Fri, 27 Feb 2009 13:27:09 -0800
6810672: Comment typos
Summary: I have collected some typos I have found while looking at the code.
Reviewed-by: kvn, never
duke@435 | 1 | /* |
twisti@994 | 2 | * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | // This file holds all globally used constants & types, class (forward) |
duke@435 | 26 | // declarations and a few frequently used utility functions. |
duke@435 | 27 | |
duke@435 | 28 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 29 | // Constants |
duke@435 | 30 | |
duke@435 | 31 | const int LogBytesPerShort = 1; |
duke@435 | 32 | const int LogBytesPerInt = 2; |
duke@435 | 33 | #ifdef _LP64 |
duke@435 | 34 | const int LogBytesPerWord = 3; |
duke@435 | 35 | #else |
duke@435 | 36 | const int LogBytesPerWord = 2; |
duke@435 | 37 | #endif |
duke@435 | 38 | const int LogBytesPerLong = 3; |
duke@435 | 39 | |
duke@435 | 40 | const int BytesPerShort = 1 << LogBytesPerShort; |
duke@435 | 41 | const int BytesPerInt = 1 << LogBytesPerInt; |
duke@435 | 42 | const int BytesPerWord = 1 << LogBytesPerWord; |
duke@435 | 43 | const int BytesPerLong = 1 << LogBytesPerLong; |
duke@435 | 44 | |
duke@435 | 45 | const int LogBitsPerByte = 3; |
duke@435 | 46 | const int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort; |
duke@435 | 47 | const int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt; |
duke@435 | 48 | const int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord; |
duke@435 | 49 | const int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong; |
duke@435 | 50 | |
duke@435 | 51 | const int BitsPerByte = 1 << LogBitsPerByte; |
duke@435 | 52 | const int BitsPerShort = 1 << LogBitsPerShort; |
duke@435 | 53 | const int BitsPerInt = 1 << LogBitsPerInt; |
duke@435 | 54 | const int BitsPerWord = 1 << LogBitsPerWord; |
duke@435 | 55 | const int BitsPerLong = 1 << LogBitsPerLong; |
duke@435 | 56 | |
duke@435 | 57 | const int WordAlignmentMask = (1 << LogBytesPerWord) - 1; |
duke@435 | 58 | const int LongAlignmentMask = (1 << LogBytesPerLong) - 1; |
duke@435 | 59 | |
duke@435 | 60 | const int WordsPerLong = 2; // Number of stack entries for longs |
duke@435 | 61 | |
coleenp@548 | 62 | const int oopSize = sizeof(char*); // Full-width oop |
coleenp@548 | 63 | extern int heapOopSize; // Oop within a java object |
duke@435 | 64 | const int wordSize = sizeof(char*); |
duke@435 | 65 | const int longSize = sizeof(jlong); |
duke@435 | 66 | const int jintSize = sizeof(jint); |
duke@435 | 67 | const int size_tSize = sizeof(size_t); |
duke@435 | 68 | |
coleenp@548 | 69 | const int BytesPerOop = BytesPerWord; // Full-width oop |
duke@435 | 70 | |
coleenp@548 | 71 | extern int LogBytesPerHeapOop; // Oop within a java object |
coleenp@548 | 72 | extern int LogBitsPerHeapOop; |
coleenp@548 | 73 | extern int BytesPerHeapOop; |
coleenp@548 | 74 | extern int BitsPerHeapOop; |
duke@435 | 75 | |
duke@435 | 76 | const int BitsPerJavaInteger = 32; |
twisti@994 | 77 | const int BitsPerJavaLong = 64; |
duke@435 | 78 | const int BitsPerSize_t = size_tSize * BitsPerByte; |
duke@435 | 79 | |
coleenp@548 | 80 | // Size of a char[] needed to represent a jint as a string in decimal. |
coleenp@548 | 81 | const int jintAsStringSize = 12; |
coleenp@548 | 82 | |
duke@435 | 83 | // In fact this should be |
duke@435 | 84 | // log2_intptr(sizeof(class JavaThread)) - log2_intptr(64); |
duke@435 | 85 | // see os::set_memory_serialize_page() |
duke@435 | 86 | #ifdef _LP64 |
duke@435 | 87 | const int SerializePageShiftCount = 4; |
duke@435 | 88 | #else |
duke@435 | 89 | const int SerializePageShiftCount = 3; |
duke@435 | 90 | #endif |
duke@435 | 91 | |
duke@435 | 92 | // An opaque struct of heap-word width, so that HeapWord* can be a generic |
duke@435 | 93 | // pointer into the heap. We require that object sizes be measured in |
duke@435 | 94 | // units of heap words, so that that |
duke@435 | 95 | // HeapWord* hw; |
duke@435 | 96 | // hw += oop(hw)->foo(); |
duke@435 | 97 | // works, where foo is a method (like size or scavenge) that returns the |
duke@435 | 98 | // object size. |
duke@435 | 99 | class HeapWord { |
duke@435 | 100 | friend class VMStructs; |
jmasa@698 | 101 | private: |
duke@435 | 102 | char* i; |
jmasa@796 | 103 | #ifndef PRODUCT |
jmasa@698 | 104 | public: |
jmasa@698 | 105 | char* value() { return i; } |
jmasa@698 | 106 | #endif |
duke@435 | 107 | }; |
duke@435 | 108 | |
duke@435 | 109 | // HeapWordSize must be 2^LogHeapWordSize. |
coleenp@548 | 110 | const int HeapWordSize = sizeof(HeapWord); |
duke@435 | 111 | #ifdef _LP64 |
coleenp@548 | 112 | const int LogHeapWordSize = 3; |
duke@435 | 113 | #else |
coleenp@548 | 114 | const int LogHeapWordSize = 2; |
duke@435 | 115 | #endif |
coleenp@548 | 116 | const int HeapWordsPerLong = BytesPerLong / HeapWordSize; |
coleenp@548 | 117 | const int LogHeapWordsPerLong = LogBytesPerLong - LogHeapWordSize; |
duke@435 | 118 | |
duke@435 | 119 | // The larger HeapWordSize for 64bit requires larger heaps |
duke@435 | 120 | // for the same application running in 64bit. See bug 4967770. |
duke@435 | 121 | // The minimum alignment to a heap word size is done. Other |
duke@435 | 122 | // parts of the memory system may required additional alignment |
duke@435 | 123 | // and are responsible for those alignments. |
duke@435 | 124 | #ifdef _LP64 |
duke@435 | 125 | #define ScaleForWordSize(x) align_size_down_((x) * 13 / 10, HeapWordSize) |
duke@435 | 126 | #else |
duke@435 | 127 | #define ScaleForWordSize(x) (x) |
duke@435 | 128 | #endif |
duke@435 | 129 | |
duke@435 | 130 | // The minimum number of native machine words necessary to contain "byte_size" |
duke@435 | 131 | // bytes. |
duke@435 | 132 | inline size_t heap_word_size(size_t byte_size) { |
duke@435 | 133 | return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize; |
duke@435 | 134 | } |
duke@435 | 135 | |
duke@435 | 136 | |
duke@435 | 137 | const size_t K = 1024; |
duke@435 | 138 | const size_t M = K*K; |
duke@435 | 139 | const size_t G = M*K; |
duke@435 | 140 | const size_t HWperKB = K / sizeof(HeapWord); |
duke@435 | 141 | |
duke@435 | 142 | const jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint |
duke@435 | 143 | const jint max_jint = (juint)min_jint - 1; // 0x7FFFFFFF == largest jint |
duke@435 | 144 | |
duke@435 | 145 | // Constants for converting from a base unit to milli-base units. For |
duke@435 | 146 | // example from seconds to milliseconds and microseconds |
duke@435 | 147 | |
duke@435 | 148 | const int MILLIUNITS = 1000; // milli units per base unit |
duke@435 | 149 | const int MICROUNITS = 1000000; // micro units per base unit |
duke@435 | 150 | const int NANOUNITS = 1000000000; // nano units per base unit |
duke@435 | 151 | |
duke@435 | 152 | inline const char* proper_unit_for_byte_size(size_t s) { |
duke@435 | 153 | if (s >= 10*M) { |
duke@435 | 154 | return "M"; |
