Mercurial > hg > truffle
annotate src/share/vm/memory/allocation.hpp @ 21244:bf5e055dbc9c
SSAUtils: minor refactoring.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Thu, 30 Apr 2015 15:36:03 +0200 |
parents | 7848fc12602b |
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rev | line source |
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0 | 1 /* |
20360 | 2 * Copyright (c) 1997, 2014, 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 /* | |
20360 | 136 * Memory types |
6197 | 137 */ |
138 enum MemoryType { | |
139 // Memory type by sub systems. It occupies lower byte. | |
20360 | 140 mtJavaHeap = 0x00, // Java heap |
141 mtClass = 0x01, // memory class for Java classes | |
142 mtThread = 0x02, // memory for thread objects | |
143 mtThreadStack = 0x03, | |
144 mtCode = 0x04, // memory for generated code | |
145 mtGC = 0x05, // memory for GC | |
146 mtCompiler = 0x06, // memory for compiler | |
147 mtInternal = 0x07, // memory used by VM, but does not belong to | |
6197 | 148 // any of above categories, and not used for |
149 // native memory tracking | |
20360 | 150 mtOther = 0x08, // memory not used by VM |
151 mtSymbol = 0x09, // symbol | |
152 mtNMT = 0x0A, // memory used by native memory tracking | |
153 mtClassShared = 0x0B, // class data sharing | |
154 mtChunk = 0x0C, // chunk that holds content of arenas | |
155 mtTest = 0x0D, // Test type for verifying NMT | |
156 mtTracing = 0x0E, // memory used for Tracing | |
157 mtNone = 0x0F, // undefined | |
158 mt_number_of_types = 0x10 // number of memory types (mtDontTrack | |
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159 // is not included as validate type) |
6197 | 160 }; |
161 | |
20360 | 162 typedef MemoryType MEMFLAGS; |
6197 | 163 |
164 | |
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165 #if INCLUDE_NMT |
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166 |
6197 | 167 extern bool NMT_track_callsite; |
168 | |
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169 #else |
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170 |
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171 const bool NMT_track_callsite = false; |
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172 |
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173 #endif // INCLUDE_NMT |
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174 |
20360 | 175 class NativeCallStack; |
6197 | 176 |
177 | |
178 template <MEMFLAGS F> class CHeapObj ALLOCATION_SUPER_CLASS_SPEC { | |
0 | 179 public: |
20360 | 180 _NOINLINE_ void* operator new(size_t size, const NativeCallStack& stack) throw(); |
181 _NOINLINE_ void* operator new(size_t size) throw(); | |
6197 | 182 _NOINLINE_ void* operator new (size_t size, const std::nothrow_t& nothrow_constant, |
20360 | 183 const NativeCallStack& stack) throw(); |
184 _NOINLINE_ void* operator new (size_t size, const std::nothrow_t& nothrow_constant) | |
185 throw(); | |
186 _NOINLINE_ void* operator new [](size_t size, const NativeCallStack& stack) throw(); | |
187 _NOINLINE_ void* operator new [](size_t size) throw(); | |
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188 _NOINLINE_ void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
20360 | 189 const NativeCallStack& stack) throw(); |
190 _NOINLINE_ void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) | |
191 throw(); | |
0 | 192 void operator delete(void* p); |
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193 void operator delete [] (void* p); |
0 | 194 }; |
195 | |
196 // Base class for objects allocated on the stack only. | |
197 // Calling new or delete will result in fatal error. | |
198 | |
199 class StackObj ALLOCATION_SUPER_CLASS_SPEC { | |
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200 private: |
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201 void* operator new(size_t size) throw(); |
14422 | 202 void* operator new [](size_t size) throw(); |
14411 | 203 #ifdef __IBMCPP__ |
204 public: | |
205 #endif | |
0 | 206 void operator delete(void* p); |
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207 void operator delete [](void* p); |
0 | 208 }; |
209 | |
210 // Base class for objects used as value objects. | |
211 // Calling new or delete will result in fatal error. | |
212 // | |
213 // Portability note: Certain compilers (e.g. gcc) will | |
214 // always make classes bigger if it has a superclass, even | |
215 // if the superclass does not have any virtual methods or | |
216 // instance fields. The HotSpot implementation relies on this | |
217 // not to happen. So never make a ValueObj class a direct subclass | |
218 // of this object, but use the VALUE_OBJ_CLASS_SPEC class instead, e.g., | |
219 // like this: | |
220 // | |
221 // class A VALUE_OBJ_CLASS_SPEC { | |
222 // ... | |
223 // } | |
224 // | |
225 // With gcc and possible other compilers the VALUE_OBJ_CLASS_SPEC can | |
226 // be defined as a an empty string "". | |
227 // | |
228 class _ValueObj { | |
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229 private: |
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230 void* operator new(size_t size) throw(); |
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231 void operator delete(void* p); |
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232 void* operator new [](size_t size) throw(); |
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233 void operator delete [](void* p); |
