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
7 uint64_t objs[8*3*3*2][3];
8
9 extern "C" {
10 void __tsan_unaligned_read2(void *addr);
11 void __tsan_unaligned_read4(void *addr);
12 void __tsan_unaligned_read8(void *addr);
13 void __tsan_unaligned_write2(void *addr);
14 void __tsan_unaligned_write4(void *addr);
15 void __tsan_unaligned_write8(void *addr);
16 }
17
access(char * p,int sz,int rw)18 static void access(char *p, int sz, int rw) {
19 if (rw) {
20 switch (sz) {
21 case 0: __tsan_unaligned_write2(p); break;
22 case 1: __tsan_unaligned_write4(p); break;
23 case 2: __tsan_unaligned_write8(p); 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
accesssize(int sz)36 static 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
Test(bool main)45 void 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
Thread(void * p)69 void *Thread(void *p) {
70 (void)p;
71 Test(false);
72 return 0;
73 }
74
main()75 int main() {
76 pthread_t th;
77 pthread_create(&th, 0, Thread, 0);
78 Test(true);
79 pthread_join(th, 0);
80 fprintf(stderr, "OK\n");
81 }
82
83 // CHECK-NOT: WARNING: ThreadSanitizer:
84 // CHECK: OK
85