duke@435 | 155 | } else if (s >= 10*K) { |
duke@435 | 156 | return "K"; |
duke@435 | 157 | } else { |
duke@435 | 158 | return "B"; |
duke@435 | 159 | } |
duke@435 | 160 | } |
duke@435 | 161 | |
duke@435 | 162 | inline size_t byte_size_in_proper_unit(size_t s) { |
duke@435 | 163 | if (s >= 10*M) { |
duke@435 | 164 | return s/M; |
duke@435 | 165 | } else if (s >= 10*K) { |
duke@435 | 166 | return s/K; |
duke@435 | 167 | } else { |
duke@435 | 168 | return s; |
duke@435 | 169 | } |
duke@435 | 170 | } |
duke@435 | 171 | |
duke@435 | 172 | |
duke@435 | 173 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 174 | // VM type definitions |
duke@435 | 175 | |
duke@435 | 176 | // intx and uintx are the 'extended' int and 'extended' unsigned int types; |
duke@435 | 177 | // they are 32bit wide on a 32-bit platform, and 64bit wide on a 64bit platform. |
duke@435 | 178 | |
duke@435 | 179 | typedef intptr_t intx; |
duke@435 | 180 | typedef uintptr_t uintx; |
duke@435 | 181 | |
duke@435 | 182 | const intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1); |
duke@435 | 183 | const intx max_intx = (uintx)min_intx - 1; |
duke@435 | 184 | const uintx max_uintx = (uintx)-1; |
duke@435 | 185 | |
duke@435 | 186 | // Table of values: |
duke@435 | 187 | // sizeof intx 4 8 |
duke@435 | 188 | // min_intx 0x80000000 0x8000000000000000 |
duke@435 | 189 | // max_intx 0x7FFFFFFF 0x7FFFFFFFFFFFFFFF |
duke@435 | 190 | // max_uintx 0xFFFFFFFF 0xFFFFFFFFFFFFFFFF |
duke@435 | 191 | |
duke@435 | 192 | typedef unsigned int uint; NEEDS_CLEANUP |
duke@435 | 193 | |
duke@435 | 194 | |
duke@435 | 195 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 196 | // Java type definitions |
duke@435 | 197 | |
duke@435 | 198 | // All kinds of 'plain' byte addresses |
duke@435 | 199 | typedef signed char s_char; |
duke@435 | 200 | typedef unsigned char u_char; |
duke@435 | 201 | typedef u_char* address; |
duke@435 | 202 | typedef uintptr_t address_word; // unsigned integer which will hold a pointer |
duke@435 | 203 | // except for some implementations of a C++ |
duke@435 | 204 | // linkage pointer to function. Should never |
duke@435 | 205 | // need one of those to be placed in this |
duke@435 | 206 | // type anyway. |
duke@435 | 207 | |
duke@435 | 208 | // Utility functions to "portably" (?) bit twiddle pointers |
duke@435 | 209 | // Where portable means keep ANSI C++ compilers quiet |
duke@435 | 210 | |
duke@435 | 211 | inline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); } |
duke@435 | 212 | inline address clear_address_bits(address x, int m) { return address(intptr_t(x) & ~m); } |
duke@435 | 213 | |
duke@435 | 214 | // Utility functions to "portably" make cast to/from function pointers. |
duke@435 | 215 | |
duke@435 | 216 | inline address_word mask_address_bits(address x, int m) { return address_word(x) & m; } |
duke@435 | 217 | inline address_word castable_address(address x) { return address_word(x) ; } |
duke@435 | 218 | inline address_word castable_address(void* x) { return address_word(x) ; } |
duke@435 | 219 | |
duke@435 | 220 | // Pointer subtraction. |
duke@435 | 221 | // The idea here is to avoid ptrdiff_t, which is signed and so doesn't have |
duke@435 | 222 | // the range we might need to find differences from one end of the heap |
duke@435 | 223 | // to the other. |
duke@435 | 224 | // A typical use might be: |
duke@435 | 225 | // if (pointer_delta(end(), top()) >= size) { |
duke@435 | 226 | // // enough room for an object of size |
duke@435 | 227 | // ... |
duke@435 | 228 | // and then additions like |
duke@435 | 229 | // ... top() + size ... |
duke@435 | 230 | // are safe because we know that top() is at least size below end(). |
duke@435 | 231 | inline size_t pointer_delta(const void* left, |
duke@435 | 232 | const void* right, |
duke@435 | 233 | size_t element_size) { |
duke@435 | 234 | return (((uintptr_t) left) - ((uintptr_t) right)) / element_size; |
duke@435 | 235 | } |
duke@435 | 236 | // A version specialized for HeapWord*'s. |
duke@435 | 237 | inline size_t pointer_delta(const HeapWord* left, const HeapWord* right) { |
duke@435 | 238 | return pointer_delta(left, right, sizeof(HeapWord)); |
duke@435 | 239 | } |
duke@435 | 240 | |
duke@435 | 241 | // |
duke@435 | 242 | // ANSI C++ does not allow casting from one pointer type to a function pointer |
duke@435 | 243 | // directly without at best a warning. This macro accomplishes it silently |
duke@435 | 244 | // In every case that is present at this point the value be cast is a pointer |
duke@435 | 245 | // to a C linkage function. In somecase the type used for the cast reflects |
duke@435 | 246 | // that linkage and a picky compiler would not complain. In other cases because |
duke@435 | 247 | // there is no convenient place to place a typedef with extern C linkage (i.e |
duke@435 | 248 | // a platform dependent header file) it doesn't. At this point no compiler seems |
duke@435 | 249 | // picky enough to catch these instances (which are few). It is possible that |
duke@435 | 250 | // using templates could fix these for all cases. This use of templates is likely |
duke@435 | 251 | // so far from the middle of the road that it is likely to be problematic in |
duke@435 | 252 | // many C++ compilers. |
duke@435 | 253 | // |
duke@435 | 254 | #define CAST_TO_FN_PTR(func_type, value) ((func_type)(castable_address(value))) |
duke@435 | 255 | #define CAST_FROM_FN_PTR(new_type, func_ptr) ((new_type)((address_word)(func_ptr))) |
duke@435 | 256 | |
duke@435 | 257 | // Unsigned byte types for os and stream.hpp |
duke@435 | 258 | |
duke@435 | 259 | // Unsigned one, two, four and eigth byte quantities used for describing |
duke@435 | 260 | // the .class file format. See JVM book chapter 4. |
duke@435 | 261 | |
duke@435 | 262 | typedef jubyte u1; |
duke@435 | 263 | typedef jushort u2; |
duke@435 | 264 | typedef juint u4; |
duke@435 | 265 | typedef julong u8; |
duke@435 | 266 | |
duke@435 | 267 | const jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte |
duke@435 | 268 | const jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort |
duke@435 | 269 | const juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint |
duke@435 | 270 | const julong max_julong = (julong)-1; // 0xFF....FF largest julong |
duke@435 | 271 | |
duke@435 | 272 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 273 | // JVM spec restrictions |
duke@435 | 274 | |
duke@435 | 275 | const int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134) |
duke@435 | 276 | |
duke@435 | 277 | |
duke@435 | 278 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 279 | // HotSwap - for JVMTI aka Class File Replacement and PopFrame |
duke@435 | 280 | // |
duke@435 | 281 | // Determines whether on-the-fly class replacement and frame popping are enabled. |
duke@435 | 282 | |
duke@435 | 283 | #define HOTSWAP |
duke@435 | 284 | |
