
255418 (SSE4.x) rint call compiled with ICC
255822 --gen-suppressions can create invalid files: "too many callers [...]"
255888 closing valgrindoutput tag outputted to log-stream on error
255963 (SSE4.x) vex amd64->IR: 0x66 0xF 0x3A 0x9 0xDB 0x0 (ROUNDPD)
255966 Slowness when using mempool annotations
256387 vex x86->IR: 0xD4 0xA 0x2 0x7 (AAD and AAM)
256600 super-optimized strcasecmp() false positive
256669 vex amd64->IR: Unhandled LOOPNEL insn on amd64
256968 (SSE4.x) vex amd64->IR: 0x66 0xF 0x38 0x10 0xD3 0x66 (BLENDVPx)
257011 (SSE4.x) vex amd64->IR: 0x66 0xF 0x3A 0xE 0xFD 0xA0 (PBLENDW)
257063 (SSE4.x) vex amd64->IR: 0x66 0xF 0x3A 0x8 0xC0 0x0 (ROUNDPS)
257276 Missing case in memcheck --track-origins=yes
258870 (SSE4.x) Add support for EXTRACTPS SSE 4.1 instruction
261966 (SSE4.x) support for CRC32B and CRC32Q is lacking (also CRC32{W,L})
262985 VEX regression in valgrind 3.6.0 in handling PowerPC VMX
262995 (SSE4.x) crash when trying to valgrind gcc-snapshot (PCMPxSTRx $0)
263099 callgrind_annotate counts Ir improperly [...]
263877 undefined coprocessor instruction on ARMv7
265964 configure FAIL with glibc-2.13
n-i-bz Fix compile error w/ icc-12.x in guest_arm_toIR.c
n-i-bz Docs: fix bogus descriptions for VALGRIND_CREATE_BLOCK et al
n-i-bz Massif: don't assert on shmat() with --pages-as-heap=yes
n-i-bz Bug fixes and major speedups for the exp-DHAT space profiler
n-i-bz DRD: disable --free-is-write due to implementation difficulties
(3.6.1: 16 February 2011, vex r2103, valgrind r11561).
Release 3.6.0 (21 October 2010)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.6.0 is a feature release with many significant improvements and the
usual collection of bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM/Linux, PPC32/Linux,
PPC64/Linux, X86/Darwin and AMD64/Darwin. Support for recent distros
and toolchain components (glibc 2.12, gcc 4.5, OSX 10.6) has been added.
-------------------------
Here are some highlights. Details are shown further down:
* Support for ARM/Linux.
* Support for recent Linux distros: Ubuntu 10.10 and Fedora 14.
* Support for Mac OS X 10.6, both 32- and 64-bit executables.
* Support for the SSE4.2 instruction set.
* Enhancements to the Callgrind profiler, including the ability to
handle CPUs with three levels of cache.
* A new experimental heap profiler, DHAT.
* A huge number of bug fixes and small enhancements.
-------------------------
Here are details of the above changes, together with descriptions of
many other changes, and a list of fixed bugs.
* ================== PLATFORM CHANGES =================
* Support for ARM/Linux. Valgrind now runs on ARMv7 capable CPUs
running Linux. It is known to work on Ubuntu 10.04, Ubuntu 10.10,
and Maemo 5, so you can run Valgrind on your Nokia N900 if you want.
This requires a CPU capable of running the ARMv7-A instruction set
(Cortex A5, A8 and A9). Valgrind provides fairly complete coverage
of the user space instruction set, including ARM and Thumb integer
code, VFPv3, NEON and V6 media instructions. The Memcheck,
Cachegrind and Massif tools work properly; other tools work to
varying degrees.
* Support for recent Linux distros (Ubuntu 10.10 and Fedora 14), along
with support for recent releases of the underlying toolchain
components, notably gcc-4.5 and glibc-2.12.
* Support for Mac OS X 10.6, both 32- and 64-bit executables. 64-bit
support also works much better on OS X 10.5, and is as solid as
32-bit support now.
* Support for the SSE4.2 instruction set. SSE4.2 is supported in
64-bit mode. In 32-bit mode, support is only available up to and
including SSSE3. Some exceptions: SSE4.2 AES instructions are not
supported in 64-bit mode, and 32-bit mode does in fact support the
bare minimum SSE4 instructions to needed to run programs on Mac OS X
10.6 on 32-bit targets.
* Support for IBM POWER6 cpus has been improved. The Power ISA up to
and including version 2.05 is supported.
* ==================== TOOL CHANGES ====================
* Cachegrind has a new processing script, cg_diff, which finds the
difference between two profiles. It's very useful for evaluating
the performance effects of a change in a program.
Related to this change, the meaning of cg_annotate's (rarely-used)
--threshold option has changed; this is unlikely to affect many
people, if you do use it please see the user manual for details.
* Callgrind now can do branch prediction simulation, similar to
Cachegrind. In addition, it optionally can count the number of
executed global bus events. Both can be used for a better
approximation of a "Cycle Estimation" as derived event (you need to
update the event formula in KCachegrind yourself).
* Cachegrind and Callgrind now refer to the LL (last-level) cache
rather than the L2 cache. This is to accommodate machines with
three levels of caches -- if Cachegrind/Callgrind auto-detects the
cache configuration of such a machine it will run the simulation as
if the L2 cache isn't present. This means the results are less
likely to match the true result for the machine, but
Cachegrind/Callgrind's results are already only approximate, and
should not be considered authoritative. The results are still
useful for giving a general idea about a program's locality.
* Massif has a new option, --pages-as-heap, which is disabled by
default. When enabled, instead of tracking allocations at the level
of heap blocks (as allocated with malloc/new/new[]), it instead
tracks memory allocations at the level of memory pages (as mapped by
mmap, brk, etc). Each mapped page is treated as its own block.
Interpreting the page-level output is harder than the heap-level
output, but this option is useful if you want to account for every
byte of memory used by a program.
