Mercurial > hg > truffle
annotate src/share/vm/utilities/globalDefinitions.hpp @ 18041:52b4284cb496
Merge with jdk8u20-b26
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 16:02:50 +0200 |
| parents | 4ca6dc0799b6 78bbf4d43a14 |
| children | 7848fc12602b |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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_HPP |
| 26 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP | |
| 27 | |
| 4006 | 28 #ifndef __STDC_FORMAT_MACROS |
| 3960 | 29 #define __STDC_FORMAT_MACROS |
| 4006 | 30 #endif |
| 3960 | 31 |
| 1972 | 32 #ifdef TARGET_COMPILER_gcc |
| 33 # include "utilities/globalDefinitions_gcc.hpp" | |
| 34 #endif | |
| 35 #ifdef TARGET_COMPILER_visCPP | |
| 36 # include "utilities/globalDefinitions_visCPP.hpp" | |
| 37 #endif | |
| 38 #ifdef TARGET_COMPILER_sparcWorks | |
| 39 # include "utilities/globalDefinitions_sparcWorks.hpp" | |
| 40 #endif | |
| 14411 | 41 #ifdef TARGET_COMPILER_xlc |
| 42 # include "utilities/globalDefinitions_xlc.hpp" | |
| 43 #endif | |
| 1972 | 44 |
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45 #ifndef PRAGMA_DIAG_PUSH |
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46 #define PRAGMA_DIAG_PUSH |
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47 #endif |
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48 #ifndef PRAGMA_DIAG_POP |
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49 #define PRAGMA_DIAG_POP |
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50 #endif |
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51 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED |
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52 #define PRAGMA_FORMAT_NONLITERAL_IGNORED |
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53 #endif |
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54 #ifndef PRAGMA_FORMAT_IGNORED |
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55 #define PRAGMA_FORMAT_IGNORED |
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56 #endif |
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57 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL |
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58 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL |
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59 #endif |
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60 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL |
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61 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL |
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62 #endif |
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63 #ifndef PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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64 #define PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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65 #endif |
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66 #ifndef ATTRIBUTE_PRINTF |
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67 #define ATTRIBUTE_PRINTF(fmt, vargs) |
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68 #endif |
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69 |
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70 |
| 1972 | 71 #include "utilities/macros.hpp" |
| 72 | |
| 0 | 73 // This file holds all globally used constants & types, class (forward) |
| 74 // declarations and a few frequently used utility functions. | |
| 75 | |
| 76 //---------------------------------------------------------------------------------------------------- | |
| 77 // Constants | |
| 78 | |
| 79 const int LogBytesPerShort = 1; | |
| 80 const int LogBytesPerInt = 2; | |
| 81 #ifdef _LP64 | |
| 82 const int LogBytesPerWord = 3; | |
| 83 #else | |
| 84 const int LogBytesPerWord = 2; | |
| 85 #endif | |
| 86 const int LogBytesPerLong = 3; | |
| 87 | |
| 88 const int BytesPerShort = 1 << LogBytesPerShort; | |
| 89 const int BytesPerInt = 1 << LogBytesPerInt; | |
| 90 const int BytesPerWord = 1 << LogBytesPerWord; | |
| 91 const int BytesPerLong = 1 << LogBytesPerLong; | |
| 92 | |
| 93 const int LogBitsPerByte = 3; | |
| 94 const int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort; | |
| 95 const int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt; | |
| 96 const int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord; | |
| 97 const int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong; | |
| 98 | |
| 99 const int BitsPerByte = 1 << LogBitsPerByte; | |
| 100 const int BitsPerShort = 1 << LogBitsPerShort; | |
| 101 const int BitsPerInt = 1 << LogBitsPerInt; | |
| 102 const int BitsPerWord = 1 << LogBitsPerWord; | |
| 103 const int BitsPerLong = 1 << LogBitsPerLong; | |
| 104 | |
| 105 const int WordAlignmentMask = (1 << LogBytesPerWord) - 1; | |
| 106 const int LongAlignmentMask = (1 << LogBytesPerLong) - 1; | |
| 107 | |
| 108 const int WordsPerLong = 2; // Number of stack entries for longs | |
| 109 | |
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110 const int oopSize = sizeof(char*); // Full-width oop |
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111 extern int heapOopSize; // Oop within a java object |
| 0 | 112 const int wordSize = sizeof(char*); |
| 113 const int longSize = sizeof(jlong); | |
| 114 const int jintSize = sizeof(jint); | |
| 115 const int size_tSize = sizeof(size_t); | |
| 116 | |
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117 const int BytesPerOop = BytesPerWord; // Full-width oop |
| 0 | 118 |
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119 extern int LogBytesPerHeapOop; // Oop within a java object |
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120 extern int LogBitsPerHeapOop; |
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121 extern int BytesPerHeapOop; |
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122 extern int BitsPerHeapOop; |
| 0 | 123 |
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124 // Oop encoding heap max |
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125 extern uint64_t OopEncodingHeapMax; |
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126 |
| 0 | 127 const int BitsPerJavaInteger = 32; |
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128 const int BitsPerJavaLong = 64; |
| 0 | 129 const int BitsPerSize_t = size_tSize * BitsPerByte; |
| 130 | |
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131 // Size of a char[] needed to represent a jint as a string in decimal. |
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132 const int jintAsStringSize = 12; |
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133 |
| 0 | 134 // In fact this should be |
| 135 // log2_intptr(sizeof(class JavaThread)) - log2_intptr(64); | |
| 136 // see os::set_memory_serialize_page() | |
| 137 #ifdef _LP64 | |
| 138 const int SerializePageShiftCount = 4; | |
| 139 #else | |
| 140 const int SerializePageShiftCount = 3; | |
| 141 #endif | |
| 142 | |
| 143 // An opaque struct of heap-word width, so that HeapWord* can be a generic | |
| 144 // pointer into the heap. We require that object sizes be measured in | |
| 145 // units of heap words, so that that | |
| 146 // HeapWord* hw; | |
| 147 // hw += oop(hw)->foo(); | |
| 148 // works, where foo is a method (like size or scavenge) that returns the | |
| 149 // object size. | |
| 150 class HeapWord { | |
| 151 friend class VMStructs; | |
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152 private: |
| 0 | 153 char* i; |
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154 #ifndef PRODUCT |
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155 public: |
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156 char* value() { return i; } |
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157 #endif |
| 0 | 158 }; |
| 159 | |
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160 // Analogous opaque struct for metadata allocated from |
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161 // metaspaces. |
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162 class MetaWord { |
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163 friend class VMStructs; |
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164 private: |
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165 char* i; |
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166 }; |
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167 |
| 0 | 168 // HeapWordSize must be 2^LogHeapWordSize. |
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169 const int HeapWordSize = sizeof(HeapWord); |
| 0 | 170 #ifdef _LP64 |
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171 const int LogHeapWordSize = 3; |
| 0 | 172 #else |
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173 const int LogHeapWordSize = 2; |
| 0 | 174 #endif |
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175 const int HeapWordsPerLong = BytesPerLong / HeapWordSize; |
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176 const int LogHeapWordsPerLong = LogBytesPerLong - LogHeapWordSize; |
| 0 | 177 |
| 178 // The larger HeapWordSize for 64bit requires larger heaps | |
| 179 // for the same application running in 64bit. See bug 4967770. | |
| 180 // The minimum alignment to a heap word size is done. Other | |
| 181 // parts of the memory system may required additional alignment | |
| 182 // and are responsible for those alignments. | |
| 183 #ifdef _LP64 | |
| 184 #define ScaleForWordSize(x) align_size_down_((x) * 13 / 10, HeapWordSize) | |
| 185 #else | |
| 186 #define ScaleForWordSize(x) (x) | |
| 187 #endif | |
| 188 | |
| 189 // The minimum number of native machine words necessary to contain "byte_size" | |
| 190 // bytes. | |
| 191 inline size_t heap_word_size(size_t byte_size) { | |
| 192 return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize; | |
| 193 } | |
| 194 | |
| 195 | |
| 196 const size_t K = 1024; | |
| 197 const size_t M = K*K; | |
| 198 const size_t G = M*K; | |
| 199 const size_t HWperKB = K / sizeof(HeapWord); | |
| 200 | |
| 201 const jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint | |
| 202 const jint max_jint = (juint)min_jint - 1; // 0x7FFFFFFF == largest jint | |
| 203 | |
| 204 // Constants for converting from a base unit to milli-base units. For | |
| 205 // example from seconds to milliseconds and microseconds | |
| 206 | |
| 207 const int MILLIUNITS = 1000; // milli units per base unit | |
| 208 const int MICROUNITS = 1000000; // micro units per base unit | |
| 209 const int NANOUNITS = 1000000000; // nano units per base unit | |
| 210 | |
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211 const jlong NANOSECS_PER_SEC = CONST64(1000000000); |
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212 const jint NANOSECS_PER_MILLISEC = 1000000; |
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213 |
| 0 | 214 inline const char* proper_unit_for_byte_size(size_t s) { |
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215 #ifdef _LP64 |
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216 if (s >= 10*G) { |
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217 return "G"; |
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218 } |
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219 #endif |
| 0 | 220 if (s >= 10*M) { |
| 221 return "M"; | |
| 222 } else if (s >= 10*K) { | |
| 223 return "K"; | |
| 224 } else { | |
| 225 return "B"; | |
| 226 } | |
| 227 } | |
| 228 | |
| 6059 | 229 template <class T> |
| 230 inline T byte_size_in_proper_unit(T s) { | |
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231 #ifdef _LP64 |
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232 if (s >= 10*G) { |
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233 return (T)(s/G); |
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234 } |
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235 #endif |
| 0 | 236 if (s >= 10*M) { |
| 6059 | 237 return (T)(s/M); |
| 0 | 238 } else if (s >= 10*K) { |
| 6059 | 239 return (T)(s/K); |
| 0 | 240 } else { |
| 241 return s; | |
| 242 } | |
| 243 } | |
| 244 | |
| 245 //---------------------------------------------------------------------------------------------------- | |
| 246 // VM type definitions | |
| 247 | |
| 248 // intx and uintx are the 'extended' int and 'extended' unsigned int types; | |
| 249 // they are 32bit wide on a 32-bit platform, and 64bit wide on a 64bit platform. | |
| 250 | |
| 251 typedef intptr_t intx; | |
| 252 typedef uintptr_t uintx; | |
| 253 | |
| 254 const intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1); | |
| 255 const intx max_intx = (uintx)min_intx - 1; | |
| 256 const uintx max_uintx = (uintx)-1; | |
| 257 | |
| 258 // Table of values: | |
| 259 // sizeof intx 4 8 | |
| 260 // min_intx 0x80000000 0x8000000000000000 | |
| 261 // max_intx 0x7FFFFFFF 0x7FFFFFFFFFFFFFFF | |
| 262 // max_uintx 0xFFFFFFFF 0xFFFFFFFFFFFFFFFF | |
| 263 | |
| 264 typedef unsigned int uint; NEEDS_CLEANUP | |
| 265 | |
| 266 | |
| 267 //---------------------------------------------------------------------------------------------------- | |
| 268 // Java type definitions | |
| 269 | |
| 270 // All kinds of 'plain' byte addresses | |
| 271 typedef signed char s_char; | |
| 272 typedef unsigned char u_char; | |
| 273 typedef u_char* address; | |
| 274 typedef uintptr_t address_word; // unsigned integer which will hold a pointer | |
| 275 // except for some implementations of a C++ | |
| 276 // linkage pointer to function. Should never | |
| 277 // need one of those to be placed in this | |
| 278 // type anyway. | |
| 279 | |
| 280 // Utility functions to "portably" (?) bit twiddle pointers | |
| 281 // Where portable means keep ANSI C++ compilers quiet | |
| 282 | |
| 283 inline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); } | |
| 284 inline address clear_address_bits(address x, int m) { return address(intptr_t(x) & ~m); } | |
| 285 | |
| 286 // Utility functions to "portably" make cast to/from function pointers. | |
| 287 | |
| 288 inline address_word mask_address_bits(address x, int m) { return address_word(x) & m; } | |
| 289 inline address_word castable_address(address x) { return address_word(x) ; } | |
| 290 inline address_word castable_address(void* x) { return address_word(x) ; } | |
| 291 | |
| 292 // Pointer subtraction. | |
| 293 // The idea here is to avoid ptrdiff_t, which is signed and so doesn't have | |
| 294 // the range we might need to find differences from one end of the heap | |
| 295 // to the other. | |
| 296 // A typical use might be: | |
| 297 // if (pointer_delta(end(), top()) >= size) { | |
| 298 // // enough room for an object of size | |
| 299 // ... | |
| 300 // and then additions like | |
| 301 // ... top() + size ... | |
| 302 // are safe because we know that top() is at least size below end(). | |
| 303 inline size_t pointer_delta(const void* left, | |
| 304 const void* right, | |
| 305 size_t element_size) { | |
| 306 return (((uintptr_t) left) - ((uintptr_t) right)) / element_size; | |
| 307 } | |
| 308 // A version specialized for HeapWord*'s. | |
| 309 inline size_t pointer_delta(const HeapWord* left, const HeapWord* right) { | |
| 310 return pointer_delta(left, right, sizeof(HeapWord)); | |
| 311 } | |
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312 // A version specialized for MetaWord*'s. |
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313 inline size_t pointer_delta(const MetaWord* left, const MetaWord* right) { |
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314 return pointer_delta(left, right, sizeof(MetaWord)); |
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315 } |
| 0 | 316 |
| 317 // | |
| 318 // ANSI C++ does not allow casting from one pointer type to a function pointer | |
| 319 // directly without at best a warning. This macro accomplishes it silently | |
| 320 // In every case that is present at this point the value be cast is a pointer | |
| 321 // to a C linkage function. In somecase the type used for the cast reflects | |
| 322 // that linkage and a picky compiler would not complain. In other cases because | |
| 323 // there is no convenient place to place a typedef with extern C linkage (i.e | |
| 324 // a platform dependent header file) it doesn't. At this point no compiler seems | |
| 325 // picky enough to catch these instances (which are few). It is possible that | |
| 326 // using templates could fix these for all cases. This use of templates is likely | |
| 327 // so far from the middle of the road that it is likely to be problematic in | |
| 328 // many C++ compilers. | |
| 329 // | |
| 330 #define CAST_TO_FN_PTR(func_type, value) ((func_type)(castable_address(value))) | |
| 331 #define CAST_FROM_FN_PTR(new_type, func_ptr) ((new_type)((address_word)(func_ptr))) | |
| 332 | |
| 333 // Unsigned byte types for os and stream.hpp | |
| 334 | |
| 335 // Unsigned one, two, four and eigth byte quantities used for describing | |
| 336 // the .class file format. See JVM book chapter 4. | |
| 337 | |
| 338 typedef jubyte u1; | |
| 339 typedef jushort u2; | |
| 340 typedef juint u4; | |
| 341 typedef julong u8; | |
| 342 | |
| 343 const jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte | |
| 344 const jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort | |
| 345 const juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint | |
| 346 const julong max_julong = (julong)-1; // 0xFF....FF largest julong | |
| 347 | |
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348 typedef jbyte s1; |
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349 typedef jshort s2; |
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350 typedef jint s4; |
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351 typedef jlong s8; |
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352 |
| 0 | 353 //---------------------------------------------------------------------------------------------------- |
| 354 // JVM spec restrictions | |
| 355 | |
| 356 const int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134) | |
| 357 | |
| 12837 | 358 // Default ProtectionDomainCacheSize values |