duke@435 | 285 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 286 | // Object alignment, in units of HeapWords. |
duke@435 | 287 | // |
duke@435 | 288 | // Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and |
duke@435 | 289 | // reference fields can be naturally aligned. |
duke@435 | 290 | |
duke@435 | 291 | const int MinObjAlignment = HeapWordsPerLong; |
duke@435 | 292 | const int MinObjAlignmentInBytes = MinObjAlignment * HeapWordSize; |
duke@435 | 293 | const int MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; |
duke@435 | 294 | |
coleenp@548 | 295 | const int LogMinObjAlignment = LogHeapWordsPerLong; |
coleenp@548 | 296 | const int LogMinObjAlignmentInBytes = LogMinObjAlignment + LogHeapWordSize; |
coleenp@548 | 297 | |
duke@435 | 298 | // Machine dependent stuff |
duke@435 | 299 | |
duke@435 | 300 | #include "incls/_globalDefinitions_pd.hpp.incl" |
duke@435 | 301 | |
duke@435 | 302 | // The byte alignment to be used by Arena::Amalloc. See bugid 4169348. |
duke@435 | 303 | // Note: this value must be a power of 2 |
duke@435 | 304 | |
duke@435 | 305 | #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord) |
duke@435 | 306 | |
duke@435 | 307 | // Signed variants of alignment helpers. There are two versions of each, a macro |
duke@435 | 308 | // for use in places like enum definitions that require compile-time constant |
duke@435 | 309 | // expressions and a function for all other places so as to get type checking. |
duke@435 | 310 | |
duke@435 | 311 | #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1)) |
duke@435 | 312 | |
duke@435 | 313 | inline intptr_t align_size_up(intptr_t size, intptr_t alignment) { |
duke@435 | 314 | return align_size_up_(size, alignment); |
duke@435 | 315 | } |
duke@435 | 316 | |
duke@435 | 317 | #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1)) |
duke@435 | 318 | |
duke@435 | 319 | inline intptr_t align_size_down(intptr_t size, intptr_t alignment) { |
duke@435 | 320 | return align_size_down_(size, alignment); |
duke@435 | 321 | } |
duke@435 | 322 | |
duke@435 | 323 | // Align objects by rounding up their size, in HeapWord units. |
duke@435 | 324 | |
duke@435 | 325 | #define align_object_size_(size) align_size_up_(size, MinObjAlignment) |
duke@435 | 326 | |
duke@435 | 327 | inline intptr_t align_object_size(intptr_t size) { |
duke@435 | 328 | return align_size_up(size, MinObjAlignment); |
duke@435 | 329 | } |
duke@435 | 330 | |
duke@435 | 331 | // Pad out certain offsets to jlong alignment, in HeapWord units. |
duke@435 | 332 | |
duke@435 | 333 | #define align_object_offset_(offset) align_size_up_(offset, HeapWordsPerLong) |
duke@435 | 334 | |
duke@435 | 335 | inline intptr_t align_object_offset(intptr_t offset) { |
duke@435 | 336 | return align_size_up(offset, HeapWordsPerLong); |
duke@435 | 337 | } |
duke@435 | 338 | |
duke@435 | 339 | inline bool is_object_aligned(intptr_t offset) { |
duke@435 | 340 | return offset == align_object_offset(offset); |
duke@435 | 341 | } |
duke@435 | 342 | |
duke@435 | 343 | |
duke@435 | 344 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 345 | // Utility macros for compilers |
duke@435 | 346 | // used to silence compiler warnings |
duke@435 | 347 | |
duke@435 | 348 | #define Unused_Variable(var) var |
duke@435 | 349 | |
duke@435 | 350 | |
duke@435 | 351 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 352 | // Miscellaneous |
duke@435 | 353 | |
duke@435 | 354 | // 6302670 Eliminate Hotspot __fabsf dependency |
duke@435 | 355 | // All fabs() callers should call this function instead, which will implicitly |
duke@435 | 356 | // convert the operand to double, avoiding a dependency on __fabsf which |
duke@435 | 357 | // doesn't exist in early versions of Solaris 8. |
duke@435 | 358 | inline double fabsd(double value) { |
duke@435 | 359 | return fabs(value); |
duke@435 | 360 | } |
duke@435 | 361 | |
duke@435 | 362 | inline jint low (jlong value) { return jint(value); } |
duke@435 | 363 | inline jint high(jlong value) { return jint(value >> 32); } |
duke@435 | 364 | |
duke@435 | 365 | // the fancy casts are a hopefully portable way |
duke@435 | 366 | // to do unsigned 32 to 64 bit type conversion |
duke@435 | 367 | inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32; |
duke@435 | 368 | *value |= (jlong)(julong)(juint)low; } |
duke@435 | 369 | |
duke@435 | 370 | inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff; |
duke@435 | 371 | *value |= (jlong)high << 32; } |
duke@435 | 372 | |
duke@435 | 373 | inline jlong jlong_from(jint h, jint l) { |
duke@435 | 374 | jlong result = 0; // initialization to avoid warning |
duke@435 | 375 | set_high(&result, h); |
duke@435 | 376 | set_low(&result, l); |
duke@435 | 377 | return result; |
duke@435 | 378 | } |
duke@435 | 379 | |
duke@435 | 380 | union jlong_accessor { |
duke@435 | 381 | jint words[2]; |
duke@435 | 382 | jlong long_value; |
duke@435 | 383 | }; |
duke@435 | 384 | |
coleenp@548 | 385 | void basic_types_init(); // cannot define here; uses assert |
duke@435 | 386 | |
duke@435 | 387 | |
duke@435 | 388 | // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java |
duke@435 | 389 | enum BasicType { |
duke@435 | 390 | T_BOOLEAN = 4, |
duke@435 | 391 | T_CHAR = 5, |
duke@435 | 392 | T_FLOAT = 6, |
duke@435 | 393 | T_DOUBLE = 7, |
duke@435 | 394 | T_BYTE = 8, |
duke@435 | 395 | T_SHORT = 9, |
duke@435 | 396 | T_INT = 10, |
duke@435 | 397 | T_LONG = 11, |
duke@435 | 398 | T_OBJECT = 12, |
duke@435 | 399 | T_ARRAY = 13, |
duke@435 | 400 | T_VOID = 14, |
duke@435 | 401 | T_ADDRESS = 15, |
coleenp@548 | 402 | T_NARROWOOP= 16, |
coleenp@548 | 403 | T_CONFLICT = 17, // for stack value type with conflicting contents |
duke@435 | 404 | T_ILLEGAL = 99 |
duke@435 | 405 | }; |
duke@435 | 406 | |
kvn@464 | 407 | inline bool is_java_primitive(BasicType t) { |
kvn@464 | 408 | return T_BOOLEAN <= t && t <= T_LONG; |
kvn@464 | 409 | } |
kvn@464 | 410 | |
duke@435 | 411 | // Convert a char from a classfile signature to a BasicType |
duke@435 | 412 | inline BasicType char2type(char c) { |
duke@435 | 413 | switch( c ) { |
duke@435 | 414 | case 'B': return T_BYTE; |
duke@435 | 415 | case 'C': return T_CHAR; |
duke@435 | 416 | case 'D': return T_DOUBLE; |
duke@435 | 417 | case 'F': return T_FLOAT; |
duke@435 | 418 | case 'I': return T_INT; |
duke@435 | 419 | case 'J': return T_LONG; |
duke@435 | 420 | case 'S': return T_SHORT; |
duke@435 | 421 | case 'Z': return T_BOOLEAN; |
duke@435 | 422 | case 'V': return T_VOID; |
duke@435 | 423 | case 'L': return T_OBJECT; |
duke@435 | 424 | case '[': return T_ARRAY; |
duke@435 | 425 | } |
duke@435 | 426 | return T_ILLEGAL; |
duke@435 | 427 | } |
duke@435 | 428 | |
duke@435 | 429 | extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar |
duke@435 | 430 | inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; } |
