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src/share/vm/gc_implementation/parallelScavenge/psMarkSweep.hpp@da91efe96a93 (annotated)

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

Sat, 01 Sep 2012 13:25:18 -0400

author

coleenp

date

Sat, 01 Sep 2012 13:25:18 -0400

changeset 4037

da91efe96a93

parent 3540

ab4422d0ed59

child 5011

a08c80e9e1e5

permissions

-rw-r--r--

6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

duke@435	1	/*
jcoomes@3540	2	* Copyright (c) 2001, 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_PARALLELSCAVENGE_PSMARKSWEEP_HPP
stefank@2314	26	#define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP
stefank@2314	27
stefank@2314	28	#include "gc_implementation/shared/collectorCounters.hpp"
stefank@2314	29	#include "gc_implementation/shared/markSweep.inline.hpp"
stefank@2314	30	#include "utilities/stack.hpp"
stefank@2314	31
duke@435	32	class PSAdaptiveSizePolicy;
duke@435	33	class PSYoungGen;
duke@435	34	class PSOldGen;
duke@435	35
duke@435	36	class PSMarkSweep : public MarkSweep {
duke@435	37	private:
duke@435	38	static elapsedTimer _accumulated_time;
duke@435	39	static jlong _time_of_last_gc; // ms
duke@435	40	static CollectorCounters* _counters;
duke@435	41
duke@435	42	// Closure accessors
duke@435	43	static OopClosure* mark_and_push_closure() { return &MarkSweep::mark_and_push_closure; }
coleenp@4037	44	static KlassClosure* follow_klass_closure() { return &MarkSweep::follow_klass_closure; }
duke@435	45	static VoidClosure* follow_stack_closure() { return (VoidClosure*)&MarkSweep::follow_stack_closure; }
duke@435	46	static OopClosure* adjust_pointer_closure() { return (OopClosure*)&MarkSweep::adjust_pointer_closure; }
duke@435	47	static OopClosure* adjust_root_pointer_closure() { return (OopClosure*)&MarkSweep::adjust_root_pointer_closure; }
coleenp@4037	48	static KlassClosure* adjust_klass_closure() { return &MarkSweep::adjust_klass_closure; }
duke@435	49	static BoolObjectClosure* is_alive_closure() { return (BoolObjectClosure*)&MarkSweep::is_alive; }
duke@435	50
duke@435	51	debug_only(public:) // Used for PSParallelCompact debugging
duke@435	52	// Mark live objects
duke@435	53	static void mark_sweep_phase1(bool clear_all_softrefs);
duke@435	54	// Calculate new addresses
duke@435	55	static void mark_sweep_phase2();
duke@435	56	debug_only(private:) // End used for PSParallelCompact debugging
duke@435	57	// Update pointers
duke@435	58	static void mark_sweep_phase3();
duke@435	59	// Move objects to new positions
duke@435	60	static void mark_sweep_phase4();
duke@435	61
duke@435	62	debug_only(public:) // Used for PSParallelCompact debugging
duke@435	63	// Temporary data structures for traversal and storing/restoring marks
duke@435	64	static void allocate_stacks();
duke@435	65	static void deallocate_stacks();
duke@435	66	static void set_ref_processor(ReferenceProcessor* rp) { // delete this method
duke@435	67	_ref_processor = rp;
duke@435	68	}
duke@435	69	debug_only(private:) // End used for PSParallelCompact debugging
duke@435	70
duke@435	71	// If objects are left in eden after a collection, try to move the boundary
duke@435	72	// and absorb them into the old gen. Returns true if eden was emptied.
duke@435	73	static bool absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
duke@435	74	PSYoungGen* young_gen,
duke@435	75	PSOldGen* old_gen);
duke@435	76
duke@435	77	// Reset time since last full gc
duke@435	78	static void reset_millis_since_last_gc();
duke@435	79
duke@435	80	public:
duke@435	81	static void invoke(bool clear_all_softrefs);
jcoomes@3540	82	static bool invoke_no_policy(bool clear_all_softrefs);
duke@435	83
duke@435	84	static void initialize();
duke@435	85
duke@435	86	// Public accessors
duke@435	87	static elapsedTimer* accumulated_time() { return &_accumulated_time; }
duke@435	88	static CollectorCounters* counters() { return _counters; }
duke@435	89
duke@435	90	// Time since last full gc (in milliseconds)
duke@435	91	static jlong millis_since_last_gc();
duke@435	92	};
stefank@2314	93
stefank@2314	94	#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP