1 /* 2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP 26 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP 27 28 #ifdef TARGET_COMPILER_gcc 29 # include "utilities/globalDefinitions_gcc.hpp" 30 #endif 31 #ifdef TARGET_COMPILER_visCPP 32 # include "utilities/globalDefinitions_visCPP.hpp" 33 #endif 34 #ifdef TARGET_COMPILER_sparcWorks 35 # include "utilities/globalDefinitions_sparcWorks.hpp" 36 #endif 37 #ifdef TARGET_COMPILER_xlc 38 # include "utilities/globalDefinitions_xlc.hpp" 39 #endif 40 41 #ifndef NOINLINE 42 #define NOINLINE 43 #endif 44 #ifndef ALWAYSINLINE 45 #define ALWAYSINLINE inline 46 #endif 47 #ifndef PRAGMA_DIAG_PUSH 48 #define PRAGMA_DIAG_PUSH 49 #endif 50 #ifndef PRAGMA_DIAG_POP 51 #define PRAGMA_DIAG_POP 52 #endif 53 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED 54 #define PRAGMA_FORMAT_NONLITERAL_IGNORED 55 #endif 56 #ifndef PRAGMA_FORMAT_IGNORED 57 #define PRAGMA_FORMAT_IGNORED 58 #endif 59 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL 60 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL 61 #endif 62 #ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL 63 #define PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL 64 #endif 65 #ifndef ATTRIBUTE_PRINTF 66 #define ATTRIBUTE_PRINTF(fmt, vargs) 67 #endif 68 #ifndef ATTRIBUTE_SCANF 69 #define ATTRIBUTE_SCANF(fmt, vargs) 70 #endif 71 72 #include "utilities/macros.hpp" 73 74 // This file holds all globally used constants & types, class (forward) 75 // declarations and a few frequently used utility functions. 76 77 //---------------------------------------------------------------------------------------------------- 78 // Constants 79 80 const int LogBytesPerShort = 1; 81 const int LogBytesPerInt = 2; 82 #ifdef _LP64 83 const int LogBytesPerWord = 3; 84 #else 85 const int LogBytesPerWord = 2; 86 #endif 87 const int LogBytesPerLong = 3; 88 89 const int BytesPerShort = 1 << LogBytesPerShort; 90 const int BytesPerInt = 1 << LogBytesPerInt; 91 const int BytesPerWord = 1 << LogBytesPerWord; 92 const int BytesPerLong = 1 << LogBytesPerLong; 93 94 const int LogBitsPerByte = 3; 95 const int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort; 96 const int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt; 97 const int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord; 98 const int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong; 99 100 const int BitsPerByte = 1 << LogBitsPerByte; 101 const int BitsPerShort = 1 << LogBitsPerShort; 102 const int BitsPerInt = 1 << LogBitsPerInt; 103 const int BitsPerWord = 1 << LogBitsPerWord; 104 const int BitsPerLong = 1 << LogBitsPerLong; 105 106 const int WordAlignmentMask = (1 << LogBytesPerWord) - 1; 107 const int LongAlignmentMask = (1 << LogBytesPerLong) - 1; 108 109 const int WordsPerLong = 2; // Number of stack entries for longs 110 111 const int oopSize = sizeof(char*); // Full-width oop 112 extern int heapOopSize; // Oop within a java object 113 const int wordSize = sizeof(char*); 114 const int longSize = sizeof(jlong); 115 const int jintSize = sizeof(jint); 116 const int size_tSize = sizeof(size_t); 117 118 const int BytesPerOop = BytesPerWord; // Full-width oop 119 120 extern int LogBytesPerHeapOop; // Oop within a java object 121 extern int LogBitsPerHeapOop; 122 extern int BytesPerHeapOop; 123 extern int BitsPerHeapOop; 124 125 const int BitsPerJavaInteger = 32; 126 const int BitsPerJavaLong = 64; 127 const int BitsPerSize_t = size_tSize * BitsPerByte; 128 129 // Size of a char[] needed to represent a jint as a string in decimal. 130 const int jintAsStringSize = 12; 131 132 // In fact this should be 133 // log2_intptr(sizeof(class JavaThread)) - log2_intptr(64); 134 // see os::set_memory_serialize_page() 135 #ifdef _LP64 136 const int SerializePageShiftCount = 4; 137 #else 138 const int SerializePageShiftCount = 3; 139 #endif 140 141 // An opaque struct of heap-word width, so that HeapWord* can be a generic 142 // pointer into the heap. We require that object sizes be measured in 143 // units of heap words, so that that 144 // HeapWord* hw; 145 // hw += oop(hw)->foo(); 146 // works, where foo is a method (like size or scavenge) that returns the 147 // object size. 148 class HeapWord { 149 friend class VMStructs; 150 private: 151 char* i; 152 #ifndef PRODUCT 153 public: 154 char* value() { return i; } 155 #endif 156 }; 157 158 // Analogous opaque struct for metadata allocated from 159 // metaspaces. 160 class MetaWord { 161 private: 162 char* i; 163 }; 164 165 // HeapWordSize must be 2^LogHeapWordSize. 166 const int HeapWordSize = sizeof(HeapWord); 167 #ifdef _LP64 168 const int LogHeapWordSize = 3; 169 #else 170 const int LogHeapWordSize = 2; 171 #endif 172 const int HeapWordsPerLong = BytesPerLong / HeapWordSize; 173 const int LogHeapWordsPerLong = LogBytesPerLong - LogHeapWordSize; 174 175 // The larger HeapWordSize for 64bit requires larger heaps 176 // for the same application running in 64bit. See bug 4967770. 177 // The minimum alignment to a heap word size is done. Other 178 // parts of the memory system may require additional alignment 179 // and are responsible for those alignments. 180 #ifdef _LP64 181 #define ScaleForWordSize(x) align_size_down_((x) * 13 / 10, HeapWordSize) 182 #else 183 #define ScaleForWordSize(x) (x) 184 #endif 185 186 // The minimum number of native machine words necessary to contain "byte_size" 187 // bytes. 