* DRD has two new command-line options: --free-is-write and
--trace-alloc. The former allows to detect reading from already freed
memory, and the latter allows tracing of all memory allocations and
deallocations.
* DRD has several new annotations. Custom barrier implementations can
now be annotated, as well as benign races on static variables.
* DRD's happens before / happens after annotations have been made more
powerful, so that they can now also be used to annotate e.g. a smart
pointer implementation.
* Helgrind's annotation set has also been drastically improved, so as
to provide to users a general set of annotations to describe locks,
semaphores, barriers and condition variables. Annotations to
describe thread-safe reference counted heap objects have also been
added.
* Memcheck has a new command-line option, --show-possibly-lost, which
is enabled by default. When disabled, the leak detector will not
show possibly-lost blocks.
* A new experimental heap profiler, DHAT (Dynamic Heap Analysis Tool),
has been added. DHAT keeps track of allocated heap blocks, and also
inspects every memory reference to see which block (if any) is being
accessed. This gives a lot of insight into block lifetimes,
utilisation, turnover, liveness, and the location of hot and cold
fields. You can use DHAT to do hot-field profiling.
* ==================== OTHER CHANGES ====================
* Improved support for unfriendly self-modifying code: the extra
overhead incurred by --smc-check=all has been reduced by
approximately a factor of 5 as compared with 3.5.0.
* Ability to show directory names for source files in error messages.
This is combined with a flexible mechanism for specifying which
parts of the paths should be shown. This is enabled by the new flag
--fullpath-after.
* A new flag, --require-text-symbol, which will stop the run if a
specified symbol is not found it a given shared object when it is
loaded into the process. This makes advanced working with function
intercepting and wrapping safer and more reliable.
* Improved support for the Valkyrie GUI, version 2.0.0. GUI output
and control of Valgrind is now available for the tools Memcheck and
Helgrind. XML output from Valgrind is available for Memcheck,
Helgrind and exp-Ptrcheck.
* More reliable stack unwinding on amd64-linux, particularly in the
presence of function wrappers, and with gcc-4.5 compiled code.
* Modest scalability (performance improvements) for massive
long-running applications, particularly for those with huge amounts
of code.
* Support for analyzing programs running under Wine with has been
improved. The header files <valgrind/valgrind.h>,
<valgrind/memcheck.h> and <valgrind/drd.h> can now be used in
Windows-programs compiled with MinGW or one of the Microsoft Visual
Studio compilers.
* A rare but serious error in the 64-bit x86 CPU simulation was fixed.
The 32-bit simulator was not affected. This did not occur often,
but when it did would usually crash the program under test.
Bug 245925.
* A large number of bugs were fixed. These are shown below.
* A number of bugs were investigated, and were candidates for fixing,
but are not fixed in 3.6.0, due to lack of developer time. They may
get fixed in later releases. They are:
194402 vex amd64->IR: 0x48 0xF 0xAE 0x4 0x24 0x49 (FXSAVE64)
212419 false positive "lock order violated" (A+B vs A)
213685 Undefined value propagates past dependency breaking instruction
216837 Incorrect instrumentation of NSOperationQueue on Darwin
237920 valgrind segfault on fork failure
242137 support for code compiled by LLVM-2.8
242423 Another unknown Intel cache config value
243232 Inconsistent Lock Orderings report with trylock
243483 ppc: callgrind triggers VEX assertion failure
243935 Helgrind: implementation of ANNOTATE_HAPPENS_BEFORE() is wrong
244677 Helgrind crash hg_main.c:616 (map_threads_lookup): Assertion
'thr' failed.
246152 callgrind internal error after pthread_cancel on 32 Bit Linux
249435 Analyzing wine programs with callgrind triggers a crash
250038 ppc64: Altivec lvsr and lvsl instructions fail their regtest
250065 Handling large allocations
250101 huge "free" memory usage due to m_mallocfree.c
"superblocks fragmentation"
251569 vex amd64->IR: 0xF 0x1 0xF9 0x8B 0x4C 0x24 (RDTSCP)
252091 Callgrind on ARM does not detect function returns correctly
252600 [PATCH] Allow lhs to be a pointer for shl/shr
254420 memory pool tracking broken
n-i-bz support for adding symbols for JIT generated code
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (http://bugs.kde.org/enter_valgrind_bug.cgi) rather than
mailing the developers (or mailing lists) directly -- bugs that are
not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
135264 dcbzl instruction missing
142688 == 250799
153699 Valgrind should report unaligned reads with movdqa
180217 == 212335
190429 Valgrind reports lost of errors in ld.so
with x86_64 2.9.90 glibc
197266 valgrind appears to choke on the xmms instruction
"roundsd" on x86_64
197988 Crash when demangling very large symbol names
202315 unhandled syscall: 332 (inotify_init1)
203256 Add page-level profiling to Massif
205093 dsymutil=yes needs quotes, locking (partial fix)
205241 Snow Leopard 10.6 support (partial fix)
206600 Leak checker fails to upgrade indirect blocks when their
parent becomes reachable
210935 port valgrind.h (not valgrind) to win32 so apps run under
wine can make client requests
211410 vex amd64->IR: 0x15 0xFF 0xFF 0x0 0x0 0x89
within Linux ip-stack checksum functions
212335 unhandled instruction bytes: 0xF3 0xF 0xBD 0xC0
(lzcnt %eax,%eax)
213685 Undefined value propagates past dependency breaking instruction
(partial fix)
215914 Valgrind inserts bogus empty environment variable
217863 == 197988
