globalDefinitions.hpp revision 4030:203f64878aab
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 50const int LogBytesPerShort = 1; 51const int LogBytesPerInt = 2; 52#ifdef _LP64 53const int LogBytesPerWord = 3; 54#else 55const int LogBytesPerWord = 2; 56#endif 57const int LogBytesPerLong = 3; 58 59const int BytesPerShort = 1 << LogBytesPerShort; 60const int BytesPerInt = 1 << LogBytesPerInt; 61const int BytesPerWord = 1 << LogBytesPerWord; 62const int BytesPerLong = 1 << LogBytesPerLong; 63 64const int LogBitsPerByte = 3; 65const int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort; 66const int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt; 67const int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord; 68const int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong; 69 70const int BitsPerByte = 1 << LogBitsPerByte; 71const int BitsPerShort = 1 << LogBitsPerShort; 72const int BitsPerInt = 1 << LogBitsPerInt; 73const int BitsPerWord = 1 << LogBitsPerWord; 74const int BitsPerLong = 1 << LogBitsPerLong; 75 76const int WordAlignmentMask = (1 << LogBytesPerWord) - 1; 77const int LongAlignmentMask = (1 << LogBytesPerLong) - 1; 78 79const int WordsPerLong = 2; // Number of stack entries for longs 80 81const int oopSize = sizeof(char*); // Full-width oop 82extern int heapOopSize; // Oop within a java object 83const int wordSize = sizeof(char*); 84const int longSize = sizeof(jlong); 85const int jintSize = sizeof(jint); 86const int size_tSize = sizeof(size_t); 87 88const int BytesPerOop = BytesPerWord; // Full-width oop 89 90extern int LogBytesPerHeapOop; // Oop within a java object 91extern int LogBitsPerHeapOop; 92extern int BytesPerHeapOop; 93extern int BitsPerHeapOop; 94 95// Oop encoding heap max 96extern uint64_t OopEncodingHeapMax; 97 98const int BitsPerJavaInteger = 32; 99const int BitsPerJavaLong = 64; 100const int BitsPerSize_t = size_tSize * BitsPerByte; 101 102// Size of a char[] needed to represent a jint as a string in decimal. 103const 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 109const int SerializePageShiftCount = 4; 110#else 111const 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. 121class 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. 133class MetaWord { 134 friend class VMStructs; 135 private: 136 char* i; 137}; 138 139// HeapWordSize must be 2^LogHeapWordSize. 140const int HeapWordSize = sizeof(HeapWord); 141#ifdef _LP64 142const int LogHeapWordSize = 3; 143#else 144const int LogHeapWordSize = 2; 145#endif 146const int HeapWordsPerLong = BytesPerLong / HeapWordSize; 147const 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 required 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. 162inline size_t heap_word_size(size_t byte_size) { 163 return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize; 164} 165 166 167const size_t K = 1024; 168const size_t M = K*K; 169const size_t G = M*K; 170const size_t HWperKB = K / sizeof(HeapWord); 171 172const jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint 173const 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 178const int MILLIUNITS = 1000; // milli units per base unit 179const int MICROUNITS = 1000000; // micro units per base unit 180const int NANOUNITS = 1000000000; // nano units per base unit 181 182const jlong NANOSECS_PER_SEC = CONST64(1000000000); 183const jint NANOSECS_PER_MILLISEC = 1000000; 184 185inline 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 200template <class T> 201inline 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 222typedef intptr_t intx; 223typedef uintptr_t uintx; 224 225const intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1); 226const intx max_intx = (uintx)min_intx - 1; 227const 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 235typedef unsigned int uint; NEEDS_CLEANUP 236 237 238//---------------------------------------------------------------------------------------------------- 239// Java type definitions 240 241// All kinds of 'plain' byte addresses 242typedef signed char s_char; 243typedef unsigned char u_char; 244typedef u_char* address; 245typedef 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 254inline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); } 255inline 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 259inline address_word mask_address_bits(address x, int m) { return address_word(x) & m; } 260inline address_word castable_address(address x) { return address_word(x) ; } 261inline 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(). 274inline 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. 280inline 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. 