188 inline size_t heap_word_size(size_t byte_size) { 189 return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize; 190 } 191 192 //------------------------------------------- 193 // Constant for jlong (standardized by C++11) 194 195 // Build a 64bit integer constant 196 #define CONST64(x) (x ## LL) 197 #define UCONST64(x) (x ## ULL) 198 199 const jlong min_jlong = CONST64(0x8000000000000000); 200 const jlong max_jlong = CONST64(0x7fffffffffffffff); 201 202 const size_t K = 1024; 203 const size_t M = K*K; 204 const size_t G = M*K; 205 const size_t HWperKB = K / sizeof(HeapWord); 206 207 // Constants for converting from a base unit to milli-base units. For 208 // example from seconds to milliseconds and microseconds 209 210 const int MILLIUNITS = 1000; // milli units per base unit 211 const int MICROUNITS = 1000000; // micro units per base unit 212 const int NANOUNITS = 1000000000; // nano units per base unit 213 214 const jlong NANOSECS_PER_SEC = CONST64(1000000000); 215 const jint NANOSECS_PER_MILLISEC = 1000000; 216 217 inline const char* proper_unit_for_byte_size(size_t s) { 218 #ifdef _LP64 219 if (s >= 10*G) { 220 return "G"; 221 } 222 #endif 223 if (s >= 10*M) { 224 return "M"; 225 } else if (s >= 10*K) { 226 return "K"; 227 } else { 228 return "B"; 229 } 230 } 231 232 template <class T> 233 inline T byte_size_in_proper_unit(T s) { 234 #ifdef _LP64 235 if (s >= 10*G) { 236 return (T)(s/G); 237 } 238 #endif 239 if (s >= 10*M) { 240 return (T)(s/M); 241 } else if (s >= 10*K) { 242 return (T)(s/K); 243 } else { 244 return s; 245 } 246 } 247 248 inline const char* exact_unit_for_byte_size(size_t s) { 249 #ifdef _LP64 250 if (s >= G && (s % G) == 0) { 251 return "G"; 252 } 253 #endif 254 if (s >= M && (s % M) == 0) { 255 return "M"; 256 } 257 if (s >= K && (s % K) == 0) { 258 return "K"; 259 } 260 return "B"; 261 } 262 263 inline size_t byte_size_in_exact_unit(size_t s) { 264 #ifdef _LP64 265 if (s >= G && (s % G) == 0) { 266 return s / G; 267 } 268 #endif 269 if (s >= M && (s % M) == 0) { 270 return s / M; 271 } 272 if (s >= K && (s % K) == 0) { 273 return s / K; 274 } 275 return s; 276 } 277 278 //---------------------------------------------------------------------------------------------------- 279 // VM type definitions 280 281 // intx and uintx are the 'extended' int and 'extended' unsigned int types; 282 // they are 32bit wide on a 32-bit platform, and 64bit wide on a 64bit platform. 283 284 typedef intptr_t intx; 285 typedef uintptr_t uintx; 286 287 const intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1); 288 const intx max_intx = (uintx)min_intx - 1; 289 const uintx max_uintx = (uintx)-1; 290 291 // Table of values: 292 // sizeof intx 4 8 293 // min_intx 0x80000000 0x8000000000000000 294 // max_intx 0x7FFFFFFF 0x7FFFFFFFFFFFFFFF 295 // max_uintx 0xFFFFFFFF 0xFFFFFFFFFFFFFFFF 296 297 typedef unsigned int uint; NEEDS_CLEANUP 298 299 300 //---------------------------------------------------------------------------------------------------- 301 // Java type definitions 302 303 // All kinds of 'plain' byte addresses 304 typedef signed char s_char; 305 typedef unsigned char u_char; 306 typedef u_char* address; 307 typedef uintptr_t address_word; // unsigned integer which will hold a pointer 308 // except for some implementations of a C++ 309 // linkage pointer to function. Should never 310 // need one of those to be placed in this 311 // type anyway. 312 313 // Utility functions to "portably" (?) bit twiddle pointers 314 // Where portable means keep ANSI C++ compilers quiet 315 316 inline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); } 317 inline address clear_address_bits(address x, int m) { return address(intptr_t(x) & ~m); } 318 319 // Utility functions to "portably" make cast to/from function pointers. 320 321 inline address_word mask_address_bits(address x, int m) { return address_word(x) & m; } 322 inline address_word castable_address(address x) { return address_word(x) ; } 323 inline address_word castable_address(void* x) { return address_word(x) ; } 324 325 // Pointer subtraction. 326 // The idea here is to avoid ptrdiff_t, which is signed and so doesn't have 327 // the range we might need to find differences from one end of the heap 328 // to the other. 329 // A typical use might be: 330 // if (pointer_delta(end(), top()) >= size) { 331 // // enough room for an object of size 332 // ... 333 // and then additions like 334 // ... top() + size ... 335 // are safe because we know that top() is at least size below end(). 336 inline size_t pointer_delta(const volatile void* left, 337 const volatile void* right, 338 size_t element_size) { 339 return (((uintptr_t) left) - ((uintptr_t) right)) / element_size; 340 } 341 342 // A version specialized for HeapWord*'s. 343 inline size_t pointer_delta(const HeapWord* left, const HeapWord* right) { 344 return pointer_delta(left, right, sizeof(HeapWord)); 345 } 346 // A version specialized for MetaWord*'s. 347 inline size_t pointer_delta(const MetaWord* left, const MetaWord* right) { 348 return pointer_delta(left, right, sizeof(MetaWord)); 349 } 350 351 // 352 // ANSI C++ does not allow casting from one pointer type to a function pointer 353 // directly without at best a warning. This macro accomplishes it silently 354 // In every case that is present at this point the value be cast is a pointer 355 // to a C linkage function. In some case the type used for the cast reflects 356 // that linkage and a picky compiler would not complain. In other cases because 357 // there is no convenient place to place a typedef with extern C linkage (i.e 358 // a platform dependent header file) it doesn't. At this point no compiler seems 359 // picky enough to catch these instances (which are few). It is possible that 360 // using templates could fix these for all cases. This use of templates is likely 361 // so far from the middle of the road that it is likely to be problematic in 362 // many C++ compilers. 363 // 364 #define CAST_TO_FN_PTR(func_type, value) (reinterpret_cast<func_type>(value)) 365 #define CAST_FROM_FN_PTR(new_type, func_ptr) ((new_type)((address_word)(func_ptr))) 366 367 // Unsigned byte types for os and stream.hpp 368 369 // Unsigned one, two, four and eigth byte quantities used for describing 370 // the .class file format. See JVM book chapter 4. 