219538 adjtimex syscall wrapper wrong in readonly adjtime mode
222545 shmat fails under valgind on some arm targets
222560 ARM NEON support
230407 == 202315
231076 == 202315
232509 Docs build fails with formatting inside <title></title> elements
232793 == 202315
235642 [PATCH] syswrap-linux.c: support evdev EVIOCG* ioctls
236546 vex x86->IR: 0x66 0xF 0x3A 0xA
237202 vex amd64->IR: 0xF3 0xF 0xB8 0xC0 0x49 0x3B
237371 better support for VALGRIND_MALLOCLIKE_BLOCK
237485 symlink (syscall 57) is not supported on Mac OS
237723 sysno == 101 exp-ptrcheck: the 'impossible' happened:
unhandled syscall
238208 is_just_below_ESP doesn't take into account red-zone
238345 valgrind passes wrong $0 when executing a shell script
238679 mq_timedreceive syscall doesn't flag the reception buffer
as "defined"
238696 fcntl command F_DUPFD_CLOEXEC not supported
238713 unhandled instruction bytes: 0x66 0xF 0x29 0xC6
238713 unhandled instruction bytes: 0x66 0xF 0x29 0xC6
238745 3.5.0 Make fails on PPC Altivec opcodes, though configure
says "Altivec off"
239992 vex amd64->IR: 0x48 0xF 0xC4 0xC1 0x0 0x48
240488 == 197988
240639 == 212335
241377 == 236546
241903 == 202315
241920 == 212335
242606 unhandled syscall: setegid (in Ptrcheck)
242814 Helgrind "Impossible has happened" during
QApplication::initInstance();
243064 Valgrind attempting to read debug information from iso
243270 Make stack unwinding in Valgrind wrappers more reliable
243884 exp-ptrcheck: the 'impossible happened: unhandled syscall
sysno = 277 (mq_open)
244009 exp-ptrcheck unknown syscalls in analyzing lighttpd
244493 ARM VFP d16-d31 registers support
244670 add support for audit_session_self syscall on Mac OS 10.6
244921 The xml report of helgrind tool is not well format
244923 In the xml report file, the <preamble> not escape the
xml char, eg '<','&','>'
245535 print full path names in plain text reports
245925 x86-64 red zone handling problem
246258 Valgrind not catching integer underruns + new [] s
246311 reg/reg cmpxchg doesn't work on amd64
246549 unhandled syscall unix:277 while testing 32-bit Darwin app
246888 Improve Makefile.vex.am
247510 [OS X 10.6] Memcheck reports unaddressable bytes passed
to [f]chmod_extended
247526 IBM POWER6 (ISA 2.05) support is incomplete
247561 Some leak testcases fails due to reachable addresses in
caller save regs
247875 sizeofIRType to handle Ity_I128
247894 [PATCH] unhandled syscall sys_readahead
247980 Doesn't honor CFLAGS passed to configure
248373 darwin10.supp is empty in the trunk
248822 Linux FIBMAP ioctl has int parameter instead of long
248893 [PATCH] make readdwarf.c big endianess safe to enable
unwinding on big endian systems
249224 Syscall 336 not supported (SYS_proc_info)
249359 == 245535
249775 Incorrect scheme for detecting NEON capabilities of host CPU
249943 jni JVM init fails when using valgrind
249991 Valgrind incorrectly declares AESKEYGENASSIST support
since VEX r2011
249996 linux/arm: unhandled syscall: 181 (__NR_pwrite64)
250799 frexp$fenv_access_off function generates SIGILL
250998 vex x86->IR: unhandled instruction bytes: 0x66 0x66 0x66 0x2E
251251 support pclmulqdq insn
251362 valgrind: ARM: attach to debugger either fails or provokes
kernel oops
251674 Unhandled syscall 294
251818 == 254550
254257 Add support for debugfiles found by build-id
254550 [PATCH] Implement DW_ATE_UTF (DWARF4)
254646 Wrapped functions cause stack misalignment on OS X
(and possibly Linux)
254556 ARM: valgrinding anything fails with SIGSEGV for 0xFFFF0FA0
(3.6.0: 21 October 2010, vex r2068, valgrind r11471).
Release 3.5.0 (19 August 2009)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.5.0 is a feature release with many significant improvements and the
usual collection of bug fixes. The main improvement is that Valgrind
now works on Mac OS X.
This release supports X86/Linux, AMD64/Linux, PPC32/Linux, PPC64/Linux
and X86/Darwin. Support for recent distros and toolchain components
(glibc 2.10, gcc 4.5) has been added.
-------------------------
Here is a short summary of the changes. Details are shown further
down:
* Support for Mac OS X (10.5.x).
* Improvements and simplifications to Memcheck's leak checker.
* Clarification and simplifications in various aspects of Valgrind's
text output.
* XML output for Helgrind and Ptrcheck.
* Performance and stability improvements for Helgrind and DRD.
* Genuinely atomic support for x86/amd64/ppc atomic instructions.
* A new experimental tool, BBV, useful for computer architecture
research.
* Improved Wine support, including ability to read Windows PDB
debuginfo.
-------------------------
Here are details of the above changes, followed by descriptions of
many other minor changes, and a list of fixed bugs.
* Valgrind now runs on Mac OS X. (Note that Mac OS X is sometimes
called "Darwin" because that is the name of the OS core, which is the
level that Valgrind works at.)
Supported systems:
- It requires OS 10.5.x (Leopard). Porting to 10.4.x is not planned
because it would require work and 10.4 is only becoming less common.
- 32-bit programs on x86 and AMD64 (a.k.a x86-64) machines are supported
fairly well. For 10.5.x, 32-bit programs are the default even on
64-bit machines, so it handles most current programs.
- 64-bit programs on x86 and AMD64 (a.k.a x86-64) machines are not
officially supported, but simple programs at least will probably work.
However, start-up is slow.
- PowerPC machines are not supported.
Things that don't work:
- The Ptrcheck tool.
- Objective-C garbage collection.
- --db-attach=yes.
- If you have Rogue Amoeba's "Instant Hijack" program installed,
Valgrind will fail with a SIGTRAP at start-up. See
https://bugs.kde.org/show_bug.cgi?id=193917 for details and a
simple work-around.
