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NEWS
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Release 3.11.0 (?? ????????? 201?)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Release 3.11.0 is under development, not yet released.
* ================== PLATFORM CHANGES =================
* s390x: It is now required for the host to have the long displacement
facility. The oldest supported machine model is z990.
* ==================== TOOL CHANGES ====================
* Memcheck:
* Massif:
New monitor command 'all_snapshots <filename>' that dumps all snapshots
taken so far.
* Helgrind:
* Callgrind:
* ==================== OTHER CHANGES ====================
* 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.
* 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 mixing valgrind
errors with program output.
* 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.
* New Option --valgrind-stacksize=<number> can be used to change
the size of the private thread stacks used by Valgrind.
Useful to reduce memory use or increase the stack size if Valgrind
segfaults due to stack exhausted.
* New Option --avg-transtab-entry-size=<number> can be used to tune
the size of the translation table sectors, either to gain memory
or to avoid too many retranslations.
* Valgrind can be built with Intel's ICC compiler. The required
compiler version is 14.0 or later.
* ==================== 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
201435 Fix Darwin: -v does not show kernel version
211926 Avoid compilation warnings in valgrind.h with -pedantic
226609 Crediting upstream authors in man page
231257 Valgrind omits path when executing script from shebang line
269360 s390x: Fix addressing mode selection for compare-and-swap
333051 mmap of huge pages fails due to incorrect alignment
== 339163
334802 valgrind does not always explain why a given option is bad
335785 amd64->IR 0xC4 0xE2 0x75 0x2F (vmaskmovpd)
== 307399
== 343175
== 342740
335907 segfault when running wine's ddrawex/tests/surface.c under valgrind
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
339288 support Cavium Octeon MIPS specific BBIT*32 instructions
339442 Fix testsuite build failure on OS X 10.9
339542 Enable compilation with Intel's ICC compiler
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
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
340115 Fix none/tests/cmdline[1|2] tests on systems which define TMPDIR
340430 Fix some grammatical weirdness in the manual.
341238 Recognize GCC5/DWARFv5 DW_LANG constants (Go, C11, C++11, C++14)
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
when dest register = source register
341789 aarch64: shmat fails with valgrind on ARMv8
342038 Unhandled syscalls on aarch64 (mbind/get/set_mempolicy)
342063 wrong format specifier for test mcblocklistsearch in gdbserver_tests
342221 socket connect false positive uninit memory for unknown af family
342353 Allow dumping full massif output while valgrind is still running
342603 Add I2C_SMBUS ioctl support
342635 OS X 10.10 (Yosemite) - missing system calls and fcntl code
342795 Internal glibc __GI_mempcpy call should be intercepted
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
mach_task_self(), reply 0x30f]
343597 ppc64le: incorrect use of offseof macro
343732 Unhandled syscall 144 (setgid) on aarch64
343733 Unhandled syscall 187 (msgctl and related) on aarch64
343802 s390x: Fix false positives "conditional jump or move depends on
unitialised value(s)"
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 lockedness state in
pthread_cond_wait
344054 www - update info for Solaris/illumos
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
344499 Fix compilation for Linux kernel >= 4. With this, also require
a Linux kernel >= 2.6 as 2.4 is mostly untested and might trigger
obvious and non-obvious issues
344512 Fix unhandled syscall: unix:348 (__pthread_chdir) and unhandled
syscall: unix:349 (__pthread_fchdir) on OS X
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
344939 Fix memcheck/tests/xml1 on OS X 10.10
345016 helgrind/tests/locked_vs_unlocked2 is failing sometimes
345394 Fix memcheck/tests/strchr on OS X
345637 Fix memcheck/tests/sendmsg on OS X
n-i-bz Provide implementations of certain compiler builtins to support
compilers who 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
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
n-i-bz DRD and Helgrind: Handle Imbe_CancelReservation (clrex on ARM)
n-i-bz Add missing ]] to terminate CDATA.
n-i-bz Glibc versions prior to 2.5 do not define PTRACE_GETSIGINFO
n-i-bz Enable sys_fadvise64_64 on arm32.
n-i-bz Add test cases for all remaining AArch64 SIMD, FP and memory insns.
n-i-bz Add test cases for all known arm64 load/store instructions.
n-i-bz PRE(sys_openat): when checking whether ARG1 == VKI_AT_FDCWD [..]
n-i-bz Add detection of old ppc32 magic instructions from bug 278808.
n-i-bz exp-dhat: Implement missing function "dh_malloc_usable_size".
n-i-bz arm64: Implement "fcvtpu w, s".
n-i-bz arm64: implement ADDP and various others
n-i-bz arm64: Implement {S,U}CVTF (scalar, fixedpt).
n-i-bz arm64: enable FCVT{A,N}S X,S.
(3.10.1: 25 November 2014, vex r3026, valgrind r14785)
Release 3.10.0 (10 September 2014)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.10.0 is a feature release with many improvements and the usual
collection of bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, MIPS32/Android, X86/Android, X86/MacOSX 10.9
and AMD64/MacOSX 10.9. Support for MacOSX 10.8 and 10.9 is
significantly improved relative to the 3.9.0 release.
* ================== PLATFORM CHANGES =================
* Support for the 64-bit ARM Architecture (AArch64 ARMv8). This port
is mostly complete, and is usable, but some SIMD instructions are as
yet unsupported.
