1 /* 2 * Copyright (c) 1997, 2013, 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 #ifndef __STDC_FORMAT_MACROS 29 #define __STDC_FORMAT_MACROS 30 #endif 31 32 #ifdef TARGET_COMPILER_gcc 33 # include "utilities/globalDefinitions_gcc.hpp" 34 #endif 35 #ifdef TARGET_COMPILER_visCPP 36 # include "utilities/globalDefinitions_visCPP.hpp" 37 #endif 38 #ifdef TARGET_COMPILER_sparcWorks 39 # include "utilities/globalDefinitions_sparcWorks.hpp" 40 #endif 41 42 #include "utilities/macros.hpp" 43 44 // This file holds all globally used constants & types, class (forward) 45 // declarations and a few frequently used utility functions. 46 47 //---------------------------------------------------------------------------------------------------- 48 // Constants 49 50 const int LogBytesPerShort = 1; 51 const int LogBytesPerInt = 2; 52 #ifdef _LP64 53 const int LogBytesPerWord = 3; 54 #else 55 const int LogBytesPerWord = 2; 56 #endif 57 const int LogBytesPerLong = 3; 58 59 const int BytesPerShort = 1 << LogBytesPerShort; 60 const int BytesPerInt = 1 << LogBytesPerInt; 61 const int BytesPerWord = 1 << LogBytesPerWord; 62 const int BytesPerLong = 1 << LogBytesPerLong; 63 64 const int LogBitsPerByte = 3; 65 const int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort; 66 const int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt; 67 const int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord; 68 const int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong; 69 70 const int BitsPerByte = 1 << LogBitsPerByte; 71 const int BitsPerShort = 1 << LogBitsPerShort; 72 const int BitsPerInt = 1 << LogBitsPerInt; 73 const int BitsPerWord = 1 << LogBitsPerWord; 74 const int BitsPerLong = 1 << LogBitsPerLong; 75 76 const int WordAlignmentMask = (1 << LogBytesPerWord) - 1; 77 const int LongAlignmentMask = (1 << LogBytesPerLong) - 1; 78 79 const int WordsPerLong = 2; // Number of stack entries for longs 80 81 const int oopSize = sizeof(char*); // Full-width oop 82 extern int heapOopSize; // Oop within a java object 83 const int wordSize = sizeof(char*); 84 const int longSize = sizeof(jlong); 85 const int jintSize = sizeof(jint); 86 const int size_tSize = sizeof(size_t); 87 88 const int BytesPerOop = BytesPerWord; // Full-width oop 89 90 extern int LogBytesPerHeapOop; // Oop within a java object 91 extern int LogBitsPerHeapOop; 92 extern int BytesPerHeapOop; 93 extern int BitsPerHeapOop; 94 95 // Oop encoding heap max 96 extern uint64_t OopEncodingHeapMax; 97 98 const int BitsPerJavaInteger = 32; 99 const int BitsPerJavaLong = 64; 100 const int BitsPerSize_t = size_tSize * BitsPerByte; 101 102 // Size of a char[] needed to represent a jint as a string in decimal. 103 const int jintAsStringSize = 12; 104 105 // In fact this should be 106 // log2_intptr(sizeof(class JavaThread)) - log2_intptr(64); 107 // see os::set_memory_serialize_page() 108 #ifdef _LP64 109 const int SerializePageShiftCount = 4; 110 #else 111 const int SerializePageShiftCount = 3; 112 #endif 113 114 // An opaque struct of heap-word width, so that HeapWord* can be a generic 115 // pointer into the heap. We require that object sizes be measured in 116 // units of heap words, so that that 117 // HeapWord* hw; 118 // hw += oop(hw)->foo(); 119 // works, where foo is a method (like size or scavenge) that returns the 120 // object size. 121 class HeapWord { 122 friend class VMStructs; 123 private: 124 char* i; 125 #ifndef PRODUCT 126 public: 127 char* value() { return i; } 128 #endif 129 }; 130 131 // Analogous opaque struct for metadata allocated from 132 // metaspaces. 133 class MetaWord { 134 friend class VMStructs; 135 private: 136 char* i; 137 }; 138 139 // HeapWordSize must be 2^LogHeapWordSize. 140 const int HeapWordSize = sizeof(HeapWord); 141 #ifdef _LP64 142 const int LogHeapWordSize = 3; 143 #else 144 const int LogHeapWordSize = 2; 145 #endif 146 const int HeapWordsPerLong = BytesPerLong / HeapWordSize; 147 const int LogHeapWordsPerLong = LogBytesPerLong - LogHeapWordSize; 148 149 // The larger HeapWordSize for 64bit requires larger heaps 150 // for the same application running in 64bit. See bug 4967770. 151 // The minimum alignment to a heap word size is done. Other 152 // parts of the memory system may require additional alignment 153 // and are responsible for those alignments. 154 #ifdef _LP64 155 #define ScaleForWordSize(x) align_size_down_((x) * 13 / 10, HeapWordSize) 156 #else 157 #define ScaleForWordSize(x) (x) 158 #endif 159 160 // The minimum number of native machine words necessary to contain "byte_size" 161 // bytes. 162 inline size_t heap_word_size(size_t byte_size) { 163 return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize; 164 } 165 166 167 const size_t K = 1024; 168 const size_t M = K*K; 169 const size_t G = M*K; 170 const size_t HWperKB = K / sizeof(HeapWord); 171 172 const jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint 173 const jint max_jint = (juint)min_jint - 1; // 0x7FFFFFFF == largest jint 174 175 // Constants for converting from a base unit to milli-base units. For 176 // example from seconds to milliseconds and microseconds 177 178 const int MILLIUNITS = 1000; // milli units per base unit 179 const int MICROUNITS = 1000000; // micro units per base unit 180 const int NANOUNITS = 1000000000; // nano units per base unit 181 182 const jlong NANOSECS_PER_SEC = CONST64(1000000000); 183 const jint NANOSECS_PER_MILLISEC = 1000000; 184 185 inline const char* proper_unit_for_byte_size(size_t s) { 186 #ifdef _LP64 187 if (s >= 10*G) { 188 return "G"; 189 } 190 #endif 191 if (s >= 10*M) { 192 return "M"; 193 } else if (s >= 10*K) { 194 return "K"; 195 } else { 196 return "B"; 197 } 198 } 199 200 template <class T> 201 inline T byte_size_in_proper_unit(T s) { 202 #ifdef _LP64 203 if (s >= 10*G) { 204 return (T)(s/G); 205 } 206 #endif 207 if (s >= 10*M) { 208 return (T)(s/M); 209 } else if (s >= 10*K) { 210 return (T)(s/K); 211 } else { 212 return s; 213 } 214 } 215 216 //---------------------------------------------------------------------------------------------------- 217 // VM type definitions 218 219 // intx and uintx are the 'extended' int and 'extended' unsigned int types; 220 // they are 32bit wide on a 32-bit platform, and 64bit wide on a 64bit platform. 