[PATCH] D58379: [compiler-rt] Intercept the bcmp() function.

[Clement Courbet via Phabricator via llvm-commits]

courbet created this revision.
courbet added reviewers: mgorny, krytarowski, vitalybuka, dvyukov.
Herald added subscribers: Sanitizers, jdoerfert, delcypher, dberris, kubamracek.
Herald added projects: LLVM, Sanitizers.

I have not introduced a separate hook for `bcmp()` as I don't think there
should be any reason for a sanitizer to treat it differently from `memcmp()`.

This is only enabled when building on POSIX with GNU extensions.

Context: this is to avoid losing coverage when emitting `bcmp() == 0` instead
of `memcmp() == 0` in llvm, see https://reviews.llvm.org/D56593.


Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D58379

Files:
  lib/asan/tests/asan_mem_test.cc
  lib/sanitizer_common/sanitizer_common_interceptors.inc
  lib/sanitizer_common/sanitizer_platform_interceptors.h
  test/asan/TestCases/Posix/bcmp_test.cc
  test/sanitizer_common/TestCases/Posix/weak_hook_test.cc

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