1 /*
2 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 //
26 // Serviceability utility functions.
27 // (Shared by MM and JVMTI).
28 //
29 class ServiceUtil : public AllStatic {
30 public:
31
32 // Return true if oop represents an object that is "visible"
33 // to the java world.
34 static inline bool visible_oop(oop o) {
35 // the sentinel for deleted handles isn't visible
36 if (o == JNIHandles::deleted_handle()) {
37 return false;
38 }
39
40 // ignore KlassKlass
41 if (o->is_klass()) {
42 return false;
43 }
44
70 return false;
71 }
72 // object arrays are visible if they aren't system object arrays
73 if (o->is_objArray()) {
74 objArrayOop array = (objArrayOop)o;
75 if (array->klass() != Universe::systemObjArrayKlassObj()) {
76 return true;
77 } else {
78 return false;
79 }
80 }
81 // type arrays are visible
82 if (o->is_typeArray()) {
83 return true;
84 }
85 // everything else (methodOops, ...) aren't visible
86 return false;
87 }; // end of visible_oop()
88
89 };
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1 /*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_SERVICES_SERVICEUTIL_HPP
26 #define SHARE_VM_SERVICES_SERVICEUTIL_HPP
27
28 #include "classfile/systemDictionary.hpp"
29 #include "oops/objArrayOop.hpp"
30
31 //
32 // Serviceability utility functions.
33 // (Shared by MM and JVMTI).
34 //
35 class ServiceUtil : public AllStatic {
36 public:
37
38 // Return true if oop represents an object that is "visible"
39 // to the java world.
40 static inline bool visible_oop(oop o) {
41 // the sentinel for deleted handles isn't visible
42 if (o == JNIHandles::deleted_handle()) {
43 return false;
44 }
45
46 // ignore KlassKlass
47 if (o->is_klass()) {
48 return false;
49 }
50
76 return false;
77 }
78 // object arrays are visible if they aren't system object arrays
79 if (o->is_objArray()) {
80 objArrayOop array = (objArrayOop)o;
81 if (array->klass() != Universe::systemObjArrayKlassObj()) {
82 return true;
83 } else {
84 return false;
85 }
86 }
87 // type arrays are visible
88 if (o->is_typeArray()) {
89 return true;
90 }
91 // everything else (methodOops, ...) aren't visible
92 return false;
93 }; // end of visible_oop()
94
95 };
96
97 #endif // SHARE_VM_SERVICES_SERVICEUTIL_HPP
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