allocation.hpp revision 4527:6f817ce50129
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_MEMORY_ALLOCATION_HPP 26#define SHARE_VM_MEMORY_ALLOCATION_HPP 27 28#include "runtime/globals.hpp" 29#include "utilities/globalDefinitions.hpp" 30#include "utilities/macros.hpp" 31#ifdef COMPILER1 32#include "c1/c1_globals.hpp" 33#endif 34#ifdef COMPILER2 35#include "opto/c2_globals.hpp" 36#endif 37 38#include <new> 39 40#define ARENA_ALIGN_M1 (((size_t)(ARENA_AMALLOC_ALIGNMENT)) - 1) 41#define ARENA_ALIGN_MASK (~((size_t)ARENA_ALIGN_M1)) 42#define ARENA_ALIGN(x) ((((size_t)(x)) + ARENA_ALIGN_M1) & ARENA_ALIGN_MASK) 43 44 45// noinline attribute 46#ifdef _WINDOWS 47 #define _NOINLINE_ __declspec(noinline) 48#else 49 #if __GNUC__ < 3 // gcc 2.x does not support noinline attribute 50 #define _NOINLINE_ 51 #else 52 #define _NOINLINE_ __attribute__ ((noinline)) 53 #endif 54#endif 55 56class AllocFailStrategy { 57public: 58 enum AllocFailEnum { EXIT_OOM, RETURN_NULL }; 59}; 60typedef AllocFailStrategy::AllocFailEnum AllocFailType; 61 62// All classes in the virtual machine must be subclassed 63// by one of the following allocation classes: 64// 65// For objects allocated in the resource area (see resourceArea.hpp). 66// - ResourceObj 67// 68// For objects allocated in the C-heap (managed by: free & malloc). 69// - CHeapObj 70// 71// For objects allocated on the stack. 72// - StackObj 73// 74// For embedded objects. 75// - ValueObj 76// 77// For classes used as name spaces. 78// - AllStatic 79// 80// For classes in Metaspace (class data) 81// - MetaspaceObj 82// 83// The printable subclasses are used for debugging and define virtual 84// member functions for printing. Classes that avoid allocating the 85// vtbl entries in the objects should therefore not be the printable 86// subclasses. 87// 88// The following macros and function should be used to allocate memory 89// directly in the resource area or in the C-heap, The _OBJECT variants 90// of the NEW_C_HEAP macros are used when a constructor and destructor 91// must be invoked for the object(s) and the objects are not inherited 92// from CHeapObj. The preferable way to allocate objects is using the 93// new operator. 94// 95// WARNING: The array variant must only be used for a homogenous array 96// where all objects are of the exact type specified. If subtypes are 97// stored in the array then the incorrect destructor might be called. 98// 99// NEW_RESOURCE_ARRAY(type,size) 100// NEW_RESOURCE_OBJ(type) 101// NEW_C_HEAP_ARRAY(type,size) 102// NEW_C_HEAP_OBJ(type) 103// NEW_C_HEAP_OBJECT(type, memflags, pc, allocfail) 104// NEW_C_HEAP_OBJECT_ARRAY(type, size, memflags, pc, allocfail) 105// FREE_C_HEAP_OBJECT(type, objname, memflags) 106// FREE_C_HEAP_OBJECT_ARRAY(type, size, arrayname, memflags) 107// char* AllocateHeap(size_t size, const char* name); 108// void FreeHeap(void* p); 109// 110// C-heap allocation can be traced using +PrintHeapAllocation. 111// malloc and free should therefore never called directly. 112 113// Base class for objects allocated in the C-heap. 114 115// In non product mode we introduce a super class for all allocation classes 116// that supports printing. 117// We avoid the superclass in product mode since some C++ compilers add 118// a word overhead for empty super classes. 