* Support for little-endian variant of the 64-bit POWER architecture.
* Support for Android on MIPS32.
* Support for 64bit FPU on MIPS32 platforms.
* Both 32- and 64-bit executables are supported on MacOSX 10.8 and 10.9.
* Configuration for and running on Android targets has changed.
See README.android in the source tree for details.
* ================== DEPRECATED FEATURES =================
* --db-attach is now deprecated and will be removed in the next
valgrind feature release. The built-in GDB server capabilities are
superior and should be used instead. Learn more here:
http://valgrind.org/docs/manual/manual-core-adv.html#manual-core-adv.gdbserver
* ==================== TOOL CHANGES ====================
* Memcheck:
- Client code can now selectively disable and re-enable reporting of
invalid address errors in specific ranges using the new client
requests VALGRIND_DISABLE_ADDR_ERROR_REPORTING_IN_RANGE and
VALGRIND_ENABLE_ADDR_ERROR_REPORTING_IN_RANGE.
- Leak checker: there is a new leak check heuristic called
"length64". This is used to detect interior pointers pointing 8
bytes inside a block, on the assumption that the first 8 bytes
holds the value "block size - 8". This is used by
sqlite3MemMalloc, for example.
- Checking of system call parameters: if a syscall parameter
(e.g. bind struct sockaddr, sendmsg struct msghdr, ...) has
several fields not initialised, an error is now reported for each
field. Previously, an error was reported only for the first
uninitialised field.
- Mismatched alloc/free checking: a new flag
--show-mismatched-frees=no|yes [yes] makes it possible to turn off
such checks if necessary.
* Helgrind:
- Improvements to error messages:
o Race condition error message involving heap allocated blocks also
show the thread number that allocated the raced-on block.
o All locks referenced by an error message are now announced.
Previously, some error messages only showed the lock addresses.
o The message indicating where a lock was first observed now also
describes the address/location of the lock.
- Helgrind now understands the Ada task termination rules and
creates a happens-before relationship between a terminated task
and its master. This avoids some false positives and avoids a big
memory leak when a lot of Ada tasks are created and terminated.
The interceptions are only activated with forthcoming releases of
gnatpro >= 7.3.0w-20140611 and gcc >= 5.0.
- A new GDB server monitor command "info locks" giving the list of
locks, their location, and their status.
* Callgrind:
- callgrind_control now supports the --vgdb-prefix argument,
which is needed if valgrind was started with this same argument.
* ==================== OTHER CHANGES ====================
* Unwinding through inlined function calls. Stack unwinding can now
make use of Dwarf3 inlined-unwind information if it is available.
The practical effect is that inlined calls become visible in stack
traces. The suppression matching machinery has been adjusted
accordingly. This is controlled by the new option
--read-inline-info=yes|no. Currently this is enabled by default
only on Linux and Android targets and only for the tools Memcheck,
Helgrind and DRD.
* Valgrind can now read EXIDX unwind information on 32-bit ARM
targets. If an object contains both CFI and EXIDX unwind
information, Valgrind will prefer the CFI over the EXIDX. This
facilitates unwinding through system libraries on arm-android
targets.
* Address description logic has been improved and is now common
between Memcheck and Helgrind, resulting in better address
descriptions for some kinds of error messages.
* Error messages about dubious arguments (eg, to malloc or calloc) are
output like other errors. This means that they can be suppressed
and they have a stack trace.
* The C++ demangler has been updated for better C++11 support.
* New and modified GDB server monitor features:
- Thread local variables/storage (__thread) can now be displayed.
- The GDB server monitor command "v.info location <address>"
displays information about an address. The information produced
depends on the tool and on the options given to valgrind.
Possibly, the following are described: global variables, local
(stack) variables, allocated or freed blocks, ...
- The option "--vgdb-stop-at=event1,event2,..." allows the user to
ask the GDB server to stop at the start of program execution, at
the end of the program execution and on Valgrind internal errors.
- A new monitor command "v.info stats" shows various Valgrind core
and tool statistics.
- A new monitor command "v.set hostvisibility" allows the GDB server
to provide access to Valgrind internal host status/memory.
* A new option "--aspace-minaddr=<address>" can in some situations
allow the use of more memory by decreasing the address above which
Valgrind maps memory. It can also be used to solve address
conflicts with system libraries by increasing the default value.
See user manual for details.
* The amount of memory used by Valgrind to store debug info (unwind
info, line number information and symbol data) has been
significantly reduced, even though Valgrind now reads more
information in order to support unwinding of inlined function calls.
* Dwarf3 handling with --read-var-info=yes has been improved:
- Ada and C struct containing VLAs no longer cause a "bad DIE" error
- Code compiled with
-ffunction-sections -fdata-sections -Wl,--gc-sections
no longer causes assertion failures.
* Improved checking for the --sim-hints= and --kernel-variant=
options. Unknown strings are now detected and reported to the user
as a usage error.
