215 lines
9.2 KiB
Java
215 lines
9.2 KiB
Java
/*
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* Copyright (c) 2016, 2022, 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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package gc.g1.humongousObjects;
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import gc.testlibrary.Helpers;
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import jdk.test.lib.Asserts;
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import jdk.test.whitebox.WhiteBox;
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import java.io.IOException;
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import java.lang.reflect.InvocationTargetException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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/**
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* @test gc.g1.humongousObjects.TestHumongousClassLoader
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* @summary Checks that unreachable classes and unreachable humongous class loader are unloaded after GC
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* @requires vm.gc.G1
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* @requires vm.opt.G1HeapRegionSize == "null" | vm.opt.G1HeapRegionSize == "1M"
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* @requires vm.opt.ExplicitGCInvokesConcurrent != true
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* @requires vm.opt.ClassUnloading != false
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* @requires vm.opt.ClassUnloadingWithConcurrentMark != false
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* @library /test/lib /
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* @modules java.base/jdk.internal.misc
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* @modules java.management
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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*
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* @run main/othervm/timeout=240 -Xms256M -Xmx256M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
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* gc.g1.humongousObjects.ClassLoaderGenerator 1
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*
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* @run main/othervm -Xms256M -Xmx256M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
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* -Xlog:class+load,class+unload=debug:file=TestHumongousClassLoader_Full_GC.log
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* -XX:G1HeapRegionSize=1M
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* gc.g1.humongousObjects.TestHumongousClassLoader FULL_GC
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*
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* @run main/othervm -Xms256M -Xmx256M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
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* -Xlog:class+load,class+unload=debug:file=TestHumongousClassLoader_Full_GC_Mem_Pressure.log
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* -XX:G1HeapRegionSize=1M
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* gc.g1.humongousObjects.TestHumongousClassLoader FULL_GC_MEMORY_PRESSURE
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*
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*@run main/othervm -Xms256M -Xmx256M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:.
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* -Xlog:class+load,class+unload=debug:file=TestHumongousClassLoader_CMC.log
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* -XX:G1HeapRegionSize=1M -XX:MaxTenuringThreshold=1
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* gc.g1.humongousObjects.TestHumongousClassLoader CMC
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*
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*/
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public class TestHumongousClassLoader {
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private static final WhiteBox WB = WhiteBox.getWhiteBox();
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private static final String SAMPLE_CLASS_NAME_PREFIX = "SampleClassFiller";
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public static final String SIMPLE_CLASSLOADER_NAME = "SimpleClassLoader";
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public static final String HUMONGOUS_CLASSLOADER_NAME = "HumongousClassLoader";
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public static final String LOAD_CLASS_METHOD_PROTOTYPE =
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" @Override\n"
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+ " public Class loadClass(String fileName) throws ClassNotFoundException {\n"
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+ " if (${ClassLoadFilter}) {\n"
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+ " System.out.println(\"Loading class \" + fileName);\n"
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+ " byte[] b = null;\n"
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+ " try {\n"
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+ " b = Files.readAllBytes(new File(fileName + \".class\").toPath());\n"
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+ " } catch (IOException e) {\n"
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+ " e.printStackTrace();\n"
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+ " }\n"
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+ " Class c = defineClass(fileName, b, 0, b.length);\n"
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+ " resolveClass(c);\n"
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+ " return c;\n"
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+ " } else {\n"
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+ " return super.loadClass(fileName);\n"
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+ " }\n"
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+ "\n"
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+ "\n"
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+ " }\n";
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public static final String CLASS_HEADER = "import java.io.File;\n"
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+ "import java.io.IOException;\n"
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+ "import java.nio.file.Files;\n"
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+ "import java.nio.file.Paths;\n";
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public static final String GENERIC_PROTOTYPE = "${ClassHeader}\n"
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+ "public class ${ClassName} extends ${BaseClass}{\n"
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+ " ${ConstructorClause}\n"
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+ " ${Methods}\n"
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+ " ${Fields}\n"
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+ "}\n";
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public static final String CONSTUCTOR_PROTOTYPE = "public ${ClassName}(ClassLoader parent) { super(parent);}\n";
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private enum GC {
