--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/instrument/ManyMethodsBenchmarkAgent.java Fri Mar 06 04:58:53 2015 -0800
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2015, 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
+ * @bug 8046246
+ * @summary Tests and benchmarks the JVMTI RedefineClasses when a
+ * single class (and its parent) contains many methods.
+ *
+ * @run build ManyMethodsBenchmarkApp ManyMethodsBenchmarkAgent
+ * @run shell MakeJAR3.sh ManyMethodsBenchmarkAgent 'Can-Retransform-Classes: true'
+ * @run main/othervm -javaagent:ManyMethodsBenchmarkAgent.jar ManyMethodsBenchmarkApp
+ */
+import java.lang.instrument.*;
+
+public class ManyMethodsBenchmarkAgent
+{
+ public static boolean fail = false;
+ public static boolean completed = false;
+ private static Instrumentation instrumentation;
+
+ public static void
+ premain( String agentArgs,
+ Instrumentation instrumentation) {
+ System.out.println("ManyMethodsBenchmarkAgent started");
+ ManyMethodsBenchmarkAgent.instrumentation = instrumentation;
+ System.out.println("ManyMethodsBenchmarkAgent finished");
+ }
+
+ static void instr() {
+ System.out.println("ManyMethodsBenchmarkAgent.instr started");
+
+ Class[] allClasses = instrumentation.getAllLoadedClasses();
+
+ for (int i = 0; i < allClasses.length; i++) {
+ Class klass = allClasses[i];
+ String name = klass.getName();
+ if (!name.equals("Base")) {
+ continue;
+ }
+ System.err.println("Instrumenting the class: " + klass);
+
+ try {
+ instrumentation.retransformClasses(klass);
+ } catch (Throwable e) {
+ System.err.println("Error: bad return from retransform: " + klass);
+ System.err.println(" ERROR: " + e);
+ fail = true;
+ }
+ }
+ completed = true;
+ System.out.println("ManyMethodsBenchmarkAgent.instr finished");
+ }
+
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/instrument/ManyMethodsBenchmarkApp.java Fri Mar 06 04:58:53 2015 -0800
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2015 Google Inc. 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.File;
+import java.io.FileWriter;
+import java.io.PrintStream;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Type;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.Arrays;
+import java.util.List;
+import javax.tools.JavaCompiler;
+import javax.tools.StandardJavaFileManager;
+import javax.tools.ToolProvider;
+
+/**
+ * A manual benchmark of the JVMTI RedefineClasses when a
+ * single class (and its parent) contains many methods.
+ */
+public class ManyMethodsBenchmarkApp {
+ // Limit is 64k but we can not put such many as the CP limit is 32k.
+ // In practice, it means a real limit is much lower (less than 22000).
+ static final int METHOD_COUNT = 20000;
+
+ static Class<?> loadClassInNewClassLoader(String className) throws Exception {
+ URL[] urls = { new File(".").toURI().toURL() };
+ URLClassLoader ucl = new URLClassLoader(urls, null);
+ Class<?> klazz = Class.forName(className, true, ucl);
+ return klazz;
+ }
+
+ static void benchmarkClassOperations(String className) throws Exception {
+ Class<?> klazz = loadClassInNewClassLoader(className);
+
+ Method[] methods = klazz.getDeclaredMethods();
+ if (methods.length != METHOD_COUNT) {
+ throw new AssertionError("unexpected method count: " + methods.length +
+ " expected: " + METHOD_COUNT);
+ }
+
+ methods = klazz.getMethods();
+ // returned methods includes those inherited from Object
+ int objectMethodSlop = 100;
+ if (methods.length <= METHOD_COUNT ||
+ methods.length >= METHOD_COUNT + objectMethodSlop) {
+ throw new AssertionError("unexpected method count: " + methods.length);
+ }
+
+ // Invoke methods to make them appear in the constant pool cache
+ Object obj = klazz.newInstance();
+ Object[] args = new Object[0];
+ for (Method m: methods) {
+ try {
+ Class<?>[] types = m.getParameterTypes();
+ String name = m.getName();
+ // System.out.println("method: " + name + "; argno: " + types.length);
+ if (types.length == 0 && name.length() == 2 && name.startsWith("f")) {
+ m.invoke(obj, args);
+ }
+ } catch (InvocationTargetException ex) {
+ ex.printStackTrace();
+ }
+ }
+ }
+
+ public static void main(String[] args) throws Exception {
+ System.out.println("test started: ManyMethodsBenchmarkApp");
+
+ // Create source files with many methods
+ File base = new File("Base.java");
+ try (FileWriter fw = new FileWriter(base)) {
+ fw.write("public class Base {\n");
+ final int L = 10;
+ // Each of the first L methods makes calls to its own chunk of METHOD_COUNT/L methods
+ for (int k = 0; k < L; k++) {
+ fw.write(" public void f" + k + "() {\n");
+ int shift = (k == 0) ? L : 0;
+ for (int i = (k * (METHOD_COUNT/L)) + shift; i < (k + 1) * METHOD_COUNT/L; i++) {
+ fw.write(" f" + i + "();\n");
+ }
+ fw.write(" }\n");
+ }
+
+ // The rest of (METHOD_COUNT - L) methods have empty body
+ for (int i = L; i < METHOD_COUNT; i++) {
+ fw.write(" public static void f" + i + "() {}\n");
+ }
+ fw.write("}\n");
+ }
+
+ // Compile the generated source files.
+ JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
+ List<File> files = Arrays.asList(new File[] { base });
+ try (StandardJavaFileManager fileManager =
+ compiler.getStandardFileManager(null, null, null)) {
+ compiler.getTask(null, fileManager, null, null, null,
+ fileManager.getJavaFileObjectsFromFiles(files))
+ .call();
+ }
+
+ benchmarkClassOperations("Base");
+
+ ManyMethodsBenchmarkAgent.instr();
+
+ // Cleanup
+ base.delete();
+ new File("Base.class").delete();
+ if (!ManyMethodsBenchmarkAgent.completed) {
+ throw new Exception("ERROR: ManyMethodsBenchmarkAgent did not complete.");
+ }
+
+ if (ManyMethodsBenchmarkAgent.fail) {
+ throw new Exception("ERROR: ManyMethodsBenchmarkAgent failed.");
+ } else {
+ System.out.println("ManyMethodsBenchmarkAgent succeeded.");
+ }
+ System.out.println("test finished: ManyMethodsBenchmarkApp");
+ }
+}