89 lines
3.5 KiB
Java
89 lines
3.5 KiB
Java
/*
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* Copyright (c) 2013, 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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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* @modules java.compiler
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* @run main/othervm/timeout=200 -Xmx1g FragmentMetaspace
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*/
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/**
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* @test id=8320331
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* @bug 8320331
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* @requires vm.debug
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* @library /test/lib
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* @modules java.base/jdk.internal.misc
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* @modules java.compiler
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* @run main/othervm/timeout=200 -XX:+UnlockDiagnosticVMOptions -XX:+VerifyDuringGC -Xmx1g FragmentMetaspace
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*/
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import java.io.IOException;
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import jdk.test.lib.classloader.GeneratingCompilingClassLoader;
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/**
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* Test that tries to fragment the native memory used by class loaders.
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* This test creates class loaders that load classes of increasing size for every
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* iteration. By increasing the size of the class meta data needed for every iteration
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* we stress the subsystem for allocating native memory for meta data.
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*/
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public class FragmentMetaspace {
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public static Class<?> c;
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public static void main(String... args) {
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runGrowing(Long.valueOf(System.getProperty("time", "40000")),
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Integer.valueOf(System.getProperty("iterations", "100")));
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// try to clean up and unload classes to decrease
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// class verification time in debug vm
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System.gc();
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}
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private static void runGrowing(long time, int iterations) {
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long startTime = System.currentTimeMillis();
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for (int i = 0; System.currentTimeMillis() < startTime + time && i < iterations; ++i) {
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try {
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GeneratingCompilingClassLoader gcl = new GeneratingCompilingClassLoader();
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// getGeneratedClasses throws a RuntimeException in cases where
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// the javac exit code is not 0. If the original reason for the exception is
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// a "java.lang.OutOfMemoryError: Java heap space",
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// increase the heap size in the @run tag and rerun the test.
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// The heap can be exhausted by this test, but heap exhaustion
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// is not a failure mode of this test and should be ignored.
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c = gcl.getGeneratedClasses(i, 100)[0];
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c.newInstance();
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c = null;
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gcl = null;
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} catch (IOException | InstantiationException | IllegalAccessException ex) {
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throw new RuntimeException(ex);
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} catch (OutOfMemoryError oome) {
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System.out.println("javac failed with OOM; ignored.");
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return;
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}
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}
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}
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}
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