# HG changeset patch # User ctornqvi # Date 1369323572 -7200 # Node ID 699d9df07e593ffde7812fbc3c7d69c882ece61d # Parent 6bd680e9ea357e57de2792fa5df2482f4f285447 8009576: Test returns ClassNotFoundException Summary: Small classpath fix and move tests into open Reviewed-by: mgerdin, zgu diff -r 6bd680e9ea35 -r 699d9df07e59 test/runtime/Metaspace/FragmentMetaspace.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/Metaspace/FragmentMetaspace.java Thu May 23 17:39:32 2013 +0200 @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2013, 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. + */ + +/** + * @test + * @library /runtime/testlibrary + * @build GeneratedClassLoader + * @run main/othervm/timeout=200 FragmentMetaspace + */ + +import java.io.IOException; + +/** + * Test that tries to fragment the native memory used by class loaders. + * This test creates class loaders that load classes of increasing size for every + * iteration. By increasing the size of the class meta data needed for every iteration + * we stress the subsystem for allocating native memory for meta data. + */ +public class FragmentMetaspace { + + public static void main(String... args) { + runGrowing(Long.valueOf(System.getProperty("time", "80000"))); + // try to clean up and unload classes to decrease + // class verification time in debug vm + System.gc(); + } + + private static void runGrowing(long time) { + long startTime = System.currentTimeMillis(); + for (int i = 0; System.currentTimeMillis() < startTime + time; ++i) { + try { + GeneratedClassLoader gcl = new GeneratedClassLoader(); + + Class c = gcl.getGeneratedClasses(i, 100)[0]; + c.newInstance(); + c = null; + + gcl = null; + } catch (IOException|InstantiationException|IllegalAccessException ex) { + throw new RuntimeException(ex); + } + } + } +} diff -r 6bd680e9ea35 -r 699d9df07e59 test/runtime/Metaspace/FragmentMetaspaceSimple.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/Metaspace/FragmentMetaspaceSimple.java Thu May 23 17:39:32 2013 +0200 @@ -0,0 +1,69 @@ +/* + * Copyright (c) 2013, 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. + */ + +/** + * @test + * @library /runtime/testlibrary + * @library classes + * @build test.Empty ClassUnloadCommon + * @run main/othervm/timeout=200 FragmentMetaspaceSimple + */ + +import java.util.ArrayList; + +/** + * Test that tries to fragment the native memory used by class loaders. + * Keeps every other class loader alive in order to fragment the memory space + * used to store classes and meta data. Since the memory is probably allocated in + * chunks per class loader this will cause a lot of fragmentation if not handled + * properly since every other chunk will be unused. + */ +public class FragmentMetaspaceSimple { + public static void main(String... args) { + runSimple(Long.valueOf(System.getProperty("time", "80000"))); + System.gc(); + } + + private static void runSimple(long time) { + long startTime = System.currentTimeMillis(); + ArrayList cls = new ArrayList<>(); + for (int i = 0; System.currentTimeMillis() < startTime + time; ++i) { + ClassLoader ldr = ClassUnloadCommon.newClassLoader(); + if (i % 1000 == 0) { + cls.clear(); + } + // only keep every other class loader alive + if (i % 2 == 1) { + cls.add(ldr); + } + Class c = null; + try { + c = ldr.loadClass("test.Empty"); + } catch (ClassNotFoundException ex) { + throw new RuntimeException(ex); + } + c = null; + } + cls = null; + } +} diff -r 6bd680e9ea35 -r 699d9df07e59 test/runtime/Metaspace/classes/test/Empty.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/Metaspace/classes/test/Empty.java Thu May 23 17:39:32 2013 +0200 @@ -0,0 +1,28 @@ +/* + * Copyright (c) 2013, 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 test; + +public class Empty { +public String toString() { return "nothing"; } +} diff -r 6bd680e9ea35 -r 699d9df07e59 test/runtime/testlibrary/GeneratedClassLoader.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/testlibrary/GeneratedClassLoader.java Thu May 23 17:39:32 2013 +0200 @@ -0,0 +1,202 @@ +/* + * Copyright (c) 2013, 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. + */ + +import java.io.DataInputStream; +import java.io.File; +import java.io.FileInputStream; +import java.io.FileWriter; +import java.io.IOException; +import java.io.PrintWriter; +import javax.tools.JavaCompiler; +import javax.tools.ToolProvider; + +/** + * A class loader that generates new classes. + * The generated classes are made by first emitting java sources with nested + * static classes, these are then compiled and the class files are read back. + * Some efforts are made to make the class instances unique and of not insignificant + * size. + */ +public class GeneratedClassLoader extends ClassLoader { + /** + * Holds a pair of class bytecodes and class name (for use with defineClass). + */ + private static class GeneratedClass { + public byte[] bytes; + public String name; + public GeneratedClass(byte[] bytes, String name) { + this.bytes = bytes; this.name = name; + } + } + + /** + * Used to uniquely name every class generated. + */ + private static int count = 0; + /** + * Used to enable/disable keeping the class files and java sources for + * the generated classes. + */ + private static boolean deleteFiles = Boolean.parseBoolean( + System.getProperty("GeneratedClassLoader.deleteFiles", "true")); + + private static String bigstr = + "Lorem ipsum dolor sit amet, consectetur adipiscing elit. " + + "In facilisis scelerisque vehicula. Donec congue nisi a " + + "leo posuere placerat lobortis felis ultrices. Pellentesque " + + "habitant morbi tristique senectus et netus et malesuada " + + "fames ac turpis egestas. Nam tristique velit at felis " + + "iaculis at tempor sem vestibulum. Sed adipiscing lectus " + + "non mi molestie sagittis. Morbi eu purus urna. Nam tempor " + + "tristique massa eget semper. Mauris cursus, nulla et ornare " + + "vehicula, leo dolor scelerisque metus, sit amet rutrum erat " + + "sapien quis dui. Nullam eleifend risus et velit accumsan sed " + + "suscipit felis pulvinar. Nullam faucibus suscipit gravida. " + + "Pellentesque habitant morbi tristique senectus et netus et " + + "malesuada fames ac turpis egestas. Nullam ut massa augue, " + + "nec viverra mauris."; + + private static int getNextCount() { + return count++; + } + + ////// end statics + + private JavaCompiler javac; + private String nameBase; + + public GeneratedClassLoader() { + javac = ToolProvider.getSystemJavaCompiler(); + nameBase = "TestSimpleClass"; + } + + private long getBigValue(int which) { + // > 65536 is too large to encode in the bytecode + // so this will force us to emit a constant pool entry for this int + return (long)which + 65537; + } + + private String getBigString(int which) { + return bigstr + which; + } + + private String getClassName(int count) { + return nameBase + count; + } + + private String generateSource(int count, int sizeFactor, int numClasses) { + StringBuilder sb = new StringBuilder(); + sb.append("public class ").append(getClassName(count)).append("{\n"); + for (int j = 0; j < numClasses; ++j) { + sb.append("public static class ") + .append("Class") + .append(j) + .append("{\n"); + for (int i = 0; i < sizeFactor; ++i) { + int value = i; + sb.append("private long field") + .append(i).append(" = ") + .append(getBigValue(value++)) + .append(";\n"); + sb.append("public long method") + .append(i) + .append("() {\n"); + sb.append("return ") + .append(getBigValue(value++)) + .append(";"); + sb.append("}\n"); + sb.append("private String str").append(i) + .append(" = \"") + .append(getBigString(i)) + .append("\";"); + } + sb.append("\n}"); + } + sb.append("\n}"); + return sb.toString(); + } + + private GeneratedClass[] getGeneratedClass(int sizeFactor, int numClasses) throws IOException { + int uniqueCount = getNextCount(); + String src = generateSource(uniqueCount, sizeFactor, numClasses); + String className = getClassName(uniqueCount); + File file = new File(className + ".java"); + try (PrintWriter pw = new PrintWriter(new FileWriter(file))) { + pw.append(src); + pw.flush(); + } + int exitcode = javac.run(null, null, null, file.getCanonicalPath()); + if (exitcode != 0) { + throw new RuntimeException("javac failure when compiling: " + + file.getCanonicalPath()); + } else { + if (deleteFiles) { + file.delete(); + } + } + GeneratedClass[] gc = new GeneratedClass[numClasses]; + for (int i = 0; i < numClasses; ++i) { + String name = className + "$" + "Class" + i; + File classFile = new File(name + ".class"); + byte[] bytes; + try (DataInputStream dis = new DataInputStream(new FileInputStream(classFile))) { + bytes = new byte[dis.available()]; + dis.readFully(bytes); + } + if (deleteFiles) { + classFile.delete(); + } + gc[i] = new GeneratedClass(bytes, name); + } + if (deleteFiles) { + new File(className + ".class").delete(); + } + return gc; + } + + /** + * Generate a single class, compile it and load it. + * @param sizeFactor Fuzzy measure of how large the class should be. + * @return the Class instance. + * @throws IOException + */ + public Class generateClass(int sizeFactor) throws IOException { + return getGeneratedClasses(sizeFactor, 1)[0]; + } + + /** + * Generate several classes, compile and load them. + * @param sizeFactor Fuzzy measure of how large each class should be. + * @param numClasses The number of classes to create + * @return an array of the Class instances. + * @throws IOException + */ + public Class[] getGeneratedClasses(int sizeFactor, int numClasses) throws IOException { + GeneratedClass[] gc = getGeneratedClass(sizeFactor, numClasses); + Class[] classes = new Class[numClasses]; + for (int i = 0; i < numClasses; ++i) { + classes[i] = defineClass(gc[i].name, gc[i].bytes, 0 , gc[i].bytes.length); + } + return classes; + } +}