Mercurial > hg > truffle
annotate src/share/vm/memory/allocation.hpp @ 10334:7c5a1b62f53d
8014971: Minor code cleanup of the freelist management
Reviewed-by: jwilhelm, jmasa, tschatzl
author | brutisso |
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date | Wed, 22 May 2013 08:04:58 +0200 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 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" | |
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30 #include "utilities/macros.hpp" |
1972 | 31 #ifdef COMPILER1 |
32 #include "c1/c1_globals.hpp" | |
33 #endif | |
34 #ifdef COMPILER2 | |
35 #include "opto/c2_globals.hpp" | |
36 #endif | |
37 | |
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38 #include <new> |
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39 |
0 | 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 | |
6197 | 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 | |
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56 class AllocFailStrategy { |
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57 public: |
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58 enum AllocFailEnum { EXIT_OOM, RETURN_NULL }; |
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59 }; |
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60 typedef AllocFailStrategy::AllocFailEnum AllocFailType; |
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61 |
0 | 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 // | |
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80 // For classes in Metaspace (class data) |
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81 // - MetaspaceObj |
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82 // |
0 | 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 | |
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89 // directly in the resource area or in the C-heap, The _OBJ variants |
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90 // of the NEW/FREE_C_HEAP macros are used for alloc/dealloc simple |
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91 // objects which are not inherited from CHeapObj, note constructor and |
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92 // destructor are not called. The preferable way to allocate objects |
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93 // is using the new operator. |
0 | 94 // |
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95 // WARNING: The array variant must only be used for a homogenous array |
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96 // where all objects are of the exact type specified. If subtypes are |
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97 // stored in the array then must pay attention to calling destructors |
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98 // at needed. |
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99 // |
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100 // NEW_RESOURCE_ARRAY(type, size) |
0 | 101 // NEW_RESOURCE_OBJ(type) |
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102 // NEW_C_HEAP_ARRAY(type, size) |
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103 // NEW_C_HEAP_OBJ(type, memflags) |
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104 // FREE_C_HEAP_ARRAY(type, old, memflags) |
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105 // FREE_C_HEAP_OBJ(objname, type, memflags) |
0 | 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 | |
6197 | 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 | |
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158 mtClassShared = 0x0D00, // class data sharing |
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159 mtTest = 0x0E00, // Test type for verifying NMT |
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160 mt_number_of_types = 0x000E, // number of memory types (mtDontTrack |
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161 // is not included as validate type) |
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162 mtDontTrack = 0x0F00, // memory we do not or cannot track |
6197 | 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 | |
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181 #if INCLUDE_NMT |
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182 |
6197 | 183 extern bool NMT_track_callsite; |
184 | |
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185 #else |
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186 |
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187 const bool NMT_track_callsite = false; |
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188 |
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189 #endif // INCLUDE_NMT |
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190 |
6197 | 191 // debug build does not inline |
9152 | 192 #if defined(_NMT_NOINLINE_) |
6197 | 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 { | |
0 | 205 public: |
6197 | 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); | |
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209 _NOINLINE_ void* operator new [](size_t size, address caller_pc = 0); |
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210 _NOINLINE_ void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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211 address caller_pc = 0); |
0 | 212 void operator delete(void* p); |
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213 void operator delete [] (void* p); |
0 | 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 { | |
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220 private: |
0 | 221 void* operator new(size_t size); |
222 void operator delete(void* p); | |
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223 void* operator new [](size_t size); |
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224 void operator delete [](void* p); |
0 | 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 { | |
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246 private: |
0 | 247 void* operator new(size_t size); |
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248 void operator delete(void* p); |
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249 void* operator new [](size_t size); |
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250 void operator delete [](void* p); |
0 | 251 }; |
252 | |
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253 |
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254 // Base class for objects stored in Metaspace. |
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255 // Calling delete will result in fatal error. |
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256 // |
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257 // Do not inherit from something with a vptr because this class does |
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258 // not introduce one. This class is used to allocate both shared read-only |
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259 // and shared read-write classes. |
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260 // |
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261 |
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262 class ClassLoaderData; |
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263 |
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264 class MetaspaceObj { |
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265 public: |
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266 bool is_metadata() const; |
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267 bool is_metaspace_object() const; // more specific test but slower |
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268 bool is_shared() const; |
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269 void print_address_on(outputStream* st) const; // nonvirtual address printing |
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270 |
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271 void* operator new(size_t size, ClassLoaderData* loader_data, |
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272 size_t word_size, bool read_only, Thread* thread); |
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273 // can't use TRAPS from this header file. |
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274 void operator delete(void* p) { ShouldNotCallThis(); } |
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275 }; |
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276 |
0 | 277 // Base class for classes that constitute name spaces. |
278 | |
279 class AllStatic { | |
280 public: | |
281 AllStatic() { ShouldNotCallThis(); } | |
282 ~AllStatic() { ShouldNotCallThis(); } | |
283 }; | |
284 | |
285 | |
286 //------------------------------Chunk------------------------------------------ | |
287 // Linked list of raw memory chunks | |
6197 | 288 class Chunk: CHeapObj<mtChunk> { |
3939 | 289 friend class VMStructs; |
290 | |
0 | 291 protected: |
292 Chunk* _next; // Next Chunk in list | |
293 const size_t _len; // Size of this Chunk | |
294 public: | |
295 void* operator new(size_t size, size_t length); | |
296 void operator delete(void* p); | |
297 Chunk(size_t length); | |
298 | |
299 enum { | |
300 // default sizes; make them slightly smaller than 2**k to guard against | |
301 // buddy-system style malloc implementations | |
302 #ifdef _LP64 | |
303 slack = 40, // [RGV] Not sure if this is right, but make it | |
304 // a multiple of 8. | |
305 #else | |
306 slack = 20, // suspected sizeof(Chunk) + internal malloc headers | |
307 #endif | |
308 | |
309 init_size = 1*K - slack, // Size of first chunk | |
310 medium_size= 10*K - slack, // Size of medium-sized chunk | |
311 size = 32*K - slack, // Default size of an Arena chunk (following the first) | |
312 non_pool_size = init_size + 32 // An initial size which is not one of above | |
313 }; | |
314 | |
315 void chop(); // Chop this chunk | |
316 void next_chop(); // Chop next chunk | |
317 static size_t aligned_overhead_size(void) { return ARENA_ALIGN(sizeof(Chunk)); } | |
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318 static size_t aligned_overhead_size(size_t byte_size) { return ARENA_ALIGN(byte_size); } |
0 | 319 |
320 size_t length() const { return _len; } | |
321 Chunk* next() const { return _next; } | |
322 void set_next(Chunk* n) { _next = n; } | |
