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 mtTracing = 0x0F00, // memory used for Tracing 161 mt_number_of_types = 0x000F, // 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))) 179 180 typedef unsigned short MEMFLAGS; 181 182 #if INCLUDE_NMT 183 184 extern bool NMT_track_callsite; 185 186 #else 187 188 const bool NMT_track_callsite = false; 189 190 #endif // INCLUDE_NMT 191 192 // debug build does not inline 193 #if defined(_NMT_NOINLINE_) 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 202 203 204 205 template <MEMFLAGS F> class CHeapObj ALLOCATION_SUPER_CLASS_SPEC { 206 public: 207 _NOINLINE_ void* operator new(size_t size, address caller_pc = 0) throw(); 208 _NOINLINE_ void* operator new (size_t size, const std::nothrow_t& nothrow_constant, 209 address caller_pc = 0) throw(); 210 _NOINLINE_ void* operator new [](size_t size, address caller_pc = 0) throw(); 211 _NOINLINE_ void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, 212 address caller_pc = 0) throw(); 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. 219 220 class StackObj ALLOCATION_SUPER_CLASS_SPEC { 221 private: 222 void* operator new(size_t size) throw(); 223 void* operator new [](size_t size) throw(); 224 #ifdef __IBMCPP__ 225 public: 226 #endif 227 void operator delete(void* p); 228 void operator delete [](void* p); 229 }; 230 231 // Base class for objects used as value objects. 232 // Calling new or delete will result in fatal error. 233 // 234 // Portability note: Certain compilers (e.g. gcc) will 235 // always make classes bigger if it has a superclass, even 236 // if the superclass does not have any virtual methods or 237 // instance fields. The HotSpot implementation relies on this 238 // not to happen. So never make a ValueObj class a direct subclass 239 // of this object, but use the VALUE_OBJ_CLASS_SPEC class instead, e.g., 240 // like this: 241 // 242 // class A VALUE_OBJ_CLASS_SPEC { 243 // ... 244 // } 245 // 246 // With gcc and possible other compilers the VALUE_OBJ_CLASS_SPEC can 247 // be defined as a an empty string "". 248 // 249 class _ValueObj { 250 private: 251 void* operator new(size_t size) throw(); 252 void operator delete(void* p); 253 void* operator new [](size_t size) throw(); 254 void operator delete [](void* p); 255 }; 256 257 258 // Base class for objects stored in Metaspace. 259 // Calling delete will result in fatal error. 260 // 261 // Do not inherit from something with a vptr because this class does 262 // not introduce one. This class is used to allocate both shared read-only 263 // and shared read-write classes. 264 // 265 266 class ClassLoaderData; 267 268 class MetaspaceObj { 269 public: 270 bool is_metaspace_object() const; 271 bool is_shared() const; 272 void print_address_on(outputStream* st) const; // nonvirtual address printing 273 274 #define METASPACE_OBJ_TYPES_DO(f) \ 275 f(Unknown) \ 276 f(Class) \ 277 f(Symbol) \ 278 f(TypeArrayU1) \ 279 f(TypeArrayU2) \ 280 f(TypeArrayU4) \ 281 f(TypeArrayU8) \ 282 f(TypeArrayOther) \ 283 f(Method) \ 284 f(ConstMethod) \ 285 f(MethodData) \ 286 f(ConstantPool) \ 287 f(ConstantPoolCache) \ 288 f(Annotation) \ 289 f(MethodCounters) 290 291 #define METASPACE_OBJ_TYPE_DECLARE(name) name ## Type, 292 #define METASPACE_OBJ_TYPE_NAME_CASE(name) case name ## Type: return #name; 293 294 enum Type { 295 // Types are MetaspaceObj::ClassType, MetaspaceObj::SymbolType, etc 296 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_DECLARE) 297 _number_of_types 298 }; 299 300 static const char * type_name(Type type) { 301 switch(type) { 302 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_NAME_CASE) 303 default: 304 ShouldNotReachHere(); 305 return NULL; 306 } 307 } 308 309 static MetaspaceObj::Type array_type(size_t elem_size) { 310 switch (elem_size) { 311 case 1: return TypeArrayU1Type; 312 case 2: return TypeArrayU2Type; 313 case 4: return TypeArrayU4Type; 314 case 8: return TypeArrayU8Type; 315 default: 316 return TypeArrayOtherType; 317 } 318 } 319 320 void* operator new(size_t size, ClassLoaderData* loader_data, 321 size_t word_size, bool read_only, 322 Type type, Thread* thread) throw(); 323 // can't use TRAPS from this header file. 324 void operator delete(void* p) { ShouldNotCallThis(); } 325 }; 326 327 // Base class for classes that constitute name spaces. 