1 // RUN: %clangxx_tsan -O1 %s -o %T/simple_stack2.cc.exe && %deflake %run %T/simple_stack2.cc.exe | FileCheck %s
2 #include "test.h"
3 
4 int Global;
5 
foo1()6 void __attribute__((noinline)) foo1() {
7   Global = 42;
8 }
9 
bar1()10 void __attribute__((noinline)) bar1() {
11   volatile int tmp = 42;
12   int tmp2 = tmp;
13   (void)tmp2;
14   foo1();
15 }
16 
foo2()17 void __attribute__((noinline)) foo2() {
18   volatile int tmp = Global;
19   int tmp2 = tmp;
20   (void)tmp2;
21 }
22 
bar2()23 void __attribute__((noinline)) bar2() {
24   volatile int tmp = 42;
25   int tmp2 = tmp;
26   (void)tmp2;
27   foo2();
28 }
29 
Thread1(void * x)30 void *Thread1(void *x) {
31   barrier_wait(&barrier);
32   bar1();
33   return NULL;
34 }
35 
main()36 int main() {
37   barrier_init(&barrier, 2);
38   pthread_t t;
39   pthread_create(&t, NULL, Thread1, NULL);
40   bar2();
41   barrier_wait(&barrier);
42   pthread_join(t, NULL);
43 }
44 
45 // CHECK:      WARNING: ThreadSanitizer: data race
46 // CHECK-NEXT:   Write of size 4 at {{.*}} by thread T1:
47 // CHECK-NEXT:     #0 foo1{{.*}} {{.*}}simple_stack2.cc:7{{(:10)?}} (simple_stack2.cc.exe+{{.*}})
48 // CHECK-NEXT:     #1 bar1{{.*}} {{.*}}simple_stack2.cc:14{{(:3)?}} (simple_stack2.cc.exe+{{.*}})
49 // CHECK-NEXT:     #2 Thread1{{.*}} {{.*}}simple_stack2.cc:32{{(:3)?}} (simple_stack2.cc.exe+{{.*}})
50 // CHECK:        Previous read of size 4 at {{.*}} by main thread:
51 // CHECK-NEXT:     #0 foo2{{.*}} {{.*}}simple_stack2.cc:18{{(:22)?}} (simple_stack2.cc.exe+{{.*}})
52 // CHECK-NEXT:     #1 bar2{{.*}} {{.*}}simple_stack2.cc:27{{(:3)?}} (simple_stack2.cc.exe+{{.*}})
53 // CHECK-NEXT:     #2 main{{.*}} {{.*}}simple_stack2.cc:40{{(:3)?}} (simple_stack2.cc.exe+{{.*}})
54