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/*
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* Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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//
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// Serviceability utility functions.
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// (Shared by MM and JVMTI).
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//
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class ServiceUtil : public AllStatic {
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public:
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// Return true if oop represents an object that is "visible"
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// to the java world.
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static inline bool visible_oop(oop o) {
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// the sentinel for deleted handles isn't visible
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if (o == JNIHandles::deleted_handle()) {
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return false;
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}
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// ignore KlassKlass
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if (o->is_klass()) {
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return false;
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}
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// instance
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if (o->is_instance()) {
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// instance objects are visible
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4571
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if (o->klass() != SystemDictionary::Class_klass()) {
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1
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return true;
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}
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if (java_lang_Class::is_primitive(o)) {
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return true;
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}
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// java.lang.Classes are visible
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o = java_lang_Class::as_klassOop(o);
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if (o->is_klass()) {
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// if it's a class for an object, an object array, or
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// primitive (type) array then it's visible.
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klassOop klass = (klassOop)o;
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if (Klass::cast(klass)->oop_is_instance()) {
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return true;
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}
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if (Klass::cast(klass)->oop_is_objArray()) {
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return true;
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}
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if (Klass::cast(klass)->oop_is_typeArray()) {
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return true;
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}
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}
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return false;
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}
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// object arrays are visible if they aren't system object arrays
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if (o->is_objArray()) {
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objArrayOop array = (objArrayOop)o;
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if (array->klass() != Universe::systemObjArrayKlassObj()) {
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return true;
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} else {
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return false;
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}
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}
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// type arrays are visible
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if (o->is_typeArray()) {
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return true;
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}
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// everything else (methodOops, ...) aren't visible
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return false;
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}; // end of visible_oop()
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};
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