0 | 234 }; |
235 | |
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236 |
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237 // Base class for objects stored in Metaspace. |
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238 // Calling delete will result in fatal error. |
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239 // |
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240 // Do not inherit from something with a vptr because this class does |
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241 // not introduce one. This class is used to allocate both shared read-only |
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242 // and shared read-write classes. |
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243 // |
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244 |
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245 class ClassLoaderData; |
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246 |
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247 class MetaspaceObj { |
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248 public: |
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249 bool is_metaspace_object() const; |
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250 bool is_shared() const; |
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251 void print_address_on(outputStream* st) const; // nonvirtual address printing |
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252 |
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253 #define METASPACE_OBJ_TYPES_DO(f) \ |
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254 f(Unknown) \ |
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255 f(Class) \ |
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256 f(Symbol) \ |
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257 f(TypeArrayU1) \ |
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258 f(TypeArrayU2) \ |
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259 f(TypeArrayU4) \ |
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260 f(TypeArrayU8) \ |
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261 f(TypeArrayOther) \ |
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262 f(Method) \ |
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263 f(ConstMethod) \ |
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264 f(MethodData) \ |
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265 f(ConstantPool) \ |
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266 f(ConstantPoolCache) \ |
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267 f(Annotation) \ |
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268 f(MethodCounters) \ |
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269 f(Deallocated) |
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270 |
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271 #define METASPACE_OBJ_TYPE_DECLARE(name) name ## Type, |
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272 #define METASPACE_OBJ_TYPE_NAME_CASE(name) case name ## Type: return #name; |
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273 |
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274 enum Type { |
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275 // Types are MetaspaceObj::ClassType, MetaspaceObj::SymbolType, etc |
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276 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_DECLARE) |
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277 _number_of_types |
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278 }; |
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279 |
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280 static const char * type_name(Type type) { |
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281 switch(type) { |
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282 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_NAME_CASE) |
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283 default: |
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284 ShouldNotReachHere(); |
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285 return NULL; |
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286 } |
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287 } |
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288 |
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289 static MetaspaceObj::Type array_type(size_t elem_size) { |
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290 switch (elem_size) { |
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291 case 1: return TypeArrayU1Type; |
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292 case 2: return TypeArrayU2Type; |
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293 case 4: return TypeArrayU4Type; |
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294 case 8: return TypeArrayU8Type; |
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295 default: |
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296 return TypeArrayOtherType; |
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297 } |
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298 } |
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299 |
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300 void* operator new(size_t size, ClassLoaderData* loader_data, |
