1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include "java.h"
3 #include <memory.h>
4 
5 extern "C" __attribute__((disable_sanitizer_instrumentation)) bool
6 __tsan_symbolize_external(jptr pc, char *func_buf, jptr func_siz,
7                           char *file_buf, jptr file_siz, int *line, int *col) {
8   if (pc == (1234 | kExternalPCBit)) {
9     memcpy(func_buf, "MyFunc", sizeof("MyFunc"));
10     memcpy(file_buf, "MyFile.java", sizeof("MyFile.java"));
11     *line = 1234;
12     *col = 56;
13     return true;
14   }
15   return false;
16 }
17 
18 void *Thread(void *p) {
19   barrier_wait(&barrier);
20   __tsan_write1_pc((jptr)p, 1234 | kExternalPCBit);
21   return 0;
22 }
23 
24 int main() {
25   barrier_init(&barrier, 2);
26   int const kHeapSize = 1024 * 1024;
27   jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
28   __tsan_java_init(jheap, kHeapSize);
29   const int kBlockSize = 16;
30   __tsan_java_alloc(jheap, kBlockSize);
31   pthread_t th;
32   pthread_create(&th, 0, Thread, (void*)jheap);
33   __tsan_write1_pc((jptr)jheap, 1234 | kExternalPCBit);
34   barrier_wait(&barrier);
35   pthread_join(th, 0);
36   __tsan_java_free(jheap, kBlockSize);
37   fprintf(stderr, "DONE\n");
38   return __tsan_java_fini();
39 }
40 
41 // CHECK: WARNING: ThreadSanitizer: data race
42 // CHECK:     #0 MyFunc MyFile.java:1234:56
43 // CHECK: DONE
44