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annotate src/share/vm/gc_implementation/parallelScavenge/adjoiningVirtualSpaces.cpp @ 17467:55fb97c4c58d hs25-b65
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov
| author | mikael |
|---|---|
| date | Tue, 24 Dec 2013 11:48:39 -0800 |
| parents | db8a7163c682 |
| children |
| rev | line source |
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| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "gc_implementation/parallelScavenge/adjoiningVirtualSpaces.hpp" | |
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27 #include "memory/allocation.inline.hpp" |
| 1972 | 28 #include "runtime/java.hpp" |
| 0 | 29 |
| 30 AdjoiningVirtualSpaces::AdjoiningVirtualSpaces(ReservedSpace rs, | |
| 31 size_t min_low_byte_size, | |
| 32 size_t min_high_byte_size, | |
| 33 size_t alignment) : | |
| 34 _reserved_space(rs), _min_low_byte_size(min_low_byte_size), | |
| 35 _min_high_byte_size(min_high_byte_size), _low(0), _high(0), | |
| 36 _alignment(alignment) {} | |
| 37 | |
| 38 // The maximum byte sizes are for the initial layout of the | |
| 39 // virtual spaces and are not the limit on the maximum bytes sizes. | |
| 40 void AdjoiningVirtualSpaces::initialize(size_t max_low_byte_size, | |
| 41 size_t init_low_byte_size, | |
| 42 size_t init_high_byte_size) { | |
| 43 | |
| 44 // The reserved spaces for the two parts of the virtual space. | |
| 45 ReservedSpace old_rs = _reserved_space.first_part(max_low_byte_size); | |
| 46 ReservedSpace young_rs = _reserved_space.last_part(max_low_byte_size); | |
| 47 | |
| 48 _low = new PSVirtualSpace(old_rs, alignment()); | |
| 49 if (!_low->expand_by(init_low_byte_size)) { | |
| 50 vm_exit_during_initialization("Could not reserve enough space for " | |
| 51 "object heap"); | |
| 52 } | |
| 53 | |
| 54 _high = new PSVirtualSpaceHighToLow(young_rs, alignment()); | |
| 55 if (!_high->expand_by(init_high_byte_size)) { | |
| 56 vm_exit_during_initialization("Could not reserve enough space for " | |
| 57 "object heap"); | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 bool AdjoiningVirtualSpaces::adjust_boundary_up(size_t change_in_bytes) { | |
| 62 assert(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary, "runtime check"); | |
| 63 size_t actual_change = low()->expand_into(high(), change_in_bytes); | |
| 64 return actual_change != 0; | |
| 65 } | |
| 66 | |
| 67 bool AdjoiningVirtualSpaces::adjust_boundary_down(size_t change_in_bytes) { | |
| 68 assert(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary, "runtime check"); | |
| 69 size_t actual_change = high()->expand_into(low(), change_in_bytes); | |
| 70 return actual_change != 0; | |
| 71 } |