globalDefinitions.hpp revision 12252:d9aa9adb7dd2
1323136Sdes/* 276259Sgreen * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 376259Sgreen * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 476259Sgreen * 576259Sgreen * This code is free software; you can redistribute it and/or modify it 676259Sgreen * under the terms of the GNU General Public License version 2 only, as 792555Sdes * published by the Free Software Foundation. 876259Sgreen * 976259Sgreen * This code is distributed in the hope that it will be useful, but WITHOUT 1076259Sgreen * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11162856Sdes * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12294332Sdes * version 2 for more details (a copy is included in the LICENSE file that 13106130Sdes * accompanied this code). 14162856Sdes * 15162856Sdes * You should have received a copy of the GNU General Public License version 16162856Sdes * 2 along with this work; if not, write to the Free Software Foundation, 17162856Sdes * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1876259Sgreen * 19162856Sdes * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20162856Sdes * or visit www.oracle.com if you need additional information or have any 21162856Sdes * questions. 2276259Sgreen * 2376259Sgreen */ 24162856Sdes 25162856Sdes#ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP 26162856Sdes#define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP 27162856Sdes 28162856Sdes#ifndef __STDC_FORMAT_MACROS 29162856Sdes#define __STDC_FORMAT_MACROS 30162856Sdes#endif 31162856Sdes 32162856Sdes#ifdef TARGET_COMPILER_gcc 3376259Sgreen# include "utilities/globalDefinitions_gcc.hpp" 3476259Sgreen#endif 3576259Sgreen#ifdef TARGET_COMPILER_visCPP 36294332Sdes# include "utilities/globalDefinitions_visCPP.hpp" 37294332Sdes#endif 38162856Sdes#ifdef TARGET_COMPILER_sparcWorks 3992555Sdes# include "utilities/globalDefinitions_sparcWorks.hpp" 4092555Sdes#endif 4192555Sdes#ifdef TARGET_COMPILER_xlc 4292555Sdes# include "utilities/globalDefinitions_xlc.hpp" 4392555Sdes#endif 4476259Sgreen 4576259Sgreen#ifndef NOINLINE 4692555Sdes#define NOINLINE 47147005Sdes#endif 48294332Sdes#ifndef ALWAYSINLINE 49294332Sdes#define ALWAYSINLINE inline 5076259Sgreen#endif 5198941Sdes#ifndef PRAGMA_DIAG_PUSH 5298941Sdes#define PRAGMA_DIAG_PUSH 5398941Sdes#endif 5476259Sgreen#ifndef PRAGMA_DIAG_POP 5592555Sdes#define PRAGMA_DIAG_POP 5676259Sgreen#endif 57221420Sdes#ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED 58221420Sdes#define PRAGMA_FORMAT_NONLITERAL_IGNORED 59221420Sdes#endif 60221420Sdes#ifndef PRAGMA_FORMAT_IGNORED 61261320Sdes#define PRAGMA_FORMAT_IGNORED 6292555Sdes#endif 63296633Sdes#ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL 64294328Sdes#define PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL 6592555Sdes#endif 66147005Sdes#ifndef PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL 67147005Sdes#define PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL 6876259Sgreen#endif 6976259Sgreen#ifndef ATTRIBUTE_PRINTF 7076259Sgreen#define ATTRIBUTE_PRINTF(fmt, vargs) 7176259Sgreen#endif 7276259Sgreen#ifndef ATTRIBUTE_SCANF 7376259Sgreen#define ATTRIBUTE_SCANF(fmt, vargs) 7476259Sgreen#endif 7576259Sgreen 7676259Sgreen#include "utilities/macros.hpp" 7776259Sgreen 78162856Sdes// This file holds all globally used constants & types, class (forward) 7976259Sgreen// declarations and a few frequently used utility functions. 8076259Sgreen 81294332Sdes//---------------------------------------------------------------------------------------------------- 82294332Sdes// Constants 8376259Sgreen 8476259Sgreenconst int LogBytesPerShort = 1; 8576259Sgreenconst int LogBytesPerInt = 2; 8676259Sgreen#ifdef _LP64 8776259Sgreenconst int LogBytesPerWord = 3; 8876259Sgreen#else 8976259Sgreenconst int LogBytesPerWord = 2; 9076259Sgreen#endif 9176259Sgreenconst int LogBytesPerLong = 3; 9276259Sgreen 9376259Sgreenconst int BytesPerShort = 1 << LogBytesPerShort; 9476259Sgreenconst int BytesPerInt = 1 << LogBytesPerInt; 9576259Sgreenconst int BytesPerWord = 1 << LogBytesPerWord; 9676259Sgreenconst int BytesPerLong = 1 << LogBytesPerLong; 9792555Sdes 98294336Sdesconst int LogBitsPerByte = 3; 9976259Sgreenconst int LogBitsPerShort = LogBitsPerByte + LogBytesPerShort; 10076259Sgreenconst int LogBitsPerInt = LogBitsPerByte + LogBytesPerInt; 10176259Sgreenconst int LogBitsPerWord = LogBitsPerByte + LogBytesPerWord; 10276259Sgreenconst int LogBitsPerLong = LogBitsPerByte + LogBytesPerLong; 10376259Sgreen 104294332Sdesconst int BitsPerByte = 1 << LogBitsPerByte; 10576259Sgreenconst int BitsPerShort = 1 << LogBitsPerShort; 10676259Sgreenconst int BitsPerInt = 1 << LogBitsPerInt; 10776259Sgreenconst int BitsPerWord = 1 << LogBitsPerWord; 10876259Sgreenconst int BitsPerLong = 1 << LogBitsPerLong; 10976259Sgreen 11076259Sgreenconst int WordAlignmentMask = (1 << LogBytesPerWord) - 1; 11176259Sgreenconst int LongAlignmentMask = (1 << LogBytesPerLong) - 1; 112294332Sdes 113294332Sdesconst int WordsPerLong = 2; // Number of stack entries for longs 11492555Sdes 11576259Sgreenconst int oopSize = sizeof(char*); // Full-width oop 11676259Sgreenextern int heapOopSize; // Oop within a java object 11798941Sdesconst int wordSize = sizeof(char*); 11876259Sgreenconst int longSize = sizeof(jlong); 11976259Sgreenconst int jintSize = sizeof(jint); 12076259Sgreenconst int size_tSize = sizeof(size_t); 12176259Sgreen 12276259Sgreenconst int BytesPerOop = BytesPerWord; // Full-width oop 123126277Sdes 12476259Sgreenextern int LogBytesPerHeapOop; // Oop within a java object 12576259Sgreenextern int LogBitsPerHeapOop; 12698941Sdesextern int BytesPerHeapOop; 127126277Sdesextern int BitsPerHeapOop; 12898941Sdes 12976259Sgreenconst int BitsPerJavaInteger = 32; 13076259Sgreenconst int BitsPerJavaLong = 64; 13192555Sdesconst int BitsPerSize_t = size_tSize * BitsPerByte; 13276259Sgreen 13376259Sgreen// Size of a char[] needed to represent a jint as a string in decimal. 13498941Sdesconst int jintAsStringSize = 12; 13576259Sgreen 13698941Sdes// In fact this should be 137106130Sdes// log2_intptr(sizeof(class JavaThread)) - log2_intptr(64); 13876259Sgreen// see os::set_memory_serialize_page() 13976259Sgreen#ifdef _LP64 14098941Sdesconst int SerializePageShiftCount = 4; 14176259Sgreen#else 14276259Sgreenconst int SerializePageShiftCount = 3; 14376259Sgreen#endif 14476259Sgreen 14576259Sgreen// An opaque struct of heap-word width, so that HeapWord* can be a generic 14698941Sdes// pointer into the heap. We require that object sizes be measured in 14798941Sdes// units of heap words, so that that 14898941Sdes// HeapWord* hw; 14976259Sgreen// hw += oop(hw)->foo(); 15076259Sgreen// works, where foo is a method (like size or scavenge) that returns the 15176259Sgreen// object size. 15276259Sgreenclass HeapWord { 15376259Sgreen friend class VMStructs; 15476259Sgreen private: 15576259Sgreen char* i; 15676259Sgreen#ifndef PRODUCT 15792555Sdes public: 15876259Sgreen char* value() { return i; } 15976259Sgreen#endif 16076259Sgreen}; 16176259Sgreen 16276259Sgreen// Analogous opaque struct for metadata allocated from 16376259Sgreen// metaspaces. 16476259Sgreenclass MetaWord { 16576259Sgreen private: 16676259Sgreen char* i; 16776259Sgreen}; 16876259Sgreen 16976259Sgreen// HeapWordSize must be 2^LogHeapWordSize. 17076259Sgreenconst int HeapWordSize = sizeof(HeapWord); 17176259Sgreen#ifdef _LP64 17276259Sgreenconst int LogHeapWordSize = 3; 17376259Sgreen#else 17476259Sgreenconst int LogHeapWordSize = 2; 17576259Sgreen#endif 17676259Sgreenconst int HeapWordsPerLong = BytesPerLong / HeapWordSize; 17776259Sgreenconst int LogHeapWordsPerLong = LogBytesPerLong - LogHeapWordSize; 17876259Sgreen 17992555Sdes// The larger HeapWordSize for 64bit requires larger heaps 18076259Sgreen// for the same application running in 64bit. See bug 4967770. 18176259Sgreen// The minimum alignment to a heap word size is done. Other 18276259Sgreen// parts of the memory system may require additional alignment 18376259Sgreen// and are responsible for those alignments. 18476259Sgreen#ifdef _LP64 18576259Sgreen#define ScaleForWordSize(x) align_size_down_((x) * 13 / 10, HeapWordSize) 18676259Sgreen#else 18776259Sgreen#define ScaleForWordSize(x) (x) 18876259Sgreen#endif 18976259Sgreen 190294328Sdes// The minimum number of native machine words necessary to contain "byte_size" 191294332Sdes// bytes. 19292555Sdesinline size_t heap_word_size(size_t byte_size) { 19376259Sgreen return (byte_size + (HeapWordSize-1)) >> LogHeapWordSize; 194294332Sdes} 195294332Sdes 196294332Sdes//------------------------------------------- 197294332Sdes// Constant for jlong (standardized by C++11) 19876259Sgreen 19976259Sgreen// Build a 64bit integer constant 200294332Sdes#define CONST64(x) (x ## LL) 201294332Sdes#define UCONST64(x) (x ## ULL) 202294332Sdes 203294332Sdesconst jlong min_jlong = CONST64(0x8000000000000000); 204294332Sdesconst jlong max_jlong = CONST64(0x7fffffffffffffff); 205294332Sdes 20676259Sgreenconst size_t K = 1024; 207294332Sdesconst size_t M = K*K; 208294332Sdesconst size_t G = M*K; 209294332Sdesconst size_t HWperKB = K / sizeof(HeapWord); 210294332Sdes 211294332Sdes// Constants for converting from a base unit to milli-base units. For 21292555Sdes// example from seconds to milliseconds and microseconds 213294332Sdes 21492555Sdesconst int MILLIUNITS = 1000; // milli units per base unit 21576259Sgreenconst int MICROUNITS = 1000000; // micro units per base unit 216294332Sdesconst int NANOUNITS = 1000000000; // nano units per base unit 217294332Sdes 218294332Sdesconst jlong NANOSECS_PER_SEC = CONST64(1000000000); 219294332Sdesconst jint NANOSECS_PER_MILLISEC = 1000000; 220294332Sdes 221294332Sdesinline const char* proper_unit_for_byte_size(size_t s) { 222294332Sdes#ifdef _LP64 223294332Sdes if (s >= 10*G) { 224294332Sdes return "G"; 225294332Sdes } 226294332Sdes#endif 227294332Sdes if (s >= 10*M) { 228294332Sdes return "M"; 229294332Sdes } else if (s >= 10*K) { 23076259Sgreen return "K"; 231294332Sdes } else { 23276259Sgreen return "B"; 23392555Sdes } 23492555Sdes} 235294328Sdes 23692555Sdestemplate <class T> 23792555Sdesinline T byte_size_in_proper_unit(T s) { 238294332Sdes#ifdef _LP64 23992555Sdes if (s >= 10*G) { 240294332Sdes return (T)(s/G); 241294332Sdes } 242294332Sdes#endif 243294332Sdes if (s >= 10*M) { 244294332Sdes return (T)(s/M); 245294332Sdes } else if (s >= 10*K) { 24692555Sdes return (T)(s/K); 24792555Sdes } else { 24892555Sdes return s; 24992555Sdes } 25092555Sdes} 25192555Sdes 25292555Sdesinline const char* exact_unit_for_byte_size(size_t s) { 25392555Sdes#ifdef _LP64 25492555Sdes if (s >= G && (s % G) == 0) { 25592555Sdes return "G"; 25692555Sdes } 25792555Sdes#endif 25892555Sdes if (s >= M && (s % M) == 0) { 25992555Sdes return "M"; 26092555Sdes } 26192555Sdes if (s >= K && (s % K) == 0) { 26292555Sdes return "K"; 26392555Sdes } 264294332Sdes return "B"; 26592555Sdes} 26692555Sdes 267294328Sdesinline size_t byte_size_in_exact_unit(size_t s) { 268294332Sdes#ifdef _LP64 26992555Sdes if (s >= G && (s % G) == 0) { 27092555Sdes return s / G; 271296633Sdes } 272296633Sdes#endif 273296633Sdes if (s >= M && (s % M) == 0) { 274296633Sdes return s / M; 275296633Sdes } 276296633Sdes if (s >= K && (s % K) == 0) { 277296633Sdes return s / K; 278296633Sdes } 279296633Sdes return s; 280296633Sdes} 281296633Sdes 282296633Sdes//---------------------------------------------------------------------------------------------------- 283296633Sdes// VM type definitions 284296633Sdes 285296633Sdes// intx and uintx are the 'extended' int and 'extended' unsigned int types; 286296633Sdes// they are 32bit wide on a 32-bit platform, and 64bit wide on a 64bit platform. 287296633Sdes 288296633Sdestypedef intptr_t intx; 289296633Sdestypedef uintptr_t uintx; 290296633Sdes 291296633Sdesconst intx min_intx = (intx)1 << (sizeof(intx)*BitsPerByte-1); 292296633Sdesconst intx max_intx = (uintx)min_intx - 1; 293296633Sdesconst uintx max_uintx = (uintx)-1; 294296633Sdes 295296633Sdes// Table of values: 296296633Sdes// sizeof intx 4 8 297294332Sdes// min_intx 0x80000000 0x8000000000000000 298294332Sdes// max_intx 0x7FFFFFFF 0x7FFFFFFFFFFFFFFF 299294332Sdes// max_uintx 0xFFFFFFFF 0xFFFFFFFFFFFFFFFF 300294332Sdes 301294332Sdestypedef unsigned int uint; NEEDS_CLEANUP 302294328Sdes 303294332Sdes 304294332Sdes//---------------------------------------------------------------------------------------------------- 305323129Sdes// Java type definitions 306323129Sdes 307323129Sdes// All kinds of 'plain' byte addresses 308294332Sdestypedef signed char s_char; 309294332Sdestypedef unsigned char u_char; 310294332Sdestypedef u_char* address; 311294332Sdestypedef uintptr_t address_word; // unsigned integer which will hold a pointer 312294332Sdes // except for some implementations of a C++ 313294328Sdes // linkage pointer to function. Should never 314294332Sdes // need one of those to be placed in this 315294332Sdes // type anyway. 316294332Sdes 317294332Sdes// Utility functions to "portably" (?) bit twiddle pointers 318294332Sdes// Where portable means keep ANSI C++ compilers quiet 319294332Sdes 320294332Sdesinline address set_address_bits(address x, int m) { return address(intptr_t(x) | m); } 32192555Sdesinline address clear_address_bits(address x, int m) { return address(intptr_t(x) & ~m); } 32292555Sdes 32392555Sdes// Utility functions to "portably" make cast to/from function pointers. 324323136Sdes 32592555Sdesinline address_word mask_address_bits(address x, int m) { return address_word(x) & m; } 326296633Sdesinline address_word castable_address(address x) { return address_word(x) ; } 327323136Sdesinline address_word castable_address(void* x) { return address_word(x) ; } 328147005Sdes 329323136Sdes// Pointer subtraction. 