284inline 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 309typedef jubyte u1; 310typedef jushort u2; 311typedef juint u4; 312typedef julong u8; 313 314const jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte 315const jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort 316const juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint 317const julong max_julong = (julong)-1; // 0xFF....FF largest julong 318 319typedef jbyte s1; 320typedef jshort s2; 321typedef jint s4; 322typedef jlong s8; 323 324//---------------------------------------------------------------------------------------------------- 325// JVM spec restrictions 326 327const int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134) 328 329 330//---------------------------------------------------------------------------------------------------- 331// Minimum StringTableSize value 332 333const int defaultStringTableSize=1009; 334 335 336//---------------------------------------------------------------------------------------------------- 337// HotSwap - for JVMTI aka Class File Replacement and PopFrame 338// 339// Determines whether on-the-fly class replacement and frame popping are enabled. 340 341#define HOTSWAP 342 343//---------------------------------------------------------------------------------------------------- 344// Object alignment, in units of HeapWords. 345// 346// Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and 347// reference fields can be naturally aligned. 348 349extern int MinObjAlignment; 350extern int MinObjAlignmentInBytes; 351extern int MinObjAlignmentInBytesMask; 352 353extern int LogMinObjAlignment; 354extern int LogMinObjAlignmentInBytes; 355 356const int LogKlassAlignmentInBytes = 3; 357const int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize; 358const int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes; 359const int KlassAlignment = KlassAlignmentInBytes / HeapWordSize; 360 361// Klass encoding metaspace max size 362const uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes; 363 364// Machine dependent stuff 365 366#ifdef TARGET_ARCH_x86 367# include "globalDefinitions_x86.hpp" 368#endif 369#ifdef TARGET_ARCH_sparc 370# include "globalDefinitions_sparc.hpp" 371#endif 372#ifdef TARGET_ARCH_zero 373# include "globalDefinitions_zero.hpp" 374#endif 375#ifdef TARGET_ARCH_arm 376# include "globalDefinitions_arm.hpp" 377#endif 378#ifdef TARGET_ARCH_ppc 379# include "globalDefinitions_ppc.hpp" 380#endif 381 382 383// The byte alignment to be used by Arena::Amalloc. See bugid 4169348. 384// Note: this value must be a power of 2 385 386#define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord) 387 388// Signed variants of alignment helpers. There are two versions of each, a macro 389// for use in places like enum definitions that require compile-time constant 390// expressions and a function for all other places so as to get type checking. 391 392#define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1)) 393 394inline intptr_t align_size_up(intptr_t size, intptr_t alignment) { 395 return align_size_up_(size, alignment); 396} 397 398#define align_size_down_(size, alignment) ((size) & ~((alignment) - 1)) 399 400inline intptr_t align_size_down(intptr_t size, intptr_t alignment) { 401 return align_size_down_(size, alignment); 402} 403 404// Align objects by rounding up their size, in HeapWord units. 405 406#define align_object_size_(size) align_size_up_(size, MinObjAlignment) 407 408inline intptr_t align_object_size(intptr_t size) { 409 return align_size_up(size, MinObjAlignment); 410} 411 412inline bool is_object_aligned(intptr_t addr) { 413 return addr == align_object_size(addr); 414} 415 416// Pad out certain offsets to jlong alignment, in HeapWord units. 417 418inline intptr_t align_object_offset(intptr_t offset) { 419 return align_size_up(offset, HeapWordsPerLong); 420} 421 422// The expected size in bytes of a cache line, used to pad data structures. 423#define DEFAULT_CACHE_LINE_SIZE 64 424 425// Bytes needed to pad type to avoid cache-line sharing; alignment should be the 426// expected cache line size (a power of two). The first addend avoids sharing 427// when the start address is not a multiple of alignment; the second maintains 428// alignment of starting addresses that happen to be a multiple. 429#define PADDING_SIZE(type, alignment) \ 430 ((alignment) + align_size_up_(sizeof(type), alignment)) 431 432// Templates to create a subclass padded to avoid cache line sharing. These are 433// effective only when applied to derived-most (leaf) classes. 