Mercurial > hg > graal-compiler
annotate src/share/vm/utilities/globalDefinitions.hpp @ 14460:8a9bb7821e28
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| author | kvn |
|---|---|
| date | Wed, 19 Feb 2014 12:08:49 -0800 |
| parents | 63a4eb8bcd23 c6d7e7406136 |
| children | d8041d695d19 |
| rev | line source |
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| 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_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 |
| 45 #include "utilities/macros.hpp" | |
| 46 | |
| 0 | 47 // This file holds all globally used constants & types, class (forward) |
| 48 // declarations and a few frequently used utility functions. | |
| 49 | |
| 50 //---------------------------------------------------------------------------------------------------- | |
| 51 // Constants | |
| 52 | |
| 53 const int LogBytesPerShort = 1; | |
| 54 const int LogBytesPerInt = 2; | |
| 55 #ifdef _LP64 | |
| 56 const int LogBytesPerWord = 3; | |
| 57 #else | |
| 58 const int LogBytesPerWord = 2; | |
| 59 #endif | |
| 60 const int LogBytesPerLong = 3; | |
| 61 | |
| 62 const int BytesPerShort = 1 << LogBytesPerShort; | |
| 63 const int BytesPerInt = 1 << LogBytesPerInt; | |
| 64 const int BytesPerWord = 1 << LogBytesPerWord; | |
| 65 const int BytesPerLong = 1 << LogBytesPerLong; | |
| 66 | |
| 67 const int LogBitsPerByte = 3; | |
| 68 const int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort; | |
| 69 const int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt; | |
| 70 const int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord; | |
| 71 const int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong; | |
| 72 | |
| 73 const int BitsPerByte = 1 << LogBitsPerByte; | |
| 74 const int BitsPerShort = 1 << LogBitsPerShort; | |
| 75 const int BitsPerInt = 1 << LogBitsPerInt; | |
| 76 const int BitsPerWord = 1 << LogBitsPerWord; | |
| 77 const int BitsPerLong = 1 << LogBitsPerLong; | |
| 78 | |
| 79 const int WordAlignmentMask = (1 << LogBytesPerWord) - 1; | |
| 80 const int LongAlignmentMask = (1 << LogBytesPerLong) - 1; | |
| 81 | |
| 82 const int WordsPerLong = 2; // Number of stack entries for longs | |
| 83 | |
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84 const int oopSize = sizeof(char*); // Full-width oop |
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85 extern int heapOopSize; // Oop within a java object |
| 0 | 86 const int wordSize = sizeof(char*); |
| 87 const int longSize = sizeof(jlong); | |
| 88 const int jintSize = sizeof(jint); | |
| 89 const int size_tSize = sizeof(size_t); | |
| 90 | |
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91 const int BytesPerOop = BytesPerWord; // Full-width oop |
| 0 | 92 |
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93 extern int LogBytesPerHeapOop; // Oop within a java object |
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94 extern int LogBitsPerHeapOop; |
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95 extern int BytesPerHeapOop; |
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96 extern int BitsPerHeapOop; |
| 0 | 97 |
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98 // Oop encoding heap max |
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99 extern uint64_t OopEncodingHeapMax; |
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100 |
| 0 | 101 const int BitsPerJavaInteger = 32; |
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102 const int BitsPerJavaLong = 64; |
| 0 | 103 const int BitsPerSize_t = size_tSize * BitsPerByte; |
| 104 | |
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105 // Size of a char[] needed to represent a jint as a string in decimal. |
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106 const int jintAsStringSize = 12; |
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107 |
| 0 | 108 // In fact this should be |
| 109 // log2_intptr(sizeof(class JavaThread)) - log2_intptr(64); | |
| 110 // see os::set_memory_serialize_page() | |
| 111 #ifdef _LP64 | |
| 112 const int SerializePageShiftCount = 4; | |
| 113 #else | |
| 114 const int SerializePageShiftCount = 3; | |
| 115 #endif | |
| 116 | |
| 117 // An opaque struct of heap-word width, so that HeapWord* can be a generic | |
| 118 // pointer into the heap. We require that object sizes be measured in | |
| 119 // units of heap words, so that that | |
| 120 // HeapWord* hw; | |
| 121 // hw += oop(hw)->foo(); | |
| 122 // works, where foo is a method (like size or scavenge) that returns the | |
| 123 // object size. | |
| 124 class HeapWord { | |
| 125 friend class VMStructs; | |
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126 private: |
| 0 | 127 char* i; |
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128 #ifndef PRODUCT |
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129 public: |
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130 char* value() { return i; } |
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131 #endif |
| 0 | 132 }; |
| 133 | |
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134 // Analogous opaque struct for metadata allocated from |
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135 // metaspaces. |
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136 class MetaWord { |
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137 friend class VMStructs; |
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138 private: |
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139 char* i; |
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140 }; |
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141 |
| 0 | 142 // HeapWordSize must be 2^LogHeapWordSize. |
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143 const int HeapWordSize = sizeof(HeapWord); |
| 0 | 144 #ifdef _LP64 |
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145 const int LogHeapWordSize = 3; |
| 0 | 146 #else |
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147 const int LogHeapWordSize = 2; |
| 0 | 148 #endif |
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149 const int HeapWordsPerLong = BytesPerLong / HeapWordSize; |
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150 const int LogHeapWordsPerLong = LogBytesPerLong - LogHeapWordSize; |
| 0 | 151 |
| 152 // The larger HeapWordSize for 64bit requires larger heaps | |
| 153 // for the same application running in 64bit. See bug 4967770. | |
| 154 // The minimum alignment to a heap word size is done. Other | |
| 14309 | 155 // parts of the memory system may require additional alignment |
| 0 | 156 // and are responsible for those alignments. |
| 157 #ifdef _LP64 | |
| 158 #define ScaleForWordSize(x) align_size_down_((x) * 13 / 10, HeapWordSize) | |
| 159 #else | |
| 160 #define ScaleForWordSize(x) (x) | |
| 161 #endif | |
| 162 | |
| 163 // The minimum number of native machine words necessary to contain "byte_size" | |
| 164 // bytes. | |
| 165 inline size_t heap_word_size(size_t byte_size) { | |
| 166 return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize; | |
| 167 } | |
| 168 | |
| 169 | |
| 170 const size_t K = 1024; | |
| 171 const size_t M = K*K; | |
| 172 const size_t G = M*K; | |
| 173 const size_t HWperKB = K / sizeof(HeapWord); | |
| 174 | |
| 175 const jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint | |
| 176 const jint max_jint = (juint)min_jint - 1; // 0x7FFFFFFF == largest jint | |
| 177 | |
| 178 // Constants for converting from a base unit to milli-base units. For | |
| 179 // example from seconds to milliseconds and microseconds | |
| 180 | |
| 181 const int MILLIUNITS = 1000; // milli units per base unit | |
| 182 const int MICROUNITS = 1000000; // micro units per base unit | |
| 183 const int NANOUNITS = 1000000000; // nano units per base unit | |
| 184 | |
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185 const jlong NANOSECS_PER_SEC = CONST64(1000000000); |
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186 const jint NANOSECS_PER_MILLISEC = 1000000; |
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187 |
| 0 | 188 inline const char* proper_unit_for_byte_size(size_t s) { |
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189 #ifdef _LP64 |
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190 if (s >= 10*G) { |
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191 return "G"; |
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192 } |
