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) 2011, 2013, 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_OOPS_INSTANCEMIRRORKLASS_HPP
26 #define SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP
28 #include "classfile/systemDictionary.hpp"
29 #include "oops/instanceKlass.hpp"
30 #include "runtime/handles.hpp"
31 #include "utilities/macros.hpp"
33 // An InstanceMirrorKlass is a specialized InstanceKlass for
34 // java.lang.Class instances. These instances are special because
35 // they contain the static fields of the class in addition to the
36 // normal fields of Class. This means they are variable sized
37 // instances and need special logic for computing their size and for
38 // iteration of their oops.
41 class InstanceMirrorKlass: public InstanceKlass {
42 friend class VMStructs;
43 friend class InstanceKlass;
45 private:
46 static int _offset_of_static_fields;
48 // Constructor
49 InstanceMirrorKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)
50 : InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}
52 public:
53 InstanceMirrorKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
54 // Type testing
55 bool oop_is_instanceMirror() const { return true; }
57 // Casting from Klass*
58 static InstanceMirrorKlass* cast(Klass* k) {
59 assert(k->oop_is_instanceMirror(), "cast to InstanceMirrorKlass");
60 return (InstanceMirrorKlass*) k;
61 }
63 // Returns the size of the instance including the extra static fields.
64 virtual int oop_size(oop obj) const;
66 // Static field offset is an offset into the Heap, should be converted by
67 // based on UseCompressedOop for traversal
68 static HeapWord* start_of_static_fields(oop obj) {
69 return (HeapWord*)(cast_from_oop<intptr_t>(obj) + offset_of_static_fields());
70 }
72 static void init_offset_of_static_fields() {
73 // Cache the offset of the static fields in the Class instance
74 assert(_offset_of_static_fields == 0, "once");
75 _offset_of_static_fields = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->size_helper() << LogHeapWordSize;
76 }
78 static int offset_of_static_fields() {
79 return _offset_of_static_fields;
80 }
82 int compute_static_oop_field_count(oop obj);
84 // Given a Klass return the size of the instance
85 int instance_size(KlassHandle k);
87 // allocation
88 instanceOop allocate_instance(KlassHandle k, TRAPS);
90 // Garbage collection
91 int oop_adjust_pointers(oop obj);
92 void oop_follow_contents(oop obj);
94 // Parallel Scavenge and Parallel Old
95 PARALLEL_GC_DECLS
97 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
98 return oop_oop_iterate_v(obj, blk);
99 }
100 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
101 return oop_oop_iterate_v_m(obj, blk, mr);
102 }
104 #define InstanceMirrorKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
105 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
106 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);
108 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_DECL)
109 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_DECL)
111 #if INCLUDE_ALL_GCS
112 #define InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
113 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
115 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
116 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
117 #endif // INCLUDE_ALL_GCS
118 };
120 #endif // SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP