[all-commits] [llvm/llvm-project] 53558e: sanitizer_common: fix SIG_DFL warning

[Dmitry Vyukov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 53558ed8a0abaf2f457cfa3d98c85d0fa1e84b22
      https://github.com/llvm/llvm-project/commit/53558ed8a0abaf2f457cfa3d98c85d0fa1e84b22
  Author: Dmitry Vyukov <dvyukov at google.com>
  Date:   2021-05-12 (Wed, 12 May 2021)

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

  Log Message:
  -----------
  sanitizer_common: fix SIG_DFL warning

Currently we have:

sanitizer_posix_libcdep.cpp:146:27: warning: cast between incompatible
  function types from ‘__sighandler_t’ {aka ‘void (*)(int)’} to ‘sa_sigaction_t’
  146 |     sigact.sa_sigaction = (sa_sigaction_t)SIG_DFL;

We don't set SA_SIGINFO, so we need to assign to sa_handler.
And SIG_DFL is meant for sa_handler, so this gets rid of both
compiler warning, type cast and potential runtime misbehavior.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D102162