Mercurial > hg > graal-compiler
annotate src/share/vm/memory/memRegion.cpp @ 1751:2528b5bd749c
6980262: Memory leak when exception is thrown in static initializer
Summary: Use resource memory instead of c-heap for the exception message
Reviewed-by: phh, jmasa
author | kamg |
---|---|
date | Fri, 27 Aug 2010 15:05:28 -0400 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
---|---|
0 | 1 /* |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
2 * Copyright (c) 2000, 2004, 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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 // A very simple data structure representing a contigous word-aligned | |
26 // region of address space. | |
27 | |
28 #include "incls/_precompiled.incl" | |
29 #include "incls/_memRegion.cpp.incl" | |
30 | |
31 MemRegion MemRegion::intersection(const MemRegion mr2) const { | |
32 MemRegion res; | |
33 HeapWord* res_start = MAX2(start(), mr2.start()); | |
34 HeapWord* res_end = MIN2(end(), mr2.end()); | |
35 if (res_start < res_end) { | |
36 res.set_start(res_start); | |
37 res.set_end(res_end); | |
38 } | |
39 return res; | |
40 } | |
41 | |
42 MemRegion MemRegion::_union(const MemRegion mr2) const { | |
43 // If one region is empty, return the other | |
44 if (is_empty()) return mr2; | |
45 if (mr2.is_empty()) return MemRegion(start(), end()); | |
46 | |
47 // Otherwise, regions must overlap or be adjacent | |
48 assert(((start() <= mr2.start()) && (end() >= mr2.start())) || | |
49 ((mr2.start() <= start()) && (mr2.end() >= start())), | |
50 "non-adjacent or overlapping regions"); | |
51 MemRegion res; | |
52 HeapWord* res_start = MIN2(start(), mr2.start()); | |
53 HeapWord* res_end = MAX2(end(), mr2.end()); | |
54 res.set_start(res_start); | |
55 res.set_end(res_end); | |
56 return res; | |
57 } | |
58 | |
59 MemRegion MemRegion::minus(const MemRegion mr2) const { | |
60 // There seem to be 6 cases: | |
61 // |this MemRegion| | |
62 // |strictly below| | |
63 // |overlap beginning| | |
64 // |interior| | |
65 // |overlap ending| | |
66 // |strictly above| | |
67 // |completely overlapping| | |
68 // We can't deal with an interior case because it would | |
69 // produce two disjoint regions as a result. | |
70 // We aren't trying to be optimal in the number of tests below, | |
71 // but the order is important to distinguish the strictly cases | |
72 // from the overlapping cases. | |
73 if (mr2.end() <= start()) { | |
74 // strictly below | |
75 return MemRegion(start(), end()); | |
76 } | |
77 if (mr2.start() <= start() && mr2.end() <= end()) { | |
78 // overlap beginning | |
79 return MemRegion(mr2.end(), end()); | |
80 } | |
81 if (mr2.start() >= end()) { | |
82 // strictly above | |
83 return MemRegion(start(), end()); | |
84 } | |
85 if (mr2.start() >= start() && mr2.end() >= end()) { | |
86 // overlap ending | |
87 return MemRegion(start(), mr2.start()); | |
88 } | |
89 if (mr2.start() <= start() && mr2.end() >= end()) { | |
90 // completely overlapping | |
91 return MemRegion(); | |
92 } | |
93 if (mr2.start() > start() && mr2.end() < end()) { | |
94 // interior | |
95 guarantee(false, "MemRegion::minus, but interior"); | |
96 return MemRegion(); | |
97 } | |
98 ShouldNotReachHere(); | |
99 return MemRegion(); | |
100 } |