duke@435 | 431 | extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements |
duke@435 | 432 | extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar |
duke@435 | 433 | inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; } |
duke@435 | 434 | extern BasicType name2type(const char* name); |
duke@435 | 435 | |
duke@435 | 436 | // Auxilary math routines |
duke@435 | 437 | // least common multiple |
duke@435 | 438 | extern size_t lcm(size_t a, size_t b); |
duke@435 | 439 | |
duke@435 | 440 | |
duke@435 | 441 | // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java |
duke@435 | 442 | enum BasicTypeSize { |
duke@435 | 443 | T_BOOLEAN_size = 1, |
duke@435 | 444 | T_CHAR_size = 1, |
duke@435 | 445 | T_FLOAT_size = 1, |
duke@435 | 446 | T_DOUBLE_size = 2, |
duke@435 | 447 | T_BYTE_size = 1, |
duke@435 | 448 | T_SHORT_size = 1, |
duke@435 | 449 | T_INT_size = 1, |
duke@435 | 450 | T_LONG_size = 2, |
duke@435 | 451 | T_OBJECT_size = 1, |
duke@435 | 452 | T_ARRAY_size = 1, |
coleenp@548 | 453 | T_NARROWOOP_size = 1, |
duke@435 | 454 | T_VOID_size = 0 |
duke@435 | 455 | }; |
duke@435 | 456 | |
duke@435 | 457 | |
duke@435 | 458 | // maps a BasicType to its instance field storage type: |
duke@435 | 459 | // all sub-word integral types are widened to T_INT |
duke@435 | 460 | extern BasicType type2field[T_CONFLICT+1]; |
duke@435 | 461 | extern BasicType type2wfield[T_CONFLICT+1]; |
duke@435 | 462 | |
duke@435 | 463 | |
duke@435 | 464 | // size in bytes |
duke@435 | 465 | enum ArrayElementSize { |
duke@435 | 466 | T_BOOLEAN_aelem_bytes = 1, |
duke@435 | 467 | T_CHAR_aelem_bytes = 2, |
duke@435 | 468 | T_FLOAT_aelem_bytes = 4, |
duke@435 | 469 | T_DOUBLE_aelem_bytes = 8, |
duke@435 | 470 | T_BYTE_aelem_bytes = 1, |
duke@435 | 471 | T_SHORT_aelem_bytes = 2, |
duke@435 | 472 | T_INT_aelem_bytes = 4, |
duke@435 | 473 | T_LONG_aelem_bytes = 8, |
duke@435 | 474 | #ifdef _LP64 |
duke@435 | 475 | T_OBJECT_aelem_bytes = 8, |
duke@435 | 476 | T_ARRAY_aelem_bytes = 8, |
duke@435 | 477 | #else |
duke@435 | 478 | T_OBJECT_aelem_bytes = 4, |
duke@435 | 479 | T_ARRAY_aelem_bytes = 4, |
duke@435 | 480 | #endif |
coleenp@548 | 481 | T_NARROWOOP_aelem_bytes = 4, |
duke@435 | 482 | T_VOID_aelem_bytes = 0 |
duke@435 | 483 | }; |
duke@435 | 484 | |
kvn@464 | 485 | extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element |
kvn@464 | 486 | #ifdef ASSERT |
kvn@464 | 487 | extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts |
kvn@464 | 488 | #else |
kvn@464 | 489 | inline int type2aelembytes(BasicType t) { return _type2aelembytes[t]; } |
kvn@464 | 490 | #endif |
duke@435 | 491 | |
duke@435 | 492 | |
duke@435 | 493 | // JavaValue serves as a container for arbitrary Java values. |
duke@435 | 494 | |
duke@435 | 495 | class JavaValue { |
duke@435 | 496 | |
duke@435 | 497 | public: |
duke@435 | 498 | typedef union JavaCallValue { |
duke@435 | 499 | jfloat f; |
duke@435 | 500 | jdouble d; |
duke@435 | 501 | jint i; |
duke@435 | 502 | jlong l; |
duke@435 | 503 | jobject h; |
duke@435 | 504 | } JavaCallValue; |
duke@435 | 505 | |
duke@435 | 506 | private: |
duke@435 | 507 | BasicType _type; |
duke@435 | 508 | JavaCallValue _value; |
duke@435 | 509 | |
duke@435 | 510 | public: |
duke@435 | 511 | JavaValue(BasicType t = T_ILLEGAL) { _type = t; } |
duke@435 | 512 | |
duke@435 | 513 | JavaValue(jfloat value) { |
duke@435 | 514 | _type = T_FLOAT; |
duke@435 | 515 | _value.f = value; |
duke@435 | 516 | } |
duke@435 | 517 | |
duke@435 | 518 | JavaValue(jdouble value) { |
duke@435 | 519 | _type = T_DOUBLE; |
duke@435 | 520 | _value.d = value; |
duke@435 | 521 | } |
duke@435 | 522 | |
duke@435 | 523 | jfloat get_jfloat() const { return _value.f; } |
duke@435 | 524 | jdouble get_jdouble() const { return _value.d; } |
duke@435 | 525 | jint get_jint() const { return _value.i; } |
duke@435 | 526 | jlong get_jlong() const { return _value.l; } |
duke@435 | 527 | jobject get_jobject() const { return _value.h; } |
duke@435 | 528 | JavaCallValue* get_value_addr() { return &_value; } |
duke@435 | 529 | BasicType get_type() const { return _type; } |
duke@435 | 530 | |
duke@435 | 531 | void set_jfloat(jfloat f) { _value.f = f;} |
duke@435 | 532 | void set_jdouble(jdouble d) { _value.d = d;} |
duke@435 | 533 | void set_jint(jint i) { _value.i = i;} |
duke@435 | 534 | void set_jlong(jlong l) { _value.l = l;} |
duke@435 | 535 | void set_jobject(jobject h) { _value.h = h;} |
duke@435 | 536 | void set_type(BasicType t) { _type = t; } |
duke@435 | 537 | |
duke@435 | 538 | jboolean get_jboolean() const { return (jboolean) (_value.i);} |
duke@435 | 539 | jbyte get_jbyte() const { return (jbyte) (_value.i);} |
duke@435 | 540 | jchar get_jchar() const { return (jchar) (_value.i);} |
duke@435 | 541 | jshort get_jshort() const { return (jshort) (_value.i);} |
duke@435 | 542 | |
duke@435 | 543 | }; |
duke@435 | 544 | |
duke@435 | 545 | |
duke@435 | 546 | #define STACK_BIAS 0 |
duke@435 | 547 | // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff |
duke@435 | 548 | // in order to extend the reach of the stack pointer. |
duke@435 | 549 | #if defined(SPARC) && defined(_LP64) |
duke@435 | 550 | #undef STACK_BIAS |
duke@435 | 551 | #define STACK_BIAS 0x7ff |
duke@435 | 552 | #endif |
duke@435 | 553 | |
duke@435 | 554 | |
duke@435 | 555 | // TosState describes the top-of-stack state before and after the execution of |
duke@435 | 556 | // a bytecode or method. The top-of-stack value may be cached in one or more CPU |
duke@435 | 557 | // registers. The TosState corresponds to the 'machine represention' of this cached |
duke@435 | 558 | // value. There's 4 states corresponding to the JAVA types int, long, float & double |
duke@435 | 559 | // as well as a 5th state in case the top-of-stack value is actually on the top |
duke@435 | 560 | // of stack (in memory) and thus not cached. The atos state corresponds to the itos |
duke@435 | 561 | // state when it comes to machine representation but is used separately for (oop) |
duke@435 | 562 | // type specific operations (e.g. verification code). |
duke@435 | 563 | |
duke@435 | 564 | enum TosState { // describes the tos cache contents |
duke@435 | 565 | btos = 0, // byte, bool tos cached |
duke@435 | 566 | ctos = 1, // short, char tos cached |
duke@435 | 567 | stos = 2, // short, char tos cached |
duke@435 | 568 | itos = 3, // int tos cached |
duke@435 | 569 | ltos = 4, // long tos cached |
duke@435 | 570 | ftos = 5, // float tos cached |
duke@435 | 571 | dtos = 6, // double tos cached |
duke@435 | 572 | atos = 7, // object cached |
duke@435 | 573 | vtos = 8, // tos not cached |
duke@435 | 574 | number_of_states, |
duke@435 | 575 | ilgl // illegal state: should not occur |
duke@435 | 576 | }; |
duke@435 | 577 | |
duke@435 | 578 | |
duke@435 | 579 | inline TosState as_TosState(BasicType type) { |
duke@435 | 580 | switch (type) { |