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193 #endif |
| 0 | 194 if (s >= 10*M) { |
| 195 return "M"; | |
| 196 } else if (s >= 10*K) { | |
| 197 return "K"; | |
| 198 } else { | |
| 199 return "B"; | |
| 200 } | |
| 201 } | |
| 202 | |
| 6059 | 203 template <class T> |
| 204 inline T byte_size_in_proper_unit(T s) { | |
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205 #ifdef _LP64 |
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206 if (s >= 10*G) { |
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207 return (T)(s/G); |
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208 } |
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209 #endif |
| 0 | 210 if (s >= 10*M) { |
| 6059 | 211 return (T)(s/M); |
| 0 | 212 } else if (s >= 10*K) { |
| 6059 | 213 return (T)(s/K); |
| 0 | 214 } else { |
| 215 return s; | |
| 216 } | |
| 217 } | |
| 218 | |
| 219 //---------------------------------------------------------------------------------------------------- | |
| 220 // VM type definitions | |
| 221 | |
| 222 // intx and uintx are the 'extended' int and 'extended' unsigned int types; | |
| 223 // they are 32bit wide on a 32-bit platform, and 64bit wide on a 64bit platform. | |
| 224 | |
| 225 typedef intptr_t intx; | |
| 226 typedef uintptr_t uintx; | |
| 227 | |
| 228 const intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1); | |
| 229 const intx max_intx = (uintx)min_intx - 1; | |
| 230 const uintx max_uintx = (uintx)-1; | |
| 231 | |
| 232 // Table of values: | |
| 233 // sizeof intx 4 8 | |
| 234 // min_intx 0x80000000 0x8000000000000000 | |
| 235 // max_intx 0x7FFFFFFF 0x7FFFFFFFFFFFFFFF | |
| 236 // max_uintx 0xFFFFFFFF 0xFFFFFFFFFFFFFFFF | |
| 237 | |
| 238 typedef unsigned int uint; NEEDS_CLEANUP | |
| 239 | |
| 240 | |
| 241 //---------------------------------------------------------------------------------------------------- | |
| 242 // Java type definitions | |
| 243 | |
| 244 // All kinds of 'plain' byte addresses | |
| 245 typedef signed char s_char; | |
| 246 typedef unsigned char u_char; | |
| 247 typedef u_char* address; | |
| 248 typedef uintptr_t address_word; // unsigned integer which will hold a pointer | |
| 249 // except for some implementations of a C++ | |
| 250 // linkage pointer to function. Should never | |
| 251 // need one of those to be placed in this | |
| 252 // type anyway. | |
| 253 | |
| 254 // Utility functions to "portably" (?) bit twiddle pointers | |
| 255 // Where portable means keep ANSI C++ compilers quiet | |
| 256 | |
| 257 inline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); } | |
| 258 inline address clear_address_bits(address x, int m) { return address(intptr_t(x) & ~m); } | |
| 259 | |
| 260 // Utility functions to "portably" make cast to/from function pointers. | |
| 261 | |
| 262 inline address_word mask_address_bits(address x, int m) { return address_word(x) & m; } | |
| 263 inline address_word castable_address(address x) { return address_word(x) ; } | |
| 264 inline address_word castable_address(void* x) { return address_word(x) ; } | |
| 265 | |
| 266 // Pointer subtraction. | |
| 267 // The idea here is to avoid ptrdiff_t, which is signed and so doesn't have | |
| 268 // the range we might need to find differences from one end of the heap | |
| 269 // to the other. | |
| 270 // A typical use might be: | |
| 271 // if (pointer_delta(end(), top()) >= size) { | |
| 272 // // enough room for an object of size | |
| 273 // ... | |
| 274 // and then additions like | |
| 275 // ... top() + size ... | |
| 276 // are safe because we know that top() is at least size below end(). | |
| 277 inline size_t pointer_delta(const void* left, | |
| 278 const void* right, | |
| 279 size_t element_size) { | |
| 280 return (((uintptr_t) left) - ((uintptr_t) right)) / element_size; | |
| 281 } | |
| 282 // A version specialized for HeapWord*'s. | |
| 283 inline size_t pointer_delta(const HeapWord* left, const HeapWord* right) { | |
| 284 return pointer_delta(left, right, sizeof(HeapWord)); | |
| 285 } | |
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286 // A version specialized for MetaWord*'s. |
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287 inline size_t pointer_delta(const MetaWord* left, const MetaWord* right) { |
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288 return pointer_delta(left, right, sizeof(MetaWord)); |
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289 } |
| 0 | 290 |
| 291 // | |
| 292 // ANSI C++ does not allow casting from one pointer type to a function pointer | |
| 293 // directly without at best a warning. This macro accomplishes it silently | |
| 294 // In every case that is present at this point the value be cast is a pointer | |
| 295 // to a C linkage function. In somecase the type used for the cast reflects | |
| 296 // that linkage and a picky compiler would not complain. In other cases because | |
| 297 // there is no convenient place to place a typedef with extern C linkage (i.e | |
| 298 // a platform dependent header file) it doesn't. At this point no compiler seems | |
| 299 // picky enough to catch these instances (which are few). It is possible that | |
| 300 // using templates could fix these for all cases. This use of templates is likely | |
| 301 // so far from the middle of the road that it is likely to be problematic in | |
| 302 // many C++ compilers. | |
| 303 // | |
| 304 #define CAST_TO_FN_PTR(func_type, value) ((func_type)(castable_address(value))) | |
| 305 #define CAST_FROM_FN_PTR(new_type, func_ptr) ((new_type)((address_word)(func_ptr))) | |
| 306 | |
| 307 // Unsigned byte types for os and stream.hpp | |
| 308 | |
| 309 // Unsigned one, two, four and eigth byte quantities used for describing | |
| 310 // the .class file format. See JVM book chapter 4. | |
| 311 | |
| 312 typedef jubyte u1; | |
| 313 typedef jushort u2; | |
| 314 typedef juint u4; | |
| 315 typedef julong u8; | |
| 316 | |
| 317 const jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte | |
| 318 const jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort | |
| 319 const juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint | |
| 320 const julong max_julong = (julong)-1; // 0xFF....FF largest julong | |
| 321 | |
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322 typedef jbyte s1; |
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323 typedef jshort s2; |
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324 typedef jint s4; |
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325 typedef jlong s8; |
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326 |
| 0 | 327 //---------------------------------------------------------------------------------------------------- |
| 328 // JVM spec restrictions | |
| 329 | |
| 330 const int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134) | |
| 331 | |
| 12837 | 332 // Default ProtectionDomainCacheSize values |
| 333 | |
| 334 const int defaultProtectionDomainCacheSize = NOT_LP64(137) LP64_ONLY(2017); | |
| 0 | 335 |
| 336 //---------------------------------------------------------------------------------------------------- | |
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337 // Default and minimum StringTableSize values |
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338 |
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339 const int defaultStringTableSize = NOT_LP64(1009) LP64_ONLY(60013); |
| 12837 | 340 const int minimumStringTableSize = 1009; |
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341 |
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342 const int defaultSymbolTableSize = 20011; |
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343 const int minimumSymbolTableSize = 1009; |
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344 |
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345 |
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346 //---------------------------------------------------------------------------------------------------- |
| 0 | 347 // HotSwap - for JVMTI aka Class File Replacement and PopFrame |
| 348 // | |
| 349 // Determines whether on-the-fly class replacement and frame popping are enabled. | |
| 350 | |
| 351 #define HOTSWAP | |
| 352 | |
| 353 //---------------------------------------------------------------------------------------------------- | |
| 354 // Object alignment, in units of HeapWords. | |
| 355 // | |
