1 files changed, 3 insertions, 2 deletions
diff --git a/test/tsan/java_lock.cc b/test/tsan/java_lock.cc
index 36a0f8b7bff3..f1720529523c 100644
--- a/test/tsan/java_lock.cc
+++ b/test/tsan/java_lock.cc
@@ -1,12 +1,11 @@
 // 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);
+  barrier_wait(&barrier);
   __tsan_java_mutex_lock(lockaddr);
   *(int*)varaddr = 42;
   __tsan_java_mutex_unlock(lockaddr);
@@ -14,6 +13,7 @@ void *Thread(void *p) {
 }
 
 int main() {
+  barrier_init(&barrier, 2);
   int const kHeapSize = 1024 * 1024;
   jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
   __tsan_java_init(jheap, kHeapSize);
@@ -26,6 +26,7 @@ int main() {
   __tsan_java_mutex_lock(lockaddr);
   *(int*)varaddr = 43;
   __tsan_java_mutex_unlock(lockaddr);
+  barrier_wait(&barrier);
   pthread_join(th, 0);
   __tsan_java_free(jheap, kBlockSize);
   fprintf(stderr, "DONE\n");