1 /*
2 * Copyright (c) 1997, 2014, 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 #if defined _WINDOWS && _MSC_VER >= 1900
39 // 'noexcept' used with no exception handling mode specified; termination on exception is not guaranteed. Specify /EHsc
40 #pragma warning( disable : 4577 )
41 #endif
42
43 #include <new>
44
45 #define ARENA_ALIGN_M1 (((size_t)(ARENA_AMALLOC_ALIGNMENT)) - 1)
46 #define ARENA_ALIGN_MASK (~((size_t)ARENA_ALIGN_M1))
47 #define ARENA_ALIGN(x) ((((size_t)(x)) + ARENA_ALIGN_M1) & ARENA_ALIGN_MASK)
48
49
50 // noinline attribute
51 #ifdef _WINDOWS
52 #define _NOINLINE_ __declspec(noinline)
53 #else
54 #if __GNUC__ < 3 // gcc 2.x does not support noinline attribute
55 #define _NOINLINE_
56 #else
57 #define _NOINLINE_ __attribute__ ((noinline))
58 #endif
59 #endif
60
61 class AllocFailStrategy {
62 public:
63 enum AllocFailEnum { EXIT_OOM, RETURN_NULL };
64 };
65 typedef AllocFailStrategy::AllocFailEnum AllocFailType;
66
67 // All classes in the virtual machine must be subclassed
68 // by one of the following allocation classes:
69 //
70 // For objects allocated in the resource area (see resourceArea.hpp).
71 // - ResourceObj
72 //
73 // For objects allocated in the C-heap (managed by: free & malloc).
74 // - CHeapObj
75 //
76 // For objects allocated on the stack.
77 // - StackObj
78 //
79 // For embedded objects.
80 // - ValueObj
81 //
82 // For classes used as name spaces.
83 // - AllStatic
84 //
85 // For classes in Metaspace (class data)
86 // - MetaspaceObj
87 //
88 // The printable subclasses are used for debugging and define virtual
89 // member functions for printing. Classes that avoid allocating the
90 // vtbl entries in the objects should therefore not be the printable
91 // subclasses.
92 //
93 // The following macros and function should be used to allocate memory
94 // directly in the resource area or in the C-heap, The _OBJ variants
95 // of the NEW/FREE_C_HEAP macros are used for alloc/dealloc simple
96 // objects which are not inherited from CHeapObj, note constructor and
97 // destructor are not called. The preferable way to allocate objects
98 // is using the new operator.
99 //
100 // WARNING: The array variant must only be used for a homogenous array
101 // where all objects are of the exact type specified. If subtypes are
102 // stored in the array then must pay attention to calling destructors
103 // at needed.
104 //
105 // NEW_RESOURCE_ARRAY(type, size)
106 // NEW_RESOURCE_OBJ(type)
107 // NEW_C_HEAP_ARRAY(type, size)
108 // NEW_C_HEAP_OBJ(type, memflags)
109 // FREE_C_HEAP_ARRAY(type, old)
110 // FREE_C_HEAP_OBJ(objname, type, memflags)
111 // char* AllocateHeap(size_t size, const char* name);
112 // void FreeHeap(void* p);
113 //
114 // C-heap allocation can be traced using +PrintHeapAllocation.
115 // malloc and free should therefore never called directly.
116
117 // Base class for objects allocated in the C-heap.
118
119 // In non product mode we introduce a super class for all allocation classes
120 // that supports printing.
121 // We avoid the superclass in product mode since some C++ compilers add
122 // a word overhead for empty super classes.
123
124 #ifdef PRODUCT
125 #define ALLOCATION_SUPER_CLASS_SPEC
126 #else
127 #define ALLOCATION_SUPER_CLASS_SPEC : public AllocatedObj
128 class AllocatedObj {
129 public:
130 // Printing support
131 void print() const;
132 void print_value() const;
133
134 virtual void print_on(outputStream* st) const;
135 virtual void print_value_on(outputStream* st) const;
136 };
137 #endif
138
139
140 /*
141 * Memory types
142 */
143 enum MemoryType {
144 // Memory type by sub systems. It occupies lower byte.