duke@435 | 581 | case T_BYTE : return btos; |
duke@435 | 582 | case T_BOOLEAN: return btos; |
duke@435 | 583 | case T_CHAR : return ctos; |
duke@435 | 584 | case T_SHORT : return stos; |
duke@435 | 585 | case T_INT : return itos; |
duke@435 | 586 | case T_LONG : return ltos; |
duke@435 | 587 | case T_FLOAT : return ftos; |
duke@435 | 588 | case T_DOUBLE : return dtos; |
duke@435 | 589 | case T_VOID : return vtos; |
duke@435 | 590 | case T_ARRAY : // fall through |
duke@435 | 591 | case T_OBJECT : return atos; |
duke@435 | 592 | } |
duke@435 | 593 | return ilgl; |
duke@435 | 594 | } |
duke@435 | 595 | |
duke@435 | 596 | |
duke@435 | 597 | // Helper function to convert BasicType info into TosState |
duke@435 | 598 | // Note: Cannot define here as it uses global constant at the time being. |
duke@435 | 599 | TosState as_TosState(BasicType type); |
duke@435 | 600 | |
duke@435 | 601 | |
duke@435 | 602 | // ReferenceType is used to distinguish between java/lang/ref/Reference subclasses |
duke@435 | 603 | |
duke@435 | 604 | enum ReferenceType { |
duke@435 | 605 | REF_NONE, // Regular class |
duke@435 | 606 | REF_OTHER, // Subclass of java/lang/ref/Reference, but not subclass of one of the classes below |
duke@435 | 607 | REF_SOFT, // Subclass of java/lang/ref/SoftReference |
duke@435 | 608 | REF_WEAK, // Subclass of java/lang/ref/WeakReference |
duke@435 | 609 | REF_FINAL, // Subclass of java/lang/ref/FinalReference |
duke@435 | 610 | REF_PHANTOM // Subclass of java/lang/ref/PhantomReference |
duke@435 | 611 | }; |
duke@435 | 612 | |
duke@435 | 613 | |
duke@435 | 614 | // JavaThreadState keeps track of which part of the code a thread is executing in. This |
duke@435 | 615 | // information is needed by the safepoint code. |
duke@435 | 616 | // |
duke@435 | 617 | // There are 4 essential states: |
duke@435 | 618 | // |
duke@435 | 619 | // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code) |
duke@435 | 620 | // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles |
duke@435 | 621 | // _thread_in_vm : Executing in the vm |
duke@435 | 622 | // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub) |
duke@435 | 623 | // |
duke@435 | 624 | // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in |
duke@435 | 625 | // a transition from one state to another. These extra states makes it possible for the safepoint code to |
duke@435 | 626 | // handle certain thread_states without having to suspend the thread - making the safepoint code faster. |
duke@435 | 627 | // |
duke@435 | 628 | // Given a state, the xxx_trans state can always be found by adding 1. |
duke@435 | 629 | // |
duke@435 | 630 | enum JavaThreadState { |
duke@435 | 631 | _thread_uninitialized = 0, // should never happen (missing initialization) |
duke@435 | 632 | _thread_new = 2, // just starting up, i.e., in process of being initialized |
duke@435 | 633 | _thread_new_trans = 3, // corresponding transition state (not used, included for completness) |
duke@435 | 634 | _thread_in_native = 4, // running in native code |
duke@435 | 635 | _thread_in_native_trans = 5, // corresponding transition state |
duke@435 | 636 | _thread_in_vm = 6, // running in VM |
duke@435 | 637 | _thread_in_vm_trans = 7, // corresponding transition state |
duke@435 | 638 | _thread_in_Java = 8, // running in Java or in stub code |
duke@435 | 639 | _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness) |
duke@435 | 640 | _thread_blocked = 10, // blocked in vm |
duke@435 | 641 | _thread_blocked_trans = 11, // corresponding transition state |
duke@435 | 642 | _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation |
duke@435 | 643 | }; |
duke@435 | 644 | |
duke@435 | 645 | |
duke@435 | 646 | // Handy constants for deciding which compiler mode to use. |
duke@435 | 647 | enum MethodCompilation { |
duke@435 | 648 | InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation |
duke@435 | 649 | InvalidOSREntryBci = -2 |
duke@435 | 650 | }; |
duke@435 | 651 | |
duke@435 | 652 | // Enumeration to distinguish tiers of compilation |
duke@435 | 653 | enum CompLevel { |
duke@435 | 654 | CompLevel_none = 0, |
duke@435 | 655 | CompLevel_fast_compile = 1, |
duke@435 | 656 | CompLevel_full_optimization = 2, |
duke@435 | 657 | |
duke@435 | 658 | CompLevel_highest_tier = CompLevel_full_optimization, |
duke@435 | 659 | #ifdef TIERED |
duke@435 | 660 | CompLevel_initial_compile = CompLevel_fast_compile |
duke@435 | 661 | #else |
duke@435 | 662 | CompLevel_initial_compile = CompLevel_full_optimization |
duke@435 | 663 | #endif // TIERED |
duke@435 | 664 | }; |
duke@435 | 665 | |
duke@435 | 666 | inline bool is_tier1_compile(int comp_level) { |
duke@435 | 667 | return comp_level == CompLevel_fast_compile; |
duke@435 | 668 | } |
duke@435 | 669 | inline bool is_tier2_compile(int comp_level) { |
duke@435 | 670 | return comp_level == CompLevel_full_optimization; |
duke@435 | 671 | } |
duke@435 | 672 | inline bool is_highest_tier_compile(int comp_level) { |
duke@435 | 673 | return comp_level == CompLevel_highest_tier; |
duke@435 | 674 | } |
duke@435 | 675 | |
duke@435 | 676 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 677 | // 'Forward' declarations of frequently used classes |
duke@435 | 678 | // (in order to reduce interface dependencies & reduce |
duke@435 | 679 | // number of unnecessary compilations after changes) |
duke@435 | 680 | |
duke@435 | 681 | class symbolTable; |
duke@435 | 682 | class ClassFileStream; |
duke@435 | 683 | |
duke@435 | 684 | class Event; |
duke@435 | 685 | |
duke@435 | 686 | class Thread; |
duke@435 | 687 | class VMThread; |
duke@435 | 688 | class JavaThread; |
duke@435 | 689 | class Threads; |
duke@435 | 690 | |
duke@435 | 691 | class VM_Operation; |
duke@435 | 692 | class VMOperationQueue; |
duke@435 | 693 | |
duke@435 | 694 | class CodeBlob; |
duke@435 | 695 | class nmethod; |
duke@435 | 696 | class OSRAdapter; |
duke@435 | 697 | class I2CAdapter; |
duke@435 | 698 | class C2IAdapter; |
duke@435 | 699 | class CompiledIC; |
duke@435 | 700 | class relocInfo; |
duke@435 | 701 | class ScopeDesc; |
duke@435 | 702 | class PcDesc; |
duke@435 | 703 | |
duke@435 | 704 | class Recompiler; |
duke@435 | 705 | class Recompilee; |
duke@435 | 706 | class RecompilationPolicy; |
duke@435 | 707 | class RFrame; |
duke@435 | 708 | class CompiledRFrame; |
duke@435 | 709 | class InterpretedRFrame; |
duke@435 | 710 | |
duke@435 | 711 | class frame; |
duke@435 | 712 | |
duke@435 | 713 | class vframe; |
duke@435 | 714 | class javaVFrame; |
duke@435 | 715 | class interpretedVFrame; |
duke@435 | 716 | class compiledVFrame; |
duke@435 | 717 | class deoptimizedVFrame; |
duke@435 | 718 | class externalVFrame; |
duke@435 | 719 | class entryVFrame; |
duke@435 | 720 | |
duke@435 | 721 | class RegisterMap; |
duke@435 | 722 | |
duke@435 | 723 | class Mutex; |
duke@435 | 724 | class Monitor; |
duke@435 | 725 | class BasicLock; |
