Mon, 12 Aug 2019 18:30:40 +0300
8223147: JFR Backport
8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens
1 /*
2 * Copyright (c) 2003, 2012, 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 */
25 #ifndef SHARE_VM_SERVICES_SERVICEUTIL_HPP
26 #define SHARE_VM_SERVICES_SERVICEUTIL_HPP
28 #include "classfile/systemDictionary.hpp"
29 #include "oops/objArrayOop.hpp"
31 //
32 // Serviceability utility functions.
33 // (Shared by MM and JVMTI).
34 //
35 class ServiceUtil : public AllStatic {
36 public:
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 }
46 // instance
47 if (o->is_instance()) {
48 // instance objects are visible
49 if (o->klass() != SystemDictionary::Class_klass()) {
50 return true;
51 }
52 if (java_lang_Class::is_primitive(o)) {
53 return true;
54 }
55 // java.lang.Classes are visible
56 Klass* k = java_lang_Class::as_Klass(o);
57 if (k->is_klass()) {
58 // if it's a class for an object, an object array, or
59 // primitive (type) array then it's visible.
60 if (k->oop_is_instance()) {
61 return true;
62 }
63 if (k->oop_is_objArray()) {
64 return true;
65 }
66 if (k->oop_is_typeArray()) {
67 return true;
68 }
69 }
70 return false;
71 }
72 // object arrays are visible if they aren't system object arrays
73 if (o->is_objArray()) {
74 return true;
75 }
76 // type arrays are visible
77 if (o->is_typeArray()) {
78 return true;
79 }
80 // everything else (Method*s, ...) aren't visible
81 return false;
82 }; // end of visible_oop()
84 };
86 #endif // SHARE_VM_SERVICES_SERVICEUTIL_HPP