371 372 typedef jubyte u1; 373 typedef jushort u2; 374 typedef juint u4; 375 typedef julong u8; 376 377 const jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte 378 const jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort 379 const juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint 380 const julong max_julong = (julong)-1; // 0xFF....FF largest julong 381 382 typedef jbyte s1; 383 typedef jshort s2; 384 typedef jint s4; 385 typedef jlong s8; 386 387 const jbyte min_jbyte = -(1 << 7); // smallest jbyte 388 const jbyte max_jbyte = (1 << 7) - 1; // largest jbyte 389 const jshort min_jshort = -(1 << 15); // smallest jshort 390 const jshort max_jshort = (1 << 15) - 1; // largest jshort 391 392 const jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint 393 const jint max_jint = (juint)min_jint - 1; // 0x7FFFFFFF == largest jint 394 395 //---------------------------------------------------------------------------------------------------- 396 // JVM spec restrictions 397 398 const int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134) 399 400 // Default ProtectionDomainCacheSize values 401 402 const int defaultProtectionDomainCacheSize = NOT_LP64(137) LP64_ONLY(2017); 403 404 //---------------------------------------------------------------------------------------------------- 405 // Default and minimum StringTableSize values 406 407 const int defaultStringTableSize = NOT_LP64(1009) LP64_ONLY(60013); 408 const int minimumStringTableSize = 1009; 409 410 const int defaultSymbolTableSize = 20011; 411 const int minimumSymbolTableSize = 1009; 412 413 414 //---------------------------------------------------------------------------------------------------- 415 // HotSwap - for JVMTI aka Class File Replacement and PopFrame 416 // 417 // Determines whether on-the-fly class replacement and frame popping are enabled. 418 419 #define HOTSWAP 420 421 //---------------------------------------------------------------------------------------------------- 422 // Object alignment, in units of HeapWords. 423 // 424 // Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and 425 // reference fields can be naturally aligned. 426 427 extern int MinObjAlignment; 428 extern int MinObjAlignmentInBytes; 429 extern int MinObjAlignmentInBytesMask; 430 431 extern int LogMinObjAlignment; 432 extern int LogMinObjAlignmentInBytes; 433 434 const int LogKlassAlignmentInBytes = 3; 435 const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize; 436 const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes; 437 const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize; 438 439 // Maximal size of heap where unscaled compression can be used. Also upper bound 440 // for heap placement: 4GB. 441 const uint64_t UnscaledOopHeapMax = (uint64_t(max_juint) + 1); 442 // Maximal size of heap where compressed oops can be used. Also upper bound for heap 443 // placement for zero based compression algorithm: UnscaledOopHeapMax << LogMinObjAlignmentInBytes. 444 extern uint64_t OopEncodingHeapMax; 445 446 // Maximal size of compressed class space. Above this limit compression is not possible. 447 // Also upper bound for placement of zero based class space. (Class space is further limited 448 // to be < 3G, see arguments.cpp.) 449 const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes; 450 451 // Machine dependent stuff 452 453 // The maximum size of the code cache. Can be overridden by targets. 454 #define CODE_CACHE_SIZE_LIMIT (2*G) 455 // Allow targets to reduce the default size of the code cache. 456 #define CODE_CACHE_DEFAULT_LIMIT CODE_CACHE_SIZE_LIMIT 457 458 #include CPU_HEADER(globalDefinitions) 459 460 // To assure the IRIW property on processors that are not multiple copy 461 // atomic, sync instructions must be issued between volatile reads to 462 // assure their ordering, instead of after volatile stores. 463 // (See "A Tutorial Introduction to the ARM and POWER Relaxed Memory Models" 464 // by Luc Maranget, Susmit Sarkar and Peter Sewell, INRIA/Cambridge) 465 #ifdef CPU_NOT_MULTIPLE_COPY_ATOMIC 466 const bool support_IRIW_for_not_multiple_copy_atomic_cpu = true; 467 #else 468 const bool support_IRIW_for_not_multiple_copy_atomic_cpu = false; 469 #endif 470 471 // The byte alignment to be used by Arena::Amalloc. See bugid 4169348. 472 // Note: this value must be a power of 2 473 474 #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord) 475 476 // Signed variants of alignment helpers. There are two versions of each, a macro 477 // for use in places like enum definitions that require compile-time constant 478 // expressions and a function for all other places so as to get type checking. 479 480 #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1)) 481 482 inline bool is_size_aligned(size_t size, size_t alignment) { 483 return align_size_up_(size, alignment) == size; 484 } 485 486 inline bool is_ptr_aligned(const void* ptr, size_t alignment) { 487 return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr; 488 } 489 490 inline intptr_t align_size_up(intptr_t size, intptr_t alignment) { 491 return align_size_up_(size, alignment); 492 } 493 494 #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1)) 495 496 inline intptr_t align_size_down(intptr_t size, intptr_t alignment) { 497 return align_size_down_(size, alignment); 498 } 499 500 #define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment))) 501 502 inline void* align_ptr_up(const void* ptr, size_t alignment) { 503 return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment); 504 } 505 506 inline void* align_ptr_down(void* ptr, size_t alignment) { 507 return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment); 508 } 509 510 inline volatile void* align_ptr_down(volatile void* ptr, size_t alignment) { 511 return (volatile void*)align_size_down((intptr_t)ptr, (intptr_t)alignment); 512 } 513 514 // Align metaspace objects by rounding up to natural word boundary 515 516 inline intptr_t align_metadata_size(intptr_t size) { 517 return align_size_up(size, 1); 518 } 519 520 // Align objects in the Java Heap by rounding up their size, in HeapWord units. 521 // Since the size is given in words this is somewhat of a nop, but 522 // distinguishes it from align_object_size. 523 inline intptr_t align_object_size(intptr_t size) { 524 return align_size_up(size, MinObjAlignment); 525 } 526 527 inline bool is_object_aligned(intptr_t addr) { 528 return addr == align_object_size(addr); 529 } 530 531 inline bool is_ptr_object_aligned(const void* addr) { 532 return is_ptr_aligned(addr, MinObjAlignmentInBytes); 533 } 534 535 // Pad out certain offsets to jlong alignment, in HeapWord units. 