Mercurial > hg > truffle
annotate src/share/vm/utilities/globalDefinitions_visCPP.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 |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | b6a8cc1e0d92 |
| children | 7848fc12602b |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 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_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP |
| 26 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP | |
| 27 | |
| 28 #include "prims/jni.h" | |
| 29 | |
| 0 | 30 // This file holds compiler-dependent includes, |
| 31 // globally used constants & types, class (forward) | |
| 32 // declarations and a few frequently used utility functions. | |
| 33 | |
| 34 # include <ctype.h> | |
| 35 # include <string.h> | |
| 36 # include <stdarg.h> | |
| 37 # include <stdlib.h> | |
| 38 # include <stddef.h>// for offsetof | |
| 39 # include <io.h> // for stream.cpp | |
| 40 # include <float.h> // for _isnan | |
| 41 # include <stdio.h> // for va_list | |
| 42 # include <time.h> | |
| 43 # include <fcntl.h> | |
|
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44 # include <limits.h> |
| 0 | 45 // Need this on windows to get the math constants (e.g., M_PI). |
| 46 #define _USE_MATH_DEFINES | |
| 47 # include <math.h> | |
| 48 | |
| 49 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures | |
| 50 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in | |
| 51 // system header files. On 32-bit architectures, there is no problem. | |
| 52 // On 64-bit architectures, defining NULL as a 32-bit constant can cause | |
| 53 // problems with varargs functions: C++ integral promotion rules say for | |
| 54 // varargs, we pass the argument 0 as an int. So, if NULL was passed to a | |
| 55 // varargs function it will remain 32-bits. Depending on the calling | |
| 56 // convention of the machine, if the argument is passed on the stack then | |
| 57 // only 32-bits of the "NULL" pointer may be initialized to zero. The | |
| 58 // other 32-bits will be garbage. If the varargs function is expecting a | |
| 59 // pointer when it extracts the argument, then we may have a problem. | |
| 60 // | |
| 61 // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0. | |
| 62 #ifdef _LP64 | |
| 63 #undef NULL | |
| 64 // 64-bit Windows uses a P64 data model (not LP64, although we define _LP64) | |
| 65 // Since longs are 32-bit we cannot use 0L here. Use the Visual C++ specific | |
| 66 // 64-bit integer-suffix (i64) instead. | |
| 67 #define NULL 0i64 | |
| 68 #else | |
| 69 #ifndef NULL | |
| 70 #define NULL 0 | |
| 71 #endif | |
| 72 #endif | |
| 73 | |
| 74 // NULL vs NULL_WORD: | |
| 75 // On Linux NULL is defined as a special type '__null'. Assigning __null to | |
| 76 // integer variable will cause gcc warning. Use NULL_WORD in places where a | |
| 77 // pointer is stored as integer value. | |
| 78 #define NULL_WORD NULL | |
| 79 | |
| 80 // Compiler-specific primitive types | |
| 81 typedef unsigned __int8 uint8_t; | |
| 82 typedef unsigned __int16 uint16_t; | |
| 83 typedef unsigned __int32 uint32_t; | |
| 84 typedef unsigned __int64 uint64_t; | |
| 85 | |
| 86 #ifdef _WIN64 | |
| 87 typedef unsigned __int64 uintptr_t; | |
| 88 #else | |
| 89 typedef unsigned int uintptr_t; | |
| 90 #endif | |
| 91 typedef signed __int8 int8_t; | |
| 92 typedef signed __int16 int16_t; | |
| 93 typedef signed __int32 int32_t; | |
| 94 typedef signed __int64 int64_t; | |
| 95 #ifdef _WIN64 | |
| 96 typedef signed __int64 intptr_t; | |
| 97 typedef signed __int64 ssize_t; | |
| 98 #else | |
| 99 typedef signed int intptr_t; | |
| 100 typedef signed int ssize_t; | |
| 101 #endif | |
| 102 | |
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103 #ifndef UINTPTR_MAX |
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104 #ifdef _WIN64 |
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105 #define UINTPTR_MAX _UI64_MAX |
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106 #else |
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107 #define UINTPTR_MAX _UI32_MAX |
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108 #endif |
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109 #endif |
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110 |
| 0 | 111 //---------------------------------------------------------------------------------------------------- |
| 112 // Additional Java basic types | |
| 113 | |
| 114 typedef unsigned char jubyte; | |
| 115 typedef unsigned short jushort; | |
| 116 typedef unsigned int juint; | |
| 117 typedef unsigned __int64 julong; | |
| 118 | |
| 119 | |
| 120 //---------------------------------------------------------------------------------------------------- | |
| 121 // Non-standard stdlib-like stuff: | |
| 122 inline int strcasecmp(const char *s1, const char *s2) { return _stricmp(s1,s2); } | |
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123 inline int strncasecmp(const char *s1, const char *s2, size_t n) { |
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124 return _strnicmp(s1,s2,n); |
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125 } |
| 0 | 126 |
| 127 | |
| 128 //---------------------------------------------------------------------------------------------------- | |
| 129 // Debugging | |
| 130 | |
| 131 #if _WIN64 | |
| 132 extern "C" void breakpoint(); | |
| 133 #define BREAKPOINT ::breakpoint() | |
| 134 #else | |