145 mtJavaHeap = 0x00, // Java heap
146 mtClass = 0x01, // memory class for Java classes
147 mtThread = 0x02, // memory for thread objects
148 mtThreadStack = 0x03,
149 mtCode = 0x04, // memory for generated code
150 mtGC = 0x05, // memory for GC
151 mtCompiler = 0x06, // memory for compiler
152 mtInternal = 0x07, // memory used by VM, but does not belong to
153 // any of above categories, and not used for
154 // native memory tracking
155 mtOther = 0x08, // memory not used by VM
156 mtSymbol = 0x09, // symbol
157 mtNMT = 0x0A, // memory used by native memory tracking
158 mtClassShared = 0x0B, // class data sharing
159 mtChunk = 0x0C, // chunk that holds content of arenas
160 mtTest = 0x0D, // Test type for verifying NMT
161 mtTracing = 0x0E, // memory used for Tracing
162 mtLogging = 0x0F, // memory for logging
163 mtNone = 0x10, // undefined
164 mt_number_of_types = 0x11 // number of memory types (mtDontTrack
165 // is not included as validate type)
166 };
167
168 typedef MemoryType MEMFLAGS;
169
170
171 #if INCLUDE_NMT
172
173 extern bool NMT_track_callsite;
174
175 #else
176
177 const bool NMT_track_callsite = false;
178
179 #endif // INCLUDE_NMT
180
181 class NativeCallStack;
182
183
184 template <MEMFLAGS F> class CHeapObj ALLOCATION_SUPER_CLASS_SPEC {
185 public:
186 _NOINLINE_ void* operator new(size_t size, const NativeCallStack& stack) throw();
187 _NOINLINE_ void* operator new(size_t size) throw();
188 _NOINLINE_ void* operator new (size_t size, const std::nothrow_t& nothrow_constant,
189 const NativeCallStack& stack) throw();
190 _NOINLINE_ void* operator new (size_t size, const std::nothrow_t& nothrow_constant)
191 throw();
192 _NOINLINE_ void* operator new [](size_t size, const NativeCallStack& stack) throw();
193 _NOINLINE_ void* operator new [](size_t size) throw();
194 _NOINLINE_ void* operator new [](size_t size, const std::nothrow_t& nothrow_constant,
195 const NativeCallStack& stack) throw();
196 _NOINLINE_ void* operator new [](size_t size, const std::nothrow_t& nothrow_constant)
197 throw();
198 void operator delete(void* p);
199 void operator delete [] (void* p);
200 };
201
202 // Base class for objects allocated on the stack only.
203 // Calling new or delete will result in fatal error.
204
205 class StackObj ALLOCATION_SUPER_CLASS_SPEC {
206 private:
207 void* operator new(size_t size) throw();
208 void* operator new [](size_t size) throw();
209 #ifdef __IBMCPP__
210 public:
211 #endif
212 void operator delete(void* p);
213 void operator delete [](void* p);
214 };
215
216 // Base class for objects used as value objects.
217 // Calling new or delete will result in fatal error.
218 //
219 // Portability note: Certain compilers (e.g. gcc) will
220 // always make classes bigger if it has a superclass, even
221 // if the superclass does not have any virtual methods or
222 // instance fields. The HotSpot implementation relies on this
223 // not to happen. So never make a ValueObj class a direct subclass
224 // of this object, but use the VALUE_OBJ_CLASS_SPEC class instead, e.g.,
225 // like this:
226 //
227 // class A VALUE_OBJ_CLASS_SPEC {
228 // ...
229 // }
230 //
231 // With gcc and possible other compilers the VALUE_OBJ_CLASS_SPEC can
232 // be defined as a an empty string "".
233 //
234 class _ValueObj {
235 private:
236 void* operator new(size_t size) throw();
237 void operator delete(void* p);
238 void* operator new [](size_t size) throw();
239 void operator delete [](void* p);
240 };
241
242
243 // Base class for objects stored in Metaspace.
244 // Calling delete will result in fatal error.
245 //
246 // Do not inherit from something with a vptr because this class does
247 // not introduce one. This class is used to allocate both shared read-only
248 // and shared read-write classes.