536 537 inline intptr_t align_object_offset(intptr_t offset) { 538 return align_size_up(offset, HeapWordsPerLong); 539 } 540 541 // Align down with a lower bound. If the aligning results in 0, return 'alignment'. 542 543 inline size_t align_size_down_bounded(size_t size, size_t alignment) { 544 size_t aligned_size = align_size_down_(size, alignment); 545 return aligned_size > 0 ? aligned_size : alignment; 546 } 547 548 // Clamp an address to be within a specific page 549 // 1. If addr is on the page it is returned as is 550 // 2. If addr is above the page_address the start of the *next* page will be returned 551 // 3. Otherwise, if addr is below the page_address the start of the page will be returned 552 inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) { 553 if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) { 554 // address is in the specified page, just return it as is 555 return addr; 556 } else if (addr > page_address) { 557 // address is above specified page, return start of next page 558 return (address)align_size_down(intptr_t(page_address), page_size) + page_size; 559 } else { 560 // address is below specified page, return start of page 561 return (address)align_size_down(intptr_t(page_address), page_size); 562 } 563 } 564 565 566 // The expected size in bytes of a cache line, used to pad data structures. 567 #ifndef DEFAULT_CACHE_LINE_SIZE 568 #define DEFAULT_CACHE_LINE_SIZE 64 569 #endif 570 571 572 //---------------------------------------------------------------------------------------------------- 573 // Utility macros for compilers 574 // used to silence compiler warnings 575 576 #define Unused_Variable(var) var 577 578 579 //---------------------------------------------------------------------------------------------------- 580 // Miscellaneous 581 582 // 6302670 Eliminate Hotspot __fabsf dependency 583 // All fabs() callers should call this function instead, which will implicitly 584 // convert the operand to double, avoiding a dependency on __fabsf which 585 // doesn't exist in early versions of Solaris 8. 586 inline double fabsd(double value) { 587 return fabs(value); 588 } 589 590 // Returns numerator/denominator as percentage value from 0 to 100. If denominator 591 // is zero, return 0.0. 592 template<typename T> 593 inline double percent_of(T numerator, T denominator) { 594 return denominator != 0 ? (double)numerator / denominator * 100.0 : 0.0; 595 } 596 597 //---------------------------------------------------------------------------------------------------- 598 // Special casts 599 // Cast floats into same-size integers and vice-versa w/o changing bit-pattern 600 typedef union { 601 jfloat f; 602 jint i; 603 } FloatIntConv; 604 605 typedef union { 606 jdouble d; 607 jlong l; 608 julong ul; 609 } DoubleLongConv; 610 611 inline jint jint_cast (jfloat x) { return ((FloatIntConv*)&x)->i; } 612 inline jfloat jfloat_cast (jint x) { return ((FloatIntConv*)&x)->f; } 613 614 inline jlong jlong_cast (jdouble x) { return ((DoubleLongConv*)&x)->l; } 615 inline julong julong_cast (jdouble x) { return ((DoubleLongConv*)&x)->ul; } 616 inline jdouble jdouble_cast (jlong x) { return ((DoubleLongConv*)&x)->d; } 617 618 inline jint low (jlong value) { return jint(value); } 619 inline jint high(jlong value) { return jint(value >> 32); } 620 621 // the fancy casts are a hopefully portable way 622 // to do unsigned 32 to 64 bit type conversion 623 inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32; 624 *value |= (jlong)(julong)(juint)low; } 625 626 inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff; 627 *value |= (jlong)high << 32; } 628 629 inline jlong jlong_from(jint h, jint l) { 630 jlong result = 0; // initialization to avoid warning 631 set_high(&result, h); 632 set_low(&result, l); 633 return result; 634 } 635 636 union jlong_accessor { 637 jint words[2]; 638 jlong long_value; 639 }; 640 641 void basic_types_init(); // cannot define here; uses assert 642 643 644 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java 645 enum BasicType { 646 T_BOOLEAN = 4, 647 T_CHAR = 5, 648 T_FLOAT = 6, 649 T_DOUBLE = 7, 650 T_BYTE = 8, 651 T_SHORT = 9, 652 T_INT = 10, 653 T_LONG = 11, 654 T_OBJECT = 12, 655 T_ARRAY = 13, 656 T_VOID = 14, 657 T_ADDRESS = 15, 658 T_NARROWOOP = 16, 659 T_METADATA = 17, 660 T_NARROWKLASS = 18, 661 T_CONFLICT = 19, // for stack value type with conflicting contents 662 T_ILLEGAL = 99 663 }; 664 665 inline bool is_java_primitive(BasicType t) { 666 return T_BOOLEAN <= t && t <= T_LONG; 667 } 668 669 inline bool is_subword_type(BasicType t) { 670 // these guys are processed exactly like T_INT in calling sequences: 671 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT); 672 } 673 674 inline bool is_signed_subword_type(BasicType t) { 675 return (t == T_BYTE || t == T_SHORT); 676 } 677 678 // Convert a char from a classfile signature to a BasicType 679 inline BasicType char2type(char c) { 680 switch( c ) { 681 case 'B': return T_BYTE; 682 case 'C': return T_CHAR; 683 case 'D': return T_DOUBLE; 684 case 'F': return T_FLOAT; 685 case 'I': return T_INT; 686 case 'J': return T_LONG; 687 case 'S': return T_SHORT; 688 case 'Z': return T_BOOLEAN; 689 case 'V': return T_VOID; 690 case 'L': return T_OBJECT; 691 case '[': return T_ARRAY; 692 } 693 return T_ILLEGAL; 694 } 695 696 extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar 697 inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; } 698 extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements 699 extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar 700 inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; } 701 extern BasicType name2type(const char* name); 702 703 // Auxiliary math routines 704 // least common multiple 705 extern size_t lcm(size_t a, size_t b); 706 707 708 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java 709 enum BasicTypeSize { 710 T_BOOLEAN_size = 1, 711 T_CHAR_size = 1, 712 T_FLOAT_size = 1, 713 T_DOUBLE_size = 2, 714 T_BYTE_size = 1, 715 T_SHORT_size = 1, 716 T_INT_size = 1, 717 T_LONG_size = 2, 718 T_OBJECT_size = 1, 719 T_ARRAY_size = 1, 720 