[all-commits] [llvm/llvm-project] fc4c87: [Darwin][ASan] Fix "interceptor working?" check fo...

[Julian Lettner via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fc4c872d8f1e0c3409ba1fbc4761ffc984c7fdbd
      https://github.com/llvm/llvm-project/commit/fc4c872d8f1e0c3409ba1fbc4761ffc984c7fdbd
  Author: Blue Gaston <bgaston2 at apple.com>
  Date:   2022-04-06 (Wed, 06 Apr 2022)

  Changed paths:
    M compiler-rt/lib/sanitizer_common/sanitizer_mac.cpp

  Log Message:
  -----------
  [Darwin][ASan] Fix "interceptor working?" check for DriverKit platform

The previous check for interceptors used `pthread_create()` which is not
available on DriverKit.  We need an intercepted symbol that satisfies
the following constraints:

- Symbol is available in DriverKit
- Symbol is provided by simulator runtime dylibs (`dlsym()` fails to
  look up host-provided symbols)

`puts()` satisfies all of the above constraints.

rdar://87895539

Reviewed By: yln

Differential Revision: https://reviews.llvm.org/D123245