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-rw-r--r--openjdkjvmti/alloc_manager.h114
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diff --git a/openjdkjvmti/alloc_manager.h b/openjdkjvmti/alloc_manager.h
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-/* Copyright (C) 2019 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_ALLOC_MANAGER_H_
-#define ART_OPENJDKJVMTI_ALLOC_MANAGER_H_
-
-#include <jvmti.h>
-
-#include <atomic>
-
-#include "base/locks.h"
-#include "base/mutex.h"
-#include "gc/allocation_listener.h"
-
-namespace art {
-template <typename T> class MutableHandle;
-template <typename T> class ObjPtr;
-class Thread;
-namespace mirror {
-class Class;
-class Object;
-} // namespace mirror
-} // namespace art
-
-namespace openjdkjvmti {
-
-class AllocationManager;
-
-class JvmtiAllocationListener : public art::gc::AllocationListener {
- public:
- explicit JvmtiAllocationListener(AllocationManager* manager) : manager_(manager) {}
- void ObjectAllocated(art::Thread* self,
- art::ObjPtr<art::mirror::Object>* obj,
- size_t cnt) override REQUIRES_SHARED(art::Locks::mutator_lock_);
- bool HasPreAlloc() const override REQUIRES_SHARED(art::Locks::mutator_lock_);
- void PreObjectAllocated(art::Thread* self,
- art::MutableHandle<art::mirror::Class> type,
- size_t* byte_count) override REQUIRES_SHARED(art::Locks::mutator_lock_);
-
- private:
- AllocationManager* manager_;
-};
-
-class AllocationManager {
- public:
- class AllocationCallback {
- public:
- virtual ~AllocationCallback() {}
- virtual void ObjectAllocated(art::Thread* self,
- art::ObjPtr<art::mirror::Object>* obj,
- size_t byte_count) REQUIRES_SHARED(art::Locks::mutator_lock_) = 0;
- };
-
- AllocationManager();
-
- void SetAllocListener(AllocationCallback* callback);
- void RemoveAllocListener();
-
- static AllocationManager* Get();
-
- void PauseAllocations(art::Thread* self) REQUIRES_SHARED(art::Locks::mutator_lock_);
- void ResumeAllocations(art::Thread* self) REQUIRES_SHARED(art::Locks::mutator_lock_);
-
- void EnableAllocationCallback(art::Thread* self) REQUIRES_SHARED(art::Locks::mutator_lock_);
- void DisableAllocationCallback(art::Thread* self) REQUIRES_SHARED(art::Locks::mutator_lock_);
-
- private:
- template<typename T>
- void PauseForAllocation(art::Thread* self, T msg) REQUIRES_SHARED(art::Locks::mutator_lock_);
- void IncrListenerInstall(art::Thread* self) REQUIRES_SHARED(art::Locks::mutator_lock_);
- void DecrListenerInstall(art::Thread* self) REQUIRES_SHARED(art::Locks::mutator_lock_);
-
- AllocationCallback* callback_ = nullptr;
- uint32_t listener_refcount_ GUARDED_BY(alloc_listener_mutex_) = 0;
- std::atomic<art::Thread*> allocations_paused_thread_ = nullptr;
- std::atomic<bool> callback_enabled_ = false;
- std::unique_ptr<JvmtiAllocationListener> alloc_listener_ = nullptr;
- art::Mutex alloc_listener_mutex_ ACQUIRED_AFTER(art::Locks::user_code_suspension_lock_);
- art::ConditionVariable alloc_pause_cv_;
-
- friend class JvmtiAllocationListener;
-};
-
-} // namespace openjdkjvmti
-
-#endif // ART_OPENJDKJVMTI_ALLOC_MANAGER_H_