File: ChangeLog

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commit 9608fa3bcf8020d35f59fbf70cd3cbe4b015b972
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:   Sun Apr 29 16:55:59 2018 -0700

    bumped version to 2.7

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit db890ccfade3cf054ec330dfb4a9ddfab971367e
Author: HolyWu <holywu@gmail.com>
Date:	Mon Apr 30 12:08:51 2018 +0800

    Clean up src/windows/config.h

M	src/windows/config.h

commit 497ea331654f7ea9e4e6405f5beaea8ebcc9d10b
Author: HolyWu <holywu@gmail.com>
Date:	Sun Apr 15 22:47:17 2018 +0800

    Fix WIN32_OVERRIDE_ALLOCATORS for VS2017

    At first I try to add some functions as what Chrome does at their
    https://chromium.googlesource.com/chromium/src/+/master/base/allocator/allocator_shim_override_ucrt_symbols_win.h,
    but it still fails. So I decide to remove all heap-related objects
    from libucrt.lib to see what happens. At the end I find that a lot of
    functions in the CRT directly invoke _malloc_base instead of
    malloc (and the others alike), hence we need to override them as well.

    This should close issue #716.

    [alkondratenko@gmail.com: added reference to ticket]
    Signed-off-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>

M	src/libc_override.h
M	src/tcmalloc.cc
M	src/windows/override_functions.cc
M	src/windows/port.h

commit ebc85cca9083241ae360e0c68e2f1d7538001fa3
Author: HolyWu <holywu@gmail.com>
Date:	Tue Apr 17 11:40:49 2018 +0800

    Enable aligned new/delete declarations on Windows when applicable

M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in

commit a3badd6d2127c161f6fbad853fccd6e8064fcde7
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Apr 29 16:34:54 2018 -0700

    Really fix CheckAddressBits compilation warning

    It looks like previous fix introduced another warning on gcc for
    i386. Somehow it barked on kAddressBits shift even that shift was dead
    code.

    Anyways, we now avoid possibility of undefined shift even
    stronger. And it actually removes compile warning on all compilers I
    tested.

M	src/system-alloc.cc

commit 7c718fe1768273f94acf2bd43cfa1f44a4b9bdcc
Author: HolyWu <holywu@gmail.com>
Date:	Thu Apr 19 13:49:28 2018 +0800

    Add tests for sized deallocation

M	src/tests/tcmalloc_unittest.cc

commit 30e5e614a846d5f046454341f108bc4cb2b70189
Author: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date:	Sun Apr 22 19:17:12 2018 +0200

    Fix build without static libraries

    Only add -static to malloc_bench_LDFLAGS and binary_trees_LDFLAGS if
    ENABLE_STATC is set otherwise build with some compilers will fail if
    user has decided to build only the shared version of gperftools
    libraries

    Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

M	Makefile.am

commit 836c4f29a585e4b176738f64cf8d312171be5fe0
Author: Ben Dang <me@bdang.it>
Date:	Fri Apr 13 10:54:05 2018 -0700

    Update documentation for heap_checker.html

    Make it clear that the static methods used require the "namespace",
    `HeapLeakChecker::`.

M	docs/heap_checker.html

commit e47d0d1c5142a4ad1203e58db31af2f58bafcda9
Author: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Date:	Tue Apr 10 15:56:52 2018 -0300

    powerpc: Re-enable VDSO support

    Powerpc requires VDSO support in order to produce a stack trace.
    Without this, it isn't possible to complete a build.
    Tested on powerpc, powerpc64 and powerpc64le.

M	src/base/vdso_support.h

commit 0a66dd3a6ac60e57d9c01f17309a40e2ebe06837
Author: Christoph Müllner <christophm30@gmail.com>
Date:	Sat Apr 7 09:00:09 2018 +0200

    linux: add aarch64_ilp32 support.

    This patch adds aarch64 (arm64) ILP32 support by using
    the proper syscalls for sys_fcntl(), sys_fstat(), sys_lseek()
    and sys_mmap().

    Signed-off-by: Christoph Müllner <christophm30@gmail.com>

M	src/base/linux_syscall_support.h

commit 05dff0966362932631a2120eaeb8eebb50dd9300
Author: Christoph Müllner <christophm30@gmail.com>
Date:	Sat Apr 7 08:30:32 2018 +0200

    Fix signature of sbrk.

    The manpage of sbrk says that its argument is of type intptr_t.
    This patch fixes a compiler warning on gcc 7.3.0.

    Signed-off-by: Christoph Müllner <christophm30@gmail.com>

M	src/malloc_hook_mmap_linux.h

commit 33ae0ed2ae7ce143276658be029c28ec6f2a73c9
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Apr 9 20:57:29 2018 -0700

    unbreak compilation on GNU/Linux i386

    Recent commit to fix int overflow for implausibly huge allocation
    added call to std::min. Notably, first arg was old size divided by
    unsigned long 4. And on GNU/Linux i386 size_t is not long. So such
    division was promoting first arg to unsigned long while second arg was
    still size_t, so just unsigned. And that caused compilation to fail.

    Fix is droping 'ul'.

M	src/tcmalloc.cc

commit 977e0d45003514d088e4bb83474c985094acee47
Author: Christoph Müllner <christophm30@gmail.com>
Date:	Sat Apr 7 08:35:42 2018 +0200

    Remove not needed header in vdso_support.cc.

    Signed-off-by: Christoph Müllner <christophm30@gmail.com>

M	src/base/vdso_support.cc

commit 36bfa9a4046109efa40ccc0806c72331de9c915b
Author: Mao <littlecvr@gmail.com>
Date:	Mon Mar 26 17:22:19 2018 +0800

    Enable tcmalloc VDSO support only on x86 to reduce static initializers

    Background context
    ------------------
    crrev.com/1466173002 switched the GN tcmalloc target from source_set
    -> static_library. There are good reasons for keeping tcmalloc a
    source_set (see "Note on static libraries" in [1]).  However, in the
    current state source_set was exposing extra static initializers in the
    GN build which, are not present in the gyp build due to the linker gc
    sections.

    Resolution of this CL
    ---------------------
    The fact that vdso_support.cc is GC-ed by the linker is the symptom
    that such code is unreachable. A search in the codebase shows that the
    only client is stacktrace_x86-inl.h, which depends on VDSO only when
    defined(__linux__) && defined(__i386__) This CL is therefore matching
    this condition in vdso_support.h and conditioning the #define
    HAVE_VDSO_SUPPORT with the same conditions.

    [1]
    https://chromium.googlesource.com/chromium/src/+/master/tools/gn/docs/cookbook.md

    References:
    https://bugs.chromium.org/p/chromium/issues/detail?id=559766
    https://bugs.chromium.org/p/chromium/issues/detail?id=564618

M	src/base/vdso_support.h

commit 1cb5de6db9f30daa56a0b54652a7ff6da288c1bd
Author: Mao <littlecvr@gmail.com>
Date:	Mon Mar 26 17:28:28 2018 +0800

    Explicitly prevent int overflow

M	src/tcmalloc.cc

commit 8f63f2bb983e93b57e24a05964104f1d833c575b
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 24 21:15:01 2018 -0700

    Correctly detect presence of various functions in tcmalloc.h

    This fixes test miscompilations on some clang 6.0
    installations. Particularly issue #946.

    Defines tested by tcmalloc.h where totally wrong defines. configure
    actually puts defines of HAVE_DECL_FOOBAR kind in config.h. Which is
    what we're using now.

M	src/tcmalloc.h

commit 736648887b0b27ec70a50f0954a614dd65c1eb12
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 24 15:54:48 2018 -0700

    Don't test OOM handling of debugallocator

    This may fix issue #969.

    When testing OOM handling we set up sys allocator that fails memory
    allocation. But debugallocator itself allocates some internal metadata
    memory via malloc and crashes if those allocations fail. So
    occasionally this test failed when debugallocator's internal malloc
    ended up causing sys allocator.

    So instead of failing tests from time to time, we drop it for debug
    allocator. It's OOM handling is already crashy anyways.

M	src/tests/tcmalloc_unittest.cc

commit c4a8e00da41c43da7e78858e06f3153f09f6967d
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 24 19:09:15 2018 -0700

    Fix warning about one of CheckAddressBits functions unused

M	src/system-alloc.cc

commit 47c99cf492fa340671fa89afec263b8d6e859755
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 24 18:29:06 2018 -0700

    unbreak printing large span stats

    One of recent commits started passing kMaxPages to printf but not used
    it. Thankfully compilers gave us warning. Apparently intention was to
    print real value of kMaxPages, so this is what we're doing now.

M	src/tcmalloc.cc

commit 34f78a2dcd8160b483d86474702785337bbeb7ac
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Mar 18 16:39:06 2018 -0700

    bumped version to 2.7rc

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit db98aac55a90d45e9abe188c8a928c3561d3f223
Author: Todd Lipcon <todd@cloudera.com>
Date:	Sat Mar 17 09:43:34 2018 -0700

    Add a central free list for kMaxPages-sized spans

    Previously, the central free list with index '0' was always unused,
    since freelist index 'i' tracked spans of length 'i' and there are no
    spans of length 0. This meant that there was no freelist for spans of
    length 'kMaxPages'. In the default configuration, this corresponds to
    1MB, which is a relatively common allocation size in a lot of
    applications.

    This changes the free list indexing so that index 'i' tracks spans of
    length 'i + 1', meaning that free list index 0 is now used and
    freelist[kMaxPages - 1] tracks allocations of kMaxPages size (1MB by
    default).

    This also fixes the stats output to indicate '>128' for the large
    spans
    stats rather than the incorrect '>255' which must have referred to a
    historical value of kMaxPages.

    No new tests are added since this code is covered by existing tests.

M	docs/pageheap.dot
M	docs/pageheap.gif
M	docs/tcmalloc.html
M	src/common.h
M	src/page_heap.cc
M	src/page_heap.h
M	src/tcmalloc.cc

commit d7be9385609328a03c5cfe775473a7dc8e014fd3
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Mar 4 23:29:46 2018 -0800

    implement more robust detection of sized delete support

    As reported in issue #954, osx clang compiler is able to optimize our
    previous detection away while not really having runtime support for
    sized delete. So this time we use AC_LINK_IFELSE and more robust code
    to prevent compiler from optimizing away sized delete call. This
    should reliably catch "bad" compilers.

    Special thanks to Alexey Serbin for reporting the issue, suggesting a
    fix and verifying it.

    Fixes issue #954.

M	configure.ac

commit f1d3fe4a21e339a3fd6e4592ee7444484a7b92dc
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 25 13:55:53 2018 -0800

    refactored handling of reverse span set iterator for correctness

    I.e. no more questionable memcpy and we run iterator's destructor when
    we remove span from SpanSet.

M	src/page_heap.cc
M	src/span.h

commit 59c77be0fad2a49e31d51877985e7c48f73afcea
Author: Todd Lipcon <todd@cloudera.com>
Date:	Sun Feb 11 16:21:42 2018 -0800

    Update docs for central page heap to reflect tree

M	docs/pageheap.dot
M	docs/pageheap.gif
M	docs/tcmalloc.html

commit 06c9414ec423ffe442c047b2560555f9d5847b1d
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Jun 3 15:31:06 2017 -0700

    Implemented O(log n) searching among large spans

    This is implemented via std::set with custom STL allocator that
    delegates to PageHeapAllocator. Free large spans are not linked
    together via linked list, but inserted into std::set. Spans also store
    iterators to std::set positions pointing to them. So that removing
    span from set is fast too.

    Patch implemented by Aliaksey Kandratsenka and Todd Lipcon based on
    earlier research and experimentation by James Golick.

    Addresses issue #535

    [alkondratenko@gmail.com: added Todd's fix for building on OSX]
    [alkondratenko@gmail.com: removed unnecessary Span constructor]
    [alkondratenko@gmail.com: added const for SpanSet comparator]
    [alkondratenko@gmail.com: added operator != for STLPageHeapAllocator]

M	src/page_heap.cc
M	src/page_heap.h
M	src/page_heap_allocator.h
M	src/span.h
M	src/tests/tcmalloc_unittest.cc

commit a42e44738a330783781541411392ba27df88b8b3
Author: Ishan Arora <ishan.arora@gravitonresearch.com>
Date:	Tue Jan 9 01:33:13 2018 +0530

    typo in docs/tcmalloc.html

M	docs/tcmalloc.html

commit 71bf09aabe93dbe390ebb54c57d3c5b3d627c142
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Dec 9 09:58:31 2017 -0800

    bumped version to 2.6.3

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 0bccb5e658762f30e6e3abbc40dc244e8f8911c1
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Dec 9 08:51:19 2017 -0800

    fix malloc fast path for patched windows functions

    malloc_fast_path now receives oom function instead of full allocation
    function and windows/patch_function.cc wasn't updated until now. It
    caused assertion failures as reported in issue #944.

M	src/windows/patch_functions.cc

commit 8b1d13c631024ce7e80508c284c7bc5b1327e131
Author: Stephan Zuercher <stephan@turbinelabs.io>
Date:	Tue Dec 5 09:49:36 2017 -0800

    configure.ac: use link check for std::align_val_t

M	configure.ac

commit 36ab068baa3b07c083bd79029622aa382aeff84a
Author: Stephan Zuercher <stephan@turbinelabs.io>
Date:	Tue Dec 5 09:31:38 2017 -0800

    configure.ac: better test for -faligned-new

    XCode 9 provides only partial support for aligned new/delete when
    -faligned-new
    is specified. Require successful linking to enable aligned new/delete.

M	configure.ac

commit 6a4b0799975576c2722daa75b35f6f65220d22b6
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Thu Nov 30 18:19:17 2017 +0000

    bumped version to 2.6.2

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 22917145186bc8bbb6d98090d788ed7c87b282b1
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Thu Nov 30 16:36:33 2017 +0000

    implement fast-path for memalign/aligned_alloc/tc_new_aligned

    We're taking advantage of "natural" alignedness of our size classes
    and instead of previous loop over size classes looking for suitably
    aligned size, we now directly compute right size. See align_size_up
    function. And that gives us ability to use our existing malloc
    fast-path to make memalign neat and fast in most common
    cases. I.e. memalign/aligned_alloc now only tail calls and thus avoids
    expensive prologue/epilogue and is almost as fast as regular malloc.

M	src/common.cc
M	src/tcmalloc.cc

commit 8b9728b02325a9bee9afd3957e506c111ed40d40
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Thu Nov 30 18:12:32 2017 +0000

    add memalign benchmark to malloc_bench

M	benchmark/malloc_bench.cc

commit 79c91a9810c928d7f6d0cb168c10ce470a714aa8
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Wed Nov 29 21:15:04 2017 +0000

    always define empty PERFTOOLS_NOTHROW

    Because somehow clang still builds "this function will not throw" code
    even with noexcept. Which breaks performance of
    tc_malloc/tc_new_nothrow. The difference with throw() seems to be just
    which function is called when unexpected exception happens.

    So we work around this sillyness by simply dropping any exception
    specification when compiling tcmalloc.

M	src/tcmalloc.cc

commit 03da6afff57c12845260997213b6ad89e420bab3
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Wed Nov 29 20:19:07 2017 +0000

    unbreak throw declarations on operators new/delete

    We now clearly separate PERFTOOLS_NOTHROW (used for tc_XXX functions)
    and throw()/noexcept (used for operators we define).

    The former is basically "nothrow() for our callers, nothing for
    us". It is roughly equivalent of what glibc declares for malloc and
    friends. If some exception-full C++ code calls such function it
    doesn't have to bother setting up exception handling around such
    call. Notably, it is still important for those functions to _not have
    throw() declarations when we're building tcmalloc. Because C++ throw()
    requires setting up handling of unexpected exceptions thrown from
    under such functions which we don't want.

    The later is necessary to have operators new/delete definitions have
    "correct" exception specifications to calm down compiler
    warnings. Particularly older clang versions warn if new/delete aren't
    defined with correct exception specifications. Also this commit fixes
    annoying gcc 7+ warning (and gnu++14 mode) that complains about
    throw() being deprecated.

M	src/base/basictypes.h
M	src/libc_override.h
M	src/libc_override_gcc_and_weak.h
M	src/libc_override_redefine.h
M	src/tests/tcmalloc_unittest.cc
M	src/windows/get_mangled_names.cc

commit 89fe59c8318b2f8cec8ce00182dd24c357252c96
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Wed Nov 29 13:37:50 2017 +0000

    Fix OOM handling in fast-path

    Previous fast-path malloc implementation failed to arrange proper oom
    handling for operator new. I.e. operator new is supposed to call new
    handler and throw exception, which was not arranged in fast-path case.

    Fixed code now passes pointer for oom function to
    ThreadCache::FetchFromCentralCache which will call it in oom
    condition. Test is added to verify correct behavior.

    I've also updated some fast-path-related comments for more accuracy.

M	src/tcmalloc.cc
M	src/tests/tcmalloc_unittest.cc
M	src/thread_cache.cc
M	src/thread_cache.h

commit a29a0cf348e131d5b8ec26c39dabeac89cf13fcd
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Tue Nov 28 14:43:11 2017 +0000

    delete-trailing-whitespace on thread_cache.*

M	src/thread_cache.cc
M	src/thread_cache.h

commit e6cd69bdecde074c3c7a52ccb099eafcecf668dc
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Wed Nov 29 19:49:18 2017 +0000

    reintroduce aliasing for aligned delete

    Without aliasing performance is likely to be at least partially
    affected. There is still concern that aliasing between functions of
    different signatures is not 100% safe. We now explicitly list of
    architectures where aliasing is known to be safe.

M	src/tcmalloc.cc

commit fb30c3d435c4712785a50f8a422c76ad490a12b2
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Wed Nov 29 19:10:23 2017 +0000

    fully disable aligned new on windows for now

M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in

commit 7efb3ecf37d88edf9cf9a43efb89b425eaf81d5e
Author: Andrey Semashev <andrey.semashev@gmail.com>
Date:	Sat Sep 30 17:47:35 2017 +0300

    Add support for C++17 operator new/delete for overaligned types.

    - Add auto-detection of std::align_val_t presence to configure
    scripts. This
      indicates that the compiler supports C++17 operator new/delete
      overloads
      for overaligned types.

    - Add auto-detection of -faligned-new compiler option that appeared
    in gcc 7.
      The option allows the compiler to generate calls to the new
      operators. It is
      needed for tests.

    - Added overrides for the new operators. The overrides are enabled
    if the
      support for std::align_val_t has been detected. The implementation
      is mostly
      based on the infrastructure used by memalign, which had to be
      extended to
      support being used by C++ operators in addition to C functions. In
      particular,
      the debug version of the library has to distinguish memory
      allocated by
      memalign from that by operator new. The current implementation
      of sized
      overaligned delete operators do not make use of the supplied
      size argument
      except for the debug allocator because it is difficult to calculate
      the exact
      allocation size that was used to allocate memory with
      alignment. This can be
      done in the future.

    - Removed forward declaration of std::nothrow_t. This was not
    portable as
      the standard library is not required to provide nothrow_t
      directly in
      namespace std (it could use e.g. an inline namespace within
      std). The <new>
      header needs to be included for std::align_val_t anyway.

    - Fixed operator delete[] implementation in libc_override_redefine.h.

    - Moved TC_ALIAS definition to the beginning of the file in
    tcmalloc.cc so that
      the macro is defined before its first use in nallocx.

    - Added tests to verify the added operators.

    [alkondratenko@gmail.com: fixed couple minor warnings, and some
    whitespace change]
    [alkondratenko@gmail.com: removed addition of TC_ALIAS in debug
    allocator]
    Signed-off-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>

M	Makefile.am
M	configure.ac
M	src/debugallocation.cc
M	src/gperftools/tcmalloc.h.in
M	src/libc_override_gcc_and_weak.h
M	src/libc_override_redefine.h
M	src/tcmalloc.cc
M	src/tests/tcmalloc_unittest.cc
M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in

commit 7a6e25f3b143c35ed6fff8bb2c0f8de1ab348a39
Author: Andrew Morrow <acm@mongodb.com>
Date:	Tue Nov 7 15:57:17 2017 -0500

    Add new statistics for the PageHeap

    [alkondratenko@gmail.com: addressed init order mismatch warning]
    Signed-off-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>

M	src/page_heap.cc
M	src/page_heap.h
M	src/tcmalloc.cc

commit 6e3a702fb9c86eb450f22b326ecbceef4b0d6604
Author: Jianbo Yang <jianbyan@microsoft.com>
Date:	Tue Oct 17 01:09:18 2017 +0800

    Fix data race setting size_left_ in ThreadCache::SetMaxSize

    This commit is to fix the data race in ThreadCache::SetMaxSize.
    ThreadCache::size_left_ is removed and ThreadCache::size_ is
    added. ThreadCache::size_left_ was introduced for optimization.
    It is updated in several functions of ThreadCache, including the
    ThreadCache::SetMaxSize. But thread A can update size_left_ of
    thread B via SetMaxSize without protection or synchronization.

    There should not be data race around ThreadCache::size_, for it
    isn't accessed by multi threads.

    The optimization of tail-call in tc_{malloc, new, free} is kept
    and no other logics are affected.

M	src/thread_cache.cc
M	src/thread_cache.h

commit 235471f96564aa95354839bb135661e561966001
Author: cs-lee <sollcs.star@gmail.com>
Date:	Sun Aug 6 04:57:42 2017 -0700

    fix memory leak in Symbolize function

    [alkondratenko@gmail.com: reworded commit message]
    Signed-off-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>

M	src/symbolize.cc

commit 47efdd60f596f7180689337cbba2dab35539ba98
Author: cs-lee <sollcs.star@gmail.com>
Date:	Sun Aug 6 04:51:52 2017 -0700

    Added mising va_end() in TracePrintf function

    Normally the va_end function does not do anything,
    but it should be called because some platforms need it.

    [alkondratenko@gmail.com: reworded commit message]
    Signed-off-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>

M	src/debugallocation.cc

commit 497b60ef0fa93ed41ccacf6ffd0d536789401d29
Author: Vladimir <Volodimir.Krylov@gmail.com>
Date:	Fri Jul 14 15:13:32 2017 +0300

    Implemented GetProgramInvocationName on FreeBSD

    Few lines of code was taken from
    /usr/src/contrib/libexecinfo/backtrace.c

    [alkondratenko@gmail.com: updated commit message
    Signed-off-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>

M	src/symbolize.cc

commit ac072a3fc768b9699b1e809a379f576aa3e48983
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Sep 23 14:55:33 2017 -0700

    Revert "Ignore current_instance heap allocation when leak sanitizer
    is enabled"

    This reverts commit 70a35422b5509a456584b132ad8ce4466af323ea.

M	Makefile.am
M	src/malloc_extension.cc

commit fb5987d57913867e3b0f20490461ea55bfabe9ee
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Sep 23 14:55:20 2017 -0700

    Revert "Ensure that lsan flags are appended on all necessary targets"

    This reverts commit a3bf61ca81b68e7792739c451aceef00cf7d7d03.

M	Makefile.am

commit 5815f02105acd5d7fd0e6ec038a9e96ccc36911f
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Sep 16 21:14:23 2017 -0700

    Use safe getenv for setting up backtrace capturing method

    This code runs very early, so using special "early" version of getenv
    is reasonable. It should fix issue #912.

M	src/stacktrace.cc

commit aab4277311759b32ae8c442b49edf002230ea165
Author: Dorin Lazăr <dorin.lazar@gmail.com>
Date:	Thu Sep 21 22:11:49 2017 +0300

    Fixed LTO warning about the mismatch between return values for
    ProfilingIsEnabledForAllThreads()

M	src/heap-checker.cc

commit d406f2285390c402e824dd28e6992f7f890dcdf9
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Aug 5 22:05:10 2017 -0700

    implement support for C11 aligned_alloc

    Just like glibc does, we simply alias it to memalign.

M	Makefile.am
M	src/libc_override_gcc_and_weak.h
M	src/libc_override_redefine.h

commit 92a27e41a137704772479277786d035763938921
Author: Piotr Sikora <piotrsikora@google.com>
Date:	Mon Aug 21 15:06:23 2017 -0700

    Fix build on macOS.

    Fixes #910.

    Signed-off-by: Piotr Sikora <piotrsikora@google.com>

M	Makefile.am

commit e033431e5a9e02e4d1882bb6fcd212c4fab56173
Author: Khem Raj <raj.khem@gmail.com>
Date:	Sun Jul 16 19:28:17 2017 -0700

    include fcntl.h for loff_t definition

    Fixes
    linux_syscall_support.h:2641:26: error: 'loff_t' has not been declared

    Signed-off-by: Khem Raj <raj.khem@gmail.com>

M	src/base/linux_syscall_support.h

commit e41bc414048eb4a37743e294bed3f1c63a1fa559
Author: Khem Raj <raj.khem@gmail.com>
Date:	Sat Jul 1 13:21:21 2017 -0700

    Use ucontext_t instead of struct ucontext

    Newer glibc has dropped the ucontext tag from exposing

    Signed-off-by: Khem Raj <raj.khem@gmail.com>

M	src/stacktrace_powerpc-linux-inl.h

commit bf840dec0495e17f5c8403e68e10b9d6bf05c559
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jul 9 14:55:33 2017 -0700

    bumped version to 2.6.1

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 2d220c7e26bd279ec87f9d1fc694ca5114b20bee
Author: Romain Geissler <romain.geissler@amadeus.com>
Date:	Sun Jun 18 15:21:19 2017 +0200

    Replace "throw()" by "PERFTOOLS_NOTHROW"

    Automatically done with:
    sed -e 's/\<throw[[:space:]]*([[:space:]]*)/PERFTOOLS_NOTHROW/g' -i
    $(git grep -l 'throw[[:space:]]*([[:space:]]*)')

    [alkondratenko@gmail.com: updated to define empty PERFTOOLS_NOTHROW
    only on pre-c++11 standards]

M	src/libc_override_gcc_and_weak.h
M	src/libc_override_redefine.h
M	src/tcmalloc.cc
M	src/windows/get_mangled_names.cc

commit c4de73c0e69b9a75b6795fdd4598234baed8496d
Author: Romain Geissler <romain.geissler@amadeus.com>
Date:	Sun Jun 18 15:16:16 2017 +0200

    Add PERFTOOLS_THROW where necessary (as detected by GCC).

