| /* Copyright (C) 2016 The Android Open Source Project |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This file implements interfaces from the file jvmti.h. This implementation |
| * is licensed under the same terms as the file jvmti.h. The |
| * copyright and license information for the file jvmti.h follows. |
| * |
| * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #ifndef ART_OPENJDKJVMTI_OBJECT_TAGGING_H_ |
| #define ART_OPENJDKJVMTI_OBJECT_TAGGING_H_ |
| |
| #include <unordered_map> |
| |
| #include "base/globals.h" |
| #include "base/mutex.h" |
| #include "jvmti.h" |
| #include "jvmti_weak_table.h" |
| #include "mirror/object.h" |
| |
| namespace openjdkjvmti { |
| |
| struct ArtJvmTiEnv; |
| class EventHandler; |
| |
| class ObjectTagTable final : public JvmtiWeakTable<jlong> { |
| public: |
| ObjectTagTable(EventHandler* event_handler, ArtJvmTiEnv* env) |
| : lock_("Object tag table lock", art::LockLevel::kGenericBottomLock), |
| event_handler_(event_handler), |
| jvmti_env_(env) {} |
| |
| // Denotes that weak-refs are visible on all threads. Used by semi-space. |
| void Allow() override |
| REQUIRES_SHARED(art::Locks::mutator_lock_) |
| REQUIRES(!allow_disallow_lock_); |
| // Used by cms and the checkpoint system. |
| void Broadcast(bool broadcast_for_checkpoint) override |
| REQUIRES_SHARED(art::Locks::mutator_lock_) |
| REQUIRES(!allow_disallow_lock_); |
| |
| bool Set(art::ObjPtr<art::mirror::Object> obj, jlong tag) override |
| REQUIRES_SHARED(art::Locks::mutator_lock_) |
| REQUIRES(!allow_disallow_lock_); |
| bool SetLocked(art::ObjPtr<art::mirror::Object> obj, jlong tag) override |
| REQUIRES_SHARED(art::Locks::mutator_lock_) |
| REQUIRES(allow_disallow_lock_); |
| |
| jlong GetTagOrZero(art::ObjPtr<art::mirror::Object> obj) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) |
| REQUIRES(!allow_disallow_lock_) { |
| jlong tmp = 0; |
| GetTag(obj, &tmp); |
| return tmp; |
| } |
| jlong GetTagOrZeroLocked(art::ObjPtr<art::mirror::Object> obj) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) |
| REQUIRES(allow_disallow_lock_) { |
| jlong tmp = 0; |
| GetTagLocked(obj, &tmp); |
| return tmp; |
| } |
| |
| protected: |
| bool DoesHandleNullOnSweep() override; |
| void HandleNullSweep(jlong tag) override; |
| |
| private: |
| void SendDelayedFreeEvents() |
| REQUIRES_SHARED(art::Locks::mutator_lock_) |
| REQUIRES(!allow_disallow_lock_); |
| |
| void SendSingleFreeEvent(jlong tag) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) |
| REQUIRES(!allow_disallow_lock_, !lock_); |
| |
| art::Mutex lock_ BOTTOM_MUTEX_ACQUIRED_AFTER; |
| std::vector<jlong> null_tags_ GUARDED_BY(lock_); |
| EventHandler* event_handler_; |
| ArtJvmTiEnv* jvmti_env_; |
| }; |
| |
| } // namespace openjdkjvmti |
| |
| #endif // ART_OPENJDKJVMTI_OBJECT_TAGGING_H_ |