--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/gtest/utilities/test_globalCounter.cpp	Wed Apr 18 09:25:51 2018 +0200
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "precompiled.hpp"
+#include "runtime/atomic.hpp"
+#include "runtime/orderAccess.inline.hpp"
+#include "runtime/os.hpp"
+#include "utilities/globalCounter.hpp"
+#include "utilities/globalCounter.inline.hpp"
+#include "utilitiesHelper.inline.hpp"
+
+#define GOOD 1337
+#define BAD  4711
+
+struct TestData {
+  long test_value;
+};
+
+class RCUReaderThread : public JavaTestThread {
+public:
+  static volatile bool _exit;
+  volatile TestData** _test;
+  Semaphore* _wrt_start;
+  RCUReaderThread(Semaphore* post, volatile TestData** test, Semaphore* wrt_start)
+    : JavaTestThread(post), _test(test), _wrt_start(wrt_start) {};
+  virtual ~RCUReaderThread(){}
+  void main_run() {
+    _wrt_start->signal();
+    while (!_exit) {
+      GlobalCounter::critical_section_begin(this);
+      volatile TestData* test = OrderAccess::load_acquire(_test);
+      long value = OrderAccess::load_acquire(&test->test_value);
+      ASSERT_EQ(value, GOOD);
+      GlobalCounter::critical_section_end(this);
+      {
+        GlobalCounter::CriticalSection cs(this);
+        volatile TestData* test = OrderAccess::load_acquire(_test);
+        long value = OrderAccess::load_acquire(&test->test_value);
+        ASSERT_EQ(value, GOOD);
+      }
+    }
+  }
+};
+
+volatile bool RCUReaderThread::_exit = false;
+
+class RCUWriterThread : public JavaTestThread {
+public:
+  RCUWriterThread(Semaphore* post) : JavaTestThread(post) {
+  };
+  virtual ~RCUWriterThread(){}
+  void main_run() {
+    static const int NUMBER_OF_READERS = 4;
+    Semaphore post;
+    Semaphore wrt_start;
+    volatile TestData* test = NULL;
+
+    RCUReaderThread* reader1 = new RCUReaderThread(&post, &test, &wrt_start);
+    RCUReaderThread* reader2 = new RCUReaderThread(&post, &test, &wrt_start);
+    RCUReaderThread* reader3 = new RCUReaderThread(&post, &test, &wrt_start);
+    RCUReaderThread* reader4 = new RCUReaderThread(&post, &test, &wrt_start);
+
+    TestData* tmp = new TestData();
+    tmp->test_value = GOOD;
+    OrderAccess::release_store_fence(&test, tmp);
+
+    reader1->doit();
+    reader2->doit();
+    reader3->doit();
+    reader4->doit();
+
+    int nw = NUMBER_OF_READERS;
+    while (nw > 0) {
+      wrt_start.wait();
+      --nw;
+    }
+    jlong stop_ms = os::javaTimeMillis() + 1000; // 1 seconds max test time
+    for (int i = 0; i < 100000 && stop_ms > os::javaTimeMillis(); i++) {
+      volatile TestData* free_tmp = test;
+      tmp = new TestData();
+      tmp->test_value = GOOD;
+      OrderAccess::release_store(&test, tmp);
+      GlobalCounter::write_synchronize();
+      free_tmp->test_value = BAD;
+      delete free_tmp;
+    }
+    RCUReaderThread::_exit = true;
+    for (int i = 0; i < NUMBER_OF_READERS; i++) {
+      post.wait();
+    }
+  }
+};
+
+TEST_VM(GlobalCounter, critical_section) {
+  RCUReaderThread::_exit = false;
+  mt_test_doer<RCUWriterThread>();
+}