duke@435 | 726 | class BasicObjectLock; |
duke@435 | 727 | |
duke@435 | 728 | class PeriodicTask; |
duke@435 | 729 | |
duke@435 | 730 | class JavaCallWrapper; |
duke@435 | 731 | |
duke@435 | 732 | class oopDesc; |
duke@435 | 733 | |
duke@435 | 734 | class NativeCall; |
duke@435 | 735 | |
duke@435 | 736 | class zone; |
duke@435 | 737 | |
duke@435 | 738 | class StubQueue; |
duke@435 | 739 | |
duke@435 | 740 | class outputStream; |
duke@435 | 741 | |
duke@435 | 742 | class ResourceArea; |
duke@435 | 743 | |
duke@435 | 744 | class DebugInformationRecorder; |
duke@435 | 745 | class ScopeValue; |
duke@435 | 746 | class CompressedStream; |
duke@435 | 747 | class DebugInfoReadStream; |
duke@435 | 748 | class DebugInfoWriteStream; |
duke@435 | 749 | class LocationValue; |
duke@435 | 750 | class ConstantValue; |
duke@435 | 751 | class IllegalValue; |
duke@435 | 752 | |
duke@435 | 753 | class PrivilegedElement; |
duke@435 | 754 | class MonitorArray; |
duke@435 | 755 | |
duke@435 | 756 | class MonitorInfo; |
duke@435 | 757 | |
duke@435 | 758 | class OffsetClosure; |
duke@435 | 759 | class OopMapCache; |
duke@435 | 760 | class InterpreterOopMap; |
duke@435 | 761 | class OopMapCacheEntry; |
duke@435 | 762 | class OSThread; |
duke@435 | 763 | |
duke@435 | 764 | typedef int (*OSThreadStartFunc)(void*); |
duke@435 | 765 | |
duke@435 | 766 | class Space; |
duke@435 | 767 | |
duke@435 | 768 | class JavaValue; |
duke@435 | 769 | class methodHandle; |
duke@435 | 770 | class JavaCallArguments; |
duke@435 | 771 | |
duke@435 | 772 | // Basic support for errors (general debug facilities not defined at this point fo the include phase) |
duke@435 | 773 | |
duke@435 | 774 | extern void basic_fatal(const char* msg); |
duke@435 | 775 | |
duke@435 | 776 | |
duke@435 | 777 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 778 | // Special constants for debugging |
duke@435 | 779 | |
duke@435 | 780 | const jint badInt = -3; // generic "bad int" value |
duke@435 | 781 | const long badAddressVal = -2; // generic "bad address" value |
duke@435 | 782 | const long badOopVal = -1; // generic "bad oop" value |
duke@435 | 783 | const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC |
duke@435 | 784 | const int badHandleValue = 0xBC; // value used to zap vm handle area |
duke@435 | 785 | const int badResourceValue = 0xAB; // value used to zap resource area |
duke@435 | 786 | const int freeBlockPad = 0xBA; // value used to pad freed blocks. |
duke@435 | 787 | const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks. |
duke@435 | 788 | const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area |
duke@435 | 789 | const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC |
duke@435 | 790 | const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation |
duke@435 | 791 | const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation |
duke@435 | 792 | |
duke@435 | 793 | |
duke@435 | 794 | // (These must be implemented as #defines because C++ compilers are |
duke@435 | 795 | // not obligated to inline non-integral constants!) |
duke@435 | 796 | #define badAddress ((address)::badAddressVal) |
duke@435 | 797 | #define badOop ((oop)::badOopVal) |
duke@435 | 798 | #define badHeapWord (::badHeapWordVal) |
duke@435 | 799 | #define badJNIHandle ((oop)::badJNIHandleVal) |
duke@435 | 800 | |
duke@435 | 801 | |
duke@435 | 802 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 803 | // Utility functions for bitfield manipulations |
duke@435 | 804 | |
duke@435 | 805 | const intptr_t AllBits = ~0; // all bits set in a word |
duke@435 | 806 | const intptr_t NoBits = 0; // no bits set in a word |
duke@435 | 807 | const jlong NoLongBits = 0; // no bits set in a long |
duke@435 | 808 | const intptr_t OneBit = 1; // only right_most bit set in a word |
duke@435 | 809 | |
duke@435 | 810 | // get a word with the n.th or the right-most or left-most n bits set |
duke@435 | 811 | // (note: #define used only so that they can be used in enum constant definitions) |
duke@435 | 812 | #define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n)) |
duke@435 | 813 | #define right_n_bits(n) (nth_bit(n) - 1) |
duke@435 | 814 | #define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n))) |
duke@435 | 815 | |
duke@435 | 816 | // bit-operations using a mask m |
duke@435 | 817 | inline void set_bits (intptr_t& x, intptr_t m) { x |= m; } |
duke@435 | 818 | inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; } |
duke@435 | 819 | inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; } |
duke@435 | 820 | inline jlong mask_long_bits (jlong x, jlong m) { return x & m; } |
duke@435 | 821 | inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; } |
duke@435 | 822 | |
duke@435 | 823 | // bit-operations using the n.th bit |
duke@435 | 824 | inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); } |
duke@435 | 825 | inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); } |
duke@435 | 826 | inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; } |
duke@435 | 827 | |
duke@435 | 828 | // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!) |
duke@435 | 829 | inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) { |
duke@435 | 830 | return mask_bits(x >> start_bit_no, right_n_bits(field_length)); |
duke@435 | 831 | } |
duke@435 | 832 | |
duke@435 | 833 | |
duke@435 | 834 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 835 | // Utility functions for integers |
duke@435 | 836 | |
duke@435 | 837 | // Avoid use of global min/max macros which may cause unwanted double |
duke@435 | 838 | // evaluation of arguments. |
duke@435 | 839 | #ifdef max |
duke@435 | 840 | #undef max |
duke@435 | 841 | #endif |
duke@435 | 842 | |
duke@435 | 843 | #ifdef min |
duke@435 | 844 | #undef min |
duke@435 | 845 | #endif |
duke@435 | 846 | |
duke@435 | 847 | #define max(a,b) Do_not_use_max_use_MAX2_instead |
duke@435 | 848 | #define min(a,b) Do_not_use_min_use_MIN2_instead |
duke@435 | 849 | |
duke@435 | 850 | // It is necessary to use templates here. Having normal overloaded |
duke@435 | 851 | // functions does not work because it is necessary to provide both 32- |
duke@435 | 852 | // and 64-bit overloaded functions, which does not work, and having |
duke@435 | 853 | // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L) |
duke@435 | 854 | // will be even more error-prone than macros. |
duke@435 | 855 | template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; } |
duke@435 | 856 | template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; } |
duke@435 | 857 | template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); } |
duke@435 | 858 | template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); } |
duke@435 | 859 | template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); } |
duke@435 | 860 | template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); } |
