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comparison agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeNewArray.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.interpreter;
26
27 import sun.jvm.hotspot.oops.*;
28 import sun.jvm.hotspot.utilities.*;
29
30 public class BytecodeNewArray extends Bytecode {
31 BytecodeNewArray(Method method, int bci) {
32 super(method, bci);
33 }
34
35 public int getType() {
36 return (int) javaByteAt(1);
37 }
38
39 public void verify() {
40 if (Assert.ASSERTS_ENABLED) {
41 Assert.that(isValid(), "check newarray");
42 }
43 }
44
45 public boolean isValid() {
46 boolean result = javaCode() == Bytecodes._newarray;
47 if (result == false) return false;
48 switch (getType()) {
49 case TypeArrayKlass.T_BOOLEAN:
50 case TypeArrayKlass.T_CHAR:
51 case TypeArrayKlass.T_FLOAT:
52 case TypeArrayKlass.T_DOUBLE:
53 case TypeArrayKlass.T_BYTE:
54 case TypeArrayKlass.T_SHORT:
55 case TypeArrayKlass.T_INT:
56 case TypeArrayKlass.T_LONG:
57 break;
58 default:
59 return false;
60 }
61
62 return true;
63 }
64
65 public String getTypeName() {
66 String result;
67 switch (getType()) {
68 case TypeArrayKlass.T_BOOLEAN:
69 result = "boolean";
70 break;
71
72 case TypeArrayKlass.T_CHAR:
73 result = "char";
74 break;
75
76 case TypeArrayKlass.T_FLOAT:
77 result = "float";
78 break;
79
80 case TypeArrayKlass.T_DOUBLE:
81 result = "double";
82 break;
83
84 case TypeArrayKlass.T_BYTE:
85 result = "byte";
86 break;
87
88 case TypeArrayKlass.T_SHORT:
89 result = "short";
90 break;
91
92 case TypeArrayKlass.T_INT:
93 result = "int";
94 break;
95
96 case TypeArrayKlass.T_LONG:
97 result = "long";
98 break;
99
100 default: // should not happen
101 result = "<invalid>";
102 break;
103 }
104
105 return result;
106 }
107
108 public static BytecodeNewArray at(Method method, int bci) {
109 BytecodeNewArray b = new BytecodeNewArray(method, bci);
110 if (Assert.ASSERTS_ENABLED) {
111 b.verify();
112 }
113 return b;
114 }
115
116 /** Like at, but returns null if the BCI is not at newarray */
117 public static BytecodeNewArray atCheck(Method method, int bci) {
118 BytecodeNewArray b = new BytecodeNewArray(method, bci);
119 return (b.isValid() ? b : null);
120 }
121
122 public static BytecodeNewArray at(BytecodeStream bcs) {
123 return new BytecodeNewArray(bcs.method(), bcs.bci());
124 }
125
126 public String toString() {
127 StringBuffer buf = new StringBuffer();
128 buf.append("newarray");
129 buf.append(spaces);
130 buf.append(getTypeName());
131 return buf.toString();
132 }
133 }