1*bcaeed49SFangrui Song // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2*bcaeed49SFangrui Song // UNSUPPORTED: darwin
3*bcaeed49SFangrui Song #include <pthread.h>
4*bcaeed49SFangrui Song #include <stdio.h>
5*bcaeed49SFangrui Song #include <stdlib.h>
6*bcaeed49SFangrui Song #include <signal.h>
7*bcaeed49SFangrui Song #include <sys/types.h>
8*bcaeed49SFangrui Song #include <sys/time.h>
9*bcaeed49SFangrui Song #include <unistd.h>
10*bcaeed49SFangrui Song #include <errno.h>
11*bcaeed49SFangrui Song 
12*bcaeed49SFangrui Song volatile int X;
13*bcaeed49SFangrui Song 
handler(int sig)14*bcaeed49SFangrui Song static void handler(int sig) {
15*bcaeed49SFangrui Song   (void)sig;
16*bcaeed49SFangrui Song   if (X != 0)
17*bcaeed49SFangrui Song     printf("bad");
18*bcaeed49SFangrui Song }
19*bcaeed49SFangrui Song 
thr(void * p)20*bcaeed49SFangrui Song static void* thr(void *p) {
21*bcaeed49SFangrui Song   return 0;
22*bcaeed49SFangrui Song }
23*bcaeed49SFangrui Song 
main()24*bcaeed49SFangrui Song int main() {
25*bcaeed49SFangrui Song   struct sigaction act = {};
26*bcaeed49SFangrui Song   act.sa_handler = &handler;
27*bcaeed49SFangrui Song   if (sigaction(SIGPROF, &act, 0)) {
28*bcaeed49SFangrui Song     perror("sigaction");
29*bcaeed49SFangrui Song     exit(1);
30*bcaeed49SFangrui Song   }
31*bcaeed49SFangrui Song 
32*bcaeed49SFangrui Song   itimerval t;
33*bcaeed49SFangrui Song   t.it_value.tv_sec = 0;
34*bcaeed49SFangrui Song   t.it_value.tv_usec = 10;
35*bcaeed49SFangrui Song   t.it_interval = t.it_value;
36*bcaeed49SFangrui Song   if (setitimer(ITIMER_PROF, &t, 0)) {
37*bcaeed49SFangrui Song     perror("setitimer");
38*bcaeed49SFangrui Song     exit(1);
39*bcaeed49SFangrui Song   }
40*bcaeed49SFangrui Song 
41*bcaeed49SFangrui Song   for (int i = 0; i < 10000; i++) {
42*bcaeed49SFangrui Song     pthread_t th;
43*bcaeed49SFangrui Song     pthread_create(&th, 0, thr, 0);
44*bcaeed49SFangrui Song     pthread_join(th, 0);
45*bcaeed49SFangrui Song   }
46*bcaeed49SFangrui Song 
47*bcaeed49SFangrui Song   fprintf(stderr, "DONE\n");
48*bcaeed49SFangrui Song   return 0;
49*bcaeed49SFangrui Song }
50*bcaeed49SFangrui Song 
51*bcaeed49SFangrui Song // CHECK-NOT: WARNING: ThreadSanitizer:
52*bcaeed49SFangrui Song // CHECK: DONE
53*bcaeed49SFangrui Song // CHECK-NOT: WARNING: ThreadSanitizer:
54