221 222 typedef intptr_t intx; 223 typedef uintptr_t uintx; 224 225 const intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1); 226 const intx max_intx = (uintx)min_intx - 1; 227 const uintx max_uintx = (uintx)-1; 228 229 // Table of values: 230 // sizeof intx 4 8 231 // min_intx 0x80000000 0x8000000000000000 232 // max_intx 0x7FFFFFFF 0x7FFFFFFFFFFFFFFF 233 // max_uintx 0xFFFFFFFF 0xFFFFFFFFFFFFFFFF 234 235 typedef unsigned int uint; NEEDS_CLEANUP 236 237 238 //---------------------------------------------------------------------------------------------------- 239 // Java type definitions 240 241 // All kinds of 'plain' byte addresses 242 typedef signed char s_char; 243 typedef unsigned char u_char; 244 typedef u_char* address; 245 typedef uintptr_t address_word; // unsigned integer which will hold a pointer 246 // except for some implementations of a C++ 247 // linkage pointer to function. Should never 248 // need one of those to be placed in this 249 // type anyway. 250 251 // Utility functions to "portably" (?) bit twiddle pointers 252 // Where portable means keep ANSI C++ compilers quiet 253 254 inline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); } 255 inline address clear_address_bits(address x, int m) { return address(intptr_t(x) & ~m); } 256 257 // Utility functions to "portably" make cast to/from function pointers. 258 259 inline address_word mask_address_bits(address x, int m) { return address_word(x) & m; } 260 inline address_word castable_address(address x) { return address_word(x) ; } 261 inline address_word castable_address(void* x) { return address_word(x) ; } 262 263 // Pointer subtraction. 264 // The idea here is to avoid ptrdiff_t, which is signed and so doesn't have 265 // the range we might need to find differences from one end of the heap 266 // to the other. 267 // A typical use might be: 268 // if (pointer_delta(end(), top()) >= size) { 269 // // enough room for an object of size 270 // ... 271 // and then additions like 272 // ... top() + size ... 273 // are safe because we know that top() is at least size below end(). 274 inline size_t pointer_delta(const void* left, 275 const void* right, 276 size_t element_size) { 277 return (((uintptr_t) left) - ((uintptr_t) right)) / element_size; 278 } 279 // A version specialized for HeapWord*'s. 280 inline size_t pointer_delta(const HeapWord* left, const HeapWord* right) { 281 return pointer_delta(left, right, sizeof(HeapWord)); 282 } 283 // A version specialized for MetaWord*'s. 284 inline size_t pointer_delta(const MetaWord* left, const MetaWord* right) { 285 return pointer_delta(left, right, sizeof(MetaWord)); 286 } 287 288 // 289 // ANSI C++ does not allow casting from one pointer type to a function pointer 290 // directly without at best a warning. This macro accomplishes it silently 291 // In every case that is present at this point the value be cast is a pointer 292 // to a C linkage function. In somecase the type used for the cast reflects 293 // that linkage and a picky compiler would not complain. In other cases because 294 // there is no convenient place to place a typedef with extern C linkage (i.e 295 // a platform dependent header file) it doesn't. At this point no compiler seems 296 // picky enough to catch these instances (which are few). It is possible that 297 // using templates could fix these for all cases. This use of templates is likely 298 // so far from the middle of the road that it is likely to be problematic in 299 // many C++ compilers. 300 // 301 #define CAST_TO_FN_PTR(func_type, value) ((func_type)(castable_address(value))) 302 #define CAST_FROM_FN_PTR(new_type, func_ptr) ((new_type)((address_word)(func_ptr))) 303 304 // Unsigned byte types for os and stream.hpp 305 306 // Unsigned one, two, four and eigth byte quantities used for describing 307 // the .class file format. See JVM book chapter 4. 308 309 typedef jubyte u1; 310 typedef jushort u2; 311 typedef juint u4; 312 typedef julong u8; 313 314 const jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte 315 const jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort 316 const juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint 317 const julong max_julong = (julong)-1; // 0xFF....FF largest julong 318 319 typedef jbyte s1; 320 typedef jshort s2; 321 typedef jint s4; 322 typedef jlong s8; 323 324 //---------------------------------------------------------------------------------------------------- 325 // JVM spec restrictions 326 327 const int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134) 328 329 330 //---------------------------------------------------------------------------------------------------- 331 // Default and minimum StringTableSize values 332 333 const int defaultStringTableSize = NOT_LP64(1009) LP64_ONLY(60013); 334 const int minimumStringTableSize=1009; 335 336 337 //---------------------------------------------------------------------------------------------------- 338 // HotSwap - for JVMTI aka Class File Replacement and PopFrame 339 // 340 // Determines whether on-the-fly class replacement and frame popping are enabled. 