M	src/base/basictypes.h
M	src/libc_override_gcc_and_weak.h
M	src/tests/tcmalloc_unittest.cc

commit e5fbd0e24e19bf3c9a8777cfc78e6188c5557025
Author: Romain Geissler <romain.geissler@amadeus.com>
Date:	Sun Jun 18 15:05:46 2017 +0200

    Rename PERFTOOLS_THROW into PERFTOOLS_NOTHROW.

    Automatically done with:
    sed -e 's/\<PERFTOOLS_THROW\>/PERFTOOLS_NOTHROW/g' -i $(git grep
    -l PERFTOOLS_THROW)

M	src/debugallocation.cc
M	src/gperftools/tcmalloc.h.in
M	src/tcmalloc.cc
M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in

commit eeb7b84c20146c0e2e039ce72a2ea083a94ba80d
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Jul 8 15:23:37 2017 -0700

    Register tcmalloc atfork handler as early as possible

    This is what other mallocs do (glibc malloc and jemalloc). The idea is
    malloc is usually initialized very eary. So if we register atfork
    handler at that time, we're likely to be first. And that makes our
    atfork handler a bit safer, since there is much less chance of some
    other library installing their "take all locks" handler first and
    having fork take malloc lock before library's lock and deadlocking.

    This should address issue #904.

M	src/static_vars.cc
M	src/static_vars.h
M	src/thread_cache.cc

commit 208c26caeff24fd8c1defea80cb723ec1ab4bf06
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Tue Jul 4 19:50:04 2017 -0700

    Add initial syscall support for mips64 32-bit ABI

    This applies patch by Adhemerval Zanella from
    https://github.com/gperftools/gperftools/issues/845.

    Only malloc (i.e. tcmalloc_minimal) was tested to work so far.

M	src/base/linux_syscall_support.h
M	src/malloc_hook_mmap_linux.h

commit a3bf61ca81b68e7792739c451aceef00cf7d7d03
Author: Francis Ricci <francisjricci@gmail.com>
Date:	Wed Jul 5 12:39:41 2017 -0400

    Ensure that lsan flags are appended on all necessary targets

M	Makefile.am

commit 97646a193237af0f941e5bd3078eb72edbc2d548
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Tue Jul 4 21:02:34 2017 -0700

    Add missing NEWS entry for recent 2.6 release

    Somehow I managed to miss this last commit in 2.6 release. So lets add
    it now even if it is too late.

M	NEWS

commit 4be05e43a1adab9ceea9bdaaae546fb938f0a86c
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Tue Jul 4 20:35:25 2017 -0700

    bumped version up to 2.6

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 70a35422b5509a456584b132ad8ce4466af323ea
Author: Francis Ricci <francisjricci@gmail.com>
Date:	Thu Jun 15 11:04:33 2017 -0400

    Ignore current_instance heap allocation when leak sanitizer is enabled

    Without this patch, any user program that enables LeakSanitizer will
    see a leak from tcmalloc. Add a weak hook to __lsan_ignore_object,
    so that if LeakSanitizer is enabled, the allocation can be ignored.

M	Makefile.am
M	src/malloc_extension.cc

commit 6eca6c64fabbff55c43a78537e466312524b3acd
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Jul 1 18:48:58 2017 -0700

    Revert "issue-654: [pprof] handle split text segments"

    This reverts commit 8c3dc52fcfe02412a529769a22cbc75388a5d368.

    People have reported issues with this so lets stay safe and use older
    even if less powerful code.

M	src/pprof

commit a495969cb6157cc361fc03228ae12ff7c0ecac4b
Author: KernelMaker <songzhao.asm@icloud.com>
Date:	Wed May 24 16:46:49 2017 +0800

    update the prev_class_size in each loop, or the min_object_size of
    tcmalloc.thread will always be 1 when calling GetFreeListSizes

M	src/tcmalloc.cc

commit 163224d8af5abdbbd8208ad6d37f13fb450af46f
Author: Kim Gräsman <kim.grasman@gmail.com>
Date:	Fri May 26 13:09:03 2017 +0200

    Document HEAPPROFILESIGNAL environment variable

M	docs/heapprofile.html

commit 5ac82ec5b96d24219efd4c8aec47a45466eabd00
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon May 29 13:07:39 2017 -0700

    added stacktrace capturing benchmark

M	.gitignore
M	Makefile.am
A	benchmark/getcontext_light.cc
A	benchmark/unwind_bench.cc

commit c571ae2fc9433e958f29b3c3525d34c22a9cb884
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon May 22 19:04:20 2017 -0700

    2.6rc4

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit f2bae51e7e609855c26095f14ffbb84082694acb
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon May 22 18:58:15 2017 -0700

    Revert "Revert "disable dynamic sized delete support by default""

    This reverts commit b82d89cb7c8781a6028f6f5959cabdc5a273aec3.

    Dynamic sized delete support relies on ifunc handler being able to
    look up environment variable. The issue is, when stuff is linked with
    -z now linker flags, all relocations are performed early. And sadly
    ifunc relocations are not treated specially. So when ifunc handler
    runs, it cannot rely on any dynamic relocations at all, otherwise
    crash is real possibility. So we cannot afford doing it until (and if)
    ifunc is fixed.

    This was brought to my attention by Fedora people at
    https://bugzilla.redhat.com/show_bug.cgi?id=1452813

M	configure.ac

commit 6426c0cc8049dd50a681dc337ac9962577d5fa14
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun May 21 22:55:29 2017 -0700

    2.6rc3

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 0c0e2fe43b5095d19470abdc3b4d83613fe37c6d
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon May 22 02:39:29 2017 -0700

    enable 48-bit page map on msvc as well

M	src/common.h

commit 83d6818295cb337b6201fe307e15755df9dcd47f
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon May 22 02:38:13 2017 -0700

    speed up 3-level page map access

    There is no need to have pointer indirection for root node. This also
    helps the case of early free of garbage pointer because we didn't
    check root_ pointer for NULL.

M	src/pagemap.h

commit f7ff175b92df5577aef9caf3fb02f9ff37b822ca
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun May 21 23:28:48 2017 -0700

    add configure-time warning on unsupported backtrace capturing

    Both libgcc and libc's backtrace() are not really options for stack
    trace capturing from inside profiling signal handler. So lets warn
    people.

M	configure.ac

commit cef582350c952bad761476d01ea64bb4087371ce
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun May 21 23:15:59 2017 -0700

    align fast-path functions only if compiler supports that

    Apparently gcc only supports __attribute__((aligned(N))) on functions
    only since version 4.3. So lets test it in configure script and only
    use when possible. We now use CACHELINE_ALIGNED_FN macro for aligning
    functions.

M	configure.ac
M	src/base/basictypes.h
M	src/tcmalloc.cc

commit bddf862b189c4508d5212f6e0e8ea81c4dd18811
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun May 21 22:24:19 2017 -0700

    actually support very early freeing of NULL

    This was caught by unit tests on centos 5. Apparently some early
    thingy is trying to do vprintf which calls free(0). Which used to
    crash since before size class cache is initialized it'll report
    hit (with size class 0) for NULL pointer, so we'd miss the case of
    checking NULL pointer free and crash.

    The fix is to check for IsInited in the case when thread cache is
    null, and if so then we escalte to free_null_or_invalid.

M	src/tcmalloc.cc
M	src/thread_cache.cc

commit 07a124d8c16bc7d52524ceb9f50d7a65b868e129
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun May 21 22:22:21 2017 -0700

    don't use arg-ful constructor attribute for early nallocx test

    101 is not very early anyways and arg-ful constructor attribute is
    only supported since gcc 4.3 (and e.g. rhel 5's compiler fails to
    compile it). So there seems to be very little value trying to ask for
    priority of 101.

M	src/tests/tcmalloc_unittest.cc

commit 5346b8a4def33915e6f877e308fb948f570a6120
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun May 21 22:18:01 2017 -0700

    don't depend on SIZE_MAX definition in sampler.cc

    It was reported that SIZE_MAX isn't getting defined in C++ mode when
    C++ standard is less than c++11. Because we still want to support
    non-c++11 systems (for now), lets make it simple and not depend on
    SIZE_MAX (original google-internal code used
    std::numeric_limits<ssize_t>::max, but that failed to compile on
    msvc).

    Fixes issue #887 and issue #889.

M	src/sampler.cc

commit 50125d8f70007fb2aa4d1c87df6a3092a3371edf
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon May 15 00:02:43 2017 -0700

    2.6rc2

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit a5e8e42a47fc0175c8044d0d77bf192b03347964
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun May 14 23:45:08 2017 -0700

    don't link-in libunwind if libunwind.h is missing

    I got report that some build environments for
    https://github.com/lyft/envoy are having link-time issue due to
    linking libunwind. It was happening despite libunwind.h being present,
    which is clear bug as without header we won't really use libunwind.

M	configure.ac

commit e92acdf98db229e8dc84993fd8895d55e6c69129
Author: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
Date:	Wed Apr 26 06:46:43 2017 -0300

    Fix compilation error for powerpc32

    Fix the following compilation error for powerpc32 platform when using
    latest glibc.
    error: ‘siginfo_t’ was not declared in this scope

M	src/stacktrace_powerpc-linux-inl.h

commit b48403a4b065830129e238feffe022abd93af807
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Apr 16 21:45:51 2017 -0700

    2.6rc

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 53f15325d93fbe0ba17bb3fac3da86ffd3f0f1ad
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun May 14 20:24:27 2017 -0700

    fix compilation of tcmalloc_unittest.cc on older llvm-gcc

M	src/tests/tcmalloc_unittest.cc

commit b1d88662cb4a38ee47aa48076745898033526f9d
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Apr 2 19:27:00 2017 -0700

    change size class to be represented by 32 bit int

    This moves code closer to Google-internal version and provides for
    slightly tighter code encoding on amd64.

M	src/common.h
M	src/packed-cache-inl.h
M	src/page_heap.cc
M	src/page_heap.h
M	src/tcmalloc.cc
M	src/tests/packed-cache_test.cc
M	src/thread_cache.cc
M	src/thread_cache.h

commit 991f47a159f0e169883f06686f13c31688fa2bf0
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Thu Feb 2 15:58:08 2017 -0800

    change default transfer batch back to 32

    Some tensorflow benchmarks are seeing large regression with elevated
    values. So lets stick to old safe default until we understand how
    to make
    larger values work for all workloads.

M	src/common.cc

commit 7bc34ad1f60be2df6ca38f4bffdba4daa9aa9a7d
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Thu Feb 2 15:38:41 2017 -0800

    support different number of size classes at runtime

    With TCMALLOC_TRANSFER_NUM_OBJ environment variable we can change
    transfer batch size. And with that comes slightly different number of
    size classes depending on value of transfer batch size.

    We used to have hardcoded number of size classes, so we couldn't
    really support any batch size setting.

    This commit adds support for dynamic number of size classes (runtime
    value returned by Static::num_size_classes()).

M	src/central_freelist.cc
M	src/common.cc
M	src/common.h
M	src/page_heap.cc
M	src/static_vars.cc
M	src/static_vars.h
M	src/tcmalloc.cc
M	src/thread_cache.cc
M	src/thread_cache.h

commit 4585b78c8dae9183dbf5f124c0343a9f1244ed67
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Tue Feb 21 00:27:39 2017 -0800

    massage allocation and deallocation fast-path for performance

    This is significant speedup of fast-path of malloc. Large part comes
    from avoiding expensive function prologue/epilogue. Which is achieved
    by making sure that tc_{malloc,new,free} etc are small functions that
    do only tail-calls. We keep only critical path in those functions and
    tail-call to slower "full" versions when we need to deal with less
    common case. This helps compiler generate much tidier code.

    Fast-path readyness check is now different too. We used to have "min
    size for slow path" variable, which was set to non-zero value when we
    know that thread cache is present and ready. We now have use
    thread-cache pointer not equal to NULL as readyness check.

    There is special ThreadCache::threadlocal_data_.fast_path_heap copy of
    that pointer that can be temporarily nulled to disable malloc fast
    path. This is used to enable emergency malloc.

    There is also slight change to tracking thread cache size. Instead of
    tracking total size of free list, it now tracks size headroom. This
    allows for slightly faster deallocation fast-path check where we're
    checking headroom to stay above zero. This check is a bit faster than
    comparing with max_size_.

M	src/linked_list.h
M	src/tcmalloc.cc
M	src/thread_cache.cc
M	src/thread_cache.h
M	src/windows/patch_functions.cc

commit 5964a1d9c98ea3c178435ff01f9b06e03eeda58d
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Tue Feb 21 00:42:29 2017 -0800

    always inline a number of hot functions

M	src/page_heap.h
M	src/pagemap.h
M	src/tcmalloc.cc
M	src/thread_cache.h

commit e419b7b9a66c39b44115b01520fb25a5100cec83
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 21:11:14 2017 -0800

    introduce ATTRIBUTE_ALWAYS_INLINE

M	src/base/basictypes.h
M	src/tcmalloc.cc

commit 7d588da7ec4f315ea2d02824d7e8813b0f95171d
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Dec 18 18:36:57 2016 -0800

    synchronized Sampler implementation with Google-internal version

    This is mostly dropping FastLog2 which was never necessary for
    performance, and making sampler to be called always, even if sampling
    is disabled (this benefits more for always-sampling case of Google
    fork).

    We're also getting TryRecordAllocationFast which is not used yet, but
    will be as part of subsequent fast-path speedup commit.

M	src/sampler.cc
M	src/sampler.h
M	src/static_vars.cc
M	src/tests/sampler_test.cc
M	src/thread_cache.h

commit 27da4ade70d45312bfdf334aa8cf0d63bf78df14
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Tue Feb 21 00:41:43 2017 -0800

    reduce size of class_to_size_ array

    Since 32-bit int is enough and accessing smaller array will use a bit
    less of cache.

M	src/common.h
M	src/tcmalloc.cc
M	src/thread_cache.cc
M	src/thread_cache.h

commit 335f09d4e43a8413642e17e5ac374f925906c4e3
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 23:49:15 2017 -0800

    use static location for pageheap

    Makes it a bit faster to access, since we're dropping pointer
    indirection.

M	src/static_vars.cc
M	src/static_vars.h

commit 6ff332fb517734cf01e86272fe37521b7155c995
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 23:37:33 2017 -0800

    move size classes map earlier in SizeMap

    Since we access them more often, having at least one of them at offset
    0 makes pi{c,e} code a bit smaller.

M	src/common.h

commit 121b1cb32e7416ecb7b0c739588f1bd916c4913a
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 22:57:43 2017 -0800

    slightly faster size class cache

    Lower bits of page index are still used as index into hash
    table. Those lower bits are zeroed, or-ed with size class and
    placed into hash table. So checking is just loading value from hash
    table, xoring with higher bits of address and checking if resultant
    value is lower than 128. Notably, size class 0 is not considered
    "invalid" anymore.

M	src/central_freelist.cc
M	src/packed-cache-inl.h
M	src/page_heap.cc
M	src/page_heap.h
M	src/tcmalloc.cc
M	src/tests/packed-cache_test.cc

commit b57c0bad41700238f524b28483a1c6c18c0a621f
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Apr 16 23:15:16 2017 -0700

    init tcmalloc prior to replacing system alloc

    Currently on windows, we're depending on uninitialized tcmalloc
    variables to detect freeing foreign malloc's chunks. This works
    somewhat by chance due to 0-initialized size classes cache working as
    cache with no values. But this is about to change, so lets do explicit
    initialization.

M	src/tcmalloc.cc

commit 71fa9f873065e3d7c1f4ce0581d26b6498712f00
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 21:17:48 2017 -0800

    use 2-level page map for 48-bit addresses

    48 bits is size of x86-64 and arm64 address spaces. So using 2 levels
    map for them is slightly faster. We keep 3 levels for small-but-slow
    configuration, since 2 levels consume a bit more memory.

    This is partial port of Google-internal commit by Sanjay
    Ghemawat (same idea, different implementation).

M	src/page_heap.h
M	src/pagemap.h

commit bad70249dd5c829b4981aecdc25953800d6745c3
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 21:12:58 2017 -0800

    use 48-bit addresses on 64-bit arms too

M	src/common.h

commit 5f12147c6dbfe2cfbdc7553521fe0110073135f0
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 21:03:58 2017 -0800

    use hidden visibility for some key global variables

    So that our -fPIC code is faster

M	src/base/basictypes.h
M	src/static_vars.h

commit dfd53da578137d5962fe8d588980870bb0ab8aa9
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jan 22 21:08:51 2017 -0800

    set ENOMEM in handle_oom

M	src/tcmalloc.cc

commit 14fd551072426cef317f43d587f91004d4fdae75
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jan 8 06:02:04 2017 +0300

    avoid O(N²) in thread cache creation code

M	src/thread_cache.cc

commit 507a105e849422d5ceff4348d38aaf72371a6161
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 12 14:25:10 2016 -0800

    pass original size to DoSampledAllocation

    It makes heap profiles more accurate. Google's internal malloc
    is doing
    it as well.

M	src/tcmalloc.cc

commit bb77979dea796ab743e1308af25e9259ec97f2b1
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 12 18:10:19 2016 -0800

    don't declare throw() on malloc funtions since it is faster

    Apparently throw() on functions actually asks compiler to generate
    code
    to detect unexpected exceptions. Which prevents tail calls
    optimization.

    So in order to re-enable this optimization, we simply don't tell
    compiler about throw() at all. C++11 noexcept would be even better,
    but
    it is not universally available yet.

    So we change to no exception specifications. Which at least for gcc &
    clang on Linux (and likely for all ELF platforms, if not just all)
    really eliminates all overhead of exceptions.

M	src/debugallocation.cc
M	src/gperftools/tcmalloc.h.in
M	src/tcmalloc.cc
M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in

commit 89c74cb79ca41cd75a1f9131af4ea2ab362593ae
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 12 20:26:40 2016 -0800

    handle duplicate google_malloc frames in malloc hook stack trace

    Subsequent optimization may cause multiple malloc functions in
    google_malloc section to be in call stack. Particularly when fast-path
    malloc function calls slow-path and compiler chooses to implement such
    call as regular call instead of tail-call.

    Because we need stacktrace just until first such function, once
    we find
    innermost such frame, we're simply checking if next outer frame
    is also
    google_malloc and consider it instead.

M	src/malloc_hook.cc

commit 0feb1109ac957144a50d964b0ff244a6a286174a
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 12 21:08:57 2016 -0800

    fix stack trace capturing in debug malloc

    Particularly, hardcoded skip count was relying on certain behavior of
    compiler. Namely, that tail calls inside DebugDeallocate path are not
    actually implemented as tail calls.

    New implementation is using google_malloc section as a marker
    of malloc
    boundary. But in order for this to work, we have to prevent
    tail-call in
    debugallocation's tc_XXX functions. Which is achieved by doing
    volatile
    read of static variable at the end of such functions.

M	src/debugallocation.cc

commit 0506e965ee5184490fbe7acea470458562128a79
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Dec 18 18:36:00 2016 -0800

    replace LIKELY/UNLIKELY with PREDICT_{TRUE,FALSE}

    Google-internal code is using PREDICT_TRUE/FALSE, so we should be
    doing it too.

M	src/base/basictypes.h
M	src/common.cc
M	src/common.h
M	src/emergency_malloc.h
M	src/malloc_hook-inl.h
M	src/tcmalloc.cc
M	src/thread_cache.h

commit 59a4987054021eaf24143a27cf01252fafb5052d
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Mar 13 16:04:43 2016 -0700

    prevent inlining ATTRIBUTE_SECTION functions

    So that their code is always executing in prescribed section.

M	src/base/basictypes.h

commit ebb575b8a0153a70f43fd1c3ec33fe30f94c97d0
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Thu Feb 2 15:41:13 2017 -0800

    Revert "enabled aggressive decommit by default"

    This reverts commit 7da5bd014d77ddaf694054b1e3ae0a3ef92ab384.

    Some tensorflow benchmarks are getting slower with aggressive
    decommit.

M	src/static_vars.cc
M	src/tests/tcmalloc_unittest.sh

commit b82d89cb7c8781a6028f6f5959cabdc5a273aec3
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jan 22 13:15:39 2017 -0800

    Revert "disable dynamic sized delete support by default"

    This reverts commit 06811b3ae4c5365880898148d188ae91d20f52f2.

M	configure.ac

commit fac0bb44d5661946d9839496ddf104942dd00abe
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jan 22 13:11:05 2017 -0800

    Do not depend on memchr in commandlineflags::StringToBool

    It lets us use it from inside ifunc handler.

M	src/base/commandlineflags.h

commit 7d49f015a01e35155517332a2dfd95f16b568939
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jan 22 13:08:34 2017 -0800

    Make GetenvBeforeMain work inside ifunc handler

    Depending on things such us strlen, which are ifunc-ed themselves is
    not supported from inside ifunc handler.

    Thus we implement strlen, memchr and memcmp in slow naive C++ just for
    that place.

M	src/base/sysinfo.cc

commit a2550b6309153c250f67255b6271ec988cc7d0fb
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 26 23:46:18 2017 -0800

    turn bench_fastpath_throughput into actual throughput benchmark

    Previously we bumped size by 16 between iterations, but for many size
    classess that gave is subsequent iteration into same size
    class. Multiplying by prime number randomizes sizes more so speeds up
    this benchmark on at least modern x86.

M	benchmark/malloc_bench.cc

commit b762b1a4923f769487de818175655c1683d84db5
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 12 14:12:02 2016 -0800

    added sized free benchmarks to malloc_bench

M	benchmark/malloc_bench.cc

commit 71ffc1cd6b3ea99c97ed6d0e16caeb9d1b20eec7
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 12 14:11:40 2016 -0800

    added free lists randomization step to malloc_bench

M	benchmark/malloc_bench.cc

commit 732dfeb83d726de0aea47f0e6aa2abff3e0ad680
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jan 22 13:57:31 2017 -0800

    Run StartStopNoOptionsEmpty profiledata unittest

    Somehow we had this test, but didn't arrange to actually run it. GCC
    gave warning and now we do.

M	src/tests/profiledata_unittest.cc

commit cbb312fbe8022378c4635b3075a80a7827555170
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Dec 18 11:08:54 2016 -0800

    aggressive decommit: only free necessary regions and fix O(N²)

    We used to decommit (with MADV_FREE or MADV_DONTNEED) whole combined
    span when freeing span in aggressive decommit mode. The issue with
    that is preceding or following span with which we combined span we're
    freeing could be freed already and fairly large. By passing all of
    that memory to decommit, we force kernel to scan all of those pages.

    When mass-freeing many objects old behavior led to O(N^2) behavior
    since freeing single span could lead to MADV_{FREE,DONTNEED}-ing of
    most of the heap.

    New implementation just does decommit of individual bits as needed.

    While there, I'm also adding locking to calls of
    PageHeap::{Get,Set}AggressiveDecommit.

    This partially (or mostly) fixes issue #839.

M	src/page_heap.cc
M	src/page_heap.h
M	src/tcmalloc.cc

commit 6d98223a9035ec1c5e9a7eb0196b21021d48a41f
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 12 17:12:44 2017 -0800

    don't build with -fno-exceptions

    It looks like, in past it could produce better code. But since
    unwinding is totally different since almost forever now, there is no
    perfomance benefit of it anymore.

M	Makefile.am

commit d6a1931cce303ea279b744c9b438686e4f5994e5
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 12 15:33:10 2016 -0800

    fixed warning in casting heap of checker's main_thread_counter

    I.e. compiler didn't like int to void * casting and upcasting to
    intptr_t first (which has same size as void *) makes it happier.

M	src/heap-checker.cc

commit 5c778701d98c642ecff97d044cd1c0b8b862aba3
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 12 17:54:59 2017 -0800

    added tcmalloc minimal unittest with ASSERTs checked

M	.gitignore
M	Makefile.am

commit a9167617abbcebe9d472141c53a20ce00c8c8d75
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Apr 29 19:09:47 2017 -0700

    drop unused g_load_map variable in patch_functionc.cc

M	src/windows/patch_functions.cc

commit d52e56dcb5aad0521ccc67d7e57dfcb8d41ea568
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Apr 29 19:06:55 2017 -0700

    don't compare integer to NULL

M	src/windows/preamble_patcher.cc

commit bae00c0341f49ade473d24c117226552a59d3e75
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Apr 23 20:33:16 2017 -0700

    add fake_stacktrace_scope to few msvc projects

    Otherwise it predictably fails at linking phase due to missing
    symbols.