| 356 // Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and | |
| 357 // reference fields can be naturally aligned. | |
| 358 | |
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359 extern int MinObjAlignment; |
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360 extern int MinObjAlignmentInBytes; |
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361 extern int MinObjAlignmentInBytesMask; |
| 0 | 362 |
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363 extern int LogMinObjAlignment; |
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364 extern int LogMinObjAlignmentInBytes; |
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365 |
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366 const int LogKlassAlignmentInBytes = 3; |
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367 const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize; |
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368 const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes; |
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369 const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize; |
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370 |
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371 // Klass encoding metaspace max size |
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372 const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes; |
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373 |
| 0 | 374 // Machine dependent stuff |
| 375 | |
| 1972 | 376 #ifdef TARGET_ARCH_x86 |
| 377 # include "globalDefinitions_x86.hpp" | |
| 378 #endif | |
| 379 #ifdef TARGET_ARCH_sparc | |
| 380 # include "globalDefinitions_sparc.hpp" | |
| 381 #endif | |
| 382 #ifdef TARGET_ARCH_zero | |
| 383 # include "globalDefinitions_zero.hpp" | |
| 384 #endif | |
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385 #ifdef TARGET_ARCH_arm |
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386 # include "globalDefinitions_arm.hpp" |
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387 #endif |
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388 #ifdef TARGET_ARCH_ppc |
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389 # include "globalDefinitions_ppc.hpp" |
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390 #endif |
| 1972 | 391 |
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392 /* |
| 11129 | 393 * If a platform does not support native stack walking |
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394 * the platform specific globalDefinitions (above) |
| 11129 | 395 * can set PLATFORM_NATIVE_STACK_WALKING_SUPPORTED to 0 |
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396 */ |
| 11129 | 397 #ifndef PLATFORM_NATIVE_STACK_WALKING_SUPPORTED |
| 398 #define PLATFORM_NATIVE_STACK_WALKING_SUPPORTED 1 | |
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399 #endif |
| 0 | 400 |
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401 // To assure the IRIW property on processors that are not multiple copy |
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402 // atomic, sync instructions must be issued between volatile reads to |
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403 // assure their ordering, instead of after volatile stores. |
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404 // (See "A Tutorial Introduction to the ARM and POWER Relaxed Memory Models" |
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405 // by Luc Maranget, Susmit Sarkar and Peter Sewell, INRIA/Cambridge) |
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406 #ifdef CPU_NOT_MULTIPLE_COPY_ATOMIC |
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407 const bool support_IRIW_for_not_multiple_copy_atomic_cpu = true; |
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408 #else |
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409 const bool support_IRIW_for_not_multiple_copy_atomic_cpu = false; |
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410 #endif |
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411 |
| 0 | 412 // The byte alignment to be used by Arena::Amalloc. See bugid 4169348. |
| 413 // Note: this value must be a power of 2 | |
| 414 | |
| 415 #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord) | |
| 416 | |
| 417 // Signed variants of alignment helpers. There are two versions of each, a macro | |
| 418 // for use in places like enum definitions that require compile-time constant | |
| 419 // expressions and a function for all other places so as to get type checking. | |
| 420 | |
| 421 #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1)) | |
| 422 | |
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423 inline bool is_size_aligned(size_t size, size_t alignment) { |
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424 return align_size_up_(size, alignment) == size; |
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425 } |
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426 |
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427 inline bool is_ptr_aligned(void* ptr, size_t alignment) { |
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428 return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr; |
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429 } |
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430 |
| 0 | 431 inline intptr_t align_size_up(intptr_t size, intptr_t alignment) { |
| 432 return align_size_up_(size, alignment); | |
| 433 } | |
| 434 | |
| 435 #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1)) | |
| 436 | |
| 437 inline intptr_t align_size_down(intptr_t size, intptr_t alignment) { | |
| 438 return align_size_down_(size, alignment); | |
| 439 } | |
| 440 | |
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441 #define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment))) |
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442 |
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443 inline void* align_ptr_up(void* ptr, size_t alignment) { |
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444 return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment); |
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445 } |
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446 |
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447 inline void* align_ptr_down(void* ptr, size_t alignment) { |
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448 return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment); |
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449 } |
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450 |
| 0 | 451 // Align objects by rounding up their size, in HeapWord units. |
| 452 | |
| 453 #define align_object_size_(size) align_size_up_(size, MinObjAlignment) | |
| 454 | |
| 455 inline intptr_t align_object_size(intptr_t size) { | |
| 456 return align_size_up(size, MinObjAlignment); | |
| 457 } | |
| 458 | |
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459 inline bool is_object_aligned(intptr_t addr) { |
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460 return addr == align_object_size(addr); |
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461 } |
| 0 | 462 |
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463 // Pad out certain offsets to jlong alignment, in HeapWord units. |
| 0 | 464 |
| 465 inline intptr_t align_object_offset(intptr_t offset) { | |
| 466 return align_size_up(offset, HeapWordsPerLong); | |
| 467 } | |
| 468 | |
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469 inline void* align_pointer_up(const void* addr, size_t size) { |
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470 return (void*) align_size_up_((uintptr_t)addr, size); |
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471 } |
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472 |
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473 // Align down with a lower bound. If the aligning results in 0, return 'alignment'. |
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474 |
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475 inline size_t align_size_down_bounded(size_t size, size_t alignment) { |
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476 size_t aligned_size = align_size_down_(size, alignment); |
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477 return aligned_size > 0 ? aligned_size : alignment; |
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478 } |
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479 |
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480 // Clamp an address to be within a specific page |
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481 // 1. If addr is on the page it is returned as is |
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482 // 2. If addr is above the page_address the start of the *next* page will be returned |
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483 // 3. Otherwise, if addr is below the page_address the start of the page will be returned |
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484 inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) { |
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485 if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) { |
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486 // address is in the specified page, just return it as is |
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487 return addr; |
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488 } else if (addr > page_address) { |
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489 // address is above specified page, return start of next page |
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490 return (address)align_size_down(intptr_t(page_address), page_size) + page_size; |
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491 } else { |
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492 // address is below specified page, return start of page |
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493 return (address)align_size_down(intptr_t(page_address), page_size); |
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494 } |
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495 } |
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496 |
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497 |
| 1665 | 498 // The expected size in bytes of a cache line, used to pad data structures. |
| 499 #define DEFAULT_CACHE_LINE_SIZE 64 | |
| 500 | |
| 0 | 501 |
| 502 //---------------------------------------------------------------------------------------------------- | |
| 503 // Utility macros for compilers | |
| 504 // used to silence compiler warnings | |
| 505 | |
| 506 #define Unused_Variable(var) var | |
| 507 | |
| 508 | |
| 509 //---------------------------------------------------------------------------------------------------- | |
| 510 // Miscellaneous | |
| 511 | |
| 512 // 6302670 Eliminate Hotspot __fabsf dependency | |
| 513 // All fabs() callers should call this function instead, which will implicitly | |
| 514 // convert the operand to double, avoiding a dependency on __fabsf which | |
| 515 // doesn't exist in early versions of Solaris 8. | |
| 516 inline double fabsd(double value) { | |
| 517 return fabs(value); | |
| 518 } | |
| 519 | |
| 520 inline jint low (jlong value) { return jint(value); } | |
| 521 inline jint high(jlong value) { return jint(value >> 32); } | |
| 522 | |
| 523 // the fancy casts are a hopefully portable way | |
| 524 // to do unsigned 32 to 64 bit type conversion | |
| 525 inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32; | |
| 526 *value |= (jlong)(julong)(juint)low; } | |
| 527 | |
| 528 inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff; | |
| 529 *value |= (jlong)high << 32; } | |
| 530 | |
| 531 inline jlong jlong_from(jint h, jint l) { | |
| 532 jlong result = 0; // initialization to avoid warning | |
| 533 set_high(&result, h); | |
| 534 set_low(&result, l); | |
| 535 return result; | |
| 536 } | |
| 537 | |
| 538 union jlong_accessor { | |
| 539 jint words[2]; | |
| 540 jlong long_value; | |
| 541 }; | |
| 542 | |
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543 void basic_types_init(); // cannot define here; uses assert |
| 0 | 544 |
| 545 | |
| 546 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java | |
| 547 enum BasicType { | |
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548 T_BOOLEAN = 4, |
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549 T_CHAR = 5, |
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550 T_FLOAT = 6, |
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551 T_DOUBLE = 7, |
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552 T_BYTE = 8, |
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553 T_SHORT = 9, |
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554 T_INT = 10, |
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555 T_LONG = 11, |
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556 T_OBJECT = 12, |
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557 T_ARRAY = 13, |
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558 T_VOID = 14, |
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559 T_ADDRESS = 15, |
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560 T_NARROWOOP = 16, |
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561 T_METADATA = 17, |
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562 T_NARROWKLASS = 18, |
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563 T_CONFLICT = 19, // for stack value type with conflicting contents |
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564 T_ILLEGAL = 99 |
| 0 | 565 }; |
| 566 | |
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567 inline bool is_java_primitive(BasicType t) { |
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568 return T_BOOLEAN <= t && t <= T_LONG; |
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569 } |
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570 |
| 710 | 571 inline bool is_subword_type(BasicType t) { |
| 572 // these guys are processed exactly like T_INT in calling sequences: | |
| 573 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT); | |
| 574 } | |
| 575 | |
| 576 inline bool is_signed_subword_type(BasicType t) { | |
| 577 return (t == T_BYTE || t == T_SHORT); | |
| 578 } | |
| 579 | |
| 0 | 580 // Convert a char from a classfile signature to a BasicType |
| 581 inline BasicType char2type(char c) { | |
| 582 switch( c ) { | |
| 583 case 'B': return T_BYTE; | |
| 584 case 'C': return T_CHAR; | |
| 585 case 'D': return T_DOUBLE; | |
| 586 case 'F': return T_FLOAT; | |
| 587 case 'I': return T_INT; | |
| 588 case 'J': return T_LONG; | |
| 589 case 'S': return T_SHORT; | |
| 590 case 'Z': return T_BOOLEAN; | |
| 591 case 'V': return T_VOID; | |
| 592 case 'L': return T_OBJECT; | |
| 593 case '[': return T_ARRAY; | |
| 594 } | |
| 595 return T_ILLEGAL; | |
| 596 } | |
| 597 | |
| 598 extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar | |
| 599 inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; } | |
| 600 extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements | |
| 601 extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar | |
| 602 inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; } | |
| 603 extern BasicType name2type(const char* name); | |
| 604 | |
| 605 // Auxilary math routines | |
| 606 // least common multiple | |
| 607 extern size_t lcm(size_t a, size_t b); | |
| 608 | |
| 609 | |
| 610 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java | |
| 611 enum BasicTypeSize { | |
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612 T_BOOLEAN_size = 1, |
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613 T_CHAR_size = 1, |
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614 T_FLOAT_size = 1, |
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615 T_DOUBLE_size = 2, |
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616 T_BYTE_size = 1, |
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617 T_SHORT_size = 1, |
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618 T_INT_size = 1, |
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619 T_LONG_size = 2, |
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620 T_OBJECT_size = 1, |
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621 T_ARRAY_size = 1, |
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622 T_NARROWOOP_size = 1, |
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623 T_NARROWKLASS_size = 1, |
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624 T_VOID_size = 0 |
| 0 | 625 }; |
| 626 | |
| 627 | |
| 628 // maps a BasicType to its instance field storage type: | |
| 629 // all sub-word integral types are widened to T_INT | |