119 120#ifdef PRODUCT 121#define ALLOCATION_SUPER_CLASS_SPEC 122#else 123#define ALLOCATION_SUPER_CLASS_SPEC : public AllocatedObj 124class AllocatedObj { 125 public: 126 // Printing support 127 void print() const; 128 void print_value() const; 129 130 virtual void print_on(outputStream* st) const; 131 virtual void print_value_on(outputStream* st) const; 132}; 133#endif 134 135 136/* 137 * MemoryType bitmap layout: 138 * | 16 15 14 13 12 11 10 09 | 08 07 06 05 | 04 03 02 01 | 139 * | memory type | object | reserved | 140 * | | type | | 141 */ 142enum MemoryType { 143 // Memory type by sub systems. It occupies lower byte. 144 mtNone = 0x0000, // undefined 145 mtClass = 0x0100, // memory class for Java classes 146 mtThread = 0x0200, // memory for thread objects 147 mtThreadStack = 0x0300, 148 mtCode = 0x0400, // memory for generated code 149 mtGC = 0x0500, // memory for GC 150 mtCompiler = 0x0600, // memory for compiler 151 mtInternal = 0x0700, // memory used by VM, but does not belong to 152 // any of above categories, and not used for 153 // native memory tracking 154 mtOther = 0x0800, // memory not used by VM 155 mtSymbol = 0x0900, // symbol 156 mtNMT = 0x0A00, // memory used by native memory tracking 157 mtChunk = 0x0B00, // chunk that holds content of arenas 158 mtJavaHeap = 0x0C00, // Java heap 159 mtClassShared = 0x0D00, // class data sharing 160 mtTest = 0x0E00, // Test type for verifying NMT 161 mt_number_of_types = 0x000E, // number of memory types (mtDontTrack 162 // is not included as validate type) 163 mtDontTrack = 0x0F00, // memory we do not or cannot track 164 mt_masks = 0x7F00, 165 166 // object type mask 167 otArena = 0x0010, // an arena object 168 otNMTRecorder = 0x0020, // memory recorder object 169 ot_masks = 0x00F0 170}; 171 172#define IS_MEMORY_TYPE(flags, type) ((flags & mt_masks) == type) 173#define HAS_VALID_MEMORY_TYPE(flags)((flags & mt_masks) != mtNone) 174#define FLAGS_TO_MEMORY_TYPE(flags) (flags & mt_masks) 175 176#define IS_ARENA_OBJ(flags) ((flags & ot_masks) == otArena) 177#define IS_NMT_RECORDER(flags) ((flags & ot_masks) == otNMTRecorder) 178#define NMT_CAN_TRACK(flags) (!IS_NMT_RECORDER(flags) && !(IS_MEMORY_TYPE(flags, mtDontTrack))) 179 180typedef unsigned short MEMFLAGS; 181 182#if INCLUDE_NMT 183 184extern bool NMT_track_callsite; 185 186#else 187 188const bool NMT_track_callsite = false; 189 190#endif // INCLUDE_NMT 191 192// debug build does not inline 193#if defined(_DEBUG_) 194 #define CURRENT_PC (NMT_track_callsite ? os::get_caller_pc(1) : 0) 195 #define CALLER_PC (NMT_track_callsite ? os::get_caller_pc(2) : 0) 196 #define CALLER_CALLER_PC (NMT_track_callsite ? os::get_caller_pc(3) : 0) 197#else 198 #define CURRENT_PC (NMT_track_callsite? os::get_caller_pc(0) : 0) 199 #define CALLER_PC (NMT_track_callsite ? os::get_caller_pc(1) : 0) 200 #define CALLER_CALLER_PC (NMT_track_callsite ? os::get_caller_pc(2) : 0) 201#endif 202 203 204 205template <MEMFLAGS F> class CHeapObj ALLOCATION_SUPER_CLASS_SPEC { 206 public: 207 _NOINLINE_ void* operator new(size_t size, address caller_pc = 0); 208 _NOINLINE_ void* operator new (size_t size, const std::nothrow_t& nothrow_constant, 209 address caller_pc = 0); 210 _NOINLINE_ void* operator new [](size_t size, address caller_pc = 0); 211 _NOINLINE_ void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, 212 address caller_pc = 0); 213 void operator delete(void* p); 214 void operator delete [] (void* p); 215}; 216 217// Base class for objects allocated on the stack only. 218// Calling new or delete will result in fatal error. 219 220class StackObj ALLOCATION_SUPER_CLASS_SPEC { 221 private: 222 void* operator new(size_t size); 223 void operator delete(void* p); 224 void* operator new [](size_t size); 225 void operator delete [](void* p); 226}; 227 228// Base class for objects used as value objects. 229// Calling new or delete will result in fatal error. 230// 231// Portability note: Certain compilers (e.g. gcc) will 232// always make classes bigger if it has a superclass, even 233// if the superclass does not have any virtual methods or 234// instance fields. The HotSpot implementation relies on this 235// not to happen. So never make a ValueObj class a direct subclass 236// of this object, but use the VALUE_OBJ_CLASS_SPEC class instead, e.g., 237// like this: 238// 239// class A VALUE_OBJ_CLASS_SPEC { 240// ... 241// } 242// 243// With gcc and possible other compilers the VALUE_OBJ_CLASS_SPEC can 244// be defined as a an empty string "". 245// 246class _ValueObj { 247 private: 248 void* operator new(size_t size); 249 void operator delete(void* p); 250 void* operator new [](size_t size); 251 void operator delete [](void* p); 252}; 253 254 255// Base class for objects stored in Metaspace. 256// Calling delete will result in fatal error. 257// 258// Do not inherit from something with a vptr because this class does 259// not introduce one. This class is used to allocate both shared read-only 260// and shared read-write classes. 261// 262 263class ClassLoaderData; 264 265class MetaspaceObj { 266 public: 267 bool is_metadata() const; 268 bool is_metaspace_object() const; // more specific test but slower 269 bool is_shared() const; 270 void print_address_on(outputStream* st) const; // nonvirtual address printing 271 272 void* operator new(size_t size, ClassLoaderData* loader_data, 273 size_t word_size, bool read_only, Thread* thread); 274 // can't use TRAPS from this header file. 275 void operator delete(void* p) { ShouldNotCallThis(); } 276}; 277 278// Base class for classes that constitute name spaces. 279 280class AllStatic { 281 public: 282 AllStatic() { ShouldNotCallThis(); } 283 ~AllStatic() { ShouldNotCallThis(); } 284}; 285 286 287//------------------------------Chunk------------------------------------------ 288// Linked list of raw memory chunks 289class Chunk: CHeapObj<mtChunk> { 290 friend class VMStructs; 291 292 protected: 293 Chunk* _next; // Next Chunk in list 294 const size_t _len; // Size of this Chunk 295 public: 296 void* operator new(size_t size, size_t length); 297 void operator delete(void* p); 298 Chunk(size_t length); 299 300 enum { 301 // default sizes; make them slightly smaller than 2**k to guard against 302 // buddy-system style malloc implementations 303#ifdef _LP64 304 slack = 40, // [RGV] Not sure if this is right, but make it 305 // a multiple of 8. 306#else 307 slack = 20, // suspected sizeof(Chunk) + internal malloc headers 308#endif 309 310 init_size = 1*K - slack, // Size of first chunk 311 medium_size= 10*K - slack, // Size of medium-sized chunk 312 size = 32*K - slack, // Default size of an Arena chunk (following the first) 313 non_pool_size = init_size + 32 // An initial size which is not one of above 314 }; 315 316 void chop(); // Chop this chunk 317 void next_chop(); // Chop next chunk 318 static size_t aligned_overhead_size(void) { return ARENA_ALIGN(sizeof(Chunk)); } 319 static size_t aligned_overhead_size(size_t byte_size) { return ARENA_ALIGN(byte_size); } 320 321 size_t length() const { return _len; } 322 Chunk* next() const { return _next; } 323 void set_next(Chunk* n) { _next = n; } 324 // Boundaries of data area (possibly unused) 325 char* bottom() const { return ((char*) this) + aligned_overhead_size(); } 326 char* top() const { return bottom() + _len; } 327 bool contains(char* p) const { return bottom() <= p && p <= top(); } 328 329 // Start the chunk_pool cleaner task 330 static void start_chunk_pool_cleaner_task(); 331 332 static void clean_chunk_pool(); 333}; 334 335//------------------------------Arena------------------------------------------ 336// Fast allocation of memory 337class Arena : public CHeapObj<mtNone|otArena> { 338protected: 339 friend class ResourceMark; 340 friend class HandleMark; 341 friend class NoHandleMark; 342 friend class VMStructs; 343 344 Chunk *_first; // First chunk 345 Chunk *_chunk; // current chunk 346 char *_hwm, *_max; // High water mark and max in current chunk 347 // Get a new Chunk of at least size x 348 void* grow(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 349 size_t _size_in_bytes; // Size of arena (used for native memory tracking) 350 351 NOT_PRODUCT(static julong _bytes_allocated;) // total #bytes allocated since start 352 friend class AllocStats; 353 debug_only(void* malloc(size_t size);) 354 debug_only(void* internal_malloc_4(size_t x);) 355 NOT_PRODUCT(void inc_bytes_allocated(size_t x);) 356 357 void signal_out_of_memory(size_t request, const char* whence) const; 358 359 void check_for_overflow(size_t request, const char* whence) const { 360 if (UINTPTR_MAX - request < (uintptr_t)_hwm) { 361 signal_out_of_memory(request, whence); 362 } 363 } 364 365 public: 366 Arena(); 367 Arena(size_t init_size); 368 ~Arena(); 369 void destruct_contents(); 370 char* hwm() const { return _hwm; } 371 372 // new operators 373 void* operator new (size_t size); 374 void* operator new (size_t size, const std::nothrow_t& nothrow_constant); 375 376 // dynamic memory type tagging 377 void* operator new(size_t size, MEMFLAGS flags); 378 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags); 379 void operator delete(void* p); 380 381 // Fast allocate in the arena. Common case is: pointer test + increment. 382 void* Amalloc(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 383 assert(is_power_of_2(ARENA_AMALLOC_ALIGNMENT) , "should be a power of 2"); 384 x = ARENA_ALIGN(x); 385 debug_only(if (UseMallocOnly) return malloc(x);) 386 check_for_overflow(x, "Arena::Amalloc"); 387 NOT_PRODUCT(inc_bytes_allocated(x);) 388 if (_hwm + x > _max) { 389 return grow(x, alloc_failmode); 390 } else { 391 char *old = _hwm; 392 _hwm += x; 393 return old; 394 } 395 } 396 // Further assume size is padded out to words 397 void *Amalloc_4(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 398 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); 399 debug_only(if (UseMallocOnly) return malloc(x);) 400 check_for_overflow(x, "Arena::Amalloc_4"); 401 NOT_PRODUCT(inc_bytes_allocated(x);) 402 if (_hwm + x > _max) { 403 return grow(x, alloc_failmode); 404 } else { 405 char *old = _hwm; 406 _hwm += x; 407 return old; 408 } 409 } 410 411 // Allocate with 'double' alignment. It is 8 bytes on sparc. 412 // In other cases Amalloc_D() should be the same as Amalloc_4(). 413 void* Amalloc_D(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 414 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); 415 debug_only(if (UseMallocOnly) return malloc(x);) 416#if defined(SPARC) && !defined(_LP64) 417#define DALIGN_M1 7 418 size_t delta = (((size_t)_hwm + DALIGN_M1) & ~DALIGN_M1) - (size_t)_hwm; 419 x += delta; 420#endif 421 check_for_overflow(x, "Arena::Amalloc_D"); 422 NOT_PRODUCT(inc_bytes_allocated(x);) 423 if (_hwm + x > _max) { 424 return grow(x, alloc_failmode); // grow() returns a result aligned >= 8 bytes. 425 } else { 426 char *old = _hwm; 427 _hwm += x; 428#if defined(SPARC) && !defined(_LP64) 429 old += delta; // align to 8-bytes 430#endif 431 return old; 432 } 433 } 434 435 // Fast delete in area. Common case is: NOP (except for storage reclaimed) 436 void Afree(void *ptr, size_t size) { 437#ifdef ASSERT 438 if (ZapResourceArea) memset(ptr, badResourceValue, size); // zap freed memory 439 if (UseMallocOnly) return; 440#endif 441 if (((char*)ptr) + size == _hwm) _hwm = (char*)ptr; 442 } 443 444 void *Arealloc( void *old_ptr, size_t old_size, size_t new_size, 445 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 446 447 // Move contents of this arena into an empty arena 448 Arena *move_contents(Arena *empty_arena); 449 450 // Determine if pointer belongs to this Arena or not. 451 bool contains( const void *ptr ) const; 452 453 // Total of all chunks in use (not thread-safe) 454 size_t used() const; 455 456 // Total # of bytes used 457 size_t size_in_bytes() const { return _size_in_bytes; }; 458 void set_size_in_bytes(size_t size); 459 460 static void free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) PRODUCT_RETURN; 461 static void free_all(char** start, char** end) PRODUCT_RETURN; 462 463 // how many arena instances 464 NOT_PRODUCT(static volatile jint _instance_count;) 465private: 466 // Reset this Arena to empty, access will trigger grow if necessary 467 void reset(void) { 468 _first = _chunk = NULL; 469 _hwm = _max = NULL; 470 set_size_in_bytes(0); 471 } 472}; 473 474// One of the following macros must be used when allocating 475// an array or object from an arena 476#define NEW_ARENA_ARRAY(arena, type, size) \ 477 (type*) (arena)->Amalloc((size) * sizeof(type)) 478 479#define REALLOC_ARENA_ARRAY(arena, type, old, old_size, new_size) \ 480 (type*) (arena)->Arealloc((char*)(old), (old_size) * sizeof(type), \ 481 (new_size) * sizeof(type) ) 482 483#define FREE_ARENA_ARRAY(arena, type, old, size) \ 484 (arena)->Afree((char*)(old), (size) * sizeof(type)) 485 486#define NEW_ARENA_OBJ(arena, type) \ 487 NEW_ARENA_ARRAY(arena, type, 1) 488 489 490//%note allocation_1 491extern char* resource_allocate_bytes(size_t size, 492 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 493extern char* resource_allocate_bytes(Thread* thread, size_t size, 494 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 495extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size, 496 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 497extern void resource_free_bytes( char *old, size_t size ); 498 499//---------------------------------------------------------------------- 500// Base class for objects allocated in the resource area per default. 501// Optionally, objects may be allocated on the C heap with 502// new(ResourceObj::C_HEAP) Foo(...) or in an Arena with new (&arena) 503// ResourceObj's can be allocated within other objects, but don't use 504// new or delete (allocation_type is unknown). If new is used to allocate, 505// use delete to deallocate. 506class ResourceObj ALLOCATION_SUPER_CLASS_SPEC { 507 public: 508 enum allocation_type { STACK_OR_EMBEDDED = 0, RESOURCE_AREA, C_HEAP, ARENA, allocation_mask = 0x3 }; 509 static void set_allocation_type(address res, allocation_type type) NOT_DEBUG_RETURN; 510#ifdef ASSERT 511 private: 512 // When this object is allocated on stack the new() operator is not 513 // called but garbage on stack may look like a valid allocation_type. 514 // Store negated 'this' pointer when new() is called to distinguish cases. 515 // Use second array's element for verification value to distinguish garbage. 