Mercurial > hg > graal-jvmci-8

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

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial load
author duke
date Sat, 01 Dec 2007 00:00:00 +0000
parents
children c18cbe5936b8
comparison
equal deleted inserted replaced
-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2000-2004 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.oops;
26
27 import java.io.*;
28 import sun.jvm.hotspot.runtime.BasicType;
29 import sun.jvm.hotspot.utilities.*;
30
31 public class FieldType {
32
33 private Symbol signature;
34 private char first;
35
36 public FieldType(Symbol signature) {
37 this.signature = signature;
38 this.first = (char) signature.getByteAt(0);
39 if (Assert.ASSERTS_ENABLED) {
40 switch (this.first) {
41 case 'B':
42 case 'C':
43 case 'D':
44 case 'F':
45 case 'I':
46 case 'J':
47 case 'S':
48 case 'Z':
49 case 'L':
50 case '[':
51 break; // Ok. signature char known
52 default:
53 Assert.that(false, "Unknown char in field signature \"" + signature.asString() + "\": " + this.first);
54 }
55 }
56 }
57
58 public boolean isOop() { return isObject() || isArray(); }
59 public boolean isByte() { return first == 'B'; }
60 public boolean isChar() { return first == 'C'; }
61 public boolean isDouble() { return first == 'D'; }
62 public boolean isFloat() { return first == 'F'; }
63 public boolean isInt() { return first == 'I'; }
64 public boolean isLong() { return first == 'J'; }
65 public boolean isShort() { return first == 'S'; }
66 public boolean isBoolean() { return first == 'Z'; }
67 public boolean isObject() { return first == 'L'; }
68 public boolean isArray() { return first == '['; }
69
70 public static class ArrayInfo {
71 private int dimension;
72 private int elementBasicType; // See BasicType.java
73 // FIXME: consider adding name of element class
74
75 public ArrayInfo(int dimension, int elementBasicType) {
76 this.dimension = dimension;
77 this.elementBasicType = elementBasicType;
78 }
79
80 public int dimension() { return dimension; }
81 /** See BasicType.java */
82 public int elementBasicType() { return elementBasicType; }
83 }
84
85 /** Only valid for T_ARRAY; throws unspecified exception otherwise */
86 public ArrayInfo getArrayInfo() {
87 int index = 1;
88 int dim = 1;
89 index = skipOptionalSize(signature, index);
90 while (signature.getByteAt(index) == '[') {
91 index++;
92 dim++;
93 skipOptionalSize(signature, index);
94 }
95 int elementType = BasicType.charToType((char) signature.getByteAt(index));
96 return new ArrayInfo(dim, elementType);
97 }
98
99 private int skipOptionalSize(Symbol sig, int index) {
100 byte c = sig.getByteAt(index);
101 while (c >= '0' && c <= '9') {
102 ++index;
103 c = sig.getByteAt(index);
104 }
105 return index;
106 }
107 }