341 342 #define HOTSWAP 343 344 //---------------------------------------------------------------------------------------------------- 345 // Object alignment, in units of HeapWords. 346 // 347 // Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and 348 // reference fields can be naturally aligned. 349 350 extern int MinObjAlignment; 351 extern int MinObjAlignmentInBytes; 352 extern int MinObjAlignmentInBytesMask; 353 354 extern int LogMinObjAlignment; 355 extern int LogMinObjAlignmentInBytes; 356 357 const int LogKlassAlignmentInBytes = 3; 358 const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize; 359 const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes; 360 const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize; 361 362 // Klass encoding metaspace max size 363 const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes; 364 365 const jlong CompressedKlassPointersBase = NOT_LP64(0) LP64_ONLY(CONST64(0x800000000)); // 32*G 366 367 // Machine dependent stuff 368 369 #ifdef TARGET_ARCH_x86 370 # include "globalDefinitions_x86.hpp" 371 #endif 372 #ifdef TARGET_ARCH_sparc 373 # include "globalDefinitions_sparc.hpp" 374 #endif 375 #ifdef TARGET_ARCH_zero 376 # include "globalDefinitions_zero.hpp" 377 #endif 378 #ifdef TARGET_ARCH_arm 379 # include "globalDefinitions_arm.hpp" 380 #endif 381 #ifdef TARGET_ARCH_ppc 382 # include "globalDefinitions_ppc.hpp" 383 #endif 384 385 /* 386 * If a platform does not support native stack walking 387 * the platform specific globalDefinitions (above) 388 * can set PLATFORM_NATIVE_STACK_WALKING_SUPPORTED to 0 389 */ 390 #ifndef PLATFORM_NATIVE_STACK_WALKING_SUPPORTED 391 #define PLATFORM_NATIVE_STACK_WALKING_SUPPORTED 1 392 #endif 393 394 // The byte alignment to be used by Arena::Amalloc. See bugid 4169348. 395 // Note: this value must be a power of 2 396 397 #define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord) 398 399 // Signed variants of alignment helpers. There are two versions of each, a macro 400 // for use in places like enum definitions that require compile-time constant 401 // expressions and a function for all other places so as to get type checking. 402 403 #define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1)) 404 405 inline bool is_size_aligned(size_t size, size_t alignment) { 406 return align_size_up_(size, alignment) == size; 407 } 408 409 inline bool is_ptr_aligned(void* ptr, size_t alignment) { 410 return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr; 411 } 412 413 inline intptr_t align_size_up(intptr_t size, intptr_t alignment) { 414 return align_size_up_(size, alignment); 415 } 416 417 #define align_size_down_(size, alignment) ((size) & ~((alignment) - 1)) 418 419 inline intptr_t align_size_down(intptr_t size, intptr_t alignment) { 420 return align_size_down_(size, alignment); 421 } 422 423 #define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment))) 424 425 inline void* align_ptr_up(void* ptr, size_t alignment) { 426 return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment); 427 } 428 429 inline void* align_ptr_down(void* ptr, size_t alignment) { 430 return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment); 431 } 432 433 // Align objects by rounding up their size, in HeapWord units. 434 435 #define align_object_size_(size) align_size_up_(size, MinObjAlignment) 436 437 inline intptr_t align_object_size(intptr_t size) { 438 return align_size_up(size, MinObjAlignment); 439 } 440 441 inline bool is_object_aligned(intptr_t addr) { 442 return addr == align_object_size(addr); 443 } 444 445 // Pad out certain offsets to jlong alignment, in HeapWord units. 446 447 inline intptr_t align_object_offset(intptr_t offset) { 448 return align_size_up(offset, HeapWordsPerLong); 449 } 450 451 inline void* align_pointer_up(const void* addr, size_t size) { 452 return (void*) align_size_up_((uintptr_t)addr, size); 453 } 454 455 // Clamp an address to be within a specific page 456 // 1. If addr is on the page it is returned as is 457 // 2. If addr is above the page_address the start of the *next* page will be returned 458 // 3. Otherwise, if addr is below the page_address the start of the page will be returned 459 inline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) { 460 if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) { 461 // address is in the specified page, just return it as is 462 return addr; 463 } else if (addr > page_address) { 464 // address is above specified page, return start of next page 465 return (address)align_size_down(intptr_t(page_address), page_size) + page_size; 466 } else { 467 // address is below specified page, return start of page 468 return (address)align_size_down(intptr_t(page_address), page_size); 469 } 470 } 471 472 473 // The expected size in bytes of a cache line, used to pad data structures. 