duke@435 | 861 | |
duke@435 | 862 | template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; } |
duke@435 | 863 | |
duke@435 | 864 | // true if x is a power of 2, false otherwise |
duke@435 | 865 | inline bool is_power_of_2(intptr_t x) { |
duke@435 | 866 | return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits)); |
duke@435 | 867 | } |
duke@435 | 868 | |
duke@435 | 869 | // long version of is_power_of_2 |
duke@435 | 870 | inline bool is_power_of_2_long(jlong x) { |
duke@435 | 871 | return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits)); |
duke@435 | 872 | } |
duke@435 | 873 | |
duke@435 | 874 | //* largest i such that 2^i <= x |
duke@435 | 875 | // A negative value of 'x' will return '31' |
duke@435 | 876 | inline int log2_intptr(intptr_t x) { |
duke@435 | 877 | int i = -1; |
duke@435 | 878 | uintptr_t p = 1; |
duke@435 | 879 | while (p != 0 && p <= (uintptr_t)x) { |
duke@435 | 880 | // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) |
duke@435 | 881 | i++; p *= 2; |
duke@435 | 882 | } |
duke@435 | 883 | // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) |
twisti@1040 | 884 | // (if p = 0 then overflow occurred and i = 31) |
duke@435 | 885 | return i; |
duke@435 | 886 | } |
duke@435 | 887 | |
duke@435 | 888 | //* largest i such that 2^i <= x |
duke@435 | 889 | // A negative value of 'x' will return '63' |
duke@435 | 890 | inline int log2_long(jlong x) { |
duke@435 | 891 | int i = -1; |
duke@435 | 892 | julong p = 1; |
duke@435 | 893 | while (p != 0 && p <= (julong)x) { |
duke@435 | 894 | // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) |
duke@435 | 895 | i++; p *= 2; |
duke@435 | 896 | } |
duke@435 | 897 | // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) |
twisti@1040 | 898 | // (if p = 0 then overflow occurred and i = 63) |
duke@435 | 899 | return i; |
duke@435 | 900 | } |
duke@435 | 901 | |
duke@435 | 902 | //* the argument must be exactly a power of 2 |
duke@435 | 903 | inline int exact_log2(intptr_t x) { |
duke@435 | 904 | #ifdef ASSERT |
duke@435 | 905 | if (!is_power_of_2(x)) basic_fatal("x must be a power of 2"); |
duke@435 | 906 | #endif |
duke@435 | 907 | return log2_intptr(x); |
duke@435 | 908 | } |
duke@435 | 909 | |
twisti@1003 | 910 | //* the argument must be exactly a power of 2 |
twisti@1003 | 911 | inline int exact_log2_long(jlong x) { |
twisti@1003 | 912 | #ifdef ASSERT |
twisti@1003 | 913 | if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2"); |
twisti@1003 | 914 | #endif |
twisti@1003 | 915 | return log2_long(x); |
twisti@1003 | 916 | } |
twisti@1003 | 917 | |
duke@435 | 918 | |
duke@435 | 919 | // returns integer round-up to the nearest multiple of s (s must be a power of two) |
duke@435 | 920 | inline intptr_t round_to(intptr_t x, uintx s) { |
duke@435 | 921 | #ifdef ASSERT |
duke@435 | 922 | if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); |
duke@435 | 923 | #endif |
duke@435 | 924 | const uintx m = s - 1; |
duke@435 | 925 | return mask_bits(x + m, ~m); |
duke@435 | 926 | } |
duke@435 | 927 | |
duke@435 | 928 | // returns integer round-down to the nearest multiple of s (s must be a power of two) |
duke@435 | 929 | inline intptr_t round_down(intptr_t x, uintx s) { |
duke@435 | 930 | #ifdef ASSERT |
duke@435 | 931 | if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); |
duke@435 | 932 | #endif |
duke@435 | 933 | const uintx m = s - 1; |
duke@435 | 934 | return mask_bits(x, ~m); |
duke@435 | 935 | } |
duke@435 | 936 | |
duke@435 | 937 | |
duke@435 | 938 | inline bool is_odd (intx x) { return x & 1; } |
duke@435 | 939 | inline bool is_even(intx x) { return !is_odd(x); } |
duke@435 | 940 | |
duke@435 | 941 | // "to" should be greater than "from." |
duke@435 | 942 | inline intx byte_size(void* from, void* to) { |
duke@435 | 943 | return (address)to - (address)from; |
duke@435 | 944 | } |
duke@435 | 945 | |
duke@435 | 946 | //---------------------------------------------------------------------------------------------------- |
duke@435 | 947 | // Avoid non-portable casts with these routines (DEPRECATED) |
duke@435 | 948 | |
duke@435 | 949 | // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE |
duke@435 | 950 | // Bytes is optimized machine-specifically and may be much faster then the portable routines below. |
duke@435 | 951 | |
duke@435 | 952 | // Given sequence of four bytes, build into a 32-bit word |
duke@435 | 953 | // following the conventions used in class files. |
duke@435 | 954 | // On the 386, this could be realized with a simple address cast. |
duke@435 | 955 | // |
duke@435 | 956 | |
duke@435 | 957 | // This routine takes eight bytes: |
duke@435 | 958 | inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { |
duke@435 | 959 | return ( u8(c1) << 56 ) & ( u8(0xff) << 56 ) |
duke@435 | 960 | | ( u8(c2) << 48 ) & ( u8(0xff) << 48 ) |
duke@435 | 961 | | ( u8(c3) << 40 ) & ( u8(0xff) << 40 ) |
duke@435 | 962 | | ( u8(c4) << 32 ) & ( u8(0xff) << 32 ) |
duke@435 | 963 | | ( u8(c5) << 24 ) & ( u8(0xff) << 24 ) |
duke@435 | 964 | | ( u8(c6) << 16 ) & ( u8(0xff) << 16 ) |
duke@435 | 965 | | ( u8(c7) << 8 ) & ( u8(0xff) << 8 ) |
duke@435 | 966 | | ( u8(c8) << 0 ) & ( u8(0xff) << 0 ); |
duke@435 | 967 | } |
duke@435 | 968 | |
duke@435 | 969 | // This routine takes four bytes: |
duke@435 | 970 | inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { |
duke@435 | 971 | return ( u4(c1) << 24 ) & 0xff000000 |
duke@435 | 972 | | ( u4(c2) << 16 ) & 0x00ff0000 |
duke@435 | 973 | | ( u4(c3) << 8 ) & 0x0000ff00 |
duke@435 | 974 | | ( u4(c4) << 0 ) & 0x000000ff; |
duke@435 | 975 | } |
duke@435 | 976 | |
duke@435 | 977 | // And this one works if the four bytes are contiguous in memory: |
duke@435 | 978 | inline u4 build_u4_from( u1* p ) { |
duke@435 | 979 | return build_u4_from( p[0], p[1], p[2], p[3] ); |
duke@435 | 980 | } |
duke@435 | 981 | |
duke@435 | 982 | // Ditto for two-byte ints: |
duke@435 | 983 | inline u2 build_u2_from( u1 c1, u1 c2 ) { |
duke@435 | 984 | return u2(( u2(c1) << 8 ) & 0xff00 |
duke@435 | 985 | | ( u2(c2) << 0 ) & 0x00ff); |
duke@435 | 986 | } |
duke@435 | 987 | |
duke@435 | 988 | // And this one works if the two bytes are contiguous in memory: |
duke@435 | 989 | inline u2 build_u2_from( u1* p ) { |
duke@435 | 990 | return build_u2_from( p[0], p[1] ); |
duke@435 | 991 | } |
duke@435 | 992 | |
duke@435 | 993 | // Ditto for floats: |
duke@435 | 994 | inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { |
duke@435 | 995 | u4 u = build_u4_from( c1, c2, c3, c4 ); |
duke@435 | 996 | return *(jfloat*)&u; |
duke@435 | 997 | } |
duke@435 | 998 | |
duke@435 | 999 | inline jfloat build_float_from( u1* p ) { |
duke@435 | 1000 | u4 u = build_u4_from( p ); |
duke@435 | 1001 | return *(jfloat*)&u; |
duke@435 | 1002 | } |
duke@435 | 1003 | |
duke@435 | 1004 | |
duke@435 | 1005 | // now (64-bit) longs |