| 135 #define BREAKPOINT __asm { int 3 } | |
| 136 #endif | |
| 137 | |
| 138 //---------------------------------------------------------------------------------------------------- | |
| 139 // Checking for nanness | |
| 140 | |
| 141 inline int g_isnan(jfloat f) { return _isnan(f); } | |
| 142 inline int g_isnan(jdouble f) { return _isnan(f); } | |
| 143 | |
| 144 //---------------------------------------------------------------------------------------------------- | |
| 145 // Checking for finiteness | |
| 146 | |
| 147 inline int g_isfinite(jfloat f) { return _finite(f); } | |
| 148 inline int g_isfinite(jdouble f) { return _finite(f); } | |
| 149 | |
| 150 //---------------------------------------------------------------------------------------------------- | |
| 151 // Constant for jlong (specifying an long long constant is C++ compiler specific) | |
| 152 | |
| 153 // Build a 64bit integer constant on with Visual C++ | |
| 154 #define CONST64(x) (x ## i64) | |
| 155 #define UCONST64(x) ((uint64_t)CONST64(x)) | |
| 156 | |
| 157 const jlong min_jlong = CONST64(0x8000000000000000); | |
| 158 const jlong max_jlong = CONST64(0x7fffffffffffffff); | |
| 159 | |
| 160 //---------------------------------------------------------------------------------------------------- | |
| 161 // Miscellaneous | |
| 162 | |
| 163 // Visual Studio 2005 deprecates POSIX names - use ISO C++ names instead | |
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164 #if _MSC_VER >= 1400 |
| 0 | 165 #define open _open |
| 166 #define close _close | |
| 167 #define read _read | |
| 168 #define write _write | |
| 169 #define lseek _lseek | |
| 170 #define unlink _unlink | |
| 171 #define strdup _strdup | |
| 172 #endif | |
| 173 | |
| 174 #pragma warning( disable : 4100 ) // unreferenced formal parameter | |
| 175 #pragma warning( disable : 4127 ) // conditional expression is constant | |
| 176 #pragma warning( disable : 4514 ) // unreferenced inline function has been removed | |
| 177 #pragma warning( disable : 4244 ) // possible loss of data | |
| 178 #pragma warning( disable : 4512 ) // assignment operator could not be generated | |
| 179 #pragma warning( disable : 4201 ) // nonstandard extension used : nameless struct/union (needed in windows.h) | |
| 180 #pragma warning( disable : 4511 ) // copy constructor could not be generated | |
| 181 #pragma warning( disable : 4291 ) // no matching operator delete found; memory will not be freed if initialization thows an exception | |
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182 #ifdef CHECK_UNHANDLED_OOPS |
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183 #pragma warning( disable : 4521 ) // class has multiple copy ctors of a single type |
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184 #pragma warning( disable : 4522 ) // class has multiple assignment operators of a single type |
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185 #endif // CHECK_UNHANDLED_OOPS |
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186 #if _MSC_VER >= 1400 |
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187 #pragma warning( disable : 4996 ) // unsafe string functions. Same as define _CRT_SECURE_NO_WARNINGS/_CRT_SECURE_NO_DEPRICATE |
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188 #endif |
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189 |
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190 inline int vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { |
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191 // If number of characters written == count, Windows doesn't write a |
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192 // terminating NULL, so we do it ourselves. |
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193 int ret = _vsnprintf(buf, count, fmt, argptr); |
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194 if (count > 0) buf[count-1] = '\0'; |
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195 return ret; |
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196 } |
| 0 | 197 |
| 198 // Portability macros | |
| 199 #define PRAGMA_INTERFACE | |
| 200 #define PRAGMA_IMPLEMENTATION | |
| 201 #define PRAGMA_IMPLEMENTATION_(arg) | |
| 202 #define VALUE_OBJ_CLASS_SPEC : public _ValueObj | |
| 203 | |
| 204 // Formatting. | |
| 205 #define FORMAT64_MODIFIER "I64" | |
| 206 | |
| 3960 | 207 // Visual Studio doesn't provide inttypes.h so provide appropriate definitions here. |
| 208 // The 32 bits ones might need I32 but seem to work ok without it. | |
| 209 #define PRId32 "d" | |
| 210 #define PRIu32 "u" | |
| 211 #define PRIx32 "x" | |
| 212 | |
| 213 #define PRId64 "I64d" | |
| 214 #define PRIu64 "I64u" | |
| 215 #define PRIx64 "I64x" | |
| 216 | |
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217 #ifdef _LP64 |
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218 #define PRIdPTR "I64d" |
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219 #define PRIuPTR "I64u" |
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220 #define PRIxPTR "I64x" |
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221 #else |
| 3960 | 222 #define PRIdPTR "d" |
| 223 #define PRIuPTR "u" | |
| 224 #define PRIxPTR "x" | |
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225 #endif |
| 3960 | 226 |
| 0 | 227 #define offset_of(klass,field) offsetof(klass,field) |
| 1972 | 228 |
| 229 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_VISCPP_HPP |