Mercurial > hg > Members > kono > jpf-core

comparison src/main/gov/nasa/jpf/jvm/bytecode/INVOKESTATIC.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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children db918c531e6d
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-1:000000000000 0:61d41facf527
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
21 import gov.nasa.jpf.vm.ClassInfo;
22 import gov.nasa.jpf.vm.ClassLoaderInfo;
23 import gov.nasa.jpf.vm.ElementInfo;
24 import gov.nasa.jpf.vm.Instruction;
25 import gov.nasa.jpf.vm.LoadOnJPFRequired;
26 import gov.nasa.jpf.vm.MethodInfo;
27 import gov.nasa.jpf.vm.StaticElementInfo;
28 import gov.nasa.jpf.vm.ThreadInfo;
29 import gov.nasa.jpf.vm.Types;
30
31
32 /**
33 * Invoke a class (static) method
34 * ..., [arg1, [arg2 ...]] => ...
35 */
36 public class INVOKESTATIC extends JVMInvokeInstruction {
37 ClassInfo ci;
38
39 protected INVOKESTATIC (String clsDescriptor, String methodName, String signature){
40 super(clsDescriptor, methodName, signature);
41 }
42
43 protected ClassInfo getClassInfo () {
44 if (ci == null) {
45 ci = ClassLoaderInfo.getCurrentResolvedClassInfo(cname);
46 }
47 return ci;
48 }
49
50 @Override
51 public int getByteCode () {
52 return 0xB8;
53 }
54
55 @Override
56 public String toPostExecString(){
57 StringBuilder sb = new StringBuilder();
58 sb.append(getMnemonic());
59 sb.append(' ');
60 sb.append( invokedMethod.getFullName());
61
62 if (invokedMethod.isMJI()){
63 sb.append(" [native]");
64 }
65
66 return sb.toString();
67
68 }
69
70 public StaticElementInfo getStaticElementInfo (){
71 return getClassInfo().getStaticElementInfo();
72 }
73
74 public int getClassObjectRef(){
75 return getClassInfo().getStaticElementInfo().getClassObjectRef();
76 }
77
78 @Override
79 public Instruction execute (ThreadInfo ti) {
80 MethodInfo callee;
81
82 try {
83 callee = getInvokedMethod(ti);
84 } catch (LoadOnJPFRequired lre) {
85 return ti.getPC();
86 }
87
88 if (callee == null) {
89 return ti.createAndThrowException("java.lang.NoSuchMethodException", cname + '.' + mname);
90 }
91
92 // this can be actually different than (can be a base)
93 ClassInfo ciCallee = callee.getClassInfo();
94
95 if (ciCallee.pushRequiredClinits(ti)) {
96 // do class initialization before continuing
97 // note - this returns the next insn in the topmost clinit that just got pushed
98 return ti.getPC();
99 }
100
101 if (callee.isSynchronized()) {
102 ElementInfo ei = ciCallee.getClassObject();
103 ei = ti.getScheduler().updateObjectSharedness(ti, ei, null); // locks most likely belong to shared objects
104
105 if (reschedulesLockAcquisition(ti, ei)){
106 return this;
107 }
108 }
109
110 setupCallee( ti, callee); // this creates, initializes and pushes the callee StackFrame
111
112 return ti.getPC(); // we can't just return the first callee insn if a listener throws an exception
113 }
114
115 @Override
116 public MethodInfo getInvokedMethod(){
117 if (invokedMethod != null){
118 return invokedMethod;
119 } else {
120 // Hmm, this would be pre-exec, but if the current thread is not the one executing the insn
121 // this might result in false sharedness of the class object
122 return getInvokedMethod( ThreadInfo.getCurrentThread());
123 }
124 }
125
126 @Override
127 public MethodInfo getInvokedMethod (ThreadInfo ti){
128 if (invokedMethod == null) {
129 ClassInfo clsInfo = getClassInfo();
130 if (clsInfo != null){
131 MethodInfo callee = clsInfo.getMethod(mname, true);
132 if (callee != null){
133 ClassInfo ciCallee = callee.getClassInfo(); // might be a superclass of ci, i.e. not what is referenced in the insn
134
135 if (!ciCallee.isRegistered()){
136 // if it wasn't registered yet, classLoaded listeners didn't have a chance yet to modify it..
137 ciCallee.registerClass(ti);
138 // .. and might replace/remove MethodInfos
139 callee = clsInfo.getMethod(mname, true);
140 }
141 invokedMethod = callee;
142 }
143 }
144 }
145 return invokedMethod;
146 }
147
148 // can be different thatn the ci - method can be in a superclass
149 public ClassInfo getInvokedClassInfo(){
150 return getInvokedMethod().getClassInfo();
151 }
152
153 public String getInvokedClassName(){
154 return getInvokedClassInfo().getName();
155 }
156
157 @Override
158 public int getArgSize () {
159 if (argSize < 0) {
160 argSize = Types.getArgumentsSize(signature);
161 }
162
163 return argSize;
164 }
165
166
167 @Override
168 public String toString() {
169 // methodInfo not set outside real call context (requires target object)
170 return "invokestatic " + cname + '.' + mname;
171 }
172
173 @Override
174 public Object getFieldValue (String id, ThreadInfo ti) {
175 return getClassInfo().getStaticFieldValueObject(id);
176 }
177
178 @Override
179 public void accept(JVMInstructionVisitor insVisitor) {
180 insVisitor.visit(this);
181 }
182
183 @Override
184 public Instruction typeSafeClone(MethodInfo mi) {
185 INVOKESTATIC clone = null;
186
187 try {
188 clone = (INVOKESTATIC) super.clone();
189
190 // reset the method that this insn belongs to
191 clone.mi = mi;
192
193 clone.invokedMethod = null;
194 clone.lastObj = Integer.MIN_VALUE;
195 clone.ci = null;
196 } catch (CloneNotSupportedException e) {
197 e.printStackTrace();
198 }
199
200 return clone;
201 }
202 }
203