249 //
250
251 class ClassLoaderData;
252
253 class MetaspaceObj {
254 public:
255 bool is_metaspace_object() const;
256 bool is_shared() const;
257 void print_address_on(outputStream* st) const; // nonvirtual address printing
258
259 #define METASPACE_OBJ_TYPES_DO(f) \
260 f(Unknown) \
261 f(Class) \
262 f(Symbol) \
263 f(TypeArrayU1) \
264 f(TypeArrayU2) \
265 f(TypeArrayU4) \
266 f(TypeArrayU8) \
267 f(TypeArrayOther) \
268 f(Method) \
269 f(ConstMethod) \
270 f(MethodData) \
271 f(ConstantPool) \
272 f(ConstantPoolCache) \
273 f(Annotation) \
274 f(MethodCounters) \
275 f(Deallocated)
276
277 #define METASPACE_OBJ_TYPE_DECLARE(name) name ## Type,
278 #define METASPACE_OBJ_TYPE_NAME_CASE(name) case name ## Type: return #name;
279
280 enum Type {
281 // Types are MetaspaceObj::ClassType, MetaspaceObj::SymbolType, etc
282 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_DECLARE)
283 _number_of_types
284 };
285
286 static const char * type_name(Type type) {
287 switch(type) {
288 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_NAME_CASE)
289 default:
290 ShouldNotReachHere();
291 return NULL;
292 }
293 }
294
295 static MetaspaceObj::Type array_type(size_t elem_size) {
296 switch (elem_size) {
297 case 1: return TypeArrayU1Type;
298 case 2: return TypeArrayU2Type;
299 case 4: return TypeArrayU4Type;
300 case 8: return TypeArrayU8Type;
301 default:
302 return TypeArrayOtherType;
303 }
304 }
305
306 void* operator new(size_t size, ClassLoaderData* loader_data,
307 size_t word_size, bool read_only,
308 Type type, Thread* thread) throw();
309 // can't use TRAPS from this header file.
310 void operator delete(void* p) { ShouldNotCallThis(); }
311 };
312
313 // Base class for classes that constitute name spaces.
314
315 class AllStatic {
316 public:
317 AllStatic() { ShouldNotCallThis(); }
318 ~AllStatic() { ShouldNotCallThis(); }
319 };
320
321
322 //------------------------------Chunk------------------------------------------
323 // Linked list of raw memory chunks
324 class Chunk: CHeapObj<mtChunk> {
325 friend class VMStructs;
326
327 protected:
328 Chunk* _next; // Next Chunk in list
329 const size_t _len; // Size of this Chunk
330 public:
331 void* operator new(size_t size, AllocFailType alloc_failmode, size_t length) throw();
332 void operator delete(void* p);
333 Chunk(size_t length);
334
335 enum {
336 // default sizes; make them slightly smaller than 2**k to guard against
337 // buddy-system style malloc implementations
338 #ifdef _LP64
339 slack = 40, // [RGV] Not sure if this is right, but make it
340 // a multiple of 8.
341 #else
342 slack = 20, // suspected sizeof(Chunk) + internal malloc headers
343 #endif
344
345 tiny_size = 256 - slack, // Size of first chunk (tiny)
346 init_size = 1*K - slack, // Size of first chunk (normal aka small)
347 medium_size= 10*K - slack, // Size of medium-sized chunk
348 size = 32*K - slack, // Default size of an Arena chunk (following the first)
349 non_pool_size = init_size + 32 // An initial size which is not one of above
350 };
351
352 void chop(); // Chop this chunk
353 void next_chop(); // Chop next chunk
354 static size_t aligned_overhead_size(void) { return ARENA_ALIGN(sizeof(Chunk)); }
355 static size_t aligned_overhead_size(size_t byte_size) { return ARENA_ALIGN(byte_size); }
356
357 size_t length() const { return _len; }
358 Chunk* next() const { return _next; }
359 void set_next(Chunk* n) { _next = n; }
360 // Boundaries of data area (possibly unused)
361 char* bottom() const { return ((char*) this) + aligned_overhead_size(); }
362 char* top() const { return bottom() + _len; }
363 bool contains(char* p) const { return bottom() <= p && p <= top(); }
364
365 // Start the chunk_pool cleaner task
366 static void start_chunk_pool_cleaner_task();
367
368 static void clean_chunk_pool();
369 };
370
371 //------------------------------Arena------------------------------------------
372 // Fast allocation of memory
373 class Arena : public CHeapObj<mtNone> {
374 protected:
375 friend class ResourceMark;
376 friend class HandleMark;
377 friend class NoHandleMark;
378 friend class VMStructs;
379
380 MEMFLAGS _flags; // Memory tracking flags
381
382 Chunk *_first; // First chunk
383 Chunk *_chunk; // current chunk
384 char *_hwm, *_max; // High water mark and max in current chunk
385 // Get a new Chunk of at least size x
386 void* grow(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