| 359 | |
| 360 const int defaultProtectionDomainCacheSize = NOT_LP64(137) LP64_ONLY(2017); | |
| 0 | 361 |
| 362 //---------------------------------------------------------------------------------------------------- | |
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363 // Default and minimum StringTableSize values |
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364 |
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365 const int defaultStringTableSize = NOT_LP64(1009) LP64_ONLY(60013); |
| 12837 | 366 const int minimumStringTableSize = 1009; |
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367 |
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368 const int defaultSymbolTableSize = 20011; |
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369 const int minimumSymbolTableSize = 1009; |
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370 |
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371 |
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372 //---------------------------------------------------------------------------------------------------- |
| 0 | 373 // HotSwap - for JVMTI aka Class File Replacement and PopFrame |
| 374 // | |
| 375 // Determines whether on-the-fly class replacement and frame popping are enabled. | |
| 376 | |
| 377 #define HOTSWAP | |
| 378 | |
| 379 //---------------------------------------------------------------------------------------------------- | |
| 380 // Object alignment, in units of HeapWords. | |
| 381 // | |
| 382 // Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and | |
| 383 // reference fields can be naturally aligned. | |
| 384 | |
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385 extern int MinObjAlignment; |
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386 extern int MinObjAlignmentInBytes; |
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387 extern int MinObjAlignmentInBytesMask; |
| 0 | 388 |
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389 extern int LogMinObjAlignment; |
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390 extern int LogMinObjAlignmentInBytes; |
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391 |
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392 const int LogKlassAlignmentInBytes = 3; |
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393 const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize; |
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394 const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes; |
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395 const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize; |
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396 |
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397 // Klass encoding metaspace max size |
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398 const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes; |
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399 |
| 0 | 400 // Machine dependent stuff |
| 401 | |
| 17780 | 402 #if defined(X86) && defined(COMPILER2) && !defined(JAVASE_EMBEDDED) |
| 403 // Include Restricted Transactional Memory lock eliding optimization | |
| 404 #define INCLUDE_RTM_OPT 1 | |
| 405 #define RTM_OPT_ONLY(code) code | |
| 406 #else | |
| 407 #define INCLUDE_RTM_OPT 0 | |
| 408 #define RTM_OPT_ONLY(code) | |
| 409 #endif | |
| 410 // States of Restricted Transactional Memory usage. | |
| 411 enum RTMState { | |
| 412 NoRTM = 0x2, // Don't use RTM | |
| 413 UseRTM = 0x1, // Use RTM | |
| 414 ProfileRTM = 0x0 // Use RTM with abort ratio calculation | |
| 415 }; | |
| 416 | |
| 1972 | 417 #ifdef TARGET_ARCH_x86 |
| 418 # include "globalDefinitions_x86.hpp" | |
| 419 #endif | |
| 420 #ifdef TARGET_ARCH_sparc | |
| 421 # include "globalDefinitions_sparc.hpp" | |
| 422 #endif | |
| 423 #ifdef TARGET_ARCH_zero | |
| 424 # include "globalDefinitions_zero.hpp" | |
| 425 #endif | |
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426 #ifdef TARGET_ARCH_arm |
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427 # include "globalDefinitions_arm.hpp" |
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428 #endif |
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429 #ifdef TARGET_ARCH_ppc |
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430 # include "globalDefinitions_ppc.hpp" |
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431 #endif |
| 1972 | 432 |
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433 /* |
| 11129 | 434 * If a platform does not support native stack walking |
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435 * the platform specific globalDefinitions (above) |
| 11129 | 436 * can set PLATFORM_NATIVE_STACK_WALKING_SUPPORTED to 0 |
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437 */ |
| 11129 | 438 #ifndef PLATFORM_NATIVE_STACK_WALKING_SUPPORTED |
| 439 #define PLATFORM_NATIVE_STACK_WALKING_SUPPORTED 1 | |
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440 #endif |
| 0 | 441 |
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442 // To assure the IRIW property on processors that are not multiple copy |
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443 // atomic, sync instructions must be issued between volatile reads to |
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444 // assure their ordering, instead of after volatile stores. |
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445 // (See "A Tutorial Introduction to the ARM and POWER Relaxed Memory Models" |
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446 // by Luc Maranget, Susmit Sarkar and Peter Sewell, INRIA/Cambridge) |
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447 #ifdef CPU_NOT_MULTIPLE_COPY_ATOMIC |
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448 const bool support_IRIW_for_not_multiple_copy_atomic_cpu = true; |
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449 #else |
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450 const bool support_IRIW_for_not_multiple_copy_atomic_cpu = false; |
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451 #endif |
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452 |
| 0 | 453 // The byte alignment to be used by Arena::Amalloc. See bugid 4169348. |
| 454 // Note: this value must be a power of 2 | |
| 455 | |
| 456 #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord) | |
| 457 | |
| 458 // Signed variants of alignment helpers. There are two versions of each, a macro | |
| 459 // for use in places like enum definitions that require compile-time constant | |
| 460 // expressions and a function for all other places so as to get type checking. | |
| 461 | |
| 462 #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1)) | |
| 463 | |
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464 inline bool is_size_aligned(size_t size, size_t alignment) { |
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465 return align_size_up_(size, alignment) == size; |
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466 } |
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467 |
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468 inline bool is_ptr_aligned(void* ptr, size_t alignment) { |
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469 return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr; |
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470 } |
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471 |
| 0 | 472 inline intptr_t align_size_up(intptr_t size, intptr_t alignment) { |
| 473 return align_size_up_(size, alignment); | |
| 474 } | |
| 475 | |
| 476 #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1)) | |
| 477 | |
| 478 inline intptr_t align_size_down(intptr_t size, intptr_t alignment) { | |
| 479 return align_size_down_(size, alignment); | |
| 480 } | |
| 481 | |
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482 #define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment))) |
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483 |
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484 inline void* align_ptr_up(void* ptr, size_t alignment) { |
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485 return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment); |
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486 } |
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487 |
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488 inline void* align_ptr_down(void* ptr, size_t alignment) { |
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489 return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment); |
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490 } |
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491 |
| 0 | 492 // Align objects by rounding up their size, in HeapWord units. |
| 493 | |
| 494 #define align_object_size_(size) align_size_up_(size, MinObjAlignment) | |
| 495 | |
| 496 inline intptr_t align_object_size(intptr_t size) { | |
| 497 return align_size_up(size, MinObjAlignment); | |
