Mercurial > hg > truffle
annotate src/share/vm/ci/ciClassList.hpp @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
author | tschatzl |
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date | Fri, 10 Oct 2014 15:51:58 +0200 |
parents | b8413a9cbb84 |
children | 4ca6dc0799b6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 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 #ifndef SHARE_VM_CI_CICLASSLIST_HPP |
26 #define SHARE_VM_CI_CICLASSLIST_HPP | |
27 | |
0 | 28 class ciEnv; |
29 class ciObjectFactory; | |
30 class ciConstantPoolCache; | |
31 | |
32 class ciField; | |
33 class ciConstant; | |
34 class ciFlags; | |
35 class ciExceptionHandler; | |
36 class ciCallProfile; | |
37 class ciSignature; | |
38 | |
39 class ciBytecodeStream; | |
40 class ciSignatureStream; | |
41 class ciExceptionHandlerStream; | |
42 | |
43 class ciTypeFlow; | |
44 | |
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45 class ciBaseObject; |
0 | 46 class ciObject; |
47 class ciNullObject; | |
48 class ciInstance; | |
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49 class ciCallSite; |
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50 class ciMemberName; |
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51 class ciMethodHandle; |
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52 class ciMethodType; |
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53 class ciArray; |
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54 class ciObjArray; |
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55 class ciTypeArray; |
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56 class ciSymbol; |
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57 class ciMetadata; |
0 | 58 class ciMethod; |
59 class ciMethodData; | |
60 class ciReceiverTypeData; // part of ciMethodData | |
61 class ciType; | |
62 class ciReturnAddress; | |
63 class ciKlass; | |
64 class ciInstanceKlass; | |
65 class ciArrayKlass; | |
66 class ciObjArrayKlass; | |
67 class ciTypeArrayKlass; | |
68 | |
69 // Simulate Java Language style package-private access with | |
70 // friend declarations. | |
71 // This is a great idea but gcc and other C++ compilers give an | |
72 // error for being friends with yourself, so this macro does not | |
73 // compile on some platforms. | |
74 | |
75 // Everyone gives access to ciObjectFactory | |
76 #define CI_PACKAGE_ACCESS \ | |
3939 | 77 friend class ciObjectFactory; \ |
78 friend class VMStructs; | |
0 | 79 |
80 // These are the packages that have access to ciEnv | |
81 // Any more access must be given explicitly. | |
82 #define CI_PACKAGE_ACCESS_TO \ | |
83 friend class ciObjectFactory; \ | |
3939 | 84 friend class VMStructs; \ |
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85 friend class ciCallSite; \ |
0 | 86 friend class ciConstantPoolCache; \ |
87 friend class ciField; \ | |
88 friend class ciConstant; \ | |
89 friend class ciFlags; \ | |
90 friend class ciExceptionHandler; \ | |
91 friend class ciCallProfile; \ | |
92 friend class ciSignature; \ | |
93 friend class ciBytecodeStream; \ | |
94 friend class ciSignatureStream; \ | |
95 friend class ciExceptionHandlerStream; \ | |
96 friend class ciObject; \ | |
97 friend class ciNullObject; \ | |
98 friend class ciInstance; \ | |
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99 friend class ciMemberName; \ |
0 | 100 friend class ciMethod; \ |
101 friend class ciMethodData; \ | |
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102 friend class ciMethodHandle; \ |
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103 friend class ciMethodType; \ |
0 | 104 friend class ciReceiverTypeData; \ |
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105 friend class ciTypeEntries; \ |
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106 friend class ciSpeculativeTrapData; \ |
0 | 107 friend class ciSymbol; \ |
108 friend class ciArray; \ | |
109 friend class ciObjArray; \ | |
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110 friend class ciMetadata; \ |
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111 friend class ciReplay; \ |
0 | 112 friend class ciTypeArray; \ |
113 friend class ciType; \ | |
114 friend class ciReturnAddress; \ | |
115 friend class ciKlass; \ | |
116 friend class ciInstanceKlass; \ | |
117 friend class ciArrayKlass; \ | |
118 friend class ciObjArrayKlass; \ | |
119 friend class ciTypeArrayKlass; \ | |
1972 | 120 |
121 #endif // SHARE_VM_CI_CICLASSLIST_HPP |