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FULL_GC {
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@Override
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public void provoke() {
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System.gc();
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}
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},
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CMC {
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@Override
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public void provoke() {
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// We need 2 young gc to promote class loader to old gen
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// Otherwise it will not be unloaded after CMC
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WHITE_BOX.youngGC();
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Helpers.waitTillCMCFinished(WHITE_BOX, 0);
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WHITE_BOX.youngGC();
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WHITE_BOX.g1RunConcurrentGC();
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}
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},
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FULL_GC_MEMORY_PRESSURE {
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@Override
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public void provoke() {
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WHITE_BOX.fullGC();
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}
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};
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private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
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public abstract void provoke();
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}
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public static void main(String[] args) throws Exception {
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if (args.length != 1) {
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throw new Error("Test Bug: Expected GC type wasn't provided as command line argument");
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}
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GC gc = GC.valueOf(args[0]);
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Path wrkDir = Paths.get("");
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URL[] url = {wrkDir.toUri().toURL()};
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URLClassLoader urlLoader = new URLClassLoader(url);
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Class<?> simpleClassLoaderClass = urlLoader.loadClass(SIMPLE_CLASSLOADER_NAME);
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urlLoader.close();
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ClassLoader simpleClassLoader = (ClassLoader) simpleClassLoaderClass
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.getConstructor(java.lang.ClassLoader.class)
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.newInstance(TestHumongousClassLoader.class.getClassLoader());
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// Sanity check
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Asserts.assertEquals(WB.g1IsHumongous(simpleClassLoader), false,
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"Test Bug: simpleClassLoader is expected to be non-humongous but it's humongous");
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Class<?> humongousClassLoaderClass = simpleClassLoader.loadClass(HUMONGOUS_CLASSLOADER_NAME);
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ClassLoader humongousClassLoader = (ClassLoader) humongousClassLoaderClass
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.getConstructor(java.lang.ClassLoader.class)
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.newInstance(simpleClassLoader);
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// Sanity check
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Asserts.assertEquals(WB.g1IsHumongous(humongousClassLoader), true,
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"Test Bug: humongousClassLoader is expected to be humongous but it's non-humongous");
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//Asserts.assertEquals(1,0);
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Object[] loadedClasses = new Object[]{
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G1SampleClass.LARGEST_NON_HUMONGOUS.getCls(humongousClassLoader, wrkDir, SAMPLE_CLASS_NAME_PREFIX)
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.newInstance(),
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G1SampleClass.SMALLEST_HUMONGOUS.getCls(humongousClassLoader, wrkDir, SAMPLE_CLASS_NAME_PREFIX)
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.newInstance(),
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G1SampleClass.ONE_REGION_HUMONGOUS.getCls(humongousClassLoader, wrkDir, SAMPLE_CLASS_NAME_PREFIX)
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.newInstance(),
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G1SampleClass.TWO_REGION_HUMONGOUS.getCls(humongousClassLoader, wrkDir, SAMPLE_CLASS_NAME_PREFIX)
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.newInstance(),
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};
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// forgetting references to loaded classes
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for (int i = 0; i < loadedClasses.length; ++i) {
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loadedClasses[i] = null;
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}
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// forgetting referencies to classloaders
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humongousClassLoader = null;
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humongousClassLoaderClass = null;
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simpleClassLoader = null;
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simpleClassLoaderClass = null;
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gc.provoke();
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// Test checks
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Asserts.assertEquals(WB.isClassAlive(HUMONGOUS_CLASSLOADER_NAME), false,
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String.format("Classloader class %s is loaded after we forget all references to it",
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HUMONGOUS_CLASSLOADER_NAME));
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for (G1SampleClass sampleClass : G1SampleClass.values()) {
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String className = Helpers.enumNameToClassName(sampleClass.name()) + "Class";
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Asserts.assertEquals(WB.isClassAlive(className), false,
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String.format("Class %s is loaded after we forget all references to it", className));
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}
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}
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}
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