Mercurial > hg > truffle
annotate src/share/vm/memory/memRegion.cpp @ 14359:f7f0c6a77d6d
8033426: Scale initial NewSize using NewRatio if not set on command line
Summary: Now using NewRatio to size initial NewSize if not specified on commandline.
Reviewed-by: jmasa, jwilhelm
| author | sjohanss |
|---|---|
| date | Wed, 05 Feb 2014 11:05:13 +0100 |
| parents | 9758d9f36299 |
| children | 833b0f92429a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2013, 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" |
| 10271 | 26 #include "memory/allocation.hpp" |
| 27 #include "memory/allocation.inline.hpp" | |
| 1972 | 28 #include "memory/memRegion.hpp" |
| 29 #include "runtime/globals.hpp" | |
| 30 | |
| 0 | 31 // A very simple data structure representing a contigous word-aligned |
| 32 // region of address space. | |
| 33 | |
| 34 MemRegion MemRegion::intersection(const MemRegion mr2) const { | |
| 35 MemRegion res; | |
| 36 HeapWord* res_start = MAX2(start(), mr2.start()); | |
| 37 HeapWord* res_end = MIN2(end(), mr2.end()); | |
| 38 if (res_start < res_end) { | |
| 39 res.set_start(res_start); | |
| 40 res.set_end(res_end); | |
| 41 } | |
| 42 return res; | |
| 43 } | |
| 44 | |
| 45 MemRegion MemRegion::_union(const MemRegion mr2) const { | |
| 46 // If one region is empty, return the other | |
| 47 if (is_empty()) return mr2; | |
| 48 if (mr2.is_empty()) return MemRegion(start(), end()); | |
| 49 | |
| 50 // Otherwise, regions must overlap or be adjacent | |
| 51 assert(((start() <= mr2.start()) && (end() >= mr2.start())) || | |
| 52 ((mr2.start() <= start()) && (mr2.end() >= start())), | |
| 53 "non-adjacent or overlapping regions"); | |
| 54 MemRegion res; | |
| 55 HeapWord* res_start = MIN2(start(), mr2.start()); | |
| 56 HeapWord* res_end = MAX2(end(), mr2.end()); | |
| 57 res.set_start(res_start); | |
| 58 res.set_end(res_end); | |
| 59 return res; | |
| 60 } | |
| 61 | |
| 62 MemRegion MemRegion::minus(const MemRegion mr2) const { | |
| 63 // There seem to be 6 cases: | |
| 64 // |this MemRegion| | |
| 65 // |strictly below| | |
| 66 // |overlap beginning| | |
| 67 // |interior| | |
| 68 // |overlap ending| | |
| 69 // |strictly above| | |
| 70 // |completely overlapping| | |
| 71 // We can't deal with an interior case because it would | |
| 72 // produce two disjoint regions as a result. | |
| 73 // We aren't trying to be optimal in the number of tests below, | |
| 74 // but the order is important to distinguish the strictly cases | |
| 75 // from the overlapping cases. | |
| 76 if (mr2.end() <= start()) { | |
| 77 // strictly below | |
| 78 return MemRegion(start(), end()); | |
| 79 } | |
| 80 if (mr2.start() <= start() && mr2.end() <= end()) { | |
| 81 // overlap beginning | |
| 82 return MemRegion(mr2.end(), end()); | |
| 83 } | |
| 84 if (mr2.start() >= end()) { | |
| 85 // strictly above | |
| 86 return MemRegion(start(), end()); | |
| 87 } | |
| 88 if (mr2.start() >= start() && mr2.end() >= end()) { | |
| 89 // overlap ending | |
| 90 return MemRegion(start(), mr2.start()); | |
| 91 } | |
| 92 if (mr2.start() <= start() && mr2.end() >= end()) { | |
| 93 // completely overlapping | |
| 94 return MemRegion(); | |
| 95 } | |
| 96 if (mr2.start() > start() && mr2.end() < end()) { | |
| 97 // interior | |
| 98 guarantee(false, "MemRegion::minus, but interior"); | |
| 99 return MemRegion(); | |
| 100 } | |
| 101 ShouldNotReachHere(); | |
| 102 return MemRegion(); | |
| 103 } | |
| 10271 | 104 |
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9758d9f36299
8021954: VM SIGSEGV during classloading on MacOS; hs_err_pid file produced
coleenp
parents:
10271
diff
changeset
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105 void* MemRegion::operator new(size_t size) throw() { |
| 10271 | 106 return (address)AllocateHeap(size, mtGC, 0, AllocFailStrategy::RETURN_NULL); |
| 107 } | |
| 108 | |
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9758d9f36299
8021954: VM SIGSEGV during classloading on MacOS; hs_err_pid file produced
coleenp
parents:
10271
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109 void* MemRegion::operator new [](size_t size) throw() { |
| 10271 | 110 return (address)AllocateHeap(size, mtGC, 0, AllocFailStrategy::RETURN_NULL); |
| 111 } | |
| 112 void MemRegion::operator delete(void* p) { | |
| 113 FreeHeap(p, mtGC); | |
| 114 } | |
| 115 | |
| 116 void MemRegion::operator delete [](void* p) { | |
| 117 FreeHeap(p, mtGC); | |
| 118 } | |
| 119 |