* The semantics of stack start/end boundaries in the valgrind.h
VALGRIND_STACK_REGISTER client request has been clarified and
documented. The convention is that start and end are respectively
the lowest and highest addressable bytes of the stack.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
175819 Support for ipv6 socket reporting with --track-fds
232510 make distcheck fails
249435 Analyzing wine programs with callgrind triggers a crash
278972 support for inlined function calls in stacktraces and suppression
== 199144
291310 FXSAVE instruction marks memory as undefined on amd64
303536 ioctl for SIOCETHTOOL (ethtool(8)) isn't wrapped
308729 vex x86->IR: unhandled instruction bytes 0xf 0x5 (syscall)
315199 vgcore file for threaded app does not show which thread crashed
315952 tun/tap ioctls are not supported
323178 Unhandled instruction: PLDW register (ARM)
323179 Unhandled instruction: PLDW immediate (ARM)
324050 Helgrind: SEGV because of unaligned stack when using movdqa
325110 Add test-cases for Power ISA 2.06 insns: divdo/divdo. and divduo/divduo.
325124 [MIPSEL] Compilation error
325477 Phase 4 support for IBM Power ISA 2.07
325538 cavium octeon mips64, valgrind reported "dumping core" [...]
325628 Phase 5 support for IBM Power ISA 2.07
325714 Empty vgcore but RLIMIT_CORE is big enough (too big)
325751 Missing the two privileged Power PC Transactional Memory Instructions
325816 Phase 6 support for IBM Power ISA 2.07
325856 Make SGCheck fail gracefully on unsupported platforms
326026 Iop names for count leading zeros/sign bits incorrectly imply [..]
326436 DRD: False positive in libstdc++ std::list::push_back
326444 Cavium MIPS Octeon Specific Load Indexed Instructions
326462 Refactor vgdb to isolate invoker stuff into separate module
326469 amd64->IR: 0x66 0xF 0x3A 0x63 0xC1 0xE (pcmpistri 0x0E)
326623 DRD: false positive conflict report in a field assignment
326724 Valgrind does not compile on OSX 1.9 Mavericks
326816 Intercept for __strncpy_sse2_unaligned missing?
326921 coregrind fails to compile m_trampoline.S with MIPS/Linux port of V
326983 Clear direction flag after tests on amd64.
327212 Do not prepend the current directory to absolute path names.
327223 Support for Cavium MIPS Octeon Atomic and Count Instructions
327238 Callgrind Assertion 'passed <= last_bb->cjmp_count' failed
327284 s390x: Fix translation of the risbg instruction
327639 vex amd64->IR pcmpestri SSE4.2 instruction is unsupported 0x34
327837 dwz compressed alternate .debug_info and .debug_str not read correctly
327916 DW_TAG_typedef may have no name
327943 s390x: add a redirection for the 'index' function
328100 XABORT not implemented
328205 Implement additional Xen hypercalls
328454 add support Backtraces with ARM unwind tables (EXIDX)
328455 s390x: SIGILL after emitting wrong register pair for ldxbr
328711 valgrind.1 manpage "memcheck options" section is badly generated
328878 vex amd64->IR pcmpestri SSE4.2 instruction is unsupported 0x14
329612 Incorrect handling of AT_BASE for image execution
329694 clang warns about using uninitialized variable
329956 valgrind crashes when lmw/stmw instructions are used on ppc64
330228 mmap must align to VKI_SHMLBA on mips32
330257 LLVM does not support `-mno-dynamic-no-pic` option
330319 amd64->IR: unhandled instruction bytes: 0xF 0x1 0xD5 (xend)
330459 --track-fds=yes doesn't track eventfds
330469 Add clock_adjtime syscall support
330594 Missing sysalls on PowerPC / uClibc
330622 Add test to regression suite for POWER instruction: dcbzl
330939 Support for AMD's syscall instruction on x86
== 308729
330941 Typo in PRE(poll) syscall wrapper
331057 unhandled instruction: 0xEEE01B20 (vfma.f64) (has patch)
331254 Fix expected output for memcheck/tests/dw4
331255 Fix race condition in test none/tests/coolo_sigaction
331257 Fix type of jump buffer in test none/tests/faultstatus
331305 configure uses bash specific syntax
331337 s390x WARNING: unhandled syscall: 326 (dup3)
331380 Syscall param timer_create(evp) points to uninitialised byte(s)
331476 Patch to handle ioctl 0x5422 on Linux (x86 and amd64)
331829 Unexpected ioctl opcode sign extension
331830 ppc64: WARNING: unhandled syscall: 96/97
331839 drd/tests/sem_open specifies invalid semaphore name
331847 outcome of drd/tests/thread_name is nondeterministic
332037 Valgrind cannot handle Thumb "add pc, reg"
332055 drd asserts on platforms with VG_STACK_REDZONE_SZB == 0 and
consistency checks enabled
332263 intercepts for pthread_rwlock_timedrdlock and
pthread_rwlock_timedwrlock are incorrect
332265 drd could do with post-rwlock_init and pre-rwlock_destroy
client requests
332276 Implement additional Xen hypercalls
332658 ldrd.w r1, r2, [PC, #imm] does not adjust for 32bit alignment
332765 Fix ms_print to create temporary files in a proper directory
333072 drd: Add semaphore annotations
333145 Tests for missaligned PC+#imm access for arm
333228 AAarch64 Missing instruction encoding: mrs %[reg], ctr_el0
333230 AAarch64 missing instruction encodings: dc, ic, dsb.
333248 WARNING: unhandled syscall: unix:443
333428 ldr.w pc [rD, #imm] instruction leads to assertion
333501 cachegrind: assertion: Cache set count is not a power of two.
