Mercurial > hg > Members > kono > jpf-core
view src/main/gov/nasa/jpf/jvm/bytecode/INVOKESTATIC.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.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.StaticElementInfo; import gov.nasa.jpf.vm.ThreadInfo; import gov.nasa.jpf.vm.Types; /** * Invoke a class (static) method * ..., [arg1, [arg2 ...]] => ... */ public class INVOKESTATIC extends JVMInvokeInstruction { ClassInfo ci; protected INVOKESTATIC (String clsDescriptor, String methodName, String signature){ super(clsDescriptor, methodName, signature); } protected ClassInfo getClassInfo () { if (ci == null) { ci = ClassLoaderInfo.getCurrentResolvedClassInfo(cname); } return ci; } @Override public int getByteCode () { return 0xB8; } @Override public String toPostExecString(){ StringBuilder sb = new StringBuilder(); sb.append(getMnemonic()); sb.append(' '); sb.append( invokedMethod.getFullName()); if (invokedMethod.isMJI()){ sb.append(" [native]"); } return sb.toString(); } public StaticElementInfo getStaticElementInfo (){ return getClassInfo().getStaticElementInfo(); } public int getClassObjectRef(){ return getClassInfo().getStaticElementInfo().getClassObjectRef(); } @Override public Instruction execute (ThreadInfo ti) { MethodInfo callee; try { callee = getInvokedMethod(ti); } catch (LoadOnJPFRequired lre) { return ti.getPC(); } if (callee == null) { return ti.createAndThrowException("java.lang.NoSuchMethodException", cname + '.' + mname); } // this can be actually different than (can be a base) ClassInfo ciCallee = callee.getClassInfo(); if (ciCallee.pushRequiredClinits(ti)) { // do class initialization before continuing // note - this returns the next insn in the topmost clinit that just got pushed return ti.getPC(); } if (callee.isSynchronized()) { ElementInfo ei = ciCallee.getClassObject(); 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 } @Override public MethodInfo getInvokedMethod(){ if (invokedMethod != null){ return invokedMethod; } else { // Hmm, this would be pre-exec, but if the current thread is not the one executing the insn // this might result in false sharedness of the class object return getInvokedMethod( ThreadInfo.getCurrentThread()); } } @Override public MethodInfo getInvokedMethod (ThreadInfo ti){ if (invokedMethod == null) { ClassInfo clsInfo = getClassInfo(); if (clsInfo != null){ MethodInfo callee = clsInfo.getMethod(mname, true); if (callee != null){ ClassInfo ciCallee = callee.getClassInfo(); // might be a superclass of ci, i.e. not what is referenced in the insn if (!ciCallee.isRegistered()){ // if it wasn't registered yet, classLoaded listeners didn't have a chance yet to modify it.. ciCallee.registerClass(ti); // .. and might replace/remove MethodInfos callee = clsInfo.getMethod(mname, true); } invokedMethod = callee; } } } return invokedMethod; } // can be different thatn the ci - method can be in a superclass public ClassInfo getInvokedClassInfo(){ return getInvokedMethod().getClassInfo(); } public String getInvokedClassName(){ return getInvokedClassInfo().getName(); } @Override public int getArgSize () { if (argSize < 0) { argSize = Types.getArgumentsSize(signature); } return argSize; } @Override public String toString() { // methodInfo not set outside real call context (requires target object) return "invokestatic " + cname + '.' + mname; } @Override public Object getFieldValue (String id, ThreadInfo ti) { return getClassInfo().getStaticFieldValueObject(id); } @Override public void accept(JVMInstructionVisitor insVisitor) { insVisitor.visit(this); } @Override public Instruction typeSafeClone(MethodInfo mi) { INVOKESTATIC clone = null; try { clone = (INVOKESTATIC) super.clone(); // reset the method that this insn belongs to clone.mi = mi; clone.invokedMethod = null; clone.lastObj = Integer.MIN_VALUE; clone.ci = null; } catch (CloneNotSupportedException e) { e.printStackTrace(); } return clone; } }