| // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s |
| #include <pthread.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| |
| int fds[2]; |
| int X; |
| |
| void *Thread1(void *x) { |
| X = 42; |
| write(fds[1], "a", 1); |
| return NULL; |
| } |
| |
| void *Thread2(void *x) { |
| char buf; |
| while (read(fds[0], &buf, 1) != 1) { |
| } |
| X = 43; |
| return NULL; |
| } |
| |
| int main() { |
| pipe(fds); |
| pthread_t t[2]; |
| pthread_create(&t[0], NULL, Thread1, NULL); |
| pthread_create(&t[1], NULL, Thread2, NULL); |
| pthread_join(t[0], NULL); |
| pthread_join(t[1], NULL); |
| fprintf(stderr, "OK\n"); |
| } |
| |
| // CHECK-NOT: WARNING: ThreadSanitizer: data race |