== 336577
== 292281
333666 Recognize MPX instructions and bnd prefix.
333788 Valgrind does not support the CDROM_DISC_STATUS ioctl (has patch)
333817 Valgrind reports the memory areas written to by the SG_IO
ioctl as untouched
334049 lzcnt fails silently (x86_32)
334384 Valgrind does not have support Little Endian support for
IBM POWER PPC 64
334585 recvmmsg unhandled (+patch) (arm)
334705 sendmsg and recvmsg should guard against bogus msghdr fields.
334727 Build fails with -Werror=format-security
334788 clarify doc about --log-file initial program directory
334834 PPC64 Little Endian support, patch 2
334836 PPC64 Little Endian support, patch 3 testcase fixes
334936 patch to fix false positives on alsa SNDRV_CTL_* ioctls
335034 Unhandled ioctl: HCIGETDEVLIST
335155 vgdb, fix error print statement.
335262 arm64: movi 8bit version is not supported
335263 arm64: dmb instruction is not implemented
335441 unhandled ioctl 0x8905 (SIOCATMARK) when running wine under valgrind
335496 arm64: sbc/abc instructions are not implemented
335554 arm64: unhandled instruction: abs
335564 arm64: unhandled instruction: fcvtpu Xn, Sn
335735 arm64: unhandled instruction: cnt
335736 arm64: unhandled instruction: uaddlv
335848 arm64: unhandled instruction: {s,u}cvtf
335902 arm64: unhandled instruction: sli
335903 arm64: unhandled instruction: umull (vector)
336055 arm64: unhandled instruction: mov (element)
336062 arm64: unhandled instruction: shrn{,2}
336139 mip64: [...] valgrind hangs and spins on a single core [...]
336189 arm64: unhandled Instruction: mvn
336435 Valgrind hangs in pthread_spin_lock consuming 100% CPU
336619 valgrind --read-var-info=yes doesn't handle DW_TAG_restrict_type
336772 Make moans about unknown ioctls more informative
336957 Add a section about the Solaris/illumos port on the webpage
337094 ifunc wrapper is broken on ppc64
337285 fcntl commands F_OFD_SETLK, F_OFD_SETLKW, and F_OFD_GETLK not supported
337528 leak check heuristic for block prefixed by length as 64bit number
337740 Implement additional Xen hypercalls
337762 guest_arm64_toIR.c:4166 (dis_ARM64_load_store): Assertion `0' failed.
337766 arm64-linux: unhandled syscalls mlock (228) and mlockall (230)
337871 deprecate --db-attach
338023 Add support for all V4L2/media ioctls
338024 inlined functions are not shown if DW_AT_ranges is used
338106 Add support for 'kcmp' syscall
338115 DRD: computed conflict set differs from actual after fork
338160 implement display of thread local storage in gdbsrv
338205 configure.ac and check for -Wno-tautological-compare
338300 coredumps are missing one byte of every segment
338445 amd64 vbit-test fails with unknown opcodes used by arm64 VEX
338499 --sim-hints parsing broken due to wrong order in tokens
338615 suppress glibc 2.20 optimized strcmp implementation for ARMv7
338681 Unable to unwind through clone thread created on i386-linux
338698 race condition between gdbsrv and vgdb on startup
338703 helgrind on arm-linux gets false positives in dynamic loader
338791 alt dwz files can be relative of debug/main file
338878 on MacOS: assertion 'VG_IS_PAGE_ALIGNED(clstack_end+1)' failed
338932 build V-trunk with gcc-trunk
338974 glibc 2.20 changed size of struct sigaction sa_flags field on s390
345079 Fix build problems in VEX/useful/test_main.c
n-i-bz Fix KVM_CREATE_IRQCHIP ioctl handling
n-i-bz s390x: Fix memory corruption for multithreaded applications
n-i-bz vex arm->IR: allow PC as basereg in some LDRD cases
n-i-bz internal error in Valgrind if vgdb transmit signals when ptrace invoked
n-i-bz Fix mingw64 support in valgrind.h (dev@, 9 May 2014)
n-i-bz drd manual: Document how to C++11 programs that use class "std::thread"
n-i-bz Add command-line option --default-suppressions
n-i-bz Add support for BLKDISCARDZEROES ioctl
n-i-bz ppc32/64: fix a regression with the mtfsb0/mtfsb1 instructions
n-i-bz Add support for sys_pivot_root and sys_unshare
(3.10.0.BETA1: 2 September 2014, vex r2940, valgrind r14428)
(3.10.0.BETA2: 8 September 2014, vex r2950, valgrind r14503)
(3.10.0: 10 September 2014, vex r2950, valgrind r14514)
Release 3.9.0 (31 October 2013)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.9.0 is a feature release with many improvements and the usual
collection of bug fixes.
This release supports X86/Linux, AMD64/Linux, ARM/Linux, PPC32/Linux,
PPC64/Linux, S390X/Linux, MIPS32/Linux, MIPS64/Linux, ARM/Android,
X86/Android, X86/MacOSX 10.7 and AMD64/MacOSX 10.7. Support for
MacOSX 10.8 is significantly improved relative to the 3.8.0 release.