M
vsprojects/low_level_alloc_unittest/low_level_alloc_unittest.vcproj
M	vsprojects/tmu-static/tmu-static.vcproj

commit 79aab4fed40f9aac03dacb32a108861eff689beb
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Apr 16 22:17:56 2017 -0700

    correctly dllexport nallocx on windows

M	src/gperftools/nallocx.h
M	src/tcmalloc.cc

commit b010895a088703f512cb0e225c838306b2904069
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Apr 30 18:32:10 2017 -0700

    don't undef PERFTOOLS_DLL_DECL

    This is not necessary and will help adding more headers with
    dll-exported functions.

M	src/gperftools/tcmalloc.h.in
M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in

commit 491b1aca7edbbaed9ea6f7baaa547a35cf385130
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Apr 29 16:46:21 2017 -0700

    don't try to use pthread_atfork on windows

M	src/maybe_threads.cc
M	src/windows/mingw.h

commit 691045b95761bedb9170d758be82f9b2f15c673a
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 12 14:41:28 2016 -0800

    suppress warnings from legacy headers while building legacy headers
    test

M	src/google/heap-checker.h
M	src/google/heap-profiler.h
M	src/google/malloc_extension.h
M	src/google/malloc_extension_c.h
M	src/google/malloc_hook.h
M	src/google/malloc_hook_c.h
M	src/google/profiler.h
M	src/google/stacktrace.h
M	src/google/tcmalloc.h
M	src/tests/simple_compat_test.cc

commit 22f7ceb97a63bcbc9d824a80916bb7a809fad1f2
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Apr 29 15:25:06 2017 -0700

    use unsigned for few flags in mini_disassembler_types.h

    We're initializing them with value that doesn't fit into signed 32-bit
    int and somehow mingw version that I have not just warns, but actually
    errors on that.

M	src/windows/mini_disassembler_types.h

commit 9b17a8a5ba1c8320d12c6e6df0ab54ff218b50e6
Author: Mostyn Bramley-Moore <mostynb@opera.com>
Date:	Thu May 11 20:40:18 2017 +0200

    remove superfluous size_t value >= 0 check

M	src/debugallocation.cc

commit 86ce69d77ff5f881c5701901bf7d1ef884f9e33a
Author: Eugene <n.eugene536@gmail.com>
Date:	Sat Feb 4 17:57:34 2017 +0300

    Update binary_trees.cc

M	benchmark/binary_trees.cc

commit cd8586ed6c8bed550ad727ce8af83a1a6bd1ca8e
Author: Ola Olsson <ola1olsson@gmail.com>
Date:	Tue Mar 21 14:07:16 2017 +0100

    Fix path names in README

M	README

commit 98753aa73772bb0fae8cee668e513d5754ab7737
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 16:04:14 2017 -0800

    test that sized deallocation really works before enabling it

    Weirdly, some OSX compiler does allow -fsized-deallocation, yet barks
    on any attempt to actually use it at compile time (!). So lets detect
    this as well in configure and opt out as necessary.

    Should fix issue #870.

M	configure.ac

commit 5618ef78505a854bd0d2c145fd9cf7967226a20e
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 15:31:41 2017 -0800

    Don't assume memalign exists in memalign vs nallocx test

    OSX and windows have issues with memalign. So test against tc_memalign
    instead.

    This should fix _memalign linker-time part of issue #870.

M	src/tests/tcmalloc_unittest.cc

commit bf640cd740fe38f6f10faa8683e8361fee971aba
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 14:51:27 2017 -0800

    rename sys allocator's sys_alloc symbol to tcmalloc_sys_alloc

    Since we're not building with hidden visibility, symbols of other DSOs
    can interpose our symbols. And sys_alloc is just too generic name.

    And in fact erlang runtime has sys_alloc function. Which means we're
    trying to write to it's first bytes as part of initializing system
    allocator and crash.

    This should fix issue #843.

M	src/system-alloc.cc
M	src/system-alloc.h
M	src/tcmalloc.cc
M	src/windows/system-alloc.cc

commit 069e3b16551186f8da0a41c185550fdfd11af35b
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 20 14:25:18 2017 -0800

    build malloc_bench_shared_full only when full tcmalloc is built

    I.e. because otherwise, when --enable-minimal is given, we're building
    empty libtcmalloc.la and linking it to malloc_bench_shared_full. Which
    has no effect at all and actually breaks builds on OSX.

    Should fix issue #869.

M	Makefile.am

commit b8f9d0d44f94177d34b069180618b7d002e85b69
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Dec 18 09:35:02 2016 -0800

    ported nallocx support from Google-internal tcmalloc

    nallocx is extension introduced by jemalloc. It returns effective size
    of allocaiton without allocating anything.

    We also support MALLOCX_LG_ALIGN flag. But all other jemalloc
    flags (which at the moment do nothing for nallocx anyways) are
    silently ignored, since there is no sensible way to return errors in
    this API.

    This was originally contributed by Dmitry Vyukov with input from
    Andrew Hunter. But due to significant divergence of Google-internal
    and free-software forks of tcmalloc, significant massaging was done by
    me. So all bugs are mine.

M	Makefile.am
A	src/gperftools/nallocx.h
M	src/tcmalloc.cc
M	src/tests/tcmalloc_unittest.cc

commit b0abefd93834d9d9c7ffaae2d23bd48ed8e96477
Author: Andrew Morrow <acm@mongodb.com>
Date:	Sat Dec 17 13:57:41 2016 -0500

    Fix a typo in the page fence flag declaration

M	src/debugallocation.cc

commit 855b3800064db49af823b85a54be269923eb6f4d
Author: Kirill Müller <krlmlr@mailbox.org>
Date:	Tue Nov 15 09:58:11 2016 +0100

    replace docs by doc

M	Makefile.am
M	README
D	doc
M	packages/deb/docs
M	packages/deb/libgperftools0.manpages
M	src/gperftools/heap-checker.h
M	src/gperftools/heap-profiler.h
M	src/gperftools/profiler.h
M	src/profiledata.h
M	src/tcmalloc.cc

commit 664210ead806d700cdbe5eeaf75d7a066fdac541
Author: Kirill Müller <krlmlr@mailbox.org>
Date:	Tue Nov 15 09:42:12 2016 +0100

    doc -> docs, with symlink

A	doc
R100	doc/cpuprofile-fileformat.html	docs/cpuprofile-fileformat.html
R100	doc/cpuprofile.html	docs/cpuprofile.html
R100	doc/designstyle.css	docs/designstyle.css
R100	doc/heap-example1.png	docs/heap-example1.png
R100	doc/heap_checker.html	docs/heap_checker.html
R100	doc/heapprofile.html	docs/heapprofile.html
R100	doc/index.html	docs/index.html
R100	doc/overview.dot	docs/overview.dot
R100	doc/overview.gif	docs/overview.gif
R100	doc/pageheap.dot	docs/pageheap.dot
R100	doc/pageheap.gif	docs/pageheap.gif
R100	doc/pprof-test-big.gif	docs/pprof-test-big.gif
R100	doc/pprof-test.gif	docs/pprof-test.gif
R100	doc/pprof-vsnprintf-big.gif	docs/pprof-vsnprintf-big.gif
R100	doc/pprof-vsnprintf.gif docs/pprof-vsnprintf.gif
R100	doc/pprof.1	docs/pprof.1
R100	doc/pprof.see_also	docs/pprof.see_also
R100	doc/pprof_remote_servers.html	docs/pprof_remote_servers.html
R100	doc/spanmap.dot docs/spanmap.dot
R100	doc/spanmap.gif docs/spanmap.gif
R100	doc/t-test1.times.txt	docs/t-test1.times.txt
R100	doc/tcmalloc-opspercpusec.vs.threads.1024.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.1024.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.128.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.128.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.131072.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.131072.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.16384.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.16384.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.2048.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.2048.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.256.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.256.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.32768.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.32768.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.4096.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.4096.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.512.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.512.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.64.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.64.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.65536.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.65536.bytes.png
R100	doc/tcmalloc-opspercpusec.vs.threads.8192.bytes.png
docs/tcmalloc-opspercpusec.vs.threads.8192.bytes.png
R100	doc/tcmalloc-opspersec.vs.size.1.threads.png
docs/tcmalloc-opspersec.vs.size.1.threads.png
R100	doc/tcmalloc-opspersec.vs.size.12.threads.png
docs/tcmalloc-opspersec.vs.size.12.threads.png
R100	doc/tcmalloc-opspersec.vs.size.16.threads.png
docs/tcmalloc-opspersec.vs.size.16.threads.png
R100	doc/tcmalloc-opspersec.vs.size.2.threads.png
docs/tcmalloc-opspersec.vs.size.2.threads.png
R100	doc/tcmalloc-opspersec.vs.size.20.threads.png
docs/tcmalloc-opspersec.vs.size.20.threads.png
R100	doc/tcmalloc-opspersec.vs.size.3.threads.png
docs/tcmalloc-opspersec.vs.size.3.threads.png
R100	doc/tcmalloc-opspersec.vs.size.4.threads.png
docs/tcmalloc-opspersec.vs.size.4.threads.png
R100	doc/tcmalloc-opspersec.vs.size.5.threads.png
docs/tcmalloc-opspersec.vs.size.5.threads.png
R100	doc/tcmalloc-opspersec.vs.size.8.threads.png
docs/tcmalloc-opspersec.vs.size.8.threads.png
R100	doc/tcmalloc.html	docs/tcmalloc.html
R100	doc/threadheap.dot	docs/threadheap.dot
R100	doc/threadheap.gif	docs/threadheap.gif

commit 75dc9a6e1470fa82b828f9687edad48f53d740b1
Author: zmertens <zmertens@asu.edu>
Date:	Fri Nov 18 15:27:32 2016 -0700

    Fix Post(s)cript tyos

M	doc/pprof.1
M	src/pprof

commit dde32f8bbc95312379f9f5a651799815bb6327c5
Author: Francis Ricci <fjricci@fb.com>
Date:	Tue Oct 11 11:14:06 2016 -0700

    Fix unaligned memory accesses in debug allocator

M	src/base/basictypes.h
M	src/debugallocation.cc

commit 02eeed29df112728564a5dde6417fa4622b57a06
Author: Ryan Macnak <rmacnak@google.com>
Date:	Tue Sep 27 14:03:05 2016 -0700

    Fix redefinition of mmap on aarch64.

M	src/base/linux_syscall_support.h

commit c07a15cff4b904ac45e4019f8e36eeffd3e8186c
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Sep 24 18:56:22 2016 -0700

    [windows] patch _free_base as well

    Looks like _free_base is used as generic free/delete, which is not
    checked for free/delete mismatch by their debug runtime. Issue #817
    occurs because something that is allocated by regular allocation
    functions (new or malloc) is freed by _free_base. Patch it as
    well fixes
    the problem.

    Closes #817.

M	src/windows/patch_functions.cc

commit acac6af26b0ef052b39f61a59507b23e9703bdfa
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Sep 24 16:19:27 2016 -0700

    Fix finding default zone on macOS sierra

    This is taken from jemalloc patch at
    https://github.com/jemalloc/jemalloc/pull/427/commits/19c9a3e828ed46f1576521c264640e60bd0cb01f
    by Mike Hommey (aka glandium).

    The issue was reported together with advise to take that jemalloc
    fix by
    Koichi Shiraishi and David Ribeiro Alves at gperftools issue #827.

    Closes issue #827.

M	src/libc_override_osx.h

commit 7822b5b0b9fa7e016e1f6b46ea86f26f4691a457
Author: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
Date:	Mon Aug 8 13:50:10 2016 -0300

    Stop using glibc malloc hooks

    glibc deprecated malloc hooks in 2011 and will be removing them soon.
    These hooks aren't safe and aren't necessary when the malloc API is
    fully exported.

M	configure.ac
M	src/libc_override_glibc.h

commit c92f0ed0891d69888cdc7e904c82048362b2dd8d
Author: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
Date:	Wed Jul 27 17:15:52 2016 -0300

    Remove references to __malloc_initialize_hook

    __malloc_initialize_hook has been deprecated in glibc since 2011
    and is
    being removed on glibc 2.24.

M	src/libc_override_glibc.h

commit 9709eef361aa8c46d6b14c08bebead7b8185e731
Merge: eb474c9 44f276e
Author: Aliaksey Kandratsenka (aka Aliaksei Kandratsenka)
<alkondratenko@gmail.com>
Date:	Wed Aug 24 22:33:05 2016 -0700

    Merge pull request #821 from jtmcdole/patch-1

    Rename TCMALLOC_DEBUG to PERFTOOLS_VERBOSE

commit 44f276e132eef8ba013a04b4af92ce26464e2b54
Author: John McDole <jtmcdole@gmail.com>
Date:	Wed Aug 24 17:47:28 2016 -0700

    Rename TCMALLOC_DEBUG to PERFTOOLS_VERBOSE

M	README

commit eb474c995eadef3edb47bc081f09693228832794
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jul 3 18:20:32 2016 -0700

    Summary: support gcc atomic ops on clang too

    Clang actually does support __atomic_XXX atomic ops builtins but does
    not advertise itselt as gcc 4.7 or later. So we now detect clang
    separetely.

    We're enabling gcc atomic ops on clang >= 3.4 since this is the oldest
    version that I can test.

    This should fix issue #797.

M	src/base/atomicops.h

commit 7f86eab1f3e0636a79a96fd44e3bb51db0457a86
Author: Kenton Varda <kenton@sandstorm.io>
Date:	Thu Jun 30 18:32:39 2016 -0700

    Recognize .node files as shared libraries

    node.js extensions are regular shared libraries named with the `.node`
    extension. With this small change I was able to get a usable heap
    profile out of node to debug an extension I'm working on.

M	src/pprof

commit bf8eacce69df877d1cecdab8c7a6cc3f218ebcc2
Author: Bryan Chan <bryanpkc@gmail.com>
Date:	Wed Jun 15 00:10:45 2016 -0400

    Add support for 31-bit s390; merge linux_syscall_support.h changes
    from upstream.

M	configure.ac
M	m4/pc_from_ucontext.m4
M	src/base/basictypes.h
M	src/base/linux_syscall_support.h
M	src/base/linuxthreads.h
M	src/getpc.h
M	src/malloc_hook_mmap_linux.h

commit c54218069b96e5a64e81186cd14107bf6660b61d
Author: savefromgoogle <savefromgoogle@users.noreply.github.com>
Date:	Sat May 14 17:50:34 2016 +0200

    Update README

    typo corrected and direct link to Google Group mailinglist added

M	README

commit 06f4ce65c226e2bed432119bd830a478012ea336
Author: iivlev <iivlev@productengine.com>
Date:	Fri Apr 15 17:46:25 2016 +0300

    Small performance tweak: avoid calling time() if we don't need it

M	src/heap-profiler.cc

commit db8d4836091b93100b176e8cab4e842974234e4e
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Jun 25 16:24:40 2016 -0700

    Autogenerate ChangeLog from git on make dist

    This fixes build breakage introduced in preceding commit for issue
    #796.

A	ChangeLog
M	Makefile.am
M	configure.ac
A	m4/ax_generate_changelog.m4

commit 4a1359831938b5a71b2faf38c02003053af253d9
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Jun 25 16:12:48 2016 -0700

    renamed ChangeLog to ChangeLog.old

    I.e. to avoid confusion. This should fix issue #796.

R100	ChangeLog	ChangeLog.old

commit 7852eeb75b9375cf52a7da01be044da6e915dd08
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Apr 9 13:09:18 2016 -0700

    Use initial-exec tls for libunwind's recursion flag

    If we don't do it, then reading variable calls to __tls_get_addr,
    which
    uses malloc on first call. initial-exec makes dynamic linker
    reserve tls
    offset for recusion flag early and thus avoid unsafe calls to malloc.

    This fixes issue #786.

M	src/base/basictypes.h
M	src/stacktrace_libunwind-inl.h
M	src/thread_cache.h

commit a07f9fe75af25ce388af3d4ff4514b42513d766f
Author: Mike Gaffney <mike@uberu.com>
Date:	Thu Mar 31 11:27:21 2016 -0700

    gerftools -> gperftools in readme

M	README

commit 9fd6d2687914a1f58a8ce457d6a1bd3d55ea0747
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Mar 20 12:29:40 2016 -0700

    added define to enable MADV_FREE usage on Linux

    Building with -DTCMALLOC_USE_MADV_FREE will enable usage of
    MADV_FREE on
    Linux if glibc copy of kernel headers has MADV_FREE defined.

    I.e. so that people can test this more easily.

    Affects ticket #780.

M	src/system-alloc.cc

commit 6f7a14f45e2e2e16fbbd250543f5758078e2f5f0
Author: Mathias Stearn <redbeard0531@gmail.com>
Date:	Wed Mar 16 18:22:32 2016 -0400

    Don't use MADV_FREE on Linux

    Addresses #780.

M	src/system-alloc.cc

commit 55cf6e6281f2f19ed04a6b2a90e2dcaec08e16d0
Author: Aman Gupta <aman@tmm1.net>
Date:	Mon Mar 14 12:20:40 2016 -0700

    Fix symbol resolution on OSX

    The library mapping ranges on OSX and Linux are sorted in opposite
    orders

      7f71c3323000-7f71c3339000 r-xp 00000000 09:02 29099128
      /lib/x86_64-linux-gnu/libz.so.1.2.3.4
      7f71c3339000-7f71c3538000 ---p 00016000 09:02 29099128
      /lib/x86_64-linux-gnu/libz.so.1.2.3.4
      7f71c3538000-7f71c3539000 r--p 00015000 09:02 29099128
      /lib/x86_64-linux-gnu/libz.so.1.2.3.4
      7f71c3539000-7f71c353a000 rw-p 00016000 09:02 29099128
      /lib/x86_64-linux-gnu/libz.so.1.2.3.4

    vs

      108f8d000-108f95000 r-xp 00025000 00:00 0
      /usr/local/opt/libmemcached/lib/libmemcached.11.dylib
      108f8c000-108f8d000 r-xp 00024000 00:00 0
      /usr/local/opt/libmemcached/lib/libmemcached.11.dylib
      108f68000-108f8c000 r-xp 00000000 00:00 0
      /usr/local/opt/libmemcached/lib/libmemcached.11.dylib

M	src/pprof

commit 8e858436223db7729d41304ad29a29946d47382b
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Mar 13 15:11:50 2016 -0700

    added simple .travis.yml config

A	.travis.yml

commit 05e40d29c034c0d68322e589b8d6e234f562be2e
Author: Brian Silverman <bsilver16384@gmail.com>
Date:	Tue Mar 8 15:58:02 2016 -0500

    Recognize modern Linux ARM

    Commit e580d7888154fa7f95b3cef9e18f1ce69182212b fixed the macros
    in some
    of the code but not other places.

    `make check` still fails in the same places on a Debian Jessie armhf
    system.

M	src/base/elfcore.h
M	src/base/linuxthreads.h

commit 632de2975e63f89613af9ab99bc1603a4a6332aa
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 12 11:48:20 2016 -0800

    bumped version up to 2.5

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 6682016092c735feb29021acbb8c2067fdf1a209
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 12 10:54:05 2016 -0800

    Unbreak profiling with CPUPROFILE_FREQUENCY=1

    This closes ticket #777.

    No test sadly, since it's not trivial to unittest this case. But
    fix with single-shot manual testing is better than nothing.

M	src/profile-handler.cc

commit 6ff86ff6a783a277956e45db68c6a2b729f27000
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 5 16:17:28 2016 -0800

    bumped version to 2.4.91 for 2.5rc2

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 782165fa7f2c49d6a67c2415626a1f215cc21ac2
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 5 15:47:25 2016 -0800

    build sized delete aliases even when sized-delete is disabled

    In this case we alias to regular delete. This is helpful because if we
    don't override sized delete, then apps will call version in libstdc++
    which delegates calls to regular delete, which is slower than calling
    regular delete directly.

M	configure.ac
M	src/libc_override_gcc_and_weak.h

commit 06811b3ae4c5365880898148d188ae91d20f52f2
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 5 15:08:50 2016 -0800

    disable dynamic sized delete support by default

    IFUNC relocations don't support our advanced use case (calling
    application function or looking up environment variable).

    Particularly, it doesn't work on PPC and arm when tcmalloc is linked
    with -Wl,-z,now. See RedHat's bugzilla ticket
    https://bugzilla.redhat.com/show_bug.cgi?id=1312462 for more details.

M	configure.ac

commit d4d99eb608f3d778fa301137a85cc4903a1dd33e
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Mar 5 14:53:42 2016 -0800

    unbreak compilation with visual studio

    Specifically, this commit adds missing fake_stacktrace_scope.cc
    to msvc
    build and removes undef-ing of PERFTOOLS_DLL_DECL by tcmalloc.h.

M	src/gperftools/tcmalloc.h.in
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in
M	vsprojects/libtcmalloc_minimal/libtcmalloc_minimal.vcproj

commit 126d4582c18d053452d22ce12351c5429513aabe
Author: Brian Silverman <bsilver16384@gmail.com>
Date:	Tue Mar 1 17:57:33 2016 -0500

    Call function pointers with the right type

    I think it's undefined behavior, but it's definitely weird. ubsan
    complains too.

M	src/tests/tcmalloc_unittest.cc

commit e0fa28ef7d50158b271da90f53ab3aee5ba441d8
Author: Brian Silverman <bsilver16384@gmail.com>
Date:	Tue Mar 1 17:56:32 2016 -0500

    Don't shift a type by more than its width

    It's undefined behavior, so ubsan complains.

M	src/tests/sampler_test.cc

commit a1c764d2632cc0090f31d8d56effb94a8d049b54
Author: Brian Silverman <bsilver16384@gmail.com>
Date:	Tue Mar 1 17:55:59 2016 -0500

    Initialize counters in test

M	src/tests/profile-handler_unittest.cc

commit 22123a37c236e26535d3f3fff7f31a5b6515d7d6
Author: Brian Silverman <bsilver16384@gmail.com>
Date:	Tue Mar 1 17:55:53 2016 -0500

    Don't overflow a signed integer

    It's undefined behavior and ubsan catches it.

M	src/base/low_level_alloc.cc

commit 66e1e94f38467b5c7bbfb05e3c7267f3039a2c69
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Mon Feb 29 20:09:39 2016 -0800

    added minimal "header section" to README

M	README

commit 2804b7cfee8d49d5ab98340cbf3050c0a5f57b98
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 21 20:27:48 2016 -0800

    bumped version to 2.5rc

M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit f47fefbfc1083e7efbada3e7e7d2859d31e151e7
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 21 22:38:23 2016 -0800

    updated NEWS for 2.5rc

M	NEWS

commit cef60361741e858041f4bb4d46ce00c6db89b711
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 21 23:03:41 2016 -0800

    alias same malloc/free variants to their canonical versions

    This is similar to what gcc 5 does anyways, except gcc 5 is placing
    jumps which adds a bit of overhead.

    Instead of letting gcc do it, we alias using ELF symbol aliasing. All
    free variants (tc_delete{,array}_{,nothrow}) are aliased to
    tc_free. There are 3 malloc variants that differ by oom
    handling. tc_newarray is aliased to tc_new. And tc_newarray_nothrow is
    aliased to tc_new_nothrow.

    This aliasing only happens in non-debug malloc, since debug malloc
    does
    distinguish between different variants since it needs checking for
    mismatch.

M	src/tcmalloc.cc

commit ea8d242061460309d174d9053a224cf94e65e6fe
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 21 20:16:37 2016 -0800

    Re-enable MultipleIdleNonIdlePhases test

    Which was accidentally removed as part of MarkThreadTemporarilyIdle
    support.

M	src/tests/markidle_unittest.cc

commit c9962f698b0edb37315445b33a06820f9bcf5df9
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 21 20:07:37 2016 -0800

    added maybe_emergency_malloc.h to Makefile.am

    Because without this reference it isn't packaged by make dist.

M	Makefile.am

commit 7dd4af65365d74a5d8d30d5811c26117a9192238
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 21 19:26:37 2016 -0800

    don't round up sizes for large allocation when sampling

    This closes #723.

    Since rounding up prior to sampling is introducing possibility of
    arithmetic overflow, we're just not doing it.

    It introduces some error (up to 4k), but since we're dealing with at
    least 256k allocations, we're fine.

M	src/tcmalloc.cc

commit 4f3410e759ec42cb307429222d690a81e3cd37b0
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Feb 21 13:52:47 2016 -0800

    enable emergency malloc by default on arm when using libunwind

    Because by default libunwind on arm does fopen which mallocs
    which will
    deadlock unless we enable emergency malloc.

M	configure.ac

commit 7f12051dbe1f402771a747c1192a66e7571d94f9
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jan 31 23:17:50 2016 -0800

    implemented emergency malloc

    Emergency malloc is enabled for cases when backtrace capturing
    needs to
    call malloc. In this case, we enable emergency malloc just prior to
    calling such code and disable it after it is done.

