Mercurial > hg > truffle
annotate src/share/vm/utilities/globalDefinitions_sparcWorks.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 | 17caeb034a63 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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_SPARCWORKS_HPP |
| 26 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_SPARCWORKS_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 | |
| 35 # include <ctype.h> | |
| 36 # include <dirent.h> | |
| 37 # include <string.h> | |
| 38 # include <strings.h> // for bsd'isms | |
| 39 # include <stdarg.h> | |
| 40 # include <stddef.h> // for offsetof | |
| 41 # include <stdio.h> | |
| 42 # include <stdlib.h> | |
| 43 # include <wchar.h> | |
| 44 # include <stdarg.h> | |
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45 #ifdef SOLARIS |
| 0 | 46 # include <ieeefp.h> |
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47 #endif |
| 0 | 48 # include <math.h> |
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50
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49 #ifdef LINUX |
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50 #ifndef FP_PZERO |
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51 // Linux doesn't have positive/negative zero |
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52 #define FP_PZERO FP_ZERO |
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53 #endif |
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54 #ifndef fpclass |
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55 #define fpclass fpclassify |
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56 #endif |
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57 #endif |
| 0 | 58 # include <time.h> |
| 59 # include <fcntl.h> | |
| 60 # include <dlfcn.h> | |
| 61 # include <pthread.h> | |
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62 #ifdef SOLARIS |
| 0 | 63 # include <thread.h> |
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64 #endif |
| 0 | 65 # include <limits.h> |
| 66 # include <errno.h> | |
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67 #ifdef SOLARIS |
| 0 | 68 # include <sys/trap.h> |
| 69 # include <sys/regset.h> | |
| 70 # include <sys/procset.h> | |
| 71 # include <ucontext.h> | |
| 72 # include <setjmp.h> | |
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73 #endif |
| 0 | 74 # ifdef SOLARIS_MUTATOR_LIBTHREAD |
| 75 # include <sys/procfs.h> | |
| 76 # endif | |
| 3960 | 77 |
| 78 #include <inttypes.h> | |
| 79 | |
| 80 // Solaris 8 doesn't provide definitions of these | |
| 81 #ifdef SOLARIS | |
| 82 #ifndef PRIdPTR | |
| 83 #if defined(_LP64) | |
| 84 #define PRIdPTR "ld" | |
| 85 #define PRIuPTR "lu" | |
| 86 #define PRIxPTR "lx" | |
| 87 #else | |
| 88 #define PRIdPTR "d" | |
| 89 #define PRIuPTR "u" | |
| 90 #define PRIxPTR "x" | |
| 91 #endif | |
| 92 #endif | |
| 93 #endif | |
| 94 | |
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95 #ifdef LINUX |
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96 # include <signal.h> |
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97 # include <ucontext.h> |
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98 # include <sys/time.h> |
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99 #endif |
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100 |
| 0 | 101 |
| 102 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures | |
| 103 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in | |
| 104 // system header files. On 32-bit architectures, there is no problem. | |
| 105 // On 64-bit architectures, defining NULL as a 32-bit constant can cause | |
| 106 // problems with varargs functions: C++ integral promotion rules say for | |
| 107 // varargs, we pass the argument 0 as an int. So, if NULL was passed to a | |
| 108 // varargs function it will remain 32-bits. Depending on the calling | |
| 109 // convention of the machine, if the argument is passed on the stack then | |
| 110 // only 32-bits of the "NULL" pointer may be initialized to zero. The | |
| 111 // other 32-bits will be garbage. If the varargs function is expecting a | |
| 112 // pointer when it extracts the argument, then we have a problem. | |
| 113 // | |
| 114 // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0. | |
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115 // |
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116 // Note: this fix doesn't work well on Linux because NULL will be overwritten |