328 329 class AllStatic { 330 public: 331 AllStatic() { ShouldNotCallThis(); } 332 ~AllStatic() { ShouldNotCallThis(); } 333 }; 334 335 336 //------------------------------Chunk------------------------------------------ 337 // Linked list of raw memory chunks 338 class Chunk: CHeapObj<mtChunk> { 339 friend class VMStructs; 340 341 protected: 342 Chunk* _next; // Next Chunk in list 343 const size_t _len; // Size of this Chunk 344 public: 345 void* operator new(size_t size, AllocFailType alloc_failmode, size_t length) throw(); 346 void operator delete(void* p); 347 Chunk(size_t length); 348 349 enum { 350 // default sizes; make them slightly smaller than 2**k to guard against 351 // buddy-system style malloc implementations 352 #ifdef _LP64 353 slack = 40, // [RGV] Not sure if this is right, but make it 354 // a multiple of 8. 355 #else 356 slack = 20, // suspected sizeof(Chunk) + internal malloc headers 357 #endif 358 359 tiny_size = 256 - slack, // Size of first chunk (tiny) 360 init_size = 1*K - slack, // Size of first chunk (normal aka small) 361 medium_size= 10*K - slack, // Size of medium-sized chunk 362 size = 32*K - slack, // Default size of an Arena chunk (following the first) 363 non_pool_size = init_size + 32 // An initial size which is not one of above 364 }; 365 366 void chop(); // Chop this chunk 367 void next_chop(); // Chop next chunk 368 static size_t aligned_overhead_size(void) { return ARENA_ALIGN(sizeof(Chunk)); } 369 static size_t aligned_overhead_size(size_t byte_size) { return ARENA_ALIGN(byte_size); } 370 371 size_t length() const { return _len; } 372 Chunk* next() const { return _next; } 373 void set_next(Chunk* n) { _next = n; } 374 // Boundaries of data area (possibly unused) 375 char* bottom() const { return ((char*) this) + aligned_overhead_size(); } 376 char* top() const { return bottom() + _len; } 377 bool contains(char* p) const { return bottom() <= p && p <= top(); } 378 379 // Start the chunk_pool cleaner task 380 static void start_chunk_pool_cleaner_task(); 381 382 static void clean_chunk_pool(); 383 }; 384 385 //------------------------------Arena------------------------------------------ 386 // Fast allocation of memory 387 class Arena : public CHeapObj<mtNone|otArena> { 388 protected: 389 friend class ResourceMark; 390 friend class HandleMark; 391 friend class NoHandleMark; 392 friend class VMStructs; 393 394 Chunk *_first; // First chunk 395 Chunk *_chunk; // current chunk 396 char *_hwm, *_max; // High water mark and max in current chunk 397 // Get a new Chunk of at least size x 398 void* grow(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 399 size_t _size_in_bytes; // Size of arena (used for native memory tracking) 400 401 NOT_PRODUCT(static julong _bytes_allocated;) // total #bytes allocated since start 402 friend class AllocStats; 403 debug_only(void* malloc(size_t size);) 404 debug_only(void* internal_malloc_4(size_t x);) 405 NOT_PRODUCT(void inc_bytes_allocated(size_t x);) 406 407 void signal_out_of_memory(size_t request, const char* whence) const; 408 409 void check_for_overflow(size_t request, const char* whence) const { 410 if (UINTPTR_MAX - request < (uintptr_t)_hwm) { 411 signal_out_of_memory(request, whence); 412 } 413 } 414 415 public: 416 Arena(); 417 Arena(size_t init_size); 418 ~Arena(); 419 void destruct_contents(); 420 char* hwm() const { return _hwm; } 421 422 // new operators 423 void* operator new (size_t size) throw(); 424 void* operator new (size_t size, const std::nothrow_t& nothrow_constant) throw(); 425 426 // dynamic memory type tagging 427 void* operator new(size_t size, MEMFLAGS flags) throw(); 428 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags) throw(); 429 void operator delete(void* p); 430 431 // Fast allocate in the arena. Common case is: pointer test + increment. 