1 /* 2 * Copyright (c) 2010, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package nsk.sysdict.share; 25 26 import java.io.File; 27 import java.net.MalformedURLException; 28 import java.net.URL; 29 import java.net.URLClassLoader; 30 import java.util.ArrayList; 31 import java.util.Arrays; 32 import java.util.List; 33 import java.util.Random; 34 import nsk.share.ClassUnloader; 35 import nsk.share.TestFailure; 36 import nsk.share.gc.ThreadedGCTest; 37 import nsk.share.gc.gp.GarbageUtils; 38 import nsk.share.test.ExecutionController; 39 40 /** 41 * This is the base class for btree & chain tests. It is a standard GCThreaded Test. 42 */ 43 public abstract class SysDictTest extends ThreadedGCTest { 44 45 static String PACKAGE_PREFIX = "nsk.sysdict.share."; 46 // Should we additionally use ClassUnloader.unload to stress GC 47 private boolean isHeapStressed = false; 48 // Should we use one JarLoader or a lot of them 49 private boolean useSingleLoader = true; 50 // Should we use fats.jar with little amount large classes or not 51 boolean useFats = false; 52 URL[] jars; 53 parseArgs(String args[])54 protected void parseArgs(String args[]) { 55 for (int i = 0; i < args.length; i++) { 56 if (args[i].equals("-stressHeap")) { 57 isHeapStressed = true; 58 } 59 if (args[i].equals("-useFatClass")) { 60 useFats = true; 61 } 62 if (args[i].equals("-useSingleLoader")) { 63 this.useSingleLoader = false; 64 } 65 // jar path is in useal classpath format 66 if (args[i].equals("-jarpath")) { 67 String[] files = args[i + 1].split(File.pathSeparator); 68 jars = new URL[files.length]; 69 for (int j = 0; j < files.length; j++) { 70 try { 71 jars[j] = new File(files[j]).toURI().toURL(); 72 } catch (MalformedURLException e) { 73 throw new TestFailure(e); 74 } 75 } 76 } 77 } 78 } 79 80 // each time we create a new classloader createJarLoader()81 protected ClassLoader createJarLoader() { 82 return new URLClassLoader(jars); 83 } 84 85 // The btree and chain tests differs by loaders and classes 86 // let define them in subclasses createLoaders()87 abstract ClassLoader[] createLoaders(); 88 getClassNames()89 abstract String[] getClassNames(); 90 createClassLoadersInternal()91 ClassLoader[] createClassLoadersInternal() { 92 if (!useSingleLoader) { 93 return createLoaders(); 94 } else { 95 ClassLoader[] single = new ClassLoader[1]; 96 single[0] = createJarLoader(); 97 return single; 98 } 99 } 100 volatile ClassLoader[] currentClassLoaders; 101 102 class Worker implements Runnable { 103 104 private ClassLoader loader; 105 private String[] names; 106 private ExecutionController stresser; 107 int index; 108 public String tmp; 109 Worker(int number, String[] classnames)110 public Worker(int number, String[] classnames) { 111 112 this.index = number; 113 this.names = new String[classnames.length]; 114 List<String> listNames = new ArrayList<String>(classnames.length); 115 listNames.addAll(Arrays.asList(classnames)); 116 for (int i = 0; i < classnames.length; i++) { 117 int idx1 = new Random().nextInt(listNames.size()); 118 this.names[i] = listNames.remove(idx1); 119 } 120 } 121 122 @Override run()123 public void run() { 124 if (stresser == null) { 125 stresser = getExecutionController(); 126 } 127 128 // only first thread update all classloaders 129 // do not care about synchronization 130 if (index == 0) { 131 try { 132 currentClassLoaders = createClassLoadersInternal(); 133 } catch (OutOfMemoryError oome) { 134 // skip iterations until all loaders will be unloaded 135 Thread.yield(); 136 return; 137 } 138 } 139 for (int i = 0; i < names.length; i++) { 140 try { 141 String name = names[i]; 142 if (!stresser.continueExecution()) { 143 return; 144 } 145 // just check if loader was updated 146 loader = currentClassLoaders[index]; 147 Class clz = Class.forName(name, true, loader); 148 // set name into public variable just to be sure 149 // that class is loaded 150 tmp = clz.getName(); 151 } catch (ClassNotFoundException cnfe) { 152 throw new TestFailure(cnfe); 153 } catch (OutOfMemoryError oome) { 154 // just ignore 155 // we do not check memory leaks in PermGen in this tests 156 } catch (StackOverflowError soe) { 157 // just ignore, chains could be too large 158 // StackOverflowError could be in some sparcs 159 } 160 } 161 if (isHeapStressed) { 162 GarbageUtils.eatMemory(stresser, 50, 1024, 0); 163 } 164 } 165 } 166 167 @Override createRunnable(int i)168 protected Runnable createRunnable(int i) { 169 currentClassLoaders = createClassLoadersInternal(); 170 return new Worker(i % currentClassLoaders.length, getClassNames()); 171 } 172 } 173