Mercurial > hg > Members > kono > jpf-core
view src/main/gov/nasa/jpf/vm/Step.java @ 0:61d41facf527
initial v8 import (history reset)
author | Peter Mehlitz <Peter.C.Mehlitz@nasa.gov> |
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date | Fri, 23 Jan 2015 10:14:01 -0800 |
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/* * Copyright (C) 2014, United States Government, as represented by the * Administrator of the National Aeronautics and Space Administration. * All rights reserved. * * The Java Pathfinder core (jpf-core) platform is 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 gov.nasa.jpf.vm; import gov.nasa.jpf.util.Source; import java.util.WeakHashMap; /** * this corresponds to an executed instruction. Note that we can have a * potentially huge number of Steps, hence we want to save objects here * (e.g. Collection overhead) */ public class Step { private static WeakHashMap<Step, String> s_comments = new WeakHashMap<Step, String>(); // Not every Step gets a comment. So save memory and put comments in a global comment HashMap. Make this a WeakHashMap so that old Step objects can be GCed. private final Instruction insn; Step next; public Step (Instruction insn) { if (insn == null) throw new IllegalArgumentException("insn == null"); this.insn = insn; } public Step getNext() { return next; } public Instruction getInstruction() { return insn; } public void setComment (String s) { s_comments.put(this, s); } public String getComment () { return s_comments.get(this); } public String getLineString () { MethodInfo mi = insn.getMethodInfo(); if (mi != null) { Source source = Source.getSource(mi.getSourceFileName()); if (source != null) { int line = mi.getLineNumber(insn); if (line > 0) { return source.getLine(line); } } } return null; } public boolean sameSourceLocation (Step other){ if (other != null){ MethodInfo mi = insn.getMethodInfo(); MethodInfo miOther = other.insn.getMethodInfo(); if (mi == miOther){ return (mi.getLineNumber(insn) == miOther.getLineNumber(other.insn)); } } return false; } public String getLocationString() { MethodInfo mi = insn.getMethodInfo(); if (mi != null) { return mi.getSourceFileName() + ':' + mi.getLineNumber(insn); } return "?:?"; } @Override public String toString() { return getLocationString(); } }