Merge "[gwp-asan] fix tests under clang coverage, and extend invariants"

  if (params.free_before_access) free(static_cast<void*>(const_cast<char*>(p)));

  p[params.access_offset] = 42;

  if (!params.free_before_access) free(static_cast<void*>(const_cast<char*>(p)));

  bool recoverable = std::get<1>(GetParam());

  ASSERT_TRUE(recoverable);  // Non-recoverable should have crashed.

  // As we're in recoverable mode, trigger another 2x use-after-frees (ensuring

  // we end with at least one in a different slot), make sure the process still

  // doesn't crash.

  p = reinterpret_cast<char* volatile>(malloc(params.alloc_size));

  char* volatile p2 = reinterpret_cast<char* volatile>(malloc(params.alloc_size));

  free(static_cast<void*>(const_cast<char*>(p)));

  free(static_cast<void*>(const_cast<char*>(p2)));

  *p = 42;

  *p2 = 42;

  // Under clang coverage (which is a default TEST_MAPPING presubmit target), the

  // recoverable+seccomp tests fail because the minijail prevents some atexit syscalls that clang

  // coverage does. Thus, skip the atexit handlers.

  _exit(0);

}

TEST_F(CrasherTest, fdsan_warning_abort_message) {