387 size_t _size_in_bytes; // Size of arena (used for native memory tracking)
388
389 NOT_PRODUCT(static julong _bytes_allocated;) // total #bytes allocated since start
390 friend class AllocStats;
391 debug_only(void* malloc(size_t size);)
392 debug_only(void* internal_malloc_4(size_t x);)
393 NOT_PRODUCT(void inc_bytes_allocated(size_t x);)
394
395 void signal_out_of_memory(size_t request, const char* whence) const;
396
397 bool check_for_overflow(size_t request, const char* whence,
398 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) const {
399 if (UINTPTR_MAX - request < (uintptr_t)_hwm) {
400 if (alloc_failmode == AllocFailStrategy::RETURN_NULL) {
401 return false;
402 }
403 signal_out_of_memory(request, whence);
404 }
405 return true;
406 }
407
408 public:
409 Arena(MEMFLAGS memflag);
410 Arena(MEMFLAGS memflag, size_t init_size);
411 ~Arena();
412 void destruct_contents();
413 char* hwm() const { return _hwm; }
414
415 // new operators
416 void* operator new (size_t size) throw();
417 void* operator new (size_t size, const std::nothrow_t& nothrow_constant) throw();
418
419 // dynamic memory type tagging
420 void* operator new(size_t size, MEMFLAGS flags) throw();
421 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags) throw();
422 void operator delete(void* p);
423
424 // Fast allocate in the arena. Common case is: pointer test + increment.
425 void* Amalloc(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) {
426 assert(is_power_of_2(ARENA_AMALLOC_ALIGNMENT) , "should be a power of 2");
427 x = ARENA_ALIGN(x);
428 debug_only(if (UseMallocOnly) return malloc(x);)
429 if (!check_for_overflow(x, "Arena::Amalloc", alloc_failmode))
430 return NULL;
431 NOT_PRODUCT(inc_bytes_allocated(x);)
432 if (_hwm + x > _max) {
433 return grow(x, alloc_failmode);
434 } else {
435 char *old = _hwm;
436 _hwm += x;
437 return old;
438 }
439 }
440 // Further assume size is padded out to words
441 void *Amalloc_4(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) {
442 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" );
443 debug_only(if (UseMallocOnly) return malloc(x);)
444 if (!check_for_overflow(x, "Arena::Amalloc_4", alloc_failmode))
445 return NULL;
446 NOT_PRODUCT(inc_bytes_allocated(x);)
447 if (_hwm + x > _max) {
448 return grow(x, alloc_failmode);
449 } else {
450 char *old = _hwm;
451 _hwm += x;
452 return old;
453 }
454 }
455
456 // Allocate with 'double' alignment. It is 8 bytes on sparc.
457 // In other cases Amalloc_D() should be the same as Amalloc_4().
458 void* Amalloc_D(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) {
459 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" );
460 debug_only(if (UseMallocOnly) return malloc(x);)
461 #if defined(SPARC) && !defined(_LP64)
462 #define DALIGN_M1 7
463 size_t delta = (((size_t)_hwm + DALIGN_M1) & ~DALIGN_M1) - (size_t)_hwm;
464 x += delta;
465 #endif
466 if (!check_for_overflow(x, "Arena::Amalloc_D", alloc_failmode))
467 return NULL;
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 private:
510 // Reset this Arena to empty, access will trigger grow if necessary
511 void reset(void) {
512 _first = _chunk = NULL;
513 _hwm = _max = NULL;
514 set_size_in_bytes(0);
515 }
516 };
517
518 // One of the following macros must be used when allocating
519 // an array or object from an arena
520 #define NEW_ARENA_ARRAY(arena, type, size) \
521 (type*) (arena)->Amalloc((size) * sizeof(type))
522
523 #define REALLOC_ARENA_ARRAY(arena, type, old, old_size, new_size) \
524 (type*) (arena)->Arealloc((char*)(old), (old_size) * sizeof(type), \
525 (new_size) * sizeof(type) )
526
527 #define FREE_ARENA_ARRAY(arena, type, old, size) \
528 (arena)->Afree((char*)(old), (size) * sizeof(type))
529
530 #define NEW_ARENA_OBJ(arena, type) \
531 NEW_ARENA_ARRAY(arena, type, 1)
532
533
534 //%note allocation_1
535 extern char* resource_allocate_bytes(size_t size,
536 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
537 extern char* resource_allocate_bytes(Thread* thread, size_t size,
538 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
539 extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size,
540 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM);
541 extern void resource_free_bytes( char *old, size_t size );
542
543 //----------------------------------------------------------------------
544 // Base class for objects allocated in the resource area per default.
