| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package gc.g1.humongousObjects; |
| |
| import gc.testlibrary.Helpers; |
| import jdk.test.lib.Asserts; |
| import sun.hotspot.WhiteBox; |
| |
| import java.io.IOException; |
| import java.lang.reflect.InvocationTargetException; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| |
| /** |
| * @test gc.g1.humongousObjects.TestHumongousClassLoader |
| * @summary Checks that unreachable classes and unreachable humongous class loader are unloaded after GC |
| * @requires vm.gc.G1 |
| * @requires vm.opt.G1HeapRegionSize == "null" | vm.opt.G1HeapRegionSize == "1M" |
| * @requires vm.opt.ExplicitGCInvokesConcurrent != true |
| * @library /test/lib / |
| * @modules java.base/jdk.internal.misc |
| * @modules java.management |
| * @build sun.hotspot.WhiteBox |
| * @run driver ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * |
| * @run main/othervm/timeout=240 -Xms256M -Xmx256M -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. |
| * gc.g1.humongousObjects.ClassLoaderGenerator 1 |
| * |
| * @run main/othervm -Xms256M -Xmx256M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. |
| * -Xlog:class+load,class+unload=debug:file=TestHumongousClassLoader_Full_GC.log |
| * -XX:G1HeapRegionSize=1M |
| * gc.g1.humongousObjects.TestHumongousClassLoader FULL_GC |
| * |
| * @run main/othervm -Xms256M -Xmx256M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. |
| * -Xlog:class+load,class+unload=debug:file=TestHumongousClassLoader_Full_GC_Mem_Pressure.log |
| * -XX:G1HeapRegionSize=1M |
| * gc.g1.humongousObjects.TestHumongousClassLoader FULL_GC_MEMORY_PRESSURE |
| * |
| *@run main/othervm -Xms256M -Xmx256M -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. |
| * -Xlog:class+load,class+unload=debug:file=TestHumongousClassLoader_CMC.log |
| * -XX:G1HeapRegionSize=1M -XX:MaxTenuringThreshold=1 |
| * gc.g1.humongousObjects.TestHumongousClassLoader CMC |
| * |
| */ |
| |
| public class TestHumongousClassLoader { |
| |
| private static final WhiteBox WB = WhiteBox.getWhiteBox(); |
| private static final String SAMPLE_CLASS_NAME_PREFIX = "SampleClassFiller"; |
| public static final String SIMPLE_CLASSLOADER_NAME = "SimpleClassLoader"; |
| public static final String HUMONGOUS_CLASSLOADER_NAME = "HumongousClassLoader"; |
| |
| |
| public static final String LOAD_CLASS_METHOD_PROTOTYPE = |
| " @Override\n" |
| + " public Class loadClass(String fileName) throws ClassNotFoundException {\n" |
| + " if (${ClassLoadFilter}) {\n" |
| + " System.out.println(\"Loading class \" + fileName);\n" |
| + " byte[] b = null;\n" |
| + " try {\n" |
| + " b = Files.readAllBytes(new File(fileName + \".class\").toPath());\n" |
| + " } catch (IOException e) {\n" |
| + " e.printStackTrace();\n" |
| + " }\n" |
| + " Class c = defineClass(fileName, b, 0, b.length);\n" |
| + " resolveClass(c);\n" |
| + " return c;\n" |
| + " } else {\n" |
| + " return super.loadClass(fileName);\n" |
| + " }\n" |
| + "\n" |
| + "\n" |
| + " }\n"; |
| |
| public static final String CLASS_HEADER = "import java.io.File;\n" |
| + "import java.io.IOException;\n" |
| + "import java.nio.file.Files;\n" |
| + "import java.nio.file.Paths;\n"; |
| |
| public static final String GENERIC_PROTOTYPE = "${ClassHeader}\n" |
| + "public class ${ClassName} extends ${BaseClass}{\n" |
| + " ${ConstructorClause}\n" |
| + " ${Methods}\n" |
| + " ${Fields}\n" |
| + "}\n"; |
| |
| public static final String CONSTUCTOR_PROTOTYPE = "public ${ClassName}(ClassLoader parent) { super(parent);}\n"; |
| |
| private enum GC { |
| FULL_GC { |
| @Override |
| public void provoke() { |
| System.gc(); |
| } |
| }, |
| CMC { |
| @Override |
| public void provoke() { |
| // We need 2 young gc to promote class loader to old gen |
| // Otherwise it will not be unloaded after CMC |
| WHITE_BOX.youngGC(); |
| Helpers.waitTillCMCFinished(WHITE_BOX, 0); |
| WHITE_BOX.youngGC(); |
| Helpers.waitTillCMCFinished(WHITE_BOX, 0); |
| WHITE_BOX.g1StartConcMarkCycle(); |
| Helpers.waitTillCMCFinished(WHITE_BOX, 0); |
| } |
| }, |
| FULL_GC_MEMORY_PRESSURE { |
| @Override |
| public void provoke() { |
| WHITE_BOX.fullGC(); |
| } |
| }; |
| private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); |
| |
| public abstract void provoke(); |
| } |
| |
| public static void main(String[] args) throws ClassNotFoundException, InstantiationException, |
| IllegalAccessException, IOException, NoSuchMethodException, InvocationTargetException { |
| |
| if (args.length != 1) { |
| throw new Error("Test Bug: Expected GC type wasn't provided as command line argument"); |
| } |
| GC gc = GC.valueOf(args[0]); |
| |
| Path wrkDir = Paths.get(""); |
| URL[] url = {wrkDir.toUri().toURL()}; |
| URLClassLoader urlLoader = new URLClassLoader(url); |
| |
| Class<?> simpleClassLoaderClass = urlLoader.loadClass(SIMPLE_CLASSLOADER_NAME); |
| |
| ClassLoader simpleClassLoader = (ClassLoader) simpleClassLoaderClass |
| .getConstructor(java.lang.ClassLoader.class) |
| .newInstance(TestHumongousClassLoader.class.getClassLoader()); |
| |
| // Sanity check |
| Asserts.assertEquals(WB.g1IsHumongous(simpleClassLoader), false, |
| "Test Bug: simpleClassLoader is expected to be non-humongous but it's humongous"); |
| |
| |
| Class<?> humongousClassLoaderClass = simpleClassLoader.loadClass(HUMONGOUS_CLASSLOADER_NAME); |
| |
| ClassLoader humongousClassLoader = (ClassLoader) humongousClassLoaderClass |
| .getConstructor(java.lang.ClassLoader.class) |
| .newInstance(simpleClassLoader); |
| |
| // Sanity check |
| Asserts.assertEquals(WB.g1IsHumongous(humongousClassLoader), true, |
| "Test Bug: humongousClassLoader is expected to be humongous but it's non-humongous"); |
| |
| //Asserts.assertEquals(1,0); |
| |
| Object[] loadedClasses = new Object[]{ |
| G1SampleClass.LARGEST_NON_HUMONGOUS.getCls(humongousClassLoader, wrkDir, SAMPLE_CLASS_NAME_PREFIX) |
| .newInstance(), |
| G1SampleClass.SMALLEST_HUMONGOUS.getCls(humongousClassLoader, wrkDir, SAMPLE_CLASS_NAME_PREFIX) |
| .newInstance(), |
| G1SampleClass.ONE_REGION_HUMONGOUS.getCls(humongousClassLoader, wrkDir, SAMPLE_CLASS_NAME_PREFIX) |
| .newInstance(), |
| G1SampleClass.TWO_REGION_HUMONGOUS.getCls(humongousClassLoader, wrkDir, SAMPLE_CLASS_NAME_PREFIX) |
| .newInstance(), |
| }; |
| |
| // forgetting references to loaded classes |
| for (int i = 0; i < loadedClasses.length; ++i) { |
| loadedClasses[i] = null; |
| } |
| |
| // forgetting referencies to classloaders |
| humongousClassLoader = null; |
| humongousClassLoaderClass = null; |
| |
| simpleClassLoader = null; |
| simpleClassLoaderClass = null; |
| |
| gc.provoke(); |
| |
| // Test checks |
| Asserts.assertEquals(WB.isClassAlive(HUMONGOUS_CLASSLOADER_NAME), false, |
| String.format("Classloader class %s is loaded after we forget all references to it", |
| HUMONGOUS_CLASSLOADER_NAME)); |
| |
| for (G1SampleClass sampleClass : G1SampleClass.values()) { |
| String className = Helpers.enumNameToClassName(sampleClass.name()) + "Class"; |
| Asserts.assertEquals(WB.isClassAlive(className), false, |
| String.format("Class %s is loaded after we forget all references to it", className)); |
| } |
| } |
| |
| } |