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301 size_t word_size, bool read_only, |
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302 Type type, Thread* thread) throw(); |
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303 // can't use TRAPS from this header file. |
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304 void operator delete(void* p) { ShouldNotCallThis(); } |
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305 }; |
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306 |
0 | 307 // Base class for classes that constitute name spaces. |
308 | |
309 class AllStatic { | |
310 public: | |
311 AllStatic() { ShouldNotCallThis(); } | |
312 ~AllStatic() { ShouldNotCallThis(); } | |
313 }; | |
314 | |
315 | |
316 //------------------------------Chunk------------------------------------------ | |
317 // Linked list of raw memory chunks | |
6197 | 318 class Chunk: CHeapObj<mtChunk> { |
3939 | 319 friend class VMStructs; |
320 | |
0 | 321 protected: |
322 Chunk* _next; // Next Chunk in list | |
323 const size_t _len; // Size of this Chunk | |
324 public: | |
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325 void* operator new(size_t size, AllocFailType alloc_failmode, size_t length) throw(); |
0 | 326 void operator delete(void* p); |
327 Chunk(size_t length); | |
328 | |
329 enum { | |
330 // default sizes; make them slightly smaller than 2**k to guard against | |
331 // buddy-system style malloc implementations | |
332 #ifdef _LP64 | |
333 slack = 40, // [RGV] Not sure if this is right, but make it | |
334 // a multiple of 8. | |
335 #else | |
336 slack = 20, // suspected sizeof(Chunk) + internal malloc headers | |
337 #endif | |
338 | |
11095 | 339 tiny_size = 256 - slack, // Size of first chunk (tiny) |
340 init_size = 1*K - slack, // Size of first chunk (normal aka small) | |
0 | 341 medium_size= 10*K - slack, // Size of medium-sized chunk |
342 size = 32*K - slack, // Default size of an Arena chunk (following the first) | |
343 non_pool_size = init_size + 32 // An initial size which is not one of above | |
344 }; | |
345 | |
346 void chop(); // Chop this chunk | |
347 void next_chop(); // Chop next chunk | |
348 static size_t aligned_overhead_size(void) { return ARENA_ALIGN(sizeof(Chunk)); } | |
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349 static size_t aligned_overhead_size(size_t byte_size) { return ARENA_ALIGN(byte_size); } |
0 | 350 |
351 size_t length() const { return _len; } | |
352 Chunk* next() const { return _next; } | |
353 void set_next(Chunk* n) { _next = n; } | |
354 // Boundaries of data area (possibly unused) | |
355 char* bottom() const { return ((char*) this) + aligned_overhead_size(); } | |
356 char* top() const { return bottom() + _len; } | |
357 bool contains(char* p) const { return bottom() <= p && p <= top(); } | |
358 | |
359 // Start the chunk_pool cleaner task | |
360 static void start_chunk_pool_cleaner_task(); | |
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361 |
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362 static void clean_chunk_pool(); |
0 | 363 }; |
364 | |
365 //------------------------------Arena------------------------------------------ | |
366 // Fast allocation of memory | |
20360 | 367 class Arena : public CHeapObj<mtNone> { |
0 | 368 protected: |
369 friend class ResourceMark; | |
370 friend class HandleMark; | |
371 friend class NoHandleMark; | |
3939 | 372 friend class VMStructs; |
373 | |
20360 | 374 MEMFLAGS _flags; // Memory tracking flags |
375 | |
0 | 376 Chunk *_first; // First chunk |
377 Chunk *_chunk; // current chunk | |
378 char *_hwm, *_max; // High water mark and max in current chunk | |
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379 // Get a new Chunk of at least size x |
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380 void* grow(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
6197 | 381 size_t _size_in_bytes; // Size of arena (used for native memory tracking) |
382 | |
2250 | 383 NOT_PRODUCT(static julong _bytes_allocated;) // total #bytes allocated since start |
0 | 384 friend class AllocStats; |
385 debug_only(void* malloc(size_t size);) | |
386 debug_only(void* internal_malloc_4(size_t x);) | |
2250 | 387 NOT_PRODUCT(void inc_bytes_allocated(size_t x);) |
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388 |
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389 void signal_out_of_memory(size_t request, const char* whence) const; |
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390 |
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391 bool check_for_overflow(size_t request, const char* whence, |
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392 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) const { |
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393 if (UINTPTR_MAX - request < (uintptr_t)_hwm) { |
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394 if (alloc_failmode == AllocFailStrategy::RETURN_NULL) { |
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395 return false; |
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396 } |
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397 signal_out_of_memory(request, whence); |
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398 } |
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399 return true; |
