forked from OSchip/llvm-project
38 lines
820 B
C++
38 lines
820 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
|
|
#include "test.h"
|
|
#include <string.h>
|
|
|
|
int y[4], z[4];
|
|
|
|
void *MemMoveThread(void *a) {
|
|
memmove((int*)a, z, 16);
|
|
barrier_wait(&barrier);
|
|
return NULL;
|
|
}
|
|
|
|
void *MemSetThread(void *a) {
|
|
barrier_wait(&barrier);
|
|
memset((int*)a, 0, 16);
|
|
return NULL;
|
|
}
|
|
|
|
int main() {
|
|
barrier_init(&barrier, 2);
|
|
pthread_t t[2];
|
|
// 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);
|
|
|
|
fprintf(stderr, "PASS\n");
|
|
return 0;
|
|
}
|
|
|
|
// CHECK: WARNING: ThreadSanitizer: data race
|
|
// CHECK: #0 memset
|
|
// CHECK: #1 MemSetThread
|
|
// CHECK: Previous write
|
|
// CHECK: #0 {{(memcpy|memmove)}}
|
|
// CHECK: #1 MemMoveThread
|