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