1 /* Copyright (C) 2016 The Android Open Source Project
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This file implements interfaces from the file jvmti.h. This implementation
5 * is licensed under the same terms as the file jvmti.h. The
6 * copyright and license information for the file jvmti.h follows.
7 *
8 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
9 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
10 *
11 * This code is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 only, as
13 * published by the Free Software Foundation. Oracle designates this
14 * particular file as subject to the "Classpath" exception as provided
15 * by Oracle in the LICENSE file that accompanied this code.
16 *
17 * This code is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 * version 2 for more details (a copy is included in the LICENSE file that
21 * accompanied this code).
22 *
23 * You should have received a copy of the GNU General Public License version
24 * 2 along with this work; if not, write to the Free Software Foundation,
25 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
26 *
27 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
28 * or visit www.oracle.com if you need additional information or have any
29 * questions.
30 */
31
32 #include "object_tagging.h"
33
34 #include <limits>
35
36 #include "art_jvmti.h"
37 #include "events-inl.h"
38 #include "jvmti_weak_table-inl.h"
39 #include "mirror/object-inl.h"
40
41 namespace openjdkjvmti {
42
43 // Instantiate for jlong = JVMTI tags.
44 template class JvmtiWeakTable<jlong>;
45
Allow()46 void ObjectTagTable::Allow() {
47 JvmtiWeakTable<jlong>::Allow();
48 SendDelayedFreeEvents();
49 }
50
Broadcast(bool broadcast_for_checkpoint)51 void ObjectTagTable::Broadcast(bool broadcast_for_checkpoint) {
52 JvmtiWeakTable<jlong>::Broadcast(broadcast_for_checkpoint);
53 if (!broadcast_for_checkpoint) {
54 SendDelayedFreeEvents();
55 }
56 }
57
SendDelayedFreeEvents()58 void ObjectTagTable::SendDelayedFreeEvents() {
59 std::vector<jlong> to_send;
60 {
61 art::MutexLock mu(art::Thread::Current(), lock_);
62 to_send.swap(null_tags_);
63 }
64 for (jlong t : to_send) {
65 SendSingleFreeEvent(t);
66 }
67 }
68
SendSingleFreeEvent(jlong tag)69 void ObjectTagTable::SendSingleFreeEvent(jlong tag) {
70 event_handler_->DispatchEventOnEnv<ArtJvmtiEvent::kObjectFree>(
71 jvmti_env_, art::Thread::Current(), tag);
72 }
73
Set(art::ObjPtr<art::mirror::Object> obj,jlong new_tag)74 bool ObjectTagTable::Set(art::ObjPtr<art::mirror::Object> obj, jlong new_tag) {
75 if (new_tag == 0) {
76 jlong tmp;
77 return Remove(obj, &tmp);
78 }
79 return JvmtiWeakTable<jlong>::Set(obj, new_tag);
80 }
81
SetLocked(art::ObjPtr<art::mirror::Object> obj,jlong new_tag)82 bool ObjectTagTable::SetLocked(art::ObjPtr<art::mirror::Object> obj, jlong new_tag) {
83 if (new_tag == 0) {
84 jlong tmp;
85 return RemoveLocked(obj, &tmp);
86 }
87 return JvmtiWeakTable<jlong>::SetLocked(obj, new_tag);
88 }
89
DoesHandleNullOnSweep()90 bool ObjectTagTable::DoesHandleNullOnSweep() {
91 return event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kObjectFree);
92 }
93
HandleNullSweep(jlong tag)94 void ObjectTagTable::HandleNullSweep(jlong tag) {
95 art::MutexLock mu(art::Thread::Current(), lock_);
96 null_tags_.push_back(tag);
97 }
98
99 } // namespace openjdkjvmti
100