42 lines · cpp
1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s2#include "test.h"3#include <sys/types.h>4#include <sys/stat.h>5#include <fcntl.h>6 7int X;8 9void *Thread1(void *x) {10 barrier_wait(&barrier);11 int f = open("/dev/random", O_RDONLY);12 char buf;13 read(f, &buf, 1);14 close(f);15 X = 42;16 return NULL;17}18 19void *Thread2(void *x) {20 X = 43;21 write(STDOUT_FILENO, "a", 1);22 barrier_wait(&barrier);23 return NULL;24}25 26int main() {27 barrier_init(&barrier, 2);28 pthread_t t[2];29 pthread_create(&t[0], NULL, Thread1, NULL);30 pthread_create(&t[1], NULL, Thread2, NULL);31 pthread_join(t[0], NULL);32 pthread_join(t[1], NULL);33}34 35// CHECK: WARNING: ThreadSanitizer: data race36// CHECK: Write of size 437// CHECK: #0 Thread138// CHECK: Previous write of size 439// CHECK: #0 Thread240 41 42