| 630 extern BasicType type2field[T_CONFLICT+1]; | |
| 631 extern BasicType type2wfield[T_CONFLICT+1]; | |
| 632 | |
| 633 | |
| 634 // size in bytes | |
| 635 enum ArrayElementSize { | |
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636 T_BOOLEAN_aelem_bytes = 1, |
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637 T_CHAR_aelem_bytes = 2, |
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638 T_FLOAT_aelem_bytes = 4, |
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639 T_DOUBLE_aelem_bytes = 8, |
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640 T_BYTE_aelem_bytes = 1, |
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641 T_SHORT_aelem_bytes = 2, |
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642 T_INT_aelem_bytes = 4, |
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643 T_LONG_aelem_bytes = 8, |
| 0 | 644 #ifdef _LP64 |
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645 T_OBJECT_aelem_bytes = 8, |
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646 T_ARRAY_aelem_bytes = 8, |
| 0 | 647 #else |
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648 T_OBJECT_aelem_bytes = 4, |
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649 T_ARRAY_aelem_bytes = 4, |
| 0 | 650 #endif |
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651 T_NARROWOOP_aelem_bytes = 4, |
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652 T_NARROWKLASS_aelem_bytes = 4, |
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653 T_VOID_aelem_bytes = 0 |
| 0 | 654 }; |
| 655 | |
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656 extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element |
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657 #ifdef ASSERT |
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658 extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts |
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659 #else |
| 1763 | 660 inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; } |
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661 #endif |
| 0 | 662 |
| 663 | |
| 664 // JavaValue serves as a container for arbitrary Java values. | |
| 665 | |
| 666 class JavaValue { | |
| 667 | |
| 668 public: | |
| 669 typedef union JavaCallValue { | |
| 670 jfloat f; | |
| 671 jdouble d; | |
| 672 jint i; | |
| 673 jlong l; | |
| 674 jobject h; | |
| 675 } JavaCallValue; | |
| 676 | |
| 677 private: | |
| 678 BasicType _type; | |
| 679 JavaCallValue _value; | |
| 680 | |
| 681 public: | |
| 682 JavaValue(BasicType t = T_ILLEGAL) { _type = t; } | |
| 683 | |
| 684 JavaValue(jfloat value) { | |
| 685 _type = T_FLOAT; | |
| 686 _value.f = value; | |
| 687 } | |
| 688 | |
| 689 JavaValue(jdouble value) { | |
| 690 _type = T_DOUBLE; | |
| 691 _value.d = value; | |
| 692 } | |
| 693 | |
| 694 jfloat get_jfloat() const { return _value.f; } | |
| 695 jdouble get_jdouble() const { return _value.d; } | |
| 696 jint get_jint() const { return _value.i; } | |
| 697 jlong get_jlong() const { return _value.l; } | |
| 698 jobject get_jobject() const { return _value.h; } | |
| 699 JavaCallValue* get_value_addr() { return &_value; } | |
| 700 BasicType get_type() const { return _type; } | |
| 701 | |
| 702 void set_jfloat(jfloat f) { _value.f = f;} | |
| 703 void set_jdouble(jdouble d) { _value.d = d;} | |
| 704 void set_jint(jint i) { _value.i = i;} | |
| 705 void set_jlong(jlong l) { _value.l = l;} | |
| 706 void set_jobject(jobject h) { _value.h = h;} | |
| 707 void set_type(BasicType t) { _type = t; } | |
| 708 | |
| 709 jboolean get_jboolean() const { return (jboolean) (_value.i);} | |
| 710 jbyte get_jbyte() const { return (jbyte) (_value.i);} | |
| 711 jchar get_jchar() const { return (jchar) (_value.i);} | |
| 712 jshort get_jshort() const { return (jshort) (_value.i);} | |
| 713 | |
| 714 }; | |
| 715 | |
| 716 | |
| 717 #define STACK_BIAS 0 | |
| 718 // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff | |
| 719 // in order to extend the reach of the stack pointer. | |
| 720 #if defined(SPARC) && defined(_LP64) | |
| 721 #undef STACK_BIAS | |
| 722 #define STACK_BIAS 0x7ff | |
| 723 #endif | |
| 724 | |
| 725 | |
| 726 // TosState describes the top-of-stack state before and after the execution of | |
| 727 // a bytecode or method. The top-of-stack value may be cached in one or more CPU | |
| 728 // registers. The TosState corresponds to the 'machine represention' of this cached | |
| 729 // value. There's 4 states corresponding to the JAVA types int, long, float & double | |
| 730 // as well as a 5th state in case the top-of-stack value is actually on the top | |
| 731 // of stack (in memory) and thus not cached. The atos state corresponds to the itos | |
| 732 // state when it comes to machine representation but is used separately for (oop) | |
| 733 // type specific operations (e.g. verification code). | |
| 734 | |
| 735 enum TosState { // describes the tos cache contents | |
| 736 btos = 0, // byte, bool tos cached | |
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737 ctos = 1, // char tos cached |
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738 stos = 2, // short tos cached |
| 0 | 739 itos = 3, // int tos cached |
| 740 ltos = 4, // long tos cached | |
| 741 ftos = 5, // float tos cached | |
| 742 dtos = 6, // double tos cached | |
| 743 atos = 7, // object cached | |
| 744 vtos = 8, // tos not cached | |
| 745 number_of_states, | |
| 746 ilgl // illegal state: should not occur | |
| 747 }; | |
| 748 | |
| 749 | |
| 750 inline TosState as_TosState(BasicType type) { | |
| 751 switch (type) { | |
| 752 case T_BYTE : return btos; | |
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753 case T_BOOLEAN: return btos; // FIXME: Add ztos |
| 0 | 754 case T_CHAR : return ctos; |
| 755 case T_SHORT : return stos; | |
| 756 case T_INT : return itos; | |
| 757 case T_LONG : return ltos; | |
| 758 case T_FLOAT : return ftos; | |
| 759 case T_DOUBLE : return dtos; | |
| 760 case T_VOID : return vtos; | |
| 761 case T_ARRAY : // fall through | |
| 762 case T_OBJECT : return atos; | |
| 763 } | |
| 764 return ilgl; | |
| 765 } | |
| 766 | |
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767 inline BasicType as_BasicType(TosState state) { |
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768 switch (state) { |
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769 //case ztos: return T_BOOLEAN;//FIXME |
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770 case btos : return T_BYTE; |
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771 case ctos : return T_CHAR; |
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772 case stos : return T_SHORT; |
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773 case itos : return T_INT; |
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774 case ltos : return T_LONG; |
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775 case ftos : return T_FLOAT; |
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776 case dtos : return T_DOUBLE; |
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777 case atos : return T_OBJECT; |
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778 case vtos : return T_VOID; |
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779 } |
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780 return T_ILLEGAL; |
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781 } |
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782 |
| 0 | 783 |
| 784 // Helper function to convert BasicType info into TosState | |
| 785 // Note: Cannot define here as it uses global constant at the time being. | |
| 786 TosState as_TosState(BasicType type); | |
| 787 | |
| 788 | |
| 789 // JavaThreadState keeps track of which part of the code a thread is executing in. This | |
| 790 // information is needed by the safepoint code. | |
| 791 // | |
| 792 // There are 4 essential states: | |
| 793 // | |
| 794 // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code) | |
| 795 // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles | |
| 796 // _thread_in_vm : Executing in the vm | |
| 797 // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub) | |
| 798 // | |
| 799 // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in | |
| 800 // a transition from one state to another. These extra states makes it possible for the safepoint code to | |
| 801 // handle certain thread_states without having to suspend the thread - making the safepoint code faster. | |