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400 } |
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401 |
0 | 402 public: |
20360 | 403 Arena(MEMFLAGS memflag); |
404 Arena(MEMFLAGS memflag, size_t init_size); | |
0 | 405 ~Arena(); |
406 void destruct_contents(); | |
407 char* hwm() const { return _hwm; } | |
408 | |
6197 | 409 // new operators |
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410 void* operator new (size_t size) throw(); |
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411 void* operator new (size_t size, const std::nothrow_t& nothrow_constant) throw(); |
6197 | 412 |
413 // dynamic memory type tagging | |
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414 void* operator new(size_t size, MEMFLAGS flags) throw(); |
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415 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags) throw(); |
6197 | 416 void operator delete(void* p); |
417 | |
0 | 418 // Fast allocate in the arena. Common case is: pointer test + increment. |
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419 void* Amalloc(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
0 | 420 assert(is_power_of_2(ARENA_AMALLOC_ALIGNMENT) , "should be a power of 2"); |
421 x = ARENA_ALIGN(x); | |
422 debug_only(if (UseMallocOnly) return malloc(x);) | |
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423 if (!check_for_overflow(x, "Arena::Amalloc", alloc_failmode)) |
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424 return NULL; |
2250 | 425 NOT_PRODUCT(inc_bytes_allocated(x);) |
0 | 426 if (_hwm + x > _max) { |
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427 return grow(x, alloc_failmode); |
0 | 428 } else { |
429 char *old = _hwm; | |
430 _hwm += x; | |
431 return old; | |
432 } | |
433 } | |
434 // Further assume size is padded out to words | |
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435 void *Amalloc_4(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
0 | 436 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); |
437 debug_only(if (UseMallocOnly) return malloc(x);) | |
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438 if (!check_for_overflow(x, "Arena::Amalloc_4", alloc_failmode)) |
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439 return NULL; |
2250 | 440 NOT_PRODUCT(inc_bytes_allocated(x);) |
0 | 441 if (_hwm + x > _max) { |
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442 return grow(x, alloc_failmode); |
0 | 443 } else { |
444 char *old = _hwm; | |
445 _hwm += x; | |
446 return old; | |
447 } | |
448 } | |
449 | |
450 // Allocate with 'double' alignment. It is 8 bytes on sparc. | |
451 // In other cases Amalloc_D() should be the same as Amalloc_4(). | |
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452 void* Amalloc_D(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
0 | 453 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); |
454 debug_only(if (UseMallocOnly) return malloc(x);) | |
455 #if defined(SPARC) && !defined(_LP64) | |
456 #define DALIGN_M1 7 | |
457 size_t delta = (((size_t)_hwm + DALIGN_M1) & ~DALIGN_M1) - (size_t)_hwm; | |
458 x += delta; | |
459 #endif | |
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460 if (!check_for_overflow(x, "Arena::Amalloc_D", alloc_failmode)) |
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461 return NULL; |
2250 | 462 NOT_PRODUCT(inc_bytes_allocated(x);) |
0 | 463 if (_hwm + x > _max) { |
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464 return grow(x, alloc_failmode); // grow() returns a result aligned >= 8 bytes. |
0 | 465 } else { |
466 char *old = _hwm; | |
467 _hwm += x; | |
468 #if defined(SPARC) && !defined(_LP64) | |
469 old += delta; // align to 8-bytes | |
470 #endif | |
471 return old; | |
472 } | |
473 } | |
474 | |
475 // Fast delete in area. Common case is: NOP (except for storage reclaimed) | |
476 void Afree(void *ptr, size_t size) { | |
477 #ifdef ASSERT | |
478 if (ZapResourceArea) memset(ptr, badResourceValue, size); // zap freed memory | |
479 if (UseMallocOnly) return; | |
480 #endif | |
481 if (((char*)ptr) + size == _hwm) _hwm = (char*)ptr; | |
482 } | |
483 | |
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484 void *Arealloc( void *old_ptr, size_t old_size, size_t new_size, |
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485 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
0 | 486 |
487 // Move contents of this arena into an empty arena | |
488 Arena *move_contents(Arena *empty_arena); | |
489 | |
490 // Determine if pointer belongs to this Arena or not. | |
491 bool contains( const void *ptr ) const; | |
492 | |
493 // Total of all chunks in use (not thread-safe) | |
494 size_t used() const; | |
495 | |
496 // Total # of bytes used | |
6197 | 497 size_t size_in_bytes() const { return _size_in_bytes; }; |
498 void set_size_in_bytes(size_t size); | |
499 | |
0 | 500 static void free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) PRODUCT_RETURN; |
501 static void free_all(char** start, char** end) PRODUCT_RETURN; | |
502 | |
503 private: | |
504 // Reset this Arena to empty, access will trigger grow if necessary | |
505 void reset(void) { | |
506 _first = _chunk = NULL; | |
507 _hwm = _max = NULL; | |
6197 | 508 set_size_in_bytes(0); |
0 | 509 } |
510 }; | |
511 | |
512 // One of the following macros must be used when allocating | |
513 // an array or object from an arena | |
