forked from OSchip/llvm-project
43 lines
1013 B
C++
43 lines
1013 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
|
|
#include <pthread.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
char *data = new char[10];
|
|
char *data1 = new char[10];
|
|
char *data2 = new char[10];
|
|
|
|
void *Thread1(void *x) {
|
|
static volatile int size = 1;
|
|
memcpy(data+5, data1, size);
|
|
return NULL;
|
|
}
|
|
|
|
void *Thread2(void *x) {
|
|
static volatile int size = 4;
|
|
sleep(1);
|
|
memcpy(data+3, data2, size);
|
|
return NULL;
|
|
}
|
|
|
|
int main() {
|
|
fprintf(stderr, "addr=%p\n", &data[5]);
|
|
pthread_t t[2];
|
|
pthread_create(&t[0], NULL, Thread1, NULL);
|
|
pthread_create(&t[1], NULL, Thread2, NULL);
|
|
pthread_join(t[0], NULL);
|
|
pthread_join(t[1], NULL);
|
|
return 0;
|
|
}
|
|
|
|
// CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
|
|
// CHECK: WARNING: ThreadSanitizer: data race
|
|
// CHECK: Write of size 1 at [[ADDR]] by thread T2:
|
|
// CHECK: #0 memcpy
|
|
// CHECK: #1 Thread2
|
|
// CHECK: Previous write of size 1 at [[ADDR]] by thread T1:
|
|
// CHECK: #0 memcpy
|
|
// CHECK: #1 Thread1
|