forked from OSchip/llvm-project
56 lines
1.0 KiB
C++
56 lines
1.0 KiB
C++
// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
|
|
#include "test.h"
|
|
#include <signal.h>
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <errno.h>
|
|
|
|
volatile int X;
|
|
|
|
static void handler(int sig) {
|
|
(void)sig;
|
|
if (X != 42)
|
|
printf("bad");
|
|
}
|
|
|
|
static void* thr(void *p) {
|
|
for (int i = 0; i != 1000; i++)
|
|
usleep(1000); // process signals
|
|
return 0;
|
|
}
|
|
|
|
int main() {
|
|
const int kThreads = 10;
|
|
pthread_t th[kThreads];
|
|
for (int i = 0; i < kThreads; i++)
|
|
pthread_create(&th[i], 0, thr, 0);
|
|
|
|
X = 42;
|
|
|
|
struct sigaction act = {};
|
|
act.sa_handler = &handler;
|
|
if (sigaction(SIGPROF, &act, 0)) {
|
|
perror("sigaction");
|
|
exit(1);
|
|
}
|
|
|
|
itimerval t;
|
|
t.it_value.tv_sec = 0;
|
|
t.it_value.tv_usec = 10;
|
|
t.it_interval = t.it_value;
|
|
if (setitimer(ITIMER_PROF, &t, 0)) {
|
|
perror("setitimer");
|
|
exit(1);
|
|
}
|
|
|
|
for (int i = 0; i < kThreads; i++)
|
|
pthread_join(th[i], 0);
|
|
|
|
fprintf(stderr, "DONE\n");
|
|
return 0;
|
|
}
|
|
|
|
// CHECK-NOT: WARNING: ThreadSanitizer:
|
|
// CHECK: DONE
|
|
// CHECK-NOT: WARNING: ThreadSanitizer:
|