T_NARROWOOP_size = 1, 721 T_NARROWKLASS_size = 1, 722 T_VOID_size = 0 723 }; 724 725 726 // maps a BasicType to its instance field storage type: 727 // all sub-word integral types are widened to T_INT 728 extern BasicType type2field[T_CONFLICT+1]; 729 extern BasicType type2wfield[T_CONFLICT+1]; 730 731 732 // size in bytes 733 enum ArrayElementSize { 734 T_BOOLEAN_aelem_bytes = 1, 735 T_CHAR_aelem_bytes = 2, 736 T_FLOAT_aelem_bytes = 4, 737 T_DOUBLE_aelem_bytes = 8, 738 T_BYTE_aelem_bytes = 1, 739 T_SHORT_aelem_bytes = 2, 740 T_INT_aelem_bytes = 4, 741 T_LONG_aelem_bytes = 8, 742 #ifdef _LP64 743 T_OBJECT_aelem_bytes = 8, 744 T_ARRAY_aelem_bytes = 8, 745 #else 746 T_OBJECT_aelem_bytes = 4, 747 T_ARRAY_aelem_bytes = 4, 748 #endif 749 T_NARROWOOP_aelem_bytes = 4, 750 T_NARROWKLASS_aelem_bytes = 4, 751 T_VOID_aelem_bytes = 0 752 }; 753 754 extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element 755 #ifdef ASSERT 756 extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts 757 #else 758 inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; } 759 #endif 760 761 762 // JavaValue serves as a container for arbitrary Java values. 763 764 class JavaValue { 765 766 public: 767 typedef union JavaCallValue { 768 jfloat f; 769 jdouble d; 770 jint i; 771 jlong l; 772 jobject h; 773 } JavaCallValue; 774 775 private: 776 BasicType _type; 777 JavaCallValue _value; 778 779 public: 780 JavaValue(BasicType t = T_ILLEGAL) { _type = t; } 781 782 JavaValue(jfloat value) { 783 _type = T_FLOAT; 784 _value.f = value; 785 } 786 787 JavaValue(jdouble value) { 788 _type = T_DOUBLE; 789 _value.d = value; 790 } 791 792 jfloat get_jfloat() const { return _value.f; } 793 jdouble get_jdouble() const { return _value.d; } 794 jint get_jint() const { return _value.i; } 795 jlong get_jlong() const { return _value.l; } 796 jobject get_jobject() const { return _value.h; } 797 JavaCallValue* get_value_addr() { return &_value; } 798 BasicType get_type() const { return _type; } 799 800 void set_jfloat(jfloat f) { _value.f = f;} 801 void set_jdouble(jdouble d) { _value.d = d;} 802 void set_jint(jint i) { _value.i = i;} 803 void set_jlong(jlong l) { _value.l = l;} 804 void set_jobject(jobject h) { _value.h = h;} 805 void set_type(BasicType t) { _type = t; } 806 807 jboolean get_jboolean() const { return (jboolean) (_value.i);} 808 jbyte get_jbyte() const { return (jbyte) (_value.i);} 809 jchar get_jchar() const { return (jchar) (_value.i);} 810 jshort get_jshort() const { return (jshort) (_value.i);} 811 812 }; 813 814 815 #define STACK_BIAS 0 816 // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff 817 // in order to extend the reach of the stack pointer. 818 #if defined(SPARC) && defined(_LP64) 819 #undef STACK_BIAS 820 #define STACK_BIAS 0x7ff 821 #endif 822 823 824 // TosState describes the top-of-stack state before and after the execution of 825 // a bytecode or method. The top-of-stack value may be cached in one or more CPU 826 // registers. The TosState corresponds to the 'machine representation' of this cached 827 // value. There's 4 states corresponding to the JAVA types int, long, float & double 828 // as well as a 5th state in case the top-of-stack value is actually on the top 829 // of stack (in memory) and thus not cached. The atos state corresponds to the itos 830 // state when it comes to machine representation but is used separately for (oop) 831 // type specific operations (e.g. verification code). 832 833 enum TosState { // describes the tos cache contents 834 btos = 0, // byte, bool tos cached 835 ztos = 1, // byte, bool tos cached 836 ctos = 2, // char tos cached 837 stos = 3, // short tos cached 838 itos = 4, // int tos cached 839 ltos = 5, // long tos cached 840 ftos = 6, // float tos cached 841 dtos = 7, // double tos cached 842 atos = 8, // object cached 843 vtos = 9, // tos not cached 844 number_of_states, 845 ilgl // illegal state: should not occur 846 }; 847 848 849 inline TosState as_TosState(BasicType type) { 850 switch (type) { 851 case T_BYTE : return btos; 852 case T_BOOLEAN: return ztos; 853 case T_CHAR : return ctos; 854 case T_SHORT : return stos; 855 case T_INT : return itos; 856 case T_LONG : return ltos; 857 case T_FLOAT : return ftos; 858 case T_DOUBLE : return dtos; 859 case T_VOID : return vtos; 860 case T_ARRAY : // fall through 861 case T_OBJECT : return atos; 862 } 863 return ilgl; 864 } 865 866 inline BasicType as_BasicType(TosState state) { 867 switch (state) { 868 case btos : return T_BYTE; 869 case ztos : return T_BOOLEAN; 870 case ctos : return T_CHAR; 871 case stos : return T_SHORT; 872 case itos : return T_INT; 873 case ltos : return T_LONG; 874 case ftos : return T_FLOAT; 875 case dtos : return T_DOUBLE; 876 case atos : return T_OBJECT; 877 case vtos : return T_VOID; 878 } 879 return T_ILLEGAL; 880 } 881 882 883 // Helper function to convert BasicType info into TosState 884 // Note: Cannot define here as it uses global constant at the time being. 885 TosState as_TosState(BasicType type); 886 887 888 // JavaThreadState keeps track of which part of the code a thread is executing in. This 889 // information is needed by the safepoint code. 890 // 891 // There are 4 essential states: 892 // 893 // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code) 894 // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles 895 // _thread_in_vm : Executing in the vm 896 // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub) 897 // 898 // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in 899 // a transition from one state to another. These extra states makes it possible for the safepoint code to 900 // handle certain thread_states without having to suspend the thread - making the safepoint code faster. 901 // 902 // Given a state, the xxxx_trans state can always be found by adding 1. 