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src/share/vm/services/serviceUtil.hpp@7bb995fbd3c0 (annotated)
src/share/vm/services/serviceUtil.hpp
Thu, 12 Mar 2009 18:16:36 -0700
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- Thu, 12 Mar 2009 18:16:36 -0700
- changeset 1063
- 7bb995fbd3c0
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| duke@435 | 1 | /* |
| duke@435 | 2 | * Copyright 2003 Sun Microsystems, Inc. All Rights Reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| duke@435 | 21 | * have any questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| duke@435 | 25 | // |
| duke@435 | 26 | // Serviceability utility functions. |
| duke@435 | 27 | // (Shared by MM and JVMTI). |
| duke@435 | 28 | // |
| duke@435 | 29 | class ServiceUtil : public AllStatic { |
| duke@435 | 30 | public: |
| duke@435 | 31 | |
| duke@435 | 32 | // Return true if oop represents an object that is "visible" |
| duke@435 | 33 | // to the java world. |
| duke@435 | 34 | static inline bool visible_oop(oop o) { |
| duke@435 | 35 | // the sentinel for deleted handles isn't visible |
| duke@435 | 36 | if (o == JNIHandles::deleted_handle()) { |
| duke@435 | 37 | return false; |
| duke@435 | 38 | } |
| duke@435 | 39 | |
| duke@435 | 40 | // ignore KlassKlass |
| duke@435 | 41 | if (o->is_klass()) { |
| duke@435 | 42 | return false; |
| duke@435 | 43 | } |
| duke@435 | 44 | |
| duke@435 | 45 | // instance |
| duke@435 | 46 | if (o->is_instance()) { |
| duke@435 | 47 | // instance objects are visible |
| duke@435 | 48 | if (o->klass() != SystemDictionary::class_klass()) { |
| duke@435 | 49 | return true; |
| duke@435 | 50 | } |
| duke@435 | 51 | if (java_lang_Class::is_primitive(o)) { |
| duke@435 | 52 | return true; |
| duke@435 | 53 | } |
| duke@435 | 54 | // java.lang.Classes are visible |
| duke@435 | 55 | o = java_lang_Class::as_klassOop(o); |
| duke@435 | 56 | if (o->is_klass()) { |
| duke@435 | 57 | // if it's a class for an object, an object array, or |
| duke@435 | 58 | // primitive (type) array then it's visible. |
| duke@435 | 59 | klassOop klass = (klassOop)o; |
| duke@435 | 60 | if (Klass::cast(klass)->oop_is_instance()) { |
| duke@435 | 61 | return true; |
| duke@435 | 62 | } |
| duke@435 | 63 | if (Klass::cast(klass)->oop_is_objArray()) { |
| duke@435 | 64 | return true; |
| duke@435 | 65 | } |
| duke@435 | 66 | if (Klass::cast(klass)->oop_is_typeArray()) { |
| duke@435 | 67 | return true; |
| duke@435 | 68 | } |
| duke@435 | 69 | } |
| duke@435 | 70 | return false; |
| duke@435 | 71 | } |
| duke@435 | 72 | // object arrays are visible if they aren't system object arrays |
| duke@435 | 73 | if (o->is_objArray()) { |
| duke@435 | 74 | objArrayOop array = (objArrayOop)o; |
| duke@435 | 75 | if (array->klass() != Universe::systemObjArrayKlassObj()) { |
| duke@435 | 76 | return true; |
| duke@435 | 77 | } else { |
| duke@435 | 78 | return false; |
| duke@435 | 79 | } |
| duke@435 | 80 | } |
| duke@435 | 81 | // type arrays are visible |
| duke@435 | 82 | if (o->is_typeArray()) { |
| duke@435 | 83 | return true; |
| duke@435 | 84 | } |
| duke@435 | 85 | // everything else (methodOops, ...) aren't visible |
| duke@435 | 86 | return false; |
| duke@435 | 87 | }; // end of visible_oop() |
| duke@435 | 88 | |
| duke@435 | 89 | }; |