duke@435 | 1006 | |
duke@435 | 1007 | inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { |
duke@435 | 1008 | return ( jlong(c1) << 56 ) & ( jlong(0xff) << 56 ) |
duke@435 | 1009 | | ( jlong(c2) << 48 ) & ( jlong(0xff) << 48 ) |
duke@435 | 1010 | | ( jlong(c3) << 40 ) & ( jlong(0xff) << 40 ) |
duke@435 | 1011 | | ( jlong(c4) << 32 ) & ( jlong(0xff) << 32 ) |
duke@435 | 1012 | | ( jlong(c5) << 24 ) & ( jlong(0xff) << 24 ) |
duke@435 | 1013 | | ( jlong(c6) << 16 ) & ( jlong(0xff) << 16 ) |
duke@435 | 1014 | | ( jlong(c7) << 8 ) & ( jlong(0xff) << 8 ) |
duke@435 | 1015 | | ( jlong(c8) << 0 ) & ( jlong(0xff) << 0 ); |
duke@435 | 1016 | } |
duke@435 | 1017 | |
duke@435 | 1018 | inline jlong build_long_from( u1* p ) { |
duke@435 | 1019 | return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] ); |
duke@435 | 1020 | } |
duke@435 | 1021 | |
duke@435 | 1022 | |
duke@435 | 1023 | // Doubles, too! |
duke@435 | 1024 | inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { |
duke@435 | 1025 | jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 ); |
duke@435 | 1026 | return *(jdouble*)&u; |
duke@435 | 1027 | } |
duke@435 | 1028 | |
duke@435 | 1029 | inline jdouble build_double_from( u1* p ) { |
duke@435 | 1030 | jlong u = build_long_from( p ); |
duke@435 | 1031 | return *(jdouble*)&u; |
duke@435 | 1032 | } |
duke@435 | 1033 | |
duke@435 | 1034 | |
duke@435 | 1035 | // Portable routines to go the other way: |
duke@435 | 1036 | |
duke@435 | 1037 | inline void explode_short_to( u2 x, u1& c1, u1& c2 ) { |
duke@435 | 1038 | c1 = u1(x >> 8); |
duke@435 | 1039 | c2 = u1(x); |
duke@435 | 1040 | } |
duke@435 | 1041 | |
duke@435 | 1042 | inline void explode_short_to( u2 x, u1* p ) { |
duke@435 | 1043 | explode_short_to( x, p[0], p[1]); |
duke@435 | 1044 | } |
duke@435 | 1045 | |
duke@435 | 1046 | inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) { |
duke@435 | 1047 | c1 = u1(x >> 24); |
duke@435 | 1048 | c2 = u1(x >> 16); |
duke@435 | 1049 | c3 = u1(x >> 8); |
duke@435 | 1050 | c4 = u1(x); |
duke@435 | 1051 | } |
duke@435 | 1052 | |
duke@435 | 1053 | inline void explode_int_to( u4 x, u1* p ) { |
duke@435 | 1054 | explode_int_to( x, p[0], p[1], p[2], p[3]); |
duke@435 | 1055 | } |
duke@435 | 1056 | |
duke@435 | 1057 | |
duke@435 | 1058 | // Pack and extract shorts to/from ints: |
duke@435 | 1059 | |
duke@435 | 1060 | inline int extract_low_short_from_int(jint x) { |
duke@435 | 1061 | return x & 0xffff; |
duke@435 | 1062 | } |
duke@435 | 1063 | |
duke@435 | 1064 | inline int extract_high_short_from_int(jint x) { |
duke@435 | 1065 | return (x >> 16) & 0xffff; |
duke@435 | 1066 | } |
duke@435 | 1067 | |
duke@435 | 1068 | inline int build_int_from_shorts( jushort low, jushort high ) { |
duke@435 | 1069 | return ((int)((unsigned int)high << 16) | (unsigned int)low); |
duke@435 | 1070 | } |
duke@435 | 1071 | |
duke@435 | 1072 | // Printf-style formatters for fixed- and variable-width types as pointers and |
duke@435 | 1073 | // integers. |
duke@435 | 1074 | // |
duke@435 | 1075 | // Each compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp) |
duke@435 | 1076 | // must define the macro FORMAT64_MODIFIER, which is the modifier for '%x' or |
duke@435 | 1077 | // '%d' formats to indicate a 64-bit quantity; commonly "l" (in LP64) or "ll" |
duke@435 | 1078 | // (in ILP32). |
duke@435 | 1079 | |
duke@435 | 1080 | // Format 32-bit quantities. |
duke@435 | 1081 | #define INT32_FORMAT "%d" |
duke@435 | 1082 | #define UINT32_FORMAT "%u" |
duke@435 | 1083 | #define INT32_FORMAT_W(width) "%" #width "d" |
duke@435 | 1084 | #define UINT32_FORMAT_W(width) "%" #width "u" |
duke@435 | 1085 | |
duke@435 | 1086 | #define PTR32_FORMAT "0x%08x" |
duke@435 | 1087 | |
duke@435 | 1088 | // Format 64-bit quantities. |
duke@435 | 1089 | #define INT64_FORMAT "%" FORMAT64_MODIFIER "d" |
duke@435 | 1090 | #define UINT64_FORMAT "%" FORMAT64_MODIFIER "u" |
duke@435 | 1091 | #define PTR64_FORMAT "0x%016" FORMAT64_MODIFIER "x" |
duke@435 | 1092 | |
duke@435 | 1093 | #define INT64_FORMAT_W(width) "%" #width FORMAT64_MODIFIER "d" |
duke@435 | 1094 | #define UINT64_FORMAT_W(width) "%" #width FORMAT64_MODIFIER "u" |
duke@435 | 1095 | |
duke@435 | 1096 | // Format macros that allow the field width to be specified. The width must be |
duke@435 | 1097 | // a string literal (e.g., "8") or a macro that evaluates to one. |
duke@435 | 1098 | #ifdef _LP64 |
xlu@948 | 1099 | #define UINTX_FORMAT_W(width) UINT64_FORMAT_W(width) |
duke@435 | 1100 | #define SSIZE_FORMAT_W(width) INT64_FORMAT_W(width) |
duke@435 | 1101 | #define SIZE_FORMAT_W(width) UINT64_FORMAT_W(width) |
duke@435 | 1102 | #else |
xlu@948 | 1103 | #define UINTX_FORMAT_W(width) UINT32_FORMAT_W(width) |
duke@435 | 1104 | #define SSIZE_FORMAT_W(width) INT32_FORMAT_W(width) |
duke@435 | 1105 | #define SIZE_FORMAT_W(width) UINT32_FORMAT_W(width) |
duke@435 | 1106 | #endif // _LP64 |
duke@435 | 1107 | |
duke@435 | 1108 | // Format pointers and size_t (or size_t-like integer types) which change size |
xlu@948 | 1109 | // between 32- and 64-bit. The pointer format theoretically should be "%p", |
xlu@948 | 1110 | // however, it has different output on different platforms. On Windows, the data |
xlu@948 | 1111 | // will be padded with zeros automatically. On Solaris, we can use "%016p" & |
xlu@948 | 1112 | // "%08p" on 64 bit & 32 bit platforms to make the data padded with extra zeros. |
xlu@948 | 1113 | // On Linux, "%016p" or "%08p" is not be allowed, at least on the latest GCC |
xlu@948 | 1114 | // 4.3.2. So we have to use "%016x" or "%08x" to simulate the printing format. |
xlu@948 | 1115 | // GCC 4.3.2, however requires the data to be converted to "intptr_t" when |
xlu@948 | 1116 | // using "%x". |
duke@435 | 1117 | #ifdef _LP64 |
duke@435 | 1118 | #define PTR_FORMAT PTR64_FORMAT |
duke@435 | 1119 | #define UINTX_FORMAT UINT64_FORMAT |
duke@435 | 1120 | #define INTX_FORMAT INT64_FORMAT |
duke@435 | 1121 | #define SIZE_FORMAT UINT64_FORMAT |
duke@435 | 1122 | #define SSIZE_FORMAT INT64_FORMAT |
duke@435 | 1123 | #else // !_LP64 |
duke@435 | 1124 | #define PTR_FORMAT PTR32_FORMAT |
duke@435 | 1125 | #define UINTX_FORMAT UINT32_FORMAT |
duke@435 | 1126 | #define INTX_FORMAT INT32_FORMAT |
duke@435 | 1127 | #define SIZE_FORMAT UINT32_FORMAT |
duke@435 | 1128 | #define SSIZE_FORMAT INT32_FORMAT |
duke@435 | 1129 | #endif // _LP64 |
duke@435 | 1130 | |
duke@435 | 1131 | #define INTPTR_FORMAT PTR_FORMAT |
duke@435 | 1132 | |
duke@435 | 1133 | // Enable zap-a-lot if in debug version. |
duke@435 | 1134 | |
duke@435 | 1135 | # ifdef ASSERT |
duke@435 | 1136 | # ifdef COMPILER2 |
duke@435 | 1137 | # define ENABLE_ZAP_DEAD_LOCALS |
duke@435 | 1138 | #endif /* COMPILER2 */ |
duke@435 | 1139 | # endif /* ASSERT */ |
duke@435 | 1140 | |
duke@435 | 1141 | #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0])) |