516 uintptr_t _allocation_t[2]; 517 bool is_type_set() const; 518 public: 519 allocation_type get_allocation_type() const; 520 bool allocated_on_stack() const { return get_allocation_type() == STACK_OR_EMBEDDED; } 521 bool allocated_on_res_area() const { return get_allocation_type() == RESOURCE_AREA; } 522 bool allocated_on_C_heap() const { return get_allocation_type() == C_HEAP; } 523 bool allocated_on_arena() const { return get_allocation_type() == ARENA; } 524 ResourceObj(); // default construtor 525 ResourceObj(const ResourceObj& r); // default copy construtor 526 ResourceObj& operator=(const ResourceObj& r); // default copy assignment 527 ~ResourceObj(); 528#endif // ASSERT 529 530 public: 531 void* operator new(size_t size, allocation_type type, MEMFLAGS flags); 532 void* operator new [](size_t size, allocation_type type, MEMFLAGS flags); 533 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, 534 allocation_type type, MEMFLAGS flags); 535 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, 536 allocation_type type, MEMFLAGS flags); 537 538 void* operator new(size_t size, Arena *arena) { 539 address res = (address)arena->Amalloc(size); 540 DEBUG_ONLY(set_allocation_type(res, ARENA);) 541 return res; 542 } 543 544 void* operator new [](size_t size, Arena *arena) { 545 address res = (address)arena->Amalloc(size); 546 DEBUG_ONLY(set_allocation_type(res, ARENA);) 547 return res; 548 } 549 550 void* operator new(size_t size) { 551 address res = (address)resource_allocate_bytes(size); 552 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) 553 return res; 554 } 555 556 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) { 557 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); 558 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) 559 return res; 560 } 561 562 void* operator new [](size_t size) { 563 address res = (address)resource_allocate_bytes(size); 564 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) 565 return res; 566 } 567 568 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) { 569 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); 570 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) 571 return res; 572 } 573 574 void operator delete(void* p); 575 void operator delete [](void* p); 576}; 577 578// One of the following macros must be used when allocating an array 579// or object to determine whether it should reside in the C heap on in 580// the resource area. 581 582#define NEW_RESOURCE_ARRAY(type, size)\ 583 (type*) resource_allocate_bytes((size) * sizeof(type)) 584 585#define NEW_RESOURCE_ARRAY_IN_THREAD(thread, type, size)\ 586 (type*) resource_allocate_bytes(thread, (size) * sizeof(type)) 587 588#define REALLOC_RESOURCE_ARRAY(type, old, old_size, new_size)\ 589 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type), (new_size) * sizeof(type) ) 590 591#define FREE_RESOURCE_ARRAY(type, old, size)\ 592 resource_free_bytes((char*)(old), (size) * sizeof(type)) 593 594#define FREE_FAST(old)\ 595 /* nop */ 596 597#define NEW_RESOURCE_OBJ(type)\ 598 NEW_RESOURCE_ARRAY(type, 1) 599 600#define NEW_C_HEAP_ARRAY(type, size, memflags)\ 601 (type*) (AllocateHeap((size) * sizeof(type), memflags)) 602 603#define REALLOC_C_HEAP_ARRAY(type, old, size, memflags)\ 604 (type*) (ReallocateHeap((char*)old, (size) * sizeof(type), memflags)) 605 606#define FREE_C_HEAP_ARRAY(type, old, memflags) \ 607 FreeHeap((char*)(old), memflags) 608 609// allocate type in heap without calling ctor 610// WARNING: type must not have virtual functions!!! There is no way to initialize vtable. 