323 // Boundaries of data area (possibly unused) | |
324 char* bottom() const { return ((char*) this) + aligned_overhead_size(); } | |
325 char* top() const { return bottom() + _len; } | |
326 bool contains(char* p) const { return bottom() <= p && p <= top(); } | |
327 | |
328 // Start the chunk_pool cleaner task | |
329 static void start_chunk_pool_cleaner_task(); | |
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330 |
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331 static void clean_chunk_pool(); |
0 | 332 }; |
333 | |
334 //------------------------------Arena------------------------------------------ | |
335 // Fast allocation of memory | |
6197 | 336 class Arena : public CHeapObj<mtNone|otArena> { |
0 | 337 protected: |
338 friend class ResourceMark; | |
339 friend class HandleMark; | |
340 friend class NoHandleMark; | |
3939 | 341 friend class VMStructs; |
342 | |
0 | 343 Chunk *_first; // First chunk |
344 Chunk *_chunk; // current chunk | |
345 char *_hwm, *_max; // High water mark and max in current chunk | |
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346 // Get a new Chunk of at least size x |
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347 void* grow(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
6197 | 348 size_t _size_in_bytes; // Size of arena (used for native memory tracking) |
349 | |
2250 | 350 NOT_PRODUCT(static julong _bytes_allocated;) // total #bytes allocated since start |
0 | 351 friend class AllocStats; |
352 debug_only(void* malloc(size_t size);) | |
353 debug_only(void* internal_malloc_4(size_t x);) | |
2250 | 354 NOT_PRODUCT(void inc_bytes_allocated(size_t x);) |
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355 |
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356 void signal_out_of_memory(size_t request, const char* whence) const; |
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357 |
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358 void check_for_overflow(size_t request, const char* whence) const { |
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359 if (UINTPTR_MAX - request < (uintptr_t)_hwm) { |
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360 signal_out_of_memory(request, whence); |
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361 } |
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362 } |
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363 |
0 | 364 public: |
365 Arena(); | |
366 Arena(size_t init_size); | |
367 ~Arena(); | |
368 void destruct_contents(); | |
369 char* hwm() const { return _hwm; } | |
370 | |
6197 | 371 // new operators |
372 void* operator new (size_t size); | |
373 void* operator new (size_t size, const std::nothrow_t& nothrow_constant); | |
374 | |
375 // dynamic memory type tagging | |
376 void* operator new(size_t size, MEMFLAGS flags); | |
377 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags); | |
378 void operator delete(void* p); | |
379 | |
0 | 380 // Fast allocate in the arena. Common case is: pointer test + increment. |
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381 void* Amalloc(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
0 | 382 assert(is_power_of_2(ARENA_AMALLOC_ALIGNMENT) , "should be a power of 2"); |
383 x = ARENA_ALIGN(x); | |
384 debug_only(if (UseMallocOnly) return malloc(x);) | |
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385 check_for_overflow(x, "Arena::Amalloc"); |
2250 | 386 NOT_PRODUCT(inc_bytes_allocated(x);) |
0 | 387 if (_hwm + x > _max) { |
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388 return grow(x, alloc_failmode); |
0 | 389 } else { |
390 char *old = _hwm; | |
391 _hwm += x; | |
392 return old; | |
393 } | |
394 } | |
395 // Further assume size is padded out to words | |
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396 void *Amalloc_4(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
0 | 397 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); |
398 debug_only(if (UseMallocOnly) return malloc(x);) | |
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399 check_for_overflow(x, "Arena::Amalloc_4"); |
2250 | 400 NOT_PRODUCT(inc_bytes_allocated(x);) |
0 | 401 if (_hwm + x > _max) { |
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402 return grow(x, alloc_failmode); |
0 | 403 } else { |
404 char *old = _hwm; | |
405 _hwm += x; | |
406 return old; | |
407 } | |
408 } | |
409 | |
410 // Allocate with 'double' alignment. It is 8 bytes on sparc. | |
411 // In other cases Amalloc_D() should be the same as Amalloc_4(). | |
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412 void* Amalloc_D(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
0 | 413 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); |
414 debug_only(if (UseMallocOnly) return malloc(x);) | |
415 #if defined(SPARC) && !defined(_LP64) | |
416 #define DALIGN_M1 7 | |
417 size_t delta = (((size_t)_hwm + DALIGN_M1) & ~DALIGN_M1) - (size_t)_hwm; | |
418 x += delta; | |
419 #endif | |
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420 check_for_overflow(x, "Arena::Amalloc_D"); |
2250 | 421 NOT_PRODUCT(inc_bytes_allocated(x);) |
