compiler-rt/test/tsan/signal_pause.cpp

   1 // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2
   3 // Test that pause loop handles signals.
   4
   5 #include "test.h"
   6 #include <signal.h>
   7 #include <errno.h>
   8
   9 void handler(int signum) {
  10   write(2, "DONE\n", 5);
  11   _exit(0);
  12 }
  13
  14 void *thread(void *arg) {
  15   for (;;)
  16     pause();
  17   return 0;
  18 }
  19
  20 int main(int argc, char** argv) {
  21   struct sigaction act = {};
  22   act.sa_handler = &handler;
  23   if (sigaction(SIGUSR1, &act, 0)) {
  24     fprintf(stderr, "sigaction failed %d\n", errno);
  25     return 1;
  26   }
  27   pthread_t th;
  28   pthread_create(&th, 0, thread, 0);
  29   sleep(1);  // give it time to block in pause
  30   pthread_kill(th, SIGUSR1);
  31   sleep(10);  // signal handler must exit the process while we are here
  32   return 0;
  33 }
  34
  35 // CHECK: DONE