Usage notes:
- You will likely find --dsymutil=yes a useful option, as error
messages may be imprecise without it.
- Mac OS X support is new and therefore will be less robust than the
Linux support. Please report any bugs you find.
- Threaded programs may run more slowly than on Linux.
Many thanks to Greg Parker for developing this port over several years.
* Memcheck's leak checker has been improved.
- The results for --leak-check=summary now match the summary results
for --leak-check=full. Previously they could differ because
--leak-check=summary counted "indirectly lost" blocks and
"suppressed" blocks as "definitely lost".
- Blocks that are only reachable via at least one interior-pointer,
but are directly pointed to by a start-pointer, were previously
marked as "still reachable". They are now correctly marked as
"possibly lost".
- The default value for the --leak-resolution option has been
changed from "low" to "high". In general, this means that more
leak reports will be produced, but each leak report will describe
fewer leaked blocks.
- With --leak-check=full, "definitely lost" and "possibly lost"
leaks are now considered as proper errors, ie. they are counted
for the "ERROR SUMMARY" and affect the behaviour of
--error-exitcode. These leaks are not counted as errors if
--leak-check=summary is specified, however.
- Documentation for the leak checker has been improved.
* Various aspects of Valgrind's text output have changed.
- Valgrind's start-up message has changed. It is shorter but also
includes the command being run, which makes it easier to use
--trace-children=yes. An example:
- Valgrind's shut-down messages have also changed. This is most
noticeable with Memcheck, where the leak summary now occurs before
the error summary. This change was necessary to allow leaks to be
counted as proper errors (see the description of the leak checker
changes above for more details). This was also necessary to fix a
longstanding bug in which uses of suppressions against leaks were
not "counted", leading to difficulties in maintaining suppression
files (see https://bugs.kde.org/show_bug.cgi?id=186790).
- Behavior of -v has changed. In previous versions, -v printed out
a mixture of marginally-user-useful information, and tool/core
statistics. The statistics printing has now been moved to its own
flag, --stats=yes. This means -v is less verbose and more likely
to convey useful end-user information.
- The format of some (non-XML) stack trace entries has changed a
little. Previously there were six possible forms:
0x80483BF: really (a.c:20)
0x80483BF: really (in /foo/a.out)
0x80483BF: really
0x80483BF: (within /foo/a.out)
0x80483BF: ??? (a.c:20)
0x80483BF: ???
The third and fourth of these forms have been made more consistent
with the others. The six possible forms are now:
0x80483BF: really (a.c:20)
0x80483BF: really (in /foo/a.out)
0x80483BF: really (in ???)
0x80483BF: ??? (in /foo/a.out)
0x80483BF: ??? (a.c:20)
0x80483BF: ???
Stack traces produced when --xml=yes is specified are different
and unchanged.
* Helgrind and Ptrcheck now support XML output, so they can be used
from GUI tools. Also, the XML output mechanism has been
overhauled.
- The XML format has been overhauled and generalised, so it is more
suitable for error reporting tools in general. The Memcheck
specific aspects of it have been removed. The new format, which
is an evolution of the old format, is described in
docs/internals/xml-output-protocol4.txt.
- Memcheck has been updated to use the new format.
- Helgrind and Ptrcheck are now able to emit output in this format.
- The XML output mechanism has been overhauled. XML is now output
to its own file descriptor, which means that:
* Valgrind can output text and XML independently.
* The longstanding problem of XML output being corrupted by
unexpected un-tagged text messages is solved.
As before, the destination for text output is specified using
--log-file=, --log-fd= or --log-socket=.
As before, XML output for a tool is enabled using --xml=yes.
Because there's a new XML output channel, the XML output
destination is now specified by --xml-file=, --xml-fd= or
--xml-socket=.
Initial feedback has shown this causes some confusion. To
clarify, the two envisaged usage scenarios are:
(1) Normal text output. In this case, do not specify --xml=yes
nor any of --xml-file=, --xml-fd= or --xml-socket=.
(2) XML output. In this case, specify --xml=yes, and one of
--xml-file=, --xml-fd= or --xml-socket= to select the XML
destination, one of --log-file=, --log-fd= or --log-socket=
to select the destination for any remaining text messages,
and, importantly, -q.
-q makes Valgrind completely silent on the text channel,
except in the case of critical failures, such as Valgrind
itself segfaulting, or failing to read debugging information.
Hence, in this scenario, it suffices to check whether or not
any output appeared on the text channel. If yes, then it is
likely to be a critical error which should be brought to the
attention of the user. If no (the text channel produced no
output) then it can be assumed that the run was successful.
This allows GUIs to make the critical distinction they need to
make (did the run fail or not?) without having to search or
filter the text output channel in any way.
It is also recommended to use --child-silent-after-fork=yes in
scenario (2).
* Improvements and changes in Helgrind:
- XML output, as described above
- Checks for consistent association between pthread condition
variables and their associated mutexes are now performed.
- pthread_spinlock functions are supported.
- Modest performance improvements.
- Initial (skeletal) support for describing the behaviour of
non-POSIX synchronisation objects through ThreadSanitizer
compatible ANNOTATE_* macros.
- More controllable tradeoffs between performance and the level of
detail of "previous" accesses in a race. There are now three
settings:
* --history-level=full. This is the default, and was also the
default in 3.4.x. It shows both stacks involved in a race, but
requires a lot of memory and can be very slow in programs that
do many inter-thread synchronisation events.
* --history-level=none. This only shows the later stack involved
in a race. This can be much faster than --history-level=full,
but makes it much more difficult to find the other access
involved in the race.
The new intermediate setting is
* --history-level=approx
For the earlier (other) access, two stacks are presented. The
earlier access is guaranteed to be somewhere in between the two
program points denoted by those stacks. This is not as useful
as showing the exact stack for the previous access (as per
--history-level=full), but it is better than nothing, and it's
almost as fast as --history-level=none.