| 498 } | |
| 499 | |
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500 inline bool is_object_aligned(intptr_t addr) { |
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501 return addr == align_object_size(addr); |
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502 } |
| 0 | 503 |
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504 // Pad out certain offsets to jlong alignment, in HeapWord units. |
| 0 | 505 |
| 506 inline intptr_t align_object_offset(intptr_t offset) { | |
| 507 return align_size_up(offset, HeapWordsPerLong); | |
| 508 } | |
| 509 | |
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510 inline void* align_pointer_up(const void* addr, size_t size) { |
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511 return (void*) align_size_up_((uintptr_t)addr, size); |
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512 } |
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513 |
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514 // Align down with a lower bound. If the aligning results in 0, return 'alignment'. |
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515 |
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516 inline size_t align_size_down_bounded(size_t size, size_t alignment) { |
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517 size_t aligned_size = align_size_down_(size, alignment); |
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518 return aligned_size > 0 ? aligned_size : alignment; |
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519 } |
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520 |
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521 // Clamp an address to be within a specific page |
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522 // 1. If addr is on the page it is returned as is |
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523 // 2. If addr is above the page_address the start of the *next* page will be returned |
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524 // 3. Otherwise, if addr is below the page_address the start of the page will be returned |
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525 inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) { |
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526 if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) { |
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527 // address is in the specified page, just return it as is |
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528 return addr; |
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529 } else if (addr > page_address) { |
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530 // address is above specified page, return start of next page |
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531 return (address)align_size_down(intptr_t(page_address), page_size) + page_size; |
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532 } else { |
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533 // address is below specified page, return start of page |
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534 return (address)align_size_down(intptr_t(page_address), page_size); |
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535 } |
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536 } |
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537 |
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538 |
| 1665 | 539 // The expected size in bytes of a cache line, used to pad data structures. |
| 540 #define DEFAULT_CACHE_LINE_SIZE 64 | |
| 541 | |
| 0 | 542 |
| 543 //---------------------------------------------------------------------------------------------------- | |
| 544 // Utility macros for compilers | |
| 545 // used to silence compiler warnings | |
| 546 | |
| 547 #define Unused_Variable(var) var | |
| 548 | |
| 549 | |
| 550 //---------------------------------------------------------------------------------------------------- | |
| 551 // Miscellaneous | |
| 552 | |
| 553 // 6302670 Eliminate Hotspot __fabsf dependency | |
| 554 // All fabs() callers should call this function instead, which will implicitly | |
| 555 // convert the operand to double, avoiding a dependency on __fabsf which | |
| 556 // doesn't exist in early versions of Solaris 8. | |
| 557 inline double fabsd(double value) { | |
| 558 return fabs(value); | |
| 559 } | |
| 560 | |
| 561 inline jint low (jlong value) { return jint(value); } | |
| 562 inline jint high(jlong value) { return jint(value >> 32); } | |
| 563 | |
| 564 // the fancy casts are a hopefully portable way | |
| 565 // to do unsigned 32 to 64 bit type conversion | |
| 566 inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32; | |
| 567 *value |= (jlong)(julong)(juint)low; } | |
| 568 | |
| 569 inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff; | |
| 570 *value |= (jlong)high << 32; } | |
| 571 | |
| 572 inline jlong jlong_from(jint h, jint l) { | |
| 573 jlong result = 0; // initialization to avoid warning | |
| 574 set_high(&result, h); | |
| 575 set_low(&result, l); | |
| 576 return result; | |
| 577 } | |
| 578 | |
| 579 union jlong_accessor { | |
| 580 jint words[2]; | |
| 581 jlong long_value; | |
| 582 }; | |
| 583 | |
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584 void basic_types_init(); // cannot define here; uses assert |
| 0 | 585 |
| 586 | |
| 587 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java | |
| 588 enum BasicType { | |
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589 T_BOOLEAN = 4, |
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590 T_CHAR = 5, |
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591 T_FLOAT = 6, |
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592 T_DOUBLE = 7, |
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593 T_BYTE = 8, |
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594 T_SHORT = 9, |
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595 T_INT = 10, |
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596 T_LONG = 11, |
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597 T_OBJECT = 12, |
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598 T_ARRAY = 13, |
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599 T_VOID = 14, |
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600 T_ADDRESS = 15, |
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601 T_NARROWOOP = 16, |
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602 T_METADATA = 17, |
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603 T_NARROWKLASS = 18, |
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604 T_CONFLICT = 19, // for stack value type with conflicting contents |
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605 T_ILLEGAL = 99 |
| 0 | 606 }; |
| 607 | |
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608 inline bool is_java_primitive(BasicType t) { |
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609 return T_BOOLEAN <= t && t <= T_LONG; |
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610 } |
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611 |
| 710 | 612 inline bool is_subword_type(BasicType t) { |
| 613 // these guys are processed exactly like T_INT in calling sequences: | |
| 614 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT); | |
| 615 } | |
| 616 | |
| 617 inline bool is_signed_subword_type(BasicType t) { | |
| 618 return (t == T_BYTE || t == T_SHORT); | |
| 619 } | |
| 620 | |
| 0 | 621 // Convert a char from a classfile signature to a BasicType |
| 622 inline BasicType char2type(char c) { | |
| 623 switch( c ) { | |
| 624 case 'B': return T_BYTE; | |
| 625 case 'C': return T_CHAR; | |
| 626 case 'D': return T_DOUBLE; | |
| 627 case 'F': return T_FLOAT; | |
| 628 case 'I': return T_INT; | |
| 629 case 'J': return T_LONG; | |
| 630 case 'S': return T_SHORT; | |
| 631 case 'Z': return T_BOOLEAN; | |
| 632 case 'V': return T_VOID; | |
| 633 case 'L': return T_OBJECT; | |
| 634 case '[': return T_ARRAY; | |
| 635 } | |
| 636 return T_ILLEGAL; | |
| 637 } | |
| 638 | |
| 639 extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar | |
| 640 inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; } | |
| 641 extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements | |
| 642 extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar | |
| 643 inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; } | |
| 644 extern BasicType name2type(const char* name); | |
| 645 | |
| 646 // Auxilary math routines | |
| 647 // least common multiple | |
| 648 extern size_t lcm(size_t a, size_t b); | |
| 649 | |
| 650 | |
| 651 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java | |
| 652 enum BasicTypeSize { | |
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653 T_BOOLEAN_size = 1, |
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654 T_CHAR_size = 1, |
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655 T_FLOAT_size = 1, |
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656 T_DOUBLE_size = 2, |