* ================== PLATFORM CHANGES =================
* Support for MIPS64 LE and BE running Linux. Valgrind has been
tested on MIPS64 Debian Squeeze and Debian Wheezy distributions.
* Support for MIPS DSP ASE on MIPS32 platforms.
* Support for s390x Decimal Floating Point instructions on hosts that
have the DFP facility installed.
* Support for POWER8 (Power ISA 2.07) instructions
* Support for Intel AVX2 instructions. This is available only on 64
bit code.
* Initial support for Intel Transactional Synchronization Extensions,
both RTM and HLE.
* Initial support for Hardware Transactional Memory on POWER.
* Improved support for MacOSX 10.8 (64-bit only). Memcheck can now
run large GUI apps tolerably well.
* ==================== TOOL CHANGES ====================
* Memcheck:
- Improvements in handling of vectorised code, leading to
significantly fewer false error reports. You need to use the flag
--partial-loads-ok=yes to get the benefits of these changes.
- Better control over the leak checker. It is now possible to
specify which leak kinds (definite/indirect/possible/reachable)
should be displayed, which should be regarded as errors, and which
should be suppressed by a given leak suppression. This is done
using the options --show-leak-kinds=kind1,kind2,..,
--errors-for-leak-kinds=kind1,kind2,.. and an optional
"match-leak-kinds:" line in suppression entries, respectively.
Note that generated leak suppressions contain this new line and
are therefore more specific than in previous releases. To get the
same behaviour as previous releases, remove the "match-leak-kinds:"
line from generated suppressions before using them.
- Reduced "possible leak" reports from the leak checker by the use
of better heuristics. The available heuristics provide detection
of valid interior pointers to std::stdstring, to new[] allocated
arrays with elements having destructors and to interior pointers
pointing to an inner part of a C++ object using multiple
inheritance. They can be selected individually using the
option --leak-check-heuristics=heur1,heur2,...
- Better control of stacktrace acquisition for heap-allocated
blocks. Using the --keep-stacktraces option, it is possible to
control independently whether a stack trace is acquired for each
allocation and deallocation. This can be used to create better
"use after free" errors or to decrease Valgrind's resource
consumption by recording less information.
- Better reporting of leak suppression usage. The list of used
suppressions (shown when the -v option is given) now shows, for
each leak suppressions, how many blocks and bytes it suppressed
during the last leak search.
* Helgrind:
- False errors resulting from the use of statically initialised
mutexes and condition variables (PTHREAD_MUTEX_INITIALISER, etc)
have been removed.
- False errors resulting from the use of pthread_cond_waits that
timeout, have been removed.
* ==================== OTHER CHANGES ====================
* Some attempt to tune Valgrind's space requirements to the expected
capabilities of the target:
- The default size of the translation cache has been reduced from 8
sectors to 6 on Android platforms, since each sector occupies
about 40MB when using Memcheck.
- The default size of the translation cache has been increased to 16
sectors on all other platforms, reflecting the fact that large
applications require instrumentation and storage of huge amounts
of code. For similar reasons, the number of memory mapped
segments that can be tracked has been increased by a factor of 6.
- In all cases, the maximum number of sectors in the translation
cache can be controlled by the new flag --num-transtab-sectors.
* Changes in how debug info (line numbers, etc) is read:
- Valgrind no longer temporarily mmaps the entire object to read
from it. Instead, reading is done through a small fixed sized
buffer. This avoids virtual memory usage spikes when Valgrind
reads debuginfo from large shared objects.
- A new experimental remote debug info server. Valgrind can read
debug info from a different machine (typically, a build host)
where debuginfo objects are stored. This can save a lot of time
and hassle when running Valgrind on resource-constrained targets
(phones, tablets) when the full debuginfo objects are stored
somewhere else. This is enabled by the --debuginfo-server=
option.
- Consistency checking between main and debug objects can be
disabled using the --allow-mismatched-debuginfo option.
* Stack unwinding by stack scanning, on ARM. Unwinding by stack
scanning can recover stack traces in some cases when the normal
unwind mechanisms fail. Stack scanning is best described as "a
nasty, dangerous and misleading hack" and so is disabled by default.
Use --unw-stack-scan-thresh and --unw-stack-scan-frames to enable
and control it.
* Detection and merging of recursive stack frame cycles. When your
program has recursive algorithms, this limits the memory used by
Valgrind for recorded stack traces and avoids recording
uninteresting repeated calls. This is controlled by the command
line option --merge-recursive-frame and by the monitor command
"v.set merge-recursive-frames".
* File name and line numbers for used suppressions. The list of used
suppressions (shown when the -v option is given) now shows, for each
used suppression, the file name and line number where the suppression
is defined.
* New and modified GDB server monitor features:
- valgrind.h has a new client request, VALGRIND_MONITOR_COMMAND,
that can be used to execute gdbserver monitor commands from the
client program.
- A new monitor command, "v.info open_fds", that gives the list of
open file descriptors and additional details.
- An optional message in the "v.info n_errs_found" monitor command,
for example "v.info n_errs_found test 1234 finished", allowing a
comment string to be added to the process output, perhaps for the
purpose of separating errors of different tests or test phases.
- A new monitor command "v.info execontext" that shows information
about the stack traces recorded by Valgrind.
