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 56 class AllocFailStrategy { 57 public: 58 enum AllocFailEnum { EXIT_OOM, RETURN_NULL }; 59 }; 60 typedef 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 _OBJ variants 90 // of the NEW/FREE_C_HEAP macros are used for alloc/dealloc simple 91 // objects which are not inherited from CHeapObj, note constructor and 92 // destructor are not called. The preferable way to allocate objects 93 // is using the 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 must pay attention to calling destructors 98 // at needed. 99 // 100 // NEW_RESOURCE_ARRAY(type, size) 101 // NEW_RESOURCE_OBJ(type) 102 // NEW_C_HEAP_ARRAY(type, size) 103 // NEW_C_HEAP_OBJ(type, memflags) 104 // FREE_C_HEAP_ARRAY(type, old, memflags) 105 // FREE_C_HEAP_OBJ(objname, type, memflags) 106 // char* AllocateHeap(size_t size, const char* name); 107 // void FreeHeap(void* p); 108 // 109 // C-heap allocation can be traced using +PrintHeapAllocation. 110 // malloc and free should therefore never called directly. 111 112 // Base class for objects allocated in the C-heap. 113 114 // In non product mode we introduce a super class for all allocation classes 115 // that supports printing. 116 // We avoid the superclass in product mode since some C++ compilers add 117 // a word overhead for empty super classes. 118 119 #ifdef PRODUCT 120 #define ALLOCATION_SUPER_CLASS_SPEC 121 #else 122 #define ALLOCATION_SUPER_CLASS_SPEC : public AllocatedObj 123 class AllocatedObj { 124 public: 125 // Printing support 126 void print() const; 127 void print_value() const; 128 129 virtual void print_on(outputStream* st) const; 130 virtual void print_value_on(outputStream* st) const; 131 }; 132 #endif 133 134 135 /* 136 * MemoryType bitmap layout: 137 * | 16 15 14 13 12 11 10 09 | 08 07 06 05 | 04 03 02 01 | 138 * | memory type | object | reserved | 139 * | | type | | 140 */ 141 enum MemoryType { 142 // Memory type by sub systems. It occupies lower byte. 143 mtNone = 0x0000, // undefined 144 mtClass = 0x0100, // memory class for Java classes 145 mtThread = 0x0200, // memory for thread objects 146 mtThreadStack = 0x0300, 147 mtCode = 0x0400, // memory for generated code 148 mtGC = 0x0500, // memory for GC 149 mtCompiler = 0x0600, // memory for compiler 150 mtInternal = 0x0700, // memory used by VM, but does not belong to 151 // any of above categories, and not used for 152 // native memory tracking 153 mtOther = 0x0800, // memory not used by VM 154 mtSymbol = 0x0900, // symbol 155 mtNMT = 0x0A00, // memory used by native memory tracking 156 mtChunk = 0x0B00, // chunk that holds content of arenas 157 mtJavaHeap = 0x0C00, // Java heap 158 mtClassShared = 0x0D00, // class data sharing 159 mtTest = 0x0E00, // Test type for verifying NMT 160 mt_number_of_types = 0x000E, // number of memory types (mtDontTrack 161 // is not included as validate type) 162 mtDontTrack = 0x0F00, // memory we do not or cannot track 163 mt_masks = 0x7F00, 164 165 // object type mask 166 otArena = 0x0010, // an arena object 167 otNMTRecorder = 0x0020, // memory recorder object 168 ot_masks = 0x00F0 169 }; 170 171 #define IS_MEMORY_TYPE(flags, type) ((flags & mt_masks) == type) 172 #define HAS_VALID_MEMORY_TYPE(flags)((flags & mt_masks) != mtNone) 173 #define FLAGS_TO_MEMORY_TYPE(flags) (flags & mt_masks) 174 175 #define IS_ARENA_OBJ(flags) ((flags & ot_masks) == otArena) 176 #define IS_NMT_RECORDER(flags) ((flags & ot_masks) == otNMTRecorder) 177 #define NMT_CAN_TRACK(flags) (!IS_NMT_RECORDER(flags) && !