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657 T_BYTE_size = 1, |
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658 T_SHORT_size = 1, |
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659 T_INT_size = 1, |
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660 T_LONG_size = 2, |
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661 T_OBJECT_size = 1, |
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662 T_ARRAY_size = 1, |
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663 T_NARROWOOP_size = 1, |
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664 T_NARROWKLASS_size = 1, |
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665 T_VOID_size = 0 |
| 0 | 666 }; |
| 667 | |
| 668 | |
| 669 // maps a BasicType to its instance field storage type: | |
| 670 // all sub-word integral types are widened to T_INT | |
| 671 extern BasicType type2field[T_CONFLICT+1]; | |
| 672 extern BasicType type2wfield[T_CONFLICT+1]; | |
| 673 | |
| 674 | |
| 675 // size in bytes | |
| 676 enum ArrayElementSize { | |
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677 T_BOOLEAN_aelem_bytes = 1, |
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678 T_CHAR_aelem_bytes = 2, |
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679 T_FLOAT_aelem_bytes = 4, |
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680 T_DOUBLE_aelem_bytes = 8, |
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681 T_BYTE_aelem_bytes = 1, |
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682 T_SHORT_aelem_bytes = 2, |
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683 T_INT_aelem_bytes = 4, |
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684 T_LONG_aelem_bytes = 8, |
| 0 | 685 #ifdef _LP64 |
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686 T_OBJECT_aelem_bytes = 8, |
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687 T_ARRAY_aelem_bytes = 8, |
| 0 | 688 #else |
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689 T_OBJECT_aelem_bytes = 4, |
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690 T_ARRAY_aelem_bytes = 4, |
| 0 | 691 #endif |
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692 T_NARROWOOP_aelem_bytes = 4, |
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693 T_NARROWKLASS_aelem_bytes = 4, |
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694 T_VOID_aelem_bytes = 0 |
| 0 | 695 }; |
| 696 | |
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697 extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element |
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698 #ifdef ASSERT |
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699 extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts |
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700 #else |
| 1763 | 701 inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; } |
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702 #endif |
| 0 | 703 |
| 704 | |
| 705 // JavaValue serves as a container for arbitrary Java values. | |
| 706 | |
| 707 class JavaValue { | |
| 708 | |
| 709 public: | |
| 710 typedef union JavaCallValue { | |
| 711 jfloat f; | |
| 712 jdouble d; | |
| 713 jint i; | |
| 714 jlong l; | |
| 715 jobject h; | |
| 716 } JavaCallValue; | |
| 717 | |
| 718 private: | |
| 719 BasicType _type; | |
| 720 JavaCallValue _value; | |
| 721 | |
| 722 public: | |
| 723 JavaValue(BasicType t = T_ILLEGAL) { _type = t; } | |
| 724 | |
| 725 JavaValue(jfloat value) { | |
| 726 _type = T_FLOAT; | |
| 727 _value.f = value; | |
| 728 } | |
| 729 | |
| 730 JavaValue(jdouble value) { | |
| 731 _type = T_DOUBLE; | |
| 732 _value.d = value; | |
| 733 } | |
| 734 | |
| 735 jfloat get_jfloat() const { return _value.f; } | |
| 736 jdouble get_jdouble() const { return _value.d; } | |
| 737 jint get_jint() const { return _value.i; } | |
| 738 jlong get_jlong() const { return _value.l; } | |
| 739 jobject get_jobject() const { return _value.h; } | |
| 740 JavaCallValue* get_value_addr() { return &_value; } | |
| 741 BasicType get_type() const { return _type; } | |
| 742 | |
| 743 void set_jfloat(jfloat f) { _value.f = f;} | |
| 744 void set_jdouble(jdouble d) { _value.d = d;} | |
| 745 void set_jint(jint i) { _value.i = i;} | |
| 746 void set_jlong(jlong l) { _value.l = l;} | |
| 747 void set_jobject(jobject h) { _value.h = h;} | |
| 748 void set_type(BasicType t) { _type = t; } | |
| 749 | |
| 750 jboolean get_jboolean() const { return (jboolean) (_value.i);} | |
| 751 jbyte get_jbyte() const { return (jbyte) (_value.i);} | |
| 752 jchar get_jchar() const { return (jchar) (_value.i);} | |
| 753 jshort get_jshort() const { return (jshort) (_value.i);} | |
| 754 | |
| 755 }; | |
| 756 | |
| 757 | |
| 758 #define STACK_BIAS 0 | |
| 759 // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff | |
| 760 // in order to extend the reach of the stack pointer. | |
| 761 #if defined(SPARC) && defined(_LP64) | |
| 762 #undef STACK_BIAS | |
| 763 #define STACK_BIAS 0x7ff | |
| 764 #endif | |
| 765 | |
| 766 | |
| 767 // TosState describes the top-of-stack state before and after the execution of | |
| 768 // a bytecode or method. The top-of-stack value may be cached in one or more CPU | |
| 769 // registers. The TosState corresponds to the 'machine represention' of this cached | |
| 770 // value. There's 4 states corresponding to the JAVA types int, long, float & double | |
| 771 // as well as a 5th state in case the top-of-stack value is actually on the top | |
| 772 // of stack (in memory) and thus not cached. The atos state corresponds to the itos | |
| 773 // state when it comes to machine representation but is used separately for (oop) | |
| 774 // type specific operations (e.g. verification code). | |
| 775 | |
| 776 enum TosState { // describes the tos cache contents | |
| 777 btos = 0, // byte, bool tos cached | |
|
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778 ctos = 1, // char tos cached |
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779 stos = 2, // short tos cached |
| 0 | 780 itos = 3, // int tos cached |
| 781 ltos = 4, // long tos cached | |
| 782 ftos = 5, // float tos cached | |
| 783 dtos = 6, // double tos cached | |
| 784 atos = 7, // object cached | |
| 785 vtos = 8, // tos not cached | |
| 786 number_of_states, | |
| 787 ilgl // illegal state: should not occur | |
| 788 }; | |
| 789 | |
| 790 | |
| 791 inline TosState as_TosState(BasicType type) { | |
| 792 switch (type) { | |
| 793 case T_BYTE : return btos; | |
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794 case T_BOOLEAN: return btos; // FIXME: Add ztos |
| 0 | 795 case T_CHAR : return ctos; |
| 796 case T_SHORT : return stos; | |
| 797 case T_INT : return itos; | |
| 798 case T_LONG : return ltos; | |
| 799 case T_FLOAT : return ftos; | |
| 800 case T_DOUBLE : return dtos; | |
| 801 case T_VOID : return vtos; | |
| 802 case T_ARRAY : // fall through | |
| 803 case T_OBJECT : return atos; | |
| 804 } | |
| 805 return ilgl; | |
| 806 } | |
| 807 | |
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808 inline BasicType as_BasicType(TosState state) { |
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809 switch (state) { |
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810 //case ztos: return T_BOOLEAN;//FIXME |
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811 case btos : return T_BYTE; |
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812 case ctos : return T_CHAR; |
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813 case stos : return T_SHORT; |
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814 case itos : return T_INT; |
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815 case ltos : return T_LONG; |
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816 case ftos : return T_FLOAT; |
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817 case dtos : return T_DOUBLE; |
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818 case atos : return T_OBJECT; |
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819 case vtos : return T_VOID; |
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820 } |
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821 return T_ILLEGAL; |
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822 } |
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823 |
| 0 | 824 |
| 825 // Helper function to convert BasicType info into TosState | |
| 826 // Note: Cannot define here as it uses global constant at the time being. | |
| 827 TosState as_TosState(BasicType type); | |
| 828 | |
| 829 | |
| 830 // JavaThreadState keeps track of which part of the code a thread is executing in. This | |
| 831 // information is needed by the safepoint code. | |
| 832 // | |
| 833 // There are 4 essential states: | |
| 834 // | |
| 835 // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code) | |
| 836 // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles | |
| 837 // _thread_in_vm : Executing in the vm | |
| 838 // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub) | |
| 839 // | |
| 840 // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in | |
