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/*
* Copyright (c) 2017, 2022, 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.
*
* 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 SHARE_GC_G1_G1FULLGCMARKER_HPP
#define SHARE_GC_G1_G1FULLGCMARKER_HPP
#include "gc/g1/g1FullGCOopClosures.hpp"
#include "gc/g1/g1RegionMarkStatsCache.hpp"
#include "gc/shared/preservedMarks.hpp"
#include "gc/shared/stringdedup/stringDedup.hpp"
#include "gc/shared/taskqueue.hpp"
#include "memory/iterator.hpp"
#include "oops/markWord.hpp"
#include "oops/oop.hpp"
#include "runtime/timer.hpp"
#include "utilities/chunkedList.hpp"
#include "utilities/growableArray.hpp"
#include "utilities/stack.hpp"
typedef OverflowTaskQueue<oop, mtGC> OopQueue;
typedef OverflowTaskQueue<ObjArrayTask, mtGC> ObjArrayTaskQueue;
typedef GenericTaskQueueSet<OopQueue, mtGC> OopQueueSet;
typedef GenericTaskQueueSet<ObjArrayTaskQueue, mtGC> ObjArrayTaskQueueSet;
class G1CMBitMap;
class G1FullCollector;
class TaskTerminator;
class G1FullGCMarker : public CHeapObj<mtGC> {
G1FullCollector* _collector;
uint _worker_id;
// Backing mark bitmap
G1CMBitMap* _bitmap;
// Mark stack
OopQueue _oop_stack;
ObjArrayTaskQueue _objarray_stack;
PreservedMarks* _preserved_stack;
// Marking closures
G1MarkAndPushClosure _mark_closure;
G1VerifyOopClosure _verify_closure;
G1FollowStackClosure _stack_closure;
CLDToOopClosure _cld_closure;
StringDedup::Requests _string_dedup_requests;
G1RegionMarkStatsCache _mark_stats_cache;
inline bool is_empty();
inline void push_objarray(oop obj, size_t index);
inline bool mark_object(oop obj);
// Marking helpers
inline void follow_object(oop obj);
inline void follow_array(objArrayOop array);
inline void follow_array_chunk(objArrayOop array, int index);
inline void publish_and_drain_oop_tasks();
// Try to publish all contents from the objArray task queue overflow stack to
// the shared objArray stack.
// Returns true and a valid task if there has not been enough space in the shared
// objArray stack, otherwise returns false and the task is invalid.
inline bool publish_or_pop_objarray_tasks(ObjArrayTask& task);
public:
G1FullGCMarker(G1FullCollector* collector,
uint worker_id,
PreservedMarks* preserved_stack,
G1RegionMarkStats* mark_stats);
~G1FullGCMarker();
// Stack getters
OopQueue* oop_stack() { return &_oop_stack; }
ObjArrayTaskQueue* objarray_stack() { return &_objarray_stack; }
PreservedMarks* preserved_stack() { return _preserved_stack; }
// Marking entry points
template <class T> inline void mark_and_push(T* p);
inline void follow_klass(Klass* k);
inline void follow_cld(ClassLoaderData* cld);
inline void follow_marking_stacks();
void complete_marking(OopQueueSet* oop_stacks,
ObjArrayTaskQueueSet* array_stacks,
TaskTerminator* terminator);
// Closure getters
CLDToOopClosure* cld_closure() { return &_cld_closure; }
G1MarkAndPushClosure* mark_closure() { return &_mark_closure; }
G1FollowStackClosure* stack_closure() { return &_stack_closure; }
// Flush live bytes to regions
void flush_mark_stats_cache();
};
#endif // SHARE_GC_G1_G1FULLGCMARKER_HPP
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