1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2#include "java.h"
3#include <memory.h>
4#include <sanitizer/tsan_interface.h>
5
6#if (__APPLE__)
7__attribute__((weak)) // Required for dyld macOS 12.0+
8#endif
9__attribute__((disable_sanitizer_instrumentation))
10extern "C" bool
11__tsan_symbolize_external(jptr pc, char *func_buf, jptr func_siz,
12 char *file_buf, jptr file_siz, int *line, int *col) {
13 if (pc == (1234 | kExternalPCBit)) {
14 memcpy(dest: func_buf, src: "MyFunc", n: sizeof("MyFunc"));
15 memcpy(dest: file_buf, src: "MyFile.java", n: sizeof("MyFile.java"));
16 *line = 1234;
17 *col = 56;
18 return true;
19 }
20 return false;
21}
22
23void *Thread(void *p) {
24 barrier_wait(barrier: &barrier);
25 __tsan_write1_pc(addr: (jptr)p, pc: 1234 | kExternalPCBit);
26 return 0;
27}
28
29int main() {
30 barrier_init(barrier: &barrier, count: 2);
31 int const kHeapSize = 1024 * 1024;
32 jptr jheap = (jptr)malloc(size: kHeapSize + 8) + 8;
33 __tsan_java_init(heap_begin: jheap, heap_size: kHeapSize);
34 const int kBlockSize = 16;
35 __tsan_java_alloc(ptr: jheap, size: kBlockSize);
36 pthread_t th;
37 pthread_create(newthread: &th, attr: 0, start_routine: Thread, arg: (void*)jheap);
38 __tsan_write1_pc(addr: (jptr)jheap, pc: 1234 | kExternalPCBit);
39 barrier_wait(barrier: &barrier);
40 pthread_join(th: th, thread_return: 0);
41 __tsan_java_free(ptr: jheap, size: kBlockSize);
42 fprintf(stderr, format: "DONE\n");
43 return __tsan_java_fini();
44}
45
46// CHECK: WARNING: ThreadSanitizer: data race
47// CHECK: #0 MyFunc MyFile.java:1234:56
48// CHECK: DONE
49

source code of compiler-rt/test/tsan/java_symbolization_legacy.cpp