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) 1997, 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_INSTANCEREFKLASS_HPP
26 #define SHARE_VM_OOPS_INSTANCEREFKLASS_HPP
28 #include "oops/instanceKlass.hpp"
29 #include "utilities/macros.hpp"
31 // An InstanceRefKlass is a specialized InstanceKlass for Java
32 // classes that are subclasses of java/lang/ref/Reference.
33 //
34 // These classes are used to implement soft/weak/final/phantom
35 // references and finalization, and need special treatment by the
36 // garbage collector.
37 //
38 // During GC discovered reference objects are added (chained) to one
39 // of the four lists below, depending on the type of reference.
40 // The linked occurs through the next field in class java/lang/ref/Reference.
41 //
42 // Afterwards, the discovered references are processed in decreasing
43 // order of reachability. Reference objects eligible for notification
44 // are linked to the static pending_list in class java/lang/ref/Reference,
45 // and the pending list lock object in the same class is notified.
48 class InstanceRefKlass: public InstanceKlass {
49 friend class InstanceKlass;
51 // Constructor
52 InstanceRefKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)
53 : InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}
55 public:
56 InstanceRefKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
57 // Type testing
58 bool oop_is_instanceRef() const { return true; }
60 // Casting from Klass*
61 static InstanceRefKlass* cast(Klass* k) {
62 assert(k->oop_is_instanceRef(), "cast to InstanceRefKlass");
63 return (InstanceRefKlass*) k;
64 }
66 // Garbage collection
67 int oop_adjust_pointers(oop obj);
68 void oop_follow_contents(oop obj);
70 // Parallel Scavenge and Parallel Old
71 PARALLEL_GC_DECLS
73 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
74 return oop_oop_iterate_v(obj, blk);
75 }
76 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
77 return oop_oop_iterate_v_m(obj, blk, mr);
78 }
80 #define InstanceRefKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
81 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
82 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);
84 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DECL)
85 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DECL)
87 #if INCLUDE_ALL_GCS
88 #define InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
89 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
91 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
92 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
93 #endif // INCLUDE_ALL_GCS
95 static void release_and_notify_pending_list_lock(BasicLock *pending_list_basic_lock);
96 static void acquire_pending_list_lock(BasicLock *pending_list_basic_lock);
97 static bool owns_pending_list_lock(JavaThread* thread);
99 // Update non-static oop maps so 'referent', 'nextPending' and
100 // 'discovered' will look like non-oops
101 static void update_nonstatic_oop_maps(Klass* k);
103 public:
104 // Verification
105 void oop_verify_on(oop obj, outputStream* st);
106 };
108 #endif // SHARE_VM_OOPS_INSTANCEREFKLASS_HPP