llvm-project

1
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2
// This test fails on powerpc64 big endian.
3
// The Tsan report is returning wrong information about
4
// the location of the race.
5
// XFAIL: target=powerpc64-unknown-linux-gnu{{.*}}
6

7
#include "test.h"
8

9
typedef unsigned long uptr;
10
extern "C" void __tsan_read_range_pc(uptr addr, uptr size, uptr pc);
11
extern "C" void __tsan_write_range_pc(uptr addr, uptr size, uptr pc);
12

13
void foobar() {
14
}
15

16
void barbaz() {
17
}
18

19
void *Thread(void *p) {
20
  barrier_wait(&barrier);
21
  __tsan_read_range_pc((uptr)p, 32, (uptr)foobar + kPCInc);
22
  return 0;
23
}
24

25
int main() {
26
  barrier_init(&barrier, 2);
27
  int a[128];
28
  pthread_t th;
29
  pthread_create(&th, 0, Thread, (void*)a);
30
  __tsan_write_range_pc((uptr)(a+2), 32, (uptr)barbaz + kPCInc);
31
  barrier_wait(&barrier);
32
  pthread_join(th, 0);
33
  fprintf(stderr, "DONE\n");
34
  return 0;
35
}
36

37
// CHECK: WARNING: ThreadSanitizer: data race
38
// CHECK:     #0 foobar
39
// CHECK:     #0 barbaz
40
// CHECK: DONE
41