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514 #define NEW_ARENA_ARRAY(arena, type, size) \ |
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515 (type*) (arena)->Amalloc((size) * sizeof(type)) |
0 | 516 |
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517 #define REALLOC_ARENA_ARRAY(arena, type, old, old_size, new_size) \ |
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518 (type*) (arena)->Arealloc((char*)(old), (old_size) * sizeof(type), \ |
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519 (new_size) * sizeof(type) ) |
0 | 520 |
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521 #define FREE_ARENA_ARRAY(arena, type, old, size) \ |
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522 (arena)->Afree((char*)(old), (size) * sizeof(type)) |
0 | 523 |
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524 #define NEW_ARENA_OBJ(arena, type) \ |
0 | 525 NEW_ARENA_ARRAY(arena, type, 1) |
526 | |
527 | |
528 //%note allocation_1 | |
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529 extern char* resource_allocate_bytes(size_t size, |
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530 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
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531 extern char* resource_allocate_bytes(Thread* thread, size_t size, |
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532 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
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533 extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size, |
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534 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
0 | 535 extern void resource_free_bytes( char *old, size_t size ); |
536 | |
537 //---------------------------------------------------------------------- | |
538 // Base class for objects allocated in the resource area per default. | |
539 // Optionally, objects may be allocated on the C heap with | |
540 // new(ResourceObj::C_HEAP) Foo(...) or in an Arena with new (&arena) | |
541 // ResourceObj's can be allocated within other objects, but don't use | |
542 // new or delete (allocation_type is unknown). If new is used to allocate, | |
543 // use delete to deallocate. | |
544 class ResourceObj ALLOCATION_SUPER_CLASS_SPEC { | |
545 public: | |
1685 | 546 enum allocation_type { STACK_OR_EMBEDDED = 0, RESOURCE_AREA, C_HEAP, ARENA, allocation_mask = 0x3 }; |
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547 static void set_allocation_type(address res, allocation_type type) NOT_DEBUG_RETURN; |
0 | 548 #ifdef ASSERT |
549 private: | |
1685 | 550 // When this object is allocated on stack the new() operator is not |
551 // called but garbage on stack may look like a valid allocation_type. | |
552 // Store negated 'this' pointer when new() is called to distinguish cases. | |
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553 // Use second array's element for verification value to distinguish garbage. |
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554 uintptr_t _allocation_t[2]; |
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555 bool is_type_set() const; |
0 | 556 public: |
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557 allocation_type get_allocation_type() const; |
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558 bool allocated_on_stack() const { return get_allocation_type() == STACK_OR_EMBEDDED; } |
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559 bool allocated_on_res_area() const { return get_allocation_type() == RESOURCE_AREA; } |
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560 bool allocated_on_C_heap() const { return get_allocation_type() == C_HEAP; } |
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561 bool allocated_on_arena() const { return get_allocation_type() == ARENA; } |
1685 | 562 ResourceObj(); // default construtor |
563 ResourceObj(const ResourceObj& r); // default copy construtor | |
564 ResourceObj& operator=(const ResourceObj& r); // default copy assignment | |
565 ~ResourceObj(); | |
0 | 566 #endif // ASSERT |
567 | |
568 public: | |
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569 void* operator new(size_t size, allocation_type type, MEMFLAGS flags) throw(); |
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570 void* operator new [](size_t size, allocation_type type, MEMFLAGS flags) throw(); |
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571 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, |
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572 allocation_type type, MEMFLAGS flags) throw(); |
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573 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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574 allocation_type type, MEMFLAGS flags) throw(); |
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575 |
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576 void* operator new(size_t size, Arena *arena) throw() { |
0 | 577 address res = (address)arena->Amalloc(size); |
1685 | 578 DEBUG_ONLY(set_allocation_type(res, ARENA);) |
0 | 579 return res; |
580 } | |
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581 |
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582 void* operator new [](size_t size, Arena *arena) throw() { |
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583 address res = (address)arena->Amalloc(size); |
