/*
* Copyright © 2014 Cask Data, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package co.cask.cdap.internal.asm;
import com.google.common.io.ByteStreams;
import com.google.common.io.Files;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.util.CheckClassAdapter;
import org.objectweb.asm.util.TraceClassVisitor;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
/**
* Util class for debugging ASM bytecode generation.
*/
public final class Debugs {
public static void debugByteCode(ClassDefinition classDefinition, PrintWriter writer) {
ClassReader reader = new ClassReader(classDefinition.getBytecode());
reader.accept(new CheckClassAdapter(new TraceClassVisitor(writer)), 0);
File file = new File("/tmp/" + classDefinition.getInternalName() + ".class");
file.getParentFile().mkdirs();
writer.println(file);
writer.flush();
try {
ByteStreams.write(classDefinition.getBytecode(), Files.newOutputStreamSupplier(file));
} catch (IOException e) {
e.printStackTrace();
}
}
private Debugs() {}
}