CVS commit: src/external/gpl3/gcc/dist/libsanitizer

["Kamil Rytarowski" <kamil%netbsd.org@localhost>]

Module Name:    src
Committed By:   kamil
Date:           Fri Sep 11 01:04:34 UTC 2020

Modified Files:
        src/external/gpl3/gcc/dist/libsanitizer/asan: asan_interceptors.h
        src/external/gpl3/gcc/dist/libsanitizer/lsan: lsan_interceptors.cc
        src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common:
            sanitizer_platform_interceptors.h

Log Message:
Stop tracking atexit/__cxa_atexit/pthread_atfork allocations in LSan/NetBSD

Cherry-pick and adapt:

commit 8827047551570b7ed7088765c3de2a8cce6823b8
Author: Kamil Rytarowski <n54%gmx.com@localhost>
Date:   Sat Sep 21 07:30:42 2019 +0000

    Stop tracking atexit/__cxa_atexit/pthread_atfork allocations in LSan/NetBSD

    Summary:
    The atexit(3) and __cxa_atexit() calls allocate internally memory and free on exit,
    after executing all callback. This causes false positives as DoLeakCheck() is called
    from the atexit handler. In the LSan/ASan tests there are strict checks triggering
    false positives here.

    Intercept all atexit(3) and __cxa_atexit() calls and disable LSan when calling the
    real functions.

    Stop tracing allocations in pthread_atfork(3) funtions, as there are performed
    internal allocations that are not freed for the time of running StopTheWorld()
    code. This avoids false-positives.

    The same changes have to be replicated in the ASan and LSan runtime.

    Non-NetBSD OSs are not tested and this code is restricted to NetBSD only.

    Reviewers: dvyukov, joerg, mgorny, vitalybuka, eugenis

    Reviewed By: vitalybuka

    Subscribers: jfb, llvm-commits, #sanitizers

    Tags: #sanitizers, #llvm

    Differential Revision: https://reviews.llvm.org/D67331

    llvm-svn: 372459


To generate a diff of this commit:
cvs rdiff -u -r1.6 -r1.7 \
    src/external/gpl3/gcc/dist/libsanitizer/asan/asan_interceptors.h
cvs rdiff -u -r1.6 -r1.7 \
    src/external/gpl3/gcc/dist/libsanitizer/lsan/lsan_interceptors.cc
cvs rdiff -u -r1.8 -r1.9 \
    src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_platform_interceptors.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.