[PATCH] D18329: [sanitizer] Add strchr* to the common interceptors

[Derek Bruening via llvm-commits]

bruening created this revision.
bruening added a reviewer: eugenis.
bruening added subscribers: kcc, llvm-commits, zhaoqin.

Adds strchr, strchrnul, and strrchr to the common interceptors, under a new
common flag intercept_strchr.

Removes the now-duplicate strchr interceptor from asan and all 3
interceptors from tsan.  Previously, asan did not intercept strchrnul, but
does now; previously, msan did not intercept strchr, strchrnul, or strrchr,
but does now.

http://reviews.llvm.org/D18329

Files:
  lib/asan/asan_flags.cc
  lib/asan/asan_interceptors.cc
  lib/sanitizer_common/sanitizer_common_interceptors.inc
  lib/sanitizer_common/sanitizer_flags.inc
  lib/sanitizer_common/sanitizer_platform_interceptors.h
  lib/tsan/rtl/tsan_interceptors.cc

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