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
__tsan_symbolize_external(jptr pc,char * func_buf,jptr func_siz,char * file_buf,jptr file_siz,int * line,int * col)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
Thread(void * p)18 void *Thread(void *p) {
19 barrier_wait(&barrier);
20 __tsan_write1_pc((jptr)p, 1234 | kExternalPCBit);
21 return 0;
22 }
23
main()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