434 435// When no args are passed to the base ctor. 436template <class T, size_t alignment = DEFAULT_CACHE_LINE_SIZE> 437class Padded: public T { 438private: 439 char _pad_buf_[PADDING_SIZE(T, alignment)]; 440}; 441 442// When either 0 or 1 args may be passed to the base ctor. 443template <class T, typename Arg1T, size_t alignment = DEFAULT_CACHE_LINE_SIZE> 444class Padded01: public T { 445public: 446 Padded01(): T() { } 447 Padded01(Arg1T arg1): T(arg1) { } 448private: 449 char _pad_buf_[PADDING_SIZE(T, alignment)]; 450}; 451 452//---------------------------------------------------------------------------------------------------- 453// Utility macros for compilers 454// used to silence compiler warnings 455 456#define Unused_Variable(var) var 457 458 459//---------------------------------------------------------------------------------------------------- 460// Miscellaneous 461 462// 6302670 Eliminate Hotspot __fabsf dependency 463// All fabs() callers should call this function instead, which will implicitly 464// convert the operand to double, avoiding a dependency on __fabsf which 465// doesn't exist in early versions of Solaris 8. 466inline double fabsd(double value) { 467 return fabs(value); 468} 469 470inline jint low (jlong value) { return jint(value); } 471inline jint high(jlong value) { return jint(value >> 32); } 472 473// the fancy casts are a hopefully portable way 474// to do unsigned 32 to 64 bit type conversion 475inline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32; 476 *value |= (jlong)(julong)(juint)low; } 477 478inline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff; 479 *value |= (jlong)high << 32; } 480 481inline jlong jlong_from(jint h, jint l) { 482 jlong result = 0; // initialization to avoid warning 483 set_high(&result, h); 484 set_low(&result, l); 485 return result; 486} 487 488union jlong_accessor { 489 jint words[2]; 490 jlong long_value; 491}; 492 493void basic_types_init(); // cannot define here; uses assert 494 495 496// NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java 497enum BasicType { 498 T_BOOLEAN = 4, 499 T_CHAR = 5, 500 T_FLOAT = 6, 501 T_DOUBLE = 7, 502 T_BYTE = 8, 503 T_SHORT = 9, 504 T_INT = 10, 505 T_LONG = 11, 506 T_OBJECT = 12, 507 T_ARRAY = 13, 508 T_VOID = 14, 509 T_ADDRESS = 15, 510 T_NARROWOOP = 16, 511 T_METADATA = 17, 512 T_NARROWKLASS = 18, 513 T_CONFLICT = 19, // for stack value type with conflicting contents 514 T_ILLEGAL = 99 515}; 516 517inline bool is_java_primitive(BasicType t) { 518 return T_BOOLEAN <= t && t <= T_LONG; 519} 520 521inline bool is_subword_type(BasicType t) { 522 // these guys are processed exactly like T_INT in calling sequences: 523 return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT); 524} 525 526inline bool is_signed_subword_type(BasicType t) { 527 return (t == T_BYTE || t == T_SHORT); 528} 529 530// Convert a char from a classfile signature to a BasicType 531inline BasicType char2type(char c) { 532 switch( c ) { 533 case 'B': return T_BYTE; 534 case 'C': return T_CHAR; 535 case 'D': return T_DOUBLE; 536 case 'F': return T_FLOAT; 537 case 'I': return T_INT; 538 case 'J': return T_LONG; 539 case 'S': return T_SHORT; 540 case 'Z': return T_BOOLEAN; 541 case 'V': return T_VOID; 542 case 'L': return T_OBJECT; 543 case '[': return T_ARRAY; 544 } 545 return T_ILLEGAL; 546} 547 548extern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar 549inline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; } 550extern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements 551extern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar 552inline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; } 553extern BasicType name2type(const char* name); 554 555// Auxilary math routines 556// least common multiple 557extern size_t lcm(size_t a, size_t b); 558 559 560// NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java 561enum BasicTypeSize { 562 T_BOOLEAN_size = 1, 563 T_CHAR_size = 1, 564 T_FLOAT_size = 1, 565 T_DOUBLE_size = 2, 566 T_BYTE_size = 1, 567 T_SHORT_size = 1, 568 T_INT_size = 1, 569 T_LONG_size = 2, 570 T_OBJECT_size = 1, 571 T_ARRAY_size = 1, 572 T_NARROWOOP_size = 1, 573 T_NARROWKLASS_size = 1, 574 T_VOID_size = 0 575}; 576 577 578// maps a BasicType to its instance field storage type: 579// all sub-word integral types are widened to T_INT 580extern BasicType type2field[T_CONFLICT+1]; 581extern BasicType type2wfield[T_CONFLICT+1]; 582 583 584// size in bytes 585enum ArrayElementSize { 586 T_BOOLEAN_aelem_bytes = 1, 587 T_CHAR_aelem_bytes = 2, 588 T_FLOAT_aelem_bytes = 4, 589 T_DOUBLE_aelem_bytes = 8, 590 T_BYTE_aelem_bytes = 1, 591 T_SHORT_aelem_bytes = 2, 592 T_INT_aelem_bytes = 4, 593 T_LONG_aelem_bytes = 8, 594#ifdef _LP64 595 T_OBJECT_aelem_bytes = 8, 596 T_ARRAY_aelem_bytes = 8, 597#else 598 T_OBJECT_aelem_bytes = 4, 599 T_ARRAY_aelem_bytes = 4, 600#endif 601 T_NARROWOOP_aelem_bytes = 4, 602 T_NARROWKLASS_aelem_bytes = 4, 603 T_VOID_aelem_bytes = 0 604}; 605 606extern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element 607#ifdef ASSERT 608extern int type2aelembytes(BasicType t, bool allow_address = false); // asserts 609#else 610inline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; } 611#endif 612 613 614// JavaValue serves as a container for arbitrary Java values. 