545 // Optionally, objects may be allocated on the C heap with
546 // new(ResourceObj::C_HEAP) Foo(...) or in an Arena with new (&arena)
547 // ResourceObj's can be allocated within other objects, but don't use
548 // new or delete (allocation_type is unknown). If new is used to allocate,
549 // use delete to deallocate.
550 class ResourceObj ALLOCATION_SUPER_CLASS_SPEC {
551 public:
552 enum allocation_type { STACK_OR_EMBEDDED = 0, RESOURCE_AREA, C_HEAP, ARENA, allocation_mask = 0x3 };
553 static void set_allocation_type(address res, allocation_type type) NOT_DEBUG_RETURN;
554 #ifdef ASSERT
555 private:
556 // When this object is allocated on stack the new() operator is not
557 // called but garbage on stack may look like a valid allocation_type.
558 // Store negated 'this' pointer when new() is called to distinguish cases.
559 // Use second array's element for verification value to distinguish garbage.
560 uintptr_t _allocation_t[2];
561 bool is_type_set() const;
562 public:
563 allocation_type get_allocation_type() const;
564 bool allocated_on_stack() const { return get_allocation_type() == STACK_OR_EMBEDDED; }
565 bool allocated_on_res_area() const { return get_allocation_type() == RESOURCE_AREA; }
566 bool allocated_on_C_heap() const { return get_allocation_type() == C_HEAP; }
567 bool allocated_on_arena() const { return get_allocation_type() == ARENA; }
568 ResourceObj(); // default constructor
569 ResourceObj(const ResourceObj& r); // default copy constructor
570 ResourceObj& operator=(const ResourceObj& r); // default copy assignment
571 ~ResourceObj();
572 #endif // ASSERT
573
574 public:
575 void* operator new(size_t size, allocation_type type, MEMFLAGS flags) throw();
576 void* operator new [](size_t size, allocation_type type, MEMFLAGS flags) throw();
577 void* operator new(size_t size, const std::nothrow_t& nothrow_constant,
578 allocation_type type, MEMFLAGS flags) throw();
579 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant,
580 allocation_type type, MEMFLAGS flags) throw();
581
582 void* operator new(size_t size, Arena *arena) throw() {
583 address res = (address)arena->Amalloc(size);
584 DEBUG_ONLY(set_allocation_type(res, ARENA);)
585 return res;
586 }
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) throw() {
595 address res = (address)resource_allocate_bytes(size);
596 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);)
597 return res;
598 }
599
600 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() {
601 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL);
602 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);)
603 return res;
604 }
605
606 void* operator new [](size_t size) throw() {
607 address res = (address)resource_allocate_bytes(size);
608 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);)
609 return res;
610 }
611
612 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) throw() {
613 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL);
614 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);)
615 return res;
616 }
617
618 void operator delete(void* p);
619 void operator delete [](void* p);
620 };
621
622 // One of the following macros must be used when allocating an array
623 // or object to determine whether it should reside in the C heap on in
624 // the resource area.
