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

src/share/vm/gc_implementation/parallelScavenge/cardTableExtension.hpp@f90c822e73f8 (annotated)

src/share/vm/gc_implementation/parallelScavenge/cardTableExtension.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

child 1

2d8a650513c2

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_CARDTABLEEXTENSION_HPP
aoqi@0	26	#define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_CARDTABLEEXTENSION_HPP
aoqi@0	27
aoqi@0	28	#include "memory/cardTableModRefBS.hpp"
aoqi@0	29
aoqi@0	30	class MutableSpace;
aoqi@0	31	class ObjectStartArray;
aoqi@0	32	class PSPromotionManager;
aoqi@0	33	class GCTaskQueue;
aoqi@0	34
aoqi@0	35	class CardTableExtension : public CardTableModRefBS {
aoqi@0	36	private:
aoqi@0	37	// Support methods for resizing the card table.
aoqi@0	38	// resize_commit_uncommit() returns true if the pages were committed or
aoqi@0	39	// uncommitted
aoqi@0	40	bool resize_commit_uncommit(int changed_region, MemRegion new_region);
aoqi@0	41	void resize_update_card_table_entries(int changed_region,
aoqi@0	42	MemRegion new_region);
aoqi@0	43	void resize_update_committed_table(int changed_region, MemRegion new_region);
aoqi@0	44	void resize_update_covered_table(int changed_region, MemRegion new_region);
aoqi@0	45
aoqi@0	46	protected:
aoqi@0	47
aoqi@0	48	static void verify_all_young_refs_precise_helper(MemRegion mr);
aoqi@0	49
aoqi@0	50	public:
aoqi@0	51	enum ExtendedCardValue {
aoqi@0	52	youngergen_card = CardTableModRefBS::CT_MR_BS_last_reserved + 1,
aoqi@0	53	verify_card = CardTableModRefBS::CT_MR_BS_last_reserved + 5
aoqi@0	54	};
aoqi@0	55
aoqi@0	56	CardTableExtension(MemRegion whole_heap, int max_covered_regions) :
aoqi@0	57	CardTableModRefBS(whole_heap, max_covered_regions) { }
aoqi@0	58
aoqi@0	59	// Too risky for the 4/10/02 putback
aoqi@0	60	// BarrierSet::Name kind() { return BarrierSet::CardTableExtension; }
aoqi@0	61
aoqi@0	62	// Scavenge support
aoqi@0	63	void scavenge_contents_parallel(ObjectStartArray* start_array,
aoqi@0	64	MutableSpace* sp,
aoqi@0	65	HeapWord* space_top,
aoqi@0	66	PSPromotionManager* pm,
aoqi@0	67	uint stripe_number,
aoqi@0	68	uint stripe_total);
aoqi@0	69
aoqi@0	70	// Verification
aoqi@0	71	static void verify_all_young_refs_imprecise();
aoqi@0	72	static void verify_all_young_refs_precise();
aoqi@0	73
aoqi@0	74	bool addr_is_marked_imprecise(void *addr);
aoqi@0	75	bool addr_is_marked_precise(void *addr);
aoqi@0	76
aoqi@0	77	void set_card_newgen(void* addr) { jbyte* p = byte_for(addr); *p = verify_card; }
aoqi@0	78
aoqi@0	79	// Testers for entries
aoqi@0	80	static bool card_is_dirty(int value) { return value == dirty_card; }
aoqi@0	81	static bool card_is_newgen(int value) { return value == youngergen_card; }
aoqi@0	82	static bool card_is_clean(int value) { return value == clean_card; }
aoqi@0	83	static bool card_is_verify(int value) { return value == verify_card; }
aoqi@0	84
aoqi@0	85	// Card marking
aoqi@0	86	void inline_write_ref_field_gc(void* field, oop new_val) {
aoqi@0	87	jbyte* byte = byte_for(field);
aoqi@0	88	*byte = youngergen_card;
aoqi@0	89	}
aoqi@0	90
aoqi@0	91	// Adaptive size policy support
aoqi@0	92	// Allows adjustment of the base and size of the covered regions
aoqi@0	93	void resize_covered_region(MemRegion new_region);
aoqi@0	94	// Finds the covered region to resize based on the start address
aoqi@0	95	// of the covered regions.
aoqi@0	96	void resize_covered_region_by_start(MemRegion new_region);
aoqi@0	97	// Finds the covered region to resize based on the end address
aoqi@0	98	// of the covered regions.
aoqi@0	99	void resize_covered_region_by_end(int changed_region, MemRegion new_region);
aoqi@0	100	// Finds the lowest start address of a covered region that is
aoqi@0	101	// previous (i.e., lower index) to the covered region with index "ind".
aoqi@0	102	HeapWord* lowest_prev_committed_start(int ind) const;
aoqi@0	103
aoqi@0	104	#ifdef ASSERT
aoqi@0	105
aoqi@0	106	bool is_valid_card_address(jbyte* addr) {
aoqi@0	107	return (addr >= _byte_map) && (addr < _byte_map + _byte_map_size);
aoqi@0	108	}
aoqi@0	109
aoqi@0	110	#endif // ASSERT
aoqi@0	111	};
aoqi@0	112
aoqi@0	113	#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_CARDTABLEEXTENSION_HPP