474 #define DEFAULT_CACHE_LINE_SIZE 64 475 476 477 //---------------------------------------------------------------------------------------------------- 478 // Utility macros for compilers 479 // used to silence compiler warnings 480 481 #define Unused_Variable(var) var 482 483 484 //---------------------------------------------------------------------------------------------------- 485 // Miscellaneous 486 487 // 6302670 Eliminate Hotspot __fabsf dependency 488 // All fabs() callers should call this function instead, which will implicitly 489 // convert the operand to double, avoiding a dependency on __fabsf which 490 // doesn't exist in early versions of Solaris 8. 491 inline double fabsd(double value) { 492 return fabs(value); 493 } 494 495 inline jint low (jlong value) { return jint(value); } 496 inline jint high(jlong value) { return jint(value >> 32); } 497 498 // the fancy casts are a hopefully portable way 499 // to do unsigned 32 to 64 bit type conversion 500 inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32; 501 *value |= (jlong)(julong)(juint)low; } 502 503 inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff; 504 *value |= (jlong)high << 32; } 505 506 inline jlong jlong_from(jint h, jint l) { 507 jlong result = 0; // initialization to avoid warning 508 set_high(&result, h); 509 set_low(&result, l); 510 return result; 511 } 512 513 union jlong_accessor { 514 jint words[2]; 515 jlong long_value; 516 }; 517 518 void basic_types_init(); // cannot define here; uses assert 519 520 521 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java 522 enum BasicType { 523 T_BOOLEAN = 4, 524 T_CHAR = 5, 525 T_FLOAT = 6, 526 T_DOUBLE = 7, 527 T_BYTE = 8, 528 T_SHORT = 9, 529 T_INT = 10, 530 T_LONG = 11, 531 T_OBJECT = 12, 532 T_ARRAY = 13, 533 T_VOID = 14, 534 T_ADDRESS = 15, 535 T_NARROWOOP = 16, 536 T_METADATA = 17, 537 T_NARROWKLASS = 18, 538 T_CONFLICT = 19, // for stack value type with conflicting contents 539 T_ILLEGAL = 99 540 }; 541 542 inline bool is_java_primitive(BasicType t) { 543 return T_BOOLEAN <= t && t <= T_LONG; 544 } 545 546 inline bool is_subword_type(BasicType t) { 547 // these guys are processed exactly like T_INT in calling sequences: 548 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT); 549 } 550 551 inline bool is_signed_subword_type(BasicType t) { 552 return (t == T_BYTE || t == T_SHORT); 553 } 554 555 // Convert a char from a classfile signature to a BasicType 556 inline BasicType char2type(char c) { 557 switch( c ) { 558 case 'B': return T_BYTE; 559 case 'C': return T_CHAR; 560 case 'D': return T_DOUBLE; 561 case 'F': return T_FLOAT; 562 case 'I': return T_INT; 563 case 'J': return T_LONG; 564 case 'S': return T_SHORT; 565 case 'Z': return T_BOOLEAN; 566 case 'V': return T_VOID; 567 case 'L': return T_OBJECT; 568 case '[': return T_ARRAY; 569 } 570 return T_ILLEGAL; 571 } 572 573 extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar 574 inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; } 575 extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements 576 extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar 577 inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; } 578 extern BasicType name2type(const char* name); 579 580 // Auxilary math routines 581 // least common multiple 582 extern size_t lcm(size_t a, size_t b); 583 584 585 // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java 586 enum BasicTypeSize { 587 T_BOOLEAN_size = 1, 588 T_CHAR_size = 1, 589 T_FLOAT_size = 1, 590 T_DOUBLE_size = 2, 591 T_BYTE_size = 1, 592 T_SHORT_size = 1, 593 T_INT_size = 1, 594 T_LONG_size = 2, 595 T_OBJECT_size = 1, 596 T_ARRAY_size = 1, 597 T_NARROWOOP_size = 1, 598 T_NARROWKLASS_size = 1, 599 T_VOID_size = 0 600 }; 601 602 603 // maps a BasicType to its instance field storage type: 604 // all sub-word integral types are widened to T_INT 605 extern BasicType type2field[T_CONFLICT+1]; 606 extern BasicType type2wfield[T_CONFLICT+1]; 607 608 609 // size in bytes 610 enum ArrayElementSize { 611 T_BOOLEAN_aelem_bytes = 1, 612 T_CHAR_aelem_bytes = 2, 613 T_FLOAT_aelem_bytes = 4, 614 T_DOUBLE_aelem_bytes = 8, 615 T_BYTE_aelem_bytes = 1, 616 T_SHORT_aelem_bytes = 2, 617 T_INT_aelem_bytes = 4, 618 T_LONG_aelem_bytes = 8, 619 #ifdef _LP64 620 T_OBJECT_aelem_bytes = 8, 621 T_ARRAY_aelem_bytes = 8, 622 #else 623 T_OBJECT_aelem_bytes = 4, 624 T_ARRAY_aelem_bytes = 4, 625 #endif 626 T_NARROWOOP_aelem_bytes = 4, 627 T_NARROWKLASS_aelem_bytes = 4, 628 T_VOID_aelem_bytes = 0 629 }; 630 631 extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element 632 #ifdef ASSERT 633 extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts 634 #else 635 inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; } 636 #endif 637 638 639 // JavaValue serves as a container for arbitrary Java values. 640 641 class JavaValue { 642 643 public: 644 typedef union JavaCallValue { 645 jfloat f; 646 jdouble d; 647 jint i; 648 jlong l; 649 jobject h; 650 } JavaCallValue; 651 652 private: 653 BasicType _type; 654 JavaCallValue _value; 655 656 public: 657 JavaValue(BasicType t = T_ILLEGAL) { _type = t; } 658 659 JavaValue(jfloat value) { 660 _type = T_FLOAT; 661 _value.f = value; 662 } 663 664 JavaValue(jdouble value) { 665 _type = T_DOUBLE; 666 _value.d = value; 667 } 668 669 jfloat get_jfloat() const { return _value.f; } 670 jdouble get_jdouble() const { return _value.d; } 671 jint get_jint() const { return _value.i; } 672 jlong get_jlong() const { return _value.l; } 673 jobject get_jobject() const { return _value.h; } 674 JavaCallValue* get_value_addr() { return &_value; } 675 BasicType get_type() const { return _type; } 676 677 void set_jfloat(jfloat f) { _value.f = f;} 678 void set_jdouble(jdouble d) { _value.d = d;} 679 void set_jint(jint i) { _value.i = i;} 680 void set_jlong(jlong l) { _value.l = l;} 681 void set_jobject(jobject h) { _value.h = h;} 682 void set_type(BasicType t) { _type = t; } 683 684 jboolean get_jboolean() const { return (jboolean) (_value.i);} 685 jbyte get_jbyte() const { return (jbyte) (_value.i);} 686 jchar get_jchar() const { return (jchar) (_value.i);} 687 jshort get_jshort() const { return (jshort) (_value.i);} 688 689 }; 690 691 692 #define STACK_BIAS 0 693 // V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff 694 // in order to extend the reach of the stack pointer. 