Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/SystemDictionaryHelper.java @ 11997:cd25d3be91c5
8012144: multiple SIGSEGVs fails on staxf
Summary: Forward port of 7u change to add additional fence() on RMO platforms, with a load_acquire on all platforms
Reviewed-by: dholmes, kvn
author | vladidan |
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date | Tue, 06 Aug 2013 20:01:40 -0400 |
parents | c18cbe5936b8 |
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rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2002, 2005, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.utilities; | |
26 | |
27 import java.util.*; | |
28 import sun.jvm.hotspot.oops.*; | |
29 import sun.jvm.hotspot.memory.*; | |
30 import sun.jvm.hotspot.runtime.*; | |
31 | |
32 public class SystemDictionaryHelper { | |
33 static { | |
34 VM.registerVMInitializedObserver(new Observer() { | |
35 public void update(Observable o, Object data) { | |
36 initialize(); | |
37 } | |
38 }); | |
39 } | |
40 | |
41 private static synchronized void initialize() { | |
42 klasses = null; | |
43 } | |
44 | |
45 // Instance klass array sorted by name. | |
46 private static InstanceKlass[] klasses; | |
47 | |
48 // side-effect!. caches the instance klass array. | |
49 public static synchronized InstanceKlass[] getAllInstanceKlasses() { | |
50 if (klasses != null) { | |
51 return klasses; | |
52 } | |
53 | |
54 final Vector tmp = new Vector(); | |
55 SystemDictionary dict = VM.getVM().getSystemDictionary(); | |
56 dict.classesDo(new SystemDictionary.ClassVisitor() { | |
57 public void visit(Klass k) { | |
58 if (k instanceof InstanceKlass) { | |
59 InstanceKlass ik = (InstanceKlass) k; | |
60 tmp.add(ik); | |
61 } | |
62 } | |
63 }); | |
64 | |
65 Object[] tmpArray = tmp.toArray(); | |
66 klasses = new InstanceKlass[tmpArray.length]; | |
67 System.arraycopy(tmpArray, 0, klasses, 0, tmpArray.length); | |
68 Arrays.sort(klasses, new Comparator() { | |
69 public int compare(Object o1, Object o2) { | |
70 InstanceKlass k1 = (InstanceKlass) o1; | |
71 InstanceKlass k2 = (InstanceKlass) o2; | |
72 Symbol s1 = k1.getName(); | |
73 Symbol s2 = k2.getName(); | |
74 return s1.asString().compareTo(s2.asString()); | |
75 } | |
76 }); | |
77 return klasses; | |
78 } | |
79 | |
80 // returns array of instance klasses whose name contains given namePart | |
81 public static InstanceKlass[] findInstanceKlasses(String namePart) { | |
82 namePart = namePart.replace('.', '/'); | |
83 InstanceKlass[] tmpKlasses = getAllInstanceKlasses(); | |
84 | |
85 Vector tmp = new Vector(); | |
86 for (int i = 0; i < tmpKlasses.length; i++) { | |
87 String name = tmpKlasses[i].getName().asString(); | |
88 if (name.indexOf(namePart) != -1) { | |
89 tmp.add(tmpKlasses[i]); | |
90 } | |
91 } | |
92 | |
93 Object[] tmpArray = tmp.toArray(); | |
94 InstanceKlass[] searchResult = new InstanceKlass[tmpArray.length]; | |
95 System.arraycopy(tmpArray, 0, searchResult, 0, tmpArray.length); | |
96 return searchResult; | |
97 } | |
98 | |
99 // find first class whose name matches exactly the given argument. | |
100 public static InstanceKlass findInstanceKlass(String className) { | |
101 // convert to internal name | |
102 className = className.replace('.', '/'); | |
103 SystemDictionary sysDict = VM.getVM().getSystemDictionary(); | |
104 | |
105 // check whether we have a bootstrap class of given name | |
106 Klass klass = sysDict.find(className, null, null); | |
107 if (klass != null) { | |
108 return (InstanceKlass) klass; | |
109 } | |
110 | |
111 // check whether we have a system class of given name | |
112 klass = sysDict.find(className, sysDict.javaSystemLoader(), null); | |
113 if (klass != null) { | |
114 return (InstanceKlass) klass; | |
115 } | |
116 | |
117 // didn't find bootstrap or system class of given name. | |
118 // search through the entire dictionary.. | |
119 InstanceKlass[] tmpKlasses = getAllInstanceKlasses(); | |
120 // instance klass array is sorted by name. do binary search | |
121 int low = 0; | |
122 int high = tmpKlasses.length-1; | |
123 | |
124 int mid = -1; | |
125 while (low <= high) { | |
126 mid = (low + high) >> 1; | |
127 InstanceKlass midVal = tmpKlasses[mid]; | |
128 int cmp = midVal.getName().asString().compareTo(className); | |
129 | |
130 if (cmp < 0) { | |
131 low = mid + 1; | |
132 } else if (cmp > 0) { | |
133 high = mid - 1; | |
134 } else { // match found | |
135 return tmpKlasses[mid]; | |
136 } | |
137 } | |
138 // no match .. | |
139 return null; | |
140 } | |
141 } |