Mercurial > hg > truffle
annotate src/share/vm/services/serviceUtil.hpp @ 1703:f6f3eef8a521
6581734: CMS Old Gen's collection usage is zero after GC which is incorrect
Summary: Management code enabled for use by a concurrent collector.
Reviewed-by: mchung, ysr
author | kevinw |
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date | Fri, 30 Jul 2010 22:43:50 +0100 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 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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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
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20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // | |
26 // Serviceability utility functions. | |
27 // (Shared by MM and JVMTI). | |
28 // | |
29 class ServiceUtil : public AllStatic { | |
30 public: | |
31 | |
32 // Return true if oop represents an object that is "visible" | |
33 // to the java world. | |
34 static inline bool visible_oop(oop o) { | |
35 // the sentinel for deleted handles isn't visible | |
36 if (o == JNIHandles::deleted_handle()) { | |
37 return false; | |
38 } | |
39 | |
40 // ignore KlassKlass | |
41 if (o->is_klass()) { | |
42 return false; | |
43 } | |
44 | |
45 // instance | |
46 if (o->is_instance()) { | |
47 // instance objects are visible | |
1142 | 48 if (o->klass() != SystemDictionary::Class_klass()) { |
0 | 49 return true; |
50 } | |
51 if (java_lang_Class::is_primitive(o)) { | |
52 return true; | |
53 } | |
54 // java.lang.Classes are visible | |
55 o = java_lang_Class::as_klassOop(o); | |
56 if (o->is_klass()) { | |
57 // if it's a class for an object, an object array, or | |
58 // primitive (type) array then it's visible. | |
59 klassOop klass = (klassOop)o; | |
60 if (Klass::cast(klass)->oop_is_instance()) { | |
61 return true; | |
62 } | |
63 if (Klass::cast(klass)->oop_is_objArray()) { | |
64 return true; | |
65 } | |
66 if (Klass::cast(klass)->oop_is_typeArray()) { | |
67 return true; | |
68 } | |
69 } | |
70 return false; | |
71 } | |
72 // object arrays are visible if they aren't system object arrays | |
73 if (o->is_objArray()) { | |
74 objArrayOop array = (objArrayOop)o; | |
75 if (array->klass() != Universe::systemObjArrayKlassObj()) { | |
76 return true; | |
77 } else { | |
78 return false; | |
79 } | |
80 } | |
81 // type arrays are visible | |
82 if (o->is_typeArray()) { | |
83 return true; | |
84 } | |
85 // everything else (methodOops, ...) aren't visible | |
86 return false; | |
87 }; // end of visible_oop() | |
88 | |
89 }; |