695 #if defined(SPARC) && defined(_LP64) 696 #undef STACK_BIAS 697 #define STACK_BIAS 0x7ff 698 #endif 699 700 701 // TosState describes the top-of-stack state before and after the execution of 702 // a bytecode or method. The top-of-stack value may be cached in one or more CPU 703 // registers. The TosState corresponds to the 'machine represention' of this cached 704 // value. There's 4 states corresponding to the JAVA types int, long, float & double 705 // as well as a 5th state in case the top-of-stack value is actually on the top 706 // of stack (in memory) and thus not cached. The atos state corresponds to the itos 707 // state when it comes to machine representation but is used separately for (oop) 708 // type specific operations (e.g. verification code). 709 710 enum TosState { // describes the tos cache contents 711 btos = 0, // byte, bool tos cached 712 ctos = 1, // char tos cached 713 stos = 2, // short tos cached 714 itos = 3, // int tos cached 715 ltos = 4, // long tos cached 716 ftos = 5, // float tos cached 717 dtos = 6, // double tos cached 718 atos = 7, // object cached 719 vtos = 8, // tos not cached 720 number_of_states, 721 ilgl // illegal state: should not occur 722 }; 723 724 725 inline TosState as_TosState(BasicType type) { 726 switch (type) { 727 case T_BYTE : return btos; 728 case T_BOOLEAN: return btos; // FIXME: Add ztos 729 case T_CHAR : return ctos; 730 case T_SHORT : return stos; 731 case T_INT : return itos; 732 case T_LONG : return ltos; 733 case T_FLOAT : return ftos; 734 case T_DOUBLE : return dtos; 735 case T_VOID : return vtos; 736 case T_ARRAY : // fall through 737 case T_OBJECT : return atos; 738 } 739 return ilgl; 740 } 741 742 inline BasicType as_BasicType(TosState state) { 743 switch (state) { 744 //case ztos: return T_BOOLEAN;//FIXME 745 case btos : return T_BYTE; 746 case ctos : return T_CHAR; 747 case stos : return T_SHORT; 748 case itos : return T_INT; 749 case ltos : return T_LONG; 750 case ftos : return T_FLOAT; 751 case dtos : return T_DOUBLE; 752 case atos : return T_OBJECT; 753 case vtos : return T_VOID; 754 } 755 return T_ILLEGAL; 756 } 757 758 759 // Helper function to convert BasicType info into TosState 760 // Note: Cannot define here as it uses global constant at the time being. 761 TosState as_TosState(BasicType type); 762 763 764 // JavaThreadState keeps track of which part of the code a thread is executing in. This 765 // information is needed by the safepoint code. 766 // 767 // There are 4 essential states: 768 // 769 // _thread_new : Just started, but not executed init. code yet (most likely still in OS init code) 770 // _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles 771 // _thread_in_vm : Executing in the vm 772 // _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub) 773 // 774 // Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in 775 // a transition from one state to another. These extra states makes it possible for the safepoint code to 776 // handle certain thread_states without having to suspend the thread - making the safepoint code faster. 777 // 778 // Given a state, the xxx_trans state can always be found by adding 1. 779 // 780 enum JavaThreadState { 781 _thread_uninitialized = 0, // should never happen (missing initialization) 782 _thread_new = 2, // just starting up, i.e., in process of being initialized 783 _thread_new_trans = 3, // corresponding transition state (not used, included for completness) 784 _thread_in_native = 4, // running in native code 785 _thread_in_native_trans = 5, // corresponding transition state 786 _thread_in_vm = 6, // running in VM 787 _thread_in_vm_trans = 7, // corresponding transition state 788 _thread_in_Java = 8, // running in Java or in stub code 789 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness) 790 _thread_blocked = 10, // blocked in vm 791 _thread_blocked_trans = 11, // corresponding transition state 792 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation 793 }; 794 795 796 // Handy constants for deciding which compiler mode to use. 797 enum MethodCompilation { 798 InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation 799 InvalidOSREntryBci = -2 800 }; 801 802 // Enumeration to distinguish tiers of compilation 803 enum CompLevel { 804 CompLevel_any = -1, 805 CompLevel_all = -1, 806 CompLevel_none = 0, // Interpreter 807 CompLevel_simple = 1, // C1 808 CompLevel_limited_profile = 2, // C1, invocation & backedge counters 809 CompLevel_full_profile = 3, // C1, invocation & backedge counters + mdo 810 CompLevel_full_optimization = 4, // C2 or Shark 811 812 #if defined(COMPILER2) || defined(SHARK) 813 CompLevel_highest_tier = CompLevel_full_optimization, // pure C2 and tiered 814 #elif defined(COMPILER1) 815 CompLevel_highest_tier = CompLevel_simple, // pure C1 816 #else 817 CompLevel_highest_tier = CompLevel_none, 818 #endif 819 820 #if defined(TIERED) 821 CompLevel_initial_compile = CompLevel_full_profile // tiered 822 #elif defined(COMPILER1) 823 CompLevel_initial_compile = CompLevel_simple // pure C1 824 #elif defined(COMPILER2) || defined(SHARK) 825 CompLevel_initial_compile = CompLevel_full_optimization // pure C2 826 #else 827 CompLevel_initial_compile = CompLevel_none 828 #endif 829 }; 830 831 inline bool is_c1_compile(int comp_level) { 832 return comp_level > CompLevel_none && comp_level < CompLevel_full_optimization; 833 } 834 835 inline bool is_c2_compile(int comp_level) { 836 return comp_level == CompLevel_full_optimization; 837 } 838 839 inline bool is_highest_tier_compile(int comp_level) { 840 return comp_level == CompLevel_highest_tier; 841 } 842 843 inline bool is_compile(int comp_level) { 844 return is_c1_compile(comp_level) || is_c2_compile(comp_level); 845 } 846 847 //---------------------------------------------------------------------------------------------------- 848 // 'Forward' declarations of frequently used classes 849 // (in order to reduce interface dependencies & reduce 850 // number of unnecessary compilations after changes) 851 852 class symbolTable; 853 class ClassFileStream; 854 855 class Event; 856 857 class Thread; 858 class VMThread; 859 class JavaThread; 860 class Threads; 861 862 class VM_Operation; 863 class VMOperationQueue; 864 865 class CodeBlob; 866 class nmethod; 867 class OSRAdapter; 868 class I2CAdapter; 869 class C2IAdapter; 870 class CompiledIC; 871 class relocInfo; 872 class ScopeDesc; 873 class PcDesc; 874 875 class Recompiler; 876 class Recompilee; 877 class RecompilationPolicy; 878 class RFrame; 879 class CompiledRFrame; 880 class InterpretedRFrame; 881 882 class frame; 883 884 class vframe; 885 class javaVFrame; 886 class interpretedVFrame; 887 class compiledVFrame; 888 class deoptimizedVFrame; 889 class externalVFrame; 890 class entryVFrame; 891 892 class RegisterMap; 893 894 class Mutex; 895 class Monitor; 896 class BasicLock; 897 class BasicObjectLock; 898 899 class PeriodicTask; 900 901 class JavaCallWrapper; 902 903 class oopDesc; 904 class metaDataOopDesc; 905 906 class NativeCall; 907 908 class zone; 909 910 class StubQueue; 911 912 class outputStream; 913 914 class ResourceArea; 915 916 class DebugInformationRecorder; 917 class ScopeValue; 918 class CompressedStream; 919 class DebugInfoReadStream; 920 class DebugInfoWriteStream; 921 class LocationValue; 922 class ConstantValue; 923 class IllegalValue; 924 925 class PrivilegedElement; 926 class MonitorArray; 927 928 class MonitorInfo; 929 930 class OffsetClosure; 931 class OopMapCache; 932 class InterpreterOopMap; 933 class OopMapCacheEntry; 934 class OSThread; 935 936 typedef int (*OSThreadStartFunc)(void*); 937 938 class Space; 939 940 class JavaValue; 941 class methodHandle; 942 class JavaCallArguments; 943 944 // Basic support for errors (general debug facilities not defined at this point fo the include phase) 945 946 extern void basic_fatal(const char* msg); 947 948 949 //---------------------------------------------------------------------------------------------------- 950 // Special constants for debugging 951 952 const jint badInt = -3; // generic "bad int" value 953 const long badAddressVal = -2; // generic "bad address" value 954 const long badOopVal = -1; // generic "bad oop" value 955 const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC 956 const int badHandleValue = 0xBC; // value used to zap vm handle area 957 const int badResourceValue = 0xAB; // value used to zap resource area 958 const int freeBlockPad = 0xBA; // value used to pad freed blocks. 959 const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks. 960 const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area 961 const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC 962 const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC 963 const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation 964 const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation 965 966 967 // (These must be implemented as #defines because C++ compilers are 968 // not obligated to inline non-integral constants!) 969 #define badAddress ((address)::badAddressVal) 970 #define badOop ((oop)::badOopVal) 971 #define badHeapWord (::badHeapWordVal) 972 #define badJNIHandle ((oop)::badJNIHandleVal) 973 974 // Default TaskQueue size is 16K (32-bit) or 128K (64-bit) 975 #define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17)) 976 977 //---------------------------------------------------------------------------------------------------- 978 // Utility functions for bitfield manipulations 979 980 const intptr_t AllBits = ~0; // all bits set in a word 981 const intptr_t NoBits = 0; // no bits set in a word 982 const jlong NoLongBits = 0; // no bits set in a long 983 const intptr_t OneBit = 1; // only right_most bit set in a word 984 985 // get a word with the n.th or the right-most or left-most n bits set 986 // (note: #define used only so that they can be used in enum constant definitions) 987 #define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n)) 988 #define right_n_bits(n) (nth_bit(n) - 1) 989 #define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n))) 990 991 // bit-operations using a mask m 992 inline void set_bits (intptr_t& x, intptr_t m) { x |= m; } 993 inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; } 994 inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; } 995 inline jlong mask_long_bits (jlong x, jlong m) { return x & m; } 996 inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; } 997 998 // bit-operations using the n.th bit 999 inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); } 1000 inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); } 1001 inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; } 1002 1003 // returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!) 