330323136Sdes// The idea here is to avoid ptrdiff_t, which is signed and so doesn't have 331323136Sdes// the range we might need to find differences from one end of the heap 332147005Sdes// to the other. 333323136Sdes// A typical use might be: 334296633Sdes// if (pointer_delta(end(), top()) >= size) { 335323136Sdes// // enough room for an object of size 336294332Sdes// ... 33776259Sgreen// and then additions like 338294336Sdes// ... top() + size ... 33976259Sgreen// are safe because we know that top() is at least size below end(). 34076259Sgreeninline size_t pointer_delta(const volatile void* left, 341296633Sdes const volatile void* right, 342296633Sdes size_t element_size) { 343296633Sdes return (((uintptr_t) left) - ((uintptr_t) right)) / element_size; 344296633Sdes} 345296633Sdes 346296633Sdes// A version specialized for HeapWord*'s. 347296633Sdesinline size_t pointer_delta(const HeapWord* left, const HeapWord* right) { 348296633Sdes return pointer_delta(left, right, sizeof(HeapWord)); 349296633Sdes} 350296633Sdes// A version specialized for MetaWord*'s. 351296633Sdesinline size_t pointer_delta(const MetaWord* left, const MetaWord* right) { 352296633Sdes return pointer_delta(left, right, sizeof(MetaWord)); 353296633Sdes} 354296633Sdes 355296633Sdes// 356296633Sdes// ANSI C++ does not allow casting from one pointer type to a function pointer 357296633Sdes// directly without at best a warning. This macro accomplishes it silently 358296633Sdes// In every case that is present at this point the value be cast is a pointer 35992555Sdes// to a C linkage function. In some case the type used for the cast reflects 36076259Sgreen// that linkage and a picky compiler would not complain. In other cases because 36176259Sgreen// there is no convenient place to place a typedef with extern C linkage (i.e 36276259Sgreen// a platform dependent header file) it doesn't. At this point no compiler seems 36376259Sgreen// picky enough to catch these instances (which are few). It is possible that 36476259Sgreen// using templates could fix these for all cases. This use of templates is likely 36576259Sgreen// so far from the middle of the road that it is likely to be problematic in 36692555Sdes// many C++ compilers. 36776259Sgreen// 36892555Sdes#define CAST_TO_FN_PTR(func_type, value) (reinterpret_cast<func_type>(value)) 36976259Sgreen#define CAST_FROM_FN_PTR(new_type, func_ptr) ((new_type)((address_word)(func_ptr))) 370294332Sdes 371294332Sdes// Unsigned byte types for os and stream.hpp 372294332Sdes 373294332Sdes// Unsigned one, two, four and eigth byte quantities used for describing 37476259Sgreen// the .class file format. See JVM book chapter 4. 375124211Sdes 37676259Sgreentypedef jubyte u1; 37776259Sgreentypedef jushort u2; 37876259Sgreentypedef juint u4; 37976259Sgreentypedef julong u8; 380137019Sdes 381137019Sdesconst jubyte max_jubyte = (jubyte)-1; // 0xFF largest jubyte 38276259Sgreenconst jushort max_jushort = (jushort)-1; // 0xFFFF largest jushort 38376259Sgreenconst juint max_juint = (juint)-1; // 0xFFFFFFFF largest juint 38476259Sgreenconst julong max_julong = (julong)-1; // 0xFF....FF largest julong 38576259Sgreen 38676259Sgreentypedef jbyte s1; 38776259Sgreentypedef jshort s2; 38876259Sgreentypedef jint s4; 38976259Sgreentypedef jlong s8; 39076259Sgreen 39176259Sgreenconst jbyte min_jbyte = -(1 << 7); // smallest jbyte 39276259Sgreenconst jbyte max_jbyte = (1 << 7) - 1; // largest jbyte 39376259Sgreenconst jshort min_jshort = -(1 << 15); // smallest jshort 39492555Sdesconst jshort max_jshort = (1 << 15) - 1; // largest jshort 39592555Sdes 39676259Sgreenconst jint min_jint = (jint)1 << (sizeof(jint)*BitsPerByte-1); // 0x80000000 == smallest jint 397106130Sdesconst jint max_jint = (juint)min_jint - 1; // 0x7FFFFFFF == largest jint 39876259Sgreen 39976259Sgreen//---------------------------------------------------------------------------------------------------- 40076259Sgreen// JVM spec restrictions 40176259Sgreen 40276259Sgreenconst int max_method_code_size = 64*K - 1; // JVM spec, 2nd ed. section 4.8.1 (p.134) 40376259Sgreen 40476259Sgreen// Default ProtectionDomainCacheSize values 405255767Sdes 40676259Sgreenconst int defaultProtectionDomainCacheSize = NOT_LP64(137) LP64_ONLY(2017); 40776259Sgreen 40876259Sgreen//---------------------------------------------------------------------------------------------------- 40976259Sgreen// Default and minimum StringTableSize values 41076259Sgreen 41176259Sgreenconst int defaultStringTableSize = NOT_LP64(1009) LP64_ONLY(60013); 41276259Sgreenconst int minimumStringTableSize = 1009; 41376259Sgreen 41476259Sgreenconst int defaultSymbolTableSize = 20011; 415296633Sdesconst int minimumSymbolTableSize = 1009; 41676259Sgreen 41776259Sgreen 41876259Sgreen//---------------------------------------------------------------------------------------------------- 41976259Sgreen// HotSwap - for JVMTI aka Class File Replacement and PopFrame 42076259Sgreen// 42176259Sgreen// Determines whether on-the-fly class replacement and frame popping are enabled. 42276259Sgreen 42376259Sgreen#define HOTSWAP 42476259Sgreen 42592555Sdes//---------------------------------------------------------------------------------------------------- 42676259Sgreen// Object alignment, in units of HeapWords. 42776259Sgreen// 42876259Sgreen// Minimum is max(BytesPerLong, BytesPerDouble, BytesPerOop) / HeapWordSize, so jlong, jdouble and 42976259Sgreen// reference fields can be naturally aligned. 43076259Sgreen 43176259Sgreenextern int MinObjAlignment; 43276259Sgreenextern int MinObjAlignmentInBytes; 43376259Sgreenextern int MinObjAlignmentInBytesMask; 43492555Sdes 43576259Sgreenextern int LogMinObjAlignment; 43676259Sgreenextern int LogMinObjAlignmentInBytes; 43776259Sgreen 43876259Sgreenconst int LogKlassAlignmentInBytes = 3; 43976259Sgreenconst int LogKlassAlignment = LogKlassAlignmentInBytes - LogHeapWordSize; 440255767Sdesconst int KlassAlignmentInBytes = 1 << LogKlassAlignmentInBytes; 441255767Sdesconst int KlassAlignment = KlassAlignmentInBytes / HeapWordSize; 44276259Sgreen 443255767Sdes// Maximal size of heap where unscaled compression can be used. Also upper bound 44476259Sgreen// for heap placement: 4GB. 44592555Sdesconst uint64_t UnscaledOopHeapMax = (uint64_t(max_juint) + 1); 446294332Sdes// Maximal size of heap where compressed oops can be used. Also upper bound for heap 447294332Sdes// placement for zero based compression algorithm: UnscaledOopHeapMax << LogMinObjAlignmentInBytes. 448294332Sdesextern uint64_t OopEncodingHeapMax; 449294332Sdes 450294332Sdes// Maximal size of compressed class space. Above this limit compression is not possible. 