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src/share/vm/oops/oop.pcgc.inline.hpp@0fbdb4381b99 (annotated)

src/share/vm/oops/oop.pcgc.inline.hpp

Mon, 09 Mar 2009 13:28:46 -0700

author

xdono

date

Mon, 09 Mar 2009 13:28:46 -0700

changeset 1014

0fbdb4381b99

parent 631

d1605aabd0a1

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6814575: Update copyright year
Summary: Update copyright for files that have been modified in 2009, up to 03/09
Reviewed-by: katleman, tbell, ohair

duke@435	1	/*
xdono@631	2	* Copyright 2005-2008 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	inline void oopDesc::update_contents(ParCompactionManager* cm) {
duke@435	26	// The klass field must be updated before anything else
duke@435	27	// can be done.
duke@435	28	DEBUG_ONLY(klassOopDesc* original_klass = klass());
duke@435	29
duke@435	30	// Can the option to update and/or copy be moved up in the
duke@435	31	// call chain to avoid calling into here?
duke@435	32
duke@435	33	if (PSParallelCompact::should_update_klass(klass())) {
duke@435	34	update_header();
duke@435	35	assert(klass()->is_klass(), "Not updated correctly");
duke@435	36	} else {
duke@435	37	assert(klass()->is_klass(), "Not updated");
duke@435	38	}
duke@435	39
duke@435	40	Klass* new_klass = blueprint();
duke@435	41	if (!new_klass->oop_is_typeArray()) {
duke@435	42	// It might contain oops beyond the header, so take the virtual call.
duke@435	43	new_klass->oop_update_pointers(cm, this);
duke@435	44	}
duke@435	45	// Else skip it. The typeArrayKlass in the header never needs scavenging.
duke@435	46	}
duke@435	47
duke@435	48	inline void oopDesc::update_contents(ParCompactionManager* cm,
duke@435	49	HeapWord* begin_limit,
duke@435	50	HeapWord* end_limit) {
duke@435	51	// The klass field must be updated before anything else
duke@435	52	// can be done.
duke@435	53	debug_only(klassOopDesc* original_klass = klass());
duke@435	54
duke@435	55	update_contents(cm, klass(), begin_limit, end_limit);
duke@435	56	}
duke@435	57
duke@435	58	inline void oopDesc::update_contents(ParCompactionManager* cm,
duke@435	59	klassOop old_klass,
duke@435	60	HeapWord* begin_limit,
duke@435	61	HeapWord* end_limit) {
duke@435	62
duke@435	63	klassOop updated_klass =
duke@435	64	PSParallelCompact::summary_data().calc_new_klass(old_klass);
duke@435	65
duke@435	66	// Needs to be boundary aware for the 64 bit case
duke@435	67	// update_header();
duke@435	68	// The klass has moved. Is the location of the klass
duke@435	69	// within the limits?
coleenp@548	70	if ((((HeapWord*)&_metadata._klass) >= begin_limit) &&
coleenp@548	71	(((HeapWord*)&_metadata._klass) < end_limit)) {
duke@435	72	set_klass(updated_klass);
duke@435	73	}
duke@435	74
duke@435	75	Klass* klass = updated_klass->klass_part();
duke@435	76	if (!klass->oop_is_typeArray()) {
duke@435	77	// It might contain oops beyond the header, so take the virtual call.
duke@435	78	klass->oop_update_pointers(cm, this, begin_limit, end_limit);
duke@435	79	}
duke@435	80	// Else skip it. The typeArrayKlass in the header never needs scavenging.
duke@435	81	}
duke@435	82
duke@435	83	inline void oopDesc::follow_contents(ParCompactionManager* cm) {
duke@435	84	assert (PSParallelCompact::mark_bitmap()->is_marked(this),
duke@435	85	"should be marked");
duke@435	86	blueprint()->oop_follow_contents(cm, this);
duke@435	87	}
duke@435	88
duke@435	89	// Used by parallel old GC.
duke@435	90
duke@435	91	inline void oopDesc::follow_header(ParCompactionManager* cm) {
coleenp@548	92	if (UseCompressedOops) {
coleenp@548	93	PSParallelCompact::mark_and_push(cm, compressed_klass_addr());
coleenp@548	94	} else {
coleenp@548	95	PSParallelCompact::mark_and_push(cm, klass_addr());
coleenp@548	96	}
duke@435	97	}
duke@435	98
duke@435	99	inline oop oopDesc::forward_to_atomic(oop p) {
duke@435	100	assert(ParNewGeneration::is_legal_forward_ptr(p),
duke@435	101	"illegal forwarding pointer value.");
duke@435	102	markOop oldMark = mark();
duke@435	103	markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p);
duke@435	104	markOop curMark;
duke@435	105
duke@435	106	assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable");
duke@435	107	assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this.");
duke@435	108
duke@435	109	while (!is_forwarded()) {
duke@435	110	curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark);
duke@435	111	if (curMark == oldMark) {
duke@435	112	assert(is_forwarded(), "the CAS should have succeeded.");
duke@435	113	return NULL;
duke@435	114	}
duke@435	115	oldMark = curMark;
duke@435	116	}
duke@435	117	return forwardee();
duke@435	118	}
duke@435	119
duke@435	120	inline void oopDesc::update_header() {
coleenp@548	121	if (UseCompressedOops) {
coleenp@548	122	PSParallelCompact::adjust_pointer(compressed_klass_addr());
coleenp@548	123	} else {
coleenp@548	124	PSParallelCompact::adjust_pointer(klass_addr());
coleenp@548	125	}
duke@435	126	}
duke@435	127
duke@435	128	inline void oopDesc::update_header(HeapWord* beg_addr, HeapWord* end_addr) {
coleenp@548	129	if (UseCompressedOops) {
coleenp@548	130	PSParallelCompact::adjust_pointer(compressed_klass_addr(),
coleenp@548	131	beg_addr, end_addr);
coleenp@548	132	} else {
coleenp@548	133	PSParallelCompact::adjust_pointer(klass_addr(), beg_addr, end_addr);
coleenp@548	134	}
duke@435	135	}