432 void* Amalloc(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 433 assert(is_power_of_2(ARENA_AMALLOC_ALIGNMENT) , "should be a power of 2"); 434 x = ARENA_ALIGN(x); 435 debug_only(if (UseMallocOnly) return malloc(x);) 436 check_for_overflow(x, "Arena::Amalloc"); 437 NOT_PRODUCT(inc_bytes_allocated(x);) 438 if (_hwm + x > _max) { 439 return grow(x, alloc_failmode); 440 } else { 441 char *old = _hwm; 442 _hwm += x; 443 return old; 444 } 445 } 446 // Further assume size is padded out to words 447 void *Amalloc_4(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 448 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); 449 debug_only(if (UseMallocOnly) return malloc(x);) 450 check_for_overflow(x, "Arena::Amalloc_4"); 451 NOT_PRODUCT(inc_bytes_allocated(x);) 452 if (_hwm + x > _max) { 453 return grow(x, alloc_failmode); 454 } else { 455 char *old = _hwm; 456 _hwm += x; 457 return old; 458 } 459 } 460 461 // Allocate with 'double' alignment. It is 8 bytes on sparc. 462 // In other cases Amalloc_D() should be the same as Amalloc_4(). 463 void* Amalloc_D(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { 464 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); 465 debug_only(if (UseMallocOnly) return malloc(x);) 466 #if defined(SPARC) && !defined(_LP64) 467 #define DALIGN_M1 7 468 size_t delta = (((size_t)_hwm + DALIGN_M1) & ~DALIGN_M1) - (size_t)_hwm; 469 x += delta; 470 #endif 471 check_for_overflow(x, "Arena::Amalloc_D"); 472 NOT_PRODUCT(inc_bytes_allocated(x);) 473 if (_hwm + x > _max) { 474 return grow(x, alloc_failmode); // grow() returns a result aligned >= 8 bytes. 475 } else { 476 char *old = _hwm; 477 _hwm += x; 478 #if defined(SPARC) && !defined(_LP64) 479 old += delta; // align to 8-bytes 480 #endif 481 return old; 482 } 483 } 484 485 // Fast delete in area. Common case is: NOP (except for storage reclaimed) 486 void Afree(void *ptr, size_t size) { 487 #ifdef ASSERT 488 if (ZapResourceArea) memset(ptr, badResourceValue, size); // zap freed memory 489 if (UseMallocOnly) return; 490 #endif 491 if (((char*)ptr) + size == _hwm) _hwm = (char*)ptr; 492 } 493 494 void *Arealloc( void *old_ptr, size_t old_size, size_t new_size, 495 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 496 497 // Move contents of this arena into an empty arena 498 Arena *move_contents(Arena *empty_arena); 499 500 // Determine if pointer belongs to this Arena or not. 501 bool contains( const void *ptr ) const; 502 503 // Total of all chunks in use (not thread-safe) 504 size_t used() const; 505 506 // Total # of bytes used 507 size_t size_in_bytes() const { return _size_in_bytes; }; 508 void set_size_in_bytes(size_t size); 509 510 static void free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) PRODUCT_RETURN; 511 static void free_all(char** start, char** end) PRODUCT_RETURN; 512 513 // how many arena instances 514 NOT_PRODUCT(static volatile jint _instance_count;) 515 private: 516 // Reset this Arena to empty, access will trigger grow if necessary 517 void reset(void) { 518 _first = _chunk = NULL; 519 _hwm = _max = NULL; 520 set_size_in_bytes(0); 521 } 522 }; 523 524 // One of the following macros must be used when allocating 525 // an array or object from an arena 526 #define NEW_ARENA_ARRAY(arena, type, size) \ 527 (type*) (arena)->Amalloc((size) * sizeof(type)) 528 529 #define REALLOC_ARENA_ARRAY(arena, type, old, old_size, new_size) \ 530 (type*) (arena)->Arealloc((char*)(old), (old_size) * sizeof(type), \ 531 (new_size) * sizeof(type) ) 532 533 #define FREE_ARENA_ARRAY(arena, type, old, size) \ 534 (arena)->Afree((char*)(old), (size) * sizeof(type)) 535 536 #define NEW_ARENA_OBJ(arena, type) \ 537 NEW_ARENA_ARRAY(arena, type, 1) 538 539 540 //%note allocation_1 541 extern char* resource_allocate_bytes(size_t size, 542 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 543 extern char* resource_allocate_bytes(Thread* thread, size_t size, 544 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 545 extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size, 546 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); 547 extern void resource_free_bytes( char *old, size_t size ); 548 549 //---------------------------------------------------------------------- 550 // Base class for objects allocated in the resource area per default. 