45176259Sgreen// Also upper bound for placement of zero based class space. (Class space is further limited 45276259Sgreen// to be < 3G, see arguments.cpp.) 45376259Sgreenconst uint64_t KlassEncodingMetaspaceMax = (uint64_t(max_juint) + 1) << LogKlassAlignmentInBytes; 45476259Sgreen 45576259Sgreen// Machine dependent stuff 45692555Sdes 45776259Sgreen// The maximum size of the code cache. Can be overridden by targets. 45876259Sgreen#define CODE_CACHE_SIZE_LIMIT (2*G) 45976259Sgreen// Allow targets to reduce the default size of the code cache. 46076259Sgreen#define CODE_CACHE_DEFAULT_LIMIT CODE_CACHE_SIZE_LIMIT 46176259Sgreen 46276259Sgreen#include CPU_HEADER(globalDefinitions) 46376259Sgreen 46476259Sgreen// To assure the IRIW property on processors that are not multiple copy 46592555Sdes// atomic, sync instructions must be issued between volatile reads to 46676259Sgreen// assure their ordering, instead of after volatile stores. 46776259Sgreen// (See "A Tutorial Introduction to the ARM and POWER Relaxed Memory Models" 468106130Sdes// by Luc Maranget, Susmit Sarkar and Peter Sewell, INRIA/Cambridge) 46976259Sgreen#ifdef CPU_NOT_MULTIPLE_COPY_ATOMIC 47076259Sgreenconst bool support_IRIW_for_not_multiple_copy_atomic_cpu = true; 47192555Sdes#else 47276259Sgreenconst bool support_IRIW_for_not_multiple_copy_atomic_cpu = false; 47376259Sgreen#endif 47476259Sgreen 47576259Sgreen// The byte alignment to be used by Arena::Amalloc. See bugid 4169348. 47692555Sdes// Note: this value must be a power of 2 47776259Sgreen 47876259Sgreen#define ARENA_AMALLOC_ALIGNMENT (2*BytesPerWord) 479149753Sdes 48092555Sdes// Signed variants of alignment helpers. There are two versions of each, a macro 48192555Sdes// for use in places like enum definitions that require compile-time constant 48276259Sgreen// expressions and a function for all other places so as to get type checking. 48376259Sgreen 48476259Sgreen#define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1)) 485157019Sdes 486157019Sdesinline bool is_size_aligned(size_t size, size_t alignment) { 487157019Sdes return align_size_up_(size, alignment) == size; 488157019Sdes} 489157019Sdes 490157019Sdesinline bool is_ptr_aligned(void* ptr, size_t alignment) { 491157019Sdes return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr; 492157019Sdes} 493157019Sdes 494157019Sdesinline intptr_t align_size_up(intptr_t size, intptr_t alignment) { 495157019Sdes return align_size_up_(size, alignment); 496157019Sdes} 49792555Sdes 498149753Sdes#define align_size_down_(size, alignment) ((size) & ~((alignment) - 1)) 499149753Sdes 500149753Sdesinline intptr_t align_size_down(intptr_t size, intptr_t alignment) { 501149753Sdes return align_size_down_(size, alignment); 502149753Sdes} 503149753Sdes 504149753Sdes#define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment))) 505149753Sdes 50676259Sgreeninline void* align_ptr_up(const void* ptr, size_t alignment) { 507149753Sdes return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment); 508149753Sdes} 50976259Sgreen 51076259Sgreeninline void* align_ptr_down(void* ptr, size_t alignment) { 51176259Sgreen return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment); 51276259Sgreen} 51376259Sgreen 51476259Sgreeninline volatile void* align_ptr_down(volatile void* ptr, size_t alignment) { 51576259Sgreen return (volatile void*)align_size_down((intptr_t)ptr, (intptr_t)alignment); 51676259Sgreen} 51776259Sgreen 518294332Sdes// Align metaspace objects by rounding up to natural word boundary 519294332Sdes 520294332Sdesinline intptr_t align_metadata_size(intptr_t size) { 521294332Sdes return align_size_up(size, 1); 52292555Sdes} 52392555Sdes 524294332Sdes// Align objects in the Java Heap by rounding up their size, in HeapWord units. 52592555Sdes// Since the size is given in words this is somewhat of a nop, but 526294332Sdes// distinguishes it from align_object_size. 52792555Sdesinline intptr_t align_object_size(intptr_t size) { 52892555Sdes return align_size_up(size, MinObjAlignment); 52992555Sdes} 53092555Sdes 53192555Sdesinline bool is_object_aligned(intptr_t addr) { 53292555Sdes return addr == align_object_size(addr); 53392555Sdes} 53492555Sdes 53592555Sdes// Pad out certain offsets to jlong alignment, in HeapWord units. 53692555Sdes 53792555Sdesinline intptr_t align_object_offset(intptr_t offset) { 538294336Sdes return align_size_up(offset, HeapWordsPerLong); 53992555Sdes} 54092555Sdes 54192555Sdes// Align down with a lower bound. If the aligning results in 0, return 'alignment'. 542149753Sdes 543149753Sdesinline size_t align_size_down_bounded(size_t size, size_t alignment) { 544149753Sdes size_t aligned_size = align_size_down_(size, alignment); 545149753Sdes return aligned_size > 0 ? aligned_size : alignment; 546149753Sdes} 547149753Sdes 54876259Sgreen// Clamp an address to be within a specific page 54976259Sgreen// 1. If addr is on the page it is returned as is 55076259Sgreen// 2. If addr is above the page_address the start of the *next* page will be returned 55176259Sgreen// 3. Otherwise, if addr is below the page_address the start of the page will be returned 55292555Sdesinline address clamp_address_in_page(address addr, address page_address, intptr_t page_size) { 553294332Sdes if (align_size_down(intptr_t(addr), page_size) == align_size_down(intptr_t(page_address), page_size)) { 55492555Sdes // address is in the specified page, just return it as is 55592555Sdes return addr; 55692555Sdes } else if (addr > page_address) { 55776259Sgreen // address is above specified page, return start of next page 55876259Sgreen return (address)align_size_down(intptr_t(page_address), page_size) + page_size; 55976259Sgreen } else { 56076259Sgreen // address is below specified page, return start of page 56192555Sdes return (address)align_size_down(intptr_t(page_address), page_size); 56276259Sgreen } 56376259Sgreen} 564106130Sdes 565149753Sdes 56676259Sgreen// The expected size in bytes of a cache line, used to pad data structures. 56776259Sgreen#ifndef DEFAULT_CACHE_LINE_SIZE 56876259Sgreen #define DEFAULT_CACHE_LINE_SIZE 64 56976259Sgreen#endif 57076259Sgreen 571137019Sdes 572149753Sdes//---------------------------------------------------------------------------------------------------- 57376259Sgreen// Utility macros for compilers 57476259Sgreen// used to silence compiler warnings 57576259Sgreen 57676259Sgreen#define Unused_Variable(var) var 57776259Sgreen 57876259Sgreen 57976259Sgreen//---------------------------------------------------------------------------------------------------- 58076259Sgreen// Miscellaneous 58176259Sgreen 58276259Sgreen// 6302670 Eliminate Hotspot __fabsf dependency 58376259Sgreen// All fabs() callers should call this function instead, which will implicitly 58476259Sgreen// convert the operand to double, avoiding a dependency on __fabsf which 58576259Sgreen// doesn't exist in early versions of Solaris 8. 58676259Sgreeninline double fabsd(double value) { 58776259Sgreen return fabs(value); 588294328Sdes} 58976259Sgreen 59092555Sdes// Returns numerator/denominator as percentage value from 0 to 100. If denominator 59176259Sgreen// is zero, return 0.0. 59276259Sgreentemplate<typename T> 593294328Sdesinline double percent_of(T numerator, T denominator) { 59476259Sgreen return denominator != 0 ? (double)numerator / denominator * 100.0 : 0.0; 59576259Sgreen} 59676259Sgreen 59776259Sgreen//---------------------------------------------------------------------------------------------------- 59876259Sgreen// Special casts 59976259Sgreen// Cast floats into same-size integers and vice-versa w/o changing bit-pattern 60076259Sgreentypedef union { 60176259Sgreen jfloat f; 60292555Sdes jint i; 60376259Sgreen} FloatIntConv; 60476259Sgreen 605106130Sdestypedef union { 60676259Sgreen jdouble d; 607106130Sdes jlong l; 60876259Sgreen julong ul; 60976259Sgreen} DoubleLongConv; 61076259Sgreen 61198675Sdesinline jint jint_cast (jfloat x) { return ((FloatIntConv*)&x)->i; } 61276259Sgreeninline jfloat jfloat_cast (jint x) { return ((FloatIntConv*)&x)->f; } 61376259Sgreen 61476259Sgreeninline jlong jlong_cast (jdouble x) { return ((DoubleLongConv*)&x)->l; } 61576259Sgreeninline julong julong_cast (jdouble x) { return ((DoubleLongConv*)&x)->ul; } 61676259Sgreeninline jdouble jdouble_cast (jlong x) { return ((DoubleLongConv*)&x)->d; } 61776259Sgreen 61876259Sgreeninline jint low (jlong value) { return jint(value); } 61976259Sgreeninline jint high(jlong value) { return jint(value >> 32); } 62076259Sgreen 62176259Sgreen// the fancy casts are a hopefully portable way 62276259Sgreen// to do unsigned 32 to 64 bit type conversion 623226046Sdesinline void set_low (jlong* value, jint low ) { *value &= (jlong)0xffffffff << 32; 62476259Sgreen *value |= (jlong)(julong)(juint)low; } 625162856Sdes 626162856Sdesinline void set_high(jlong* value, jint high) { *value &= (jlong)(julong)(juint)0xffffffff; 627162856Sdes *value |= (jlong)high << 32; } 628162856Sdes 62976259Sgreeninline jlong jlong_from(jint h, jint l) { 63076259Sgreen jlong result = 0; // initialization to avoid warning 631181111Sdes set_high(&result, h); 63276259Sgreen set_low(&result, l); 63376259Sgreen return result; 63476259Sgreen} 63576259Sgreen 63676259Sgreenunion jlong_accessor { 63776259Sgreen jint words[2]; 63876259Sgreen jlong long_value; 63976259Sgreen}; 64076259Sgreen 641255767Sdesvoid basic_types_init(); // cannot define here; uses assert 642255767Sdes 64376259Sgreen 64498675Sdes// NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java 64576259Sgreenenum BasicType { 64676259Sgreen T_BOOLEAN = 4, 64776259Sgreen T_CHAR = 5, 64876259Sgreen T_FLOAT = 6, 64998675Sdes T_DOUBLE = 7, 65076259Sgreen T_BYTE = 8, 65176259Sgreen T_SHORT = 9, 65276259Sgreen T_INT = 10, 65376259Sgreen T_LONG = 11, 65492555Sdes T_OBJECT = 12, 65592555Sdes T_ARRAY = 13, 65676259Sgreen T_VOID = 14, 65792555Sdes T_ADDRESS = 15, 65892555Sdes T_NARROWOOP = 16, 65976259Sgreen T_METADATA = 17, 66092555Sdes T_NARROWKLASS = 18, 66192555Sdes T_CONFLICT = 19, // for stack value type with conflicting contents 662261320Sdes T_ILLEGAL = 99 66392555Sdes}; 66492555Sdes 66592555Sdesinline bool is_java_primitive(BasicType t) { 66692555Sdes return T_BOOLEAN <= t && t <= T_LONG; 66776259Sgreen} 66876259Sgreen 66976259Sgreeninline bool is_subword_type(BasicType t) { 67076259Sgreen // these guys are processed exactly like T_INT in calling sequences: 67176259Sgreen return (t == T_BOOLEAN || t == T_CHAR || t == T_BYTE || t == T_SHORT); 67292555Sdes} 67392555Sdes 67492555Sdesinline bool is_signed_subword_type(BasicType t) { 675106130Sdes return (t == T_BYTE || t == T_SHORT); 67692555Sdes} 67792555Sdes 67892555Sdes// Convert a char from a classfile signature to a BasicType 679294332Sdesinline BasicType char2type(char c) { 68092555Sdes switch( c ) { 68192555Sdes case 'B': return T_BYTE; 68292555Sdes case 'C': return T_CHAR; 68376259Sgreen case 'D': return T_DOUBLE; 68476259Sgreen case 'F': return T_FLOAT; 685192595Sdes case 'I': return T_INT; 686296633Sdes case 'J': return T_LONG; 687192595Sdes case 'S': return T_SHORT; 68892555Sdes case 'Z': return T_BOOLEAN; 68992555Sdes case 'V': return T_VOID; 69076259Sgreen case 'L': return T_OBJECT; 69176259Sgreen case '[': return T_ARRAY; 69276259Sgreen } 69376259Sgreen return T_ILLEGAL; 69476259Sgreen} 69592555Sdes 696215116Sdesextern char type2char_tab[T_CONFLICT+1]; // Map a BasicType to a jchar 697215116Sdesinline char type2char(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2char_tab[t] : 0; } 698215116Sdesextern int type2size[T_CONFLICT+1]; // Map BasicType to result stack elements 699215116Sdesextern const char* type2name_tab[T_CONFLICT+1]; // Map a BasicType to a jchar 70076259Sgreeninline const char* type2name(BasicType t) { return (uint)t < T_CONFLICT+1 ? type2name_tab[t] : NULL; } 70192555Sdesextern BasicType name2type(const char* name); 70292555Sdes 70392555Sdes// Auxiliary math routines 704296633Sdes// least common multiple 705124211Sdesextern size_t lcm(size_t a, size_t b); 70698941Sdes 70776259Sgreen 70876259Sgreen// NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/runtime/BasicType.java 709157019Sdesenum BasicTypeSize { 710157019Sdes T_BOOLEAN_size = 1, 711157019Sdes T_CHAR_size = 1, 71292555Sdes T_FLOAT_size = 1, 71376259Sgreen T_DOUBLE_size = 2, 71476259Sgreen T_BYTE_size = 1, 715296633Sdes T_SHORT_size = 1, 71692555Sdes T_INT_size = 1, 717147005Sdes T_LONG_size = 2, 718147005Sdes T_OBJECT_size = 1, 719147005Sdes T_ARRAY_size = 1, 720296633Sdes T_NARROWOOP_size = 1, 721296633Sdes T_NARROWKLASS_size = 1, 722296633Sdes T_VOID_size = 0 72392555Sdes}; 72492555Sdes 725192595Sdes 72692555Sdes// maps a BasicType to its instance field storage type: 72792555Sdes// all sub-word integral types are widened to T_INT 72892555Sdesextern BasicType type2field[T_CONFLICT+1]; 72992555Sdesextern BasicType type2wfield[T_CONFLICT+1]; 73092555Sdes 731106130Sdes 732106130Sdes// size in bytes 733106130Sdesenum ArrayElementSize { 73476259Sgreen T_BOOLEAN_aelem_bytes = 1, 735106130Sdes T_CHAR_aelem_bytes = 2, 73692555Sdes T_FLOAT_aelem_bytes = 4, 73792555Sdes T_DOUBLE_aelem_bytes = 8, 73892555Sdes T_BYTE_aelem_bytes = 1, 73992555Sdes T_SHORT_aelem_bytes = 2, 74092555Sdes T_INT_aelem_bytes = 4, 74192555Sdes T_LONG_aelem_bytes = 8, 74292555Sdes#ifdef _LP64 74392555Sdes T_OBJECT_aelem_bytes = 8, 74492555Sdes T_ARRAY_aelem_bytes = 8, 74592555Sdes#else 74692555Sdes T_OBJECT_aelem_bytes = 4, 74792555Sdes T_ARRAY_aelem_bytes = 4, 74892555Sdes#endif 74992555Sdes T_NARROWOOP_aelem_bytes = 4, 75092555Sdes T_NARROWKLASS_aelem_bytes = 4, 75192555Sdes T_VOID_aelem_bytes = 0 75292555Sdes}; 75392555Sdes 75492555Sdesextern int _type2aelembytes[T_CONFLICT+1]; // maps a BasicType to nof bytes used by its array element 75592555Sdes#ifdef ASSERT 756294332Sdesextern int type2aelembytes(BasicType t, bool allow_address = false); // asserts 757323136Sdes#else 75892555Sdesinline int type2aelembytes(BasicType t, bool allow_address = false) { return _type2aelembytes[t]; } 759323136Sdes#endif 76092555Sdes 76192555Sdes 76292555Sdes// JavaValue serves as a container for arbitrary Java values. 