903 // 904 enum JavaThreadState { 905 _thread_uninitialized = 0, // should never happen (missing initialization) 906 _thread_new = 2, // just starting up, i.e., in process of being initialized 907 _thread_new_trans = 3, // corresponding transition state (not used, included for completness) 908 _thread_in_native = 4, // running in native code 909 _thread_in_native_trans = 5, // corresponding transition state 910 _thread_in_vm = 6, // running in VM 911 _thread_in_vm_trans = 7, // corresponding transition state 912 _thread_in_Java = 8, // running in Java or in stub code 913 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness) 914 _thread_blocked = 10, // blocked in vm 915 _thread_blocked_trans = 11, // corresponding transition state 916 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation 917 }; 918 919 920 921 //---------------------------------------------------------------------------------------------------- 922 // 'Forward' declarations of frequently used classes 923 // (in order to reduce interface dependencies & reduce 924 // number of unnecessary compilations after changes) 925 926 class ClassFileStream; 927 928 class Event; 929 930 class Thread; 931 class VMThread; 932 class JavaThread; 933 class Threads; 934 935 class VM_Operation; 936 class VMOperationQueue; 937 938 class CodeBlob; 939 class CompiledMethod; 940 class nmethod; 941 class RuntimeBlob; 942 class OSRAdapter; 943 class I2CAdapter; 944 class C2IAdapter; 945 class CompiledIC; 946 class relocInfo; 947 class ScopeDesc; 948 class PcDesc; 949 950 class Recompiler; 951 class Recompilee; 952 class RecompilationPolicy; 953 class RFrame; 954 class CompiledRFrame; 955 class InterpretedRFrame; 956 957 class frame; 958 959 class vframe; 960 class javaVFrame; 961 class interpretedVFrame; 962 class compiledVFrame; 963 class deoptimizedVFrame; 964 class externalVFrame; 965 class entryVFrame; 966 967 class RegisterMap; 968 969 class Mutex; 970 class Monitor; 971 class BasicLock; 972 class BasicObjectLock; 973 974 class PeriodicTask; 975 976 class JavaCallWrapper; 977 978 class oopDesc; 979 class metaDataOopDesc; 980 981 class NativeCall; 982 983 class zone; 984 985 class StubQueue; 986 987 class outputStream; 988 989 class ResourceArea; 990 991 class DebugInformationRecorder; 992 class ScopeValue; 993 class CompressedStream; 994 class DebugInfoReadStream; 995 class DebugInfoWriteStream; 996 class LocationValue; 997 class ConstantValue; 998 class IllegalValue; 999 1000 class PrivilegedElement; 1001 class MonitorArray; 1002 1003 class MonitorInfo; 1004 1005 class OffsetClosure; 1006 class OopMapCache; 1007 class InterpreterOopMap; 1008 class OopMapCacheEntry; 1009 class OSThread; 1010 1011 typedef int (*OSThreadStartFunc)(void*); 1012 1013 class Space; 1014 1015 class JavaValue; 1016 class methodHandle; 1017 class JavaCallArguments; 1018 1019 // Basic support for errors (general debug facilities not defined at this point fo the include phase) 1020 1021 extern void basic_fatal(const char* msg); 1022 1023 1024 //---------------------------------------------------------------------------------------------------- 1025 // Special constants for debugging 1026 1027 const jint badInt = -3; // generic "bad int" value 1028 const long badAddressVal = -2; // generic "bad address" value 1029 const long badOopVal = -1; // generic "bad oop" value 1030 const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC 1031 const int badHandleValue = 0xBC; // value used to zap vm handle area 1032 const int badResourceValue = 0xAB; // value used to zap resource area 1033 const int freeBlockPad = 0xBA; // value used to pad freed blocks. 1034 const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks. 1035 const juint uninitMetaWordVal= 0xf7f7f7f7; // value used to zap newly allocated metachunk 1036 const intptr_t badJNIHandleVal = (intptr_t) UCONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area 1037 const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC 1038 const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC 1039 const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation 1040 const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation 1041 1042 1043 // (These must be implemented as #defines because C++ compilers are 1044 // not obligated to inline non-integral constants!) 1045 #define badAddress ((address)::badAddressVal) 1046 #define badOop (cast_to_oop(::badOopVal)) 1047 #define badHeapWord (::badHeapWordVal) 1048 #define badJNIHandle (cast_to_oop(::badJNIHandleVal)) 1049 1050 // Default TaskQueue size is 16K (32-bit) or 128K (64-bit) 1051 #define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17)) 1052 1053 //---------------------------------------------------------------------------------------------------- 1054 // Utility functions for bitfield manipulations 1055 1056 const intptr_t AllBits = ~0; // all bits set in a word 1057 const intptr_t NoBits = 0; // no bits set in a word 1058 const jlong NoLongBits = 0; // no bits set in a long 1059 const intptr_t OneBit = 1; // only right_most bit set in a word 1060 1061 // get a word with the n.th or the right-most or left-most n bits set 1062 // (note: #define used only so that they can be used in enum constant definitions) 1063 #define nth_bit(n) (((n) >= BitsPerWord) ? 0 : (OneBit << (n))) 1064 #define right_n_bits(n) (nth_bit(n) - 1) 1065 #define left_n_bits(n) (right_n_bits(n) << (((n) >= BitsPerWord) ? 0 : (BitsPerWord - (n)))) 1066 1067 // bit-operations using a mask m 1068 inline void set_bits (intptr_t& x, intptr_t m) { x |= m; } 1069 inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; } 1070 inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; } 1071 inline jlong mask_long_bits (jlong x, jlong m) { return x & m; } 1072 inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; } 1073 1074 // bit-operations using the n.th bit 1075 inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); } 1076 inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); } 1077 inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; } 1078 1079 // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!) 1080 inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) { 1081 return mask_bits(x >> start_bit_no, right_n_bits(field_length)); 1082 } 1083 1084 1085 //---------------------------------------------------------------------------------------------------- 1086 // Utility functions for integers 1087 1088 // Avoid use of global min/max macros which may cause unwanted double 1089 // evaluation of arguments. 