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117 // whenever a system header file is included. Linux handles NULL correctly |
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118 // through a special type '__null'. |
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119 #ifdef SOLARIS |
| 0 | 120 #ifdef _LP64 |
| 121 #undef NULL | |
| 122 #define NULL 0L | |
| 123 #else | |
| 124 #ifndef NULL | |
| 125 #define NULL 0 | |
| 126 #endif | |
| 127 #endif | |
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128 #endif |
| 0 | 129 |
| 130 // NULL vs NULL_WORD: | |
| 131 // On Linux NULL is defined as a special type '__null'. Assigning __null to | |
| 132 // integer variable will cause gcc warning. Use NULL_WORD in places where a | |
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133 // pointer is stored as integer value. On some platforms, sizeof(intptr_t) > |
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134 // sizeof(void*), so here we want something which is integer type, but has the |
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135 // same size as a pointer. |
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136 #ifdef LINUX |
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137 #ifdef _LP64 |
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138 #define NULL_WORD 0L |
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139 #else |
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140 // Cast 0 to intptr_t rather than int32_t since they are not the same type |
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141 // on some platforms. |
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142 #define NULL_WORD ((intptr_t)0) |
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143 #endif |
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144 #else |
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145 #define NULL_WORD NULL |
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146 #endif |
| 0 | 147 |
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148 #ifndef LINUX |
| 0 | 149 // Compiler-specific primitive types |
| 150 typedef unsigned short uint16_t; | |
| 151 #ifndef _UINT32_T | |
| 152 #define _UINT32_T | |
| 153 typedef unsigned int uint32_t; | |
| 154 #endif | |
| 155 #if !defined(_SYS_INT_TYPES_H) | |
| 156 #ifndef _UINT64_T | |
| 157 #define _UINT64_T | |
| 158 typedef unsigned long long uint64_t; | |
| 159 #endif | |
| 160 // %%%% how to access definition of intptr_t portably in 5.5 onward? | |
| 161 typedef int intptr_t; | |
| 162 typedef unsigned int uintptr_t; | |
| 163 // If this gets an error, figure out a symbol XXX that implies the | |
| 164 // prior definition of intptr_t, and add "&& !defined(XXX)" above. | |
| 165 #endif | |
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166 #endif |
| 0 | 167 |
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168 // On solaris 8, UINTPTR_MAX is defined as empty. |
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169 // Everywhere else it's an actual value. |
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170 #if UINTPTR_MAX - 1 == -1 |
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171 #undef UINTPTR_MAX |
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172 #ifdef _LP64 |
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173 #define UINTPTR_MAX UINT64_MAX |
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174 #else |
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175 #define UINTPTR_MAX UINT32_MAX |
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176 #endif /* ifdef _LP64 */ |
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177 #endif |
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178 |
| 0 | 179 // Additional Java basic types |
| 180 | |
| 181 typedef unsigned char jubyte; | |
| 182 typedef unsigned short jushort; | |
| 183 typedef unsigned int juint; | |
| 184 typedef unsigned long long julong; | |
| 185 | |
| 186 | |
| 187 //---------------------------------------------------------------------------------------------------- | |
| 188 // Constant for jlong (specifying an long long constant is C++ compiler specific) | |
| 189 | |
| 190 // Build a 64bit integer constant | |
| 191 #define CONST64(x) (x ## LL) | |
| 192 #define UCONST64(x) (x ## ULL) | |
| 193 | |
| 194 const jlong min_jlong = CONST64(0x8000000000000000); | |
| 195 const jlong max_jlong = CONST64(0x7fffffffffffffff); | |
| 196 | |
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197 #ifdef SOLARIS |
