--- /dev/null	2019-01-28 17:48:17.000000000 +0800
+++ new/src/share/vm/jfr/utilities/jfrSpinlockHelper.hpp	2019-01-28 17:48:16.000000000 +0800
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2013, 2019, 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.
+ *
+ */
+
+#ifndef SHARE_VM_JFR_UTILITIES_JFRSPINLOCKHELPER_HPP
+#define SHARE_VM_JFR_UTILITIES_JFRSPINLOCKHELPER_HPP
+
+#include "runtime/thread.hpp"
+
+// this utility could be useful for non cx8 platforms
+
+class JfrSpinlockHelper {
+ private:
+  volatile int* const _lock;
+
+ public:
+  JfrSpinlockHelper(volatile int* lock) : _lock(lock) {
+    Thread::SpinAcquire(_lock, NULL);
+  }
+
+  JfrSpinlockHelper(volatile int* const lock, const char* name) : _lock(lock) {
+    Thread::SpinAcquire(_lock, name);
+  }
+
+  ~JfrSpinlockHelper() {
+    Thread::SpinRelease(_lock);
+  }
+};
+
+#endif // SHARE_VM_JFR_UTILITIES_JFRSPINLOCKHELPER_HPP