* New features and improvements in DRD:
- The error messages printed by DRD are now easier to interpret.
Instead of using two different numbers to identify each thread
(Valgrind thread ID and DRD thread ID), DRD does now identify
threads via a single number (the DRD thread ID). Furthermore
"first observed at" information is now printed for all error
messages related to synchronization objects.
- Added support for named semaphores (sem_open() and sem_close()).
- Race conditions between pthread_barrier_wait() and
pthread_barrier_destroy() calls are now reported.
- Added support for custom allocators through the macros
VALGRIND_MALLOCLIKE_BLOCK() VALGRIND_FREELIKE_BLOCK() (defined in
in <valgrind/valgrind.h>). An alternative for these two macros is
the new client request VG_USERREQ__DRD_CLEAN_MEMORY (defined in
<valgrind/drd.h>).
- Added support for annotating non-POSIX synchronization objects
through several new ANNOTATE_*() macros.
- OpenMP: added support for the OpenMP runtime (libgomp) included
with gcc versions 4.3.0 and 4.4.0.
- Faster operation.
- Added two new command-line options (--first-race-only and
--segment-merging-interval).
* Genuinely atomic support for x86/amd64/ppc atomic instructions
Valgrind will now preserve (memory-access) atomicity of LOCK-
prefixed x86/amd64 instructions, and any others implying a global
bus lock. Ditto for PowerPC l{w,d}arx/st{w,d}cx. instructions.
This means that Valgrinded processes will "play nicely" in
situations where communication with other processes, or the kernel,
is done through shared memory and coordinated with such atomic
instructions. Prior to this change, such arrangements usually
resulted in hangs, races or other synchronisation failures, because
Valgrind did not honour atomicity of such instructions.
* A new experimental tool, BBV, has been added. BBV generates basic
block vectors for use with the SimPoint analysis tool, which allows
a program's overall behaviour to be approximated by running only a
fraction of it. This is useful for computer architecture
researchers. You can run BBV by specifying --tool=exp-bbv (the
"exp-" prefix is short for "experimental"). BBV was written by
Vince Weaver.
* Modestly improved support for running Windows applications under
Wine. In particular, initial support for reading Windows .PDB debug
information has been added.
* A new Memcheck client request VALGRIND_COUNT_LEAK_BLOCKS has been
added. It is similar to VALGRIND_COUNT_LEAKS but counts blocks
instead of bytes.
* The Valgrind client requests VALGRIND_PRINTF and
VALGRIND_PRINTF_BACKTRACE have been changed slightly. Previously,
the string was always printed immediately on its own line. Now, the
string will be added to a buffer but not printed until a newline is
encountered, or other Valgrind output is printed (note that for
VALGRIND_PRINTF_BACKTRACE, the back-trace itself is considered
"other Valgrind output"). This allows you to use multiple
VALGRIND_PRINTF calls to build up a single output line, and also to
print multiple output lines with a single request (by embedding
multiple newlines in the string).
* The graphs drawn by Massif's ms_print program have changed slightly:
- The half-height chars '.' and ',' are no longer drawn, because
they are confusing. The --y option can be used if the default
y-resolution is not high enough.
- Horizontal lines are now drawn after the top of a snapshot if
there is a gap until the next snapshot. This makes it clear that
the memory usage has not dropped to zero between snapshots.
* Something that happened in 3.4.0, but wasn't clearly announced: the
option --read-var-info=yes can be used by some tools (Memcheck,
Helgrind and DRD). When enabled, it causes Valgrind to read DWARF3
variable type and location information. This makes those tools
start up more slowly and increases memory consumption, but
descriptions of data addresses in error messages become more
detailed.
* exp-Omega, an experimental instantaneous leak-detecting tool, was
disabled in 3.4.0 due to a lack of interest and maintenance,
although the source code was still in the distribution. The source
code has now been removed from the distribution. For anyone
interested, the removal occurred in SVN revision r10247.
* Some changes have been made to the build system.
- VEX/ is now integrated properly into the build system. This means
that dependency tracking within VEX/ now works properly, "make
install" will work without requiring "make" before it, and
parallel builds (ie. 'make -j') now work (previously a
.NOTPARALLEL directive was used to serialize builds, ie. 'make -j'
was effectively ignored).
- The --with-vex configure option has been removed. It was of
little use and removing it simplified the build system.
- The location of some install files has changed. This should not
affect most users. Those who might be affected:
* For people who use Valgrind with MPI programs, the installed
libmpiwrap.so library has moved from
$(INSTALL)/<platform>/libmpiwrap.so to
$(INSTALL)/libmpiwrap-<platform>.so.
* For people who distribute standalone Valgrind tools, the
installed libraries such as $(INSTALL)/<platform>/libcoregrind.a
have moved to $(INSTALL)/libcoregrind-<platform>.a.
These changes simplify the build system.
- Previously, all the distributed suppression (*.supp) files were
installed. Now, only default.supp is installed. This should not
affect users as the other installed suppression files were not
read; the fact that they were installed was a mistake.
* KNOWN LIMITATIONS:
- Memcheck is unusable with the Intel compiler suite version 11.1,
when it generates code for SSE2-and-above capable targets. This
is because of icc's use of highly optimised inlined strlen
implementations. It causes Memcheck to report huge numbers of
false errors even in simple programs. Helgrind and DRD may also
have problems.
Versions 11.0 and earlier may be OK, but this has not been
properly tested.
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (http://bugs.kde.org/enter_valgrind_bug.cgi) rather than
mailing the developers (or mailing lists) directly -- bugs that are
not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
84303 How about a LockCheck tool?
91633 dereference of null ptr in vgPlain_st_basetype
97452 Valgrind doesn't report any pthreads problems
100628 leak-check gets assertion failure when using
VALGRIND_MALLOCLIKE_BLOCK on malloc()ed memory
108528 NPTL pthread cleanup handlers not called
110126 Valgrind 2.4.1 configure.in tramples CFLAGS
110128 mallinfo is not implemented...
