• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/gc_implementation/parNew/parOopClosures.hpp@2e6857353b2c (annotated)

src/share/vm/gc_implementation/parNew/parOopClosures.hpp

Thu, 04 Oct 2012 10:04:13 -0700

author

johnc

date

Thu, 04 Oct 2012 10:04:13 -0700

changeset 4130

2e6857353b2c

parent 4037

da91efe96a93

child 5515

9766f73e770d

permissions

-rw-r--r--

8000311: G1: ParallelGCThreads==0 broken
Summary: Divide by zero error, if ParallelGCThreads is 0, when adjusting the PLAB size.
Reviewed-by: jmasa, jcoomes

duke@435	1	/*
coleenp@4037	2	* Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP
stefank@2314	26	#define SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP
stefank@2314	27
stefank@2314	28	#include "memory/genOopClosures.hpp"
stefank@2314	29
duke@435	30	// Closures for ParNewGeneration
duke@435	31
duke@435	32	class ParScanThreadState;
duke@435	33	class ParNewGeneration;
jcoomes@2020	34	typedef Padded<OopTaskQueue> ObjToScanQueue;
zgu@3900	35	typedef GenericTaskQueueSet<ObjToScanQueue, mtGC> ObjToScanQueueSet;
duke@435	36	class ParallelTaskTerminator;
duke@435	37
coleenp@4037	38	class ParScanClosure: public OopsInKlassOrGenClosure {
coleenp@548	39	protected:
duke@435	40	ParScanThreadState* _par_scan_state;
coleenp@548	41	ParNewGeneration* _g;
coleenp@548	42	HeapWord* _boundary;
coleenp@548	43	template <class T> void inline par_do_barrier(T* p);
coleenp@548	44	template <class T> void inline do_oop_work(T* p,
coleenp@548	45	bool gc_barrier,
coleenp@548	46	bool root_scan);
coleenp@548	47	public:
duke@435	48	ParScanClosure(ParNewGeneration* g, ParScanThreadState* par_scan_state);
duke@435	49	};
duke@435	50
duke@435	51	class ParScanWithBarrierClosure: public ParScanClosure {
coleenp@548	52	public:
duke@435	53	ParScanWithBarrierClosure(ParNewGeneration* g,
duke@435	54	ParScanThreadState* par_scan_state) :
duke@435	55	ParScanClosure(g, par_scan_state) {}
coleenp@548	56	virtual void do_oop(oop* p);
coleenp@548	57	virtual void do_oop(narrowOop* p);
coleenp@548	58	inline void do_oop_nv(oop* p);
coleenp@548	59	inline void do_oop_nv(narrowOop* p);
duke@435	60	};
duke@435	61
duke@435	62	class ParScanWithoutBarrierClosure: public ParScanClosure {
coleenp@548	63	public:
duke@435	64	ParScanWithoutBarrierClosure(ParNewGeneration* g,
duke@435	65	ParScanThreadState* par_scan_state) :
duke@435	66	ParScanClosure(g, par_scan_state) {}
coleenp@548	67	virtual void do_oop(oop* p);
coleenp@548	68	virtual void do_oop(narrowOop* p);
coleenp@548	69	inline void do_oop_nv(oop* p);
coleenp@548	70	inline void do_oop_nv(narrowOop* p);
duke@435	71	};
duke@435	72
duke@435	73	class ParRootScanWithBarrierTwoGensClosure: public ParScanClosure {
coleenp@548	74	public:
duke@435	75	ParRootScanWithBarrierTwoGensClosure(ParNewGeneration* g,
duke@435	76	ParScanThreadState* par_scan_state) :
duke@435	77	ParScanClosure(g, par_scan_state) {}
coleenp@548	78	virtual void do_oop(oop* p);
coleenp@548	79	virtual void do_oop(narrowOop* p);
duke@435	80	};
duke@435	81
duke@435	82	class ParRootScanWithoutBarrierClosure: public ParScanClosure {