615 616class JavaValue { 617 618 public: 619 typedef union JavaCallValue { 620 jfloat f; 621 jdouble d; 622 jint i; 623 jlong l; 624 jobject h; 625 } JavaCallValue; 626 627 private: 628 BasicType _type; 629 JavaCallValue _value; 630 631 public: 632 JavaValue(BasicType t = T_ILLEGAL) { _type = t; } 633 634 JavaValue(jfloat value) { 635 _type = T_FLOAT; 636 _value.f = value; 637 } 638 639 JavaValue(jdouble value) { 640 _type = T_DOUBLE; 641 _value.d = value; 642 } 643 644 jfloat get_jfloat() const { return _value.f; } 645 jdouble get_jdouble() const { return _value.d; } 646 jint get_jint() const { return _value.i; } 647 jlong get_jlong() const { return _value.l; } 648 jobject get_jobject() const { return _value.h; } 649 JavaCallValue* get_value_addr() { return &_value; } 650 BasicType get_type() const { return _type; } 651 652 void set_jfloat(jfloat f) { _value.f = f;} 653 void set_jdouble(jdouble d) { _value.d = d;} 654 void set_jint(jint i) { _value.i = i;} 655 void set_jlong(jlong l) { _value.l = l;} 656 void set_jobject(jobject h) { _value.h = h;} 657 void set_type(BasicType t) { _type = t; } 658 659 jboolean get_jboolean() const { return (jboolean) (_value.i);} 660 jbyte get_jbyte() const { return (jbyte) (_value.i);} 661 jchar get_jchar() const { return (jchar) (_value.i);} 662 jshort get_jshort() const { return (jshort) (_value.i);} 663 664}; 665 666 667#define STACK_BIAS 0 668// V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff 669// in order to extend the reach of the stack pointer. 670#if defined(SPARC) && defined(_LP64) 671#undef STACK_BIAS 672#define STACK_BIAS 0x7ff 673#endif 674 675 676// TosState describes the top-of-stack state before and after the execution of 677// a bytecode or method. The top-of-stack value may be cached in one or more CPU 678// registers. The TosState corresponds to the 'machine represention' of this cached 679// value. There's 4 states corresponding to the JAVA types int, long, float & double 680// as well as a 5th state in case the top-of-stack value is actually on the top 681// of stack (in memory) and thus not cached. The atos state corresponds to the itos 682// state when it comes to machine representation but is used separately for (oop) 683// type specific operations (e.g. verification code). 684 685enum TosState { // describes the tos cache contents 686 btos = 0, // byte, bool tos cached 687 ctos = 1, // char tos cached 688 stos = 2, // short tos cached 689 itos = 3, // int tos cached 690 ltos = 4, // long tos cached 691 ftos = 5, // float tos cached 692 dtos = 6, // double tos cached 693 atos = 7, // object cached 694 vtos = 8, // tos not cached 695 number_of_states, 696 ilgl // illegal state: should not occur 697}; 698 699 700inline TosState as_TosState(BasicType type) { 701 switch (type) { 702 case T_BYTE : return btos; 703 case T_BOOLEAN: return btos; // FIXME: Add ztos 704 case T_CHAR : return ctos; 705 case T_SHORT : return stos; 706 case T_INT : return itos; 707 case T_LONG : return ltos; 708 case T_FLOAT : return ftos; 709 case T_DOUBLE : return dtos; 710 case T_VOID : return vtos; 711 case T_ARRAY : // fall through 712 case T_OBJECT : return atos; 713 } 714 return ilgl; 715} 716 717inline BasicType as_BasicType(TosState state) { 718 switch (state) { 719 //case ztos: return T_BOOLEAN;//FIXME 720 case btos : return T_BYTE; 721 case ctos : return T_CHAR; 722 case stos : return T_SHORT; 723 case itos : return T_INT; 724 case ltos : return T_LONG; 725 case ftos : return T_FLOAT; 726 case dtos : return T_DOUBLE; 727 case atos : return T_OBJECT; 728 case vtos : return T_VOID; 729 } 730 return T_ILLEGAL; 731} 732 733 734// Helper function to convert BasicType info into TosState 735// Note: Cannot define here as it uses global constant at the time being. 