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#ifndef ART_RUNTIME_OPENJDKJVMTI_OBJECT_TAGGING_H_
33#define ART_RUNTIME_OPENJDKJVMTI_OBJECT_TAGGING_H_
34
35#include <unordered_map>
36
37#include "base/mutex.h"
38#include "globals.h"
39#include "jvmti.h"
40#include "jvmti_weak_table.h"
41#include "mirror/object.h"
42
43namespace openjdkjvmti {
44
45struct ArtJvmTiEnv;
46class EventHandler;
47
48class ObjectTagTable FINAL : public JvmtiWeakTable<jlong> {
49 public:
50  ObjectTagTable(EventHandler* event_handler, ArtJvmTiEnv* env)
51      : event_handler_(event_handler), jvmti_env_(env) {}
52
53  bool Set(art::mirror::Object* obj, jlong tag) OVERRIDE
54      REQUIRES_SHARED(art::Locks::mutator_lock_)
55      REQUIRES(!allow_disallow_lock_);
56  bool SetLocked(art::mirror::Object* obj, jlong tag) OVERRIDE
57      REQUIRES_SHARED(art::Locks::mutator_lock_)
58      REQUIRES(allow_disallow_lock_);
59
60  jlong GetTagOrZero(art::mirror::Object* obj)
61      REQUIRES_SHARED(art::Locks::mutator_lock_)
62      REQUIRES(!allow_disallow_lock_) {
63    jlong tmp = 0;
64    GetTag(obj, &tmp);
65    return tmp;
66  }
67  jlong GetTagOrZeroLocked(art::mirror::Object* obj)
68      REQUIRES_SHARED(art::Locks::mutator_lock_)
69      REQUIRES(allow_disallow_lock_) {
70    jlong tmp = 0;
71    GetTagLocked(obj, &tmp);
72    return tmp;
73  }
74
75 protected:
76  bool DoesHandleNullOnSweep() OVERRIDE;
77  void HandleNullSweep(jlong tag) OVERRIDE;
78
79 private:
80  EventHandler* event_handler_;
81  ArtJvmTiEnv* jvmti_env_;
82};
83
84}  // namespace openjdkjvmti
85
86#endif  // ART_RUNTIME_OPENJDKJVMTI_OBJECT_TAGGING_H_
87