1// RUN: %clangxx_tsan %s -o %t && %run %t 2>&1 | FileCheck %s
2// UNSUPPORTED: darwin
3
4// FIXME: Very flaky on PPC with COMPILER_RT_DEBUG.
5// https://github.com/google/sanitizers/issues/1792
6// UNSUPPORTED: !compiler-rt-optimized && ppc
7
8// Test case for https://github.com/google/sanitizers/issues/1540
9
10#include <errno.h>
11#include <pthread.h>
12#include <signal.h>
13#include <stdio.h>
14#include <stdlib.h>
15#include <sys/time.h>
16#include <sys/types.h>
17#include <unistd.h>
18
19volatile int X;
20
21static void handler(int sig) {
22 (void)sig;
23 if (X != 0)
24 printf(format: "bad");
25}
26
27static void *thr1(void *p) {
28 sleep(seconds: 1);
29 return 0;
30}
31
32static void *thr(void *p) {
33 pthread_t th[10];
34 for (int i = 0; i < sizeof(th) / sizeof(th[0]); i++)
35 pthread_create(newthread: &th[i], attr: 0, start_routine: thr1, arg: 0);
36 for (int i = 0; i < sizeof(th) / sizeof(th[0]); i++)
37 pthread_join(th: th[i], thread_return: 0);
38 return 0;
39}
40
41int main() {
42 struct sigaction act = {};
43 act.sa_handler = &handler;
44 if (sigaction(SIGPROF, act: &act, oact: 0)) {
45 perror(s: "sigaction");
46 exit(status: 1);
47 }
48
49 itimerval t;
50 t.it_value.tv_sec = 0;
51 t.it_value.tv_usec = 10;
52 t.it_interval = t.it_value;
53 if (setitimer(ITIMER_PROF, new: &t, old: 0)) {
54 perror(s: "setitimer");
55 exit(status: 1);
56 }
57
58 pthread_t th[100];
59 for (int i = 0; i < sizeof(th) / sizeof(th[0]); i++)
60 pthread_create(newthread: &th[i], attr: 0, start_routine: thr, arg: 0);
61 for (int i = 0; i < sizeof(th) / sizeof(th[0]); i++)
62 pthread_join(th: th[i], thread_return: 0);
63
64 fprintf(stderr, format: "DONE\n");
65 return 0;
66}
67
68// CHECK-NOT: WARNING: ThreadSanitizer:
69// CHECK: DONE
70// CHECK-NOT: WARNING: ThreadSanitizer:
71

source code of compiler-rt/test/tsan/signal_thread2.cpp