| 841 // a transition from one state to another. These extra states makes it possible for the safepoint code to | |
| 842 // handle certain thread_states without having to suspend the thread - making the safepoint code faster. | |
| 843 // | |
| 844 // Given a state, the xxx_trans state can always be found by adding 1. | |
| 845 // | |
| 846 enum JavaThreadState { | |
| 847 _thread_uninitialized = 0, // should never happen (missing initialization) | |
| 848 _thread_new = 2, // just starting up, i.e., in process of being initialized | |
| 849 _thread_new_trans = 3, // corresponding transition state (not used, included for completness) | |
| 850 _thread_in_native = 4, // running in native code | |
| 851 _thread_in_native_trans = 5, // corresponding transition state | |
| 852 _thread_in_vm = 6, // running in VM | |
| 853 _thread_in_vm_trans = 7, // corresponding transition state | |
| 854 _thread_in_Java = 8, // running in Java or in stub code | |
| 855 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness) | |
| 856 _thread_blocked = 10, // blocked in vm | |
| 857 _thread_blocked_trans = 11, // corresponding transition state | |
| 858 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation | |
| 859 }; | |
| 860 | |
| 861 | |
| 862 // Handy constants for deciding which compiler mode to use. | |
| 863 enum MethodCompilation { | |
| 864 InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation | |
| 865 InvalidOSREntryBci = -2 | |
| 866 }; | |
| 867 | |
| 868 // Enumeration to distinguish tiers of compilation | |
| 869 enum CompLevel { | |
| 1783 | 870 CompLevel_any = -1, |
| 871 CompLevel_all = -1, | |
| 872 CompLevel_none = 0, // Interpreter | |
| 873 CompLevel_simple = 1, // C1 | |
| 874 CompLevel_limited_profile = 2, // C1, invocation & backedge counters | |
| 875 CompLevel_full_profile = 3, // C1, invocation & backedge counters + mdo | |
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876 CompLevel_full_optimization = 4, // C2, Shark or Graal |
| 0 | 877 |
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878 #if defined(COMPILER2) || defined(SHARK) || defined(COMPILERGRAAL) |
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879 CompLevel_highest_tier = CompLevel_full_optimization, // pure C2 and tiered or Graal and tiered |
| 1783 | 880 #elif defined(COMPILER1) |
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881 CompLevel_highest_tier = CompLevel_simple, // pure C1 or Graal |
| 0 | 882 #else |
| 1783 | 883 CompLevel_highest_tier = CompLevel_none, |
| 884 #endif | |
| 885 | |
| 886 #if defined(TIERED) | |
| 887 CompLevel_initial_compile = CompLevel_full_profile // tiered | |
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888 #elif defined(COMPILER1) || defined(COMPILERGRAAL) |
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889 CompLevel_initial_compile = CompLevel_simple // pure C1 or Graal |
| 2447 | 890 #elif defined(COMPILER2) || defined(SHARK) |
| 1783 | 891 CompLevel_initial_compile = CompLevel_full_optimization // pure C2 |
| 892 #else | |
| 893 CompLevel_initial_compile = CompLevel_none | |
| 894 #endif | |
| 0 | 895 }; |
| 896 | |
| 1783 | 897 inline bool is_c1_compile(int comp_level) { |
| 898 return comp_level > CompLevel_none && comp_level < CompLevel_full_optimization; | |
| 0 | 899 } |
| 1783 | 900 |
| 901 inline bool is_c2_compile(int comp_level) { | |
| 0 | 902 return comp_level == CompLevel_full_optimization; |
| 903 } | |
| 1783 | 904 |
| 0 | 905 inline bool is_highest_tier_compile(int comp_level) { |
| 906 return comp_level == CompLevel_highest_tier; | |
| 907 } | |
| 908 | |
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909 inline bool is_compile(int comp_level) { |
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910 return is_c1_compile(comp_level) || is_c2_compile(comp_level); |
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911 } |
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912 |
| 0 | 913 //---------------------------------------------------------------------------------------------------- |
| 914 // 'Forward' declarations of frequently used classes | |
| 915 // (in order to reduce interface dependencies & reduce | |
| 916 // number of unnecessary compilations after changes) | |
| 917 | |
| 918 class symbolTable; | |
| 919 class ClassFileStream; | |
| 920 | |
| 921 class Event; | |
| 922 | |
| 923 class Thread; | |
| 924 class VMThread; | |
| 925 class JavaThread; | |
| 926 class Threads; | |
| 927 | |
| 928 class VM_Operation; | |
| 929 class VMOperationQueue; | |
| 930 | |
| 931 class CodeBlob; | |
| 932 class nmethod; | |
| 933 class OSRAdapter; | |
| 934 class I2CAdapter; | |
| 935 class C2IAdapter; | |
| 936 class CompiledIC; | |
| 937 class relocInfo; | |
| 938 class ScopeDesc; | |
| 939 class PcDesc; | |
| 940 | |
| 941 class Recompiler; | |
| 942 class Recompilee; | |
| 943 class RecompilationPolicy; | |
| 944 class RFrame; | |
| 945 class CompiledRFrame; | |
| 946 class InterpretedRFrame; | |
| 947 | |
| 948 class frame; | |
| 949 | |
| 950 class vframe; | |
| 951 class javaVFrame; | |
| 952 class interpretedVFrame; | |
| 953 class compiledVFrame; | |
| 954 class deoptimizedVFrame; | |
| 955 class externalVFrame; | |
| 956 class entryVFrame; | |
| 957 | |
| 958 class RegisterMap; | |
| 959 | |
| 960 class Mutex; | |
| 961 class Monitor; | |
| 962 class BasicLock; | |
| 963 class BasicObjectLock; | |
| 964 | |
| 965 class PeriodicTask; | |
| 966 | |
| 967 class JavaCallWrapper; | |
| 968 | |
| 969 class oopDesc; | |
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970 class metaDataOopDesc; |
| 0 | 971 |
| 972 class NativeCall; | |
| 973 | |
| 974 class zone; | |
| 975 | |
| 976 class StubQueue; | |
| 977 | |
| 978 class outputStream; | |
| 979 | |
| 980 class ResourceArea; | |
| 981 | |
| 982 class DebugInformationRecorder; | |
| 983 class ScopeValue; | |
| 984 class CompressedStream; | |
| 985 class DebugInfoReadStream; | |
| 986 class DebugInfoWriteStream; | |
| 987 class LocationValue; | |
| 988 class ConstantValue; | |
| 989 class IllegalValue; | |
| 990 | |
| 991 class PrivilegedElement; | |
| 992 class MonitorArray; | |
| 993 | |
| 994 class MonitorInfo; | |
| 995 | |
| 996 class OffsetClosure; | |
| 997 class OopMapCache; | |
| 998 class InterpreterOopMap; | |
| 999 class OopMapCacheEntry; | |
| 1000 class OSThread; | |
| 1001 | |
| 1002 typedef int (*OSThreadStartFunc)(void*); | |
| 1003 | |
| 1004 class Space; | |
| 1005 | |
| 1006 class JavaValue; | |
| 1007 class methodHandle; | |
| 1008 class JavaCallArguments; | |
| 1009 | |
| 1010 // Basic support for errors (general debug facilities not defined at this point fo the include phase) | |
| 1011 | |
| 1012 extern void basic_fatal(const char* msg); | |
| 1013 | |
| 1014 | |
| 1015 //---------------------------------------------------------------------------------------------------- | |
| 1016 // Special constants for debugging | |
| 1017 | |
| 1018 const jint badInt = -3; // generic "bad int" value | |
| 1019 const long badAddressVal = -2; // generic "bad address" value | |
| 1020 const long badOopVal = -1; // generic "bad oop" value | |
| 1021 const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC | |
| 1022 const int badHandleValue = 0xBC; // value used to zap vm handle area | |
| 1023 const int badResourceValue = 0xAB; // value used to zap resource area | |
| 1024 const int freeBlockPad = 0xBA; // value used to pad freed blocks. | |
| 1025 const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks. | |
| 1026 const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area | |
| 1027 const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC | |
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1028 const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC |
| 0 | 1029 const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation |
| 1030 const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation | |
| 1031 | |
| 1032 | |
| 1033 // (These must be implemented as #defines because C++ compilers are | |
| 1034 // not obligated to inline non-integral constants!) | |
| 1035 #define badAddress ((address)::badAddressVal) | |
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1036 #define badOop (cast_to_oop(::badOopVal)) |
| 0 | 1037 #define badHeapWord (::badHeapWordVal) |
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1038 #define badJNIHandle (cast_to_oop(::badJNIHandleVal)) |
| 0 | 1039 |
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1040 // Default TaskQueue size is 16K (32-bit) or 128K (64-bit) |
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1041 #define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17)) |
| 0 | 1042 |
| 1043 //---------------------------------------------------------------------------------------------------- | |
| 1044 // Utility functions for bitfield manipulations | |
| 1045 | |
| 1046 const intptr_t AllBits = ~0; // all bits set in a word | |
| 1047 const intptr_t NoBits = 0; // no bits set in a word | |
| 1048 const jlong NoLongBits = 0; // no bits set in a long | |
