1// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2#include <pthread.h>
3#include <stdio.h>
4#include <stdlib.h>
5#include <stdint.h>
6
7uint64_t objs[8*3*3*2][3];
8
9extern "C" {
10uint16_t __tsan_unaligned_read2(void *addr);
11uint32_t __tsan_unaligned_read4(void *addr);
12uint64_t __tsan_unaligned_read8(void *addr);
13void __tsan_unaligned_write2(void *addr, uint16_t v);
14void __tsan_unaligned_write4(void *addr, uint32_t v);
15void __tsan_unaligned_write8(void *addr, uint64_t v);
16}
17
18static void access(char *p, int sz, int rw) {
19  if (rw) {
20    switch (sz) {
21    case 0: __tsan_unaligned_write2(p, 0); break;
22    case 1: __tsan_unaligned_write4(p, 0); break;
23    case 2: __tsan_unaligned_write8(p, 0); break;
24    default: exit(1);
25    }
26  } else {
27    switch (sz) {
28    case 0: __tsan_unaligned_read2(p); break;
29    case 1: __tsan_unaligned_read4(p); break;
30    case 2: __tsan_unaligned_read8(p); break;
31    default: exit(1);
32    }
33  }
34}
35
36static int accesssize(int sz) {
37  switch (sz) {
38  case 0: return 2;
39  case 1: return 4;
40  case 2: return 8;
41  }
42  exit(1);
43}
44
45void Test(bool main) {
46  uint64_t *obj = objs[0];
47  for (int off = 0; off < 8; off++) {
48    for (int sz1 = 0; sz1 < 3; sz1++) {
49      for (int sz2 = 0; sz2 < 3; sz2++) {
50        for (int rw = 0; rw < 2; rw++) {
51          char *p = (char*)obj + off;
52          if (main) {
53            // printf("thr=%d off=%d sz1=%d sz2=%d rw=%d p=%p\n",
54            //        main, off, sz1, sz2, rw, p);
55            access(p, sz1, true);
56          } else {
57            p += accesssize(sz1);
58            // printf("thr=%d off=%d sz1=%d sz2=%d rw=%d p=%p\n",
59            //        main, off, sz1, sz2, rw, p);
60            access(p, sz2, rw);
61          }
62          obj += 3;
63        }
64      }
65    }
66  }
67}
68
69void *Thread(void *p) {
70  (void)p;
71  Test(false);
72  return 0;
73}
74
75int main() {
76  pthread_t th;
77  pthread_create(&th, 0, Thread, 0);
78  Test(true);
79  pthread_join(th, 0);
80  printf("OK\n");
81}
82
83// CHECK-NOT: WARNING: ThreadSanitizer:
84// CHECK: OK
85