M	Makefile.am
M	configure.ac
M	src/debugallocation.cc
A	src/emergency_malloc.cc
A	src/emergency_malloc.h
A	src/emergency_malloc_for_stacktrace.cc
A	src/fake_stacktrace_scope.cc
M	src/malloc_hook.cc
A	src/maybe_emergency_malloc.h
M	src/stacktrace.cc
M	src/tcmalloc.cc
M	src/thread_cache.h

commit 3ee2360250c639f02b354820bc50efc6e104b754
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Feb 20 21:49:58 2016 -0800

    replaced invalid uses of __THROW

    We're now using it only when overriding glibc functions (such
    as malloc
    or mmap). In other cases (most importantly in public tcmalloc.h
    header)
    we're doing our own throw() to avoid possible breakage on future glibc
    changes.

M	src/debugallocation.cc
M	src/gperftools/tcmalloc.h.in
M	src/libc_override_glibc.h
M	src/libc_override_redefine.h
M	src/tcmalloc.cc
M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in

commit 013b82abcfeaa158da2490ff86d6bff5a5434d7f
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Feb 20 21:19:37 2016 -0800

    unbreak <malloc.h> inclusion in gperftools/tcmalloc.h

    We have shipped header which checked HAVE_XXX defines which we only
    defined in project-local config.h. So it could never work correctly.

    We're now doing #include <malloc.h> just like tc_mallinfo on constant
    which we detect at configure time and write into header that we
    install.

M	src/gperftools/tcmalloc.h.in

commit 19903e6f156d0ff8063880ddc5051b5dc261c1ff
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Feb 20 21:18:18 2016 -0800

    drop detection of sys/malloc.h and malloc/malloc.h

    Which we don't really need.

M	configure.ac

commit cdff090ebd7a3cef8de60109bef52251758181d7
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Feb 20 20:43:21 2016 -0800

    Fix several harmless clang warnings

M	src/common.cc
M	src/internal_logging.cc
M	src/malloc_hook.cc
M	src/tests/current_allocated_bytes_test.cc

commit 9095ed08402620b04591c2d27ca222594f0da6db
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Feb 20 20:33:27 2016 -0800

    implemented stacktrace capturing via libgcc's C++ ABI function

    Particularly _Unwind_Backtrace which seems to be gcc extension.

    This is what glibc's backtrace is commonly is using.

    Using _Unwind_Backtrace directly is better than glibc's backtrace,
    since
    it doesn't call into dlopen. While glibc does dlopen when it is
    built as
    shared library apparently to avoid link-time dependency on libgcc_s.so

M	Makefile.am
M	configure.ac
M	src/stacktrace.cc
A	src/stacktrace_libgcc-inl.h

commit 728cbe102108be8296f2485e384392a4408ce9db
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Feb 20 13:06:08 2016 -0800

    force profiler_unittest to do 'real' work

    'XOR loop' in profiler unittest wasn't 100% effective because
    it allowed
    compiler to avoid loading and storing to memory.

    After marking result variable as volatile, we're now forcing
    compiler to
    read and write memory, slowing this loops down sufficiently. And
    profiler_unittest is now passing more consistently.

    Closes #628

M	src/tests/profiler_unittest.cc

commit fff6b4fb8814b5f25d4f97889d5003537f7dcc92
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jan 31 23:14:43 2016 -0800

    Extend low-level allocator to support custom pages allocator

M	src/base/low_level_alloc.cc
M	src/base/low_level_alloc.h

commit 32d992679589ea83e044d3f8263583ae960b0b16
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jan 31 22:42:20 2016 -0800

    added malloc_bench_shared_full

M	.gitignore
M	Makefile.am

commit 00d8fa1ef8d6650f08e00f59baa22cd31b908432
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Feb 6 19:13:07 2016 -0800

    always use real throw() on operators new/delete

    Since non-glibc-s have no __THROW and lack of throw() on operators
    gives
    us warning.

M	src/libc_override_gcc_and_weak.h

commit 08e034ad5940f24f99a24630c7b71a0de728d05b
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Feb 6 16:19:54 2016 -0800

    Detect working ifunc before enabling dynamic sized delete support

    Particularly, on arm-linux and x86-64-debian-kfreebsd compilation
    fails
    due to lack of support for ifunc. So it is necessary to test at
    configure time whether ifunc is supported.

M	configure.ac

commit a788f354a0cd6de3d714a58ad3e6ae5baf806c3b
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Feb 6 16:01:25 2016 -0800

    include unistd.h for getpid in thread_lister.c

    This fixes warning produced on arm-linux.

M	src/base/thread_lister.c

commit 644a6bdbdb50b26a25e4428c43556467a6e8b5cc
Author: Bryan Chan <bryanpkc@gmail.com>
Date:	Fri Jan 22 12:26:47 2016 -0500

    Add support for Linux s390x

    This resolves gperftools/gperftools#761.

M	configure.ac
M	m4/pc_from_ucontext.m4
M	src/base/basictypes.h
M	src/base/linux_syscall_support.h
M	src/base/linuxthreads.h
M	src/malloc_hook_mmap_linux.h

commit bab7753aad44b3395a063966f32c23f632fee174
Author: Bryan Chan <bryanpkc@gmail.com>
Date:	Fri Jan 29 02:38:42 2016 -0500

    Fix typo in heap-checker-death_unittest.sh

M	src/tests/heap-checker-death_unittest.sh

commit 17182e1d3c324e8fe9cc02ce2822caa746d7d17a
Author: Simon Que <sque@chromium.org>
Date:	Fri Jan 29 18:17:16 2016 -0800

    Fix include of malloc_hook_c.h in malloc_hook.h

    malloc_hook.h includes malloc_hook_c.h as
    <gperftools/malloc_hook_c.h>.
    This requires the compiler to have designated src/gperftools as a
    standard include directory (-I), which may not always be the case.

    Instead, include it as "malloc_hook_c.h", which will search in
    the same
    directory first. This will always work, regardless of whether it was
    designated a standard include directory.

M	src/gperftools/malloc_hook.h

commit c69721b2b2ceae426c36de191dd0a6fa443c5c7a
Author: Andrew Morrow <acm@mongodb.com>
Date:	Sun Nov 22 15:19:12 2015 -0500

    Add support for obtaining cache size of the current thread and
    softer idling

M	src/gperftools/malloc_extension.h
M	src/gperftools/malloc_extension_c.h
M	src/malloc_extension.cc
M	src/tcmalloc.cc
M	src/tests/markidle_unittest.cc
M	src/thread_cache.cc
M	src/thread_cache.h

commit 5ce42e535d6b3bf6c5e41ceb9cf876a70a7e3318
Author: Brian Silverman <bsilver16384@gmail.com>
Date:	Tue Jan 26 16:53:48 2016 -0500

    Don't always arm the profiling timer.

    It causes a noticeable performance hit and can sometimes confuse GDB.

    Tested with CPUPROFILE_PER_THREAD_TIMERS=1.

    Based on an old version by mnissler@google.com.

M	src/profile-handler.cc
M	src/profile-handler.h
M	src/tests/profile-handler_unittest.cc

commit 7f801ea091e03dae7b13160f76fecce15727c9c0
Author: Duncan Sands <baldrick@free.fr>
Date:	Fri Jan 15 18:12:51 2016 +0100

    Make sure the alias is not removed by link-time optimization when
    it can prove
    that it isn't used by the program, as it might still be needed to
    override the
    corresponding symbol in shared libraries (or inline assembler for
    that matter).
    For example, suppose the program uses malloc and free but not calloc
    and is
    statically linked against tcmalloc (built with -flto) and LTO
    is done.  Then
    before this patch the calloc alias would be deleted by LTO due to
    not being
    used, but the malloc/free aliases would be kept because they are
    used by the
    program.  Suppose the program is dynamically linked with a shared
    library that
    allocates memory using calloc and later frees it by calling free.
    Then calloc
    will use the libc memory allocator, because the calloc alias was
    deleted, but
    free will call into tcmalloc, resulting in a crash.

M	src/libc_override_gcc_and_weak.h

commit 6b3e6ef5e0ab65030d116dd55dac8d64f9c72d33
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Jan 24 19:45:16 2016 -0800

    don't retain compatibility with old docdir behavior

    Since it is not really needed. And since we don't care about too
    ancient
    autoconfs.

M	configure.ac

commit ccffcbd9e988a39654fe6ec5edd6d817f266ded9
Author: Chris Mayo <aklhfex@gmail.com>
Date:	Sun Dec 27 18:55:05 2015 +0000

    support use of configure --docdir argument

    Value of docdir was being overridden in Makefile.

    Retain compatibility with old Autoconf versions that do not provide
    docdir.

M	Makefile.am
M	configure.ac

commit 050f2d28be8a63836bd74558b82be7983770a654
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Dec 12 18:27:40 2015 -0800

    use alias attribute only for elf platforms

    It was reported that clang on OSX doesn't support alias
    attribute. Most
    likely because of executable format limitations.

    New code limits use of alias to gcc-compatible compilers on elf
    platforms (various gnu and *bsd systems). Elf format is known
    to support
    aliases.

M	src/tcmalloc.cc

commit 07b0b21ddd168d977c04b1395677de71bb3e402e
Author: cyshi <wbstsa@gmail.com>
Date:	Wed Dec 2 14:47:15 2015 +0800

    fix compilation error in spinlock

M	src/base/spinlock.cc

commit e14450366abc51c7a25256615179daf0bae1de34
Author: gshirishfree <gshirishfree@gmail.com>
Date:	Mon Nov 23 11:34:13 2015 -0800

    Added better description for GetStats API

M	src/gperftools/malloc_extension.h

commit 64892ae730b704a7f3f23bd8eaeaf206901df201
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Nov 21 19:17:36 2015 -0800

    lower default transfer batch size down to 512

    Some workloads get much slower with too large batch size.

    This closes bug #678.

    binary_trees benchmark benefits from larger batch size. And I
    found that
    512 is not much slower than huge value that we had.

M	src/common.cc

commit 6fdfc5a7f40ebcff3fdaada1a2994ff54be2f9c7
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Oct 24 23:16:45 2015 -0700

    implemented enabling sized-delete support at runtime

    Under gcc 4.5 or greater we're using ifunc function attribute
    to resolve
    sized delete operator to either plain delete implementation
    (default) or
    to sized delete (if enabled via environment variable
    TCMALLOC_ENABLE_SIZED_DELETE).

M	configure.ac
M	src/libc_override_gcc_and_weak.h
M	src/tests/tcmalloc_unittest.sh

commit c2a79d063c949584170b3e7dd2939a4548c16079
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Fri Oct 23 21:44:04 2015 -0700

    use x86 pause in spin loop

    This saves power and improves performance, particulary on SMT.

M	src/base/spinlock.cc

commit 0fb6dd8aa3c2fe3245c31c138ec4dfb05efd7f6d
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Fri Oct 23 22:09:25 2015 -0700

    added binary_trees benchmark

M	.gitignore
M	Makefile.am
A	benchmark/binary_trees.cc

commit a8852489e54e915d22abbdad1688d1f25ccb7925
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Oct 18 00:40:15 2015 -0700

    drop unsupported allocation sampling code in tcmalloc_minimal

M	src/tcmalloc.cc
M	src/thread_cache.h

commit a9db0ae516c225543976280047b22b1e0ca08b93
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Oct 4 21:12:28 2015 -0700

    implemented (disabled by default) sized delete support

    gcc 5 and clang++-3.7 support sized deallocation from C++14. We are
    taking advantage of that by defining sized versions of operator
    delete.

    This is off by default so that if some existing programs that
    define own
    global operator delete without sized variant are not broken by
    tcmalloc's sized delete operator.

    There is also risk of breaking exiting code that deletes objects using
    wrong class (i.e. base class) without having virtual destructors.

M	configure.ac
M	src/gperftools/tcmalloc.h.in
M	src/libc_override_gcc_and_weak.h
M	src/libc_override_redefine.h
M	src/tcmalloc.cc
M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in

commit 88686972b9caf8fd132c4e30d89da78c3d324c27
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Oct 4 11:15:37 2015 -0700

    pass -fsized-deallocation to gcc 5

    Otherwise it gives warning for declaration of sized delete operator.

M	Makefile.am
M	configure.ac

commit 0a18fab3af2f1b59b851836d319a1eff0db5d44e
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Oct 4 21:07:54 2015 -0700

    implemented sized free support via tc_free_sized

M	src/debugallocation.cc
M	src/gperftools/tcmalloc.h.in
M	src/tcmalloc.cc
M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in
M	src/windows/patch_functions.cc

commit 464688ab6ddb82db22ea9b934ddea192478e4535
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sun Oct 4 21:27:56 2015 -0700

    speedup free code path by dropping "fast path allowed check"

M	src/tcmalloc.cc

commit 10f7e207166bd6652ed8803b9885917bfbbd90d0
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Oct 3 18:47:14 2015 -0700

    added SizeMap::MaybeSizeClass

    Because it allows us to first check for smaller sizes, which is most
    likely.

M	src/common.h

commit 436e1dea43dc097525e43a43e6d79810ba6921b5
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Oct 3 15:40:21 2015 -0700

    slightly faster GetCacheIfPresent

M	src/thread_cache.h

commit 04df911915ecfcbc5e6b13fdab1b86f825ed1938
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Oct 3 15:38:33 2015 -0700

    tell compiler that non-empty hooks are unlikely

M	src/malloc_hook-inl.h

commit 8cc75acd1f4024ca978858b1cf85b45204ed32b2
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Oct 4 11:04:12 2015 -0700

    correctly test for -Wno-unused-result support

    gcc is only giving warning for unknown -Wno-XXX flags so test never
    fails on gcc even if -Wno-XXX is not supported. By using
    -Wunused-result we're able to test if gcc actually supports it.

    This fixes issue #703.

M	configure.ac

commit 7753d8239b1e427d83729b6d5c0401e1d80308fd
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Oct 4 18:26:59 2015 -0700

    fixed clang warning about shifting negative values

M	src/base/basictypes.h

commit ae09ebb3833f3f207b7623245e360ddf122b823e
Author: Jens Rosenboom <j.rosenboom@x-ion.de>
Date:	Thu Nov 19 17:45:44 2015 +0100

    Fix tmpdir usage in heap-profiler_unittest.sh

    Using a single fixed directory would break when tests were being
    run in
    parallel with "make -jN".

    Also, the cleanup at the end of the test didn't work because it
    referred
    to the wrong variable.

M	src/tests/heap-profiler_unittest.sh

commit df34e71b575daa6e4fa7588ae0deb9d529566f08
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Nov 21 16:03:09 2015 -0800

    use $0 when referring to pprof

    This fixed debian bug #805536. Debian ships pprof under google-pprof
    name so it is handy when google-pprof --help refers to itself
    correctly.

M	src/pprof

commit 7773ea64ee254700ef0ffc5673539f0e111a4f86
Author: Adhemerval Zanella <adhemerval.zanella@linaro.com>
Date:	Fri Nov 6 16:29:12 2015 -0200

    Alignment fix to static variables for system allocators

    This patch the placement new for some system allocator to force the
    static buffer to pointer value.

M	src/memfs_malloc.cc
M	src/system-alloc.cc

commit c46eb1f3d2f7a2bdc54a52ff7cf5e7392f5aa668
Author: Boris Sazonov <bsazonov@gmail.com>
Date:	Thu Oct 15 17:39:08 2015 +0300

    Fixed printf misuse in pprof - printed string was passed as
    format. Better use print instead

M	src/pprof

commit 9bbed8b1a8f1229cf0f1b4185683f309267ee1b9
Author: Boris Sazonov <bsazonov@gmail.com>
Date:	Wed Sep 23 19:46:13 2015 +0300

    Fixed assembler argument passing inside _syscall6 on MIPS - it was
    causing 'Expression too complex' compilation errors in spinlock

M	src/base/linux_syscall_support.h

commit 962aa53c55968f62f548f6f6f4849a384b505ca0
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Oct 10 20:31:50 2015 -0700

    added more fastpath microbenchmarks

    This also makes them output nicer results. I.e. every benchmark is
    run 3
    times and iteration duration is printed for every run.

    While this is still very synthetic and unrepresentave of malloc
    performance
    as a whole, it is exercising more situations in tcmalloc fastpath. So
    it a
    step forward.

M	Makefile.am
M	benchmark/malloc_bench.cc
A	benchmark/run_benchmark.c
A	benchmark/run_benchmark.h

commit 347a830689e4dba2adc1368d00fe4723ba726b4a
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Oct 10 15:58:11 2015 -0700

    Ensure that PPROF_PATH is set for debugallocation_test

    Which fixes issue #728.

M	src/tests/debugallocation_test.sh

commit a9059b7c30308a4f4ab25f00e55b67c649614ed3
Author: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Date:	Sat Oct 10 15:35:54 2015 -0700

    prevent clang from inlining Mallocer in heap checker unittest

    Looks like existing "trick" to avoid inlining doesn't really prevent
    sufficiently smart compiler from inlining Mallocer function. Which
    breaks tests, since test relies Mallocer having it's own separate
    stack
    frame.

    Making mallocer_addr variable volatile is seemingly enough to
    stop that.

M	src/tests/heap-checker_unittest.cc

commit 6627f9217d8897b297c6da038cfbcff6a3086cfa
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 26 19:52:37 2015 -0700

    drop cycleclock

M	Makefile.am
D	src/base/cycleclock.h
M	src/base/sysinfo.cc
M	vsprojects/addressmap_unittest/addressmap_unittest.vcproj
M
vsprojects/low_level_alloc_unittest/low_level_alloc_unittest.vcproj
M	vsprojects/packed-cache_test/packed-cache_test.vcproj

commit f985abc29607b8a5662ddac7bd1ed99c71ceeb11
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 26 19:50:03 2015 -0700

    amputate unportable and unused stuff from sysinfo

    We still check number of cpus in the system (in spinlock code),
    but old
    code was built under assumption of "no calls malloc" which is
    not needed
    in tcmalloc. Which caused it to be far more complicated than
    necessary (parsing procfs files, ifdefs for different OSes and
    arch-es).

    Also we don't need clock cycle frequency measurement.

    So I've removed all complexity of ald code and NumCPUs function and
    replaced it with GetSystemCPUsCount which is straightforward and
    portable call to sysconf.

    Renaming of cpus count function was made so that any further code that
    we might port from Google that depends on old semantics of NumCPUs
    will
    be detected at compile time. And has to be inspected for whether it
    really needs that semantics.

M	src/base/spinlock.cc
M	src/base/sysinfo.cc
M	src/base/sysinfo.h

commit 16408eb4d71ecbb1dd3b3c7ff22c94bd254d7b58
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Tue Sep 29 11:59:25 2015 -0700

    amputated wait_cycles accounting in spinlocks

    This is not needed and pulls in CycleClock dependency that lowers
    code portability.

M	src/base/spinlock.cc
M	src/base/spinlock.h

commit fedceef40cd217ef406bc2522e9a8f879d60b0c0
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Tue Sep 29 11:55:35 2015 -0700

    drop cycleclock reference in ThreadCache

M	src/thread_cache.cc

commit d7fdc3fc9ddc0937eb7961b1d8c864cc8182f0d9
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Tue Sep 29 11:43:09 2015 -0700

    dropped unused and unsupported synchronization profiling facility

    Spinlock usage of cycle counter is due do tracking of time it's spent
    waiting for lock. But this tracking is only useful we actually have
    synchronization profiling working, which dont have. Thus I'm dropping
    calls to this facility with eye towards further removal of cycle clock
    usage.

M	Makefile.am
M	src/base/spinlock.cc
D	src/base/synchronization_profiling.h

commit 3a054d37c1f5323462bd77f55be02c5b0d764611
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Mon Sep 28 15:40:15 2015 -0700

    dropped unused SpinLockWait function

M	src/base/spinlock.cc
M	src/base/spinlock_internal.cc
M	src/base/spinlock_internal.h

commit 5b62d38329f04ee30fb475a36b552c1ebc4e1e79
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Mon Sep 28 10:27:49 2015 -0700

    avoid checking for dup. entries on empty backtrace

    This might fix issue #721. But it is right thing to do
    regardless. Since
    if depth is 0 we'll be reading random "garbage" on the stack.

M	src/profiler.cc

commit 7b9ded722e4cef9a44b8d8bfa80d3e1e108cf590
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 12 16:26:54 2015 -0700

    fixed compiler warning in memory_region_map.cc

M	src/memory_region_map.cc

commit 4194e485cbb5d8c59f65aba49da63c08ecc573da
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 12 16:20:53 2015 -0700

    Don't link libtcmalloc_minimal.so to libpthread.so

    So that LD_PRELOAD-ing doesn't force loading libpthread.so which may
    slow down some single-threaded apps.

    tcmalloc already has maybe_threads facility that can detect if
    libpthread.so is loaded (via weak symbols) and provide 'simulations'
    of
    some pthread functions that tcmalloc needs.

M	Makefile.am
M	src/maybe_threads.cc
M	src/maybe_threads.h
M	src/static_vars.cc

commit 121038308d8c5b34707614c44de265816a322563
Author: Fredrik Mellbin <fredrik.mellbin@gmail.com>
Date:	Sun Sep 27 01:18:31 2015 +0200

    Check if _MSC_VER is defined to avoid warnings

M	src/windows/port.h

commit 73673229955cf35c5b3046ee3100d94e82d33bc2
Author: Fredrik Mellbin <fredrik.mellbin@gmail.com>
Date:	Sun Sep 27 01:11:14 2015 +0200

    Make default config.h work with VS2015

M	src/windows/config.h

commit ae0a444db06b2327441e6160eafa33d8b7b95629
Author: Dair Grant <dair@feralinteractive.com>
Date:	Thu Oct 1 13:46:22 2015 +0100

    Ensure ThreadCache objects are CACHELINE_ALIGNED.

M	src/base/basictypes.h
M	src/common.cc
M	src/system-alloc.cc

commit ea0b1d315497771d9d077c754fb9d6a92d1c01dc
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 26 11:13:13 2015 -0700

    unbreak TestErrno again

    Somehow in previous commit I managed to break assignment of memalign
    result to variable being tested. Luckily gcc gave me warning.

M	src/tests/tcmalloc_unittest.cc

commit e53aef24add50bdee5ab2943d96e5c5b2b3bf596
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 26 09:58:45 2015 -0700

    don't try to test memalign on windows

    This unbreaks tcmalloc_unittest.cc on windows.

M	src/tests/tcmalloc_unittest.cc

commit 7707582448d5bdf311d88726c5f77fcbb0bedd09
Merge: 5078abd 9eb63bd
Author: Aliaksey Kandratsenka (aka Aliaksei Kandratsenka)
<alkondratenko@gmail.com>
Date:	Sat Sep 26 09:43:50 2015 -0700

    Merge pull request #717 from myrsloik/master

    Use correct mangled new and delete symbols on windows x64

commit 9eb63bddfb7a8a7b086bb3daceeeaa2e3b1d8f67
Author: Fredrik Mellbin <fredrik.mellbin@gmail.com>
Date:	Thu Sep 24 19:57:26 2015 +0200

    Use correct mangled new and delete symbols on windows x64

M	src/windows/patch_functions.cc

commit 5078abdb331e63d7a216994f186eb736861f8df7
Author: fdeweerdt <fdeweerdt@cloudmark.com>
Date:	Tue Aug 18 09:27:39 2015 -0700

    Don't discard curl options if timeout is not defined.

    Editing the options passed to curl via 'my @URL_FETCHER = ("curl",
    "-s");' (in particular to add a -k to ignore self signed certs) fails
    for some invocations of curl. In FetchDynamicProfile, 'my @fetcher =
    AddFetchTimeout($fetch_timeout, @URL_FETCHER);' ends up being just
    'curl' if timeout is not defined.

    This happens because AddFetchTimeout doesn't retrieve all the
    arguments
    from the caller.

    [alk@tut.by: updated commit message]
    Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>

M	src/pprof

commit 54505f1d50c2d1f4676f5e87090b64a117fd980e
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 2 19:28:03 2015 -0700

    help clang with inlining important fast-path functions

    Clang's recent focus on code size doesn't help us in malloc fast-path
    because somehow clang completely ignores inline directives.

    In order to help clang generate code that was actually intended by
    original authors, we're adding always_inline attribute to key
    fast-path functions.

    Clang also guessed likely branch "wrong" in couple places. Which is
    now addressed by UNLIKELY declarations there.

M	src/tcmalloc.cc
M	src/thread_cache.h

commit 73c0c8c61b84e268bafd961bf304b2e4d296142f
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 2 19:09:02 2015 -0700

    moved do_mallor_or_cpp_alloc in better place

M	src/tcmalloc.cc

commit 41aca070e85258d9d47b0ac47f5eddece8bf45ba
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 2 10:53:32 2015 -0700

    always set errno to ENOMEM on OOM condition and in single place

    While standards do not require us to set errno to ENOMEM in certain
    places (like posix_memalign), existing code may sometimes set it
    (i.e. because mmap or sbrk couldn't get memory from kernel)
    anyways. And from my reading of glibc, it's malloc is doing more or
    less same by just always setting ENOMEM on OOM condition.

    This commit also eliminates some functions (XXX_no_errno) that are not
    needed anymore.