1090 #ifdef max 1091 #undef max 1092 #endif 1093 1094 #ifdef min 1095 #undef min 1096 #endif 1097 1098 // The following defines serve the purpose of preventing use of accidentally 1099 // included min max macros from compiling, while continuing to allow innocent 1100 // min and max identifiers in the code to compile as intended. 1101 #define max max 1102 #define min min 1103 1104 // It is necessary to use templates here. Having normal overloaded 1105 // functions does not work because it is necessary to provide both 32- 1106 // and 64-bit overloaded functions, which does not work, and having 1107 // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L) 1108 // will be even more error-prone than macros. 1109 template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; } 1110 template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; } 1111 template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); } 1112 template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); } 1113 template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); } 1114 template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); } 1115 1116 template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; } 1117 1118 // true if x is a power of 2, false otherwise 1119 inline bool is_power_of_2(intptr_t x) { 1120 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits)); 1121 } 1122 1123 // long version of is_power_of_2 1124 inline bool is_power_of_2_long(jlong x) { 1125 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits)); 1126 } 1127 1128 // Returns largest i such that 2^i <= x. 1129 // If x < 0, the function returns 31 on a 32-bit machine and 63 on a 64-bit machine. 1130 // If x == 0, the function returns -1. 1131 inline int log2_intptr(intptr_t x) { 1132 int i = -1; 1133 uintptr_t p = 1; 1134 while (p != 0 && p <= (uintptr_t)x) { 1135 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) 1136 i++; p *= 2; 1137 } 1138 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) 1139 // If p = 0, overflow has occurred and i = 31 or i = 63 (depending on the machine word size). 1140 return i; 1141 } 1142 1143 //* largest i such that 2^i <= x 1144 // A negative value of 'x' will return '63' 1145 inline int log2_long(jlong x) { 1146 int i = -1; 1147 julong p = 1; 1148 while (p != 0 && p <= (julong)x) { 1149 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) 1150 i++; p *= 2; 1151 } 1152 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) 1153 // (if p = 0 then overflow occurred and i = 63) 1154 return i; 1155 } 1156 1157 //* the argument must be exactly a power of 2 1158 inline int exact_log2(intptr_t x) { 1159 #ifdef ASSERT 1160 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2"); 1161 #endif 1162 return log2_intptr(x); 1163 } 1164 1165 //* the argument must be exactly a power of 2 1166 inline int exact_log2_long(jlong x) { 1167 #ifdef ASSERT 1168 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2"); 1169 #endif 1170 return log2_long(x); 1171 } 1172 1173 1174 // returns integer round-up to the nearest multiple of s (s must be a power of two) 1175 inline intptr_t round_to(intptr_t x, uintx s) { 1176 #ifdef ASSERT 1177 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); 1178 #endif 1179 const uintx m = s - 1; 1180 return mask_bits(x + m, ~m); 1181 } 1182 1183 // returns integer round-down to the nearest multiple of s (s must be a power of two) 1184 inline intptr_t round_down(intptr_t x, uintx s) { 1185 #ifdef ASSERT 1186 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); 1187 #endif 1188 const uintx m = s - 1; 1189 return mask_bits(x, ~m); 1190 } 1191 1192 1193 inline bool is_odd (intx x) { return x & 1; } 1194 inline bool is_even(intx x) { return !is_odd(x); } 1195 1196 // "to" should be greater than "from." 1197 inline intx byte_size(void* from, void* to) { 1198 return (address)to - (address)from; 1199 } 1200 1201 //---------------------------------------------------------------------------------------------------- 1202 // Avoid non-portable casts with these routines (DEPRECATED) 1203 1204 // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE 1205 // Bytes is optimized machine-specifically and may be much faster then the portable routines below. 1206 1207 // Given sequence of four bytes, build into a 32-bit word 1208 // following the conventions used in class files. 1209 // On the 386, this could be realized with a simple address cast. 1210 // 1211 1212 // This routine takes eight bytes: 1213 inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1214 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 )) 1215 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 )) 1216 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 )) 1217 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 )) 1218 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 )) 1219 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 )) 1220 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 )) 1221 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 )); 1222 } 1223 1224 // This routine takes four bytes: 1225 inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { 1226 return (( u4(c1) << 24 ) & 0xff000000) 1227 | (( u4(c2) << 16 ) & 0x00ff0000) 1228 | (( u4(c3) << 8 ) & 0x0000ff00) 1229 | (( u4(c4) << 0 ) & 0x000000ff); 1230 } 1231 1232 // And this one works if the four bytes are contiguous in memory: 1233 inline u4 build_u4_from( u1* p ) { 1234 return build_u4_from( p[0], p[1], p[2], p[3] ); 1235 } 1236 1237 // Ditto for two-byte ints: 1238 inline u2 build_u2_from( u1 c1, u1 c2 ) { 1239 return u2((( u2(c1) << 8 ) & 0xff00) 1240 | (( u2(c2) << 0 ) & 0x00ff)); 1241 } 1242 1243 // And this one works if the two bytes are contiguous in memory: 1244 inline u2 build_u2_from( u1* p ) { 1245 return build_u2_from( p[0], p[1] ); 1246 } 1247 1248 // Ditto for floats: 1249 inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { 1250 u4 u = build_u4_from( c1, c2, c3, c4 ); 1251 return *(jfloat*)&u; 1252 } 1253 1254 inline jfloat