763323136Sdes 76492555Sdesclass JavaValue { 76592555Sdes 76692555Sdes public: 767221420Sdes typedef union JavaCallValue { 768221420Sdes jfloat f; 769221420Sdes jdouble d; 77092555Sdes jint i; 77192555Sdes jlong l; 77292555Sdes jobject h; 773261320Sdes } JavaCallValue; 774261320Sdes 775261320Sdes private: 77692555Sdes BasicType _type; 777323136Sdes JavaCallValue _value; 778323136Sdes 77992555Sdes public: 78092555Sdes JavaValue(BasicType t = T_ILLEGAL) { _type = t; } 78192555Sdes 78292555Sdes JavaValue(jfloat value) { 78392555Sdes _type = T_FLOAT; 78492555Sdes _value.f = value; 78592555Sdes } 78692555Sdes 78792555Sdes JavaValue(jdouble value) { 78892555Sdes _type = T_DOUBLE; 78992555Sdes _value.d = value; 79092555Sdes } 79192555Sdes 79276259Sgreen jfloat get_jfloat() const { return _value.f; } 79376259Sgreen jdouble get_jdouble() const { return _value.d; } 79492555Sdes jint get_jint() const { return _value.i; } 79576259Sgreen jlong get_jlong() const { return _value.l; } 79676259Sgreen jobject get_jobject() const { return _value.h; } 79792555Sdes JavaCallValue* get_value_addr() { return &_value; } 79892555Sdes BasicType get_type() const { return _type; } 79976259Sgreen 80076259Sgreen void set_jfloat(jfloat f) { _value.f = f;} 80176259Sgreen void set_jdouble(jdouble d) { _value.d = d;} 80276259Sgreen void set_jint(jint i) { _value.i = i;} 80376259Sgreen void set_jlong(jlong l) { _value.l = l;} 80476259Sgreen void set_jobject(jobject h) { _value.h = h;} 80576259Sgreen void set_type(BasicType t) { _type = t; } 80676259Sgreen 80776259Sgreen jboolean get_jboolean() const { return (jboolean) (_value.i);} 808162856Sdes jbyte get_jbyte() const { return (jbyte) (_value.i);} 80976259Sgreen jchar get_jchar() const { return (jchar) (_value.i);} 810162856Sdes jshort get_jshort() const { return (jshort) (_value.i);} 811162856Sdes 81276259Sgreen}; 813215116Sdes 814215116Sdes 815215116Sdes#define STACK_BIAS 0 816215116Sdes// V9 Sparc CPU's running in 64 Bit mode use a stack bias of 7ff 817215116Sdes// in order to extend the reach of the stack pointer. 818215116Sdes#if defined(SPARC) && defined(_LP64) 819215116Sdes#undef STACK_BIAS 82076259Sgreen#define STACK_BIAS 0x7ff 821215116Sdes#endif 822215116Sdes 823215116Sdes 824215116Sdes// TosState describes the top-of-stack state before and after the execution of 825215116Sdes// a bytecode or method. The top-of-stack value may be cached in one or more CPU 826215116Sdes// registers. The TosState corresponds to the 'machine representation' of this cached 827215116Sdes// value. There's 4 states corresponding to the JAVA types int, long, float & double 828215116Sdes// as well as a 5th state in case the top-of-stack value is actually on the top 829215116Sdes// of stack (in memory) and thus not cached. The atos state corresponds to the itos 830215116Sdes// state when it comes to machine representation but is used separately for (oop) 831215116Sdes// type specific operations (e.g. verification code). 832215116Sdes 833215116Sdesenum TosState { // describes the tos cache contents 834215116Sdes btos = 0, // byte, bool tos cached 835215116Sdes ztos = 1, // byte, bool tos cached 836215116Sdes ctos = 2, // char tos cached 83792555Sdes stos = 3, // short tos cached 838215116Sdes itos = 4, // int tos cached 839215116Sdes ltos = 5, // long tos cached 84076259Sgreen ftos = 6, // float tos cached 841215116Sdes dtos = 7, // double tos cached 842215116Sdes atos = 8, // object cached 843215116Sdes vtos = 9, // tos not cached 844215116Sdes number_of_states, 845215116Sdes ilgl // illegal state: should not occur 846215116Sdes}; 84792555Sdes 84892555Sdes 84992555Sdesinline TosState as_TosState(BasicType type) { 85092555Sdes switch (type) { 85192555Sdes case T_BYTE : return btos; 85276259Sgreen case T_BOOLEAN: return ztos; 85376259Sgreen case T_CHAR : return ctos; 85476259Sgreen case T_SHORT : return stos; 85576259Sgreen case T_INT : return itos; 85676259Sgreen 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 866inline 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. 885TosState 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// 904enum 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 926class ClassFileStream; 927 928class Event; 929 930class Thread; 931class VMThread; 932class JavaThread; 933class Threads; 934 935class VM_Operation; 936class VMOperationQueue; 937 938class CodeBlob; 939class CompiledMethod; 940class nmethod; 941class RuntimeBlob; 942class OSRAdapter; 943class I2CAdapter; 944class C2IAdapter; 945class CompiledIC; 946class relocInfo; 947class ScopeDesc; 948class PcDesc; 949 950class Recompiler; 951class Recompilee; 952class RecompilationPolicy; 953class RFrame; 954class CompiledRFrame; 955class InterpretedRFrame; 956 957class frame; 958 959class vframe; 960class javaVFrame; 961class interpretedVFrame; 962class compiledVFrame; 963class deoptimizedVFrame; 964class externalVFrame; 965class entryVFrame; 966 967class RegisterMap; 968 969class Mutex; 970class Monitor; 971class BasicLock; 972class BasicObjectLock; 973 974class PeriodicTask; 975 976class JavaCallWrapper; 977 978class oopDesc; 979class metaDataOopDesc; 980 981class NativeCall; 982 983class zone; 984 985class StubQueue; 986 987class outputStream; 988 989class ResourceArea; 990 991class DebugInformationRecorder; 992class ScopeValue; 993class CompressedStream; 994class DebugInfoReadStream; 995class DebugInfoWriteStream; 996class LocationValue; 997class ConstantValue; 998class IllegalValue; 999 1000class PrivilegedElement; 1001class MonitorArray; 1002 1003class MonitorInfo; 1004 1005class OffsetClosure; 1006class OopMapCache; 1007class InterpreterOopMap; 1008class OopMapCacheEntry; 1009class OSThread; 1010 1011typedef int (*OSThreadStartFunc)(void*); 1012 1013class Space; 1014 1015class JavaValue; 1016class methodHandle; 1017class JavaCallArguments; 1018 1019// Basic support for errors (general debug facilities not defined at this point fo the include phase) 1020 1021extern void basic_fatal(const char* msg); 1022 1023 1024//---------------------------------------------------------------------------------------------------- 1025// Special constants for debugging 1026 1027const jint badInt = -3; // generic "bad int" value 1028const long badAddressVal = -2; // generic "bad address" value 1029const long badOopVal = -1; // generic "bad oop" value 1030const intptr_t badHeapOopVal = (intptr_t) CONST64(0x2BAD4B0BBAADBABE); // value used to zap heap after GC 1031const int badHandleValue = 0xBC; // value used to zap vm handle area 1032const int badResourceValue = 0xAB; // value used to zap resource area 1033const int freeBlockPad = 0xBA; // value used to pad freed blocks. 