M	src/debugallocation.cc
M	src/page_heap.cc
M	src/tcmalloc.cc

commit c4493874cd3b662d2778f3b79a3096ae61569b67
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Aug 1 22:20:15 2015 -0700

    deal with OOM handling in one place and prior to returning result

    This commit removes 4 (four!) duplicates of C++ OOM handling. And
    introduces one helper for that.

    Other change is that malloc doesn't have to check tc_new_mode anymore
    until it _actually_ deals with OOM condition. Which shaves off couple
    instructions from fast-path.

M	src/debugallocation.cc
M	src/tcmalloc.cc

commit 09448a8fe977eaa083340c2504caac8820832179
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 2 18:11:04 2015 -0700

    added tcmalloc_unittest path with TCMALLOC_HEAP_LIMIT_MB=512

    I.e. so that we can exercise "voluntary" OOM conditions better.

M	src/tests/tcmalloc_unittest.sh

commit 73fb7c7eb37e488bab8298be4110e30d83af2184
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 2 01:47:55 2015 -0700

    added test on errno = ENOMEM on out of memory

M	src/tests/tcmalloc_unittest.cc

commit eb725ff26371dfb5ae2523802c6abe75833cacef
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Aug 1 20:54:39 2015 -0700

    unbreak heap-profiler-unittest on gcc 5

    gcc 5 has got nice new optimization (-fipa-icf) which merges identical
    functions into one. And that causes heap-profiler_unittest to fail
    since it expects to see both Allocate and Allocate2 in heap
    profiles. And smart GCC detects that they are same function and makes
    one function out of two and thus breaks this test.

    New code simply adds (disabled) logging calls to make those functions
    non-identical.

M	src/tests/heap-profiler_unittest.cc

commit 53833298f3822b2b8b78c9dc85160d65d78a6857
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Aug 1 19:46:34 2015 -0700

    unbreak heap_checker_unittest on gcc 5

    GCC 5 ended up too smart and optimized out assignment of allocated
    block to global variable. Which caused test to fail since it triggered
    unexpected "leak".

M	src/tests/heap-checker_unittest.cc

commit 024bae96ce8e1591993fc0da191ce0a92d609481
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Aug 1 17:41:42 2015 -0700

    dropped support for PREANSINEW define which nobody needs anymore

M	src/debugallocation.cc
M	src/tcmalloc.cc

commit 64e0133901a20f83c41adb36748fd19d21228515
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun May 3 12:55:47 2015 -0700

    added trivial malloc fast-path benchmark

    While this is not good representation of real-world production malloc
    behavior, it is representative of length (instruction-wise and well as
    cycle-wise) of fast-path. So this is better than nothing.

M	.gitignore
M	Makefile.am
A	benchmark/malloc_bench.cc

commit e1d1311cfb6312cd44e086c879f3e95cbfa0eb9d
Author: Tom Conerly <tomconerly@gmail.com>
Date:	Mon Jul 27 11:35:29 2015 -0700

    issue-699: Free list on error paths

M	src/heap-profile-table.cc

commit b5b79860fd2b8e1a9b0573e93f942695f2992b59
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Aug 1 11:24:56 2015 -0700

    issue-702: correctly declare arg-less functions in profiler.h

    This is patch by user mitchblank.

    From his words:

    The problem is pretty simple.  Ancient C code allowed declarations
    without argument prototypes, i.e.

      int foo();

    For compatibility this is still accepted.  If you want to declare a
    function with zero prototypes the correct way to do it is:

       int foo(void);

    C++ also accepts this syntax, but it's not needed there.

    Normally compilers still accept the old-style entries, but with
    sufficient warning flags gcc will complain about them.  It is good for
    header files to have the explicit "void" argument so all compilers are
    kept happy.

    I'm attaching a simple patch to add the "void" parameter to that file.
    I haven't checked if other headers have the same problem (I'm just
    using the profiler at the moment)

    <end of quote>

    In fact "int foo()" means "foo accepts any args" and we really want
    "foo has no args". For which int foo (void) is right declaration.

M	src/gperftools/profiler.h

commit 7df7f14c949d89d9c3f5c7c339bbdda81fb8abc7
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jun 13 21:35:06 2015 -0700

    issue-693: enable futex usage on arm

    This patch was contributed by user spotrh.

M	src/base/linux_syscall_support.h
M	src/base/spinlock_linux-inl.h

commit cb998e56d763cfe901cf30a692d4cfd4f85259ae
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jun 13 21:28:28 2015 -0700

    issue-693: convert sys_futex to it's 6-arg form

    Because sys_futex actually takes 6 args in more recent kernels (even
    though last two args are unused for FUTEX_{WAKE,WAIT}.

    This is patch contributed by user spotrh.

M	src/base/linux_syscall_support.h

commit 36066b8df4bc516ade5209a1f60bd84d6448b531
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jun 27 21:15:30 2015 -0700

    issue-695: implementated TCMALLOC_TRACE_FILE variable

    This is contributed by Paolo Bonzini.

    This commit adds TCMALLOC_TRACE_FILE environment variable, which if
    defined overrides location of malloc trace file.

M	src/debugallocation.cc

commit c4069d2d37b67296d675c2d1de42a46dc6d43efc
Author: Brian Silverman <bsilver16384@gmail.com>
Date:	Tue Jun 16 16:56:48 2015 -0700

    Add empty virtual destructor to class with virtual methods.

    Clang 3.5 has a warning about deleting objects with virtual methods
    through non-virtual destructors which was triggered. I'm not sure
    whether this actually creates any undefined or otherwise incorrect
    behavior, but it seems like a good thing to fix regardless.

    Example compiler warning:
    third_party/gperftools/src/tests/profile-handler_unittest.cc:282:5:
    error:
      delete called on '(anonymous namespace)::BusyThread' that has
      virtual
      functions but non-virtual destructor [-Wdelete-non-virtual-dtor]
	delete busy_worker_;
	^

M	src/tests/profile-handler_unittest.cc

commit 019362fefcdca39a46d1a831ed46266c24b9a273
Author: Patrick LoPresti <lopresti@gmail.com>
Date:	Mon May 25 11:56:51 2015 -0700

    Add support for CPUPROFILE_TIMER_SIGNAL environment variable.

    Which both enables per-thread timers and allows the signal number for
    the timer to be selected.

    [alk@tut.by: reformatted commit message for subject line length]
    Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>

M	src/profile-handler.cc
M	src/tests/profile-handler_unittest.cc

commit 81d8d2a9e7f941a2051781fd0fe62c683c32f1ef
Author: Milton Chiang <milton.chiang@mediatek.com>
Date:	Wed May 13 21:53:05 2015 +0800

    Add "ARMv8-A" to the supporting list of ARM architecture.

M	src/base/arm_instruction_set_select.h

commit 64d1a86cb8da245c982d470a7dfdd635197e6e5e
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat May 9 15:38:12 2015 -0700

    include time.h for struct timespec on Visual Studio 2015

    This patch was submitted by user wmamrak.

M	src/windows/port.h

commit 7013b219970a329d1db58fbd7fa7c907bec8dbba
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat May 9 12:48:11 2015 -0700

    hook mi_force_{un,}lock on OSX instead of pthread_atfork

    This is patch by Anton Samokhvalov.

    Apparently it helps with locking around forking on OSX.

M	src/libc_override_osx.h
M	src/static_vars.cc

commit f25f8e0bf2d361f852929848d79d7ba54586c352
Author: Angus Gratton <gus@projectgus.com>
Date:	Mon May 4 08:18:43 2015 +1000

    Clarify that only tcmalloc_minimal is supported on Windows.

M	INSTALL
M	README_windows.txt

commit 772a686c45455893708178d3b59b1d3b571015aa
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun May 3 13:15:16 2015 -0700

    issue-683: fix compile error in clang with -m32 and 64-bit off_t

M	src/malloc_hook_mmap_linux.h

commit 0a3bafd645764250732f3c0627534142568f6f1f
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Apr 11 10:35:53 2015 -0700

    fix typo in PrintAvailability code

    This is patch contributed by user ssubotin.

M	src/windows/nm-pdb.c

commit 6ce10a2a05f13803061538d5c77e89695de59be4
Author: Matt Cross <mat.cross@gmail.com>
Date:	Thu Mar 26 16:13:56 2015 -0400

    Add support for printing collapsed stacks for generating flame graphs.

M	src/pprof

commit 2c1a165fa56a6f8dff8fa2662ceda971ad676ead
Author: Matt Cross <matt.cross@gmail.com>
Date:	Thu Mar 26 12:10:23 2015 -0400

    Add support for reading debug symbols automatically on systems
    where shared libraries with debug symbols are installed at
    "/usr/lib/debug/<originalpath>.debug", such as RHEL and CentOS.

M	src/pprof

commit 2e654956287043a30aeaec20e5c19650358af618
Author: Jonathan Lambrechts <jonathan@aljl.eu>
Date:	Fri Feb 13 18:52:21 2015 +0100

    callgrind : handle inlined functions

M	src/pprof

commit 90d7408d381cf2ad68ce4974cbccd51ed5222ca3
Author: Jonathan Lambrechts <jonathan@aljl.eu>
Date:	Fri Feb 13 18:51:33 2015 +0100

    pprof : callgrind : fix unknown files

M	src/pprof

commit aa963a24ae7a74b095a631ea6a86cd071c453911
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Mon Feb 9 08:35:03 2015 -0800

    issue-672: fixed date of news entry of gperftools 2.4 release

    It is 2015 and not 2014. Spotted and reported by Armin Rigo.

M	NEWS

commit c66aeabdbacbfd3aff7a6633f34526ca32642f67
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jan 10 14:35:54 2015 -0800

    fixed default value of HEAP_PROFILER_TIME_INTERVAL in .html doc

M	doc/heapprofile.html

commit 689e4a5bb4b2a8afecb85e83b8e4f294f80b6124
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jan 10 12:26:51 2015 -0800

    bumped version to 2.4

M	NEWS
M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 3f5f1bba0c2cb4862c38b0c9050f1cede8a5c344
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Dec 28 18:18:27 2014 -0800

    bumped version to 2.4rc

M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit c4dfdebc796c2e802db686a7eea483f3d31edbcf
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Dec 28 17:53:02 2014 -0800

    updated NEWS for gperftools 2.4rc

M	NEWS

commit 0096be5f6f0bb2a01438ee78b7bb6158ffa5a1fb
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Dec 20 17:17:41 2014 -0800

    pprof: allow disabling auto-removal of "constant 2nd frame"

    "constand 2nd frame" feature is supposed to detect and workaround
    incorrect cpu profile stack captures where parts of or whole cpu
    profiling signal handler frames are not skipped.

    I've seen programs where this feature incorrectly removes non-signal
    frames.

    Plus it actually hides bugs in stacktrace capturing which we want be
    able to spot.

    There is now --no-auto-signal-frm option for disabling it.

M	src/pprof

commit 4859d8020579cd8db8b1f8bc6af382104b38f96f
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Dec 20 19:56:13 2014 -0800

    cpuprofiler: drop correct number of signal handler frames

    We actually have 3 and not 2 of them.

M	src/profiler.cc

commit 812ab1ee7e4365e6a9568834c7e8f4aef10018fb
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Dec 20 19:53:12 2014 -0800

    pprof: eliminate duplicate top frames if dropping signal frames

    In cpu profiles that had parts of signal handler we could have
    situation like that:

    * PC
    * signal handler frame
    * PC

    Specifically when capturing stacktraces via libunwind.

    For such stacktraces pprof used to draw self-cycle in functions
    confusing everybody. Given that me might have a number of such
    profiles in the wild it makes sense to treat that duplicate PC issue.

M	src/pprof

commit e6e78315e4761ad121a5eeb4fdffe3571d81ac17
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Dec 20 19:04:43 2014 -0800

    cpuprofiler: better explain deduplication of top stacktrace entry

M	src/profiler.cc

commit 24b8ec28464712bc124af5655ebf877fb3f79032
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Dec 20 17:10:38 2014 -0800

    cpuprofiler: disable capturing stacktrace from signal's ucontext

    This was reported to cause problems due to libunwind occasionally
    returning top level pc that is 1 smaller than real pc which causes
    problems.

M	src/stacktrace_libunwind-inl.h

commit 83588de7204124c8d60703f169c2f3af8aa0ce5f
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Dec 20 17:04:10 2014 -0800

    pprof: added support for dumping stacks in --text mode

    Which is very useful for diagnosing stack capturing and processing
    bugs.

M	src/pprof

commit 2f29c9b06220ce6ad75d5ab2b98e9f63ade79eea
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Dec 20 17:03:36 2014 -0800

    pprof: made --show-addresses work

M	src/pprof

commit b8b027d09a53dd6292d2f7c45aec40198628a808
Author: Raphael Moreira Zinsly <rzinsly@linux.vnet.ibm.com>
Date:	Tue Dec 23 10:55:22 2014 -0200

    Make PPC64 use 64K of internal page size for tcmalloc by default

    This patch set the default tcmalloc internal page size to 64K when
    built on PPC.

M	configure.ac

commit 3f55d874be8812aef9f0f567048188584962b4c1
Author: Raphael Moreira Zinsly <rzinsly@linux.vnet.ibm.com>
Date:	Tue Dec 23 10:29:49 2014 -0200

    New configure flags to set the alignment and page size of tcmalloc

    Added two new configure flags, --with-tcmalloc-pagesize and
    --with-tcmalloc-alignment, in order to set the tcmalloc internal page
    size and tcmalloc allocation alignment without the need of a compiler
    directive and to make the choice of the page size independent of the
    allocation alignment.

M	INSTALL
M	configure.ac
M	src/common.h

commit 1035d5c18f64d114ac790b92a96f3b3a1a301eb9
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Dec 21 19:52:34 2014 -0800

    start building malloc_extension_c_test even with static linking

    Comment in Makefile.am stating that it doesn't work with static
    linking is not accurate anymore.

M	Makefile.am

commit d570a6391cf4c5a5570e22ada5cf0b324c7b8dfd
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Dec 21 19:33:25 2014 -0800

    unbreak malloc_extension_c_test on clang

    Looks like even force_malloc trick was not enough to force clang to
    actually call malloc. I'm now calling tc_malloc directly to prevent
    that smartness.

M	src/tests/malloc_extension_c_test.c

commit 4ace8dbbe2e04da1029a539c72b90dee1724c33f
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Dec 21 18:49:47 2014 -0800

    added subdir-objects automake options

    This is suggested by automake itself regarding future-compat.

M	.gitignore
M	Makefile.am

commit f72e37c3f99d942dd648e392abc65f294aa94fa8
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Dec 21 18:27:03 2014 -0800

    fixed C++ comment warning in malloc_extension_c.h from C compiler

M	src/gperftools/malloc_extension_c.h

commit f94ff0cc0943c7b7bb9390f9d83a57c9d9e11fd0
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 9 14:41:36 2014 -0800

    made AtomicOps_x86CPUFeatureStruct hidden

    So that access to has_sse2 is faster under -fPIC.

M	src/base/atomicops-internals-x86.h

commit 987a724c23df4b29eb457e96bb5c1bbab15dc90e
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 9 14:20:20 2014 -0800

    dropped atopmicops workaround for irrelevant Opteron locking bug

    It's not cheap at all when done in this way (i.e. without runtime
    patching) and apparently useless.

    It looks like Linux kernel never got this workaround at all. See
    bugzilla ticket: https://bugzilla.kernel.org/show_bug.cgi?id=11305

    And I see no traces of this workaround in glibc either.

    On the other hand, opensolaris folks apparently still have it (or
    something similar, based on comments on linux bugzilla) in their code:
    https://github.com/illumos/illumos-gate/blob/32842aabdc7c6f8f0c6140a256cf42cf5404fefb/usr/src/uts/i86pc/os/mp_startup.c#L1136

    And affected CPUs (if any) are from year 2008 (that's 6 years now).

    Plus even if somebody still uses those cpus (which is unlikely), they
    won't have working kernel and glibc anyways.

M	src/base/atomicops-internals-x86.cc
M	src/base/atomicops-internals-x86.h

commit 7da5bd014d77ddaf694054b1e3ae0a3ef92ab384
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Dec 20 21:18:07 2014 -0800

    enabled aggressive decommit by default

    TCMALLOC_AGGRESSIVE_DECOMMIT=f is one way to disable it and
    SetNumericProperty is another.

M	src/static_vars.cc
M	src/tests/tcmalloc_unittest.sh

commit 51b0ad55b3267caff6cd2d25815bfb913179b526
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 9 17:36:49 2014 -0800

    added basic unit test for singular malloc hooks

M	src/tests/malloc_extension_c_test.c

commit bce72dda078d2cb3e9745077f9903e642a966131
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 9 17:12:05 2014 -0800

    inform compiler that tcmalloc allocation sampling is unlikely

    Now compiler generates slightly better code which produces jump-less
    code for common case of not sampling allocations.

M	src/tcmalloc.cc

commit 4f051fddcd7af53e1607b6a4866ffa461a0033ef
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Mar 15 13:18:28 2014 -0700

    eliminated CheckIfKernelSupportsTLS

    We don't care about pre-2.6.0 kernels anymore. So we can assume that
    if compile time check worked, then at runtime it'll work.

M	src/tcmalloc.cc
M	src/thread_cache.cc
M	src/thread_cache.h
M	src/windows/port.cc

commit 81291ac3992ec7500faf2026c72feb80c9634dc3
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 9 16:48:45 2014 -0800

    set elf visibility to hidden for malloc hooks

    To speed up access to them under -fPIC.

M	src/malloc_hook-inl.h

commit 105c004d0c84137f32cc71b8d3f7899fcc8c2e72
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 9 14:40:30 2014 -0800

    introduced ATTRIBUTE_VISIBILITY_HIDDEN

    So that we can disable elf symbol interposition for certain
    perf-sensitive symbols.

M	src/base/basictypes.h

commit 6a6c49e1f53df3d00a0661a86090534146ce686c
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 9 16:23:06 2014 -0800

    replaced separate singular malloc hooks with faster HookList

    Specifically, we can now check in one place if hooks are set at all,
    instead of two places. Which makes fast path shorter.

M	src/malloc_hook-inl.h
M	src/malloc_hook.cc

commit ba0441785bae214566008e69adcd915800d9dbb3
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 9 16:13:54 2014 -0800

    removed extra barriers in malloc hooks mutation methods

    Because those are already done under spinlock and read-only and
    lockless Traverse is already tolerant to slight inconsistencies.

M	src/malloc_hook.cc

commit 890f34c77ef79dfe1e00ce36a3f91aee7fe759b7
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 9 16:08:59 2014 -0800

    introduced support for deprecated singular hooks into HookList

    So that we can later drop separate singular hooks.

M	src/malloc_hook-inl.h
M	src/malloc_hook.cc

commit 81ed7dff11de915b12c4111d403e52c81c786f82
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Dec 7 13:33:40 2014 -0800

    returned date of 2.3rc in NEWS back

M	NEWS

commit 463a619408219fff8955d47a71de1aab31ebd129
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Dec 7 12:53:35 2014 -0800

    bumped version to 2.3

M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 76e8138e12567e2ee1f638e8fcffadc2ca1de83d
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Dec 7 12:46:49 2014 -0800

    updated NEWS for gperftools 2.3

M	NEWS

commit 8eb4ed785ae883acb6425fd980e9d3e6bdcab89d
Author: Raphael Moreira Zinsly <rzinsly@linux.vnet.ibm.com>
Date:	Thu Nov 27 14:11:09 2014 -0200

    Added option to disable libunwind linking

    This patch adds a configure option to enable or disable libunwind
    linking.
    The patch also disables libunwind on ppc by default.

M	configure.ac

commit 3b94031d21fac39ce5be820f4f8bc37626ed4c08
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Thu Nov 27 11:48:08 2014 -0800

    compile libunwind unwinder only of __thread is supported

    This fixed build on certain OSX that I have access to.

M	src/stacktrace.cc

commit 3ace468202a8647a16134d0bb42fa497fa3ec0d4
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Thu Nov 27 10:43:11 2014 -0800

    issue-658: correctly close socketpair fds when socketpair fails

    This applies patch by glider.

M	src/symbolize.cc

commit e7d5e512b068fb76f5eeed7985bebd9c0d14e226
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 2 20:02:12 2014 -0800

    bumped version to 2.3rc

M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 1d44d378513a8782c058833118b664f38214810b
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 2 19:38:29 2014 -0800

    updated NEWS for gperftools 2.3rc

M	NEWS

commit 1108d83cf4a1692fce3b736e16d3e98c33329177
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Sep 7 13:09:14 2014 -0700

    implemented cpu-profiling mode that profiles threads separately

    Default mode of operation of cpu profiler uses itimer and
    SIGPROF. This timer is by definition per-process and no spec defines
    which thread is going to receive SIGPROF. And it provides correct
    profiles only if we assume that probability of picking threads will be
    proportional to cpu time spent by threads.

    It is easy to see, that recent Linux (at least on common SMP hardware)
    doesn't satisfy that assumption. Quite big skews of SIGPROF ticks
    between threads is visible. I.e. I could see as big as 70%/20%
    division instead of 50%/50% for pair of cpu-hog threads. (And I do see
    it become 50/50 with new mode)

    Fortunately POSIX provides mechanism to track per-thread cpu time via
    posix timers facility. And even more fortunately, Linux also provides
    mechanism to deliver timer ticks to specific threads.

    Interestingly, it looks like FreeBSD also has very similar facility
    and seems to suffer from same skew.  But due to difference in a way
    how threads are identified, I haven't bothered to try to support this
    mode on FreeBSD.

    This commit implements new profiling mode where every thread creates
    posix timer which tracks thread's cpu time. Threads also also set up
    signal delivery to itself on overflows of that timer.

    This new mode requires every thread to be registered in cpu
    profiler. Existing ProfilerRegisterThread function is used for that.

    Because registering threads requires application support (or suitable
    LD_PRELOAD-able wrapper for thread creation API), new mode is off by
    default. And it has to be manually activated by setting environment
    variable CPUPROFILE_PER_THREAD_TIMERS.

    New mode also requires librt symbols to be available. Which we do not
    link to due to librt's dependency on libpthread.  Which we avoid due
    to perf impact of bringing in libpthread to otherwise single-threaded
    programs. So it has to be either already loaded by profiling program
    or LD_PRELOAD-ed.

M	Makefile.am
M	configure.ac
M	src/maybe_threads.cc
M	src/maybe_threads.h
M	src/profile-handler.cc
M	src/tests/profile-handler_unittest.cc

commit 714bd93e42535e759716324a90fbb395506499d2
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 10 20:28:11 2014 -0700

    drop workaround for too old redhat 7

    Note that this is _not_ RHEL7 but original redhat 7 from early 2000s.

M	configure.ac

commit 8de46e66fcd2577758ab297b553bb0f468d8a97a
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 10 19:38:07 2014 -0700

    don't add leaf function twice to profile under libunwind

M	src/profiler.cc

commit 2e5ee0488996437aeef2028ad95d969b56abcad1
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 10 12:19:45 2014 -0700

    pprof: indicate if using remote profile

    Missing profile file is common source of confusion. So a bit more
    clarify is useful.

M	src/pprof

commit 6efe96b41c9531f68f806faa0464445f884178ce
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Oct 11 15:09:18 2014 -0700

    issue-493: correctly detect __ARM_ARCH_6ZK__ for MemoryBarrier

    Which should fix issue reported by user pedronavf

M	src/base/atomicops-internals-arm-v6plus.h

commit 8e97626378d5c4151a480dea1964e25969c9311d
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Nov 2 11:28:30 2014 -0800

    issue-655: use safe getenv for aggressive decommit mode flag

    Because otherwise we risk deadlock due to too early use of getenv on
    windows.

M	src/base/commandlineflags.h
M	src/static_vars.cc

commit 8c3dc52fcfe02412a529769a22cbc75388a5d368
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Oct 18 16:35:57 2014 -0700

    issue-654: [pprof] handle split text segments

    This applies patch by user simonb.

    Quoting:

    Relocation packing splits a single executable load segment into two.
    Before:

      LOAD	     0x000000 0x00000000 0x00000000 0x2034d28 0x2034d28
      R E 0x1000
      LOAD	     0x2035888 0x02036888 0x02036888 0x182d38 0x1a67d0
      RW  0x1000

    After:
      LOAD	     0x000000 0x00000000 0x00000000 0x14648 0x14648 R
      E 0x1000
      LOAD	     0x014648 0x0020c648 0x0020c648 0x1e286e0 0x1e286e0
      R E 0x1000
      ...
      LOAD	     0x1e3d888 0x02036888 0x02036888 0x182d38 0x1a67d0
      RW  0x1000

    The .text section is in the second LOAD, and this is not at
    offset/address zero.  The result is that this library shows up in
    /proc/self/maps as multiple executable entries, for example (note:
    this trace is not from the library dissected above, but rather from an
    earlier version of it):

      73b0c000-73b21000 r-xp 00000000 b3:19 786460
      /data/.../libchrome.2160.0.so
      73b21000-73d12000 ---p 00000000 00:00 0
      73d12000-75a90000 r-xp 00014000 b3:19 786460
      /data/.../libchrome.2160.0.so
      75a90000-75c0d000 rw-p 01d91000 b3:19 786460
      /data/.../libchrome.2160.0.so

    When parsing this, pprof needs to merge the two r-xp entries above
    into a single entry, otherwise the addresses it prints are incorrect.

