2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0.
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
19 package gov.nasa.jpf.jvm.bytecode;
21 import gov.nasa.jpf.vm.ElementInfo;
22 import gov.nasa.jpf.vm.MJIEnv;
23 import gov.nasa.jpf.vm.StackFrame;
24 import gov.nasa.jpf.vm.ThreadInfo;
25 import gov.nasa.jpf.vm.Types;
26 import gov.nasa.jpf.vm.bytecode.InstanceInvokeInstruction;
29 * base class for INVOKEVIRTUAL, INVOKESPECIAL and INVOLEINTERFACE
31 public abstract class InstanceInvocation extends JVMInvokeInstruction implements InstanceInvokeInstruction {
33 protected InstanceInvocation() {}
35 protected InstanceInvocation (String clsDescriptor, String methodName, String signature){
36 super(clsDescriptor, methodName, signature);
40 public int getArgSize () {
42 argSize = Types.getArgumentsSize(signature) + 1; // 'this'
49 public int getCalleeThis (ThreadInfo ti) {
50 if (!ti.isPostExec()){
51 // we have to dig out the 'this' reference from the callers stack
52 return ti.getCalleeThis( getArgSize());
60 public int getObjectSlot (StackFrame frame){
61 int top = frame.getTopPos();
62 int argSize = getArgSize();
64 if (argSize == 1){ // object ref is on top
68 return top - argSize -1;
72 public ElementInfo getThisElementInfo (ThreadInfo ti) {
73 int thisRef = getCalleeThis(ti);
74 if (thisRef != MJIEnv.NULL) {
75 return ti.getElementInfo(thisRef);
82 public void accept(JVMInstructionVisitor insVisitor) {
83 insVisitor.visit(this);