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src/share/vm/gc_implementation/shared/immutableSpace.cpp@f90c822e73f8 (annotated)

src/share/vm/gc_implementation/shared/immutableSpace.cpp

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

author

aoqi

date

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

changeset 0

f90c822e73f8

child 6876

710a3c8b516e

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, 2014, 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	#include "precompiled.hpp"
aoqi@0	26	#include "utilities/macros.hpp"
aoqi@0	27	#if INCLUDE_ALL_GCS
aoqi@0	28	#include "gc_implementation/shared/immutableSpace.hpp"
aoqi@0	29	#include "memory/universe.hpp"
aoqi@0	30	#include "oops/oop.inline.hpp"
aoqi@0	31	#endif // INCLUDE_ALL_GCS
aoqi@0	32
aoqi@0	33	void ImmutableSpace::initialize(MemRegion mr) {
aoqi@0	34	HeapWord* bottom = mr.start();
aoqi@0	35	HeapWord* end = mr.end();
aoqi@0	36
aoqi@0	37	assert(Universe::on_page_boundary(bottom) && Universe::on_page_boundary(end),
aoqi@0	38	"invalid space boundaries");
aoqi@0	39
aoqi@0	40	_bottom = bottom;
aoqi@0	41	_end = end;
aoqi@0	42	}
aoqi@0	43
aoqi@0	44	void ImmutableSpace::oop_iterate(ExtendedOopClosure* cl) {
aoqi@0	45	HeapWord* obj_addr = bottom();
aoqi@0	46	HeapWord* t = end();
aoqi@0	47	// Could call objects iterate, but this is easier.
aoqi@0	48	while (obj_addr < t) {
aoqi@0	49	obj_addr += oop(obj_addr)->oop_iterate(cl);
aoqi@0	50	}
aoqi@0	51	}
aoqi@0	52
aoqi@0	53	void ImmutableSpace::object_iterate(ObjectClosure* cl) {
aoqi@0	54	HeapWord* p = bottom();
aoqi@0	55	while (p < end()) {
aoqi@0	56	cl->do_object(oop(p));
aoqi@0	57	p += oop(p)->size();
aoqi@0	58	}
aoqi@0	59	}
aoqi@0	60
aoqi@0	61	#ifndef PRODUCT
aoqi@0	62
aoqi@0	63	void ImmutableSpace::print_short() const {
aoqi@0	64	tty->print(" space " SIZE_FORMAT "K, 100%% used", capacity_in_bytes() / K);
aoqi@0	65	}
aoqi@0	66
aoqi@0	67	void ImmutableSpace::print() const {
aoqi@0	68	print_short();
aoqi@0	69	tty->print_cr(" [" INTPTR_FORMAT_W(#-6) "," INTPTR_FORMAT_W(#-6) ")", p2i(bottom()), p2i(end()));
aoqi@0	70	}
aoqi@0	71
aoqi@0	72	#endif
aoqi@0	73
aoqi@0	74	void ImmutableSpace::verify() {
aoqi@0	75	HeapWord* p = bottom();
aoqi@0	76	HeapWord* t = end();
aoqi@0	77	HeapWord* prev_p = NULL;
aoqi@0	78	while (p < t) {
aoqi@0	79	oop(p)->verify();
aoqi@0	80	prev_p = p;
aoqi@0	81	p += oop(p)->size();
aoqi@0	82	}
aoqi@0	83	guarantee(p == end(), "end of last object must match end of space");
aoqi@0	84	}