1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
2#include "java.h"
3
4jptr varaddr;
5jptr lockaddr;
6
7void *Thread(void *p) {
8 __tsan_java_mutex_lock(addr: lockaddr);
9 __tsan_java_mutex_lock(addr: lockaddr);
10 __tsan_java_mutex_lock(addr: lockaddr);
11 int rec = __tsan_java_mutex_unlock_rec(addr: lockaddr);
12 if (rec != 3) {
13 fprintf(stderr, format: "FAILED 0 rec=%d\n", rec);
14 exit(status: 1);
15 }
16 *(int*)varaddr = 42;
17 barrier_wait(barrier: &barrier);
18 barrier_wait(barrier: &barrier);
19 __tsan_java_mutex_lock_rec(addr: lockaddr, rec);
20 __tsan_java_mutex_unlock(addr: lockaddr);
21 __tsan_java_mutex_unlock(addr: lockaddr);
22 __tsan_java_mutex_unlock(addr: lockaddr);
23 return 0;
24}
25
26int main() {
27 barrier_init(barrier: &barrier, count: 2);
28 int const kHeapSize = 1024 * 1024;
29 jptr jheap = (jptr)malloc(size: kHeapSize + 8) + 8;
30 __tsan_java_init(heap_begin: jheap, heap_size: kHeapSize);
31 const int kBlockSize = 16;
32 __tsan_java_alloc(ptr: jheap, size: kBlockSize);
33 varaddr = jheap;
34 *(int*)varaddr = 0;
35 lockaddr = jheap + 8;
36 pthread_t th;
37 pthread_create(newthread: &th, attr: 0, start_routine: Thread, arg: 0);
38 barrier_wait(barrier: &barrier);
39 __tsan_java_mutex_lock(addr: lockaddr);
40 *(int*)varaddr = 43;
41 __tsan_java_mutex_unlock(addr: lockaddr);
42 barrier_wait(barrier: &barrier);
43 pthread_join(th: th, thread_return: 0);
44 __tsan_java_free(ptr: jheap, size: kBlockSize);
45 fprintf(stderr, format: "DONE\n");
46 return __tsan_java_fini();
47}
48
49// CHECK: WARNING: ThreadSanitizer: data race
50// CHECK-NOT: FAILED
51// CHECK: DONE
52

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