1 // RUN: %clangxx_tsan -O1 %s -o %t
2 // RUN: %deflake %run %t 2>&1 | FileCheck %s
3 
4 #include <pthread.h>
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <string.h>
8 
9 #include "../test.h"
10 
11 extern "C" {
12 void __tsan_on_report(void *report);
13 int __tsan_get_report_loc(void *report, unsigned long idx, const char **type,
14                           void **addr, void **start,
15                           unsigned long *size, int *tid, int *fd,
16                           int *suppressable, void **trace,
17                           unsigned long trace_size);
18 int __tsan_get_report_loc_object_type(void *report, unsigned long idx,
19                                       const char **object_type);
20 }
21 
22 void *Thread(void *arg) {
23   barrier_wait(&barrier);
24   *((long *)arg) = 42;
25   return NULL;
26 }
27 
28 int main() {
29   barrier_init(&barrier, 2);
30   void *tag = __tsan_external_register_tag("MyObject");
31   long *obj = (long *)malloc(sizeof(long));
32   fprintf(stderr, "obj = %p\n", obj);
33   // CHECK: obj = [[ADDR:0x[0-9a-f]+]]
34   __tsan_external_assign_tag(obj, tag);
35 
36   pthread_t t;
37   pthread_create(&t, 0, Thread, obj);
38   *obj = 41;
39   barrier_wait(&barrier);
40   pthread_join(t, 0);
41   fprintf(stderr, "Done.\n");
42   return 0;
43 }
44 
45 __attribute__((disable_sanitizer_instrumentation)) void
46 __tsan_on_report(void *report) {
47   const char *type;
48   void *addr;
49   void *start;
50   unsigned long size;
51   int tid, fd, suppressable;
52   void *trace[16] = {0};
53   __tsan_get_report_loc(report, 0, &type, &addr, &start, &size, &tid, &fd,
54                         &suppressable, trace, 16);
55   fprintf(stderr, "type = %s, start = %p, size = %ld\n", type, start, size);
56   // CHECK: type = heap, start = [[ADDR]], size = 8
57 
58   const char *object_type;
59   __tsan_get_report_loc_object_type(report, 0, &object_type);
60   fprintf(stderr, "object_type = %s\n", object_type);
61   // CHECK: object_type = MyObject
62 }
63 
64 // CHECK: Done.
65 // CHECK: ThreadSanitizer: reported 1 warnings
66