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

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 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.utilities;
26
27 import java.util.regex.*;
28
29 /** Provides helper routines for parsing simple C++ expressions such
30 as "(JavaThread *) 0xf00" and "Universe::_collectedHeap". */
31
32 public class CPPExpressions {
33 private static Pattern castPattern;
34
35 /** Represents a cast expression such as "(JavaThread *)
36 0xf00". Returns both the type to which we are casting as well as
37 the address. */
38 public static class CastExpr {
39 private String type;
40 private String address;
41
42 private CastExpr(String type, String address) {
43 this.type = type;
44 this.address = address;
45 }
46
47 public String getType() {
48 return type;
49 }
50
51 public String getAddress() {
52 return address;
53 }
54 }
55
56 /** Represents a static field expression such as "Universe::_collectedHeap". */
57 public static class StaticFieldExpr {
58 private String containingType;
59 private String fieldName;
60
61 private StaticFieldExpr(String containingType, String fieldName) {
62 this.containingType = containingType;
63 this.fieldName = fieldName;
64 }
65
66 public String getContainingType() {
67 return containingType;
68 }
69
70 public String getFieldName() {
71 return fieldName;
72 }
73 }
74
75 /** Attempts to parse the given string into a CastExpr. Returns null
76 if the string did not match the supported pattern. */
77 public static CastExpr parseCast(String expr) {
78 if (castPattern == null) {
79 castPattern = Pattern.compile("\\s*\\(\\s*([0-9A-Za-z:_]*)\\s*\\*\\s*\\)\\s*([0-9a-zA-Z]*)\\s*");
80 }
81 Matcher matcher = castPattern.matcher(expr);
82 if (matcher.matches()) {
83 String type = matcher.group(1);
84 String addr = matcher.group(2);
85 return new CastExpr(type, addr);
86 }
87 return null;
88 }
89
90 /** Attempts to parse the given string into a
91 StaticFieldExpr. Returns null if the string did not match the
92 supported pattern. */
93 public static StaticFieldExpr parseStaticField(String expr) {
94 String sep = "::";
95 int idx = expr.lastIndexOf(sep);
96 if (idx < 0) {
97 return null;
98 }
99 String containingType = expr.substring(0, idx);
100 String fieldName = expr.substring(idx + sep.length(), expr.length());
101 return new StaticFieldExpr(containingType, fieldName);
102 }
103 }