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Java > Open Source Codes > soot > jimple > toolkits > pointer > nativemethods > JavaLangThreadNative


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 2003 Feng Qian
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17  * Boston, MA 02111-1307, USA.
18  */
19
20 /**
21  * Simulates the native method side effects in class java.lang.Thread
22  *
23  * @author Feng Qian
24  * @author <XXX>
25  */
26
27 package soot.jimple.toolkits.pointer.nativemethods;
28
29 import soot.*;
30 import soot.jimple.toolkits.pointer.representations.*;
31 import soot.jimple.toolkits.pointer.util.*;
32
33 public class JavaLangThreadNative extends NativeMethodClass {
34     public JavaLangThreadNative( NativeHelper helper ) { super(helper); }
35
36   /**
37    * Implements the abstract method simulateMethod.
38    * It distributes the request to the corresponding methods
39    * by signatures.
40    */
41   public void simulateMethod(SootMethod method,
42                  ReferenceVariable thisVar,
43                  ReferenceVariable returnVar,
44                  ReferenceVariable params[]){
45
46     String JavaDoc subSignature = method.getSubSignature();
47
48     if (subSignature.equals("java.lang.Thread currentThread()")){
49       java_lang_Thread_currentThread(method, thisVar, returnVar, params);
50       return;
51
52     } else {
53       defaultMethod(method, thisVar, returnVar, params);
54       return;
55
56     }
57   }
58   /*************************** java.lang.Thread **********************/
59   /**
60    * Returns the single variable pointing to all thread objects.
61    *
62    * This makes our analysis conservative on thread objects.
63    *
64    * public static native java.lang.Thread currentThread();
65    */
66   public
67     void java_lang_Thread_currentThread(SootMethod method,
68                     ReferenceVariable thisVar,
69                     ReferenceVariable returnVar,
70                     ReferenceVariable params[]){
71     helper.assignObjectTo(returnVar, Environment.v().getThreadObject());
72   }
73
74   /**
75    * Following native methods have no side effects.
76    *
77    * private static native void registerNatives();
78    * public static native void yield();
79    * public static native void sleep(long)
80    * throws java.lang.InterruptedException;
81    * public native synchronized void start();
82    * private native boolean isInterrupted(boolean);
83    * public final native boolean isAlive();
84    * public native int countStackFrames();
85    * private native void setPriority0(int);
86    * private native void stop0(java.lang.Object);
87    * private native void suspend0();
88    * private native void resume0();
89    * private native void interrupt0();
90    */
91 }
92
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