| 1049 const intptr_t OneBit = 1; // only right_most bit set in a word | |
| 1050 | |
| 1051 // get a word with the n.th or the right-most or left-most n bits set | |
| 1052 // (note: #define used only so that they can be used in enum constant definitions) | |
| 1053 #define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n)) | |
| 1054 #define right_n_bits(n) (nth_bit(n) - 1) | |
| 1055 #define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n))) | |
| 1056 | |
| 1057 // bit-operations using a mask m | |
| 1058 inline void set_bits (intptr_t& x, intptr_t m) { x |= m; } | |
| 1059 inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; } | |
| 1060 inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; } | |
| 1061 inline jlong mask_long_bits (jlong x, jlong m) { return x & m; } | |
| 1062 inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; } | |
| 1063 | |
| 1064 // bit-operations using the n.th bit | |
| 1065 inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); } | |
| 1066 inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); } | |
| 1067 inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; } | |
| 1068 | |
| 1069 // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!) | |
| 1070 inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) { | |
| 1071 return mask_bits(x >> start_bit_no, right_n_bits(field_length)); | |
| 1072 } | |
| 1073 | |
| 1074 | |
| 1075 //---------------------------------------------------------------------------------------------------- | |
| 1076 // Utility functions for integers | |
| 1077 | |
| 1078 // Avoid use of global min/max macros which may cause unwanted double | |
| 1079 // evaluation of arguments. | |
| 1080 #ifdef max | |
| 1081 #undef max | |
| 1082 #endif | |
| 1083 | |
| 1084 #ifdef min | |
| 1085 #undef min | |
| 1086 #endif | |
| 1087 | |
| 1088 #define max(a,b) Do_not_use_max_use_MAX2_instead | |
| 1089 #define min(a,b) Do_not_use_min_use_MIN2_instead | |
| 1090 | |
| 1091 // It is necessary to use templates here. Having normal overloaded | |
| 1092 // functions does not work because it is necessary to provide both 32- | |
| 1093 // and 64-bit overloaded functions, which does not work, and having | |
| 1094 // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L) | |
| 1095 // will be even more error-prone than macros. | |
| 1096 template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; } | |
| 1097 template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; } | |
| 1098 template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); } | |
| 1099 template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); } | |
| 1100 template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); } | |
| 1101 template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); } | |
| 1102 | |
| 1103 template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; } | |
| 1104 | |
| 1105 // true if x is a power of 2, false otherwise | |
| 1106 inline bool is_power_of_2(intptr_t x) { | |
| 1107 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits)); | |
| 1108 } | |
| 1109 | |
| 1110 // long version of is_power_of_2 | |
| 1111 inline bool is_power_of_2_long(jlong x) { | |
| 1112 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits)); | |
| 1113 } | |
| 1114 | |
| 1115 //* largest i such that 2^i <= x | |
| 1116 // A negative value of 'x' will return '31' | |
| 1117 inline int log2_intptr(intptr_t x) { | |
| 1118 int i = -1; | |
| 1119 uintptr_t p = 1; | |
| 1120 while (p != 0 && p <= (uintptr_t)x) { | |
| 1121 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) | |
| 1122 i++; p *= 2; | |
| 1123 } | |
| 1124 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) | |
| 605 | 1125 // (if p = 0 then overflow occurred and i = 31) |
| 0 | 1126 return i; |
| 1127 } | |
| 1128 | |
| 1129 //* largest i such that 2^i <= x | |
| 1130 // A negative value of 'x' will return '63' | |
| 1131 inline int log2_long(jlong x) { | |
| 1132 int i = -1; | |
| 1133 julong p = 1; | |
| 1134 while (p != 0 && p <= (julong)x) { | |
| 1135 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) | |
| 1136 i++; p *= 2; | |
| 1137 } | |
| 1138 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) | |
| 605 | 1139 // (if p = 0 then overflow occurred and i = 63) |
| 0 | 1140 return i; |
| 1141 } | |
| 1142 | |
| 1143 //* the argument must be exactly a power of 2 | |
| 1144 inline int exact_log2(intptr_t x) { | |
| 1145 #ifdef ASSERT | |
| 1146 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2"); | |
| 1147 #endif | |
| 1148 return log2_intptr(x); | |
| 1149 } | |
| 1150 | |
|
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1151 //* the argument must be exactly a power of 2 |
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|
1152 inline int exact_log2_long(jlong x) { |
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1153 #ifdef ASSERT |
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1154 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2"); |
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1155 #endif |
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1156 return log2_long(x); |
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1157 } |
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1158 |
| 0 | 1159 |
| 1160 // returns integer round-up to the nearest multiple of s (s must be a power of two) | |
| 1161 inline intptr_t round_to(intptr_t x, uintx s) { | |
| 1162 #ifdef ASSERT | |
| 1163 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); | |
| 1164 #endif | |
| 1165 const uintx m = s - 1; | |
| 1166 return mask_bits(x + m, ~m); | |
| 1167 } | |
| 1168 | |
| 1169 // returns integer round-down to the nearest multiple of s (s must be a power of two) | |
| 1170 inline intptr_t round_down(intptr_t x, uintx s) { | |
| 1171 #ifdef ASSERT | |
| 1172 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); | |
| 1173 #endif | |
| 1174 const uintx m = s - 1; | |
| 1175 return mask_bits(x, ~m); | |
| 1176 } | |
| 1177 | |
| 1178 | |
| 1179 inline bool is_odd (intx x) { return x & 1; } | |
| 1180 inline bool is_even(intx x) { return !is_odd(x); } | |
| 1181 | |
| 1182 // "to" should be greater than "from." | |
| 1183 inline intx byte_size(void* from, void* to) { | |
| 1184 return (address)to - (address)from; | |
| 1185 } | |
| 1186 | |
| 1187 //---------------------------------------------------------------------------------------------------- | |
| 1188 // Avoid non-portable casts with these routines (DEPRECATED) | |
| 1189 | |
| 1190 // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE | |
| 1191 // Bytes is optimized machine-specifically and may be much faster then the portable routines below. | |
| 1192 | |
| 1193 // Given sequence of four bytes, build into a 32-bit word | |
| 1194 // following the conventions used in class files. | |
| 1195 // On the 386, this could be realized with a simple address cast. | |
| 1196 // | |
| 1197 | |
| 1198 // This routine takes eight bytes: | |
| 1199 inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { | |
|
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1200 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 )) |
|
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1201 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 )) |
|
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1202 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 )) |
|
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1203 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 )) |
|
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1204 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 )) |
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1205 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 )) |
|
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1206 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 )) |
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1207 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 )); |
| 0 | 1208 } |
| 1209 | |
| 1210 // This routine takes four bytes: | |
| 1211 inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { | |
|
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1212 return (( u4(c1) << 24 ) & 0xff000000) |
|
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1213 | (( u4(c2) << 16 ) & 0x00ff0000) |
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1214 | (( u4(c3) << 8 ) & 0x0000ff00) |
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|
1215 | (( u4(c4) << 0 ) & 0x000000ff); |
| 0 | 1216 } |
| 1217 | |
| 1218 // And this one works if the four bytes are contiguous in memory: | |
| 1219 inline u4 build_u4_from( u1* p ) { | |
| 1220 return build_u4_from( p[0], p[1], p[2], p[3] ); | |
| 1221 } | |
| 1222 | |
| 1223 // Ditto for two-byte ints: | |
| 1224 inline u2 build_u2_from( u1 c1, u1 c2 ) { | |
|
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1225 return u2((( u2(c1) << 8 ) & 0xff00) |
|
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|
1226 | (( u2(c2) << 0 ) & 0x00ff)); |
