Mercurial > hg > truffle
annotate src/share/vm/services/serviceUtil.hpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | f95d63e2154a |
| children | da91efe96a93 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2003, 2010, 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 |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_SERVICES_SERVICEUTIL_HPP |
| 26 #define SHARE_VM_SERVICES_SERVICEUTIL_HPP | |
| 27 | |
| 28 #include "classfile/systemDictionary.hpp" | |
| 29 #include "oops/objArrayOop.hpp" | |
| 30 | |
| 0 | 31 // |
| 32 // Serviceability utility functions. | |
| 33 // (Shared by MM and JVMTI). | |
| 34 // | |
| 35 class ServiceUtil : public AllStatic { | |
| 36 public: | |
| 37 | |
| 38 // Return true if oop represents an object that is "visible" | |
| 39 // to the java world. | |
| 40 static inline bool visible_oop(oop o) { | |
| 41 // the sentinel for deleted handles isn't visible | |
| 42 if (o == JNIHandles::deleted_handle()) { | |
| 43 return false; | |
| 44 } | |
| 45 | |
| 46 // ignore KlassKlass | |
| 47 if (o->is_klass()) { | |
| 48 return false; | |
| 49 } | |
| 50 | |
| 51 // instance | |
| 52 if (o->is_instance()) { | |
| 53 // instance objects are visible | |
| 1142 | 54 if (o->klass() != SystemDictionary::Class_klass()) { |
| 0 | 55 return true; |
| 56 } | |
| 57 if (java_lang_Class::is_primitive(o)) { | |
| 58 return true; | |
| 59 } | |
| 60 // java.lang.Classes are visible | |
| 61 o = java_lang_Class::as_klassOop(o); | |
| 62 if (o->is_klass()) { | |
| 63 // if it's a class for an object, an object array, or | |
| 64 // primitive (type) array then it's visible. | |
| 65 klassOop klass = (klassOop)o; | |
| 66 if (Klass::cast(klass)->oop_is_instance()) { | |
| 67 return true; | |
| 68 } | |
| 69 if (Klass::cast(klass)->oop_is_objArray()) { | |
| 70 return true; | |
| 71 } | |
| 72 if (Klass::cast(klass)->oop_is_typeArray()) { | |
| 73 return true; | |
| 74 } | |
| 75 } | |
| 76 return false; | |
| 77 } | |
| 78 // object arrays are visible if they aren't system object arrays | |
| 79 if (o->is_objArray()) { | |
| 80 objArrayOop array = (objArrayOop)o; | |
| 81 if (array->klass() != Universe::systemObjArrayKlassObj()) { | |
| 82 return true; | |
| 83 } else { | |
| 84 return false; | |
| 85 } | |
| 86 } | |
| 87 // type arrays are visible | |
| 88 if (o->is_typeArray()) { | |
| 89 return true; | |
| 90 } | |
| 91 // everything else (methodOops, ...) aren't visible | |
| 92 return false; | |
| 93 }; // end of visible_oop() | |
| 94 | |
| 95 }; | |
| 1972 | 96 |
| 97 #endif // SHARE_VM_SERVICES_SERVICEUTIL_HPP |