0 | 422 if (_hwm + x > _max) { |
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423 return grow(x, alloc_failmode); // grow() returns a result aligned >= 8 bytes. |
0 | 424 } else { |
425 char *old = _hwm; | |
426 _hwm += x; | |
427 #if defined(SPARC) && !defined(_LP64) | |
428 old += delta; // align to 8-bytes | |
429 #endif | |
430 return old; | |
431 } | |
432 } | |
433 | |
434 // Fast delete in area. Common case is: NOP (except for storage reclaimed) | |
435 void Afree(void *ptr, size_t size) { | |
436 #ifdef ASSERT | |
437 if (ZapResourceArea) memset(ptr, badResourceValue, size); // zap freed memory | |
438 if (UseMallocOnly) return; | |
439 #endif | |
440 if (((char*)ptr) + size == _hwm) _hwm = (char*)ptr; | |
441 } | |
442 | |
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443 void *Arealloc( void *old_ptr, size_t old_size, size_t new_size, |
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444 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
0 | 445 |
446 // Move contents of this arena into an empty arena | |
447 Arena *move_contents(Arena *empty_arena); | |
448 | |
449 // Determine if pointer belongs to this Arena or not. | |
450 bool contains( const void *ptr ) const; | |
451 | |
452 // Total of all chunks in use (not thread-safe) | |
453 size_t used() const; | |
454 | |
455 // Total # of bytes used | |
6197 | 456 size_t size_in_bytes() const { return _size_in_bytes; }; |
457 void set_size_in_bytes(size_t size); | |
458 | |
0 | 459 static void free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) PRODUCT_RETURN; |
460 static void free_all(char** start, char** end) PRODUCT_RETURN; | |
461 | |
6197 | 462 // how many arena instances |
463 NOT_PRODUCT(static volatile jint _instance_count;) | |
0 | 464 private: |
465 // Reset this Arena to empty, access will trigger grow if necessary | |
466 void reset(void) { | |
467 _first = _chunk = NULL; | |
468 _hwm = _max = NULL; | |
6197 | 469 set_size_in_bytes(0); |
0 | 470 } |
471 }; | |
472 | |
473 // One of the following macros must be used when allocating | |
474 // an array or object from an arena | |
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475 #define NEW_ARENA_ARRAY(arena, type, size) \ |
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476 (type*) (arena)->Amalloc((size) * sizeof(type)) |
0 | 477 |
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478 #define REALLOC_ARENA_ARRAY(arena, type, old, old_size, new_size) \ |
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479 (type*) (arena)->Arealloc((char*)(old), (old_size) * sizeof(type), \ |
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480 (new_size) * sizeof(type) ) |
0 | 481 |
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482 #define FREE_ARENA_ARRAY(arena, type, old, size) \ |
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483 (arena)->Afree((char*)(old), (size) * sizeof(type)) |
0 | 484 |
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485 #define NEW_ARENA_OBJ(arena, type) \ |
0 | 486 NEW_ARENA_ARRAY(arena, type, 1) |
487 | |
488 | |
489 //%note allocation_1 | |
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490 extern char* resource_allocate_bytes(size_t size, |
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491 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
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492 extern char* resource_allocate_bytes(Thread* thread, size_t size, |
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493 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
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494 extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size, |
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495 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
0 | 496 extern void resource_free_bytes( char *old, size_t size ); |
497 | |
498 //---------------------------------------------------------------------- | |
499 // Base class for objects allocated in the resource area per default. | |
500 // Optionally, objects may be allocated on the C heap with | |
501 // new(ResourceObj::C_HEAP) Foo(...) or in an Arena with new (&arena) | |
502 // ResourceObj's can be allocated within other objects, but don't use | |
503 // new or delete (allocation_type is unknown). If new is used to allocate, | |
504 // use delete to deallocate. | |
505 class ResourceObj ALLOCATION_SUPER_CLASS_SPEC { | |
506 public: | |
1685 | 507 enum allocation_type { STACK_OR_EMBEDDED = 0, RESOURCE_AREA, C_HEAP, ARENA, allocation_mask = 0x3 }; |
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508 static void set_allocation_type(address res, allocation_type type) NOT_DEBUG_RETURN; |
0 | 509 #ifdef ASSERT |
510 private: | |
1685 | 511 // When this object is allocated on stack the new() operator is not |
512 // called but garbage on stack may look like a valid allocation_type. | |
513 // Store negated 'this' pointer when new() is called to distinguish cases. | |
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514 // Use second array's element for verification value to distinguish garbage. |
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515 uintptr_t _allocation_t[2]; |