1004 inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) { 1005 return mask_bits(x >> start_bit_no, right_n_bits(field_length)); 1006 } 1007 1008 1009 //---------------------------------------------------------------------------------------------------- 1010 // Utility functions for integers 1011 1012 // Avoid use of global min/max macros which may cause unwanted double 1013 // evaluation of arguments. 1014 #ifdef max 1015 #undef max 1016 #endif 1017 1018 #ifdef min 1019 #undef min 1020 #endif 1021 1022 #define max(a,b) Do_not_use_max_use_MAX2_instead 1023 #define min(a,b) Do_not_use_min_use_MIN2_instead 1024 1025 // It is necessary to use templates here. Having normal overloaded 1026 // functions does not work because it is necessary to provide both 32- 1027 // and 64-bit overloaded functions, which does not work, and having 1028 // explicitly-typed versions of these routines (i.e., MAX2I, MAX2L) 1029 // will be even more error-prone than macros. 1030 template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; } 1031 template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; } 1032 template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); } 1033 template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); } 1034 template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); } 1035 template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); } 1036 1037 template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; } 1038 1039 // true if x is a power of 2, false otherwise 1040 inline bool is_power_of_2(intptr_t x) { 1041 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits)); 1042 } 1043 1044 // long version of is_power_of_2 1045 inline bool is_power_of_2_long(jlong x) { 1046 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits)); 1047 } 1048 1049 //* largest i such that 2^i <= x 1050 // A negative value of 'x' will return '31' 1051 inline int log2_intptr(intptr_t x) { 1052 int i = -1; 1053 uintptr_t p = 1; 1054 while (p != 0 && p <= (uintptr_t)x) { 1055 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) 1056 i++; p *= 2; 1057 } 1058 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) 1059 // (if p = 0 then overflow occurred and i = 31) 1060 return i; 1061 } 1062 1063 //* largest i such that 2^i <= x 1064 // A negative value of 'x' will return '63' 1065 inline int log2_long(jlong x) { 1066 int i = -1; 1067 julong p = 1; 1068 while (p != 0 && p <= (julong)x) { 1069 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) 1070 i++; p *= 2; 1071 } 1072 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) 1073 // (if p = 0 then overflow occurred and i = 63) 1074 return i; 1075 } 1076 1077 //* the argument must be exactly a power of 2 1078 inline int exact_log2(intptr_t x) { 1079 #ifdef ASSERT 1080 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2"); 1081 #endif 1082 return log2_intptr(x); 1083 } 1084 1085 //* the argument must be exactly a power of 2 1086 inline int exact_log2_long(jlong x) { 1087 #ifdef ASSERT 1088 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2"); 1089 #endif 1090 return log2_long(x); 1091 } 1092 1093 1094 // returns integer round-up to the nearest multiple of s (s must be a power of two) 1095 inline intptr_t round_to(intptr_t x, uintx s) { 1096 #ifdef ASSERT 1097 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); 1098 #endif 1099 const uintx m = s - 1; 1100 return mask_bits(x + m, ~m); 1101 } 1102 1103 // returns integer round-down to the nearest multiple of s (s must be a power of two) 1104 inline intptr_t round_down(intptr_t x, uintx s) { 1105 #ifdef ASSERT 1106 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); 1107 #endif 1108 const uintx m = s - 1; 1109 return mask_bits(x, ~m); 1110 } 1111 1112 1113 inline bool is_odd (intx x) { return x & 1; } 1114 inline bool is_even(intx x) { return !is_odd(x); } 1115 1116 // "to" should be greater than "from." 1117 inline intx byte_size(void* from, void* to) { 1118 return (address)to - (address)from; 1119 } 1120 1121 //---------------------------------------------------------------------------------------------------- 1122 // Avoid non-portable casts with these routines (DEPRECATED) 1123 1124 // NOTE: USE Bytes class INSTEAD WHERE POSSIBLE 1125 // Bytes is optimized machine-specifically and may be much faster then the portable routines below. 1126 1127 // Given sequence of four bytes, build into a 32-bit word 1128 // following the conventions used in class files. 