110770 VEX: Generated files not always updated when making valgrind
111102 Memcheck: problems with large (memory footprint) applications
115673 Vex's decoder should never assert
117564 False positive: Syscall param clone(child_tidptr) contains
uninitialised byte(s)
119404 executing ssh from inside valgrind fails
133679 Callgrind does not write path names to sources with dwarf debug
info
135847 configure.in problem with non gnu compilers (and possible fix)
136154 threads.c:273 (vgCallgrind_post_signal): Assertion
'*(vgCallgrind_current_fn_stack.top) == 0' failed.
136230 memcheck reports "possibly lost", should be "still reachable"
137073 NULL arg to MALLOCLIKE_BLOCK causes crash
137904 Valgrind reports a memory leak when using POSIX threads,
while it shouldn't
139076 valgrind VT_GETSTATE error
142228 complaint of elf_dynamic_do_rela in trivial usage
145347 spurious warning with USBDEVFS_REAPURB
148441 (wine) can't find memory leak in Wine, win32 binary
executable file.
148742 Leak-check fails assert on exit
149878 add (proper) check for calloc integer overflow
150606 Call graph is broken when using callgrind control
152393 leak errors produce an exit code of 0. I need some way to
cause leak errors to result in a nonzero exit code.
157154 documentation (leak-resolution doc speaks about num-callers
def=4) + what is a loss record
159501 incorrect handling of ALSA ioctls
162020 Valgrinding an empty/zero-byte file crashes valgrind
162482 ppc: Valgrind crashes while reading stabs information
162718 x86: avoid segment selector 0 in sys_set_thread_area()
163253 (wine) canonicaliseSymtab forgot some fields in DiSym
163560 VEX/test_main.c is missing from valgrind-3.3.1
164353 malloc_usable_size() doesn't return a usable size
165468 Inconsistent formatting in memcheck manual -- please fix
169505 main.c:286 (endOfInstr):
Assertion 'ii->cost_offset == *cost_offset' failed
177206 Generate default.supp during compile instead of configure
177209 Configure valt_load_address based on arch+os
177305 eventfd / syscall 323 patch lost
179731 Tests fail to build because of inlining of non-local asm labels
181394 helgrind: libhb_core.c:3762 (msm_write): Assertion
'ordxx == POrd_EQ || ordxx == POrd_LT' failed.
181594 Bogus warning for empty text segment
181707 dwarf doesn't require enumerations to have name
185038 exp-ptrcheck: "unhandled syscall: 285" (fallocate) on x86_64
185050 exp-ptrcheck: sg_main.c:727 (add_block_to_GlobalTree):
Assertion '!already_present' failed.
185359 exp-ptrcheck: unhandled syscall getresuid()
185794 "WARNING: unhandled syscall: 285" (fallocate) on x86_64
185816 Valgrind is unable to handle debug info for files with split
debug info that are prelinked afterwards
185980 [darwin] unhandled syscall: sem_open
186238 bbToIR_AMD64: disInstr miscalculated next %rip
186507 exp-ptrcheck unhandled syscalls prctl, etc.
186790 Suppression pattern used for leaks are not reported
186796 Symbols with length>200 in suppression files are ignored
187048 drd: mutex PTHREAD_PROCESS_SHARED attribute missinterpretation
187416 exp-ptrcheck: support for __NR_{setregid,setreuid,setresuid}
188038 helgrind: hg_main.c:926: mk_SHVAL_fail: the 'impossible' happened
188046 bashisms in the configure script
188127 amd64->IR: unhandled instruction bytes: 0xF0 0xF 0xB0 0xA
188161 memcheck: --track-origins=yes asserts "mc_machine.c:672
(get_otrack_shadow_offset_wrk): the 'impossible' happened."
188248 helgrind: pthread_cleanup_push, pthread_rwlock_unlock,
assertion fail "!lock->heldBy"
188427 Add support for epoll_create1 (with patch)
188530 Support for SIOCGSTAMPNS
188560 Include valgrind.spec in the tarball
188572 Valgrind on Mac should suppress setenv() mem leak
189054 Valgrind fails to build because of duplicate non-local asm labels
189737 vex amd64->IR: unhandled instruction bytes: 0xAC
189762 epoll_create syscall not handled (--tool=exp-ptrcheck)
189763 drd assertion failure: s_threadinfo[tid].is_recording
190219 unhandled syscall: 328 (x86-linux)
190391 dup of 181394; see above
190429 Valgrind reports lots of errors in ld.so with x86_64 2.9.90 glibc
190820 No debug information on powerpc-linux
191095 PATCH: Improve usbdevfs ioctl handling
191182 memcheck: VALGRIND_LEAK_CHECK quadratic when big nr of chunks
or big nr of errors
191189 --xml=yes should obey --gen-suppressions=all
191192 syslog() needs a suppression on macosx
191271 DARWIN: WARNING: unhandled syscall: 33554697 a.k.a.: 265
191761 getrlimit on MacOSX
191992 multiple --fn-skip only works sometimes; dependent on order
192634 V. reports "aspacem sync_check_mapping_callback:
segment mismatch" on Darwin
192954 __extension__ missing on 2 client requests
194429 Crash at start-up with glibc-2.10.1 and linux-2.6.29
194474 "INSTALL" file has different build instructions than "README"
194671 Unhandled syscall (sem_wait?) from mac valgrind
195069 memcheck: reports leak (memory still reachable) for
printf("%d', x)
195169 drd: (vgDrd_barrier_post_wait):
Assertion 'r->sg[p->post_iteration]' failed.
195268 valgrind --log-file doesn't accept ~/...
195838 VEX abort: LibVEX_N_SPILL_BYTES too small for CPUID boilerplate
195860 WARNING: unhandled syscall: unix:223
196528 need a error suppression for pthread_rwlock_init under os x?
