0N/A/*
1879N/A * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
1472N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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0N/A
1879N/A#ifndef SHARE_VM_SERVICES_SERVICEUTIL_HPP
1879N/A#define SHARE_VM_SERVICES_SERVICEUTIL_HPP
1879N/A
1879N/A#include "classfile/systemDictionary.hpp"
1879N/A#include "oops/objArrayOop.hpp"
1879N/A
0N/A//
0N/A// Serviceability utility functions.
0N/A// (Shared by MM and JVMTI).
0N/A//
0N/Aclass ServiceUtil : public AllStatic {
0N/A public:
0N/A
0N/A // Return true if oop represents an object that is "visible"
0N/A // to the java world.
0N/A static inline bool visible_oop(oop o) {
0N/A // the sentinel for deleted handles isn't visible
0N/A if (o == JNIHandles::deleted_handle()) {
0N/A return false;
0N/A }
0N/A
0N/A // ignore KlassKlass
0N/A if (o->is_klass()) {
0N/A return false;
0N/A }
0N/A
0N/A // instance
0N/A if (o->is_instance()) {
0N/A // instance objects are visible
1142N/A if (o->klass() != SystemDictionary::Class_klass()) {
0N/A return true;
0N/A }
0N/A if (java_lang_Class::is_primitive(o)) {
0N/A return true;
0N/A }
0N/A // java.lang.Classes are visible
0N/A o = java_lang_Class::as_klassOop(o);
0N/A if (o->is_klass()) {
0N/A // if it's a class for an object, an object array, or
0N/A // primitive (type) array then it's visible.
0N/A klassOop klass = (klassOop)o;
0N/A if (Klass::cast(klass)->oop_is_instance()) {
0N/A return true;
0N/A }
0N/A if (Klass::cast(klass)->oop_is_objArray()) {
0N/A return true;
0N/A }
0N/A if (Klass::cast(klass)->oop_is_typeArray()) {
0N/A return true;
0N/A }
0N/A }
0N/A return false;
0N/A }
0N/A // object arrays are visible if they aren't system object arrays
0N/A if (o->is_objArray()) {
0N/A objArrayOop array = (objArrayOop)o;
0N/A if (array->klass() != Universe::systemObjArrayKlassObj()) {
0N/A return true;
0N/A } else {
0N/A return false;
0N/A }
0N/A }
0N/A // type arrays are visible
0N/A if (o->is_typeArray()) {
0N/A return true;
0N/A }
0N/A // everything else (methodOops, ...) aren't visible
0N/A return false;
0N/A }; // end of visible_oop()
0N/A
0N/A};
1879N/A
1879N/A#endif // SHARE_VM_SERVICES_SERVICEUTIL_HPP