1129 // On the 386, this could be realized with a simple address cast. 1130 // 1131 1132 // This routine takes eight bytes: 1133 inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1134 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 )) 1135 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 )) 1136 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 )) 1137 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 )) 1138 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 )) 1139 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 )) 1140 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 )) 1141 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 )); 1142 } 1143 1144 // This routine takes four bytes: 1145 inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { 1146 return (( u4(c1) << 24 ) & 0xff000000) 1147 | (( u4(c2) << 16 ) & 0x00ff0000) 1148 | (( u4(c3) << 8 ) & 0x0000ff00) 1149 | (( u4(c4) << 0 ) & 0x000000ff); 1150 } 1151 1152 // And this one works if the four bytes are contiguous in memory: 1153 inline u4 build_u4_from( u1* p ) { 1154 return build_u4_from( p[0], p[1], p[2], p[3] ); 1155 } 1156 1157 // Ditto for two-byte ints: 1158 inline u2 build_u2_from( u1 c1, u1 c2 ) { 1159 return u2((( u2(c1) << 8 ) & 0xff00) 1160 | (( u2(c2) << 0 ) & 0x00ff)); 1161 } 1162 1163 // And this one works if the two bytes are contiguous in memory: 1164 inline u2 build_u2_from( u1* p ) { 1165 return build_u2_from( p[0], p[1] ); 1166 } 1167 1168 // Ditto for floats: 1169 inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { 1170 u4 u = build_u4_from( c1, c2, c3, c4 ); 1171 return *(jfloat*)&u; 1172 } 1173 1174 inline jfloat build_float_from( u1* p ) { 1175 u4 u = build_u4_from( p ); 1176 return *(jfloat*)&u; 1177 } 1178 1179 1180 // now (64-bit) longs 1181 1182 inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1183 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 )) 1184 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 )) 1185 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 )) 1186 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 )) 1187 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 )) 1188 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 )) 1189 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 )) 1190 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 )); 1191 } 1192 1193 inline jlong build_long_from( u1* p ) { 1194 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] ); 1195 } 1196 1197 1198 // Doubles, too! 1199 inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1200 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 ); 1201 return *(jdouble*)&u; 1202 } 1203 1204 inline jdouble build_double_from( u1* p ) { 1205 jlong u = build_long_from( p ); 1206 return *(jdouble*)&u; 1207 } 1208 1209 1210 // Portable routines to go the other way: 1211 1212 inline void explode_short_to( u2 x, u1& c1, u1& c2 ) { 1213 c1 = u1(x >> 8); 1214 c2 = u1(x); 1215 } 1216 1217 inline void explode_short_to( u2 x, u1* p ) { 1218 explode_short_to( x, p[0], p[1]); 1219 } 1220 1221 inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) { 1222 c1 = u1(x >> 24); 1223 c2 = u1(x >> 16); 1224 c3 = u1(x >> 8); 1225 c4 = u1(x); 1226 } 1227 1228 inline void explode_int_to( u4 x, u1* p ) { 1229 explode_int_to( x, p[0], p[1], p[2], p[3]); 1230 } 1231 1232 1233 // Pack and extract shorts to/from ints: 1234 1235 inline int extract_low_short_from_int(jint x) { 1236 return x & 0xffff; 1237 } 1238 1239 inline int extract_high_short_from_int(jint x) { 1240 return (x >> 16) & 0xffff; 1241 } 1242 1243 inline int build_int_from_shorts( jushort low, jushort high ) { 1244 return ((int)((unsigned int)high << 16) | (unsigned int)low); 1245 } 1246 1247 // Printf-style formatters for fixed- and variable-width types as pointers and 1248 // integers. These are derived from the definitions in inttypes.h. If the platform 1249 // doesn't provide appropriate definitions, they should be provided in 1250 // the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp) 1251 1252 #define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false") 1253 1254 // Format 32-bit quantities. 1255 #define INT32_FORMAT "%" PRId32 1256 #define UINT32_FORMAT "%" PRIu32 1257 #define INT32_FORMAT_W(width) "%" #width PRId32 1258 #define UINT32_FORMAT_W(width) "%" #width PRIu32 1259 1260 #define PTR32_FORMAT "0x%08" PRIx32 1261 1262 // Format 64-bit quantities. 1263 #define INT64_FORMAT "%" PRId64 1264 #define UINT64_FORMAT "%" PRIu64 1265 #define INT64_FORMAT_W(width) "%" #width PRId64 1266 #define UINT64_FORMAT_W(width) "%" #width PRIu64 1267 1268 #define PTR64_FORMAT "0x%016" PRIx64 1269 1270 // Format jlong, if necessary 1271 #ifndef JLONG_FORMAT 1272 #define JLONG_FORMAT INT64_FORMAT 1273 #endif 1274 #ifndef JULONG_FORMAT 1275 #define JULONG_FORMAT UINT64_FORMAT 1276 #endif 1277 1278 // Format pointers which change size between 32- and 64-bit. 1279 #ifdef _LP64 1280 #define INTPTR_FORMAT "0x%016" PRIxPTR 1281 #define PTR_FORMAT "0x%016" PRIxPTR 1282 #else // !_LP64 1283 #define INTPTR_FORMAT "0x%08" PRIxPTR 1284 #define PTR_FORMAT "0x%08" PRIxPTR 1285 #endif // _LP64 1286 1287 #define SSIZE_FORMAT "%" PRIdPTR 1288 #define SIZE_FORMAT "%" PRIuPTR 1289 #define SSIZE_FORMAT_W(width) "%" #width PRIdPTR 1290 #define SIZE_FORMAT_W(width) "%" #width PRIuPTR 1291 1292 #define INTX_FORMAT "%" PRIdPTR 1293 #define UINTX_FORMAT "%" PRIuPTR 1294 #define INTX_FORMAT_W(width) "%" #width PRIdPTR 1295 #define UINTX_FORMAT_W(width) "%" #width PRIuPTR 1296 1297 1298 // Enable zap-a-lot if in debug version. 1299 1300 # ifdef ASSERT 1301 # ifdef COMPILER2 1302 # define ENABLE_ZAP_DEAD_LOCALS 1303 #endif /* COMPILER2 */ 1304 # endif /* ASSERT */ 1305 1306 #define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0])) 1307 1308 // Dereference vptr 1309 // All C++ compilers that we know of have the vtbl pointer in the first 1310 // word. If there are exceptions, this function needs to be made compiler 1311 // specific. 1312 static inline void* dereference_vptr(void* addr) { 1313 return *(void**)addr; 1314 } 1315 1316 1317 #ifndef PRODUCT 1318 1319 // For unit testing only 1320 class GlobalDefinitions { 1321 public: 1322 static void test_globals(); 1323 }; 1324 1325 #endif // PRODUCT 1326 1327 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP