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// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
package org.objectweb.asm.benchmarks;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
/**
* A benchmark to benchmark different versions of ASM and possibly other bytecode libraries.
*
* @author Eric Bruneton
*/
public abstract class AbstractBenchmark {
// The directories where the different versions of ASM can be found.
private static final String BUILD_DIR = "/benchmarks/build/";
private static final String ASM4_0 = BUILD_DIR + "asm4.0/";
private static final String ASM5_0 = BUILD_DIR + "asm5.0.1/";
private static final String ASM6_0 = BUILD_DIR + "asm6.0/";
private static final String ASM6_1 = BUILD_DIR + "asm6.1.1/";
private static final String ASM6_2 = BUILD_DIR + "asm6.2.1/";
private static final String ASM_CORE_CURRENT = "/asm/build/classes/java/main/";
private static final String ASM_TREE_CURRENT = "/asm-tree/build/classes/java/main/";
private final String asmBenchmarkClass;
private final String userDir;
/** Some class files that can be used as input data for benchmarks. */
protected ArrayList<byte[]> classFiles;
/** The ASM versions that can be benchmarked. */
public enum AsmVersion {
V4_0,
V5_0,
V6_0,
V6_1,
V6_2,
V_CURRENT;
URL[] getUrls(final String baseUrl) throws MalformedURLException {
switch (this) {
case V4_0:
return new URL[] {new URL(baseUrl + ASM4_0)};
case V5_0:
return new URL[] {new URL(baseUrl + ASM5_0)};
case V6_0:
return new URL[] {new URL(baseUrl + ASM6_0)};
case V6_1:
return new URL[] {new URL(baseUrl + ASM6_1)};
case V6_2:
return new URL[] {new URL(baseUrl + ASM6_2)};
case V_CURRENT:
return new URL[] {
new URL(baseUrl + ASM_CORE_CURRENT), new URL(baseUrl + ASM_TREE_CURRENT)
};
default:
throw new AssertionError();
}
}
}
/**
* Constructs a new {@link AbstractBenchmark}.
*
* @param asmBenchmarkClass the benchmark class to instantiate for the ASM benchmarks.
*/
protected AbstractBenchmark(final String asmBenchmarkClass) {
this.asmBenchmarkClass = asmBenchmarkClass;
this.userDir = System.getProperty("user.dir");
}
/** Creates and populates {@link #classFiles} with some class files read from disk. */
protected void prepareClasses() throws IOException {
classFiles = new ArrayList<byte[]>();
findClasses(new File(userDir + ASM_CORE_CURRENT), classFiles);
findClasses(new File(userDir + ASM_TREE_CURRENT), classFiles);
}
private static void findClasses(final File directory, final ArrayList<byte[]> classFiles)
throws IOException {
for (File file : directory.listFiles()) {
if (file.isDirectory()) {
findClasses(file, classFiles);
} else if (file.getName().endsWith(".class")) {
classFiles.add(readInputStream(new FileInputStream(file)));
}
}
}
private static byte[] readInputStream(final InputStream inputStream) throws IOException {
try {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
byte[] data = new byte[8192];
int bytesRead;
while ((bytesRead = inputStream.read(data, 0, data.length)) != -1) {
outputStream.write(data, 0, bytesRead);
}
outputStream.flush();
return outputStream.toByteArray();
} finally {
try {
inputStream.close();
} catch (IOException e) {
// Nothing to do.
}
}
}
/** A factory of ASM benchmark objects, using a specific version of the ASM library. */
class AsmBenchmarkFactory extends URLClassLoader {
/**
* Constructs an {@link AsmBenchmarkFactory}.
*
* @param asmVersion the ASM version to use.
* @throws MalformedURLException
*/
AsmBenchmarkFactory(final AsmVersion asmVersion) throws MalformedURLException {
super(asmVersion.getUrls("file://" + userDir));
}
/**
* @return a new instance of the class specified in the benchmark's constructor.
* @throws ClassNotFoundException
* @throws IllegalAccessException
* @throws InstantiationException
*/
public Object newAsmBenchmark()
throws InstantiationException, IllegalAccessException, ClassNotFoundException {
return loadClass(asmBenchmarkClass).newInstance();
}
@Override
protected Class<?> loadClass(final String name, final boolean resolve)
throws ClassNotFoundException {
// Force the loading of the asmBenchmarkClass class by this class loader (and not its parent).
// This is needed to make sure that the classes it references (i.e. the ASM library classes)
// will be loaded by this class loader too.
if (name.startsWith(asmBenchmarkClass)) {
try {
byte[] classFile =
readInputStream(getResourceAsStream(name.replace('.', '/') + ".class"));
Class<?> c = defineClass(name, classFile, 0, classFile.length);
if (resolve) {
resolveClass(c);
}
return c;
} catch (Exception e) {
throw new ClassNotFoundException(name, e);
}
}
// Look for the specified class *first* in asmDirectories, *then* using the parent class
// loader. This is the reverse of the default lookup order, and is necessary to make sure we
// load the correct version of ASM (the parent class loader may have an ASM version in its
// class path, because some components of the JMH framework depend on ASM).
try {
Class<?> c = findClass(name);
if (resolve) {
resolveClass(c);
}
return c;
} catch (ClassNotFoundException e) {
return super.loadClass(name, resolve);
}
}
}
}
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