| 0 | 1227 } |
| 1228 | |
| 1229 // And this one works if the two bytes are contiguous in memory: | |
| 1230 inline u2 build_u2_from( u1* p ) { | |
| 1231 return build_u2_from( p[0], p[1] ); | |
| 1232 } | |
| 1233 | |
| 1234 // Ditto for floats: | |
| 1235 inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { | |
| 1236 u4 u = build_u4_from( c1, c2, c3, c4 ); | |
| 1237 return *(jfloat*)&u; | |
| 1238 } | |
| 1239 | |
| 1240 inline jfloat build_float_from( u1* p ) { | |
| 1241 u4 u = build_u4_from( p ); | |
| 1242 return *(jfloat*)&u; | |
| 1243 } | |
| 1244 | |
| 1245 | |
| 1246 // now (64-bit) longs | |
| 1247 | |
| 1248 inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { | |
|
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1249 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 )) |
|
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1250 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 )) |
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1251 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 )) |
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1252 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 )) |
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1253 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 )) |
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1254 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 )) |
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1255 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 )) |
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|
1256 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 )); |
| 0 | 1257 } |
| 1258 | |
| 1259 inline jlong build_long_from( u1* p ) { | |
| 1260 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] ); | |
| 1261 } | |
| 1262 | |
| 1263 | |
| 1264 // Doubles, too! | |
| 1265 inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { | |
| 1266 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 ); | |
| 1267 return *(jdouble*)&u; | |
| 1268 } | |
| 1269 | |
| 1270 inline jdouble build_double_from( u1* p ) { | |
| 1271 jlong u = build_long_from( p ); | |
| 1272 return *(jdouble*)&u; | |
| 1273 } | |
| 1274 | |
| 1275 | |
| 1276 // Portable routines to go the other way: | |
| 1277 | |
| 1278 inline void explode_short_to( u2 x, u1& c1, u1& c2 ) { | |
| 1279 c1 = u1(x >> 8); | |
| 1280 c2 = u1(x); | |
| 1281 } | |
| 1282 | |
| 1283 inline void explode_short_to( u2 x, u1* p ) { | |
| 1284 explode_short_to( x, p[0], p[1]); | |
| 1285 } | |
| 1286 | |
| 1287 inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) { | |
| 1288 c1 = u1(x >> 24); | |
| 1289 c2 = u1(x >> 16); | |
| 1290 c3 = u1(x >> 8); | |
| 1291 c4 = u1(x); | |
| 1292 } | |
| 1293 | |
| 1294 inline void explode_int_to( u4 x, u1* p ) { | |
| 1295 explode_int_to( x, p[0], p[1], p[2], p[3]); | |
| 1296 } | |
| 1297 | |
| 1298 | |
| 1299 // Pack and extract shorts to/from ints: | |
| 1300 | |
| 1301 inline int extract_low_short_from_int(jint x) { | |
| 1302 return x & 0xffff; | |
| 1303 } | |
| 1304 | |
| 1305 inline int extract_high_short_from_int(jint x) { | |
| 1306 return (x >> 16) & 0xffff; | |
| 1307 } | |
| 1308 | |
| 1309 inline int build_int_from_shorts( jushort low, jushort high ) { | |
| 1310 return ((int)((unsigned int)high << 16) | (unsigned int)low); | |
| 1311 } | |
| 1312 | |
|
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1313 // Convert pointer to intptr_t, for use in printing pointers. |
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1314 inline intptr_t p2i(const void * p) { |
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1315 return (intptr_t) p; |
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1316 } |
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1317 |
| 0 | 1318 // Printf-style formatters for fixed- and variable-width types as pointers and |
| 3960 | 1319 // integers. These are derived from the definitions in inttypes.h. If the platform |
| 1320 // doesn't provide appropriate definitions, they should be provided in | |
| 1321 // the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp) | |
| 0 | 1322 |
| 2361 | 1323 #define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false") |
| 2152 | 1324 |
| 0 | 1325 // Format 32-bit quantities. |
| 3960 | 1326 #define INT32_FORMAT "%" PRId32 |
| 1327 #define UINT32_FORMAT "%" PRIu32 | |
| 1328 #define INT32_FORMAT_W(width) "%" #width PRId32 | |
| 1329 #define UINT32_FORMAT_W(width) "%" #width PRIu32 | |
| 0 | 1330 |
| 3960 | 1331 #define PTR32_FORMAT "0x%08" PRIx32 |
| 0 | 1332 |
| 1333 // Format 64-bit quantities. | |
| 3960 | 1334 #define INT64_FORMAT "%" PRId64 |
| 1335 #define UINT64_FORMAT "%" PRIu64 | |
|
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1336 #define UINT64_FORMAT_X "%" PRIx64 |
| 3960 | 1337 #define INT64_FORMAT_W(width) "%" #width PRId64 |
| 1338 #define UINT64_FORMAT_W(width) "%" #width PRIu64 | |
| 0 | 1339 |
| 3960 | 1340 #define PTR64_FORMAT "0x%016" PRIx64 |
| 0 | 1341 |
|
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1342 // Format jlong, if necessary |
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1343 #ifndef JLONG_FORMAT |
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1344 #define JLONG_FORMAT INT64_FORMAT |
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1345 #endif |
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1346 #ifndef JULONG_FORMAT |
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1347 #define JULONG_FORMAT UINT64_FORMAT |
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1348 #endif |
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1349 |
| 3960 | 1350 // Format pointers which change size between 32- and 64-bit. |
| 0 | 1351 #ifdef _LP64 |
| 3960 | 1352 #define INTPTR_FORMAT "0x%016" PRIxPTR |
| 1353 #define PTR_FORMAT "0x%016" PRIxPTR | |
| 0 | 1354 #else // !_LP64 |
| 3960 | 1355 #define INTPTR_FORMAT "0x%08" PRIxPTR |
| 1356 #define PTR_FORMAT "0x%08" PRIxPTR | |
| 0 | 1357 #endif // _LP64 |
| 1358 | |
|
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1359 #define INTPTR_FORMAT_W(width) "%" #width PRIxPTR |
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1360 |
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1361 #define SSIZE_FORMAT "%" PRIdPTR |
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1362 #define SIZE_FORMAT "%" PRIuPTR |
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1363 #define SIZE_FORMAT_HEX "0x%" PRIxPTR |
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1364 #define SSIZE_FORMAT_W(width) "%" #width PRIdPTR |
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1365 #define SIZE_FORMAT_W(width) "%" #width PRIuPTR |
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1366 #define SIZE_FORMAT_HEX_W(width) "0x%" #width PRIxPTR |
| 3960 | 1367 |
| 1368 #define INTX_FORMAT "%" PRIdPTR | |
| 1369 #define UINTX_FORMAT "%" PRIuPTR | |
| 1370 #define INTX_FORMAT_W(width) "%" #width PRIdPTR | |
| 1371 #define UINTX_FORMAT_W(width) "%" #width PRIuPTR | |
| 1372 | |
| 0 | 1373 |
| 1374 // Enable zap-a-lot if in debug version. | |
| 1375 | |
| 1376 # ifdef ASSERT | |
| 1377 # ifdef COMPILER2 | |
| 1378 # define ENABLE_ZAP_DEAD_LOCALS | |
| 1379 #endif /* COMPILER2 */ | |
| 1380 # endif /* ASSERT */ | |
| 1381 | |
| 1382 #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0])) | |
| 1972 | 1383 |
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1384 // Dereference vptr |
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1385 // All C++ compilers that we know of have the vtbl pointer in the first |
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1386 // word. If there are exceptions, this function needs to be made compiler |
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1387 // specific. |
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1388 static inline void* dereference_vptr(const void* addr) { |
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1389 return *(void**)addr; |
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1390 } |
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1391 |
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1392 #ifndef PRODUCT |
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1393 |
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1394 // For unit testing only |
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1395 class GlobalDefinitions { |
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1396 public: |
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1397 static void test_globals(); |
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1398 }; |
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1399 |
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1400 #endif // PRODUCT |
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cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
7623
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changeset
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1401 |
| 1972 | 1402 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP |