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- package org.aspectj.apache.bcel.verifier.structurals;
-
- /* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (https://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Apache" and "Apache Software Foundation" and
- * "Apache BCEL" must not be used to endorse or promote products
- * derived from this software without prior written permission. For
- * written permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * "Apache BCEL", nor may "Apache" appear in their name, without
- * prior written permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
- * ITS 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.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <https://www.apache.org/>.
- */
-
- import java.util.ArrayList;
-
- import org.aspectj.apache.bcel.generic.InstructionHandle;
-
- /**
- * An InstructionContext offers convenient access
- * to information like control flow successors and
- * such.
- *
- * @version $Id: InstructionContext.java,v 1.3 2009/09/09 19:56:20 aclement Exp $
- * @author <A HREF="https://www.inf.fu-berlin.de/~ehaase"/>Enver Haase</A>
- */
- public interface InstructionContext{
-
- /**
- * The getTag and setTag methods may be used for
- * temporary flagging, such as graph colouring.
- * Nothing in the InstructionContext object depends
- * on the value of the tag. JustIce does not use it.
- *
- * @see #setTag(int tag)
- */
- public int getTag();
-
- /**
- * The getTag and setTag methods may be used for
- * temporary flagging, such as graph colouring.
- * Nothing in the InstructionContext object depends
- * on the value of the tag. JustIce does not use it.
- *
- * @see #getTag()
- */
- public void setTag(int tag);
-
- /**
- * This method symbolically executes the Instruction
- * held in the InstructionContext.
- * It "merges in" the incoming execution frame situation
- * (see The Java Virtual Machine Specification, 2nd
- * edition, page 146).
- * By so doing, the outgoing execution frame situation
- * is calculated.
- *
- * This method is JustIce-specific and is usually of
- * no sense for users of the ControlFlowGraph class.
- * They should use getInstruction().accept(Visitor),
- * possibly in conjunction with the ExecutionVisitor.
- *
- *
- * @see ControlFlowGraph
- * @see ExecutionVisitor
- * @see #getOutFrame(ArrayList)
- * @return true - if and only if the "outgoing" frame situation
- * changed from the one before execute()ing.
- */
- boolean execute(Frame inFrame, ArrayList<InstructionContext> executionPredecessors, InstConstraintVisitor icv, ExecutionVisitor ev);
-
- /**
- * This method returns the outgoing execution frame situation;
- * therefore <B>it has to be calculated by execute(Frame, ArrayList)
- * first.</B>
- *
- * @see #execute(Frame, ArrayList, InstConstraintVisitor, ExecutionVisitor)
- */
- Frame getOutFrame(ArrayList<InstructionContext> executionPredecessors);
-
- /**
- * Returns the InstructionHandle this InstructionContext is wrapped around.
- *
- * @return The InstructionHandle this InstructionContext is wrapped around.
- */
- InstructionHandle getInstruction();
-
- /**
- * Returns the usual control flow successors.
- * @see #getExceptionHandlers()
- */
- InstructionContext[] getSuccessors();
-
- /**
- * Returns the exception handlers that protect this instruction.
- * They are special control flow successors.
- */
- ExceptionHandler[] getExceptionHandlers();
- }
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