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src/share/vm/gc_implementation/parallelScavenge/adjoiningVirtualSpaces.cpp@db8a7163c682 (annotated)

src/share/vm/gc_implementation/parallelScavenge/adjoiningVirtualSpaces.cpp

Thu, 13 Dec 2012 09:28:14 +0100

author

stefank

date

Thu, 13 Dec 2012 09:28:14 +0100

changeset 4336

db8a7163c682

parent 2314

f95d63e2154a

child 6876

710a3c8b516e

permissions

-rw-r--r--

8004674: Add necessary .inline.hpp files to fix non-PCH build
Reviewed-by: stefank, coleenp
Contributed-by: volker.simonis@gmail.com

duke@435	1	/*
stefank@2314	2	* Copyright (c) 2003, 2010, 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	#include "precompiled.hpp"
stefank@2314	26	#include "gc_implementation/parallelScavenge/adjoiningVirtualSpaces.hpp"
stefank@4336	27	#include "memory/allocation.inline.hpp"
stefank@2314	28	#include "runtime/java.hpp"
duke@435	29
duke@435	30	AdjoiningVirtualSpaces::AdjoiningVirtualSpaces(ReservedSpace rs,
duke@435	31	size_t min_low_byte_size,
duke@435	32	size_t min_high_byte_size,
duke@435	33	size_t alignment) :
duke@435	34	_reserved_space(rs), _min_low_byte_size(min_low_byte_size),
duke@435	35	_min_high_byte_size(min_high_byte_size), _low(0), _high(0),
duke@435	36	_alignment(alignment) {}
duke@435	37
duke@435	38	// The maximum byte sizes are for the initial layout of the
duke@435	39	// virtual spaces and are not the limit on the maximum bytes sizes.
duke@435	40	void AdjoiningVirtualSpaces::initialize(size_t max_low_byte_size,
duke@435	41	size_t init_low_byte_size,
duke@435	42	size_t init_high_byte_size) {
duke@435	43
duke@435	44	// The reserved spaces for the two parts of the virtual space.
duke@435	45	ReservedSpace old_rs = _reserved_space.first_part(max_low_byte_size);
duke@435	46	ReservedSpace young_rs = _reserved_space.last_part(max_low_byte_size);
duke@435	47
duke@435	48	_low = new PSVirtualSpace(old_rs, alignment());
duke@435	49	if (!_low->expand_by(init_low_byte_size)) {
duke@435	50	vm_exit_during_initialization("Could not reserve enough space for "
duke@435	51	"object heap");
duke@435	52	}
duke@435	53
duke@435	54	_high = new PSVirtualSpaceHighToLow(young_rs, alignment());
duke@435	55	if (!_high->expand_by(init_high_byte_size)) {
duke@435	56	vm_exit_during_initialization("Could not reserve enough space for "
duke@435	57	"object heap");
duke@435	58	}
duke@435	59	}
duke@435	60
duke@435	61	bool AdjoiningVirtualSpaces::adjust_boundary_up(size_t change_in_bytes) {
duke@435	62	assert(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary, "runtime check");
duke@435	63	size_t actual_change = low()->expand_into(high(), change_in_bytes);
duke@435	64	return actual_change != 0;
duke@435	65	}
duke@435	66
duke@435	67	bool AdjoiningVirtualSpaces::adjust_boundary_down(size_t change_in_bytes) {
duke@435	68	assert(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary, "runtime check");
duke@435	69	size_t actual_change = high()->expand_into(low(), change_in_bytes);
duke@435	70	return actual_change != 0;
duke@435	71	}