46 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#include <errno.h>7 8int fd;9char buf;10 11void *Thread1(void *x) {12 barrier_wait(&barrier);13 read(fd, &buf, 1);14 return NULL;15}16 17void *Thread2(void *x) {18 read(fd, &buf, 1);19 barrier_wait(&barrier);20 return NULL;21}22 23int main() {24 barrier_init(&barrier, 2);25 fd = open("/dev/random", O_RDONLY);26 if (fd < 0) {27 fprintf(stderr, "failed to open /dev/random (%d)\n", errno);28 return 1;29 }30 pthread_t t[2];31 pthread_create(&t[0], NULL, Thread1, NULL);32 pthread_create(&t[1], NULL, Thread2, NULL);33 pthread_join(t[0], NULL);34 pthread_join(t[1], NULL);35 close(fd);36 fprintf(stderr, "DONE\n");37}38 39// CHECK: WARNING: ThreadSanitizer: data race40// CHECK: Write of size 141// CHECK: #0 read42// CHECK: Previous write of size 143// CHECK: #0 read44// CHECK: DONE45 46