e54bd838f9
The former -XX:+TraceSafepoint flag is updated to the unified logging framework and is now replaced with -Xlog:safepoint in product mode. Reviewed-by: coleenp, hseigel
71 lines
2.3 KiB
Java
71 lines
2.3 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.lang.ref.WeakReference;
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public class SafepointTestMain {
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public static class B {
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static int count = 0;
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public static volatile boolean stop = false;
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static void localSleep(int time) {
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try{
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Thread.currentThread().sleep(time);
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} catch(InterruptedException ie) {
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}
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}
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public static void infinite() {
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while (!stop) { count++; }
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}
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}
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public static byte[] garbage;
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public static volatile WeakReference<Object> weakref;
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public static void createweakref() {
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Object o = new Object();
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weakref = new WeakReference<>(o);
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}
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public static void main(String[] args) throws Exception {
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// Run function in separate thread to force compilation and pint safepoint
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// message for compiled method
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new Thread() {
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public void run() {
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B.infinite();
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}
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}.start();
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B.localSleep(1000);
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// Cause several safepoints to run GC while the compiled method is running,
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// to see safepoint messages
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for (int i = 0; i < 2; i++) {
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createweakref();
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while(weakref.get() != null) {
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garbage = new byte[8192];
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System.gc();
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}
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}
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B.stop = true;
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}
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}
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