1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include "java.h"
3 #include <memory.h>
4
__tsan_symbolize_external_ex(jptr pc,void (* add_frame)(void *,const char *,const char *,int,int),void * ctx)5 extern "C" void __tsan_symbolize_external_ex(
6 jptr pc, void (*add_frame)(void *, const char *, const char *, int, int),
7 void *ctx) {
8 if (pc == (1234 | kExternalPCBit)) {
9 add_frame(ctx, "MyInnerFunc", "MyInnerFile.java", 1234, 56);
10 add_frame(ctx, "MyOuterFunc", "MyOuterFile.java", 4321, 65);
11 }
12 }
13
Thread(void * p)14 void *Thread(void *p) {
15 barrier_wait(&barrier);
16 __tsan_write1_pc((jptr)p, 1234 | kExternalPCBit);
17 return 0;
18 }
19
main()20 int main() {
21 barrier_init(&barrier, 2);
22 int const kHeapSize = 1024 * 1024;
23 jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
24 __tsan_java_init(jheap, kHeapSize);
25 const int kBlockSize = 16;
26 __tsan_java_alloc(jheap, kBlockSize);
27 pthread_t th;
28 pthread_create(&th, 0, Thread, (void*)jheap);
29 __tsan_write1_pc((jptr)jheap, 1234 | kExternalPCBit);
30 barrier_wait(&barrier);
31 pthread_join(th, 0);
32 __tsan_java_free(jheap, kBlockSize);
33 fprintf(stderr, "DONE\n");
34 return __tsan_java_fini();
35 }
36
37 // CHECK: WARNING: ThreadSanitizer: data race
38 // CHECK: #0 MyInnerFunc MyInnerFile.java:1234:56
39 // CHECK: #1 MyOuterFunc MyOuterFile.java:4321:65
40 // CHECK: DONE
41