- A new monitor command "v.do expensive_sanity_check_general" to run
some internal consistency checks.
* New flag --sigill-diagnostics to control whether a diagnostic
message is printed when the JIT encounters an instruction it can't
translate. The actual behavior -- delivery of SIGILL to the
application -- is unchanged.
* The maximum amount of memory that Valgrind can use on 64 bit targets
has been increased from 32GB to 64GB. This should make it possible
to run applications on Memcheck that natively require up to about 35GB.
* ==================== FIXED BUGS ====================
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
123837 system call: 4th argument is optional, depending on cmd
135425 memcheck should tell you where Freed blocks were Mallocd
164485 VG_N_SEGNAMES and VG_N_SEGMENTS are (still) too small
207815 Adds some of the drm ioctls to syswrap-linux.c
251569 vex amd64->IR: 0xF 0x1 0xF9 0xBF 0x90 0xD0 0x3 0x0 (RDTSCP)
252955 Impossible to compile with ccache
253519 Memcheck reports auxv pointer accesses as invalid reads.
263034 Crash when loading some PPC64 binaries
269599 Increase deepest backtrace
274695 s390x: Support "compare to/from logical" instructions (z196)
275800 s390x: Autodetect cache info (part 2)
280271 Valgrind reports possible memory leaks on still-reachable std::string
284540 Memcheck shouldn't count suppressions matching still-reachable [..]
289578 Backtraces with ARM unwind tables (stack scan flags)
296311 Wrong stack traces due to -fomit-frame-pointer (x86)
304832 ppc32: build failure
305431 Use find_buildid shdr fallback for separate .debug files
305728 Add support for AVX2 instructions
305948 ppc64: code generation for ShlD64 / ShrD64 asserts
306035 s390x: Fix IR generation for LAAG and friends
306054 s390x: Condition code computation for convert-to-int/logical
306098 s390x: alternate opcode form for convert to/from fixed
306587 Fix cache line detection from auxiliary vector for PPC.
306783 Mips unhandled syscall : 4025 / 4079 / 4182
307038 DWARF2 CFI reader: unhandled DW_OP_ opcode 0x8 (DW_OP_const1u et al)
307082 HG false positive: pthread_cond_destroy: destruction of unknown CV
307101 sys_capget second argument can be NULL
307103 sys_openat: If pathname is absolute, then dirfd is ignored.
307106 amd64->IR: f0 0f c0 02 (lock xadd byte)
307113 s390x: DFP support
307141 valgrind does't work in mips-linux system
307155 filter_gdb should filter out syscall-template.S T_PSEUDO
307285 x86_amd64 feature test for avx in test suite is wrong
307290 memcheck overlap testcase needs memcpy version filter
307463 Please add "&limit=0" to the "all open bugs" link
307465 --show-possibly-lost=no should reduce the error count / exit code
307557 Leaks on Mac OS X 10.7.5 libraries at ImageLoader::recursiveInit[..]
307729 pkgconfig support broken valgrind.pc
307828 Memcheck false errors SSE optimized wcscpy, wcscmp, wcsrchr, wcschr
307955 Building valgrind 3.7.0-r4 fails in Gentoo AMD64 when using clang
308089 Unhandled syscall on ppc64: prctl
308135 PPC32 MPC8xx has 16 bytes cache size
308321 testsuite memcheck filter interferes with gdb_filter
308333 == 307106
308341 vgdb should report process exit (or fatal signal)
308427 s390 memcheck reports tsearch cjump/cmove depends on uninit
308495 Remove build dependency on installed Xen headers
308573 Internal error on 64-bit instruction executed in 32-bit mode
308626 == 308627
308627 pmovmskb validity bit propagation is imprecise
308644 vgdb command for having the info for the track-fds option
308711 give more info about aspacemgr and arenas in out_of_memory
308717 ARM: implement fixed-point VCVT.F64.[SU]32
308718 ARM implement SMLALBB family of instructions
308886 Missing support for PTRACE_SET/GETREGSET
308930 syscall name_to_handle_at (303 on amd64) not handled
309229 V-bit tester does not report number of tests generated
309323 print unrecognized instuction on MIPS
309425 Provide a --sigill-diagnostics flag to suppress illegal [..]
309427 SSE optimized stpncpy trigger uninitialised value [..] errors
309430 Self hosting ppc64 encounters a vassert error on operand type
309600 valgrind is a bit confused about 0-sized sections
309823 Generate errors for still reachable blocks
309921 PCMPISTRI validity bit propagation is imprecise
309922 none/tests/ppc64/test_dfp5 sometimes fails
310169 The Iop_CmpORD class of Iops is not supported by the vbit checker.
310424 --read-var-info does not properly describe static variables
310792 search additional path for debug symbols
310931 s390x: Message-security assist (MSA) instruction extension [..]
311100 PPC DFP implementation of the integer operands is inconsistent [..]
311318 ARM: "128-bit constant is not implemented" error message
311407 ssse3 bcopy (actually converted memcpy) causes invalid read [..]
