compiler-rt/test/tsan/signal_thread.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
   2 // UNSUPPORTED: darwin
   3 #include <pthread.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <signal.h>
   7 #include <sys/types.h>
   8 #include <sys/time.h>
   9 #include <unistd.h>
  10 #include <errno.h>
  11
  12 volatile int X;
  13
  14 static void handler(int sig) {
  15   (void)sig;
  16   if (X != 0)
  17     printf("bad");
  18 }
  19
  20 static void* thr(void *p) {
  21   return 0;
  22 }
  23
  24 int main() {
  25   struct sigaction act = {};
  26   act.sa_handler = &handler;
  27   if (sigaction(SIGPROF, &act, 0)) {
  28     perror("sigaction");
  29     exit(1);
  30   }
  31
  32   itimerval t;
  33   t.it_value.tv_sec = 0;
  34   t.it_value.tv_usec = 10;
  35   t.it_interval = t.it_value;
  36   if (setitimer(ITIMER_PROF, &t, 0)) {
  37     perror("setitimer");
  38     exit(1);
  39   }
  40
  41   for (int i = 0; i < 10000; i++) {
  42     pthread_t th;
  43     pthread_create(&th, 0, thr, 0);
  44     pthread_join(th, 0);
  45   }
  46
  47   fprintf(stderr, "DONE\n");
  48   return 0;
  49 }
  50
  51 // CHECK-NOT: WARNING: ThreadSanitizer:
  52 // CHECK: DONE
  53 // CHECK-NOT: WARNING: ThreadSanitizer: