1 // RUN: %clangxx_tsan -O1 %s -o %t && %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 static void *racer(void *p) { 11 *(int*)p = 42; 12 return 0; 13 } 14 15 int main() { 16 switch (fork()) { 17 default: // parent 18 while (wait(0) < 0) {} 19 break; 20 case 0: // child 21 { 22 int x = 0; 23 pthread_t th1, th2; 24 pthread_create(&th1, 0, racer, &x); 25 pthread_create(&th2, 0, racer, &x); 26 pthread_join(th1, 0); 27 pthread_join(th2, 0); 28 exit(0); 29 break; 30 } 31 case -1: // error 32 fprintf(stderr, "failed to fork (%d)\n", errno); 33 exit(1); 34 } 35 fprintf(stderr, "OK\n"); 36 } 37 38 // CHECK: ThreadSanitizer: data race 39 // CHECK: OK 40 41
