| // RUN: %clangxx_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s |
| #include <pthread.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| int x[4], y[4], z[4]; |
| |
| void *MemCpyThread(void *a) { |
| memcpy((int*)a, z, 16); |
| return NULL; |
| } |
| |
| void *MemMoveThread(void *a) { |
| memmove((int*)a, z, 16); |
| return NULL; |
| } |
| |
| void *MemSetThread(void *a) { |
| sleep(1); |
| memset((int*)a, 0, 16); |
| return NULL; |
| } |
| |
| int main() { |
| pthread_t t[2]; |
| // Race on x between memcpy and memset |
| pthread_create(&t[0], NULL, MemCpyThread, x); |
| pthread_create(&t[1], NULL, MemSetThread, x); |
| pthread_join(t[0], NULL); |
| pthread_join(t[1], NULL); |
| // Race on y between memmove and memset |
| pthread_create(&t[0], NULL, MemMoveThread, y); |
| pthread_create(&t[1], NULL, MemSetThread, y); |
| pthread_join(t[0], NULL); |
| pthread_join(t[1], NULL); |
| |
| printf("PASS\n"); |
| return 0; |
| } |
| |
| // CHECK: WARNING: ThreadSanitizer: data race |
| // CHECK: #0 memset |
| // CHECK: #1 MemSetThread |
| // CHECK: Previous write |
| // CHECK: #0 memcpy |
| // CHECK: #1 MemCpyThread |
| |
| // CHECK: WARNING: ThreadSanitizer: data race |
| // CHECK: #0 memset |
| // CHECK: #1 MemSetThread |
| // CHECK: Previous write |
| // CHECK: #0 memmove |
| // CHECK: #1 MemMoveThread |