611#define NEW_C_HEAP_OBJ(type, memflags)\ 612 NEW_C_HEAP_ARRAY(type, 1, memflags) 613 614#define NEW_C_HEAP_ARRAY2(type, size, memflags, pc)\ 615 (type*) (AllocateHeap((size) * sizeof(type), memflags, pc)) 616 617#define REALLOC_C_HEAP_ARRAY2(type, old, size, memflags, pc)\ 618 (type*) (ReallocateHeap((char*)old, (size) * sizeof(type), memflags, pc)) 619 620#define NEW_C_HEAP_ARRAY3(type, size, memflags, pc, allocfail) \ 621 (type*) AllocateHeap(size * sizeof(type), memflags, pc, allocfail); 622 623// !!! Attention, see comments above about the usage !!! 624 625// allocate type in heap and call ctor 626#define NEW_C_HEAP_OBJECT(objname, type, memflags, pc, allocfail)\ 627 { \ 628 objname = (type*)AllocateHeap(sizeof(type), memflags, pc, allocfail); \ 629 if (objname != NULL) ::new ((void *)objname) type(); \ 630 } 631 632// allocate array of type, call ctor for every element in the array 633#define NEW_C_HEAP_OBJECT_ARRAY(array_name, type, size, memflags, pc, allocfail) \ 634 { \ 635 array_name = (type*)AllocateHeap(size * sizeof(type), memflags, pc, allocfail); \ 636 if (array_name != NULL) { \ 637 for (int index = 0; index < size; index++) { \ 638 ::new ((void*)&array_name[index]) type(); \ 639 } \ 640 } \ 641 } 642 643// deallocate type in heap, call dtor 644#define FREE_C_HEAP_OBJECT(type, objname, memflags) \ 645 if (objname != NULL) { \ 646 ((type*)objname)->~type(); \ 647 FREE_C_HEAP_ARRAY(type, objname, memflags); \ 648 } 649 650// deallocate array of type with size, call dtor for every element in the array 651#define FREE_C_HEAP_OBJECT_ARRAY(type, array_name, size, memflags) \ 652 { \ 653 if (array_name != NULL) { \ 654 for (int index = 0; index < size; index++) { \ 655 ((type*)&array_name[index])->~type(); \ 656 } \ 657 FREE_C_HEAP_ARRAY(type, array_name, memflags); \ 658 } \ 659 } 660 661extern bool warn_new_operator; 662 663// for statistics 664#ifndef PRODUCT 665class AllocStats : StackObj { 666 julong start_mallocs, start_frees; 667 julong start_malloc_bytes, start_mfree_bytes, start_res_bytes; 668 public: 669 AllocStats(); 670 671 julong num_mallocs(); // since creation of receiver 672 julong alloc_bytes(); 673 julong num_frees(); 674 julong free_bytes(); 675 julong resource_bytes(); 676 void print(); 677}; 678#endif 679 680 681//------------------------------ReallocMark--------------------------------- 682// Code which uses REALLOC_RESOURCE_ARRAY should check an associated 683// ReallocMark, which is declared in the same scope as the reallocated 684// pointer. Any operation that could __potentially__ cause a reallocation 685// should check the ReallocMark. 686class ReallocMark: public StackObj { 687protected: 688 NOT_PRODUCT(int _nesting;) 689 690public: 691 ReallocMark() PRODUCT_RETURN; 692 void check() PRODUCT_RETURN; 693}; 694 695// Helper class to allocate arrays that may become large. 696// Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit 697// and uses mapped memory for larger allocations. 698// Most OS mallocs do something similar but Solaris malloc does not revert 699// to mapped memory for large allocations. By default ArrayAllocatorMallocLimit 700// is set so that we always use malloc except for Solaris where we set the 701// limit to get mapped memory. 702template <class E, MEMFLAGS F> 703class ArrayAllocator : StackObj { 704 char* _addr; 705 bool _use_malloc; 706 size_t _size; 707 public: 708 ArrayAllocator() : _addr(NULL), _use_malloc(false), _size(0) { } 709 ~ArrayAllocator() { free(); } 710 E* allocate(size_t length); 711 void free(); 712}; 713 714#endif // SHARE_VM_MEMORY_ALLOCATION_HPP 715