signal_write.cc revision 86277eb844c4983c81de62d7c050e92fe7155788 
1// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2#include <stdio.h>
3#include <stdlib.h>
4#include <signal.h>
5#include <string.h>
6#include <sys/types.h>
7#include <unistd.h>
8
9static void handler(int, siginfo_t*, void*) {
10  const char *str = "HELLO FROM SIGNAL\n";
11  write(2, str, strlen(str));
12}
13
14int main() {
15  struct sigaction act = {};
16  act.sa_sigaction = &handler;
17  sigaction(SIGPROF, &act, 0);
18  kill(getpid(), SIGPROF);
19  sleep(1);  // let the signal handler run, can't use barrier in sig handler
20  fprintf(stderr, "DONE\n");
21  return 0;
22}
23
24// CHECK-NOT: WARNING: ThreadSanitizer
25// CHECK: HELLO FROM SIGNAL
26// CHECK: DONE
27
28