Mercurial > hg > Members > kono > jpf-core

comparison src/main/gov/nasa/jpf/jvm/bytecode/INVOKESPECIAL.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
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
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
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.
17 */
18 package gov.nasa.jpf.jvm.bytecode;
19
20 import gov.nasa.jpf.vm.ClassInfo;
21 import gov.nasa.jpf.vm.ClassLoaderInfo;
22 import gov.nasa.jpf.vm.ElementInfo;
23 import gov.nasa.jpf.vm.Instruction;
24 import gov.nasa.jpf.vm.LoadOnJPFRequired;
25 import gov.nasa.jpf.vm.MethodInfo;
26 import gov.nasa.jpf.vm.ThreadInfo;
27
28
29 /**
30 * Invoke instance method; special handling for superclass, private,
31 * and instance initialization method invocations
32 * ..., objectref, [arg1, [arg2 ...]] => ...
33 *
34 * invokedMethod is supposed to be constant (ClassInfo can't change)
35 */
36 public class INVOKESPECIAL extends InstanceInvocation {
37
38 public INVOKESPECIAL (String clsDescriptor, String methodName, String signature){
39 super(clsDescriptor, methodName, signature);
40 }
41
42
43 @Override
44 public int getByteCode () {
45 return 0xB7;
46 }
47
48 @Override
49 public Instruction execute (ThreadInfo ti) {
50 int argSize = getArgSize();
51 int objRef = ti.getCalleeThis( argSize);
52 lastObj = objRef;
53
54 // we don't have to check for NULL objects since this is either a ctor, a
55 // private method, or a super method
56
57 MethodInfo callee;
58 try {
59 callee = getInvokedMethod(ti);
60 } catch(LoadOnJPFRequired rre) {
61 return ti.getPC();
62 }
63
64 if (callee == null){
65 return ti.createAndThrowException("java.lang.NoSuchMethodException", "Calling " + cname + '.' + mname);
66 }
67
68 ElementInfo ei = ti.getElementInfo(objRef);
69 if (callee.isSynchronized()){
70 ei = ti.getScheduler().updateObjectSharedness(ti, ei, null); // locks most likely belong to shared objects
71 if (reschedulesLockAcquisition(ti, ei)){
72 return this;
73 }
74 }
75
76 setupCallee( ti, callee); // this creates, initializes and pushes the callee StackFrame
77
78 return ti.getPC(); // we can't just return the first callee insn if a listener throws an exception
79 }
80
81 /**
82 * If the current thread already owns the lock, then the current thread can go on.
83 * For example, this is a recursive acquisition.
84 */
85 protected boolean isLockOwner(ThreadInfo ti, ElementInfo ei) {
86 return ei.getLockingThread() == ti;
87 }
88
89 /**
90 * If the object will still be owned, then the current thread can go on.
91 * For example, all but the last monitorexit for the object.
92 */
93 protected boolean isLastUnlock(ElementInfo ei) {
94 return ei.getLockCount() == 1;
95 }
96
97 /**
98 * we can do some more caching here - the MethodInfo should be const
99 */
100 @Override
101 public MethodInfo getInvokedMethod (ThreadInfo th) {
102
103 // since INVOKESPECIAL is only used for private methods and ctors,
104 // we don't have to deal with null object calls
105
106 if (invokedMethod == null) {
107 ClassInfo ci = ClassLoaderInfo.getCurrentResolvedClassInfo(cname);
108 boolean recursiveLookup = (mname.charAt(0) != '<'); // no hierarchy lookup for <init>
109 invokedMethod = ci.getMethod(mname, recursiveLookup);
110 }
111
112 return invokedMethod; // we can store internally
113 }
114
115 @Override
116 public String toString() {
117 return ("invokespecial " + cname + '.' + mname);
118 }
119
120 @Override
121 public Object getFieldValue (String id, ThreadInfo ti) {
122 int objRef = getCalleeThis(ti);
123 ElementInfo ei = ti.getElementInfo(objRef);
124
125 Object v = ei.getFieldValueObject(id);
126
127 if (v == null){ // try a static field
128 v = ei.getClassInfo().getStaticFieldValueObject(id);
129 }
130
131 return v;
132 }
133
134 @Override
135 public void accept(JVMInstructionVisitor insVisitor) {
136 insVisitor.visit(this);
137 }
138 }