1*bcaeed49SFangrui Song // RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2*bcaeed49SFangrui Song // UNSUPPORTED: darwin
3*bcaeed49SFangrui Song #include "test.h"
4*bcaeed49SFangrui Song #include <signal.h>
5*bcaeed49SFangrui Song #include <sys/types.h>
6*bcaeed49SFangrui Song #include <sys/time.h>
7*bcaeed49SFangrui Song #include <errno.h>
8*bcaeed49SFangrui Song 
9*bcaeed49SFangrui Song volatile int X;
10*bcaeed49SFangrui Song 
handler(int sig)11*bcaeed49SFangrui Song static void handler(int sig) {
12*bcaeed49SFangrui Song   (void)sig;
13*bcaeed49SFangrui Song   if (X != 42)
14*bcaeed49SFangrui Song     printf("bad");
15*bcaeed49SFangrui Song }
16*bcaeed49SFangrui Song 
thr(void * p)17*bcaeed49SFangrui Song static void* thr(void *p) {
18*bcaeed49SFangrui Song   for (int i = 0; i != 1000; i++)
19*bcaeed49SFangrui Song     usleep(1000);  // process signals
20*bcaeed49SFangrui Song   return 0;
21*bcaeed49SFangrui Song }
22*bcaeed49SFangrui Song 
main()23*bcaeed49SFangrui Song int main() {
24*bcaeed49SFangrui Song   const int kThreads = 10;
25*bcaeed49SFangrui Song   pthread_t th[kThreads];
26*bcaeed49SFangrui Song   for (int i = 0; i < kThreads; i++)
27*bcaeed49SFangrui Song     pthread_create(&th[i], 0, thr, 0);
28*bcaeed49SFangrui Song 
29*bcaeed49SFangrui Song   X = 42;
30*bcaeed49SFangrui Song 
31*bcaeed49SFangrui Song   struct sigaction act = {};
32*bcaeed49SFangrui Song   act.sa_handler = &handler;
33*bcaeed49SFangrui Song   if (sigaction(SIGPROF, &act, 0)) {
34*bcaeed49SFangrui Song     perror("sigaction");
35*bcaeed49SFangrui Song     exit(1);
36*bcaeed49SFangrui Song   }
37*bcaeed49SFangrui Song 
38*bcaeed49SFangrui Song   itimerval t;
39*bcaeed49SFangrui Song   t.it_value.tv_sec = 0;
40*bcaeed49SFangrui Song   t.it_value.tv_usec = 10;
41*bcaeed49SFangrui Song   t.it_interval = t.it_value;
42*bcaeed49SFangrui Song   if (setitimer(ITIMER_PROF, &t, 0)) {
43*bcaeed49SFangrui Song     perror("setitimer");
44*bcaeed49SFangrui Song     exit(1);
45*bcaeed49SFangrui Song   }
46*bcaeed49SFangrui Song 
47*bcaeed49SFangrui Song   for (int i = 0; i < kThreads; i++)
48*bcaeed49SFangrui Song     pthread_join(th[i], 0);
49*bcaeed49SFangrui Song 
50*bcaeed49SFangrui Song   fprintf(stderr, "DONE\n");
51*bcaeed49SFangrui Song   return 0;
52*bcaeed49SFangrui Song }
53*bcaeed49SFangrui Song 
54*bcaeed49SFangrui Song // CHECK-NOT: WARNING: ThreadSanitizer:
55*bcaeed49SFangrui Song // CHECK: DONE
56*bcaeed49SFangrui Song // CHECK-NOT: WARNING: ThreadSanitizer:
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