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Java > Open Source Codes > gov > nasa > jpf > jvm > bytecode > NEW


1 //
2 // Copyright (C) 2005 United States Government as represented by the
3 // Administrator of the National Aeronautics and Space Administration
4 // (NASA). All Rights Reserved.
5 //
6 // This software is distributed under the NASA Open Source Agreement
7 // (NOSA), version 1.3. The NOSA has been approved by the Open Source
8 // Initiative. See the file NOSA-1.3-JPF at the top of the distribution
9 // directory tree for the complete NOSA document.
10 //
11 // THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY
12 // KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT
13 // LIMITED TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO
14 // SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
15 // A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT
16 // THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT
17 // DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE SUBJECT SOFTWARE.
18 //
19 package gov.nasa.jpf.jvm.bytecode;
20
21 import gov.nasa.jpf.jvm.ClassInfo;
22 import gov.nasa.jpf.jvm.KernelState;
23 import gov.nasa.jpf.jvm.SystemState;
24 import gov.nasa.jpf.jvm.ThreadInfo;
25
26 import org.apache.bcel.classfile.ConstantPool;
27 import gov.nasa.jpf.jvm.DynamicArea;
28
29
30 /**
31  * Create new object
32  * ... => ..., objectref
33  */
34 public class NEW extends Instruction {
35   protected String JavaDoc cname;
36
37   public void setPeer (org.apache.bcel.generic.Instruction i, ConstantPool cp) {
38     cname = cp.constantToString(cp.getConstant(
39                                       ((org.apache.bcel.generic.NEW) i).getIndex()));
40   }
41
42   public Instruction execute (SystemState ss, KernelState ks, ThreadInfo ti) {
43     ClassInfo ci = ClassInfo.getClassInfo(cname);
44     DynamicArea heap = DynamicArea.getHeap();
45     
46     if (heap.getOutOfMemory()) { // simulate OutOfMemoryError
47 return ti.createAndThrowException("java.lang.OutOfMemoryError",
48                                         "trying to allocate new " + cname);
49     }
50     
51     int objRef = heap.newObject(ci, ti);
52
53     if (ci.instanceOf("java.lang.Thread")) {
54       ti.getVM().createThread(objRef); // not running yet
55 }
56
57     // pushes the return value onto the stack
58 ti.push(objRef, true);
59
60     return getNext(ti);
61   }
62
63   public int getByteCode () {
64     return 0xBB;
65   }
66 }
67
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