1034const int uninitBlockPad = 0xF1; // value used to zap newly malloc'd blocks. 1035const juint uninitMetaWordVal= 0xf7f7f7f7; // value used to zap newly allocated metachunk 1036const intptr_t badJNIHandleVal = (intptr_t) UCONST64(0xFEFEFEFEFEFEFEFE); // value used to zap jni handle area 1037const juint badHeapWordVal = 0xBAADBABE; // value used to zap heap after GC 1038const juint badMetaWordVal = 0xBAADFADE; // value used to zap metadata heap after GC 1039const int badCodeHeapNewVal= 0xCC; // value used to zap Code heap at allocation 1040const 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 1056const intptr_t AllBits = ~0; // all bits set in a word 1057const intptr_t NoBits = 0; // no bits set in a word 1058const jlong NoLongBits = 0; // no bits set in a long 1059const 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 1068inline void set_bits (intptr_t& x, intptr_t m) { x |= m; } 1069inline void clear_bits (intptr_t& x, intptr_t m) { x &= ~m; } 1070inline intptr_t mask_bits (intptr_t x, intptr_t m) { return x & m; } 1071inline jlong mask_long_bits (jlong x, jlong m) { return x & m; } 1072inline bool mask_bits_are_true (intptr_t flags, intptr_t mask) { return (flags & mask) == mask; } 1073 1074// bit-operations using the n.th bit 1075inline void set_nth_bit(intptr_t& x, int n) { set_bits (x, nth_bit(n)); } 1076inline void clear_nth_bit(intptr_t& x, int n) { clear_bits(x, nth_bit(n)); } 1077inline 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!) 1080inline 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#define max(a,b) Do_not_use_max_use_MAX2_instead 1099#define min(a,b) Do_not_use_min_use_MIN2_instead 1100 1101// It is necessary to use templates here. Having normal overloaded 1102// functions does not work because it is necessary to provide both 32- 1103// and 64-bit overloaded functions, which does not work, and having 1104// explicitly-typed versions of these routines (i.e., MAX2I, MAX2L) 1105// will be even more error-prone than macros. 1106template<class T> inline T MAX2(T a, T b) { return (a > b) ? a : b; } 1107template<class T> inline T MIN2(T a, T b) { return (a < b) ? a : b; } 1108template<class T> inline T MAX3(T a, T b, T c) { return MAX2(MAX2(a, b), c); } 1109template<class T> inline T MIN3(T a, T b, T c) { return MIN2(MIN2(a, b), c); } 1110template<class T> inline T MAX4(T a, T b, T c, T d) { return MAX2(MAX3(a, b, c), d); } 1111template<class T> inline T MIN4(T a, T b, T c, T d) { return MIN2(MIN3(a, b, c), d); } 1112 1113template<class T> inline T ABS(T x) { return (x > 0) ? x : -x; } 1114 1115// true if x is a power of 2, false otherwise 1116inline bool is_power_of_2(intptr_t x) { 1117 return ((x != NoBits) && (mask_bits(x, x - 1) == NoBits)); 1118} 1119 1120// long version of is_power_of_2 1121inline bool is_power_of_2_long(jlong x) { 1122 return ((x != NoLongBits) && (mask_long_bits(x, x - 1) == NoLongBits)); 1123} 1124 1125// Returns largest i such that 2^i <= x. 1126// If x < 0, the function returns 31 on a 32-bit machine and 63 on a 64-bit machine. 1127// If x == 0, the function returns -1. 1128inline int log2_intptr(intptr_t x) { 1129 int i = -1; 1130 uintptr_t p = 1; 1131 while (p != 0 && p <= (uintptr_t)x) { 1132 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) 1133 i++; p *= 2; 1134 } 1135 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) 1136 // If p = 0, overflow has occurred and i = 31 or i = 63 (depending on the machine word size). 1137 return i; 1138} 1139 1140//* largest i such that 2^i <= x 1141// A negative value of 'x' will return '63' 1142inline int log2_long(jlong x) { 1143 int i = -1; 1144 julong p = 1; 1145 while (p != 0 && p <= (julong)x) { 1146 // p = 2^(i+1) && p <= x (i.e., 2^(i+1) <= x) 1147 i++; p *= 2; 1148 } 1149 // p = 2^(i+1) && x < p (i.e., 2^i <= x < 2^(i+1)) 1150 // (if p = 0 then overflow occurred and i = 63) 1151 return i; 1152} 1153 1154//* the argument must be exactly a power of 2 1155inline int exact_log2(intptr_t x) { 1156 #ifdef ASSERT 1157 if (!is_power_of_2(x)) basic_fatal("x must be a power of 2"); 1158 #endif 1159 return log2_intptr(x); 1160} 1161 1162//* the argument must be exactly a power of 2 1163inline int exact_log2_long(jlong x) { 1164 #ifdef ASSERT 1165 if (!is_power_of_2_long(x)) basic_fatal("x must be a power of 2"); 1166 #endif 1167 return log2_long(x); 1168} 1169 1170 1171// returns integer round-up to the nearest multiple of s (s must be a power of two) 1172inline intptr_t round_to(intptr_t x, uintx s) { 1173 #ifdef ASSERT 1174 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); 1175 #endif 1176 const uintx m = s - 1; 1177 return mask_bits(x + m, ~m); 1178} 1179 1180// returns integer round-down to the nearest multiple of s (s must be a power of two) 1181inline intptr_t round_down(intptr_t x, uintx s) { 1182 #ifdef ASSERT 1183 if (!is_power_of_2(s)) basic_fatal("s must be a power of 2"); 1184 #endif 1185 const uintx m = s - 1; 1186 return mask_bits(x, ~m); 1187} 1188 1189 1190inline bool is_odd (intx x) { return x & 1; } 1191inline bool is_even(intx x) { return !is_odd(x); } 1192 1193// "to" should be greater than "from." 1194inline intx byte_size(void* from, void* to) { 1195 return (address)to - (address)from; 1196} 1197 1198//---------------------------------------------------------------------------------------------------- 1199// Avoid non-portable casts with these routines (DEPRECATED) 1200 1201// NOTE: USE Bytes class INSTEAD WHERE POSSIBLE 1202// Bytes is optimized machine-specifically and may be much faster then the portable routines below. 1203 1204// Given sequence of four bytes, build into a 32-bit word 1205// following the conventions used in class files. 