197227 Support aio_* syscalls on Darwin
197456 valgrind should reject --suppressions=(directory)
197512 DWARF2 CFI reader: unhandled CFI instruction 0:10
197591 unhandled syscall 27 (mincore)
197793 Merge DCAS branch to the trunk == 85756, 142103
197794 Avoid duplicate filenames in Vex
197898 make check fails on current SVN
197901 make check fails also under exp-ptrcheck in current SVN
197929 Make --leak-resolution=high the default
197930 Reduce spacing between leak reports
197933 Print command line of client at start-up, and shorten preamble
197966 unhandled syscall 205 (x86-linux, --tool=exp-ptrcheck)
198395 add BBV to the distribution as an experimental tool
198624 Missing syscalls on Darwin: 82, 167, 281, 347
198649 callgrind_annotate doesn't cumulate counters
199338 callgrind_annotate sorting/thresholds are broken for all but Ir
199977 Valgrind complains about an unrecognized instruction in the
atomic_incs test program
200029 valgrind isn't able to read Fedora 12 debuginfo
200760 darwin unhandled syscall: unix:284
200827 DRD doesn't work on Mac OS X
200990 VG_(read_millisecond_timer)() does not work correctly
201016 Valgrind does not support pthread_kill() on Mac OS
201169 Document --read-var-info
201323 Pre-3.5.0 performance sanity checking
201384 Review user manual for the 3.5.0 release
201585 mfpvr not implemented on ppc
201708 tests failing because x86 direction flag is left set
201757 Valgrind doesn't handle any recent sys_futex additions
204377 64-bit valgrind can not start a shell script
(with #!/path/to/shell) if the shell is a 32-bit executable
n-i-bz drd: fixed assertion failure triggered by mutex reinitialization.
n-i-bz drd: fixed a bug that caused incorrect messages to be printed
about memory allocation events with memory access tracing enabled
n-i-bz drd: fixed a memory leak triggered by vector clock deallocation
(3.5.0: 19 Aug 2009, vex r1913, valgrind r10846).
Release 3.4.1 (28 February 2009)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.4.1 is a bug-fix release that fixes some regressions and assertion
failures in debug info reading in 3.4.0, most notably incorrect stack
traces on amd64-linux on older (glibc-2.3 based) systems. Various
other debug info problems are also fixed. A number of bugs in the
exp-ptrcheck tool introduced in 3.4.0 have been fixed.
In view of the fact that 3.4.0 contains user-visible regressions
relative to 3.3.x, upgrading to 3.4.1 is recommended. Packagers are
encouraged to ship 3.4.1 in preference to 3.4.0.
The fixed bugs are as follows. Note that "n-i-bz" stands for "not in
bugzilla" -- that is, a bug that was reported to us but never got a
bugzilla entry. We encourage you to file bugs in bugzilla
(http://bugs.kde.org/enter_valgrind_bug.cgi) rather than mailing the
developers (or mailing lists) directly -- bugs that are not entered
into bugzilla tend to get forgotten about or ignored.
n-i-bz Fix various bugs reading icc-11 generated debug info
n-i-bz Fix various bugs reading gcc-4.4 generated debug info
n-i-bz Preliminary support for glibc-2.10 / Fedora 11
n-i-bz Cachegrind and Callgrind: handle non-power-of-two cache sizes,
so as to support (eg) 24k Atom D1 and Core2 with 3/6/12MB L2.
179618 exp-ptrcheck crashed / exit prematurely
179624 helgrind: false positive races with pthread_create and
recv/open/close/read
134207 pkg-config output contains @VG_PLATFORM@
176926 floating point exception at valgrind startup with PPC 440EPX
181594 Bogus warning for empty text segment
173751 amd64->IR: 0x48 0xF 0x6F 0x45 (even more redundant rex prefixes)
181707 Dwarf3 doesn't require enumerations to have name
185038 exp-ptrcheck: "unhandled syscall: 285" (fallocate) on x86_64
185050 exp-ptrcheck: sg_main.c:727 (add_block_to_GlobalTree):
Assertion '!already_present' failed.
185359 exp-ptrcheck unhandled syscall getresuid()
(3.4.1.RC1: 24 Feb 2008, vex r1884, valgrind r9253).
(3.4.1: 28 Feb 2008, vex r1884, valgrind r9293).
Release 3.4.0 (2 January 2009)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.4.0 is a feature release with many significant improvements and the
usual collection of bug fixes. This release supports X86/Linux,
AMD64/Linux, PPC32/Linux and PPC64/Linux. Support for recent distros
(using gcc 4.4, glibc 2.8 and 2.9) has been added.
3.4.0 brings some significant tool improvements. Memcheck can now
report the origin of uninitialised values, the thread checkers
Helgrind and DRD are much improved, and we have a new experimental
tool, exp-Ptrcheck, which is able to detect overruns of stack and
global arrays. In detail:
* Memcheck is now able to track the origin of uninitialised values.
When it reports an uninitialised value error, it will try to show
the origin of the value, as either a heap or stack allocation.
Origin tracking is expensive and so is not enabled by default. To
use it, specify --track-origins=yes. Memcheck's speed will be
essentially halved, and memory usage will be significantly
increased. Nevertheless it can drastically reduce the effort
required to identify the root cause of uninitialised value errors,
and so is often a programmer productivity win, despite running more
slowly.
* A version (1.4.0) of the Valkyrie GUI, that works with Memcheck in
3.4.0, will be released shortly.
* Helgrind's race detection algorithm has been completely redesigned
and reimplemented, to address usability and scalability concerns:
- The new algorithm has a lower false-error rate: it is much less
likely to report races that do not really exist.
- Helgrind will display full call stacks for both accesses involved
in a race. This makes it easier to identify the root causes of
races.
- Limitations on the size of program that can run have been removed.