736TosState as_TosState(BasicType type); 737 738 739// ReferenceType is used to distinguish between java/lang/ref/Reference subclasses 740 741enum ReferenceType { 742 REF_NONE, // Regular class 743 REF_OTHER, // Subclass of java/lang/ref/Reference, but not subclass of one of the classes below 744 REF_SOFT, // Subclass of java/lang/ref/SoftReference 745 REF_WEAK, // Subclass of java/lang/ref/WeakReference 746 REF_FINAL, // Subclass of java/lang/ref/FinalReference 747 REF_PHANTOM // Subclass of java/lang/ref/PhantomReference 748}; 749 750 751// JavaThreadState keeps track of which part of the code a thread is executing in. This 752// information is needed by the safepoint code. 753// 754// There are 4 essential states: 755// 756// _thread_new : Just started, but not executed init. code yet (most likely still in OS init code) 757// _thread_in_native : In native code. This is a safepoint region, since all oops will be in jobject handles 758// _thread_in_vm : Executing in the vm 759// _thread_in_Java : Executing either interpreted or compiled Java code (or could be in a stub) 760// 761// Each state has an associated xxxx_trans state, which is an intermediate state used when a thread is in 762// a transition from one state to another. These extra states makes it possible for the safepoint code to 763// handle certain thread_states without having to suspend the thread - making the safepoint code faster. 764// 765// Given a state, the xxx_trans state can always be found by adding 1. 766// 767enum JavaThreadState { 768 _thread_uninitialized = 0, // should never happen (missing initialization) 769 _thread_new = 2, // just starting up, i.e., in process of being initialized 770 _thread_new_trans = 3, // corresponding transition state (not used, included for completness) 771 _thread_in_native = 4, // running in native code 772 _thread_in_native_trans = 5, // corresponding transition state 773 _thread_in_vm = 6, // running in VM 774 _thread_in_vm_trans = 7, // corresponding transition state 775 _thread_in_Java = 8, // running in Java or in stub code 776 _thread_in_Java_trans = 9, // corresponding transition state (not used, included for completness) 777 _thread_blocked = 10, // blocked in vm 778 _thread_blocked_trans = 11, // corresponding transition state 779 _thread_max_state = 12 // maximum thread state+1 - used for statistics allocation 780}; 781 782 783// Handy constants for deciding which compiler mode to use. 784enum MethodCompilation { 785 InvocationEntryBci = -1, // i.e., not a on-stack replacement compilation 786 InvalidOSREntryBci = -2 787}; 788 789// Enumeration to distinguish tiers of compilation 790enum CompLevel { 791 CompLevel_any = -1, 792 CompLevel_all = -1, 793 CompLevel_none = 0, // Interpreter 794 CompLevel_simple = 1, // C1 795 CompLevel_limited_profile = 2, // C1, invocation & backedge counters 796 CompLevel_full_profile = 3, // C1, invocation & backedge counters + mdo 797 CompLevel_full_optimization = 4, // C2 or Shark 798 799#if defined(COMPILER2) || defined(SHARK) 800 CompLevel_highest_tier = CompLevel_full_optimization, // pure C2 and tiered 801#elif defined(COMPILER1) 802 CompLevel_highest_tier = CompLevel_simple, // pure C1 803#else 804 CompLevel_highest_tier = CompLevel_none, 805#endif 806 807#if defined(TIERED) 808 CompLevel_initial_compile = CompLevel_full_profile // tiered 809#elif defined(COMPILER1) 810 CompLevel_initial_compile = CompLevel_simple // pure C1 811#elif defined(COMPILER2) || defined(SHARK) 812 CompLevel_initial_compile = CompLevel_full_optimization // pure C2 813#else 814 CompLevel_initial_compile = CompLevel_none 815#endif 816}; 817 818inline bool is_c1_compile(int comp_level) { 819 return comp_level > CompLevel_none && comp_level < CompLevel_full_optimization; 820} 821 822inline bool is_c2_compile(int comp_level) { 823 return comp_level == CompLevel_full_optimization; 824} 825 826inline bool is_highest_tier_compile(int comp_level) { 827 return comp_level == CompLevel_highest_tier; 828} 829 830//---------------------------------------------------------------------------------------------------- 831// 'Forward' declarations of frequently used classes 832// (in order to reduce interface dependencies & reduce 833// number of unnecessary compilations after changes) 834 835class symbolTable; 836class ClassFileStream; 837 838class Event; 839 840class Thread; 841class VMThread; 842class JavaThread; 843class Threads; 844 845class VM_Operation; 846class VMOperationQueue; 847 848class CodeBlob; 849class nmethod; 850class OSRAdapter; 851class I2CAdapter; 852class C2IAdapter; 853class CompiledIC; 854class relocInfo; 855class ScopeDesc; 856class PcDesc; 857 858class Recompiler; 859class Recompilee; 860class RecompilationPolicy; 861class RFrame; 862class CompiledRFrame; 863class InterpretedRFrame; 864 865class frame; 866 867class vframe; 868class javaVFrame; 869class interpretedVFrame; 870class compiledVFrame; 871class deoptimizedVFrame; 872class externalVFrame; 873class entryVFrame; 874 875class RegisterMap; 876 877class Mutex; 878class Monitor; 879class BasicLock; 880class BasicObjectLock; 881 882class PeriodicTask; 883 884class JavaCallWrapper; 885 886class oopDesc; 887class metaDataOopDesc; 888 889class NativeCall; 890 891class zone; 892 893class StubQueue; 894 895class outputStream; 896 897class ResourceArea; 898 899class DebugInformationRecorder; 900class ScopeValue; 901class CompressedStream; 902class DebugInfoReadStream; 903class DebugInfoWriteStream; 904class LocationValue; 905class ConstantValue; 906class IllegalValue; 907 908class PrivilegedElement; 909class MonitorArray; 910 911class MonitorInfo; 912 913class OffsetClosure; 914class OopMapCache; 915class InterpreterOopMap; 916class OopMapCacheEntry; 917class OSThread; 918 919typedef int (*OSThreadStartFunc)(void*); 920 921class Space; 922 923class JavaValue; 924class methodHandle; 925class JavaCallArguments; 926 927// Basic support for errors (general debug facilities not defined at this point fo the include phase) 928 929extern void basic_fatal(const char* msg); 930 931 932//---------------------------------------------------------------------------------------------------- 933// Special constants for debugging 934 935const jint badInt = -3; // generic "bad int" value 936const long badAddressVal = -2; // generic "bad address" value 937const long badOopVal = -1; // generic "bad oop" value 938const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC 939const int badHandleValue = 0xBC; // value used to zap vm handle area 940const int badResourceValue = 0xAB; // value used to zap resource area 941const int freeBlockPad = 0xBA; // value used to pad freed blocks. 942const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks. 943const intptr_t badJNIHandleVal = (intptr_t) CONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area 944const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC 945const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC 946const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation 947const int badCodeHeapFreeVal = 0xDD; // value used to zap Code heap at deallocation 948 949 950// (These must be implemented as #defines because C++ compilers are 951// not obligated to inline non-integral constants!) 952#define badAddress ((address)::badAddressVal) 953#define badOop ((oop)::badOopVal) 954#define badHeapWord (::badHeapWordVal) 955#define badJNIHandle ((oop)::badJNIHandleVal) 956 957// Default TaskQueue size is 16K (32-bit) or 128K (64-bit) 958#define TASKQUEUE_SIZE (NOT_LP64(1<<14) LP64_ONLY(1<<17)) 959 960//---------------------------------------------------------------------------------------------------- 961// Utility functions for bitfield manipulations 962 963const intptr_t AllBits = ~0; // all bits set in a word 964const intptr_t NoBits = 0; // no bits set in a word 965const jlong NoLongBits = 0; // no bits set in a long 966const intptr_t OneBit = 1; // only right_most bit set in a word 967 968// get a word with the n.th or the right-most or left-most n bits set 969// (note: #define used only so that they can be used in enum constant definitions) 970#define nth_bit(n) (n >= BitsPerWord ? 0 : OneBit << (n)) 971#define right_n_bits(n) (nth_bit(n) - 1) 972#define left_n_bits(n) (right_n_bits(n) << (n >= BitsPerWord ? 0 : (BitsPerWord - n))) 973 974// bit-operations using a mask m 975inline void set_bits (intptr_t& x, intptr_t m) { x |= m; } 976inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; } 977inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; } 978inline jlong mask_long_bits (jlong x, jlong m) { return x & m; } 979inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; } 980 981// bit-operations using the n.th bit 982inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); } 983inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); } 984inline bool is_set_nth_bit(intptr_t x, int n) { return mask_bits (x, nth_bit(n)) != NoBits; } 985 986// returns the bitfield of x starting at start_bit_no with length field_length (no sign-extension!) 987inline intptr_t bitfield(intptr_t x, int start_bit_no, int field_length) { 988 return mask_bits(x >> start_bit_no, right_n_bits(field_length)); 989} 990 991 992//---------------------------------------------------------------------------------------------------- 993// Utility functions for integers 994 995// Avoid use of global min/max macros which may cause unwanted double 996// evaluation of arguments. 997#ifdef max 998#undef max 999#endif 1000 1001#ifdef min 1002#undef min 1003#endif 1004 1005#define max(a,b) Do_not_use_max_use_MAX2_instead 1006#define min(a,b) Do_not_use_min_use_MIN2_instead 1007 1008// It is necessary to use templates here. Having normal overloaded 1009// functions does not work because it is necessary to provide both 32- 1010// and 64-bit overloaded functions, which does not work, and having 1011// explicitly-typed versions of these routines (i.e., MAX2I, MAX2L) 1012// will be even more error-prone than macros. 1013template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; } 1014template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; } 1015template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); } 1016template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); } 1017template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); } 1018template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); } 1019 1020template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; } 1021 1022// true if x is a power of 2, false otherwise 1023inline bool is_power_of_2(intptr_t x) { 1024 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits)); 1025} 1026 1027// long version of is_power_of_2 1028inline bool is_power_of_2_long(jlong x) { 1029 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits)); 1030} 1031 1032//* largest i such that 2^i <= x 1033// A negative value of 'x' will return '31' 1034inline int log2_intptr(intptr_t x) { 1035 int i = -1; 1036 uintptr_t p = 1; 1037 while (p != 0 && p <= (uintptr_t)x) { 1038 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) 1039 i++; p *= 2; 1040 } 1041 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) 1042 // (if p = 0 then overflow occurred and i = 31) 1043 return i; 1044} 1045 1046//* largest i such that 2^i <= x 1047// A negative value of 'x' will return '63' 1048inline int log2_long(jlong x) { 1049 int i = -1; 1050 julong p = 1; 1051 while (p != 0 && p <= (julong)x) { 1052 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) 1053 i++; p *= 2; 1054 } 1055 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) 1056 // (if p = 0 then overflow occurred and i = 63) 1057 return i; 1058} 1059 1060//* the argument must be exactly a power of 2 1061inline int exact_log2(intptr_t x) { 1062 #ifdef ASSERT 1063 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2"); 1064 #endif 1065 return log2_intptr(x); 1066} 1067 1068//* the argument must be exactly a power of 2 1069inline int exact_log2_long(jlong x) { 1070 #ifdef ASSERT 1071 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2"); 1072 #endif 1073 return log2_long(x); 1074} 1075 1076 1077// returns integer round-up to the nearest multiple of s (s must be a power of two) 1078inline intptr_t round_to(intptr_t x, uintx s) { 1079 #ifdef ASSERT 1080 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); 1081 #endif 1082 const uintx m = s - 1; 1083 return mask_bits(x + m, ~m); 1084} 1085 1086// returns integer round-down to the nearest multiple of s (s must be a power of two) 1087inline intptr_t round_down(intptr_t x, uintx s) { 1088 #ifdef ASSERT 1089 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); 1090 #endif 1091 const uintx m = s - 1; 1092 return mask_bits(x, ~m); 1093} 1094 1095 1096inline bool is_odd (intx x) { return x & 1; } 1097inline bool is_even(intx x) { return !is_odd(x); } 1098 1099// "to" should be greater than "from." 1100inline intx byte_size(void* from, void* to) { 1101 return (address)to - (address)from; 1102} 1103 1104//---------------------------------------------------------------------------------------------------- 1105// Avoid non-portable casts with these routines (DEPRECATED) 1106 1107// NOTE: USE Bytes class INSTEAD WHERE POSSIBLE 1108// Bytes is optimized machine-specifically and may be much faster then the portable routines below. 1109 1110// Given sequence of four bytes, build into a 32-bit word 1111// following the conventions used in class files. 1112// On the 386, this could be realized with a simple address cast. 1113// 1114 1115// This routine takes eight bytes: 1116inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1117 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 )) 1118 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 )) 1119 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 )) 1120 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 )) 1121 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 )) 1122 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 )) 1123 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 )) 1124 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 )); 1125} 1126 1127// This routine takes four bytes: 1128inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { 1129 return (( u4(c1) << 24 ) & 0xff000000) 1130 | (( u4(c2) << 16 ) & 0x00ff0000) 1131 | (( u4(c3) << 8 ) & 0x0000ff00) 1132 | (( u4(c4) << 0 ) & 0x000000ff); 1133} 1134 1135// And this one works if the four bytes are contiguous in memory: 1136inline u4 build_u4_from( u1* p ) { 1137 return build_u4_from( p[0], p[1], p[2], p[3] ); 1138} 1139 1140// Ditto for two-byte ints: 1141inline u2 build_u2_from( u1 c1, u1 c2 ) { 1142 return u2((( u2(c1) << 8 ) & 0xff00) 1143 | (( u2(c2) << 0 ) & 0x00ff)); 1144} 1145 1146// And this one works if the two bytes are contiguous in memory: 1147inline u2 build_u2_from( u1* p ) { 1148 return build_u2_from( p[0], p[1] ); 1149} 1150 1151// Ditto for floats: 1152inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { 1153 u4 u = build_u4_from( c1, c2, c3, c4 ); 1154 return *(jfloat*)&u; 1155} 1156 1157inline jfloat build_float_from( u1* p ) { 1158 u4 u = build_u4_from( p ); 1159 return *(jfloat*)&u; 1160} 1161 1162 1163// now (64-bit) longs 1164 1165inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1166 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 )) 1167 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 )) 1168 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 )) 1169 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 )) 1170 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 )) 1171 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 )) 1172 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 )) 1173 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 )); 1174} 1175 1176inline jlong build_long_from( u1* p ) { 1177 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] ); 1178} 1179 1180 1181// Doubles, too! 1182inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1183 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 ); 1184 return *(jdouble*)&u; 1185} 1186 1187inline jdouble build_double_from( u1* p ) { 1188 jlong u = build_long_from( p ); 1189 return *(jdouble*)&u; 1190} 1191 1192 1193// Portable routines to go the other way: 1194 1195inline void explode_short_to( u2 x, u1& c1, u1& c2 ) { 1196 c1 = u1(x >> 8); 1197 c2 = u1(x); 1198} 1199 1200inline void explode_short_to( u2 x, u1* p ) { 1201 explode_short_to( x, p[0], p[1]); 1202} 1203 1204inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) { 1205 c1 = u1(x >> 24); 1206 c2 = u1(x >> 16); 1207 c3 = u1(x >> 8); 1208 c4 = u1(x); 1209} 1210 1211inline void explode_int_to( u4 x, u1* p ) { 1212 explode_int_to( x, p[0], p[1], p[2], p[3]); 1213} 1214 1215 1216// Pack and extract shorts to/from ints: 1217 1218inline int extract_low_short_from_int(jint x) { 1219 return x & 0xffff; 1220} 1221 1222inline int extract_high_short_from_int(jint x) { 1223 return (x >> 16) & 0xffff; 1224} 1225 1226inline int build_int_from_shorts( jushort low, jushort high ) { 1227 return ((int)((unsigned int)high << 16) | (unsigned int)low); 1228} 1229 1230// Printf-style formatters for fixed- and variable-width types as pointers and 1231// integers. These are derived from the definitions in inttypes.h. If the platform 1232// doesn't provide appropriate definitions, they should be provided in 1233// the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp) 1234 1235#define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false") 1236 1237// Format 32-bit quantities. 1238#define INT32_FORMAT "%" PRId32 1239#define UINT32_FORMAT "%" PRIu32 1240#define INT32_FORMAT_W(width) "%" #width PRId32 1241#define UINT32_FORMAT_W(width) "%" #width PRIu32 1242 1243#define PTR32_FORMAT "0x%08" PRIx32 1244 1245// Format 64-bit quantities. 1246#define INT64_FORMAT "%" PRId64 1247#define UINT64_FORMAT "%" PRIu64 1248#define INT64_FORMAT_W(width) "%" #width PRId64 1249#define UINT64_FORMAT_W(width) "%" #width PRIu64 1250 1251#define PTR64_FORMAT "0x%016" PRIx64 1252 1253// Format jlong, if necessary 1254#ifndef JLONG_FORMAT 1255#define JLONG_FORMAT INT64_FORMAT 1256#endif 1257#ifndef JULONG_FORMAT 1258#define JULONG_FORMAT UINT64_FORMAT 1259#endif 1260 1261// Format pointers which change size between 32- and 64-bit. 1262#ifdef _LP64 1263#define INTPTR_FORMAT "0x%016" PRIxPTR 1264#define PTR_FORMAT "0x%016" PRIxPTR 1265#else // !_LP64 1266#define INTPTR_FORMAT "0x%08" PRIxPTR 1267#define PTR_FORMAT "0x%08" PRIxPTR 1268#endif // _LP64 1269 1270#define SSIZE_FORMAT "%" PRIdPTR 1271#define SIZE_FORMAT "%" PRIuPTR 1272#define SSIZE_FORMAT_W(width) "%" #width PRIdPTR 1273#define SIZE_FORMAT_W(width) "%" #width PRIuPTR 1274 1275#define INTX_FORMAT "%" PRIdPTR 1276#define UINTX_FORMAT "%" PRIuPTR 1277#define INTX_FORMAT_W(width) "%" #width PRIdPTR 1278#define UINTX_FORMAT_W(width) "%" #width PRIuPTR 1279 1280 1281// Enable zap-a-lot if in debug version. 1282 1283# ifdef ASSERT 1284# ifdef COMPILER2 1285# define ENABLE_ZAP_DEAD_LOCALS 1286#endif /* COMPILER2 */ 1287# endif /* ASSERT */ 1288 1289#define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0])) 1290 1291// Dereference vptr 1292// All C++ compilers that we know of have the vtbl pointer in the first 1293// word. If there are exceptions, this function needs to be made compiler 1294// specific. 1295static inline void* dereference_vptr(void* addr) { 1296 return *(void**)addr; 1297} 1298 1299#endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP 1300