    The following fix against 2.2.1 was sufficient to make pprof --text
    print the correct output.  Untested with other pprof options.

M	src/pprof

commit 44c61ce6c4c713b194330641f400bbf64fd2abec
Author: Ricardo M. Correia <rcorreia@wizy.org>
Date:	Wed Oct 8 04:39:14 2014 +0200

    Fix parsing /proc/pid/maps dump in CPU profile data file

    When trying to use pprof on my machine, the symbols of my program were
    not being recognized.

    It turned out that pprof, when calculating the offset of the text list
    of mapped objects (the last section of the CPU profile data file), was
    assuming that the slot size was always 4 bytes, even on 64-bit
    machines.

    This led to ParseLibraries() reading a lot of garbage data at the
    beginning of the map, and consequently the regex was failing to
    match on
    the first line of the real (non-garbage) map.

M	src/pprof

commit 2a28ef24ddf8013bff59914b10902f1fb07bf9b2
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 6 16:49:24 2014 -0700

    Added remaining memory allocated info to 'Exiting' dump message

    This applies patch by user yurivict.

M	src/heap-profiler.cc

commit bbf346a856d4a7c5c2ab0e65d7cccf3dc1f23f13
Author: Adam McNeeney <adam@meliorist.co.uk>
Date:	Fri Aug 22 10:01:24 2014 +0100

    Cope with new addr2line outputs for DWARF4

    Copes with ? for line number (converts to 0).
    Copes with (discriminator <num>) suffixes to file/linenum (removes).

    Change-Id: I96207165e4852c71d3512157864f12d101cdf44a

M	src/pprof

commit b08d760958dbacc8da822f7f3db76d58c95a114d
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Aug 23 14:45:08 2014 -0700

    issue-641: Added --show_addresses option

    This applies patch by user yurivict.

M	src/pprof

commit 3c326d9f200a527bba45f1d222aa6aff20d42bc3
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Tue Aug 19 08:14:08 2014 -0700

    issue-644: fix possible out-of-bounds access in GetenvBeforeMain

    As suggested by user Ivan L.

M	src/base/sysinfo.cc

commit f1ae3c446f34f6e8ac901caba281051ec269e4df
Author: jiakai <jia.kai66@gmail.com>
Date:	Mon Jul 28 11:28:03 2014 -0700

    Add an option to allow disabling stripping template argument in pprof

M	src/pprof

commit a12890df2519d254d1c497b8e0a65bb8fc9e1ab2
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jul 26 14:12:42 2014 -0700

    issue-635: allow whitespace in libraries paths

    This applies change suggested by user mich...@sebesbefut.com

M	src/pprof

commit d5e36788d8bc626403dc020a86213cfc740ee73d
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jul 26 13:59:22 2014 -0700

    issue-636: fix prof/web command on Windows/MinGW

    This applies patch sent by user chaishushan.

M	src/pprof

commit 4b788656bb9c480640d917d27d8a94a5eae436f5
Author: Michael Pasieka <michael.pasieka@highwinds.com>
Date:	Sun Jul 13 18:09:35 2014 -0700

    added option to display stack traces in output for heap checker

    Quoting from email:

    I had the same question as William posted to stack overflow back on
    Dec 9,2013: How to display symbols in stack trace of google-perftools
    heap profiler (*).	I dug into the source and realized the
    functionality was not there but could be added. I am hoping that
    someone else will find this useful/helpful.

    The patch I created will not attach so I am adding below.

    Enjoy!

    -- Michael

    *
    http://stackoverflow.com/questions/20476918/how-to-display-symbols-in-stack-trace-of-google-perftools-heap-profiler

M	src/pprof

commit 3abb5cb819bafe7004363f041c194afd827cb053
Author: WenSheng He <zhsBernie@gmail.com>
Date:	Mon Jun 30 14:39:13 2014 +0800

    issue-630: The env var should be "CPUPROFILE"

    To enable cpu profile, the env var should be "CPUPROFILE", not
    "PROFILE"
    actually.

    Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>

M	src/gperftools/profiler.h

commit fd81ec257883c6d5486e4568c955dff86dbed5c8
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jun 28 13:05:12 2014 -0700

    issue-631: fixed miscompilation of debugallocation without mmap

    This applies patch sent by user iamxujian.

    Clearly, when I updated debugallocation to fix issue-464 I've broken
    no-mmap path by forgetting closing brace.

M	src/debugallocation.cc

commit 2e90b6fd72fec33aedf547d1977bdee6b77645b9
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jun 21 15:45:44 2014 -0700

    bumped version to 2.2.1

M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 577b940cc0a0ef207115d071a81127f93f02c083
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jun 21 15:39:46 2014 -0700

    updated NEWS for 2.2.1

M	NEWS

commit 2fe4b329ad4d3f242b0bd73295375e70be79187b
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun May 18 10:59:06 2014 -0700

    applied chromium patch fixing some build issue on android

    This applies patch from: https://codereview.chromium.org/284843002/ by
    jungjik.lee@samsung.com

M	src/libc_override_gcc_and_weak.h

commit c009398e3239be8ae6185ad83685caf7458c49bb
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Jun 15 12:53:14 2014 -0700

    issue-628:package missing stacktrace_powerpc-{linux,darwin}-inl.h

    This headers were missing in .tar.gz because they were not mentioned
    anywhere in Makefile.am.

M	Makefile.am

commit 81d99f21ede78ab8d5fec15d0055416ac1b581f3
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date:	Tue Jun 3 07:50:56 2014 -0500

    issue-626: Fix SetupAggressiveDecommit initialization

    This patch fixes the SetupAggressiveDecommit initialization to
    run after
    pageheap_ creation.  Current code it not enforcing it, since
    InitStaticVars is being called outside the static_vars module.

M	src/static_vars.cc

commit 846b775dfadb77901202ae7ddbac30ad1de7df01
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat May 3 17:50:11 2014 -0700

    bumped version to 2.2

M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit cdf8e1e932016bd5f1737e1f10bce07226228d15
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat May 3 17:44:38 2014 -0700

    updated NEWS for 2.2

M	NEWS

commit 0807476f56b9dc024375467be0f0b07fae3ee7fb
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat May 3 17:38:14 2014 -0700

    issue-620: windows dll patching: fixed delete of old stub code

    After code for issue 359 was applied PreamblePatcher started using
    it's own code to manage memory of stub code fragments. It's not using
    new[] anymore. And it automatically frees stub code memory on
    Unpatch.

    Clearly, author of that code forgot to remote that no more needed
    delete call. With that delete call we end up trying to free memory
    that was never allocated with any of known allocators and crash.

M	src/windows/patch_functions.cc

commit facd7e83b341e069875b7c1cd7774cf671d932b5
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Apr 19 11:08:51 2014 -0700

    bumped version to 2.1.90

M	configure.ac
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit e8e082af25952e9bd10c37c3f028c91fcbbd1cbd
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Apr 19 13:16:02 2014 -0700

    updated NEWS for 2.2rc

M	NEWS

commit 802fdb739e7aabcb15443030842a2137a5559338
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Apr 12 18:07:11 2014 -0700

    issue-610: use TCMallocGetenvSafe from inside malloc

    Instead of plain getenv. So that windows getenv implementation that
    may call malloc does not deadlock.

M	src/common.cc
M	src/thread_cache.cc

commit 6b83516adefcf0806825f6dba2eb2232615d744b
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Apr 12 18:06:32 2014 -0700

    issue-610: made dynamic_annotations.c use TCMallocGetenvSafe

M	src/base/dynamic_annotations.c

commit aeef3b44201ba663c19ca1c97792b724346e84a9
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Apr 12 18:05:59 2014 -0700

    issue-610: introduced TCMallocGetenvSafe

    This is version of GetenvBeforeMain that's available to C code.

M	Makefile.am
M	src/base/sysinfo.cc
A	src/getenv_safe.h

commit 125e5ed58b72550e6b74e0139c2c3dd5e262a6ec
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Apr 12 12:38:19 2014 -0700

    don't enable backtrace() for stacktrace capturing by default

    Because we don't yet have a treatment for deadlocks that are caused by
    (recursive) use of malloc from within that facility.

M	configure.ac

commit 75b65f96b0bb44d70e0a461a03a3f8c928390283
Author: Raphael Moreira Zinsly <rzinsly@linux.vnet.ibm.com>
Date:	Tue Apr 8 17:45:13 2014 -0300

    PowerPC: stacktrace function refactor and fixes

    This patch fixes the stacktrace creating when the function is
    interrupted by a signal. For Linux, the vDSO signal trampoline
    symbol is
    compared against LR from stack backchain and handled different in that
    case (since the signal trampoline layout a different stack frame).

    Because of this extensive change the PowerPC stacktrace code has now
    been refactored to split in Linux and Darwin specific codes.

M	src/stacktrace.cc
A	src/stacktrace_powerpc-darwin-inl.h
A	src/stacktrace_powerpc-linux-inl.h

commit 8deea9ff2a3e6eef8af64ea0727d6cb840c13769
Author: Raphael Moreira Zinsly <rzinsly@linux.vnet.ibm.com>
Date:	Tue Apr 8 17:44:08 2014 -0300

    VDSOsupport cleanup

    This patch cleans up unused VDSO getcpu racking from VDSOsupport
    class,
    since the code is not used anywhere in gperftools and symbol name
    is not
    architecture independent.

M	src/base/vdso_support.cc
M	src/base/vdso_support.h

commit 9d5e1a0aa5a6ad1c7af18b65016fa5c9b7fccb47
Author: Raphael Moreira Zinsly <rzinsly@linux.vnet.ibm.com>
Date:	Tue Apr 8 17:43:11 2014 -0300

    Fixed issues with heap checker on PPC64 LE.

    Fixed the wrapper for the syscall sys_clone and the test for heap
    checker on PPC64 LE. Both use the ODP structure, which is only
    used on BE architectures.

M	src/base/linux_syscall_support.h
M	src/tests/heap-checker_unittest.cc

commit 49237462c8ae7920332c1034c623e57b50a6109c
Author: Raphael Moreira Zinsly <rzinsly@linux.vnet.ibm.com>
Date:	Tue Apr 8 17:42:17 2014 -0300

    Fixed the way that pprof packed profile data in BE.

    pprof was writing profile data in a way that only works for
    little-endian
    files, this patch verifies if the system is big-endian and writes
    packed
    data correctly.

M	src/pprof

commit a1ae66ef110bd87ff97903e86fd84c745db24646
Author: Raphael Moreira Zinsly <rzinsly@linux.vnet.ibm.com>
Date:	Tue Apr 8 17:37:29 2014 -0300

    Fixed the use of addr2line to discover the separator symbol.

    In systems where addr2line has a version greater than 2.22 pprof fails
    in discover the separator symbol (_fini). This patch identifies if
    addr2line can find the symbol, otherwise pprof uses objdump to recover
    a address that addr2line's newer versions can recognize as the
    separator
    function.

M	src/pprof

commit 8b2e5ee831760a94bc407dc255a522eda242b04f
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Tue Apr 1 22:29:11 2014 -0700

    issue-614: use tc_memalign in ReallocAfterMemalloc test

    Because some OSes lack plain memalign. And we really need to test our
    implementation which is always available via tc_malloc.

M	configure.ac
M	src/tests/debugallocation_test.cc

commit 0399af1019240e2d9127a588ddc8e31ff4656df0
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Tue Apr 1 21:30:27 2014 -0700

    added tc_malloc_skip_new_handler

    This is port of corresponding chromium change at:
    https://codereview.chromium.org/55333002/

    Basic idea is that sometimes apps that use tc_set_new_mode in order to
    have C++ out-of-memory handler catch OOMs in malloc, need to invoke
    usual malloc that returns 0 on OOM.

    That new API is exactly for that. It'll always return NULL on OOM even
    if tc_new_mode is set to true.

M	src/debugallocation.cc
M	src/gperftools/tcmalloc.h.in
M	src/tcmalloc.cc
M	src/tests/tcmalloc_unittest.cc
M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in

commit d77317247e1c8de1ea4e0419318b26f636e64431
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Mar 1 12:13:02 2014 -0800

    issue deprecation warning on use of google/ headers

M	src/google/heap-checker.h
M	src/google/heap-profiler.h
M	src/google/malloc_extension.h
M	src/google/malloc_extension_c.h
M	src/google/malloc_hook.h
M	src/google/malloc_hook_c.h
M	src/google/profiler.h
M	src/google/stacktrace.h
M	src/google/tcmalloc.h

commit e7297f0c14b0c09ec52707ed7477c7aee43a1882
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Mar 15 12:44:11 2014 -0700

    speed up MallocExtension::instance()

    It was reported that pthread_once is expensive, especially on ppc.

    In new implementation in hot path instead of doing potentially
    expensive atomic read with barrier, we do just plain read.

    It's slightly less robust than older implementation, but it should be
    faster.

    New code is making assumption that programs do not spawn threads
    before main() is called. And therefore all variables & modules are
    initialized before threads are created. Which looks like pretty safe
    assumption. With that assumption, doing plain read is safe, because
    current_instance is initialized as part of module init and therefore
    before threads are spawned.

    This patch is based on feedback of Adhemerval Zanella.

M	src/malloc_extension.cc

commit df227794361f9725eca7420d95e65ab997c79716
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date:	Sun Feb 2 19:32:37 2014 -0200

    Fix getpc_test for PPC64v2 LE

    This patch fix the PPC64 guard to get the function address for
    PPC64v2.
    It removes the use of an indirection (to get the ODP text address),
    since the PPCv2 does not have function descriptors.

M	src/tests/getpc_test.cc

commit e3deb42d5dcdeeb8a340d03f207f2488ef3fb2eb
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Mar 29 13:28:01 2014 -0700

    issue-613: remove friend declaration from HeapLeakChecker

    This applies patch by davide.italiano@10gen.com:

    heap-checker.h contains the following friend declaration of main:
    friend int main(int, char**).

    C99 allows another declaration of main, i.e. int main(int, char**,
    char**), and if code uses it and includes the heap-checker header,
    this might result in a conflict, e.g.

    error: declaration of C function 'int main(int, char**, char**)'
    conflicts with
     int main(int argc, char* argv[], char** envp)

    Actually the comment above the friend declaration of main() mentions
    that this is required to get the unittest working and for other
    internal usage, but I'm not completely sure if this is true as long as
    I'm able to build and run the unittest removing the declaration.

M	src/gperftools/heap-checker.h

commit 1a28754656bd6dfc1297d62a4c5811b0a5f03180
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Mar 29 13:23:00 2014 -0700

    issue-612: added missing include for std::min

    Otherwise Visual Studio 2013 rightfully complains

M	src/windows/system-alloc.cc

commit fe566314267fc3f67c5068d0afe004b1733ff19a
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Mar 1 12:38:08 2014 -0800

    unbreak building with libunwind

    Caused by premature merging of previous patch.

    When we're searching for backtrace in libexecinfo and don't find it,
    we should not reset UNWIND_LIBS to empty value.

    Correct fix is to first search for backtrace in libunwind and then to
    search for it in libexecinfo.

M	configure.ac

commit 91179961490a601f2c611889b3075e995fa5437e
Author: Thomas Klausner <wiz@NetBSD.org>
Date:	Tue Feb 25 21:41:28 2014 +0100

    Look for backtrace() in libexecinfo as well.

    Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>

M	configure.ac

commit fd3379a213b2a99a72a7544b6208056daf15d0d2
Author: Thomas Klausner <wiz@NetBSD.org>
Date:	Tue Feb 25 21:41:07 2014 +0100

    Fix unportable test(1) construct.

    Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>

M	configure.ac

commit a7223c2a14431ffd783117c55f84a2c84423d313
Author: Thomas Klausner <wiz@NetBSD.org>
Date:	Tue Feb 25 21:40:11 2014 +0100

    Test for memalign in configure.ac. Disable a test that uses memalign
    if it is not found.

    Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>

M	configure.ac
M	src/tests/debugallocation_test.cc

commit bd9665ebbe1aca5e1ba993de4214e64ee8bbe43a
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Feb 22 13:46:42 2014 -0800

    issue-489: added tcmalloc test pass with chromium-style decommit

M	src/tests/tcmalloc_unittest.sh

commit 6a000d6dd5968ac29f8fc43f7dfc736338e11781
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Feb 22 13:46:11 2014 -0800

    issue-489: added unit test for chromium-style decommitting

M	src/tests/tcmalloc_unittest.cc

commit eb2d69014cb3e163f2ab3ed676fbedf5c3a97caa
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Feb 22 13:10:08 2014 -0800

    issue-489: made tests pass on enabled chromium-style decommitting

M	src/tests/tcmalloc_unittest.cc

commit a92fc76f72318f7a46e91d9ef6dd24f2bcf44802
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Feb 22 13:09:05 2014 -0800

    issue-489: enable chromium-style decommitting on env variable

    TCMALLOC_AGGRESSIVE_DECOMMIT=t now enables aggressive decommitting by
    default.

M	src/static_vars.cc

commit c7ce50cd04ea08bd20d4ea4b2924e6a4451d2565
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 9 17:35:24 2013 -0800

    issue-489: implemented API to set chromium-style de-committing

    Chrome has code to decommit (release back to OS) every span that's
    released. I don't want to make it default, but indeed some
    applications may want to enable this mode.

    The code itself is taken from 2-way-merging of code from Chromium
    fork.

M	src/page_heap.cc
M	src/page_heap.h
M	src/tcmalloc.cc

commit 1d707cd4a3dfe6f238a530f945291acfd5995042
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 9 17:19:34 2013 -0800

    issue-489: fixed warning

    Computing certain values just for ASSERT raises just warning from
    compiler because if NDEBUG is set those are dead code.

M	src/page_heap.cc

commit 91bffcbad60d84beebe8b69a1db6c85c10fc04bf
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 9 16:22:35 2013 -0800

    issue-489: ported chromium windows decommitting code

    I tried to do it cleanly with merges but chromium code has so many
    relevant commits (with frequent reverts) that makes it near
    impossible.

    Simpler 2-way emerge-files worked in the end. I've removed chromium's
    aggressive 'always decommit' behavior which I want to make optional
    later.

    Majority of this work is the following commits (but there are more,
    particularly against port.cc):

    commit 9c92338c5f8770c440799d24387c3733fd6d826b
    Author: jamesr@chromium.org
    <jamesr@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
    Date:   Tue Oct 6 18:33:31 2009 +0000

	Tracks the amount of committed vs uncommitted memory in tcmalloc's
	page heap's freelists

	Keeps track of the number of reserved but not committed pages in
	the freelist and uses that to calculate a waste metric, which is
	the ratio of committed pages vs pages used by the application.
	This is exposed in the GetStats() call (which is used for
	about:tcmalloc) and through GetNumericalProperty() in Malloc

	BUG=none
	TEST=open about:tcmalloc and monitor 'WASTE' columns while using
	the browser

	Review URL: http://codereview.chromium.org/251065

	git-svn-id: svn://svn.chromium.org/chrome/trunk/src@28133
	0039d316-1c4b-4281-b951-d872f2087c98

    commit aef4f1be3eec2059a7c6e2c106050a5f3d6ccf12
    Author: jar@chromium.org
    <jar@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
    Date:   Mon Oct 5 17:58:51 2009 +0000

	Revert further back to MBelshe's baseline forking TCMalloc

	This changes to decommitting in all paths through the
	page_heap delete method (which adds spans to the free lists).

	r=mbelshe,jamesr
	Review URL: http://codereview.chromium.org/255067

	git-svn-id: svn://svn.chromium.org/chrome/trunk/src@28006
	0039d316-1c4b-4281-b951-d872f2087c98

    commit e94afbb913b95f512cb8745a2729c73f82b15ae7
    Author: jar@chromium.org
    <jar@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
    Date:   Thu Oct 1 00:25:41 2009 +0000

	Rollback Scavenge implemetation and rely on existing functionality
	to free

	This is a landing of a patch provided by antonm.  See:
	http://codereview.chromium.org/235022

	Also included change to browser_about_handler.cc to fix build,
	and I set
	TCMALLOC_RELEASE_RATE to 1.0 on line 40 of page_heap.cc (I
	think this
	was an inadvertent rollback element).

	r=antonm
	Review URL: http://codereview.chromium.org/257009

	git-svn-id: svn://svn.chromium.org/chrome/trunk/src@27692
	0039d316-1c4b-4281-b951-d872f2087c98

    commit c585892d2c42a47c95d06a684a6685156c545403
    Author: mbelshe@google.com
    <mbelshe@google.com@0039d316-1c4b-4281-b951-d872f2087c98>
    Date:   Wed Sep 2 17:33:23 2009 +0000

	Landing for Anton Muhin's tcmalloc patch:
	http://codereview.chromium.org/180021/show

	Restore decommitting in IncrementalScavenge and draft Scavenge
	method to
	be invoked periodically
	to reduce amount of committed pages.

	BUG=none
	TEST=none

	Review URL: http://codereview.chromium.org/187008

	git-svn-id: svn://svn.chromium.org/chrome/trunk/src@25188
	0039d316-1c4b-4281-b951-d872f2087c98

    commit 14239acc00731e94736ac62e80fc6b17c31ea131
    Author: mbelshe@google.com
    <mbelshe@google.com@0039d316-1c4b-4281-b951-d872f2087c98>
    Date:   Wed Aug 12 02:17:14 2009 +0000

	Major changes to the Chrome allocator.

	Changes include:
	* Fix tcmalloc to release memory.  Implements the
	TCMalloc_SystemCommit()
	  mechanism so that tcmalloc can implement SystemRelease()
	  and later
	  reuse that memory.
	* Enable dynamic switching of allocators based on an environment
	variable.
	  Users can now switch between tcmalloc, jemalloc, the default
	  windows
	  heap, and the windows low-fragmentation heap.
	* Implements set_new_mode() across all allocators so that we
	can be sure
	  that out-of-memory conditions are handled safely.

	BUG=18345
	TEST=none; plan to get all unit tests running through these
	allocators.

	Review URL: http://codereview.chromium.org/165275

	git-svn-id: svn://svn.chromium.org/chrome/trunk/src@23140
	0039d316-1c4b-4281-b951-d872f2087c98

M	src/page_heap.cc
M	src/page_heap.h
M	src/system-alloc.cc
M	src/system-alloc.h
M	src/windows/system-alloc.cc

commit 7be2edfe7f09e7e8c123e958742815784a718880
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Feb 22 12:14:11 2014 -0800

    issue-525: only warn if --enable-frame-pointers are not given

    This fixes issue when frame pointers warning is given even if frame
    pointers are enabled

M	configure.ac

commit 7e24b6ca2aa2c15a24504c02fad09f47e1ece8b5
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Feb 16 17:04:26 2014 -0800

    added debugallocation check for offset_ corruption

    It was previously possible (although unlikely) for damaged offset_
    field
    to lead FromRawPointer implementation into different MallocBlock.

    As is usual with any damage, it's best to catch errors at earliest
    possible time.

M	src/debugallocation.cc

commit 6dcd73f1eb5ce2cc44ab918c53cd42c472f44c52
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Feb 16 16:59:43 2014 -0800

    avoid crash in DebugMallocImplementation::GetOwnership

    It was possible that if GetOwnership is passed pointer to memory not
    owned by tcmalloc, it would crash. Or incorrectly return
    owned. I.e. due to indirection in FromRawPointer.

    New implementation prevents that, but introduces different bug
    instead. New implementation incorrectly returns "not owned" for
    memalign chunks with big alignment. But in can be argued that passing
    pointer returned from different memalign implementation did not work
    previously too.

M	src/debugallocation.cc

commit 33280ffb71fc0e4eb75e455d53824c344d011e35
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Feb 16 16:25:14 2014 -0800

    removed unused "using" in malloc_extension_test.cc

M	src/tests/malloc_extension_test.cc

commit 066e524d6e33e9e3364bb6819f98a02b347c14ef
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Feb 16 14:58:35 2014 -0800

    eliminated useless BASE_XXX defines in debugallocation.cc

    And closed TODO entry for that.

M	src/debugallocation.cc

commit a2375a1f360c0451ec2a2b852ea26a71fb731727
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Feb 16 14:49:57 2014 -0800

    issue-464: correctly handle realloc after memalign in debugalloc

    debug memalign is creating special header block to allow us to find
    real allocated block. And previous implementation of data copying
    wasn't taking that into account and was copying that "alignment
    header" into newly allocated block.

M	src/debugallocation.cc
M	src/tests/debugallocation_test.cc

commit d31f522f0e1b0e87ee3d5941e331ba745a0f5c23
Author: Riku Voipio <riku.voipio@linaro.org>
Date:	Mon Feb 3 16:31:32 2014 +0200

    Add aarch64 defines

    With atomic operations and system call support in place, enable
    with __aarch64__ defines Aarch64 support in other files around
    the google-perftools header files. After these, google-perftools
    testsuite (make check) results:

    8 of 46 tests failed.

