1*7c3d14c8STreehugger Robot // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2*7c3d14c8STreehugger Robot #include "java.h"
3*7c3d14c8STreehugger Robot
4*7c3d14c8STreehugger Robot jptr varaddr;
5*7c3d14c8STreehugger Robot jptr lockaddr;
6*7c3d14c8STreehugger Robot
Thread(void * p)7*7c3d14c8STreehugger Robot void *Thread(void *p) {
8*7c3d14c8STreehugger Robot while (__atomic_load_n((int*)lockaddr, __ATOMIC_RELAXED) == 0)
9*7c3d14c8STreehugger Robot usleep(1000); // spin-wait
10*7c3d14c8STreehugger Robot __tsan_java_acquire(lockaddr);
11*7c3d14c8STreehugger Robot *(int*)varaddr = 42;
12*7c3d14c8STreehugger Robot return 0;
13*7c3d14c8STreehugger Robot }
14*7c3d14c8STreehugger Robot
main()15*7c3d14c8STreehugger Robot int main() {
16*7c3d14c8STreehugger Robot barrier_init(&barrier, 2);
17*7c3d14c8STreehugger Robot int const kHeapSize = 1024 * 1024;
18*7c3d14c8STreehugger Robot jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
19*7c3d14c8STreehugger Robot __tsan_java_init(jheap, kHeapSize);
20*7c3d14c8STreehugger Robot const int kBlockSize = 16;
21*7c3d14c8STreehugger Robot __tsan_java_alloc(jheap, kBlockSize);
22*7c3d14c8STreehugger Robot varaddr = jheap;
23*7c3d14c8STreehugger Robot lockaddr = jheap + 8;
24*7c3d14c8STreehugger Robot pthread_t th;
25*7c3d14c8STreehugger Robot pthread_create(&th, 0, Thread, 0);
26*7c3d14c8STreehugger Robot *(int*)varaddr = 43;
27*7c3d14c8STreehugger Robot __tsan_java_release(lockaddr);
28*7c3d14c8STreehugger Robot __atomic_store_n((int*)lockaddr, 1, __ATOMIC_RELAXED);
29*7c3d14c8STreehugger Robot pthread_join(th, 0);
30*7c3d14c8STreehugger Robot *(int*)lockaddr = 0;
31*7c3d14c8STreehugger Robot pthread_create(&th, 0, Thread, 0);
32*7c3d14c8STreehugger Robot *(int*)varaddr = 43;
33*7c3d14c8STreehugger Robot __tsan_java_release_store(lockaddr);
34*7c3d14c8STreehugger Robot __atomic_store_n((int*)lockaddr, 1, __ATOMIC_RELAXED);
35*7c3d14c8STreehugger Robot pthread_join(th, 0);
36*7c3d14c8STreehugger Robot __tsan_java_free(jheap, kBlockSize);
37*7c3d14c8STreehugger Robot fprintf(stderr, "DONE\n");
38*7c3d14c8STreehugger Robot return __tsan_java_fini();
39*7c3d14c8STreehugger Robot }
40*7c3d14c8STreehugger Robot
41*7c3d14c8STreehugger Robot // CHECK-NOT: WARNING: ThreadSanitizer: data race
42*7c3d14c8STreehugger Robot // CHECK: DONE
43