coleenp@548	83	public:
duke@435	84	ParRootScanWithoutBarrierClosure(ParNewGeneration* g,
duke@435	85	ParScanThreadState* par_scan_state) :
duke@435	86	ParScanClosure(g, par_scan_state) {}
coleenp@548	87	virtual void do_oop(oop* p);
coleenp@548	88	virtual void do_oop(narrowOop* p);
duke@435	89	};
duke@435	90
duke@435	91	class ParScanWeakRefClosure: public ScanWeakRefClosure {
coleenp@548	92	protected:
duke@435	93	ParScanThreadState* _par_scan_state;
coleenp@548	94	template <class T> inline void do_oop_work(T* p);
coleenp@548	95	public:
duke@435	96	ParScanWeakRefClosure(ParNewGeneration* g,
duke@435	97	ParScanThreadState* par_scan_state);
coleenp@548	98	virtual void do_oop(oop* p);
coleenp@548	99	virtual void do_oop(narrowOop* p);
coleenp@548	100	inline void do_oop_nv(oop* p);
coleenp@548	101	inline void do_oop_nv(narrowOop* p);
duke@435	102	};
duke@435	103
duke@435	104	class ParEvacuateFollowersClosure: public VoidClosure {
coleenp@548	105	private:
duke@435	106	ParScanThreadState* _par_scan_state;
duke@435	107	ParScanThreadState* par_scan_state() { return _par_scan_state; }
duke@435	108
duke@435	109	// We want to preserve the specific types here (rather than "OopClosure")
duke@435	110	// for later de-virtualization of do_oop calls.
duke@435	111	ParScanWithoutBarrierClosure* _to_space_closure;
duke@435	112	ParScanWithoutBarrierClosure* to_space_closure() {
duke@435	113	return _to_space_closure;
duke@435	114	}
duke@435	115	ParRootScanWithoutBarrierClosure* _to_space_root_closure;
duke@435	116	ParRootScanWithoutBarrierClosure* to_space_root_closure() {
duke@435	117	return _to_space_root_closure;
duke@435	118	}
duke@435	119
duke@435	120	ParScanWithBarrierClosure* _old_gen_closure;
duke@435	121	ParScanWithBarrierClosure* old_gen_closure () {
duke@435	122	return _old_gen_closure;
duke@435	123	}
duke@435	124	ParRootScanWithBarrierTwoGensClosure* _old_gen_root_closure;
duke@435	125	ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure () {
duke@435	126	return _old_gen_root_closure;
duke@435	127	}
duke@435	128
duke@435	129	ParNewGeneration* _par_gen;
duke@435	130	ParNewGeneration* par_gen() { return _par_gen; }
duke@435	131
duke@435	132	ObjToScanQueueSet* _task_queues;
duke@435	133	ObjToScanQueueSet* task_queues() { return _task_queues; }
duke@435	134
duke@435	135	ParallelTaskTerminator* _terminator;
duke@435	136	ParallelTaskTerminator* terminator() { return _terminator; }
coleenp@548	137	public:
duke@435	138	ParEvacuateFollowersClosure(
duke@435	139	ParScanThreadState* par_scan_state_,
duke@435	140	ParScanWithoutBarrierClosure* to_space_closure_,
duke@435	141	ParScanWithBarrierClosure* old_gen_closure_,
duke@435	142	ParRootScanWithoutBarrierClosure* to_space_root_closure_,
duke@435	143	ParNewGeneration* par_gen_,
duke@435	144	ParRootScanWithBarrierTwoGensClosure* old_gen_root_closure_,
duke@435	145	ObjToScanQueueSet* task_queues_,
duke@435	146	ParallelTaskTerminator* terminator_);
coleenp@548	147	virtual void do_void();
duke@435	148	};
stefank@2314	149
stefank@2314	150	#endif // SHARE_VM_GC_IMPLEMENTATION_PARNEW_PAROOPCLOSURES_HPP