build_float_from( u1* p ) { 1255 u4 u = build_u4_from( p ); 1256 return *(jfloat*)&u; 1257 } 1258 1259 1260 // now (64-bit) longs 1261 1262 inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1263 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 )) 1264 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 )) 1265 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 )) 1266 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 )) 1267 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 )) 1268 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 )) 1269 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 )) 1270 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 )); 1271 } 1272 1273 inline jlong build_long_from( u1* p ) { 1274 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] ); 1275 } 1276 1277 1278 // Doubles, too! 1279 inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1280 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 ); 1281 return *(jdouble*)&u; 1282 } 1283 1284 inline jdouble build_double_from( u1* p ) { 1285 jlong u = build_long_from( p ); 1286 return *(jdouble*)&u; 1287 } 1288 1289 1290 // Portable routines to go the other way: 1291 1292 inline void explode_short_to( u2 x, u1& c1, u1& c2 ) { 1293 c1 = u1(x >> 8); 1294 c2 = u1(x); 1295 } 1296 1297 inline void explode_short_to( u2 x, u1* p ) { 1298 explode_short_to( x, p[0], p[1]); 1299 } 1300 1301 inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) { 1302 c1 = u1(x >> 24); 1303 c2 = u1(x >> 16); 1304 c3 = u1(x >> 8); 1305 c4 = u1(x); 1306 } 1307 1308 inline void explode_int_to( u4 x, u1* p ) { 1309 explode_int_to( x, p[0], p[1], p[2], p[3]); 1310 } 1311 1312 1313 // Pack and extract shorts to/from ints: 1314 1315 inline int extract_low_short_from_int(jint x) { 1316 return x & 0xffff; 1317 } 1318 1319 inline int extract_high_short_from_int(jint x) { 1320 return (x >> 16) & 0xffff; 1321 } 1322 1323 inline int build_int_from_shorts( jushort low, jushort high ) { 1324 return ((int)((unsigned int)high << 16) | (unsigned int)low); 1325 } 1326 1327 // Convert pointer to intptr_t, for use in printing pointers. 1328 inline intptr_t p2i(const void * p) { 1329 return (intptr_t) p; 1330 } 1331 1332 // swap a & b 1333 template<class T> static void swap(T& a, T& b) { 1334 T tmp = a; 1335 a = b; 1336 b = tmp; 1337 } 1338 1339 // Printf-style formatters for fixed- and variable-width types as pointers and 1340 // integers. These are derived from the definitions in inttypes.h. If the platform 1341 // doesn't provide appropriate definitions, they should be provided in 1342 // the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp) 1343 1344 #define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false") 1345 1346 // Format 32-bit quantities. 1347 #define INT32_FORMAT "%" PRId32 1348 #define UINT32_FORMAT "%" PRIu32 1349 #define INT32_FORMAT_W(width) "%" #width PRId32 1350 #define UINT32_FORMAT_W(width) "%" #width PRIu32 1351 1352 #define PTR32_FORMAT "0x%08" PRIx32 1353 #define PTR32_FORMAT_W(width) "0x%" #width PRIx32 1354 1355 // Format 64-bit quantities. 1356 #define INT64_FORMAT "%" PRId64 1357 #define UINT64_FORMAT "%" PRIu64 1358 #define UINT64_FORMAT_X "%" PRIx64 1359 #define INT64_FORMAT_W(width) "%" #width PRId64 1360 #define UINT64_FORMAT_W(width) "%" #width PRIu64 1361 1362 #define PTR64_FORMAT "0x%016" PRIx64 1363 1364 // Format jlong, if necessary 1365 #ifndef JLONG_FORMAT 1366 #define JLONG_FORMAT INT64_FORMAT 1367 #endif 1368 #ifndef JULONG_FORMAT 1369 #define JULONG_FORMAT UINT64_FORMAT 1370 #endif 1371 #ifndef JULONG_FORMAT_X 1372 #define JULONG_FORMAT_X UINT64_FORMAT_X 1373 #endif 1374 1375 // Format pointers which change size between 32- and 64-bit. 1376 #ifdef _LP64 1377 #define INTPTR_FORMAT "0x%016" PRIxPTR 1378 #define PTR_FORMAT "0x%016" PRIxPTR 1379 #else // !_LP64 1380 #define INTPTR_FORMAT "0x%08" PRIxPTR 1381 #define PTR_FORMAT "0x%08" PRIxPTR 1382 #endif // _LP64 1383 1384 #define INTPTR_FORMAT_W(width) "%" #width PRIxPTR 1385 1386 #define SSIZE_FORMAT "%" PRIdPTR 1387 #define SIZE_FORMAT "%" PRIuPTR 1388 #define SIZE_FORMAT_HEX "0x%" PRIxPTR 1389 #define SSIZE_FORMAT_W(width) "%" #width PRIdPTR 1390 #define SIZE_FORMAT_W(width) "%" #width PRIuPTR 1391 #define SIZE_FORMAT_HEX_W(width) "0x%" #width PRIxPTR 1392 1393 #define INTX_FORMAT "%" PRIdPTR 1394 #define UINTX_FORMAT "%" PRIuPTR 1395 #define INTX_FORMAT_W(width) "%" #width PRIdPTR 1396 #define UINTX_FORMAT_W(width) "%" #width PRIuPTR 1397 1398 1399 #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0])) 1400 1401 //---------------------------------------------------------------------------------------------------- 1402 // Sum and product which can never overflow: they wrap, just like the 1403 // Java operations. Note that we don't intend these to be used for 1404 // general-purpose arithmetic: their purpose is to emulate Java 1405 // operations. 1406 1407 // The goal of this code to avoid undefined or implementation-defined 1408 // behavior. The use of an lvalue to reference cast is explicitly 1409 // permitted by Lvalues and rvalues [basic.lval]. [Section 3.10 Para 1410 // 15 in C++03] 1411 #define JAVA_INTEGER_OP(OP, NAME, TYPE, UNSIGNED_TYPE) \ 1412 inline TYPE NAME (TYPE in1, TYPE in2) { \ 1413 UNSIGNED_TYPE ures = static_cast<UNSIGNED_TYPE>(in1); \ 1414 ures OP ## = static_cast<UNSIGNED_TYPE>(in2); \ 1415 return reinterpret_cast<TYPE&>(ures); \ 1416 } 1417 1418 JAVA_INTEGER_OP(+, java_add, jint, juint) 1419 JAVA_INTEGER_OP(-, java_subtract, jint, juint) 1420 JAVA_INTEGER_OP(*, java_multiply, jint, juint) 1421 JAVA_INTEGER_OP(+, java_add, jlong, julong) 1422 JAVA_INTEGER_OP(-, java_subtract, jlong, julong) 1423 JAVA_INTEGER_OP(*, java_multiply, jlong, julong) 1424 1425 #undef JAVA_INTEGER_OP 1426 1427 // Dereference vptr 1428 // All C++ compilers that we know of have the vtbl pointer in the first 1429 // word. If there are exceptions, this function needs to be made compiler 1430 // specific. 1431 static inline void* dereference_vptr(const void* addr) { 1432 return *(void**)addr; 1433 } 1434 1435 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP