114 lines
5.4 KiB
Java
114 lines
5.4 KiB
Java
/*
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* Copyright (c) 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 8306929
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* @summary Verify clean_previous_versions when run with JFR and CDS
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* @requires vm.jvmti
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* @requires vm.cds
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* @requires vm.hasJFR
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* @requires vm.opt.final.ClassUnloading
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* @requires vm.flagless
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* @library /test/lib
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* @run driver RedefineSharedClassJFR xshare-off
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* @run driver RedefineSharedClassJFR xshare-on
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*/
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import java.util.ArrayList;
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import java.util.List;
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import jdk.test.lib.Platform;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import jtreg.SkippedException;
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public class RedefineSharedClassJFR {
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private static final String SHOULD_CLEAN_TRUE = "Class unloading: should_clean_previous_versions = true";
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private static final String SHOULD_CLEAN_FALSE = "Class unloading: should_clean_previous_versions = false";
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private static final String SCRATCH_CLASS_ADDED_SHARED = "scratch class added; class is shared";
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private static final String SCRATCH_CLASS_ADDED_ON_STACK = "scratch class added; one of its methods is on_stack.";
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public static void main(String[] args) throws Exception {
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// Skip test if default archive is supported.
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if (!Platform.isDefaultCDSArchiveSupported()) {
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throw new SkippedException("Supported platform");
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}
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// Test is run with JFR which will transform a number of classes. Depending
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// on if the test is run with or without CDS the output will be different,
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// due to the fact that shared classes can never be cleaned out after retranform.
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if (args.length > 0) {
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// When run with an argument the class is used as driver and should parse
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// the output to verify it is correct given the command line.
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List<String> baseCommand = List.of(
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"-XX:StartFlightRecording",
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"-Xlog:redefine+class+iklass+add=trace,redefine+class+iklass+purge=trace",
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"RedefineSharedClassJFR");
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if (args[0].equals("xshare-off")) {
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// First case is with -Xshare:off. In this case no classes are shared
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// and we should be able to clean out the retransformed classes. Verify
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// that the cleaning is done when the GC is triggered.
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List<String> offCommand = new ArrayList<>();
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offCommand.add("-Xshare:off");
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offCommand.addAll(baseCommand);
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(offCommand);
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new OutputAnalyzer(pb.start())
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.shouldContain(SHOULD_CLEAN_TRUE)
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.shouldNotContain(SHOULD_CLEAN_FALSE)
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// We expect at least one of the transformed classes to be in use, if
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// not the above check that should_clean_previous should be true will also
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// fail. This check is to show what is expected.
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.shouldContain(SCRATCH_CLASS_ADDED_ON_STACK)
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.shouldNotContain(SCRATCH_CLASS_ADDED_SHARED)
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.shouldHaveExitValue(0);
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return;
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} else if (args[0].equals("xshare-on")) {
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// With -Xshare:on, the shared classes can never be cleaned out. Check the
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// logs to verify we don't try to clean when we know it is not needed.
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List<String> onCommand = new ArrayList<>();
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onCommand.add("-Xshare:on");
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onCommand.addAll(baseCommand);
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(onCommand);
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new OutputAnalyzer(pb.start())
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.shouldContain(SHOULD_CLEAN_FALSE)
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.shouldNotContain(SHOULD_CLEAN_TRUE)
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.shouldContain(SCRATCH_CLASS_ADDED_SHARED)
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// If the below line occurs, then should_clean_previous_versions will be
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// true and the above shouldContain will trigger. This check is to
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// show the intention that we don't expect any non-shared transformed
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// classes to be in use.
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.shouldNotContain(SCRATCH_CLASS_ADDED_ON_STACK)
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.shouldHaveExitValue(0);
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return;
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}
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}
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// When run without any argument this class acts as test and we do a system GC
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// to trigger cleaning and get the output we want to check.
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System.gc();
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}
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}
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