1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2#include <pthread.h>
3#include <stddef.h>
4#include <stdio.h>
5#include <string.h>
6#include <unistd.h>
7
8char *data = new char[10];
9char *data1 = new char[10];
10char *data2 = new char[10];
11
12void *Thread1(void *x) {
13  static volatile int size = 1;
14  memcpy(data+5, data1, size);
15  return NULL;
16}
17
18void *Thread2(void *x) {
19  static volatile int size = 4;
20  sleep(1);
21  memcpy(data+3, data2, size);
22  return NULL;
23}
24
25int main() {
26  fprintf(stderr, "addr=%p\n", &data[5]);
27  pthread_t t[2];
28  pthread_create(&t[0], NULL, Thread1, NULL);
29  pthread_create(&t[1], NULL, Thread2, NULL);
30  pthread_join(t[0], NULL);
31  pthread_join(t[1], NULL);
32  return 0;
33}
34
35// CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
36// CHECK: WARNING: ThreadSanitizer: data race
37// CHECK:   Write of size 1 at [[ADDR]] by thread T2:
38// CHECK:     #0 memcpy
39// CHECK:     #1 Thread2
40// CHECK:   Previous write of size 1 at [[ADDR]] by thread T1:
41// CHECK:     #0 memcpy
42// CHECK:     #1 Thread1
43