1206// On the 386, this could be realized with a simple address cast. 1207// 1208 1209// This routine takes eight bytes: 1210inline u8 build_u8_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1211 return (( u8(c1) << 56 ) & ( u8(0xff) << 56 )) 1212 | (( u8(c2) << 48 ) & ( u8(0xff) << 48 )) 1213 | (( u8(c3) << 40 ) & ( u8(0xff) << 40 )) 1214 | (( u8(c4) << 32 ) & ( u8(0xff) << 32 )) 1215 | (( u8(c5) << 24 ) & ( u8(0xff) << 24 )) 1216 | (( u8(c6) << 16 ) & ( u8(0xff) << 16 )) 1217 | (( u8(c7) << 8 ) & ( u8(0xff) << 8 )) 1218 | (( u8(c8) << 0 ) & ( u8(0xff) << 0 )); 1219} 1220 1221// This routine takes four bytes: 1222inline u4 build_u4_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { 1223 return (( u4(c1) << 24 ) & 0xff000000) 1224 | (( u4(c2) << 16 ) & 0x00ff0000) 1225 | (( u4(c3) << 8 ) & 0x0000ff00) 1226 | (( u4(c4) << 0 ) & 0x000000ff); 1227} 1228 1229// And this one works if the four bytes are contiguous in memory: 1230inline u4 build_u4_from( u1* p ) { 1231 return build_u4_from( p[0], p[1], p[2], p[3] ); 1232} 1233 1234// Ditto for two-byte ints: 1235inline u2 build_u2_from( u1 c1, u1 c2 ) { 1236 return u2((( u2(c1) << 8 ) & 0xff00) 1237 | (( u2(c2) << 0 ) & 0x00ff)); 1238} 1239 1240// And this one works if the two bytes are contiguous in memory: 1241inline u2 build_u2_from( u1* p ) { 1242 return build_u2_from( p[0], p[1] ); 1243} 1244 1245// Ditto for floats: 1246inline jfloat build_float_from( u1 c1, u1 c2, u1 c3, u1 c4 ) { 1247 u4 u = build_u4_from( c1, c2, c3, c4 ); 1248 return *(jfloat*)&u; 1249} 1250 1251inline jfloat build_float_from( u1* p ) { 1252 u4 u = build_u4_from( p ); 1253 return *(jfloat*)&u; 1254} 1255 1256 1257// now (64-bit) longs 1258 1259inline jlong build_long_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1260 return (( jlong(c1) << 56 ) & ( jlong(0xff) << 56 )) 1261 | (( jlong(c2) << 48 ) & ( jlong(0xff) << 48 )) 1262 | (( jlong(c3) << 40 ) & ( jlong(0xff) << 40 )) 1263 | (( jlong(c4) << 32 ) & ( jlong(0xff) << 32 )) 1264 | (( jlong(c5) << 24 ) & ( jlong(0xff) << 24 )) 1265 | (( jlong(c6) << 16 ) & ( jlong(0xff) << 16 )) 1266 | (( jlong(c7) << 8 ) & ( jlong(0xff) << 8 )) 1267 | (( jlong(c8) << 0 ) & ( jlong(0xff) << 0 )); 1268} 1269 1270inline jlong build_long_from( u1* p ) { 1271 return build_long_from( p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7] ); 1272} 1273 1274 1275// Doubles, too! 1276inline jdouble build_double_from( u1 c1, u1 c2, u1 c3, u1 c4, u1 c5, u1 c6, u1 c7, u1 c8 ) { 1277 jlong u = build_long_from( c1, c2, c3, c4, c5, c6, c7, c8 ); 1278 return *(jdouble*)&u; 1279} 1280 1281inline jdouble build_double_from( u1* p ) { 1282 jlong u = build_long_from( p ); 1283 return *(jdouble*)&u; 1284} 1285 1286 1287// Portable routines to go the other way: 1288 1289inline void explode_short_to( u2 x, u1& c1, u1& c2 ) { 1290 c1 = u1(x >> 8); 1291 c2 = u1(x); 1292} 1293 1294inline void explode_short_to( u2 x, u1* p ) { 1295 explode_short_to( x, p[0], p[1]); 1296} 1297 1298inline void explode_int_to( u4 x, u1& c1, u1& c2, u1& c3, u1& c4 ) { 1299 c1 = u1(x >> 24); 1300 c2 = u1(x >> 16); 1301 c3 = u1(x >> 8); 1302 c4 = u1(x); 1303} 1304 1305inline void explode_int_to( u4 x, u1* p ) { 1306 explode_int_to( x, p[0], p[1], p[2], p[3]); 1307} 1308 1309 1310// Pack and extract shorts to/from ints: 1311 1312inline int extract_low_short_from_int(jint x) { 1313 return x & 0xffff; 1314} 1315 1316inline int extract_high_short_from_int(jint x) { 1317 return (x >> 16) & 0xffff; 1318} 1319 1320inline int build_int_from_shorts( jushort low, jushort high ) { 1321 return ((int)((unsigned int)high << 16) | (unsigned int)low); 1322} 1323 1324// Convert pointer to intptr_t, for use in printing pointers. 1325inline intptr_t p2i(const void * p) { 1326 return (intptr_t) p; 1327} 1328 1329// swap a & b 1330template<class T> static void swap(T& a, T& b) { 1331 T tmp = a; 1332 a = b; 1333 b = tmp; 1334} 1335 1336// Printf-style formatters for fixed- and variable-width types as pointers and 1337// integers. These are derived from the definitions in inttypes.h. If the platform 1338// doesn't provide appropriate definitions, they should be provided in 1339// the compiler-specific definitions file (e.g., globalDefinitions_gcc.hpp) 1340 1341#define BOOL_TO_STR(_b_) ((_b_) ? "true" : "false") 1342 1343// Format 32-bit quantities. 1344#define INT32_FORMAT "%" PRId32 1345#define UINT32_FORMAT "%" PRIu32 1346#define INT32_FORMAT_W(width) "%" #width PRId32 1347#define UINT32_FORMAT_W(width) "%" #width PRIu32 1348 1349#define PTR32_FORMAT "0x%08" PRIx32 1350#define PTR32_FORMAT_W(width) "0x%" #width PRIx32 1351 1352// Format 64-bit quantities. 1353#define INT64_FORMAT "%" PRId64 1354#define UINT64_FORMAT "%" PRIu64 1355#define UINT64_FORMAT_X "%" PRIx64 1356#define INT64_FORMAT_W(width) "%" #width PRId64 1357#define UINT64_FORMAT_W(width) "%" #width PRIu64 1358 1359#define PTR64_FORMAT "0x%016" PRIx64 1360 1361// Format jlong, if necessary 1362#ifndef JLONG_FORMAT 1363#define JLONG_FORMAT INT64_FORMAT 1364#endif 1365#ifndef JULONG_FORMAT 1366#define JULONG_FORMAT UINT64_FORMAT 1367#endif 1368#ifndef JULONG_FORMAT_X 1369#define JULONG_FORMAT_X UINT64_FORMAT_X 1370#endif 1371 1372// Format pointers which change size between 32- and 64-bit. 1373#ifdef _LP64 1374#define INTPTR_FORMAT "0x%016" PRIxPTR 1375#define PTR_FORMAT "0x%016" PRIxPTR 1376#else // !_LP64 1377#define INTPTR_FORMAT "0x%08" PRIxPTR 1378#define PTR_FORMAT "0x%08" PRIxPTR 1379#endif // _LP64 1380 1381#define INTPTR_FORMAT_W(width) "%" #width PRIxPTR 1382 1383#define SSIZE_FORMAT "%" PRIdPTR 1384#define SIZE_FORMAT "%" PRIuPTR 1385#define SIZE_FORMAT_HEX "0x%" PRIxPTR 1386#define SSIZE_FORMAT_W(width) "%" #width PRIdPTR 1387#define SIZE_FORMAT_W(width) "%" #width PRIuPTR 1388#define SIZE_FORMAT_HEX_W(width) "0x%" #width PRIxPTR 1389 1390#define INTX_FORMAT "%" PRIdPTR 1391#define UINTX_FORMAT "%" PRIuPTR 1392#define INTX_FORMAT_W(width) "%" #width PRIdPTR 1393#define UINTX_FORMAT_W(width) "%" #width PRIuPTR 1394 1395 1396#define ARRAY_SIZE(array) (sizeof(array)/sizeof((array)[0])) 1397 1398//---------------------------------------------------------------------------------------------------- 1399// Sum and product which can never overflow: they wrap, just like the 1400// Java operations. Note that we don't intend these to be used for 1401// general-purpose arithmetic: their purpose is to emulate Java 1402// operations. 1403 1404// The goal of this code to avoid undefined or implementation-defined 1405// behavior. The use of an lvalue to reference cast is explicitly 1406// permitted by Lvalues and rvalues [basic.lval]. [Section 3.10 Para 1407// 15 in C++03] 1408#define JAVA_INTEGER_OP(OP, NAME, TYPE, UNSIGNED_TYPE) \ 1409inline TYPE NAME (TYPE in1, TYPE in2) { \ 1410 UNSIGNED_TYPE ures = static_cast<UNSIGNED_TYPE>(in1); \ 1411 ures OP ## = static_cast<UNSIGNED_TYPE>(in2); \ 1412 return reinterpret_cast<TYPE&>(ures); \ 1413} 1414 1415JAVA_INTEGER_OP(+, java_add, jint, juint) 1416JAVA_INTEGER_OP(-, java_subtract, jint, juint) 1417JAVA_INTEGER_OP(*, java_multiply, jint, juint) 1418JAVA_INTEGER_OP(+, java_add, jlong, julong) 1419JAVA_INTEGER_OP(-, java_subtract, jlong, julong) 1420JAVA_INTEGER_OP(*, java_multiply, jlong, julong) 1421 1422#undef JAVA_INTEGER_OP 1423 1424// Dereference vptr 1425// All C++ compilers that we know of have the vtbl pointer in the first 1426// word. If there are exceptions, this function needs to be made compiler 1427// specific. 1428static inline void* dereference_vptr(const void* addr) { 1429 return *(void**)addr; 1430} 1431 1432#endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP 1433