Mercurial > hg > Members > kono > jpf-core
view src/main/gov/nasa/jpf/jvm/bytecode/GETSTATIC.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 |
parents | |
children | db918c531e6d |
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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.ElementInfo; import gov.nasa.jpf.vm.FieldInfo; import gov.nasa.jpf.vm.Instruction; import gov.nasa.jpf.vm.LoadOnJPFRequired; import gov.nasa.jpf.vm.Scheduler; import gov.nasa.jpf.vm.StackFrame; import gov.nasa.jpf.vm.ThreadInfo; import gov.nasa.jpf.vm.bytecode.ReadInstruction; /** * Get static fieldInfo from class * ..., => ..., value */ public class GETSTATIC extends JVMStaticFieldInstruction implements ReadInstruction { public GETSTATIC(String fieldName, String clsDescriptor, String fieldDescriptor){ super(fieldName, clsDescriptor, fieldDescriptor); } @Override public Instruction execute (ThreadInfo ti) { FieldInfo fieldInfo; //--- check if this causes a class load by a user defined classloader try { fieldInfo = getFieldInfo(); } catch (LoadOnJPFRequired lre) { return ti.getPC(); } if (fieldInfo == null) { return ti.createAndThrowException("java.lang.NoSuchFieldError", (className + '.' + fname)); } //--- check if this has to trigger class initialization ClassInfo ciField = fieldInfo.getClassInfo(); if (!mi.isClinit(ciField) && ciField.pushRequiredClinits(ti)) { // note - this returns the next insn in the topmost clinit that just got pushed return ti.getPC(); } ElementInfo eiFieldOwner = ciField.getStaticElementInfo(); //--- check if this breaks the transition Scheduler scheduler = ti.getScheduler(); if (scheduler.canHaveSharedClassCG( ti, this, eiFieldOwner, fieldInfo)){ eiFieldOwner = scheduler.updateClassSharedness(ti, eiFieldOwner, fieldInfo); if (scheduler.setsSharedClassCG( ti, this, eiFieldOwner, fieldInfo)){ return this; // re-execute } } Object fieldAttr = eiFieldOwner.getFieldAttr(fieldInfo); StackFrame frame = ti.getModifiableTopFrame(); if (size == 1) { int ival = eiFieldOwner.get1SlotField(fieldInfo); lastValue = ival; if (fieldInfo.isReference()) { frame.pushRef(ival); } else { frame.push(ival); } if (fieldAttr != null) { frame.setOperandAttr(fieldAttr); } } else { long lval = eiFieldOwner.get2SlotField(fieldInfo); lastValue = lval; frame.pushLong(lval); if (fieldAttr != null) { frame.setLongOperandAttr(fieldAttr); } } return getNext(ti); } @Override public boolean isMonitorEnterPrologue(){ return GetHelper.isMonitorEnterPrologue(mi, insnIndex); } @Override public int getLength() { return 3; // opcode, index1, index2 } @Override public int getByteCode () { return 0xB2; } @Override public boolean isRead() { return true; } @Override public void accept(JVMInstructionVisitor insVisitor) { insVisitor.visit(this); } }