43 lines · cpp
1// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s2#include "java.h"3 4jptr varaddr;5jptr lockaddr;6 7void *Thread(void *p) {8 while (__atomic_load_n((int*)lockaddr, __ATOMIC_RELAXED) == 0)9 usleep(1000); // spin-wait10 __tsan_java_acquire(lockaddr);11 *(int*)varaddr = 42;12 return 0;13}14 15int main() {16 barrier_init(&barrier, 2);17 int const kHeapSize = 1024 * 1024;18 jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;19 __tsan_java_init(jheap, kHeapSize);20 const int kBlockSize = 16;21 __tsan_java_alloc(jheap, kBlockSize);22 varaddr = jheap;23 lockaddr = jheap + 8;24 pthread_t th;25 pthread_create(&th, 0, Thread, 0);26 *(int*)varaddr = 43;27 __tsan_java_release(lockaddr);28 __atomic_store_n((int*)lockaddr, 1, __ATOMIC_RELAXED);29 pthread_join(th, 0);30 *(int*)lockaddr = 0;31 pthread_create(&th, 0, Thread, 0);32 *(int*)varaddr = 43;33 __tsan_java_release_store(lockaddr);34 __atomic_store_n((int*)lockaddr, 1, __ATOMIC_RELAXED);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-NOT: WARNING: ThreadSanitizer: data race42// CHECK: DONE43