(IS_MEMORY_TYPE(flags, mtDontTrack))) 178 179 typedef unsigned short MEMFLAGS; 180 181 #if INCLUDE_NMT 182 183 extern bool NMT_track_callsite; 184 185 #else 186 187 const bool NMT_track_callsite = false; 188 189 #endif // INCLUDE_NMT 190 191 // debug build does not inline 192 #if defined(_NMT_NOINLINE_) 193 #define CURRENT_PC (NMT_track_callsite ? os::get_caller_pc(1) : 0) 194 #define CALLER_PC (NMT_track_callsite ? os::get_caller_pc(2) : 0) 195 #define CALLER_CALLER_PC (NMT_track_callsite ? os::get_caller_pc(3) : 0) 196 #else 197 #define CURRENT_PC (NMT_track_callsite? os::get_caller_pc(0) : 0) 198 #define CALLER_PC (NMT_track_callsite ? os::get_caller_pc(1) : 0) 199 #define CALLER_CALLER_PC (NMT_track_callsite ? os::get_caller_pc(2) : 0) 200 #endif 201 202 203 204 template <MEMFLAGS F> class CHeapObj ALLOCATION_SUPER_CLASS_SPEC { 205 public: 206 _NOINLINE_ void* operator new(size_t size, address caller_pc = 0); 207 _NOINLINE_ void* operator new (size_t size, const std::nothrow_t& nothrow_constant, 208 address caller_pc = 0); 209 _NOINLINE_ void* operator new [](size_t size, address caller_pc = 0); 210 _NOINLINE_ void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, 211 address caller_pc = 0); 212 void operator delete(void* p); 213 void operator delete [] (void* p); 214 }; 215 216 // Base class for objects allocated on the stack only. 217 // Calling new or delete will result in fatal error. 218 219 class StackObj ALLOCATION_SUPER_CLASS_SPEC { 220 private: 221 void* operator new(size_t size); 222 void operator delete(void* p); 223 void* operator new [](size_t size); 224 void operator delete [](void* p); 225 }; 226 227 // Base class for objects used as value objects. 228 // Calling new or delete will result in fatal error. 229 // 230 // Portability note: Certain compilers (e.g. gcc) will 231 // always make classes bigger if it has a superclass, even 232 // if the superclass does not have any virtual methods or 233 // instance fields. The HotSpot implementation relies on this 234 // not to happen. So never make a ValueObj class a direct subclass 235 // of this object, but use the VALUE_OBJ_CLASS_SPEC class instead, e.g., 236 // like this: 237 // 238 // class A VALUE_OBJ_CLASS_SPEC { 239 // ... 240 // } 241 // 242 // With gcc and possible other compilers the VALUE_OBJ_CLASS_SPEC can 243 // be defined as a an empty string "". 244 // 245 class _ValueObj { 246 private: 247 void* operator new(size_t size); 248 void operator delete(void* p); 249 void* operator new [](size_t size); 250 void operator delete [](void* p); 251 }; 252 253 254 // Base class for objects stored in Metaspace. 255 // Calling delete will result in fatal error. 256 // 257 // Do not inherit from something with a vptr because this class does 258 // not introduce one. This class is used to allocate both shared read-only 259 // and shared read-write classes. 260 // 261 262 class ClassLoaderData; 263 264 class MetaspaceObj { 265 public: 266 bool is_metadata() const; 267 bool is_metaspace_object() const; // more specific test but slower 268 bool is_shared() const; 269 void print_address_on(outputStream* st) const; // nonvirtual address printing 270 271 #define METASPACE_OBJ_TYPES_DO(f) \ 272 f(Unknown) \ 273 f(Class) \ 274 f(Symbol) \ 275 f(TypeArrayU1) \ 276 f(TypeArrayU2) \ 277 f(TypeArrayU4) \ 278 f(TypeArrayU8) \ 279 f(TypeArrayOther) \ 280 f(Method) \ 281 f(ConstMethod) \ 282 f(MethodData) \ 283 f(ConstantPool) \ 284 f(ConstantPoolCache) \ 285 f(Annotation) \ 286 f(MethodCounters) 287 288 #define METASPACE_OBJ_TYPE_DECLARE(name) name ## Type, 289 #define METASPACE_OBJ_TYPE_NAME_CASE(name) case name ## Type: return #name; 290 291 enum Type { 292 // Types are MetaspaceObj::ClassType, MetaspaceObj::SymbolType, etc 293 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_DECLARE) 294 _number_of_types 295 }; 296 297 static const char * type_name(Type type) { 298 switch(type) { 299 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_NAME_CASE) 300 default: 301 ShouldNotReachHere(); 302 return NULL; 303 } 304 } 305 306 static MetaspaceObj::Type array_type(size_t elem_size) { 307 switch (elem_size) { 308 case 1: return TypeArrayU1Type; 309 case 2: return TypeArrayU2Type; 310 case 4: return TypeArrayU4Type; 311 case 8: return TypeArrayU8Type; 312 default: 313 return TypeArrayOtherType; 314 } 315 } 316 317 void* operator new(size_t size, ClassLoaderData* loader_data, 318 size_t word_size, bool read_only, 319 Type type, Thread* thread); 320 // can't use TRAPS from this header file. 321 void operator delete(void* p) { ShouldNotCallThis(); } 322 }; 323 324 // Base class for classes that constitute name spaces. 