311690 V crashes because it redirects branches inside of a redirected function
311880 x86_64: make regtest hangs at shell_valid1
311922 WARNING: unhandled syscall: 170
311933 == 251569
312171 ppc: insn selection for DFP
312571 Rounding mode call wrong for the DFP Iops [..]
312620 Change to Iop_D32toD64 [..] for s390 DFP support broke ppc [..]
312913 Dangling pointers error should also report the alloc stack trace
312980 Building on Mountain Lion generates some compiler warnings
313267 Adding MIPS64/Linux port to Valgrind
313348 == 251569
313354 == 251569
313811 Buffer overflow in assert_fail
314099 coverity pointed out error in VEX guest_ppc_toIR.c insn_suffix
314269 ppc: dead code in insn selection
314718 ARM: implement integer divide instruction (sdiv and udiv)
315345 cl-format.xml and callgrind/dump.c don't agree on using cfl= or cfi=
315441 sendmsg syscall should ignore unset msghdr msg_flags
315534 msgrcv inside a thread causes valgrind to hang (block)
315545 Assertion '(UChar*)sec->tt[tteNo].tcptr <= (UChar*)hcode' failed
315689 disInstr(thumb): unhandled instruction: 0xF852 0x0E10 (LDRT)
315738 disInstr(arm): unhandled instruction: 0xEEBE0BEE (vcvt.s32.f64)
315959 valgrind man page has bogus SGCHECK (and no BBV) OPTIONS section
316144 valgrind.1 manpage contains unknown ??? strings [..]
316145 callgrind command line options in manpage reference (unknown) [..]
316145 callgrind command line options in manpage reference [..]
316181 drd: Fixed a 4x slowdown for certain applications
316503 Valgrind does not support SSE4 "movntdqa" instruction
316535 Use of |signed int| instead of |size_t| in valgrind messages
316696 fluidanimate program of parsec 2.1 stuck
316761 syscall open_by_handle_at (304 on amd64, 342 on x86) not handled
317091 Use -Wl,-Ttext-segment when static linking if possible [..]
317186 "Impossible happens" when occurs VCVT instruction on ARM
317318 Support for Threading Building Blocks "scalable_malloc"
317444 amd64->IR: 0xC4 0x41 0x2C 0xC2 0xD2 0x8 (vcmpeq_uqps)
317461 Fix BMI assembler configure check and avx2/bmi/fma vgtest prereqs
317463 bmi testcase IR SANITY CHECK FAILURE
317506 memcheck/tests/vbit-test fails with unknown opcode after [..]
318050 libmpiwrap fails to compile with out-of-source build
318203 setsockopt handling needs to handle SOL_SOCKET/SO_ATTACH_FILTER
318643 annotate_trace_memory tests infinite loop on arm and ppc [..]
318773 amd64->IR: 0xF3 0x48 0x0F 0xBC 0xC2 0xC3 0x66 0x0F
318929 Crash with: disInstr(thumb): 0xF321 0x0001 (ssat16)
318932 Add missing PPC64 and PPC32 system call support
319235 --db-attach=yes is broken with Yama (ptrace scoping) enabled
319395 Crash with unhandled instruction on STRT (Thumb) instructions
319494 VEX Makefile-gcc standalone build update after r2702
319505 [MIPSEL] Crash: unhandled UNRAY operator.
319858 disInstr(thumb): unhandled instruction on instruction STRBT
319932 disInstr(thumb): unhandled instruction on instruction STRHT
320057 Problems when we try to mmap more than 12 memory pages on MIPS32
320063 Memory from PTRACE_GET_THREAD_AREA is reported uninitialised
320083 disInstr(thumb): unhandled instruction on instruction LDRBT
320116 bind on AF_BLUETOOTH produces warnings because of sockaddr_rc padding
320131 WARNING: unhandled syscall: 369 on ARM (prlimit64)
320211 Stack buffer overflow in ./coregrind/m_main.c with huge TMPDIR
320661 vgModuleLocal_read_elf_debug_info(): "Assertion '!di->soname'
320895 add fanotify support (patch included)
