| // RUN: %clangxx_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| |
| int fd; |
| char buf; |
| |
| void *Thread1(void *x) { |
| buf = 1; |
| sleep(1); |
| return NULL; |
| } |
| |
| void *Thread2(void *x) { |
| write(fd, &buf, 1); |
| return NULL; |
| } |
| |
| int main() { |
| fd = open("/dev/null", O_WRONLY); |
| if (fd < 0) return 1; |
| pthread_t t[2]; |
| pthread_create(&t[0], NULL, Thread1, NULL); |
| sleep(1); |
| pthread_create(&t[1], NULL, Thread2, NULL); |
| pthread_join(t[0], NULL); |
| pthread_join(t[1], NULL); |
| close(fd); |
| } |
| |
| // CHECK: WARNING: ThreadSanitizer: data race |
| // CHECK: Read of size 1 |
| // CHECK: #0 write |
| // CHECK: Previous write of size 1 |
| // CHECK: #0 Thread1 |