1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/services/serviceUtil.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,86 @@
1.4 +/*
1.5 + * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_SERVICES_SERVICEUTIL_HPP
1.29 +#define SHARE_VM_SERVICES_SERVICEUTIL_HPP
1.30 +
1.31 +#include "classfile/systemDictionary.hpp"
1.32 +#include "oops/objArrayOop.hpp"
1.33 +
1.34 +//
1.35 +// Serviceability utility functions.
1.36 +// (Shared by MM and JVMTI).
1.37 +//
1.38 +class ServiceUtil : public AllStatic {
1.39 + public:
1.40 +
1.41 + // Return true if oop represents an object that is "visible"
1.42 + // to the java world.
1.43 + static inline bool visible_oop(oop o) {
1.44 + // the sentinel for deleted handles isn't visible
1.45 + if (o == JNIHandles::deleted_handle()) {
1.46 + return false;
1.47 + }
1.48 +
1.49 + // instance
1.50 + if (o->is_instance()) {
1.51 + // instance objects are visible
1.52 + if (o->klass() != SystemDictionary::Class_klass()) {
1.53 + return true;
1.54 + }
1.55 + if (java_lang_Class::is_primitive(o)) {
1.56 + return true;
1.57 + }
1.58 + // java.lang.Classes are visible
1.59 + Klass* k = java_lang_Class::as_Klass(o);
1.60 + if (k->is_klass()) {
1.61 + // if it's a class for an object, an object array, or
1.62 + // primitive (type) array then it's visible.
1.63 + if (k->oop_is_instance()) {
1.64 + return true;
1.65 + }
1.66 + if (k->oop_is_objArray()) {
1.67 + return true;
1.68 + }
1.69 + if (k->oop_is_typeArray()) {
1.70 + return true;
1.71 + }
1.72 + }
1.73 + return false;
1.74 + }
1.75 + // object arrays are visible if they aren't system object arrays
1.76 + if (o->is_objArray()) {
1.77 + return true;
1.78 + }
1.79 + // type arrays are visible
1.80 + if (o->is_typeArray()) {
1.81 + return true;
1.82 + }
1.83 + // everything else (Method*s, ...) aren't visible
1.84 + return false;
1.85 + }; // end of visible_oop()
1.86 +
1.87 +};
1.88 +
1.89 +#endif // SHARE_VM_SERVICES_SERVICEUTIL_HPP
