[PATCH] D19781: [ASan] Disable target-specific lowering of string functions.

[Marcin Kościelnicki via llvm-commits]

koriakin created this revision.
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CodeGen has hooks that allow targets to emit specialized code instead
of calls to memcmp, memchr, strcpy, stpcpy, strcmp, strlen, strnlen.
When AddressSanitizer is in use, this sidesteps its interceptors, resulting
in uninstrumented memory accesses.  To avoid that, make AddressSanitizer
mark the calls as nobuiltin, and make CodeGen respect the attribute.

Repository:
  rL LLVM

http://reviews.llvm.org/D19781

Files:
  lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  lib/Transforms/Instrumentation/AddressSanitizer.cpp
  test/CodeGen/SystemZ/memchr-03.ll
  test/CodeGen/SystemZ/memcmp-03.ll
  test/CodeGen/SystemZ/strcmp-03.ll
  test/CodeGen/SystemZ/strcpy-02.ll
  test/CodeGen/SystemZ/strlen-03.ll
  test/Instrumentation/AddressSanitizer/str-nobuiltin.ll

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