[all-commits] [llvm/llvm-project] f7c673: [libc] Clean up sanitizer macros

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f7c673da00e5b0a4b14d059cfdbd7655259fd74c
      https://github.com/llvm/llvm-project/commit/f7c673da00e5b0a4b14d059cfdbd7655259fd74c
  Author: Fangrui Song <i at maskray.me>
  Date:   2024-07-10 (Wed, 10 Jul 2024)

  Changed paths:
    M libc/src/__support/macros/sanitizer.h

  Log Message:
  -----------
  [libc] Clean up sanitizer macros

https://reviews.llvm.org/D99598 introduced some unneeded macros
including `ADDRESS_SANITIZER` and `MEMORY_SANITIZER`. The definitions
appeared to be from older absl/base/internal/dynamic_annotations.h,
which has then been cleaned up.

`ADDRESS_SANITIZER` is not defined by compilers. Some Bazel users define
it as part of --config=asan. If a translation unit specifies
-fno-sanitize=address, libc/src/__support/macros/sanitizer.h and
sanitizer/asan_interface.h will define ASAN_POISON_MEMORY_REGION
differently, leading to

```
libc/src/__support/macros/sanitizer.h:66:9: error: 'ASAN_UNPOISON_MEMORY_REGION' macro redefined [-Werror,-Wmacro-redefined]
   66 | #define ASAN_UNPOISON_MEMORY_REGION(addr, size)                                \
      |         ^
```

To fix this issue, just remove unneeded macros.

Pull Request: https://github.com/llvm/llvm-project/pull/98402



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