325 326 class AllStatic { 327 public: 328 AllStatic() { ShouldNotCallThis(); } 329 ~AllStatic() { ShouldNotCallThis(); } 330 }; 331 332 333 //------------------------------Chunk------------------------------------------ 334 // Linked list of raw memory chunks 335 class Chunk: CHeapObj<mtChunk> { 336 friend class VMStructs; 337 338 protected: 339 Chunk* _next; // Next Chunk in list 340 const size_t _len; // Size of this Chunk 341 public: 342 void* operator new(size_t size, size_t length); 343 void operator delete(void* p); 344 Chunk(size_t length); 345 346 enum { 347 // default sizes; make them slightly smaller than 2**k to guard against 348 // buddy-system style malloc implementations 349 #ifdef _LP64 350 slack = 40, // [RGV] Not sure if this is right, but make it 351 // a multiple of 8. 352 #else 353 slack = 20, // suspected sizeof(Chunk) + internal malloc headers 354 #endif 355 356 init_size = 1*K - slack, // Size of first chunk 357 medium_size= 10*K - slack, // Size of medium-sized chunk 358 size = 32*K - slack, // Default size of an Arena chunk (following the first) 359 non_pool_size = init_size + 32 // An initial size which is not one of above 360 }; 361 362 void chop(); // Chop this chunk 363 void next_chop(); // Chop next chunk 364 static size_t aligned_overhead_size(void) { return ARENA_ALIGN(sizeof(Chunk)); } 365 static size_t aligned_overhead_size(size_t byte_size) { return ARENA_ALIGN(byte_size); } 366 367 size_t length() const { return _len; } 368 Chunk* next() const { return _next; } 369 void set_next(Chunk* n) { _next = n; } 370 // Boundaries of data area (possibly unused) 371 char* bottom() const { return ((char*) this) + aligned_overhead_size(); } 372 char* top() const { return bottom() + _len; } 373 bool contains(char* p) const { return bottom() <= p && p <= top(); } 374 375 // Start the chunk_pool cleaner task 376 static void start_chunk_pool_cleaner_task(); 377 378 static void clean_chunk_pool(); 379 }; 380 381 //------------------------------Arena------------------------------------------ 382 // Fast allocation of memory 383 class Arena : public CHeapObj<mtNone|otArena> { 384 protected: 385 friend class ResourceMark; 386 friend class HandleMark; 387 friend class NoHandleMark; 388 friend class VMStructs; 389 390 Chunk *_first; // First chunk 391 Chunk *_chunk; // current chunk 392 char *_hwm, *_max; // High water mark and max in current chunk 393 // Get a new Chunk of at least size x 394 void* grow(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 395 size_t _size_in_bytes; // Size of arena (used for native memory tracking) 396 397 NOT_PRODUCT(static julong _bytes_allocated;) // total #bytes allocated since start 398 friend class AllocStats; 399 debug_only(void* malloc(size_t size);) 400 debug_only(void* internal_malloc_4(size_t x);) 401 NOT_PRODUCT(void inc_bytes_allocated(size_t x);) 402 403 void signal_out_of_memory(size_t request, const char* whence) const; 404 405 void check_for_overflow(size_t request, const char* whence) const { 406 if (UINTPTR_MAX - request < (uintptr_t)_hwm) { 407 signal_out_of_memory(request, whence); 408 } 409 } 410 411 public: 412 Arena(); 413 Arena(size_t init_size); 414 ~Arena(); 415 void destruct_contents(); 416 char* hwm() const { return _hwm; } 417 418 // new operators 419 void* operator new (size_t size); 420 void* operator new (size_t size, const std::nothrow_t& nothrow_constant); 421 422 // dynamic memory type tagging 423 void* operator new(size_t size, MEMFLAGS flags); 424 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags); 425 void operator delete(void* p); 426 427 // Fast allocate in the arena. Common case is: pointer test + increment. 