org.evosuite.instrumentation.error.CastErrorInstrumentation Maven / Gradle / Ivy

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/**
 * Copyright (C) 2010-2018 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 .
 */
package org.evosuite.instrumentation.error;

import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;

public class CastErrorInstrumentation extends ErrorBranchInstrumenter {

	public CastErrorInstrumentation(ErrorConditionMethodAdapter mv) {
		super(mv);
	}

	@Override
	public void visitTypeInsn(int opcode, String type) {

		if (opcode == Opcodes.CHECKCAST) {
			Label origTarget = new Label();
			// Label origTarget = new AnnotatedLabel();
			// origTarget.info = Boolean.FALSE;
			mv.visitInsn(Opcodes.DUP);
			mv.tagBranch();
			mv.visitJumpInsn(Opcodes.IFNULL, origTarget);
			mv.visitInsn(Opcodes.DUP);
			mv.visitTypeInsn(Opcodes.INSTANCEOF, type);
			mv.tagBranch();
			mv.visitJumpInsn(Opcodes.IFNE, origTarget);
			mv.visitTypeInsn(Opcodes.NEW, "java/lang/ClassCastException");
			mv.visitInsn(Opcodes.DUP);
			mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/ClassCastException",
			                      "", "()V", false);
			mv.visitInsn(Opcodes.ATHROW);
			mv.visitLabel(origTarget);
			mv.tagBranchExit();
		}
	}
}