inlined_memcpy_race2.cc revision 6a211c5814e25d6745a5058cc0e499e5235d3821 
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
8int y[4], z[4];
9
10void *MemMoveThread(void *a) {
11  memmove((int*)a, z, 16);
12  return NULL;
13}
14
15void *MemSetThread(void *a) {
16  sleep(1);
17  memset((int*)a, 0, 16);
18  return NULL;
19}
20
21int main() {
22  pthread_t t[2];
23  // Race on y between memmove and memset
24  pthread_create(&t[0], NULL, MemMoveThread, y);
25  pthread_create(&t[1], NULL, MemSetThread, y);
26  pthread_join(t[0], NULL);
27  pthread_join(t[1], NULL);
28
29  printf("PASS\n");
30  return 0;
31}
32
33// CHECK: WARNING: ThreadSanitizer: data race
34// CHECK:   #0 memset
35// CHECK:   #1 MemSetThread
36// CHECK:  Previous write
37// CHECK:   #0 memmove
38// CHECK:   #1 MemMoveThread
39