428 void* Amalloc(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 429 assert(is_power_of_2(ARENA_AMALLOC_ALIGNMENT) , "should be a power of 2"); 430 x = ARENA_ALIGN(x); 431 debug_only(if (UseMallocOnly) return malloc(x);) 432 check_for_overflow(x, "Arena::Amalloc"); 433 NOT_PRODUCT(inc_bytes_allocated(x);) 434 if (_hwm + x > _max) { 435 return grow(x, alloc_failmode); 436 } else { 437 char *old = _hwm; 438 _hwm += x; 439 return old; 440 } 441 } 442 // Further assume size is padded out to words 443 void *Amalloc_4(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 444 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); 445 debug_only(if (UseMallocOnly) return malloc(x);) 446 check_for_overflow(x, "Arena::Amalloc_4"); 447 NOT_PRODUCT(inc_bytes_allocated(x);) 448 if (_hwm + x > _max) { 449 return grow(x, alloc_failmode); 450 } else { 451 char *old = _hwm; 452 _hwm += x; 453 return old; 454 } 455 } 456 457 // Allocate with 'double' alignment. It is 8 bytes on sparc. 458 // In other cases Amalloc_D() should be the same as Amalloc_4(). 459 void* Amalloc_D(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 460 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); 461 debug_only(if (UseMallocOnly) return malloc(x);) 462 #if defined(SPARC) && !defined(_LP64) 463 #define DALIGN_M1 7 464 size_t delta = (((size_t)_hwm + DALIGN_M1) & ~DALIGN_M1) - (size_t)_hwm; 465 x += delta; 466 #endif 467 check_for_overflow(x, "Arena::Amalloc_D"); 468 NOT_PRODUCT(inc_bytes_allocated(x);) 469 if (_hwm + x > _max) { 470 return grow(x, alloc_failmode); // grow() returns a result aligned >= 8 bytes. 471 } else { 472 char *old = _hwm; 473 _hwm += x; 474 #if defined(SPARC) && !defined(_LP64) 475 old += delta; // align to 8-bytes 476 #endif 477 return old; 478 } 479 } 480 481 // Fast delete in area. Common case is: NOP (except for storage reclaimed) 482 void Afree(void *ptr, size_t size) { 483 #ifdef ASSERT 484 if (ZapResourceArea) memset(ptr, badResourceValue, size); // zap freed memory 485 if (UseMallocOnly) return; 486 #endif 487 if (((char*)ptr) + size == _hwm) _hwm = (char*)ptr; 488 } 489 490 void *Arealloc( void *old_ptr, size_t old_size, size_t new_size, 491 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 492 493 // Move contents of this arena into an empty arena 494 Arena *move_contents(Arena *empty_arena); 495 496 // Determine if pointer belongs to this Arena or not. 497 bool contains( const void *ptr ) const; 498 499 // Total of all chunks in use (not thread-safe) 500 size_t used() const; 501 502 // Total # of bytes used 503 size_t size_in_bytes() const { return _size_in_bytes; }; 504 void set_size_in_bytes(size_t size); 505 506 static void free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) PRODUCT_RETURN; 507 static void free_all(char** start, char** end) PRODUCT_RETURN; 508 509 // how many arena instances 510 NOT_PRODUCT(static volatile jint _instance_count;) 511 private: 512 // Reset this Arena to empty, access will trigger grow if necessary 513 void reset(void) { 514 _first = _chunk = NULL; 515 _hwm = _max = NULL; 516 set_size_in_bytes(0); 517 } 518 }; 519 520 // One of the following macros must be used when allocating 521 // an array or object from an arena 522 #define NEW_ARENA_ARRAY(arena, type, size) \ 523 (type*) (arena)->Amalloc((size) * sizeof(type)) 524 525 #define REALLOC_ARENA_ARRAY(arena, type, old, old_size, new_size) \ 526 (type*) (arena)->Arealloc((char*)(old), (old_size) * sizeof(type), \ 527 (new_size) * sizeof(type) ) 528 529 #define FREE_ARENA_ARRAY(arena, type, old, size) \ 530 (arena)->Afree((char*)(old), (size) * sizeof(type)) 531 532 #define NEW_ARENA_OBJ(arena, type) \ 533 NEW_ARENA_ARRAY(arena, type, 1) 534 535 536 //%note allocation_1 537 extern char* resource_allocate_bytes(size_t size, 538 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 539 extern char* resource_allocate_bytes(Thread* thread, size_t size, 540 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 541 extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size, 542 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 543 extern void resource_free_bytes( char *old, size_t size ); 544 545 //---------------------------------------------------------------------- 546 // Base class for objects allocated in the resource area per default. 547 // Optionally, objects may be allocated on the C heap with 548 // new(ResourceObj::C_HEAP) Foo(...) or in an Arena with new (&arena) 549 // ResourceObj's can be allocated within other objects, but don't use 550 // new or delete (allocation_type is unknown). If new is used to allocate, 551 // use delete to deallocate. 552 class ResourceObj ALLOCATION_SUPER_CLASS_SPEC { 553 public: 554 enum allocation_type { STACK_OR_EMBEDDED = 0, RESOURCE_AREA, C_HEAP, ARENA, allocation_mask = 0x3 }; 555 static void set_allocation_type(address res, allocation_type type) NOT_DEBUG_RETURN; 556 #ifdef ASSERT 557 private: 558 // When this object is allocated on stack the new() operator is not 559 // called but garbage on stack may look like a valid allocation_type. 560 // Store negated 'this' pointer when new() is called to distinguish cases. 561 // Use second array's element for verification value to distinguish garbage. 562 uintptr_t _allocation_t[2]; 563 bool is_type_set() const; 564 public: 565 allocation_type get_allocation_type() const; 566 bool allocated_on_stack() const { return get_allocation_type() == STACK_OR_EMBEDDED; } 567 bool allocated_on_res_area() const { return get_allocation_type() == RESOURCE_AREA; } 568 bool allocated_on_C_heap() const { return get_allocation_type() == C_HEAP; } 569 bool allocated_on_arena() const { return get_allocation_type() == ARENA; } 570 ResourceObj(); // default construtor 571 ResourceObj(const ResourceObj& r); // default copy construtor 572 ResourceObj& operator=(const ResourceObj& r); // default copy assignment 573 ~ResourceObj(); 574 #endif // ASSERT 575 576 public: 577 void* operator new(size_t size, allocation_type type, MEMFLAGS flags); 578 void* operator new [](size_t size, allocation_type type, MEMFLAGS flags); 579 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, 580 allocation_type type, MEMFLAGS flags); 581 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, 582 allocation_type type, MEMFLAGS flags); 583 584 void* operator new(size_t size, Arena *arena) { 585 address res = (address)arena->Amalloc(size); 586 DEBUG_ONLY(set_allocation_type(res, ARENA);) 587 return res; 588 } 589 590 void* operator new [](size_t size, Arena *arena) { 591 address res = (address)arena->Amalloc(size); 592 DEBUG_ONLY(set_allocation_type(res, ARENA);) 593 return res; 594 } 595 596 void* operator new(size_t size) { 597 address res = (address)resource_allocate_bytes(size); 598 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) 599 return res; 600 } 601 602 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) { 603 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); 604 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) 605 return res; 606 } 607 608 void* operator new [](size_t size) { 609 address res = (address)resource_allocate_bytes(size); 610 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) 611 return res; 612 } 613 614 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) { 615 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); 616 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) 617 return res; 618 } 