    FAIL: sampling_test.sh
    FAIL: heap-profiler_unittest.sh
    FAIL: heap-checker_unittest.sh
    FAIL: heap-checker-death_unittest.sh
    FAIL: sampling_debug_test.sh
    FAIL: heap-profiler_debug_unittest.sh
    FAIL: heap-checker_debug_unittest.sh
    FAIL: profiler_unittest.sh

    While it indicates that there is still work to do, This is still
    better than the result I get on ARMv7:

    12 of 46 tests failed.

M	src/base/basictypes.h
M	src/base/cycleclock.h
M	src/base/linuxthreads.h
M	src/malloc_hook_mmap_linux.h

commit 15b5e7a35c83ce5d38fa523f2c291a2ac30bb8ed
Author: Riku Voipio <riku.voipio@linaro.org>
Date:	Tue Feb 4 11:09:47 2014 +0200

    linux_syscall_support.h: add aarch64 support

    Aarch64 support for linux_syscall_support.h. Since Aarch64 is a brand
    new architecture, none of the legacy system calls are neccesarily
    available. Thus some changes were neccesary affect other architectures
    as well:

    1) use getdents64 where available and else getdents (for ppc64)

    2) other legacy system calls, pipe, waitpid and open replaced
    by pipe2,
       wait4 and openat where available.

    3) use fstatat if stat is not available.

    The aarch64 system call interface follows the Aarch64 calling
    convention
    (regs x0-x5 for arguments and x8 system call number - return in x0).
    Clone implementation is adapted from glibc.

    v2: step back in getdents removal due to ppc64

M	src/base/linux_syscall_support.h
M	src/base/linuxthreads.cc

commit b5e584dfdc22328f713488311707f502aa77ff5f
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Feb 16 19:41:37 2014 -0800

    issue-525: warn user on lack of libunwind but don't fail

    Because we now have access to other backtrace capturing method(s) at
    runtime.

M	configure.ac

commit 90ba15d1f2f6704af96f62ce1e8c5f214697bab1
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Feb 8 15:30:36 2014 -0800

    issue-604: implement runtime-selectable stacktrace capturing

    We're now building all supported stacktrace capturing methods. And
    there's now a way to select at runtime which method is used.

M	Makefile.am
M	configure.ac
M	src/stacktrace.cc
M	src/stacktrace_arm-inl.h
D	src/stacktrace_config.h
M	src/stacktrace_generic-inl.h
C055	src/stacktrace.cc	src/stacktrace_impl_setup-inl.h
M	src/stacktrace_instrument-inl.h
M	src/stacktrace_libunwind-inl.h
M	src/stacktrace_powerpc-inl.h
M	src/stacktrace_win32-inl.h
M	src/stacktrace_x86-inl.h

commit 33f6781d64af88ea23698a084188d8c2ab94ecb1
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Feb 16 18:47:04 2014 -0800

    issue-605: avoid compilation errors if pthread_key_t is pointer

    Which seems to be the case on later cygwin

M	src/maybe_threads.cc

commit 100f310088aa30d347cd5d07bbe9d9f80cf2c2d0
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Feb 16 18:27:14 2014 -0800

    unbreak make dist

M	Makefile.am

commit a0ed9ace534372fbeee9bfefd6e26b922f0a1835
Author: Wang YanQing <udknight@gmail.com>
Date:	Tue Feb 11 23:20:31 2014 +0800

    debugallocation: fix bus error on mipsel-linux platform when enable
    use_malloc_page_fence

    Fix below "BUS ERROR" issue:

    a0 hold start address of memory block allocated by DebugAllocate
    in debugallocation.cc

    gdb) info registers
	      zero	 at	  v0	   v1	    a0	     a1
	      a2       a3
     R0   00000000 10008700 772f62a0 00084d40 766dcfef 7fb5f420 00000000
     004b4dd8
		t0	 t1	  t2	   t3	    t4	     t5
		t6	 t7
     R8   7713c1a0 7712dbc0 ffffffff 777bc000 f0000000 00000001 00000000
     00403d10
		s0	 s1	  s2	   s3	    s4	     s5
		s6	 s7
     R16  7fb5ff1c 00401b9c 77050020 7fb5fb18 00000000 004cb008 004ca748
     ffffffff
		t8	 t9	  k0	   k1	    gp	     sp
		s8	 ra
     R24  0000002f 771adcd4 00000000 00000000 771f4140 7fb5f408 7fb5f430
     771add6c
		sr	 lo	  hi	  bad	 cause	     pc
	  00008713 0000e9fe 00000334 766dcff7 00800010 771adcfc
	       fsr	fir
	  00000004 00000000

    (gdb) disassemble
    Dump of assembler code for function _ZNSs4_Rep10_M_disposeERKSaIcE:
       0x771adcd4 <+0>:     lui     gp,0x4
       0x771adcd8 <+4>:     addiu   gp,gp,25708
       0x771adcdc <+8>:     addu    gp,gp,t9
       0x771adce0 <+12>:    lw	    v0,-28696(gp)
       0x771adce4 <+16>:    beq     a0,v0,0x771add38
       <_ZNSs4_Rep10_M_disposeERKSaIcE+100>
       0x771adce8 <+20>:    nop
       0x771adcec <+24>:    lw	    v0,-30356(gp)
       0x771adcf0 <+28>:    beqzl   v0,0x771add1c
       <_ZNSs4_Rep10_M_disposeERKSaIcE+72>
       0x771adcf4 <+32>:    lw	    v0,8(a0)
       0x771adcf8 <+36>:    sync
    => 0x771adcfc <+40>:    ll	    v0,8(a0)
       0x771add00 <+44>:    addiu   at,v0,-1
       0x771add04 <+48>:    sc	    at,8(a0)
       0x771add08 <+52>:    beqz    at,0x771adcfc
       <_ZNSs4_Rep10_M_disposeERKSaIcE+40>
       0x771add0c <+56>:    nop
       0x771add10 <+60>:    sync
       0x771add14 <+64>:    b	    0x771add24
       <_ZNSs4_Rep10_M_disposeERKSaIcE+80>
       0x771add18 <+68>:    nop
       0x771add1c <+72>:    addiu   v1,v0,-1
       0x771add20 <+76>:    sw	    v1,8(a0)
       0x771add24 <+80>:    bgtz    v0,0x771add38
       <_ZNSs4_Rep10_M_disposeERKSaIcE+100>
       0x771add28 <+84>:    nop
       0x771add2c <+88>:    lw	    t9,-27072(gp)
       0x771add30 <+92>:    jr	    t9
       0x771add34 <+96>:    nop
       0x771add38 <+100>:   jr	    ra
       0x771add3c <+104>:   nop
    End of assembler dump.

    ll instruction manual:
    Load Linked:
    Loads the destination register with the contents of the word
    that is at the memory location. This instruction implicity performs
    a SYNC operation; all loads and stores to shared memory fetched prior
    to the ll must access memory before the ll, and loads and stores to
    shared memory fetched subsequent to the ll must access memory
    after ll.
    Load Linked and Store Conditional can be use to automatically update
    memory locations. *This instruction is not valid in the mips1
    architectures.
    The machine signals an address exception when the effective address
    is not
    divisible by four.

    Signed-off-by: Wang YanQing <udknight@gmail.com>
    Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>
    [alk@tut.by: removed addition of unused #include]

M	src/debugallocation.cc

commit 38bfc7a1c2f9ba718bcaa9b82fdcd9c429c8f85f
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Feb 8 14:10:11 2014 -0800

    removed irrelevant comment

M	src/base/atomicops.h

commit d03c467a3446088b229f0106d9f47fab6d7c52a4
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Feb 8 13:35:16 2014 -0800

    allow asking for gcc atomics on all platforms

    I.e. by doing ./configure CPPFLAGS=-DTCMALLOC_PREFER_GCC_ATOMICS

M	src/base/atomicops.h

commit 6de1f38b687e3974d67adad45217f35a2c376049
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Feb 8 13:43:04 2014 -0800

    chmod -x configure.ac

    Because configure.ac is not really executable. And because it
    interferes with tab completion of configure.

M	configure.ac

commit e8fe990fa06e337a07059c55adc6ed2a0888de95
Author: Riku Voipio <riku.voipio@linaro.org>
Date:	Wed Jan 29 10:54:29 2014 +0200

    implement atomics with gcc intrinsics

    Gcc after 4.7 provides atomic builtins[1]. Use these instead of adding
    yet-another-assembly port for Aarch64 (64-bit ARM). This patch enables
    succesfully building and running atomicops unittest on Aarch64.

    This patch enables using gcc builtins only when no assembly
    implementation is provided. But as a quick check, atomicops_unittest
    and rest of testsuite passes with atomicops-internals-gcc also
    ARMv7 and X86_64 if the ifdef in atomicops is adjusted to prefer
    the generic implementation.

    [1] http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html

A	src/base/atomicops-internals-gcc.h
M	src/base/atomicops.h

commit fa4b1c401da1ac381d4d72172825231b3d5518d9
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Jan 19 22:37:44 2014 -0800

    issue-599: fixing FreeBSD issue with sbrk

    Applied patch by yurivict.

    It was wrong assembly specifically for FreeBSD in sbrk overriding
    code.

M	src/malloc_hook_mmap_freebsd.h

commit 71a239e559c9ea2300ad0511f8de7077db5369c3
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Jan 19 12:30:53 2014 -0800

    check debug_malloc_implementation_space via COMPILE_ASSERT

    Because we can and because compile-time is always better.

M	src/debugallocation.cc

commit 54568e32fc2321e0adef15fb1eab4e3a7f8ce5b0
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 21 18:14:00 2013 -0700

    issue-565: don't pollute global namespace with thread lister API

    Instead those functions that are original taken from google's "base"
    code now have prefix TCMalloc_. So that they don't conflict with other
    google's libraries having same functions.

M	src/base/linuxthreads.cc
M	src/base/thread_lister.c
M	src/base/thread_lister.h
M	src/gperftools/heap-checker.h
M	src/heap-checker.cc
M	src/memory_region_map.h

commit 64bc1baa1f4723d73ba40cd730b72896bd45a810
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat May 18 17:11:58 2013 -0700

    issue-{66,547}: use signal's ucontext when unwinding backtrace

    In issue-66 (and readme) it is pointed out that sometimes there are
    some issues grabbing backtrace across signal handler boundary.

    This code attempts to fix it by grabbing backtrace from signal's
    ucontext which clearly does not include signal handler boundary.

    We're using "feature" of libunwind that for some important platforms
    libunwind's context is same as libc's ucontext_t which is given to us
    as part of calling signal handler.

M	src/stacktrace_libunwind-inl.h

commit 185bf3fcc36f8cb3839abdfe652f615bfb5306d1
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jan 11 12:46:02 2014 -0800

    issue-581: avoid destructing DebugMallocImplementation

    Because otherwise destructor might be invoked well before other places
    that might touch malloc extension instance.

    We're using placement new to initialize it and pass pointer to
    MallocExtension::Register. Which ensures that destructor for it is
    never run.

    Based on idea suggested by Andrew C. Morrow.

M	src/debugallocation.cc

commit 48a0d131c1aa088c6075e9c4676ee430f81d8600
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jan 18 13:27:41 2014 -0800

    issue-548: pass -fno-builtin to compiler for unittests

    Because clang doesn't understand -fno-builtin-malloc and friends. And
    otherwise new/delete pairs get optimized away causing our tests that
    expect hooks to be called to fail.

M	Makefile.am

commit e98371540d63dde53ce4b7c772d78c1da6b59ea8
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jan 11 16:28:15 2014 -0800

    eliminated gcc warning on __thread configure snippet

    gcc complained about lack of matching ' in code that force-fails
    __thread detection on mingw

M	configure.ac

commit 60b12171bc73117c0108b847bb310af095cd2778
Author: xiaoyur347 <xiaoyur347@gmail.com>
Date:	Sat Jan 11 11:39:53 2014 +0800

    fix GCC version detect for platforms other than X86/X64

    [alk@tut.by: commented why we're disabling __thread not just for x86]

    Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>

M	configure.ac

commit 764d304222f0c3057ab99babd06246016cbfa505
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Jan 5 12:49:23 2014 -0800

    don't re-define strtoq for VS2013

    Which is part of previous change that wasn't correctly applied.

M	src/windows/port.h

commit 1fc768864d506466b45f3f38474912bcb69bb772
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jan 4 18:28:36 2014 -0800

    fix compilation under VS 2013

    This is essentially a copy of corresponding chromium change from:
    https://codereview.chromium.org/27017003

M	src/windows/port.cc
M	src/windows/port.h

commit 4c274b9e20132230e62117ff583ebadd83081d90
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jan 4 18:28:36 2014 -0800

    issue-592: handle recent mingw with C++11 threads

    Somehow it's c++ headers (like string) define pthread symbols without
    even us asking for. That breaks old assumption that pthread symbols
    are not available on windows.

    In order to fix that we detect this condition in configure.ac and
    avoid defining windows versions of pthread symbols.

M	Makefile.am
M	configure.ac
M	src/windows/mingw.h
M	src/windows/port.h

commit 1458ee2239e0791567e69112931dc17eb0456cf8
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jan 4 13:54:24 2014 -0800

    issue-596: removed unused AtomicIncrement operation

    There's no need for us to attempt to maintain Google's atomic ops code
    in era of C++11.

M	src/base/atomicops-internals-arm-generic.h
M	src/base/atomicops-internals-arm-v6plus.h
M	src/base/atomicops-internals-linuxppc.h
M	src/base/atomicops-internals-macosx.h
M	src/base/atomicops-internals-mips.h
M	src/base/atomicops-internals-windows.h
M	src/base/atomicops-internals-x86.h
M	src/base/atomicops.h
M	src/tests/atomicops_unittest.cc

commit 6630b24e27c6a62727fe73aaae21dcc7364b8fee
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jan 4 13:07:35 2014 -0800

    Removed unused AtomicPtr::CompareAndSwap

M	src/malloc_hook-inl.h
M	src/malloc_hook.cc

commit a15115271cc475509b17bf7fecbe1ac4966baf2e
Author: xiaoyur347 <xiaoyur347@gmail.com>
Date:	Fri Dec 20 09:41:08 2013 +0800

    add "-finstrument-functions" support for MIPS uclibc.
    should configure with CXXFLAGS="-finstrument-functions"

M	src/stacktrace_config.h
A	src/stacktrace_instrument-inl.h

commit 7c4888515ed93347d4793fc066cd6048e519a197
Author: xiaoyur347 <xiaoyur347@gmail.com>
Date:	Fri Dec 20 09:02:49 2013 +0800

    add uclibc support
    * some variables defined with "char *" should be modified to
    "const char*"
    * For uclibc, glibc's "void malloc_stats(void)" should be "void
    malloc_stats(FILE *)", is commented now.
    * For uclibc, __sbrk is with attribute "hidden", so we use mmap
    allocator for uclibc.

M	Makefile.am
M	src/heap-checker.cc
M	src/heap-profiler.cc
M	src/libc_override_gcc_and_weak.h
M	src/malloc_hook_mmap_linux.h
M	src/memory_region_map.cc
M	src/symbolize.cc
M	src/system-alloc.cc

commit 7bd193bca97d93b43ff6c824bc9f39227329312f
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Dec 14 12:03:02 2013 -0800

    issue-586: detect main executable even if PIE is active

    Previous logic of detecting main program addresses is to assume that
    main executable is at least addressess. With PIE (active by default on
    Ubuntus) it doesn't work.

    In order to deal with that, we're attempting to find main executable
    mapping in /proc/[pid]/maps. And old logic is preserved too just in
    case.

M	src/pprof

commit f8a2163b5131050765ea877e2573f4930e41f630
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Fri Dec 6 12:23:48 2013 -0800

    Added AM_MAINTAINER_MODE to disable Makefile rebuild rules

    Some people might want to check-in unpacked result on make dist into
    git. But because git doesn't preserve timestamps it would cause those
    automatic "auto-retool" rules to trigger. Sometimes even causing build
    breakage if system's autotools version don't match autotools version
    used for make dist.

    Easiest way around this problem is to simply disable those unnecessary
    "maintainer" rebuild rules. Especially given that source is always
    freely available via git and therefore there should be no reason to
    regenerate any of autotools products in 'make dist'-produced sources.

M	configure.ac

commit 925bbaea76b91bd307634908cfd6902f99804544
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 16 14:01:38 2013 -0800

    actually check result of CheckAddressBits

    Previously call to CheckAddressBits was made but nothing was done to
    it's result.

    I've also make sure that actual size is used in checks and in bumping
    up of TCMalloc_SystemTaken.

M	src/system-alloc.cc

commit f216317a879e972ceafe77e61b2d66fd5f29922e
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 16 15:05:45 2013 -0800

    use AC_PROG_LIBTOOL to summon libtool

    So that older autotools of rhel 5 can be used

M	configure.ac

commit d4f4c5a3104e30b14b1090241fb4d0fac6a0e357
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 16 14:00:19 2013 -0800

    assert that ClassSize(0) is 0 instead >=0

    Because it's return value being size_t cannot be negative
    anyways. This fixes clang warning

M	src/common.cc

commit 946203d60e50488a0b9e0fe003c13662873fa17d
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 16 13:35:59 2013 -0800

    assert key size in way that is clearer to gcc

    Both new and old asserts are checking same condition, however new
    assert helps gcc see that out of bounds access is not possible in
    root_ array.

M	src/pagemap.h

commit bf2d7bd3f8c1fb6a0843e55e652e37f4ce0fae3d
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 16 13:31:34 2013 -0800

    fixed gcc warning

    We've recently changed old_signal_handler to by integer, so comparing
    it with NULL is not good idea.

M	src/heap-profiler.cc

commit dd5f979c5e6e7e3127835a659a5af89ac21597d5
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 16 13:31:08 2013 -0800

    fixed -Wreorder warning in HeapProfileTable constructor

M	src/heap-profile-table.cc

commit e4ea98f147a7602979f70be022de068b04e68060
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 9 14:19:16 2013 -0800

    issue-585: fixed use of TCMALLOC_MAX_TOTAL_THREAD_CACHE_BYTES

    In order to apply that, we're now doing explicit EnvToInt64 call as
    part of initializing thread cache module.

M	src/thread_cache.cc

commit e0102230ec7e8304155798bf7f03d6abcd5991ee
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 16 12:03:35 2013 -0800

    issue-588: Fix profiler_unittest.cc fork()

    As suggested by Hannes Weisbach.

    Call heap-profiler_unittest with the arguments 1 -2 (one iteration, 2
    fork()ed children).

    Instead of running the test, the program crashes with a std::bad_alloc
    exception.	This is caused by unconditionally passing the
    number-of-threads-argument (0 or positive for threads, negative for
    fork()s) in RunManyThreads(), thus allocating an array of pthread_t of
    size -2.  Depending on the sign of the thread number argument either
    RunManyThreads or fork() should be called.

M	src/tests/profiler_unittest.cc

commit 2bf83af65664a2badbaebdb722ad498e8b38548c
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 16 11:35:32 2013 -0800

    issue-587: fix typos in unit test scripts

    As proposed by Hannes Weisbach.

    The argument will be garbled because of a misplaced brace, for example
    (heap-checker_unittest.sh):

    HEAP_CHECKER="${1:-$BINDIR}/heap-checker_unittest"
    which should be:
    HEAP_CHECKER="${1:-$BINDIR/heap-checker_unittest}"

    This unit test is used to check the binaries heap-checker_unittest and
    heap-checker_debug_unittest.  With the typo, the executable
    heap-checker_debug_unittest is never actually run.

M	src/tests/heap-checker-death_unittest.sh
M	src/tests/heap-checker_unittest.sh
M	src/tests/heap-profiler_unittest.sh
M	src/tests/tcmalloc_unittest.sh

commit b3b19269783cf1ed163bdb447cef9ca11b10851c
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Nov 9 12:28:55 2013 -0800

    issue-584: added license note to files without explicit license

    As suggested at corresponding chromium issue discussion it's seemingly
    sufficient to simply refer to project-wide LICENSE file.

M	src/tests/page_heap_test.cc
M	src/tests/profile-handler_unittest.cc
M	src/tests/raw_printer_test.cc
M	src/tests/stack_trace_table_test.cc
M	src/windows/config.h

commit 7be35fb0d844c73f5c5301f62074294df5acbc5c
Author: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Date:	Thu Oct 10 14:26:47 2013 +0900

    central_freelist: change fetch ordering

    When we fetch objects from the span for thread cache, we make
    reverse-ordered list against original list on the span and suppy
    this list
    to thread cache. This algorithm has trouble with newly created span.
    Newly created span has ascending ordered objects list. Since thread
    cache
    will get reverse-ordered list against it, user gets objects as
    descending order.

    Following example shows what occurs in this algorithm.

    new span: object list: 1 -> 2 -> 3 -> 4 -> 5 -> ...
    fetch N items: N -> N-1 -> N-2 -> ... -> 2 -> 1 -> NULL
    thread cache: N -> N-1 -> N-2 -> ... -> 2 -> 1 -> NULL

    user's 1st malloc: N
    user's 2nd malloc: N-1
    ...
    user's Nth malloc: 1

    In general, access memory with ascending order is better than
    descending
    order in terms of the performance. So this patch fix this situation.

    I run below program to measure performance effect.

	    #define MALLOC_SIZE (512)
	    #define CACHE_SIZE (64)
	    #define TOUCH_SIZE (512 / CACHE_SIZE)

	    array = malloc(sizeof(void *) * count);

	    for (i = 0; i < 1; i++) {
		    for (j = 0; j < count; j++) {
			    x = malloc(MALLOC_SIZE);
			    array[j] = x;
		    }
	    }

	    repeat = 10;
	    for (i = 0; i < repeat; i++) {
		    for (j = 0; j < count; j++) {
			    x = array[j];
			    for (k = 0; k < TOUCH_SIZE; k++) {
				    *(x + (k * CACHE_SIZE)) = '1';
			    }
		    }
	    }

    LD_PRELOAD=libtcmalloc_minimal.so perf stat -r 10 ./a.out 1000000

    **** Before ****
     Performance counter stats for './a.out 1000000' (10 runs):

	   2.715161299 seconds time elapsed
	   ( +-  0.07% )

    **** After ****
     Performance counter stats for './a.out 1000000' (10 runs):

	   2.259366428 seconds time elapsed
	   ( +-  0.08% )

M	src/central_freelist.cc

commit 7315b45c28564afdc2699beff934a3b45457edc6
Author: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Date:	Thu Oct 10 11:46:12 2013 +0900

    central_freelist: fetch objects as much as possible during each trial

    It is better to reduce function call if possible. If we try to fetch
    objects from one span as much as possible during each function call,
    number of function call would be reduced and this would help
    performance.

M	src/central_freelist.cc
M	src/central_freelist.h

commit cc002ea19363e1ebbd7f3e809d116ab81a6862cd
Author: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Date:	Thu Oct 10 10:06:33 2013 +0900

    skip unnecessary check during double-check SizeClass intergrity

    On initialization step, tcmalloc double-checks SizeClass integrity
    with
    all possible size values, 0 to kMaxSize. This causes tremendous
    overhead
    for short-lived applications.

    For example, consider following command.
    'find -exec grep something {} \;'

    Actual work of each grep is really small, but double-check requires
    more work. To reduce this overhead, it is best to remove double-check
    entirely. But we cannot be sure the integrity without double-checking,
    so alternative is needed.

    This patch doesn't remove double-check, instead, try to skip
    unnecessary
    check based on ClassIndex() implementation. This reduce much
    overhead and
    the code has same coverage as previous double-check. Following is
    the result of this patch.

    time LD_PRELOAD=libtcmalloc_minimal.so find ./ -exec grep "SOMETHING"
    {} \;

    * Before
    real    0m3.675s
    user    0m1.000s
    sys     0m0.640s

    * This patch
    real    0m2.833s
    user    0m0.056s
    sys     0m0.220s

    * Remove double-check entirely
    real    0m2.675s
    user    0m0.072s
    sys     0m0.184s

M	src/common.cc

commit 3e9a33e8c708ccf3ec91e3a3b14e924f5f79e4a6
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Oct 26 16:54:03 2013 -0700

    issue-583: include pthread.h into static_var.cc

    Because we're doing pthread_atfork.

    Fix suggested by user named drussel.

M	src/static_vars.cc

commit db0d5730ee059d72b895fbead5237f9cb5bbf98a
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Jun 22 13:48:11 2013 -0700

    issue-579: ensure order between memory region and libunwind locks

    I.e. to prevent possible deadlock when this locks are taked by
    different threads in different order.

    This particular problem was also reported as part of issue 66.

