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src/share/vm/services/serviceUtil.hpp@710a3c8b516e (annotated)
src/share/vm/services/serviceUtil.hpp
Tue, 08 Aug 2017 15:57:29 +0800
- author
- aoqi
- date
- Tue, 08 Aug 2017 15:57:29 +0800
- changeset 6876
- 710a3c8b516e
- parent 4278
- 070d523b96a7
- parent 0
- f90c822e73f8
- permissions
- -rw-r--r--
merge
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef SHARE_VM_SERVICES_SERVICEUTIL_HPP |
| aoqi@0 | 26 | #define SHARE_VM_SERVICES_SERVICEUTIL_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "classfile/systemDictionary.hpp" |
| aoqi@0 | 29 | #include "oops/objArrayOop.hpp" |
| aoqi@0 | 30 | |
| aoqi@0 | 31 | // |
| aoqi@0 | 32 | // Serviceability utility functions. |
| aoqi@0 | 33 | // (Shared by MM and JVMTI). |
| aoqi@0 | 34 | // |
| aoqi@0 | 35 | class ServiceUtil : public AllStatic { |
| aoqi@0 | 36 | public: |
| aoqi@0 | 37 | |
| aoqi@0 | 38 | // Return true if oop represents an object that is "visible" |
| aoqi@0 | 39 | // to the java world. |
| aoqi@0 | 40 | static inline bool visible_oop(oop o) { |
| aoqi@0 | 41 | // the sentinel for deleted handles isn't visible |
| aoqi@0 | 42 | if (o == JNIHandles::deleted_handle()) { |
| aoqi@0 | 43 | return false; |
| aoqi@0 | 44 | } |
| aoqi@0 | 45 | |
| aoqi@0 | 46 | // instance |
| aoqi@0 | 47 | if (o->is_instance()) { |
| aoqi@0 | 48 | // instance objects are visible |
| aoqi@0 | 49 | if (o->klass() != SystemDictionary::Class_klass()) { |
| aoqi@0 | 50 | return true; |
| aoqi@0 | 51 | } |
| aoqi@0 | 52 | if (java_lang_Class::is_primitive(o)) { |
| aoqi@0 | 53 | return true; |
| aoqi@0 | 54 | } |
| aoqi@0 | 55 | // java.lang.Classes are visible |
| aoqi@0 | 56 | Klass* k = java_lang_Class::as_Klass(o); |
| aoqi@0 | 57 | if (k->is_klass()) { |
| aoqi@0 | 58 | // if it's a class for an object, an object array, or |
| aoqi@0 | 59 | // primitive (type) array then it's visible. |
| aoqi@0 | 60 | if (k->oop_is_instance()) { |
| aoqi@0 | 61 | return true; |
| aoqi@0 | 62 | } |
| aoqi@0 | 63 | if (k->oop_is_objArray()) { |
| aoqi@0 | 64 | return true; |
| aoqi@0 | 65 | } |
| aoqi@0 | 66 | if (k->oop_is_typeArray()) { |
| aoqi@0 | 67 | return true; |
| aoqi@0 | 68 | } |
| aoqi@0 | 69 | } |
| aoqi@0 | 70 | return false; |
| aoqi@0 | 71 | } |
| aoqi@0 | 72 | // object arrays are visible if they aren't system object arrays |
| aoqi@0 | 73 | if (o->is_objArray()) { |
| aoqi@0 | 74 | return true; |
| aoqi@0 | 75 | } |
| aoqi@0 | 76 | // type arrays are visible |
| aoqi@0 | 77 | if (o->is_typeArray()) { |
| aoqi@0 | 78 | return true; |
| aoqi@0 | 79 | } |
| aoqi@0 | 80 | // everything else (Method*s, ...) aren't visible |
| aoqi@0 | 81 | return false; |
| aoqi@0 | 82 | }; // end of visible_oop() |
| aoqi@0 | 83 | |
| aoqi@0 | 84 | }; |
| aoqi@0 | 85 | |
| aoqi@0 | 86 | #endif // SHARE_VM_SERVICES_SERVICEUTIL_HPP |