320998 vex amd64->IR pcmpestri and pcmpestrm SSE4.2 instruction
321065 Valgrind updates for Xen 4.3
321148 Unhandled instruction: PLI (Thumb 1, 2, 3)
321363 Unhandled instruction: SSAX (ARM + Thumb)
321364 Unhandled instruction: SXTAB16 (ARM + Thumb)
321466 Unhandled instruction: SHASX (ARM + Thumb)
321467 Unhandled instruction: SHSAX (ARM + Thumb)
321468 Unhandled instruction: SHSUB16 (ARM + Thumb)
321619 Unhandled instruction: SHSUB8 (ARM + Thumb)
321620 Unhandled instruction: UASX (ARM + Thumb)
321621 Unhandled instruction: USAX (ARM + Thumb)
321692 Unhandled instruction: UQADD16 (ARM + Thumb)
321693 Unhandled instruction: LDRSBT (Thumb)
321694 Unhandled instruction: UQASX (ARM + Thumb)
321696 Unhandled instruction: UQSAX (Thumb + ARM)
321697 Unhandled instruction: UHASX (ARM + Thumb)
321703 Unhandled instruction: UHSAX (ARM + Thumb)
321704 Unhandled instruction: REVSH (ARM + Thumb)
321730 Add cg_diff and cg_merge man pages
321738 Add vgdb and valgrind-listener man pages
321814 == 315545
321891 Unhandled instruction: LDRHT (Thumb)
321960 pthread_create() then alloca() causing invalid stack write errors
321969 ppc32 and ppc64 don't support [lf]setxattr
322254 Show threadname together with tid if set by application
322294 Add initial support for IBM Power ISA 2.07
322368 Assertion failure in wqthread_hijack under OS X 10.8
322563 vex mips->IR: 0x70 0x83 0xF0 0x3A
322807 VALGRIND_PRINTF_BACKTRACE writes callstack to xml and text to stderr
322851 0bXXX binary literal syntax is not standard
323035 Unhandled instruction: LDRSHT(Thumb)
323036 Unhandled instruction: SMMLS (ARM and Thumb)
323116 The memcheck/tests/ppc64/power_ISA2_05.c fails to build [..]
323175 Unhandled instruction: SMLALD (ARM + Thumb)
323177 Unhandled instruction: SMLSLD (ARM + Thumb)
323432 Calling pthread_cond_destroy() or pthread_mutex_destroy() [..]
323437 Phase 2 support for IBM Power ISA 2.07
323713 Support mmxext (integer sse) subset on i386 (athlon)
323803 Transactional memory instructions are not supported for Power
323893 SSE3 not available on amd cpus in valgrind
323905 Probable false positive from Valgrind/drd on close()
323912 valgrind.h header isn't compatible for mingw64
324047 Valgrind doesn't support [LDR,ST]{S}[B,H]T ARM instructions
324149 helgrind: When pthread_cond_timedwait returns ETIMEDOUT [..]
324181 mmap does not handle MAP_32BIT
324227 memcheck false positive leak when a thread calls exit+block [..]
324421 Support for fanotify API on ARM architecture
324514 gdbserver monitor cmd output behaviour consistency [..]
324518 ppc64: Emulation of dcbt instructions does not handle [..]
324546 none/tests/ppc32 test_isa_2_07_part2 requests -m64
324582 When access is made to freed memory, report both allocation [..]
324594 Fix overflow computation for Power ISA 2.06 insns: mulldo/mulldo.
324765 ppc64: illegal instruction when executing none/tests/ppc64/jm-misc
324816 Incorrect VEX implementation for xscvspdp/xvcvspdp for SNaN inputs
324834 Unhandled instructions in Microsoft C run-time for x86_64
324894 Phase 3 support for IBM Power ISA 2.07
326091 drd: Avoid false race reports from optimized strlen() impls
326113 valgrind libvex hwcaps error on AMD64
n-i-bz Some wrong command line options could be ignored
n-i-bz patch to allow fair-sched on android
n-i-bz report error for vgdb snapshot requested before execution
n-i-bz same as 303624 (fixed in 3.8.0), but for x86 android
(3.9.0: 31 October 2013, vex r2796, valgrind r13708)
Release 3.8.1 (19 September 2012)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3.8.1 is a bug fix release. It fixes some assertion failures in 3.8.0
that occur moderately frequently in real use cases, adds support for
some missing instructions on ARM, and fixes a deadlock condition on
MacOSX. If you package or deliver 3.8.0 for others to use, you might
want to consider upgrading to 3.8.1 instead.
The following bugs have been fixed or resolved. Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry. We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.
To see details of a given bug, visit
https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed below.
284004 == 301281
289584 Unhandled instruction: 0xF 0x29 0xE5 (MOVAPS)
295808 amd64->IR: 0xF3 0xF 0xBC 0xC0 (TZCNT)
298281 wcslen causes false(?) uninitialised value warnings
301281 valgrind hangs on OS X when the process calls system()
304035 disInstr(arm): unhandled instruction 0xE1023053
304867 implement MOVBE instruction in x86 mode
304980 Assertion 'lo <= hi' failed in vgModuleLocal_find_rx_mapping
305042 amd64: implement 0F 7F encoding of movq between two registers
305199 ARM: implement QDADD and QDSUB
305321 amd64->IR: 0xF 0xD 0xC (prefetchw)
305513 killed by fatal signal: SIGSEGV
305690 DRD reporting invalid semaphore when sem_trywait fails
305926 Invalid alignment checks for some AVX instructions
306297 disInstr(thumb): unhandled instruction 0xE883 0x000C
306310 3.8.0 release tarball missing some files
306612 RHEL 6 glibc-2.X default suppressions need /lib*/libc-*patterns
306664 vex amd64->IR: 0x66 0xF 0x3A 0x62 0xD1 0x46 0x66 0xF
n-i-bz shmat of a segment > 4Gb does not work
n-i-bz simulate_control_c script wrong USR1 signal number on mips
n-i-bz vgdb ptrace calls wrong on mips [...]
n-i-bz Fixes for more MPI false positives
n-i-bz exp-sgcheck's memcpy causes programs to segfault
n-i-bz OSX build w/ clang: asserts at startup
n-i-bz Incorrect undef'dness prop for Iop_DPBtoBCD and Iop_BCDtoDPB
n-i-bz fix a couple of union tag-vs-field mixups
n-i-bz OSX: use __NR_poll_nocancel rather than __NR_poll
The following bugs were fixed in 3.8.0 but not listed in this NEWS
file at the time:
254088 Valgrind should know about UD2 instruction
301280 == 254088
301902 == 254088
304754 NEWS blows TeX's little mind