jdk-sandbox: hotspot/src/share/vm/gc_implementation/shared/markSweep.inline.hpp@21d113ecbf6a (annotated)

1 489c9b5090e2 Initial load duke parents: diff changeset	1	/*
489c9b5090e2 Initial load duke parents: diff changeset	2	* Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved.
489c9b5090e2 Initial load duke parents: diff changeset	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
489c9b5090e2 Initial load duke parents: diff changeset	4	*
489c9b5090e2 Initial load duke parents: diff changeset	5	* This code is free software; you can redistribute it and/or modify it
489c9b5090e2 Initial load duke parents: diff changeset	6	* under the terms of the GNU General Public License version 2 only, as
489c9b5090e2 Initial load duke parents: diff changeset	7	* published by the Free Software Foundation.
489c9b5090e2 Initial load duke parents: diff changeset	8	*
489c9b5090e2 Initial load duke parents: diff changeset	9	* This code is distributed in the hope that it will be useful, but WITHOUT
489c9b5090e2 Initial load duke parents: diff changeset	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
489c9b5090e2 Initial load duke parents: diff changeset	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
489c9b5090e2 Initial load duke parents: diff changeset	12	* version 2 for more details (a copy is included in the LICENSE file that
489c9b5090e2 Initial load duke parents: diff changeset	13	* accompanied this code).
489c9b5090e2 Initial load duke parents: diff changeset	14	*
489c9b5090e2 Initial load duke parents: diff changeset	15	* You should have received a copy of the GNU General Public License version
489c9b5090e2 Initial load duke parents: diff changeset	16	* 2 along with this work; if not, write to the Free Software Foundation,
489c9b5090e2 Initial load duke parents: diff changeset	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
489c9b5090e2 Initial load duke parents: diff changeset	18	*
489c9b5090e2 Initial load duke parents: diff changeset	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
489c9b5090e2 Initial load duke parents: diff changeset	20	* CA 95054 USA or visit www.sun.com if you need additional information or
489c9b5090e2 Initial load duke parents: diff changeset	21	* have any questions.
489c9b5090e2 Initial load duke parents: diff changeset	22	*
489c9b5090e2 Initial load duke parents: diff changeset	23	*/
489c9b5090e2 Initial load duke parents: diff changeset	24
489c9b5090e2 Initial load duke parents: diff changeset	25	inline void MarkSweep::mark_object(oop obj) {
489c9b5090e2 Initial load duke parents: diff changeset	26	#ifndef SERIALGC
489c9b5090e2 Initial load duke parents: diff changeset	27	if (UseParallelOldGC && VerifyParallelOldWithMarkSweep) {
489c9b5090e2 Initial load duke parents: diff changeset	28	assert(PSParallelCompact::mark_bitmap()->is_marked(obj),
360 21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	29	"Should be marked in the marking bitmap");
1 489c9b5090e2 Initial load duke parents: diff changeset	30	}
489c9b5090e2 Initial load duke parents: diff changeset	31	#endif // SERIALGC
489c9b5090e2 Initial load duke parents: diff changeset	32
489c9b5090e2 Initial load duke parents: diff changeset	33	// some marks may contain information we need to preserve so we store them away
489c9b5090e2 Initial load duke parents: diff changeset	34	// and overwrite the mark. We'll restore it at the end of markSweep.
489c9b5090e2 Initial load duke parents: diff changeset	35	markOop mark = obj->mark();
489c9b5090e2 Initial load duke parents: diff changeset	36	obj->set_mark(markOopDesc::prototype()->set_marked());
489c9b5090e2 Initial load duke parents: diff changeset	37
489c9b5090e2 Initial load duke parents: diff changeset	38	if (mark->must_be_preserved(obj)) {
489c9b5090e2 Initial load duke parents: diff changeset	39	preserve_mark(obj, mark);
489c9b5090e2 Initial load duke parents: diff changeset	40	}
489c9b5090e2 Initial load duke parents: diff changeset	41	}
360 21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	42
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	43	template <class T> inline void MarkSweep::follow_root(T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	44	assert(!Universe::heap()->is_in_reserved(p),
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	45	"roots shouldn't be things within the heap");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	46	#ifdef VALIDATE_MARK_SWEEP
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	47	if (ValidateMarkSweep) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	48	guarantee(!_root_refs_stack->contains(p), "should only be in here once");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	49	_root_refs_stack->push(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	50	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	51	#endif
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	52	T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	53	if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	54	oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	55	if (!obj->mark()->is_marked()) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	56	mark_object(obj);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	57	obj->follow_contents();
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	58	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	59	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	60	follow_stack();
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	61	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	62
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	63	template <class T> inline void MarkSweep::mark_and_follow(T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	64	// assert(Universe::heap()->is_in_reserved(p), "should be in object space");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	65	T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	66	if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	67	oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	68	if (!obj->mark()->is_marked()) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	69	mark_object(obj);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	70	obj->follow_contents();
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	71	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	72	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	73	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	74
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	75	template <class T> inline void MarkSweep::mark_and_push(T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	76	// assert(Universe::heap()->is_in_reserved(p), "should be in object space");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	77	T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	78	if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	79	oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	80	if (!obj->mark()->is_marked()) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	81	mark_object(obj);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	82	_marking_stack->push(obj);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	83	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	84	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	85	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	86
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	87	template <class T> inline void MarkSweep::adjust_pointer(T* p, bool isroot) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	88	T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	89	if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	90	oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	91	oop new_obj = oop(obj->mark()->decode_pointer());
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	92	assert(new_obj != NULL \|\| // is forwarding ptr?
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	93	obj->mark() == markOopDesc::prototype() \|\| // not gc marked?
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	94	(UseBiasedLocking && obj->mark()->has_bias_pattern()) \|\|
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	95	// not gc marked?
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	96	obj->is_shared(), // never forwarded?
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	97	"should be forwarded");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	98	if (new_obj != NULL) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	99	assert(Universe::heap()->is_in_reserved(new_obj),
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	100	"should be in object space");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	101	oopDesc::encode_store_heap_oop_not_null(p, new_obj);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	102	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	103	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	104	VALIDATE_MARK_SWEEP_ONLY(track_adjusted_pointer(p, isroot));
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	105	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	106
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	107	template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	108	#ifdef VALIDATE_MARK_SWEEP
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	109	if (ValidateMarkSweep) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	110	if (!Universe::heap()->is_in_reserved(p)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	111	_root_refs_stack->push(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	112	} else {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	113	_other_refs_stack->push(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	114	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	115	}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	116	#endif
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	117	mark_and_push(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 1 diff changeset	118	}

author	coleenp
	Sun, 13 Apr 2008 17:43:42 -0400
changeset 360	21d113ecbf6a
parent 1	489c9b5090e2
child 670	ddf3e9583f2f
permissions	-rw-r--r--