57 lines · cpp
1// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s2// UNSUPPORTED: darwin3#include "test.h"4#include <signal.h>5#include <sys/types.h>6#include <sys/time.h>7#include <errno.h>8 9volatile int X;10 11static void handler(int sig) {12 (void)sig;13 if (X != 42)14 printf("bad");15}16 17static void* thr(void *p) {18 for (int i = 0; i != 1000; i++)19 usleep(1000); // process signals20 return 0;21}22 23int main() {24 const int kThreads = 10;25 pthread_t th[kThreads];26 for (int i = 0; i < kThreads; i++)27 pthread_create(&th[i], 0, thr, 0);28 29 X = 42;30 31 struct sigaction act = {};32 act.sa_handler = &handler;33 if (sigaction(SIGPROF, &act, 0)) {34 perror("sigaction");35 exit(1);36 }37 38 itimerval t;39 t.it_value.tv_sec = 0;40 t.it_value.tv_usec = 10;41 t.it_interval = t.it_value;42 if (setitimer(ITIMER_PROF, &t, 0)) {43 perror("setitimer");44 exit(1);45 }46 47 for (int i = 0; i < kThreads; i++)48 pthread_join(th[i], 0);49 50 fprintf(stderr, "DONE\n");51 return 0;52}53 54// CHECK-NOT: WARNING: ThreadSanitizer:55// CHECK: DONE56// CHECK-NOT: WARNING: ThreadSanitizer:57