2. NEWS Valgrind Distribution Documents 2. NEWS



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

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



(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 mergin