625
626 #define NEW_RESOURCE_ARRAY(type, size)\
627 (type*) resource_allocate_bytes((size) * sizeof(type))
628
629 #define NEW_RESOURCE_ARRAY_RETURN_NULL(type, size)\
630 (type*) resource_allocate_bytes((size) * sizeof(type), AllocFailStrategy::RETURN_NULL)
631
632 #define NEW_RESOURCE_ARRAY_IN_THREAD(thread, type, size)\
633 (type*) resource_allocate_bytes(thread, (size) * sizeof(type))
634
635 #define NEW_RESOURCE_ARRAY_IN_THREAD_RETURN_NULL(thread, type, size)\
636 (type*) resource_allocate_bytes(thread, (size) * sizeof(type), AllocFailStrategy::RETURN_NULL)
637
638 #define REALLOC_RESOURCE_ARRAY(type, old, old_size, new_size)\
639 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type), (new_size) * sizeof(type))
640
641 #define REALLOC_RESOURCE_ARRAY_RETURN_NULL(type, old, old_size, new_size)\
642 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type),\
643 (new_size) * sizeof(type), AllocFailStrategy::RETURN_NULL)
644
645 #define FREE_RESOURCE_ARRAY(type, old, size)\
646 resource_free_bytes((char*)(old), (size) * sizeof(type))
647
648 #define FREE_FAST(old)\
649 /* nop */
650
651 #define NEW_RESOURCE_OBJ(type)\
652 NEW_RESOURCE_ARRAY(type, 1)
653
654 #define NEW_RESOURCE_OBJ_RETURN_NULL(type)\
655 NEW_RESOURCE_ARRAY_RETURN_NULL(type, 1)
656
657 #define NEW_C_HEAP_ARRAY3(type, size, memflags, pc, allocfail)\
658 (type*) AllocateHeap((size) * sizeof(type), memflags, pc, allocfail)
659
660 #define NEW_C_HEAP_ARRAY2(type, size, memflags, pc)\
661 (type*) (AllocateHeap((size) * sizeof(type), memflags, pc))
662
663 #define NEW_C_HEAP_ARRAY(type, size, memflags)\
664 (type*) (AllocateHeap((size) * sizeof(type), memflags))
665
666 #define NEW_C_HEAP_ARRAY2_RETURN_NULL(type, size, memflags, pc)\
667 NEW_C_HEAP_ARRAY3(type, (size), memflags, pc, AllocFailStrategy::RETURN_NULL)
668
669 #define NEW_C_HEAP_ARRAY_RETURN_NULL(type, size, memflags)\
670 NEW_C_HEAP_ARRAY3(type, (size), memflags, CURRENT_PC, AllocFailStrategy::RETURN_NULL)
671
672 #define REALLOC_C_HEAP_ARRAY(type, old, size, memflags)\
673 (type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags))
674
675 #define REALLOC_C_HEAP_ARRAY_RETURN_NULL(type, old, size, memflags)\
676 (type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags, AllocFailStrategy::RETURN_NULL))
677
678 #define FREE_C_HEAP_ARRAY(type, old) \
679 FreeHeap((char*)(old))
680
681 // allocate type in heap without calling ctor
682 #define NEW_C_HEAP_OBJ(type, memflags)\
683 NEW_C_HEAP_ARRAY(type, 1, memflags)
684
685 #define NEW_C_HEAP_OBJ_RETURN_NULL(type, memflags)\
686 NEW_C_HEAP_ARRAY_RETURN_NULL(type, 1, memflags)
687
688 // deallocate obj of type in heap without calling dtor
689 #define FREE_C_HEAP_OBJ(objname)\
690 FreeHeap((char*)objname);
691
692 // for statistics
693 #ifndef PRODUCT
694 class AllocStats : StackObj {
695 julong start_mallocs, start_frees;
696 julong start_malloc_bytes, start_mfree_bytes, start_res_bytes;
697 public:
698 AllocStats();
699
700 julong num_mallocs(); // since creation of receiver
701 julong alloc_bytes();
702 julong num_frees();
703 julong free_bytes();
704 julong resource_bytes();
705 void print();
706 };
707 #endif
708
709
710 //------------------------------ReallocMark---------------------------------
711 // Code which uses REALLOC_RESOURCE_ARRAY should check an associated
712 // ReallocMark, which is declared in the same scope as the reallocated
713 // pointer. Any operation that could __potentially__ cause a reallocation
714 // should check the ReallocMark.
715 class ReallocMark: public StackObj {
716 protected:
717 NOT_PRODUCT(int _nesting;)
718
719 public:
720 ReallocMark() PRODUCT_RETURN;
721 void check() PRODUCT_RETURN;
722 };
723
724 // Helper class to allocate arrays that may become large.
725 // Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit
726 // and uses mapped memory for larger allocations.
727 // Most OS mallocs do something similar but Solaris malloc does not revert
728 // to mapped memory for large allocations. By default ArrayAllocatorMallocLimit
729 // is set so that we always use malloc except for Solaris where we set the
730 // limit to get mapped memory.
731 template <class E, MEMFLAGS F>
732 class ArrayAllocator VALUE_OBJ_CLASS_SPEC {
733 char* _addr;
734 bool _use_malloc;
735 size_t _size;
736 bool _free_in_destructor;
737
738 static bool should_use_malloc(size_t size) {
739 return size < ArrayAllocatorMallocLimit;
740 }
741
742 static char* allocate_inner(size_t& size, bool& use_malloc);
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 E* reallocate(size_t new_length);
755 void free();
756 };
757
758 #endif // SHARE_VM_MEMORY_ALLOCATION_HPP