[all-commits] [llvm/llvm-project] 9ab590: [msan] Add bsearch interceptor

[Vitaly Buka via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9ab590e3ebb2f4a652b4cbdd3594848e8fb017fe
      https://github.com/llvm/llvm-project/commit/9ab590e3ebb2f4a652b4cbdd3594848e8fb017fe
  Author: Vitaly Buka <vitalybuka at google.com>
  Date:   2021-08-03 (Tue, 03 Aug 2021)

  Changed paths:
    M compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
    M compiler-rt/lib/sanitizer_common/sanitizer_platform_interceptors.h
    A compiler-rt/test/msan/bsearch.cpp
    A compiler-rt/test/sanitizer_common/TestCases/Posix/bsearch.cpp

  Log Message:
  -----------
  [msan] Add bsearch interceptor

Similar to qsort, bsearch can be called from non-instrumented
code of glibc. When it happends tls for arguments can be in uninitialized
state.

Unlike to qsort, bsearch does not move data, so we don't need to
check or initialize searched memory or key. Intrumented comparator will
do that on it's own.

Differential Revision: https://reviews.llvm.org/D107387