1 // RUN: %clangxx_tsan -O1 %s -o %t && TSAN_OPTIONS="atexit_sleep_ms=50" %run %t 2>&1 | FileCheck %s 2 #include <stdlib.h> 3 #include <stdio.h> 4 #include <errno.h> 5 #include <pthread.h> 6 #include <unistd.h> 7 #include <sys/types.h> 8 #include <sys/wait.h> 9 10 int counter; 11 12 static void *incrementer(void *p) { 13 for (;;) 14 __sync_fetch_and_add(&counter, 1); 15 return 0; 16 } 17 18 static void *watchdog(void *p) { 19 sleep(100); 20 fprintf(stderr, "timed out after 100 seconds\n"); 21 exit(1); 22 return 0; 23 } 24 25 int main() { 26 pthread_t th1, th2; 27 pthread_create(&th1, 0, incrementer, 0); 28 pthread_create(&th2, 0, watchdog, 0); 29 for (int i = 0; i < 10; i++) { 30 switch (fork()) { 31 default: // parent 32 while (wait(0) < 0) {} 33 fprintf(stderr, "."); 34 break; 35 case 0: // child 36 __sync_fetch_and_add(&counter, 1); 37 exit(0); 38 break; 39 case -1: // error 40 fprintf(stderr, "failed to fork (%d)\n", errno); 41 exit(1); 42 } 43 } 44 fprintf(stderr, "OK\n"); 45 } 46 47 // CHECK: OK 48 49