- Performance has been modestly improved, although that is very
workload-dependent.
- Direct support for Qt4 threading has been added.
- pthread_barriers are now directly supported.
- Helgrind works well on all supported Linux targets.
* The DRD thread debugging tool has seen major improvements:
- Greatly improved performance and significantly reduced memory
usage.
- Support for several major threading libraries (Boost.Thread, Qt4,
glib, OpenMP) has been added.
- Support for atomic instructions, POSIX semaphores, barriers and
reader-writer locks has been added.
- Works now on PowerPC CPUs too.
- Added support for printing thread stack usage at thread exit time.
- Added support for debugging lock contention.
- Added a manual for Drd.
* A new experimental tool, exp-Ptrcheck, has been added. Ptrcheck
checks for misuses of pointers. In that sense it is a bit like
Memcheck. However, Ptrcheck can do things Memcheck can't: it can
detect overruns of stack and global arrays, it can detect
arbitrarily far out-of-bounds accesses to heap blocks, and it can
detect accesses heap blocks that have been freed a very long time
ago (millions of blocks in the past).
Ptrcheck currently works only on x86-linux and amd64-linux. To use
it, use --tool=exp-ptrcheck. A simple manual is provided, as part
of the main Valgrind documentation. As this is an experimental
tool, we would be particularly interested in hearing about your
experiences with it.
* exp-Omega, an experimental instantaneous leak-detecting tool, is no
longer built by default, although the code remains in the repository
and the tarball. This is due to three factors: a perceived lack of
users, a lack of maintenance, and concerns that it may not be
possible to achieve reliable operation using the existing design.
* As usual, support for the latest Linux distros and toolchain
components has been added. It should work well on Fedora Core 10,
OpenSUSE 11.1 and Ubuntu 8.10. gcc-4.4 (in its current pre-release
state) is supported, as is glibc-2.9. The C++ demangler has been
updated so as to work well with C++ compiled by even the most recent
g++'s.
* You can now use frame-level wildcards in suppressions. This was a
frequently-requested enhancement. A line "..." in a suppression now
matches zero or more frames. This makes it easier to write
suppressions which are precise yet insensitive to changes in
inlining behaviour.
* 3.4.0 adds support on x86/amd64 for the SSSE3 instruction set.
* Very basic support for IBM Power6 has been added (64-bit processes only).
* Valgrind is now cross-compilable. For example, it is possible to
cross compile Valgrind on an x86/amd64-linux host, so that it runs
on a ppc32/64-linux target.
* You can set the main thread's stack size at startup using the
new --main-stacksize= flag (subject of course to ulimit settings).
This is useful for running apps that need a lot of stack space.
* The limitation that you can't use --trace-children=yes together
with --db-attach=yes has been removed.
* The following bugs have been fixed. Note that "n-i-bz" stands for
"not in bugzilla" -- that is, a bug that was reported to us but
never got a bugzilla entry. We encourage you to file bugs in
bugzilla (http://bugs.kde.org/enter_valgrind_bug.cgi) rather than
mailing the developers (or mailing lists) directly.
n-i-bz Make return types for some client requests 64-bit clean
n-i-bz glibc 2.9 support
n-i-bz ignore unsafe .valgrindrc's (CVE-2008-4865)
n-i-bz MPI_Init(0,0) is valid but libmpiwrap.c segfaults
n-i-bz Building in an env without gdb gives bogus gdb attach
92456 Tracing the origin of uninitialised memory
106497 Valgrind does not demangle some C++ template symbols
162222 ==106497
151612 Suppression with "..." (frame-level wildcards in .supp files)
156404 Unable to start oocalc under memcheck on openSUSE 10.3 (64-bit)
159285 unhandled syscall:25 (stime, on x86-linux)
159452 unhandled ioctl 0x8B01 on "valgrind iwconfig"
160954 ppc build of valgrind crashes with illegal instruction (isel)
160956 mallinfo implementation, w/ patch
162092 Valgrind fails to start gnome-system-monitor
162819 malloc_free_fill test doesn't pass on glibc2.8 x86
163794 assertion failure with "--track-origins=yes"
163933 sigcontext.err and .trapno must be set together
163955 remove constraint !(--db-attach=yes && --trace-children=yes)
164476 Missing kernel module loading system calls
164669 SVN regression: mmap() drops posix file locks
166581 Callgrind output corruption when program forks
167288 Patch file for missing system calls on Cell BE
168943 unsupported scas instruction pentium
171645 Unrecognised instruction (MOVSD, non-binutils encoding)
172417 x86->IR: 0x82 ...
172563 amd64->IR: 0xD9 0xF5 - fprem1
173099 .lds linker script generation error
173177 [x86_64] syscalls: 125/126/179 (capget/capset/quotactl)
173751 amd64->IR: 0x48 0xF 0x6F 0x45 (even more redundant prefixes)
174532 == 173751
174908 --log-file value not expanded correctly for core file
175044 Add lookup_dcookie for amd64
175150 x86->IR: 0xF2 0xF 0x11 0xC1 (movss non-binutils encoding)
Developer-visible changes:
* Valgrind's debug-info reading machinery has been majorly overhauled.
It can now correctly establish the addresses for ELF data symbols,
which is something that has never worked properly before now.
Also, Valgrind can now read DWARF3 type and location information for
stack and global variables. This makes it possible to use the
framework to build tools that rely on knowing the type and locations
of stack and global variables, for example exp-Ptrcheck.
Reading of such information is disabled by default, because most
tools don't need it, and because it is expensive in space and time.
However, you can force Valgrind to read it, using the
--read-var-info=yes flag. Memcheck, Helgrind and DRD are able to
make use of such information, if present, to provide source-level
descriptions of data addresses in the error messages they create.
(3.4.0.RC1: 24 Dec 2008, vex r1878, valgrind r8882).
(3.4.0: 3 Jan 2009, vex r1878, valgrind r8899).
