1// RUN: %clangxx_tsan -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
2#include "test.h"
3
4int Global;
5volatile int x;
6const int kSize = 64 << 10;
7volatile long data[kSize];
8
9void __attribute__((noinline)) foo() {
10 for (int i = 0; i < kSize; i++)
11 data[i]++;
12}
13
14void *Thread(void *a) {
15 __atomic_store_n(&x, 1, __ATOMIC_RELEASE);
16 foo();
17 data[0]++;
18 if (a != 0)
19 barrier_wait(&barrier);
20 return 0;
21}
22
23int main() {
24 barrier_init(&barrier, 2);
25 for (int i = 0; i < 50; i++) {
26 pthread_t t;
27 pthread_create(&t, 0, Thread, 0);
28 pthread_join(t, 0);
29 }
30 pthread_t t;
31 pthread_create(&t, 0, Thread, (void*)1);
32 barrier_wait(&barrier);
33 for (int i = 0; i < kSize; i++)
34 data[i]++;
35 pthread_join(t, 0);
36 fprintf(stderr, "DONE\n");
37 return 0;
38}
39
40// Previously this test produced bogus stack traces like:
41// Previous write of size 8 at 0x0000006a8ff8 by thread T17:
42// #0 foo() restore_stack.cpp:13:5 (restore_stack.cpp.exe+0x00000040622c)
43// #1 Thread(void*) restore_stack.cpp:18:3 (restore_stack.cpp.exe+0x000000406283)
44// #2 __tsan_thread_start_func rtl/tsan_interceptors.cpp:886 (restore_stack.cpp.exe+0x00000040a749)
45// #3 Thread(void*) restore_stack.cpp:18:3 (restore_stack.cpp.exe+0x000000406283)
46
47// CHECK: WARNING: ThreadSanitizer: data race
48// CHECK-NOT: __tsan_thread_start_func
49// CHECK-NOT: #3 Thread
50// CHECK: DONE
51