| 0 | 198 //---------------------------------------------------------------------------------------------------- |
| 199 // ANSI C++ fixes | |
| 200 // NOTE:In the ANSI committee's continuing attempt to make each version | |
| 201 // of C++ incompatible with the previous version, you can no longer cast | |
| 202 // pointers to functions without specifying linkage unless you want to get | |
| 203 // warnings. | |
| 204 // | |
| 205 // This also means that pointers to functions can no longer be "hidden" | |
| 206 // in opaque types like void * because at the invokation point warnings | |
| 207 // will be generated. While this makes perfect sense from a type safety | |
| 208 // point of view it causes a lot of warnings on old code using C header | |
| 209 // files. Here are some typedefs to make the job of silencing warnings | |
| 210 // a bit easier. | |
| 211 // | |
| 212 // The final kick in the teeth is that you can only have extern "C" linkage | |
| 213 // specified at file scope. So these typedefs are here rather than in the | |
| 214 // .hpp for the class (os:Solaris usually) that needs them. | |
| 215 | |
| 216 extern "C" { | |
| 217 typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t); | |
| 218 typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t); | |
| 219 typedef int (*int_fnP_thread_t_i)(thread_t, int); | |
| 220 typedef int (*int_fnP_thread_t)(thread_t); | |
| 221 | |
| 222 typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst); | |
| 223 typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx); | |
| 224 | |
| 225 // typedef for missing API in libc | |
| 226 typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *); | |
| 227 typedef int (*int_fnP_mutex_tP)(mutex_t *); | |
| 228 typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg); | |
| 229 typedef int (*int_fnP_cond_tP)(cond_t *cv); | |
| 230 }; | |
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231 #endif |
| 0 | 232 |
| 233 //---------------------------------------------------------------------------------------------------- | |
| 234 // Debugging | |
| 235 | |
| 236 #define DEBUG_EXCEPTION ::abort(); | |
| 237 | |
| 238 extern "C" void breakpoint(); | |
| 239 #define BREAKPOINT ::breakpoint() | |
| 240 | |
| 241 // checking for nanness | |
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242 #ifdef SOLARIS |
| 0 | 243 #ifdef SPARC |
| 244 inline int g_isnan(float f) { return isnanf(f); } | |
| 245 #else | |
| 246 // isnanf() broken on Intel Solaris use isnand() | |
| 247 inline int g_isnan(float f) { return isnand(f); } | |
| 248 #endif | |
| 249 | |
| 250 inline int g_isnan(double f) { return isnand(f); } | |
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251 #elif LINUX |
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252 inline int g_isnan(float f) { return isnanf(f); } |
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253 inline int g_isnan(double f) { return isnan(f); } |
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254 #else |
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255 #error "missing platform-specific definition here" |
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256 #endif |
| 0 | 257 |
| 258 // Checking for finiteness | |
| 259 | |
| 260 inline int g_isfinite(jfloat f) { return finite(f); } | |
| 261 inline int g_isfinite(jdouble f) { return finite(f); } | |
| 262 | |
| 263 | |
| 264 // Wide characters | |
| 265 | |
| 266 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); } | |
| 267 | |
| 268 | |
| 269 // Misc | |
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270 // NOTE: This one leads to an infinite recursion on Linux |
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271 #ifndef LINUX |
| 0 | 272 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr); |
| 273 #define vsnprintf local_vsnprintf | |
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274 #endif |
| 0 | 275 |
| 276 // Portability macros | |
| 277 #define PRAGMA_INTERFACE | |
| 278 #define PRAGMA_IMPLEMENTATION | |
| 279 #define PRAGMA_IMPLEMENTATION_(arg) | |
| 280 #define VALUE_OBJ_CLASS_SPEC : public _ValueObj | |
| 281 | |
| 282 // Formatting. | |
| 283 #ifdef _LP64 | |
| 284 #define FORMAT64_MODIFIER "l" | |
| 285 #else // !_LP64 | |
| 286 #define FORMAT64_MODIFIER "ll" | |
| 287 #endif // _LP64 | |
| 288 | |
| 289 #define offset_of(klass,field) offsetof(klass,field) | |
| 1972 | 290 |
| 291 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_SPARCWORKS_HPP |