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