| 802 // | |
| 803 // Given a state, the xxx_trans state can always be found by adding 1. | |
| 804 // | |
| 805 enum JavaThreadState { | |
| 806 _thread_uninitialized = 0, // should never happen (missing initialization) | |
| 807 _thread_new = 2, // just starting up, i.e., in process of being initialized | |
| 808 _thread_new_trans = 3, // corresponding transition state (not used, included for completness) | |
| 809 _thread_in_native = 4, // running in native code | |
| 810 _thread_in_native_trans = 5, // corresponding transition state | |
| 811 _thread_in_vm = 6, // running in VM | |
| 812 _thread_in_vm_trans = 7, // corresponding transition state | |
| 813 _thread_in_Java = 8, // running in Java or in stub code | |
| 814 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness) | |
| 815 _thread_blocked = 10, // blocked in vm | |
| 816 _thread_blocked_trans = 11, // corresponding transition state | |
| 817 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation | |
| 818 }; | |
| 819 | |
| 820 | |
| 821 // Handy constants for deciding which compiler mode to use. | |
| 822 enum MethodCompilation { | |
| 823 InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation | |
| 824 InvalidOSREntryBci = -2 | |
| 825 }; | |
| 826 | |
| 827 // Enumeration to distinguish tiers of compilation | |
| 828 enum CompLevel { | |
| 1783 | 829 CompLevel_any = -1, |
| 830 CompLevel_all = -1, | |
| 831 CompLevel_none = 0, // Interpreter | |
| 832 CompLevel_simple = 1, // C1 | |
| 833 CompLevel_limited_profile = 2, // C1, invocation & backedge counters | |
| 834 CompLevel_full_profile = 3, // C1, invocation & backedge counters + mdo | |
| 2447 | 835 CompLevel_full_optimization = 4, // C2 or Shark |
| 0 | 836 |
| 2447 | 837 #if defined(COMPILER2) || defined(SHARK) |
| 1783 | 838 CompLevel_highest_tier = CompLevel_full_optimization, // pure C2 and tiered |
| 839 #elif defined(COMPILER1) | |
| 840 CompLevel_highest_tier = CompLevel_simple, // pure C1 | |
| 0 | 841 #else |
| 1783 | 842 CompLevel_highest_tier = CompLevel_none, |
| 843 #endif | |
| 844 | |
| 845 #if defined(TIERED) | |
| 846 CompLevel_initial_compile = CompLevel_full_profile // tiered | |
| 847 #elif defined(COMPILER1) | |
| 848 CompLevel_initial_compile = CompLevel_simple // pure C1 | |
| 2447 | 849 #elif defined(COMPILER2) || defined(SHARK) |
| 1783 | 850 CompLevel_initial_compile = CompLevel_full_optimization // pure C2 |
| 851 #else | |
| 852 CompLevel_initial_compile = CompLevel_none | |
| 853 #endif | |
| 0 | 854 }; |
| 855 | |
| 1783 | 856 inline bool is_c1_compile(int comp_level) { |
| 857 return comp_level > CompLevel_none && comp_level < CompLevel_full_optimization; | |
| 0 | 858 } |
| 1783 | 859 |
| 860 inline bool is_c2_compile(int comp_level) { | |
| 0 | 861 return comp_level == CompLevel_full_optimization; |
| 862 } | |
| 1783 | 863 |
| 0 | 864 inline bool is_highest_tier_compile(int comp_level) { |
| 865 return comp_level == CompLevel_highest_tier; | |
| 866 } | |
| 867 | |
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868 inline bool is_compile(int comp_level) { |
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869 return is_c1_compile(comp_level) || is_c2_compile(comp_level); |
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870 } |
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871 |
| 0 | 872 //---------------------------------------------------------------------------------------------------- |
| 873 // 'Forward' declarations of frequently used classes | |
| 874 // (in order to reduce interface dependencies & reduce | |
| 875 // number of unnecessary compilations after changes) | |
| 876 | |
| 877 class symbolTable; | |
| 878 class ClassFileStream; | |
| 879 | |
| 880 class Event; | |
| 881 | |
| 882 class Thread; | |
| 883 class VMThread; | |
| 884 class JavaThread; | |
| 885 class Threads; | |
| 886 | |
| 887 class VM_Operation; | |
| 888 class VMOperationQueue; | |
| 889 | |
| 890 class CodeBlob; | |
| 891 class nmethod; | |
| 892 class OSRAdapter; | |
| 893 class I2CAdapter; | |
| 894 class C2IAdapter; | |
| 895 class CompiledIC; | |
| 896 class relocInfo; | |
| 897 class ScopeDesc; | |
| 898 class PcDesc; | |
| 899 | |
| 900 class Recompiler; | |
| 901 class Recompilee; | |
| 902 class RecompilationPolicy; | |
| 903 class RFrame; | |
| 904 class CompiledRFrame; | |
| 905 class InterpretedRFrame; | |
| 906 | |
| 907 class frame; | |
| 908 | |
| 909 class vframe; | |
| 910 class javaVFrame; | |
| 911 class interpretedVFrame; | |
| 912 class compiledVFrame; | |
| 913 class deoptimizedVFrame; | |
| 914 class externalVFrame; | |
| 915 class entryVFrame; | |
| 916 | |
| 917 class RegisterMap; | |
| 918 | |
| 919 class Mutex; | |
| 920 class Monitor; | |
| 921 class BasicLock; | |
| 922 class BasicObjectLock; | |
| 923 | |
| 924 class PeriodicTask; | |
| 925 | |
| 926 class JavaCallWrapper; | |
| 927 | |
| 928 class oopDesc; | |
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929 class metaDataOopDesc; |
| 0 | 930 |
| 931 class NativeCall; | |
| 932 | |
| 933 class zone; | |
| 934 | |
| 935 class StubQueue; | |
| 936 | |
| 937 class outputStream; | |
| 938 | |
| 939 class ResourceArea; | |
| 940 | |
| 941 class DebugInformationRecorder; | |
| 942 class ScopeValue; | |
| 943 class CompressedStream; | |
| 944 class DebugInfoReadStream; | |
| 945 class DebugInfoWriteStream; | |
| 946 class LocationValue; | |
| 947 class ConstantValue; | |
| 948 class IllegalValue; | |
| 949 | |
| 950 class PrivilegedElement; | |
| 951 class MonitorArray; | |
| 952 | |
| 953 class MonitorInfo; | |
| 954 | |
| 955 class OffsetClosure; | |
| 956 class OopMapCache; | |
| 957 class InterpreterOopMap; | |
| 958 class OopMapCacheEntry; | |
| 959 class OSThread; | |
| 960 | |
| 961 typedef int (*OSThreadStartFunc)(void*); | |
| 962 | |
| 963 class Space; | |
| 964 | |
| 965 class JavaValue; | |
| 966 class methodHandle; | |
| 967 class JavaCallArguments; | |
| 968 | |
| 969 // Basic support for errors (general debug facilities not defined at this point fo the include phase) | |
| 970 | |
| 971 extern void basic_fatal(const char* msg); | |
| 972 | |
| 973 | |
| 974 //---------------------------------------------------------------------------------------------------- | |
| 975 // Special constants for debugging | |
| 976 | |
| 977 const jint badInt = -3; // generic "bad int" value | |
| 978 const long badAddressVal = -2; // generic "bad address" value | |
| 979 const long badOopVal = -1; // generic "bad oop" value | |
| 980 const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC | |
| 981 const int badHandleValue = 0xBC; // value used to zap vm handle area | |
| 982 const int badResourceValue = 0xAB; // value used to zap resource area | |
| 983 const int freeBlockPad = 0xBA; // value used to pad freed blocks. | |
| 984 const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks. | |
| 985 const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area | |
| 986 const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC | |
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987 const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC |
| 0 | 988 const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation |
| 989 const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation | |
| 990 | |
| 991 | |
| 992 // (These must be implemented as #defines because C++ compilers are | |
| 993 // not obligated to inline non-integral constants!) | |
| 994 #define badAddress ((address)::badAddressVal) | |
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995 #define badOop (cast_to_oop(::badOopVal)) |
| 0 | 996 #define badHeapWord (::badHeapWordVal) |
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997 #define badJNIHandle (cast_to_oop(::badJNIHandleVal)) |
| 0 | 998 |
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999 // Default TaskQueue size is 16K (32-bit) or 128K (64-bit) |
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1000 #define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17)) |
| 0 | 1001 |
| 1002 //---------------------------------------------------------------------------------------------------- | |
| 1003 // Utility functions for bitfield manipulations | |
| 1004 | |
| 1005 const intptr_t AllBits = ~0; // all bits set in a word | |
| 1006 const intptr_t NoBits = 0; // no bits set in a word | |
| 1007 const jlong NoLongBits = 0; // no bits set in a long | |
