1 files changed, 36 insertions, 0 deletions
diff --git a/test/tsan/java_lock.cc b/test/tsan/java_lock.cc
new file mode 100644
index 000000000000..36a0f8b7bff3
--- /dev/null
+++ b/test/tsan/java_lock.cc
@@ -0,0 +1,36 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
+#include "java.h"
+#include <unistd.h>
+
+jptr varaddr;
+jptr lockaddr;
+
+void *Thread(void *p) {
+  sleep(1);
+  __tsan_java_mutex_lock(lockaddr);
+  *(int*)varaddr = 42;
+  __tsan_java_mutex_unlock(lockaddr);
+  return 0;
+}
+
+int main() {
+  int const kHeapSize = 1024 * 1024;
+  jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
+  __tsan_java_init(jheap, kHeapSize);
+  const int kBlockSize = 16;
+  __tsan_java_alloc(jheap, kBlockSize);
+  varaddr = jheap;
+  lockaddr = jheap + 8;
+  pthread_t th;
+  pthread_create(&th, 0, Thread, 0);
+  __tsan_java_mutex_lock(lockaddr);
+  *(int*)varaddr = 43;
+  __tsan_java_mutex_unlock(lockaddr);
+  pthread_join(th, 0);
+  __tsan_java_free(jheap, kBlockSize);
+  fprintf(stderr, "DONE\n");
+  return __tsan_java_fini();
+}
+
+// CHECK-NOT: WARNING: ThreadSanitizer: data race
+// CHECK: DONE