xref: /llvm-project/compiler-rt/test/tsan/deep_stack2.cpp (revision dcc6db22d8508a85ecd2b8bdcc5ae5646968c083) 
1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include "test.h"
3 
4 volatile long X;
5 volatile long Y;
6 volatile int N1 = 2 << 10;
7 volatile int N2 = 32 << 10;
8 void (*volatile F)();
9 void (*volatile G)();
10 
foo()11 static void foo() {
12   if (--N1)
13     return F();
14   while (--N2)
15     G();
16 }
17 
bar()18 static void bar() { Y++; }
19 
Thread(void * p)20 void *Thread(void *p) {
21   F();
22   X = 43;
23   barrier_wait(&barrier);
24   return 0;
25 }
26 
main()27 int main() {
28   barrier_init(&barrier, 2);
29   F = foo;
30   G = bar;
31   pthread_t t;
32   pthread_create(&t, 0, Thread, 0);
33   barrier_wait(&barrier);
34   X = 43;
35   pthread_join(t, 0);
36 }
37 
38 // CHECK: WARNING: ThreadSanitizer: data race
39 // CHECK:   Write
40 // CHECK:     #0 main
41 // CHECK:   Previous write
42 // CHECK:     #0 Thread
43