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516 bool is_type_set() const; |
0 | 517 public: |
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518 allocation_type get_allocation_type() const; |
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519 bool allocated_on_stack() const { return get_allocation_type() == STACK_OR_EMBEDDED; } |
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520 bool allocated_on_res_area() const { return get_allocation_type() == RESOURCE_AREA; } |
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521 bool allocated_on_C_heap() const { return get_allocation_type() == C_HEAP; } |
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522 bool allocated_on_arena() const { return get_allocation_type() == ARENA; } |
1685 | 523 ResourceObj(); // default construtor |
524 ResourceObj(const ResourceObj& r); // default copy construtor | |
525 ResourceObj& operator=(const ResourceObj& r); // default copy assignment | |
526 ~ResourceObj(); | |
0 | 527 #endif // ASSERT |
528 | |
529 public: | |
6197 | 530 void* operator new(size_t size, allocation_type type, MEMFLAGS flags); |
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531 void* operator new [](size_t size, allocation_type type, MEMFLAGS flags); |
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532 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, |
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533 allocation_type type, MEMFLAGS flags); |
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534 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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535 allocation_type type, MEMFLAGS flags); |
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536 |
0 | 537 void* operator new(size_t size, Arena *arena) { |
538 address res = (address)arena->Amalloc(size); | |
1685 | 539 DEBUG_ONLY(set_allocation_type(res, ARENA);) |
0 | 540 return res; |
541 } | |
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542 |
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543 void* operator new [](size_t size, Arena *arena) { |
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544 address res = (address)arena->Amalloc(size); |
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545 DEBUG_ONLY(set_allocation_type(res, ARENA);) |
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546 return res; |
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547 } |
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548 |
0 | 549 void* operator new(size_t size) { |
550 address res = (address)resource_allocate_bytes(size); | |
1685 | 551 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) |
0 | 552 return res; |
553 } | |
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554 |
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555 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) { |
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556 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); |
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557 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) |
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558 return res; |
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559 } |
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560 |
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561 void* operator new [](size_t size) { |
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562 address res = (address)resource_allocate_bytes(size); |
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563 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) |
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564 return res; |
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565 } |
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566 |
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567 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) { |
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568 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); |
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569 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) |
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570 return res; |
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571 } |
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572 |
0 | 573 void operator delete(void* p); |
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574 void operator delete [](void* p); |
0 | 575 }; |
576 | |
577 // One of the following macros must be used when allocating an array | |
578 // or object to determine whether it should reside in the C heap on in | |
579 // the resource area. | |
580 | |
581 #define NEW_RESOURCE_ARRAY(type, size)\ | |
582 (type*) resource_allocate_bytes((size) * sizeof(type)) | |
583 | |
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584 #define NEW_RESOURCE_ARRAY_RETURN_NULL(type, size)\ |
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585 (type*) resource_allocate_bytes((size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
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586 |