| 1008 const intptr_t OneBit = 1; // only right_most bit set in a word | |
| 1009 | |
| 1010 // get a word with the n.th or the right-most or left-most n bits set | |
| 1011 // (note: #define used only so that they can be used in enum constant definitions) | |
| 1012 #define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n)) | |
| 1013 #define right_n_bits(n) (nth_bit(n) - 1) | |
| 1014 #define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n))) | |
| 1015 | |
| 1016 // bit-operations using a mask m | |
| 1017 inline void set_bits (intptr_t& x, intptr_t m) { x |= m; } | |
| 1018 inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; } | |
| 1019 inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; } | |
| 1020 inline jlong mask_long_bits (jlong x, jlong m) { return x & m; } | |
| 1021 inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; } | |
| 1022 | |
| 1023 // bit-operations using the n.th bit | |
| 1024 inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); } | |
| 1025 inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); } | |
| 1026 inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; } | |
| 1027 | |
| 1028 // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!) | |
| 1029 inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) { | |
| 1030 return mask_bits(x >> start_bit_no, right_n_bits(field_length)); | |
| 1031 } | |
| 1032 | |
| 1033 | |
| 1034 //---------------------------------------------------------------------------------------------------- | |
| 1035 // Utility functions for integers | |
| 1036 | |
| 1037 // Avoid use of global min/max macros which may cause unwanted double | |
| 1038 // evaluation of arguments. | |
| 1039 #ifdef max | |
| 1040 #undef max | |
| 1041 #endif | |
| 1042 | |
| 1043 #ifdef min | |
| 1044 #undef min | |
| 1045 #endif | |
| 1046 | |
| 1047 #define max(a,b) Do_not_use_max_use_MAX2_instead | |
| 1048 #define min(a,b) Do_not_use_min_use_MIN2_instead | |
| 1049 | |
| 1050 // It is necessary to use templates here. Having normal overloaded | |
| 1051 // functions does not work because it is necessary to provide both 32- | |
| 1052 // and 64-bit overloaded functions, which does not work, and having | |
| 1053 // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L) | |
| 1054 // will be even more error-prone than macros. | |
| 1055 template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; } | |
| 1056 template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; } | |
| 1057 template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); } | |
| 1058 template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); } | |
| 1059 template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); } | |
| 1060 template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); } | |
| 1061 | |
| 1062 template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; } | |
| 1063 | |
| 1064 // true if x is a power of 2, false otherwise | |
| 1065 inline bool is_power_of_2(intptr_t x) { | |
| 1066 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits)); | |
| 1067 } | |
| 1068 | |
| 1069 // long version of is_power_of_2 | |
| 1070 inline bool is_power_of_2_long(jlong x) { | |
| 1071 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits)); | |
| 1072 } | |
| 1073 | |
| 1074 //* largest i such that 2^i <= x | |
| 1075 // A negative value of 'x' will return '31' | |
| 1076 inline int log2_intptr(intptr_t x) { | |
| 1077 int i = -1; | |
| 1078 uintptr_t p = 1; | |
| 1079 while (p != 0 && p <= (uintptr_t)x) { | |
| 1080 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) | |
| 1081 i++; p *= 2; | |
| 1082 } | |
| 1083 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) | |
| 605 | 1084 // (if p = 0 then overflow occurred and i = 31) |
| 0 | 1085 return i; |
| 1086 } | |
| 1087 | |
| 1088 //* largest i such that 2^i <= x | |
| 1089 // A negative value of 'x' will return '63' | |
| 1090 inline int log2_long(jlong x) { | |
| 1091 int i = -1; | |
| 1092 julong p = 1; | |
| 1093 while (p != 0 && p <= (julong)x) { | |
| 1094 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) | |
| 1095 i++; p *= 2; | |
| 1096 } | |
| 1097 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) | |
| 605 | 1098 // (if p = 0 then overflow occurred and i = 63) |
| 0 | 1099 return i; |
| 1100 } | |
| 1101 | |
| 1102 //* the argument must be exactly a power of 2 | |
| 1103 inline int exact_log2(intptr_t x) { | |
| 1104 #ifdef ASSERT | |
| 1105 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2"); | |
| 1106 #endif | |
| 1107 return log2_intptr(x); | |
| 1108 } | |
| 1109 | |
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1110 //* the argument must be exactly a power of 2 |
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1111 inline int exact_log2_long(jlong x) { |
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1112 #ifdef ASSERT |
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1113 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2"); |
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1114 #endif |
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1115 return log2_long(x); |
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1116 } |
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1117 |
| 0 | 1118 |
| 1119 // returns integer round-up to the nearest multiple of s (s must be a power of two) | |
| 1120 inline intptr_t round_to(intptr_t x, uintx s) { | |
| 1121 #ifdef ASSERT | |
| 1122 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); | |
| 1123 #endif | |
| 1124 const uintx m = s - 1; | |
| 1125 return mask_bits(x + m, ~m); | |
| 1126 } | |
| 1127 | |
| 1128 // returns integer round-down to the nearest multiple of s (s must be a power of two) | |
| 1129 inline intptr_t round_down(intptr_t x, uintx s) { | |
| 1130 #ifdef ASSERT | |
| 1131 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); | |
| 1132 #endif | |
| 1133 const uintx m = s - 1; | |
| 1134 return mask_bits(x, ~m); | |
| 1135 } | |
| 1136 | |
| 1137 | |
| 1138 inline bool is_odd (intx x) { return x & 1; } | |
| 1139 inline bool is_even(intx x) { return !is_odd(x); } | |
| 1140 | |
| 1141 // "to" should be greater than "from." | |
| 1142 inline intx byte_size(void* from, void* to) { | |
| 1143 return (address)to - (address)from; | |
| 1144 } | |
| 1145 | |
| 1146 //---------------------------------------------------------------------------------------------------- | |
| 1147 // Avoid non-portable casts with these routines (DEPRECATED) | |
| 1148 | |
| 1149 // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE | |
| 1150 // Bytes is optimized machine-specifically and may be much faster then the portable routines below. | |
| 1151 | |
| 1152 // Given sequence of four bytes, build into a 32-bit word | |
| 1153 // following the conventions used in class files. | |
| 1154 // On the 386, this could be realized with a simple address cast. | |
| 1155 // | |
| 1156 | |
| 1157 // This routine takes eight bytes: | |
| 1158 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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1159 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 )) |
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1160 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 )) |
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1161 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 )) |
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1162 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 )) |
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1163 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 )) |
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1164 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 )) |
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1165 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 )) |
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1166 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 )); |
| 0 | 1167 } |
| 1168 | |
| 1169 // This routine takes four bytes: | |
| 1170 inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { | |
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1171 return (( u4(c1) << 24 ) & 0xff000000) |
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1172 | (( u4(c2) << 16 ) & 0x00ff0000) |
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1173 | (( u4(c3) << 8 ) & 0x0000ff00) |
