1 // RUN: %clangxx_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s 2 #include <pthread.h> 3 #include <stdio.h> 4 #include <unistd.h> 5 #include <sys/types.h> 6 #include <sys/stat.h> 7 #include <fcntl.h> 8 9 int fd; 10 char buf; 11 12 void *Thread1(void *x) { 13 buf = 1; 14 sleep(1); 15 return NULL; 16 } 17 18 void *Thread2(void *x) { 19 write(fd, &buf, 1); 20 return NULL; 21 } 22 23 int main() { 24 fd = open("/dev/null", O_WRONLY); 25 if (fd < 0) return 1; 26 pthread_t t[2]; 27 pthread_create(&t[0], NULL, Thread1, NULL); 28 sleep(1); 29 pthread_create(&t[1], NULL, Thread2, NULL); 30 pthread_join(t[0], NULL); 31 pthread_join(t[1], NULL); 32 close(fd); 33 } 34 35 // CHECK: WARNING: ThreadSanitizer: data race 36 // CHECK: Read of size 1 37 // CHECK: #0 write 38 // CHECK: Previous write of size 1 39 // CHECK: #0 Thread1 40