M	src/memory_region_map.cc

commit 42ddc8d42c82ba6f5137c26b4e7f752b1a022831
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 21 19:03:52 2013 -0700

    added emacs -*- mode lines for google coding style

M	src/addressmap-inl.h
M	src/base/atomicops-internals-arm-generic.h
M	src/base/atomicops-internals-arm-v6plus.h
M	src/base/atomicops-internals-linuxppc.h
M	src/base/atomicops-internals-macosx.h
M	src/base/atomicops-internals-mips.h
M	src/base/atomicops-internals-windows.h
M	src/base/atomicops-internals-x86.cc
M	src/base/atomicops-internals-x86.h
M	src/base/atomicops.h
M	src/base/basictypes.h
M	src/base/commandlineflags.h
M	src/base/cycleclock.h
M	src/base/elf_mem_image.cc
M	src/base/elf_mem_image.h
M	src/base/elfcore.h
M	src/base/googleinit.h
M	src/base/linux_syscall_support.h
M	src/base/linuxthreads.cc
M	src/base/logging.cc
M	src/base/logging.h
M	src/base/low_level_alloc.cc
M	src/base/low_level_alloc.h
M	src/base/simple_mutex.h
M	src/base/spinlock.cc
M	src/base/spinlock.h
M	src/base/spinlock_internal.cc
M	src/base/spinlock_internal.h
M	src/base/spinlock_linux-inl.h
M	src/base/spinlock_posix-inl.h
M	src/base/spinlock_win32-inl.h
M	src/base/stl_allocator.h
M	src/base/synchronization_profiling.h
M	src/base/sysinfo.cc
M	src/base/sysinfo.h
M	src/base/thread_lister.h
M	src/central_freelist.cc
M	src/central_freelist.h
M	src/common.cc
M	src/common.h
M	src/config_for_unittests.h
M	src/debugallocation.cc
M	src/getpc.h
M	src/gperftools/heap-checker.h
M	src/gperftools/heap-profiler.h
M	src/gperftools/malloc_extension.h
M	src/gperftools/malloc_hook.h
M	src/gperftools/profiler.h
M	src/gperftools/stacktrace.h
M	src/gperftools/tcmalloc.h.in
M	src/heap-checker-bcad.cc
M	src/heap-checker.cc
M	src/heap-profile-stats.h
M	src/heap-profile-table.cc
M	src/heap-profile-table.h
M	src/heap-profiler.cc
M	src/internal_logging.cc
M	src/internal_logging.h
M	src/libc_override.h
M	src/libc_override_gcc_and_weak.h
M	src/libc_override_glibc.h
M	src/libc_override_osx.h
M	src/libc_override_redefine.h
M	src/linked_list.h
M	src/malloc_extension.cc
M	src/malloc_hook-inl.h
M	src/malloc_hook.cc
M	src/malloc_hook_mmap_freebsd.h
M	src/malloc_hook_mmap_linux.h
M	src/maybe_threads.cc
M	src/maybe_threads.h
M	src/memfs_malloc.cc
M	src/memory_region_map.cc
M	src/memory_region_map.h
M	src/packed-cache-inl.h
M	src/page_heap.cc
M	src/page_heap.h
M	src/page_heap_allocator.h
M	src/pagemap.h
M	src/profile-handler.cc
M	src/profile-handler.h
M	src/profiledata.cc
M	src/profiledata.h
M	src/profiler.cc
M	src/raw_printer.cc
M	src/raw_printer.h
M	src/sampler.cc
M	src/sampler.h
M	src/span.cc
M	src/span.h
M	src/stack_trace_table.cc
M	src/stack_trace_table.h
M	src/stacktrace.cc
M	src/stacktrace_arm-inl.h
M	src/stacktrace_config.h
M	src/stacktrace_generic-inl.h
M	src/stacktrace_libunwind-inl.h
M	src/stacktrace_powerpc-inl.h
M	src/stacktrace_win32-inl.h
M	src/stacktrace_x86-inl.h
M	src/static_vars.cc
M	src/static_vars.h
M	src/symbolize.cc
M	src/symbolize.h
M	src/system-alloc.cc
M	src/system-alloc.h
M	src/tcmalloc.cc
M	src/tcmalloc.h
M	src/tcmalloc_guard.h
M	src/tests/addressmap_unittest.cc
M	src/tests/atomicops_unittest.cc
M	src/tests/current_allocated_bytes_test.cc
M	src/tests/debugallocation_test.cc
M	src/tests/frag_unittest.cc
M	src/tests/getpc_test.cc
M	src/tests/heap-checker_unittest.cc
M	src/tests/heap-profiler_unittest.cc
M	src/tests/low_level_alloc_unittest.cc
M	src/tests/malloc_extension_c_test.c
M	src/tests/malloc_extension_test.cc
M	src/tests/malloc_hook_test.cc
M	src/tests/markidle_unittest.cc
M	src/tests/memalign_unittest.cc
M	src/tests/packed-cache_test.cc
M	src/tests/page_heap_test.cc
M	src/tests/pagemap_unittest.cc
M	src/tests/profile-handler_unittest.cc
M	src/tests/profiledata_unittest.cc
M	src/tests/profiler_unittest.cc
M	src/tests/raw_printer_test.cc
M	src/tests/realloc_unittest.cc
M	src/tests/sampler_test.cc
M	src/tests/sampling_test.cc
M	src/tests/simple_compat_test.cc
M	src/tests/stack_trace_table_test.cc
M	src/tests/system-alloc_unittest.cc
M	src/tests/tcmalloc_large_unittest.cc
M	src/tests/tcmalloc_unittest.cc
M	src/tests/testutil.cc
M	src/tests/testutil.h
M	src/tests/thread_dealloc_unittest.cc
M	src/thread_cache.cc
M	src/thread_cache.h
M	src/windows/auto_testing_hook.h
M	src/windows/get_mangled_names.cc
M	src/windows/gperftools/tcmalloc.h
M	src/windows/gperftools/tcmalloc.h.in
M	src/windows/mingw.h
M	src/windows/mini_disassembler.cc
M	src/windows/mini_disassembler.h
M	src/windows/mini_disassembler_types.h
M	src/windows/override_functions.cc
M	src/windows/port.cc
M	src/windows/port.h
M	src/windows/preamble_patcher.cc
M	src/windows/preamble_patcher.h
M	src/windows/preamble_patcher_test.cc
M	src/windows/preamble_patcher_with_stub.cc

commit 799a22624c85e8749f8bed0bfa63282b03e75bdd
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 28 19:32:20 2013 -0700

    issue-575: do not use cycle count register on arm6

    Apparently not all arm6 implementations implement it in this
    particular way.

    This applies patch by Ben Avison.

M	src/base/cycleclock.h

commit 2a2d6596f8c3d62b7ec444761f4edf0c85d10d92
Author: Petr Hosek <phosek@chromium.org>
Date:	Fri Aug 23 23:58:47 2013 -0700

    Adds system-alloc_unittest Visual Studio project

M	gperftools.sln
A	vsprojects/system-alloc_unittest/system-alloc_unittest.vcproj

commit 83aed118e009b92ea88645ef1f7b842a921612c5
Author: Petr Hosek <phosek@chromium.org>
Date:	Fri Aug 23 13:53:35 2013 -0700

    issue-567: Allows for overriding system allocator on Windows

    [alk@tut.by: minor changes to make mingw build work]
    Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>

M	Makefile.am
M	src/windows/port.cc
A	src/windows/system-alloc.cc
M	vsprojects/libtcmalloc_minimal/libtcmalloc_minimal.vcproj
M	vsprojects/tmu-static/tmu-static.vcproj

commit 4ad16873a0a2d8861a0bfe8234d45e31cc70ee90
Author: Petr Hosek <phosek@chromium.org>
Date:	Sat Aug 24 14:24:47 2013 -0700

    Exports SysAllocator class to avoid .dll build errors

M	src/gperftools/malloc_extension.h

commit 326990b5c30d249c3cf4688a88fc415b05494aca
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 14 14:38:53 2013 -0700

    issue-557: added support for dumping heap profile via signal

    This applies patch from Jean Lee.

    I've reformatted it to match surronding code style and changed
    validation logic a bit. I.e. we're not checking signal for range
    anymore given we're not sure what different platforms support, but
    we're checking return value of signal() for SIG_ERR instead.

M	src/heap-profiler.cc

commit cb65e49b83c84bc205203c12793f2dd00c4a7721
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Sep 14 16:45:42 2013 -0700

    issue-536: do not PrintStats if running under valgrind

    When we detect running under valgrind we do not initialize our own
    malloc. So trying to print malloc stats when asked via MALLOCSTATS
    cannot work.

    This does fix proposed by Philippe Waroquiers. In which we detect
    running under valgrind prior to checking MALLOCSTATS environment
    variable and refuse printing stats if we detect valgrind.

M	src/tcmalloc.cc

commit 6979583592df555a369a2c975f5117a1f61911af
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Mon Sep 9 07:59:25 2013 -0700

    issue-564: added atomic ops support for mips{,64}

    This merges patch contributed by Jovan Zelincevic.

    And with that patch tcmalloc build with --enable-minimal (just malloc
    replacement) appears to work (passes unit tests).

M	Makefile.am
A	src/base/atomicops-internals-mips.h
M	src/base/atomicops.h
M	src/base/basictypes.h
M	src/base/linux_syscall_support.h
M	src/stacktrace_config.h

commit 28dd85e2825af71138621a4417e6ab004631924d
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Fri Aug 30 16:57:14 2013 +0300

    implement pc from ucontext access for mips

M	m4/pc_from_ucontext.m4

commit 819a2b051f1dba9526f2338098fff6dd1700bdb6
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Thu Aug 29 19:00:31 2013 +0300

    issue-413: disable __thread usage on OSX

    Because it was found that __thread variables access is compiled into
    calls to tlv_get_addr which was found to call malloc. Because we
    actually use thread-local storage from inside malloc it leads to stack
    overflow. So we'll continue using pthreads API for that which is known
    to work on OSX.

M	configure.ac

commit 43809080931127037ce6e748f37a28ce7489387d
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Thu Aug 29 18:51:48 2013 +0300

    lowered autoconf requirement

    Autoconf 2.59 works. And most notably it will not affect our releases
    which are all prepared with newer autoconf.

M	configure.ac

commit 7a178d472737d988583bade3f0345201651cd43f
Author: Joon-Sung Um <joonsung.um@gmail.com>
Date:	Tue Aug 27 22:16:18 2013 +0900

    Update document for tcmalloc

    Update tcmalloc.html for new parameters.

     * kMaxSize = 256k
     * kNumClasses = 88
     * kPageShift = 13

    Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>

M	doc/tcmalloc.html

commit 313e08b5a1a951f710b0323b3ca4e1e8d869520e
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 4 20:44:06 2013 +0300

    issue-560: Revert "issue-481: ...

    ...Replaced test mechanism for distinct address spaces with a more
    reliable mechanism"

    This reverts commit 5dd53ab6cbf9d98f2d60546835e84785a104da46 (svn
    revision 167)

    With this commit rhel 6.2 fails heap-checker-death_unittest and
    without it passes.

    Ticket refers to 2 things and both are invalid:

    * that ptrace PEEKDATA ignores data argument. I've checked kernel
      source and found it to be wrong

    * something about distinct address spaces

    And in addition to all that original ticket admits that it doesn't fix
    anything.

    It looks like, compared to original code that "fix" is not succesfully
    wait-ing on parent's ptrace request. I.e. by adding some additional
    diagnostics I'm seeing this sys_waitpid returning ECHILD.

M	src/base/linuxthreads.cc

commit 6d00cbce92c5576b4bcf07a2b5634b4dcfa14f8a
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Aug 17 15:52:53 2013 +0300

    issue-561: don't cast function pointer to void *

    Which gcc-3.4 (as shipped in rhel 4) doesn't like.

    Cast to void * was originally added to avoid issue on OSX which
    doesn't have sighandler_t.

    In that place we only need to know if it's null or not. So casting to
    intptr_t looks like simplest possible way to achieve that.

M	src/profiler.cc

commit 7d8d522d737f6c55169264b35ebe0be1f9b23efd
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sat Aug 17 15:52:22 2013 +0300

    add heap-profile-stats.h to dist .tar.gz

M	Makefile.am

commit d76cfa6d6ca5944d6300765fcb9160e889423750
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 4 18:35:55 2013 +0300

    issue-502: Count m(un)map for each stacktrace in MemoryRegionMap

    ..instead of HeapProfileTable

    This upstreams chromium commit reviewed at:
    https://codereview.chromium.org/12388070

    Original and upstreaming author is: Dai MIKURUBE

    This patch fixes a bug that gperftools(TCMalloc)'s mmap profiler
    (HEAP_PROFILE_MMAP) doesn't hook some memory pages used by the
    profiler itself.

    This problem has been lived in gperftools for a long time.
    It is discussed in gperftools' issue 502.
    https://code.google.com/p/gperftools/issues/detail?id=502

    Some bugs in the mmap profiler were fixed by
    https://code.google.com/p/gperftools/issues/detail?id=383,
    but the patch in the issue 383 didn't fix the bug mentioned in
    the issue 502.

    This change reverts the previous patch and http://crrev.com/132771
    at first. Then, it modifies MemoryRegionMap to count m(un)map
    calls for each stacktrace in itself instead of merging the counts
    for each stacktrace in HeapProfileTable.

    This change also cleans up heap-profiler, heap-profile-table and
    deep-heap-profile.

    Chromium-BUG=https://code.google.com/p/chromium/issues/detail?id=181517
    Chromium-Committed:
    https://src.chromium.org/viewvc/chrome?view=rev&revision=188176

M	src/heap-checker.cc
A	src/heap-profile-stats.h
M	src/heap-profile-table.cc
M	src/heap-profile-table.h
M	src/heap-profiler.cc
M	src/memory_region_map.cc
M	src/memory_region_map.h

commit 89b163a0883d40a612331ed8565b8ab1219fdbd0
Author: Aliaksey Kandratsenka <alk@tut.by>
Date:	Sun Aug 4 18:27:07 2013 +0300

    added .gitignore

A	.gitignore

commit 18fbc316eebea9db2d7ec41e161c0a3fbb09fa42
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Wed Jul 31 04:02:19 2013 +0000

    Fix a C++11 error.

    This merges patch by Nico Weber.

    New clang versions complain in C++11 mode that:

    error: cannot initialize a variable of type 'void *' with an rvalue
    of type 'uintptr_t' (aka 'unsigned long')

    This same change was done for the google-internal version of
    tcmalloc too.

    Reviewed-at: https://codereview.appspot.com/12132043



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@238
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/stack_trace_table.cc

commit 674fcd94a8a0a3595f64e13762ba3a6529e09926
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Tue Jul 30 09:14:20 2013 +0000

    bump version to 2.1



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@236
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	NEWS
M	configure.ac
M	packages/deb/changelog
M	src/windows/config.h
M	src/windows/gperftools/tcmalloc.h

commit 805a6601939edd9bca60a8911e56b217e477c75e
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Tue Jul 30 08:30:45 2013 +0000

    issue-559: don't setup fork handler in InitStaticVars

    Because on OSX it calls malloc which leads to deadlock.

    Given that we don't really need that fork handler _that_ early, it's
    fine to change it to normal static initializer



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@235
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/static_vars.cc

commit c583a5babb54aedf6ab6e7746fd976ef2469839d
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Tue Jul 30 08:30:19 2013 +0000

    issue-559: don't depend on sighandler_t

    Which is not available on OSX.

    I've also fixed style around this place.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@234
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/profiler.cc

commit 1af20041bf5821167e69bf905596b2d45d1d94da
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Tue Jul 30 08:29:46 2013 +0000

    issue-559: AtomicWord xxx_AtomicExchange are all inline

    Otherwise OSX correctly complains about duplicate definitions



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@233
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/base/atomicops.h

commit 7a9c4e075fe2572307cddd11bc2f5c7d6b3d29ee
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Fri Jul 26 19:36:08 2013 +0000

    issue-556: update windows PACKAGE_{VERSION,STRING}



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@232
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/windows/config.h

commit 11d46f0aac5ef941b74114412bda4747a349c60d
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Fri Jul 26 19:35:38 2013 +0000

    issue-556: dll-export getpagesize

    Because page_heap_test needs this.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@231
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/windows/port.cc
M	src/windows/port.h

commit 6d4ad4428bb8f587d890fa5b7a76ba65dcf48dcb
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Fri Jul 26 19:35:20 2013 +0000

    issue-556: drop malloc limit at the end of page_heap_test

    Which otherwise causes somewhat weird stack overflow on release
    windows builds.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@230
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/tests/page_heap_test.cc

commit be54c3f3ed192eabab9b075ec924d2479a956b9d
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Fri Jul 26 19:34:54 2013 +0000

    issue-556: dll-export TCMalloc_System{Alloc,Release}

    because page_heap_test is using this stuff



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@229
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/system-alloc.h
M	src/windows/port.cc

commit e3716145cbfa1247fa37dd627b2136a061944255
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Fri Jul 26 18:19:05 2013 +0000

    issue-552: Fix page_heap_test for system with different page size

    This is patch by Adhemerval Zanella.

    PowerPC uses 64K page size instead of 4k for x86 and x86_64. It
    makes the
    page_heap_test fails because the following test:

     static bool HaveSystemRelease =
	TCMalloc_SystemRelease(TCMalloc_SystemAlloc(kPageSize, NULL,
	0), kPageSize);

    will always fail if kPageSize is less than getpagesize() (the default
    configuration).

    The following patch fixes it by trying to allocate/deallocate
    an entire
    page instead.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@228
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/tests/page_heap_test.cc

commit f45133e75c09ca7d5e86bda2db16e30c6fa348c0
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Fri Jul 26 18:04:03 2013 +0000

    issue-553: Fix syscall wrapper for PowerPC

    This is patch by Adhemerval Zanella.

    * src/stacktrace_powerpc-inl.h: It is just a cleanup for the
    stacktrace
      functions for PowerPC. The idea is to simplify the code.
    * src/tests/heap-checker_unittest.cc: Handles the PPC64 function
    descriptor
      correctly in malloc tracers. Different from other architecture,
      for PPC64
      the address returned in function pointers are the ODP entry, not the
      symbol address in .text segment. This leads the comparison bogus,
      since
      it will compare a ODP entry with a .text address.
    * src/heap-checker.cc: Add support for PPC in ptrace.
    * src/base/elfcore.h: Likewise.
    * src/base/linuxthreads.cc: Fix the thread creation using the clone
    wrapper.
    * src/base/linux_syscall_support.h: Various fixes for PPC32 and PPC64:
      fixes the kernel_stat[64] struct layout, and sys_clone and
      sys_socket
      implementation.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@227
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/base/elfcore.h
M	src/base/linux_syscall_support.h
M	src/base/linuxthreads.cc
M	src/heap-checker.cc
M	src/stacktrace_powerpc-inl.h
M	src/tests/heap-checker_unittest.cc

commit ee2bf097133b115e3da249e43507e02645e46e59
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Sat Jul 20 21:37:26 2013 +0000

    updated NEWS and packages/ for 2.1rc



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@226
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	NEWS
M	packages/deb/changelog
M	packages/deb/control
M	packages/deb/copyright
M	packages/rpm/rpm.spec

commit 60ab178aeb827378d78cae8f1c6f893b14deaaf0
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Sat Jul 20 21:37:01 2013 +0000

    bump version number for 2.1rc



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@225
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	configure.ac
M	src/windows/gperftools/tcmalloc.h

commit 7c2aa2f7c2cf901c17b9b9215224f725e798d1f2
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Sat Jul 20 21:35:56 2013 +0000

    issue-546: fixed return type of Release_AtomicExchange on arm6+



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@224
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/base/atomicops-internals-arm-v6plus.h

commit d8e12e94ea09eaf8b040c6887f75cdf832b5619b
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Sat Jul 20 21:35:14 2013 +0000

    issue-549: handle most recent mingw that has sleep and nanosleep

    I.e. we have to check their presence in configure and in case of their
    presence we have to avoid re-defining then in window's port.h



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@223
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	configure.ac
M	src/windows/port.h

commit ac354636de8a4f11e4fde679b52e9f58fda0e079
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Sun Jul 14 04:19:02 2013 +0000

    issue-550: remove config.h.in

    Which is autoconf product and thus is not needed in source repository



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@222
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

D	src/config.h.in

commit e54971d58641853a9515d9f0313645729eab113a
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Sat Jul 6 21:54:34 2013 +0000

    issue-534: fixed a number of gcc warnings

    This applies patch from Adhemerval Zanella.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@221
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/base/basictypes.h
M	src/heap-profiler.cc
M	src/profiler.cc
M	src/tests/heap-checker_unittest.cc
M	src/tests/page_heap_test.cc

commit 7dd038d7c58c9de889e3fcc552161533ea1baab1
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Sat Jul 6 20:48:18 2013 +0000

    issue-545: corrected README for CPUPROFILE_FREQUENCY variable

    Applied patch by Mikhail Veltishchev



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@220
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	README

commit a833a146b7de93774f0a9428edc5eda410d9a7dc
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Sat Jul 6 20:46:50 2013 +0000

    issue-528: fixed spelling

    This simply applies patch by Lajos Veres



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@219
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	doc/heapprofile.html
M	doc/pprof_remote_servers.html
M	src/base/spinlock.cc
M	src/base/sysinfo.cc
M	src/base/sysinfo.h
M	src/gperftools/profiler.h
M	src/pprof
M	src/stacktrace_x86-inl.h
M	src/windows/patch_functions.cc
M	src/windows/preamble_patcher.cc

commit 205abf1e7cb860224cbf391c7f69a6192ccc5076
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Sun May 12 19:15:13 2013 +0000

    issue-518: add support for x32 ABI to linux_syscall_support.h

    As pointed out in the ticket this is taken from chromium review system
    here: https://codereview.chromium.org/13648012



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@218
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/base/linux_syscall_support.h

commit 376a3107aa06063d72132318ac5ad266466e4325
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Tue May 7 22:28:05 2013 +0000

    issue-368: allocate enough bytes for large metadata allocations

    During issue-368 review it was correctly pointed out then in place
    where I compare metadata allocation size to threshold I should pass
    that size down to TCMalloc_SystemAlloc instead of threshold.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@217
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/common.cc

commit 58d39a1b2190b9d0b719ee33f7bc5383a9b27462
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Tue May 7 22:23:37 2013 +0000

    issue-368: added missing large_heap_fragmentation_unittest.cc



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@216
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

A	src/tests/large_heap_fragmentation_unittest.cc

commit c45bb7d6033952ea33bb181c1f96999317b535a1
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Tue May 7 19:22:45 2013 +0000

    issue-511: fixed negative offset handling for conditional jumps

    While doing and testing issue-511 I've found one subtle bug which is
    incorrect handling of short offsets. They are defined to be signed but
    previous code used unsigned char for them which caused negative
    offsets to look like larger positive offsets. Fix is trivial.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@215
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/windows/preamble_patcher.cc

commit 3567b1701aa55a6421aefa5f3de1ca5507cbdf79
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Tue May 7 19:15:35 2013 +0000

    issue-511: recognise rex.w jmpq *<literal>(%rip) as iat jump

    Apparently Windows Server 2012 (and presumably windows 8) now has this
    form of iat jump. Which is quite useless (rex.w is according to my
    understanding is not needed at all) but because of rex.w our code to
    recognize jumps like that didn't work.

    Fix is just skip this prefix.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@214
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/windows/preamble_patcher.cc

commit 7fcb5ac0696e7ef7f7e7e51c18745af25de7da96
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Tue May 7 19:13:29 2013 +0000

    issue-511: implemented rel8 jump patching

    I've found that Visual Studio 2012 release 32-bit C runtime library
    patching fails because array new has rel8 jmp which previous code
    could not handle.

    Implementation is largely copied from conditional jumps handling code.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@213
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/windows/preamble_patcher.cc
M	src/windows/preamble_patcher.h
M	src/windows/preamble_patcher_with_stub.cc

commit 8cb4086a0aee539869bd087a85881788545b23d6
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Mon May 6 19:50:59 2013 +0000

    issue-368: test that we don't fragment large spans too badly

    This adds unit test that does essentially same things as code to
    reproduce bug in
    https://code.google.com/p/gperftools/issues/detail?id=368




    git-svn-id: http://gperftools.googlecode.com/svn/trunk@212
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	Makefile.am

commit f25ac4421f9efb635b88105e9c0830293ce19f9d
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Mon May 6 19:50:23 2013 +0000

    issue-{368,443}: allocate metadata in big batches

    It uses same approach as PageHeapAllocator. Namely allocates big chunk
    which is then used to satisfy smaller allocations.

    In issue-443 gradual heap grows causes old code that allocates
    metadata in smaller pieces and thus more frequently to fragment the
    heap. It's also causing most of 368 heap fragmentation too.

    New code allocates 8 megs of address space at once for metadata
    allocations. Most OSes will allocate actual memory only when
    corresponding pages are touched. Thus this change should not cause
    increased memory usage.

    I've also made sure metadata is always properly aligned in case we
    ever allocate something that breaks natural alignment. E.g. strings.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@211
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/common.cc

commit 4fd762cead660d4661359ad507083ac4f4967ee4
Author: alkondratenko@gmail.com
<alkondratenko@gmail.com@6b5cf1ce-ec42-a296-1ba9-69fdba395a50>
Date:	Mon May 6 19:49:48 2013 +0000

    issue-368: unmap free spans and retry before growing heap

    Because unmapped spans are not coalesced with normal spans it's
    possible that we indeed have a large enough free span, but we fail to
    see that because we always consider unmapped and normal spans
    separately. That behavior is more likely for larger spans.

    In order to protect programs that grow heap frequently and by small
    amounts from much more frequent minor page faults, there's limit of
    running that force pages unmap path once per 128 megs of heap growth.



    git-svn-id: http://gperftools.googlecode.com/svn/trunk@210
    6b5cf1ce-ec42-a296-1ba9-69fdba395a50

M	src/page_heap.cc

commit 99fe9944de32046fd954399e60415fba7d03eeb0
Auth