619 620 void operator delete(void* p); 621 void operator delete [](void* p); 622 }; 623 624 // One of the following macros must be used when allocating an array 625 // or object to determine whether it should reside in the C heap on in 626 // the resource area. 627 628 #define NEW_RESOURCE_ARRAY(type, size)\ 629 (type*) resource_allocate_bytes((size) * sizeof(type)) 630 631 #define NEW_RESOURCE_ARRAY_RETURN_NULL(type, size)\ 632 (type*) resource_allocate_bytes((size) * sizeof(type), AllocFailStrategy::RETURN_NULL) 633 634 #define NEW_RESOURCE_ARRAY_IN_THREAD(thread, type, size)\ 635 (type*) resource_allocate_bytes(thread, (size) * sizeof(type)) 636 637 #define REALLOC_RESOURCE_ARRAY(type, old, old_size, new_size)\ 638 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type), (new_size) * sizeof(type) ) 639 640 #define FREE_RESOURCE_ARRAY(type, old, size)\ 641 resource_free_bytes((char*)(old), (size) * sizeof(type)) 642 643 #define FREE_FAST(old)\ 644 /* nop */ 645 646 #define NEW_RESOURCE_OBJ(type)\ 647 NEW_RESOURCE_ARRAY(type, 1) 648 649 #define NEW_C_HEAP_ARRAY(type, size, memflags)\ 650 (type*) (AllocateHeap((size) * sizeof(type), memflags)) 651 652 #define REALLOC_C_HEAP_ARRAY(type, old, size, memflags)\ 653 (type*) (ReallocateHeap((char*)old, (size) * sizeof(type), memflags)) 654 655 #define FREE_C_HEAP_ARRAY(type, old, memflags) \ 656 FreeHeap((char*)(old), memflags) 657 658 #define NEW_C_HEAP_ARRAY2(type, size, memflags, pc)\ 659 (type*) (AllocateHeap((size) * sizeof(type), memflags, pc)) 660 661 #define REALLOC_C_HEAP_ARRAY2(type, old, size, memflags, pc)\ 662 (type*) (ReallocateHeap((char*)old, (size) * sizeof(type), memflags, pc)) 663 664 #define NEW_C_HEAP_ARRAY3(type, size, memflags, pc, allocfail) \ 665 (type*) AllocateHeap(size * sizeof(type), memflags, pc, allocfail) 666 667 // allocate type in heap without calling ctor 668 #define NEW_C_HEAP_OBJ(type, memflags)\ 669 NEW_C_HEAP_ARRAY(type, 1, memflags) 670 671 // deallocate obj of type in heap without calling dtor 672 #define FREE_C_HEAP_OBJ(objname, memflags)\ 673 FreeHeap((char*)objname, memflags); 674 675 // for statistics 676 #ifndef PRODUCT 677 class AllocStats : StackObj { 678 julong start_mallocs, start_frees; 679 julong start_malloc_bytes, start_mfree_bytes, start_res_bytes; 680 public: 681 AllocStats(); 682 683 julong num_mallocs(); // since creation of receiver 684 julong alloc_bytes(); 685 julong num_frees(); 686 julong free_bytes(); 687 julong resource_bytes(); 688 void print(); 689 }; 690 #endif 691 692 693 //------------------------------ReallocMark--------------------------------- 694 // Code which uses REALLOC_RESOURCE_ARRAY should check an associated 695 // ReallocMark, which is declared in the same scope as the reallocated 696 // pointer. Any operation that could __potentially__ cause a reallocation 697 // should check the ReallocMark. 698 class ReallocMark: public StackObj { 699 protected: 700 NOT_PRODUCT(int _nesting;) 701 702 public: 703 ReallocMark() PRODUCT_RETURN; 704 void check() PRODUCT_RETURN; 705 }; 706 707 // Helper class to allocate arrays that may become large. 708 // Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit 709 // and uses mapped memory for larger allocations. 710 // Most OS mallocs do something similar but Solaris malloc does not revert 711 // to mapped memory for large allocations. By default ArrayAllocatorMallocLimit 712 // is set so that we always use malloc except for Solaris where we set the 713 // limit to get mapped memory. 714 template <class E, MEMFLAGS F> 715 class ArrayAllocator : StackObj { 716 char* _addr; 717 bool _use_malloc; 718 size_t _size; 719 public: 720 ArrayAllocator() : _addr(NULL), _use_malloc(false), _size(0) { } 721 ~ArrayAllocator() { free(); } 722 E* allocate(size_t length); 723 void free(); 724 }; 725 726 #endif // SHARE_VM_MEMORY_ALLOCATION_HPP