/**
* Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
* contributors
*
* This file is part of EvoSuite.
*
* EvoSuite is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3.0 of the License, or
* (at your option) any later version.
*
* EvoSuite 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
* Lesser Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
*/
package org.evosuite.instrumentation.testability.transformer;
import org.evosuite.instrumentation.testability.BooleanHelper;
import org.evosuite.instrumentation.TransformationStatistics;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.tree.AbstractInsnNode;
import org.objectweb.asm.tree.LdcInsnNode;
import org.objectweb.asm.tree.MethodInsnNode;
import org.objectweb.asm.tree.MethodNode;
import org.objectweb.asm.tree.TypeInsnNode;
/**
* Replace instanceof operation with helper that puts int on the stack
*/
public class InstanceOfTransformer extends MethodNodeTransformer {
/* (non-Javadoc)
* @see org.evosuite.instrumentation.MethodNodeTransformer#transformTypeInsnNode(org.objectweb.asm.tree.MethodNode, org.objectweb.asm.tree.TypeInsnNode)
*/
@Override
protected AbstractInsnNode transformTypeInsnNode(MethodNode mn,
TypeInsnNode typeNode) {
if (typeNode.getOpcode() == Opcodes.INSTANCEOF) {
TransformationStatistics.transformInstanceOf();
// Depending on the class version we need a String or a Class
// TODO: This needs to be class version of the class that's loaded, not cn!
//ClassReader reader;
int version = 48;
/*
String name = typeNode.desc.replace('/', '.');
try {
reader = new ClassReader(name);
ClassNode parent = new ClassNode();
reader.accept(parent, ClassReader.SKIP_CODE);
version = parent.version;
} catch (IOException e) {
TestabilityTransformation.logger.info("Error reading class " + name);
}
*/
if (version >= 49) {
if (!typeNode.desc.startsWith("[")) {
LdcInsnNode lin = new LdcInsnNode(Type.getType("L"
+ typeNode.desc + ";"));
mn.instructions.insertBefore(typeNode, lin);
} else {
LdcInsnNode lin = new LdcInsnNode(Type.getType(typeNode.desc
+ ";"));
mn.instructions.insertBefore(typeNode, lin);
}
} else {
LdcInsnNode lin = new LdcInsnNode(typeNode.desc.replace('/', '.'));
mn.instructions.insertBefore(typeNode, lin);
MethodInsnNode n = new MethodInsnNode(
Opcodes.INVOKESTATIC,
Type.getInternalName(Class.class),
"forName",
Type.getMethodDescriptor(Type.getType(Class.class),
new Type[] { Type.getType(String.class) }));
mn.instructions.insertBefore(typeNode, n);
}
MethodInsnNode n = new MethodInsnNode(Opcodes.INVOKESTATIC,
Type.getInternalName(BooleanHelper.class), "instanceOf",
Type.getMethodDescriptor(Type.INT_TYPE,
new Type[] { Type.getType(Object.class),
Type.getType(Class.class) }));
mn.instructions.insertBefore(typeNode, n);
mn.instructions.remove(typeNode);
return n;
}
return typeNode;
}
}