1 // RUN: %clangxx_tsan %s -o %t
2 // RUN: %deflake %run %t 2>&1 | FileCheck %s
3
4 #include <thread>
5
6 #import "../test.h"
7
8
9 extern "C" {
10 int __tsan_get_report_data(void *report, const char **description, int *count,
11 int *stack_count, int *mop_count, int *loc_count,
12 int *mutex_count, int *thread_count,
13 int *unique_tid_count, void **sleep_trace,
14 unsigned long trace_size);
15 int __tsan_get_report_tag(void *report, unsigned long *tag);
16 }
17
18 __attribute__((no_sanitize("thread"), noinline))
ExternalWrite(void * addr)19 void ExternalWrite(void *addr) {
20 void *kSwiftAccessRaceTag = (void *)0x1;
21 __tsan_external_write(addr, nullptr, kSwiftAccessRaceTag);
22 }
23
main(int argc,char * argv[])24 int main(int argc, char *argv[]) {
25 barrier_init(&barrier, 2);
26 fprintf(stderr, "Start.\n");
27 // CHECK: Start.
28
29 void *opaque_object = malloc(16);
30 std::thread t1([opaque_object] {
31 ExternalWrite(opaque_object);
32 barrier_wait(&barrier);
33 });
34 std::thread t2([opaque_object] {
35 barrier_wait(&barrier);
36 ExternalWrite(opaque_object);
37 });
38 // CHECK: WARNING: ThreadSanitizer: Swift access race
39 // CHECK: Modifying access of Swift variable at {{.*}} by thread {{.*}}
40 // CHECK: Previous modifying access of Swift variable at {{.*}} by thread {{.*}}
41 // CHECK: SUMMARY: ThreadSanitizer: Swift access race
42 t1.join();
43 t2.join();
44
45 fprintf(stderr, "Done.\n");
46 }
47
48 extern "C"
__tsan_on_report(void * report)49 void __tsan_on_report(void *report) {
50 const char *description;
51 int count;
52 int stack_count, mop_count, loc_count, mutex_count, thread_count,
53 unique_tid_count;
54 void *sleep_trace[16] = {0};
55 __tsan_get_report_data(report, &description, &count, &stack_count, &mop_count,
56 &loc_count, &mutex_count, &thread_count,
57 &unique_tid_count, sleep_trace, 16);
58 fprintf(stderr, "report type = '%s', count = %d\n", description, count);
59 // CHECK: report type = 'external-race', count = 0
60
61 unsigned long tag;
62 __tsan_get_report_tag(report, &tag);
63 fprintf(stderr, "tag = %ld\n", tag);
64 // CHECK: tag = 1
65 }
66
67 // CHECK: Done.
68 // CHECK: ThreadSanitizer: reported 1 warnings
69