Valgrind-3.19.0 is available

We are pleased to announce a new release of Valgrind, version 3.19.0,
available from https://valgrind.org/downloads/current.html.

3.19.0 fixes a number of bugs and was tested against glibc-2.35, gcc-12 
(pre-release) and linux 5.17.1 on GNU/Linux systems and tested on
various FreeBSD systems. See the release notes below for details of
changes.

Our thanks to all those who contribute to Valgrind's development.  This
release represents a great deal of time, energy and effort on the part
of many people.

Happy and productive debugging and profiling,

-- The Valgrind Developers

~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This release supports X86/Linux, AMD64/Linux, ARM32/Linux, ARM64/Linux,
PPC32/Linux, PPC64BE/Linux, PPC64LE/Linux, S390X/Linux, MIPS32/Linux,
MIPS64/Linux, ARM/Android, ARM64/Android, MIPS32/Android, X86/Android,
X86/Solaris, AMD64/Solaris, AMD64/MacOSX 10.12, X86/FreeBSD and
AMD64/FreeBSD.  There is also preliminary support for X86/macOS 10.13,
AMD64/macOS 10.13 and nanoMIPS/Linux.

* ==================== CORE CHANGES ===================

* Fix Rust v0 name demangling.
* The Linux rseq syscall is now implemented as (silently) returning ENOSYS.
* Add FreeBSD syscall wrappers for __specialfd and __realpathat.
* Remove FreeBSD dependencies on COMPAT10, which fixes compatibility with HardenedBSD

* ================== PLATFORM CHANGES =================

* arm64:
  - ignore the "v8.x" architecture levels, only look at actual CPU features
    present. Fixes mismatch detected between RDMA and atomics features
    preventing startup on some QEMU configurations.
  - Implement LD{,A}XP and ST{,L}XP
  - Fix incorrect code emitted for doubleword CAS.

* s390:
  - Fix sys_ipc semtimedop syscall
  - Fix VFLRX and WFLRX instructions
  - Fix EXRL instruction with negative offset

* ppc64:
  - Reimplement the vbpermq instruction support to generate less Iops and
    avoid overflowing internal buffers.
  - Fix checking for scv support to avoid "Facility 'SCV' unavailable (12),
    exception" messages in dmsg.
  - Fix setting condition code for Vector Compare quad word instructions.
  - Fix fix lxsibzx, lxsihzx and lxsihzx instructions so they only load
    their respective sized data.
  - Fix the prefixed stq instruction in PC relative mode.

* ==================== TOOL CHANGES ===================

* Memcheck:
  - Speed up --track-origins=yes for large (in the range of hundreds to
    thousands of megabytes) mmap/munmaps.
* DRD/Helgrind:
  - Several fixes for new versions of libstd++ using new posix try_lock
    functions

* ==================== FIXED BUGS ====================

The following bugs have been fixed or resolved.  Note that "n-i-bz"
stands for "not in bugzilla" -- that is, a bug that was reported to us
but never got a bugzilla entry.  We encourage you to file bugs in
bugzilla (https://bugs.kde.org/enter_bug.cgi?product=valgrind) rather
than mailing the developers (or mailing lists) directly -- bugs that
are not entered into bugzilla tend to get forgotten about or ignored.

403802  leak_cpp_interior fails with some reachable blocks different than expected
435732  memcheck/tests/leak_cpp_interior fails with gcc11
444242  s390x: Valgrind crashes on EXRL with negative offset
444399  arm64: unhandled instruction 0xC87F2D89 (LD{,A}XP and ST{,L}XP).
        == 434283
444481  gdb_server test failures on s390x
444495  dhat/tests/copy fails on s390x
444552  memcheck/tests/sem fails on s390x with glibc 2.34
444571  PPC, fix the lxsibzx and lxsihzx so they only load their respective
        sized data.
444836  PPC, pstq instruction for R=1 is not storing to the correct address.
444925  fexecve syscall wrapper not properly implemented
445032  valgrind/memcheck crash with SIGSEGV when SIGVTALRM timer used and
        libthr.so associated
445211  Fix out of tree builds
445300  [PATCH] Fix building tests with Musl
445011  SIGCHLD is sent when valgrind uses debuginfod-find
445354  arm64 backend: incorrect code emitted for doubleword CAS
445415  arm64 front end: alignment checks missing for atomic instructions
445504  Using C++ condition_variable results in bogus "mutex is locked simultaneously by two threads" warning
445607  Unhandled amd64-freebsd syscall: 247
445668  Inline stack frame generation is broken for Rust binaries
445916  Demangle Rust v0 symbols with .llvm suffix
446139  DRD/Helgrind with std::shared_timed_mutex::try_lock_until and try_lock_shared_until false positives
446138  DRD/Helgrind with std::timed_mutex::try_lock_until false positives
446281  Add a DRD suppression for fwrite
446103  Memcheck: `--track-origins=yes` causes extreme slowdowns for large mmap/munmap
446139  DRD/Helgrind with std::shared_timed_mutex::try_lock_until and try_lock_shared_until false
446251  TARGET_SIGNAL_THR added to enum target_signal
446823  FreeBSD - missing syscalls when using libzm4
447991  s390x: Valgrind indicates illegal instruction on wflrx
447995  Valgrind segfault on power10 due to hwcap checking code
449483  Powerpc: vcmpgtsq., vcmpgtuq,, vcmpequq. instructions not setting the
        condition code correctly.
449672  ppc64 --track-origins=yes failures because of bad cmov addHRegUse
449838  sigsegv liburing the 'impossible' happened for io_uring_setup
450025  Powerc: ACC file not implemented as a logical overlay of the VSR
        registers.
450437  Warn for execve syscall with argv or argv[0] being NULL
450536  Powerpc: valgrind throws 'facility scv unavailable exception'
451626  Syscall param bpf(attr->raw_tracepoint.name) points to unaddressable byte(s)
451827  [ppc64le] VEX temporary storage exhausted with several vbpermq instructions
451843  valgrind fails to start on a FreeBSD system which enforces W^X

To see details of a given bug, visit
  https://bugs.kde.org/show_bug.cgi?id=XXXXXX
where XXXXXX is the bug number as listed above.

(3.19.0.RC1: 02 Apr 2022)
(3.19.0.RC2: 08 Apr 2022)