69 lines
2.5 KiB
Java
69 lines
2.5 KiB
Java
/*
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* Copyright (c) 2015, 2023, 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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/*
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* @test
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* @bug 8140348
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* @summary safepoint=trace should have output from each log statement in the code
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* @requires vm.flagless
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* java.management
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* @run driver SafepointTest
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*/
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import java.lang.ref.WeakReference;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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public class SafepointTest {
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public static void main(String[] args) throws Exception {
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder("-Xlog:safepoint=trace",
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InnerClass.class.getName());
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.shouldContain("Safepoint synchronization initiated");
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output.shouldHaveExitValue(0);
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}
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public static class InnerClass {
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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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// Cause several safepoints to run GC 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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}
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}
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}
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