Mercurial > hg > Members > kono > jpf-core
view src/main/gov/nasa/jpf/jvm/bytecode/INVOKESPECIAL.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.jvm.bytecode; import gov.nasa.jpf.vm.ClassInfo; import gov.nasa.jpf.vm.ClassLoaderInfo; import gov.nasa.jpf.vm.ElementInfo; import gov.nasa.jpf.vm.Instruction; import gov.nasa.jpf.vm.LoadOnJPFRequired; import gov.nasa.jpf.vm.MethodInfo; import gov.nasa.jpf.vm.ThreadInfo; /** * Invoke instance method; special handling for superclass, private, * and instance initialization method invocations * ..., objectref, [arg1, [arg2 ...]] => ... * * invokedMethod is supposed to be constant (ClassInfo can't change) */ public class INVOKESPECIAL extends InstanceInvocation { public INVOKESPECIAL (String clsDescriptor, String methodName, String signature){ super(clsDescriptor, methodName, signature); } @Override public int getByteCode () { return 0xB7; } @Override public Instruction execute (ThreadInfo ti) { int argSize = getArgSize(); int objRef = ti.getCalleeThis( argSize); lastObj = objRef; // we don't have to check for NULL objects since this is either a ctor, a // private method, or a super method MethodInfo callee; try { callee = getInvokedMethod(ti); } catch(LoadOnJPFRequired rre) { return ti.getPC(); } if (callee == null){ return ti.createAndThrowException("java.lang.NoSuchMethodException", "Calling " + cname + '.' + mname); } ElementInfo ei = ti.getElementInfo(objRef); if (callee.isSynchronized()){ ei = ti.getScheduler().updateObjectSharedness(ti, ei, null); // locks most likely belong to shared objects if (reschedulesLockAcquisition(ti, ei)){ return this; } } setupCallee( ti, callee); // this creates, initializes and pushes the callee StackFrame return ti.getPC(); // we can't just return the first callee insn if a listener throws an exception } /** * If the current thread already owns the lock, then the current thread can go on. * For example, this is a recursive acquisition. */ protected boolean isLockOwner(ThreadInfo ti, ElementInfo ei) { return ei.getLockingThread() == ti; } /** * If the object will still be owned, then the current thread can go on. * For example, all but the last monitorexit for the object. */ protected boolean isLastUnlock(ElementInfo ei) { return ei.getLockCount() == 1; } /** * we can do some more caching here - the MethodInfo should be const */ @Override public MethodInfo getInvokedMethod (ThreadInfo th) { // since INVOKESPECIAL is only used for private methods and ctors, // we don't have to deal with null object calls if (invokedMethod == null) { ClassInfo ci = ClassLoaderInfo.getCurrentResolvedClassInfo(cname); boolean recursiveLookup = (mname.charAt(0) != '<'); // no hierarchy lookup for <init> invokedMethod = ci.getMethod(mname, recursiveLookup); } return invokedMethod; // we can store internally } @Override public String toString() { return ("invokespecial " + cname + '.' + mname); } @Override public Object getFieldValue (String id, ThreadInfo ti) { int objRef = getCalleeThis(ti); ElementInfo ei = ti.getElementInfo(objRef); Object v = ei.getFieldValueObject(id); if (v == null){ // try a static field v = ei.getClassInfo().getStaticFieldValueObject(id); } return v; } @Override public void accept(JVMInstructionVisitor insVisitor) { insVisitor.visit(this); } }