0 | 587 #define NEW_RESOURCE_ARRAY_IN_THREAD(thread, type, size)\ |
588 (type*) resource_allocate_bytes(thread, (size) * sizeof(type)) | |
589 | |
590 #define REALLOC_RESOURCE_ARRAY(type, old, old_size, new_size)\ | |
591 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type), (new_size) * sizeof(type) ) | |
592 | |
593 #define FREE_RESOURCE_ARRAY(type, old, size)\ | |
594 resource_free_bytes((char*)(old), (size) * sizeof(type)) | |
595 | |
596 #define FREE_FAST(old)\ | |
597 /* nop */ | |
598 | |
599 #define NEW_RESOURCE_OBJ(type)\ | |
600 NEW_RESOURCE_ARRAY(type, 1) | |
601 | |
6197 | 602 #define NEW_C_HEAP_ARRAY(type, size, memflags)\ |
603 (type*) (AllocateHeap((size) * sizeof(type), memflags)) | |
0 | 604 |
6197 | 605 #define REALLOC_C_HEAP_ARRAY(type, old, size, memflags)\ |
606 (type*) (ReallocateHeap((char*)old, (size) * sizeof(type), memflags)) | |
607 | |
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608 #define FREE_C_HEAP_ARRAY(type, old, memflags) \ |
6197 | 609 FreeHeap((char*)(old), memflags) |
0 | 610 |
6197 | 611 #define NEW_C_HEAP_ARRAY2(type, size, memflags, pc)\ |
612 (type*) (AllocateHeap((size) * sizeof(type), memflags, pc)) | |
0 | 613 |
6197 | 614 #define REALLOC_C_HEAP_ARRAY2(type, old, size, memflags, pc)\ |
615 (type*) (ReallocateHeap((char*)old, (size) * sizeof(type), memflags, pc)) | |
616 | |
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617 #define NEW_C_HEAP_ARRAY3(type, size, memflags, pc, allocfail) \ |
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618 (type*) AllocateHeap(size * sizeof(type), memflags, pc, allocfail) |
6197 | 619 |
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620 // allocate type in heap without calling ctor |
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621 #define NEW_C_HEAP_OBJ(type, memflags)\ |
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622 NEW_C_HEAP_ARRAY(type, 1, memflags) |
0 | 623 |
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624 // deallocate obj of type in heap without calling dtor |
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625 #define FREE_C_HEAP_OBJ(objname, memflags)\ |
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626 FreeHeap((char*)objname, memflags); |
0 | 627 |
628 // for statistics | |
629 #ifndef PRODUCT | |
630 class AllocStats : StackObj { | |
2250 | 631 julong start_mallocs, start_frees; |
632 julong start_malloc_bytes, start_mfree_bytes, start_res_bytes; | |
0 | 633 public: |
634 AllocStats(); | |
635 | |
2250 | 636 julong num_mallocs(); // since creation of receiver |
637 julong alloc_bytes(); | |
638 julong num_frees(); | |
639 julong free_bytes(); | |
640 julong resource_bytes(); | |
0 | 641 void print(); |
642 }; | |
643 #endif | |
644 | |
645 | |
646 //------------------------------ReallocMark--------------------------------- | |
647 // Code which uses REALLOC_RESOURCE_ARRAY should check an associated | |
648 // ReallocMark, which is declared in the same scope as the reallocated | |
649 // pointer. Any operation that could __potentially__ cause a reallocation | |
650 // should check the ReallocMark. | |
651 class ReallocMark: public StackObj { | |
652 protected: | |
653 NOT_PRODUCT(int _nesting;) | |
654 | |
655 public: | |
656 ReallocMark() PRODUCT_RETURN; | |
657 void check() PRODUCT_RETURN; | |
658 }; | |
1972 | 659 |
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660 // Helper class to allocate arrays that may become large. |
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661 // Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit |
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662 // and uses mapped memory for larger allocations. |
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663 // Most OS mallocs do something similar but Solaris malloc does not revert |
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664 // to mapped memory for large allocations. By default ArrayAllocatorMallocLimit |
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665 // is set so that we always use malloc except for Solaris where we set the |
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666 // limit to get mapped memory. |
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667 template <class E, MEMFLAGS F> |
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668 class ArrayAllocator : StackObj { |
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669 char* _addr; |
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670 bool _use_malloc; |
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671 size_t _size; |
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672 public: |
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673 ArrayAllocator() : _addr(NULL), _use_malloc(false), _size(0) { } |
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674 ~ArrayAllocator() { free(); } |
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675 E* allocate(size_t length); |
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676 void free(); |
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677 }; |
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678 |
1972 | 679 #endif // SHARE_VM_MEMORY_ALLOCATION_HPP |