551 // Optionally, objects may be allocated on the C heap with 552 // new(ResourceObj::C_HEAP) Foo(...) or in an Arena with new (&arena) 553 // ResourceObj's can be allocated within other objects, but don't use 554 // new or delete (allocation_type is unknown). If new is used to allocate, 555 // use delete to deallocate. 556 class ResourceObj ALLOCATION_SUPER_CLASS_SPEC { 557 public: 558 enum allocation_type { STACK_OR_EMBEDDED = 0, RESOURCE_AREA, C_HEAP, ARENA, allocation_mask = 0x3 }; 559 static void set_allocation_type(address res, allocation_type type) NOT_DEBUG_RETURN; 560 #ifdef ASSERT 561 private: 562 // When this object is allocated on stack the new() operator is not 563 // called but garbage on stack may look like a valid allocation_type. 564 // Store negated 'this' pointer when new() is called to distinguish cases. 565 // Use second array's element for verification value to distinguish garbage. 566 uintptr_t _allocation_t[2]; 567 bool is_type_set() const; 568 public: 569 allocation_type get_allocation_type() const; 570 bool allocated_on_stack() const { return get_allocation_type() == STACK_OR_EMBEDDED; } 571 bool allocated_on_res_area() const { return get_allocation_type() == RESOURCE_AREA; } 572 bool allocated_on_C_heap() const { return get_allocation_type() == C_HEAP; } 573 bool allocated_on_arena() const { return get_allocation_type() == ARENA; } 574 ResourceObj(); // default construtor 575 ResourceObj(const ResourceObj& r); // default copy construtor 576 ResourceObj& operator=(const ResourceObj& r); // default copy assignment 577 ~ResourceObj(); 578 #endif // ASSERT 579 580 public: 581 void* operator new(size_t size, allocation_type type, MEMFLAGS flags) throw(); 582 void* operator new [](size_t size, allocation_type type, MEMFLAGS flags) throw(); 583 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, 584 allocation_type type, MEMFLAGS flags) throw(); 585 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, 586 allocation_type type, MEMFLAGS flags) throw(); 587 588 void* operator new(size_t size, Arena *arena) throw() { 589 address res = (address)arena->Amalloc(size); 590 DEBUG_ONLY(set_allocation_type(res, ARENA);) 591 return res; 592 } 593 594 void* operator new [](size_t size, Arena *arena) throw() { 595 address res = (address)arena->Amalloc(size); 596 DEBUG_ONLY(set_allocation_type(res, ARENA);) 597 return res; 598 } 599 600 void* operator new(size_t size) throw() { 601 address res = (address)resource_allocate_bytes(size); 602 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) 603 return res; 604 } 605 606 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() { 607 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); 608 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) 609 return res; 610 } 611 612 void* operator new [](size_t size) throw() { 613 address res = (address)resource_allocate_bytes(size); 614 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) 615 return res; 616 } 617 618 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) throw() { 619 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); 620 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) 621 return res; 622 } 623 624 void operator delete(void* p); 625 void operator delete [](void* p); 626 }; 627 628 // One of the following macros must be used when allocating an array 629 // or object to determine whether it should reside in the C heap on in 630 // the resource area. 631 632 #define NEW_RESOURCE_ARRAY(type, size)\ 633 (type*) resource_allocate_bytes((size) * sizeof(type)) 634 635 #define NEW_RESOURCE_ARRAY_RETURN_NULL(type, size)\ 636 (type*) resource_allocate_bytes((size) * sizeof(type), AllocFailStrategy::RETURN_NULL) 637 638 #define NEW_RESOURCE_ARRAY_IN_THREAD(thread, type, size)\ 639 (type*) resource_allocate_bytes(thread, (size) * sizeof(type)) 640 641 #define NEW_RESOURCE_ARRAY_IN_THREAD_RETURN_NULL(thread, type, size)\ 642 (type*) resource_allocate_bytes(thread, (size) * sizeof(type), AllocFailStrategy::RETURN_NULL) 643 644 #define REALLOC_RESOURCE_ARRAY(type, old, old_size, new_size)\ 645 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type), (new_size) * sizeof(type)) 646 647 #define REALLOC_RESOURCE_ARRAY_RETURN_NULL(type, old, old_size, new_size)\ 648 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type),\ 649 (new_size) * sizeof(type), AllocFailStrategy::RETURN_NULL) 650 651 #define FREE_RESOURCE_ARRAY(type, old, size)\ 652 resource_free_bytes((char*)(old), (size) * sizeof(type)) 653 654 #define FREE_FAST(old)\ 655 /* nop */ 656 657 #define NEW_RESOURCE_OBJ(type)\ 658 NEW_RESOURCE_ARRAY(type, 1) 659 660 #define NEW_RESOURCE_OBJ_RETURN_NULL(type)\ 661 NEW_RESOURCE_ARRAY_RETURN_NULL(type, 1) 662 663 #define NEW_C_HEAP_ARRAY3(type, size, memflags, pc, allocfail)\ 664 (type*) AllocateHeap((size) * sizeof(type), memflags, pc, allocfail) 665 666 #define NEW_C_HEAP_ARRAY2(type, size, memflags, pc)\ 667 (type*) (AllocateHeap((size) * sizeof(type), memflags, pc)) 668 669 #define NEW_C_HEAP_ARRAY(type, size, memflags)\ 670 (type*) (AllocateHeap((size) * sizeof(type), memflags)) 671 672 #define NEW_C_HEAP_ARRAY2_RETURN_NULL(type, size, memflags, pc)\ 673 NEW_C_HEAP_ARRAY3(type, (size), memflags, pc, AllocFailStrategy::RETURN_NULL) 674 675 #define NEW_C_HEAP_ARRAY_RETURN_NULL(type, size, memflags)\ 676 NEW_C_HEAP_ARRAY3(type, (size), memflags, (address)0, AllocFailStrategy::RETURN_NULL) 677 678 #define REALLOC_C_HEAP_ARRAY(type, old, size, memflags)\ 679 (type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags)) 680 681 #define REALLOC_C_HEAP_ARRAY_RETURN_NULL(type, old, size, memflags)\ 682 (type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags, AllocFailStrategy::RETURN_NULL)) 683 684 #define FREE_C_HEAP_ARRAY(type, old, memflags) \ 685 FreeHeap((char*)(old), memflags) 686 687 // allocate type in heap without calling ctor 688 #define NEW_C_HEAP_OBJ(type, memflags)\ 689 NEW_C_HEAP_ARRAY(type, 1, memflags) 690 691 #define NEW_C_HEAP_OBJ_RETURN_NULL(type, memflags)\ 692 NEW_C_HEAP_ARRAY_RETURN_NULL(type, 1, memflags) 693 694 // deallocate obj of type in heap without calling dtor 695 #define FREE_C_HEAP_OBJ(objname, memflags)\ 696 FreeHeap((char*)objname, memflags); 697 698 // for statistics 699 #ifndef PRODUCT 700 class AllocStats : StackObj { 701 julong start_mallocs, start_frees; 702 julong start_malloc_bytes, start_mfree_bytes, start_res_bytes; 703 public: 704 AllocStats(); 705 706 julong num_mallocs(); // since creation of receiver 707 julong alloc_bytes(); 708 julong num_frees(); 709 julong free_bytes(); 710 julong resource_bytes(); 711 void print(); 712 }; 713 #endif 714 715 716 //------------------------------ReallocMark--------------------------------- 717 // Code which uses REALLOC_RESOURCE_ARRAY should check an associated 718 // ReallocMark, which is declared in the same scope as the reallocated 719 // pointer. Any operation that could __potentially__ cause a reallocation 720 // should check the ReallocMark. 721 class ReallocMark: public StackObj { 722 protected: 723 NOT_PRODUCT(int _nesting;) 724 725 public: 726 ReallocMark() PRODUCT_RETURN; 727 void check() PRODUCT_RETURN; 728 }; 729 730 // Helper class to allocate arrays that may become large. 731 // Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit 732 // and uses mapped memory for larger allocations. 733 // Most OS mallocs do something similar but Solaris malloc does not revert 734 // to mapped memory for large allocations. By default ArrayAllocatorMallocLimit 735 // is set so that we always use malloc except for Solaris where we set the 736 // limit to get mapped memory. 737 template <class E, MEMFLAGS F> 738 class ArrayAllocator VALUE_OBJ_CLASS_SPEC { 739 char* _addr; 740 bool _use_malloc; 741 size_t _size; 742 bool _free_in_destructor; 743 public: 744 ArrayAllocator(bool free_in_destructor = true) : 745 _addr(NULL), _use_malloc(false), _size(0), _free_in_destructor(free_in_destructor) { } 746 747 ~ArrayAllocator() { 748 if (_free_in_destructor) { 749 free(); 750 } 751 } 752 753 E* allocate(size_t length); 754 void free(); 755 }; 756 757 #endif // SHARE_VM_MEMORY_ALLOCATION_HPP