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1174 | (( u4(c4) << 0 ) & 0x000000ff); |
| 0 | 1175 } |
| 1176 | |
| 1177 // And this one works if the four bytes are contiguous in memory: | |
| 1178 inline u4 build_u4_from( u1* p ) { | |
| 1179 return build_u4_from( p[0], p[1], p[2], p[3] ); | |
| 1180 } | |
| 1181 | |
| 1182 // Ditto for two-byte ints: | |
| 1183 inline u2 build_u2_from( u1 c1, u1 c2 ) { | |
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1184 return u2((( u2(c1) << 8 ) & 0xff00) |
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1185 | (( u2(c2) << 0 ) & 0x00ff)); |
| 0 | 1186 } |
| 1187 | |
| 1188 // And this one works if the two bytes are contiguous in memory: | |
| 1189 inline u2 build_u2_from( u1* p ) { | |
| 1190 return build_u2_from( p[0], p[1] ); | |
| 1191 } | |
| 1192 | |
| 1193 // Ditto for floats: | |
| 1194 inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { | |
| 1195 u4 u = build_u4_from( c1, c2, c3, c4 ); | |
| 1196 return *(jfloat*)&u; | |
| 1197 } | |
| 1198 | |
| 1199 inline jfloat build_float_from( u1* p ) { | |
| 1200 u4 u = build_u4_from( p ); | |
| 1201 return *(jfloat*)&u; | |
| 1202 } | |
| 1203 | |
| 1204 | |
| 1205 // now (64-bit) longs | |
| 1206 | |
| 1207 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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1208 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 )) |
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1209 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 )) |
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1210 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 )) |
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1211 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 )) |
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1212 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 )) |
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1213 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 )) |
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1214 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 )) |
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1215 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 )); |
| 0 | 1216 } |
| 1217 | |
| 1218 inline jlong build_long_from( u1* p ) { | |
| 1219 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] ); | |
| 1220 } | |
| 1221 | |
| 1222 | |
| 1223 // Doubles, too! | |
| 1224 inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { | |
| 1225 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 ); | |
| 1226 return *(jdouble*)&u; | |
| 1227 } | |
| 1228 | |
| 1229 inline jdouble build_double_from( u1* p ) { | |
| 1230 jlong u = build_long_from( p ); | |
| 1231 return *(jdouble*)&u; | |
| 1232 } | |
| 1233 | |
| 1234 | |
| 1235 // Portable routines to go the other way: | |
| 1236 | |
| 1237 inline void explode_short_to( u2 x, u1& c1, u1& c2 ) { | |
| 1238 c1 = u1(x >> 8); | |
| 1239 c2 = u1(x); | |
| 1240 } | |
| 1241 | |
| 1242 inline void explode_short_to( u2 x, u1* p ) { | |
| 1243 explode_short_to( x, p[0], p[1]); | |
| 1244 } | |
| 1245 | |
| 1246 inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) { | |
| 1247 c1 = u1(x >> 24); | |
| 1248 c2 = u1(x >> 16); | |
| 1249 c3 = u1(x >> 8); | |
| 1250 c4 = u1(x); | |
| 1251 } | |
| 1252 | |
| 1253 inline void explode_int_to( u4 x, u1* p ) { | |
| 1254 explode_int_to( x, p[0], p[1], p[2], p[3]); | |
| 1255 } | |
| 1256 | |
| 1257 | |
| 1258 // Pack and extract shorts to/from ints: | |
| 1259 | |
| 1260 inline int extract_low_short_from_int(jint x) { | |
| 1261 return x & 0xffff; | |
| 1262 } | |
| 1263 | |
| 1264 inline int extract_high_short_from_int(jint x) { | |
| 1265 return (x >> 16) & 0xffff; | |
| 1266 } | |
| 1267 | |
| 1268 inline int build_int_from_shorts( jushort low, jushort high ) { | |
| 1269 return ((int)((unsigned int)high << 16) | (unsigned int)low); | |
| 1270 } | |
| 1271 | |
| 1272 // Printf-style formatters for fixed- and variable-width types as pointers and | |
| 3960 | 1273 // integers. These are derived from the definitions in inttypes.h. If the platform |
| 1274 // doesn't provide appropriate definitions, they should be provided in | |
| 1275 // the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp) | |
| 0 | 1276 |
| 2361 | 1277 #define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false") |
| 2152 | 1278 |
| 0 | 1279 // Format 32-bit quantities. |
| 3960 | 1280 #define INT32_FORMAT "%" PRId32 |
| 1281 #define UINT32_FORMAT "%" PRIu32 | |
| 1282 #define INT32_FORMAT_W(width) "%" #width PRId32 | |
| 1283 #define UINT32_FORMAT_W(width) "%" #width PRIu32 | |
| 0 | 1284 |
| 3960 | 1285 #define PTR32_FORMAT "0x%08" PRIx32 |
| 0 | 1286 |
| 1287 // Format 64-bit quantities. | |
| 3960 | 1288 #define INT64_FORMAT "%" PRId64 |
| 1289 #define UINT64_FORMAT "%" PRIu64 | |
| 1290 #define INT64_FORMAT_W(width) "%" #width PRId64 | |
| 1291 #define UINT64_FORMAT_W(width) "%" #width PRIu64 | |
| 0 | 1292 |
| 3960 | 1293 #define PTR64_FORMAT "0x%016" PRIx64 |
| 0 | 1294 |
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1295 // Format jlong, if necessary |
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1296 #ifndef JLONG_FORMAT |
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1297 #define JLONG_FORMAT INT64_FORMAT |
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1298 #endif |
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1299 #ifndef JULONG_FORMAT |
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1300 #define JULONG_FORMAT UINT64_FORMAT |
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1301 #endif |
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1302 |
| 3960 | 1303 // Format pointers which change size between 32- and 64-bit. |
| 0 | 1304 #ifdef _LP64 |
| 3960 | 1305 #define INTPTR_FORMAT "0x%016" PRIxPTR |
| 1306 #define PTR_FORMAT "0x%016" PRIxPTR | |
| 0 | 1307 #else // !_LP64 |
| 3960 | 1308 #define INTPTR_FORMAT "0x%08" PRIxPTR |
| 1309 #define PTR_FORMAT "0x%08" PRIxPTR | |
| 0 | 1310 #endif // _LP64 |
| 1311 | |
| 3960 | 1312 #define SSIZE_FORMAT "%" PRIdPTR |
| 1313 #define SIZE_FORMAT "%" PRIuPTR | |
| 1314 #define SSIZE_FORMAT_W(width) "%" #width PRIdPTR | |
| 1315 #define SIZE_FORMAT_W(width) "%" #width PRIuPTR | |
| 1316 | |
| 1317 #define INTX_FORMAT "%" PRIdPTR | |
| 1318 #define UINTX_FORMAT "%" PRIuPTR | |
| 1319 #define INTX_FORMAT_W(width) "%" #width PRIdPTR | |
| 1320 #define UINTX_FORMAT_W(width) "%" #width PRIuPTR | |
| 1321 | |
| 0 | 1322 |
| 1323 // Enable zap-a-lot if in debug version. | |
| 1324 | |
| 1325 # ifdef ASSERT | |
| 1326 # ifdef COMPILER2 | |
| 1327 # define ENABLE_ZAP_DEAD_LOCALS | |
| 1328 #endif /* COMPILER2 */ | |
| 1329 # endif /* ASSERT */ | |
| 1330 | |
| 1331 #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0])) | |
| 1972 | 1332 |
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1333 // Dereference vptr |
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1334 // All C++ compilers that we know of have the vtbl pointer in the first |
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1335 // word. If there are exceptions, this function needs to be made compiler |
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1336 // specific. |
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1337 static inline void* dereference_vptr(void* addr) { |
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1338 return *(void**)addr; |
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1339 } |
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1340 |
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1341 |
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1342 #ifndef PRODUCT |
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1343 |
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1344 // For unit testing only |
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1345 class GlobalDefinitions { |
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1346 public: |
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1347 static void test_globals(); |
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1348 }; |
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1349 |
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1350 #endif // PRODUCT |
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1351 |
| 1972 | 1352 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP |