diff options
Diffstat (limited to 'benchmarks/src/jmh/java/org/objectweb/asm/benchmarks/BcelAdapter.java')
-rw-r--r-- | benchmarks/src/jmh/java/org/objectweb/asm/benchmarks/BcelAdapter.java | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/benchmarks/src/jmh/java/org/objectweb/asm/benchmarks/BcelAdapter.java b/benchmarks/src/jmh/java/org/objectweb/asm/benchmarks/BcelAdapter.java new file mode 100644 index 00000000..04dd541d --- /dev/null +++ b/benchmarks/src/jmh/java/org/objectweb/asm/benchmarks/BcelAdapter.java @@ -0,0 +1,82 @@ +// 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.ByteArrayInputStream; +import java.io.IOException; +import org.apache.bcel.classfile.ClassParser; +import org.apache.bcel.classfile.JavaClass; +import org.apache.bcel.classfile.Method; +import org.apache.bcel.generic.ClassGen; +import org.apache.bcel.generic.ConstantPoolGen; +import org.apache.bcel.generic.InstructionHandle; +import org.apache.bcel.generic.InstructionList; +import org.apache.bcel.generic.MethodGen; +import org.aspectj.apache.bcel.classfile.ClassFormatException; + +/** + * An {@link Adapter} implemented with the BCEL library. + * + * @author Eric Bruneton + */ +public class BcelAdapter extends Adapter { + + @Override + public byte[] readAndWrite(final byte[] classFile, final boolean computeMaxs) { + JavaClass javaClass; + try { + javaClass = new ClassParser(new ByteArrayInputStream(classFile), "class-name").parse(); + } catch (ClassFormatException | IOException e) { + throw new IllegalArgumentException(e); + } + ClassGen classGen = new ClassGen(javaClass); + ConstantPoolGen constantPoolGen = classGen.getConstantPool(); + for (Method method : classGen.getMethods()) { + MethodGen methodGen = new MethodGen(method, classGen.getClassName(), constantPoolGen); + if (method.getLocalVariableTable() == null) { + methodGen.removeLocalVariables(); + } + if (method.getLineNumberTable() == null) { + methodGen.removeLineNumbers(); + } + InstructionList insnList = methodGen.getInstructionList(); + if (insnList != null) { + InstructionHandle insnHandle = insnList.getStart(); + while (insnHandle != null) { + insnHandle = insnHandle.getNext(); + } + if (computeMaxs) { + methodGen.setMaxStack(); + methodGen.setMaxLocals(); + } + } + classGen.replaceMethod(method, methodGen.getMethod()); + } + return classGen.getJavaClass().getBytes(); + } +} |