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584 DEBUG_ONLY(set_allocation_type(res, ARENA);) |
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585 return res; |
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586 } |
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587 |
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588 void* operator new(size_t size) throw() { |
0 | 589 address res = (address)resource_allocate_bytes(size); |
1685 | 590 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) |
0 | 591 return res; |
592 } | |
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593 |
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594 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() { |
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595 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); |
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596 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) |
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597 return res; |
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598 } |
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599 |
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600 void* operator new [](size_t size) throw() { |
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601 address res = (address)resource_allocate_bytes(size); |
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602 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) |
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603 return res; |
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604 } |
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605 |
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606 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) throw() { |
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607 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); |
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608 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) |
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609 return res; |
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610 } |
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611 |
0 | 612 void operator delete(void* p); |
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613 void operator delete [](void* p); |
0 | 614 }; |
615 | |
616 // One of the following macros must be used when allocating an array | |
617 // or object to determine whether it should reside in the C heap on in | |
618 // the resource area. | |
619 | |
620 #define NEW_RESOURCE_ARRAY(type, size)\ | |
621 (type*) resource_allocate_bytes((size) * sizeof(type)) | |
622 | |
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623 #define NEW_RESOURCE_ARRAY_RETURN_NULL(type, size)\ |
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624 (type*) resource_allocate_bytes((size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
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625 |
0 | 626 #define NEW_RESOURCE_ARRAY_IN_THREAD(thread, type, size)\ |
627 (type*) resource_allocate_bytes(thread, (size) * sizeof(type)) | |
628 | |
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629 #define NEW_RESOURCE_ARRAY_IN_THREAD_RETURN_NULL(thread, type, size)\ |
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630 (type*) resource_allocate_bytes(thread, (size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
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631 |
0 | 632 #define REALLOC_RESOURCE_ARRAY(type, old, old_size, new_size)\ |
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633 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type), (new_size) * sizeof(type)) |
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634 |
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635 #define REALLOC_RESOURCE_ARRAY_RETURN_NULL(type, old, old_size, new_size)\ |
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636 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type),\ |
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637 (new_size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
0 | 638 |
639 #define FREE_RESOURCE_ARRAY(type, old, size)\ | |
640 resource_free_bytes((char*)(old), (size) * sizeof(type)) | |
641 | |
642 #define FREE_FAST(old)\ | |
643 /* nop */ | |
644 | |
645 #define NEW_RESOURCE_OBJ(type)\ | |
646 NEW_RESOURCE_ARRAY(type, 1) | |
647 | |
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648 #define NEW_RESOURCE_OBJ_RETURN_NULL(type)\ |
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649 NEW_RESOURCE_ARRAY_RETURN_NULL(type, 1) |
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650 |
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651 #define NEW_C_HEAP_ARRAY3(type, size, memflags, pc, allocfail)\ |
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652 (type*) AllocateHeap((size) * sizeof(type), memflags, pc, allocfail) |
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653 |
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654 #define NEW_C_HEAP_ARRAY2(type, size, memflags, pc)\ |
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655 (type*) (AllocateHeap((size) * sizeof(type), memflags, pc)) |
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656 |
6197 | 657 #define NEW_C_HEAP_ARRAY(type, size, memflags)\ |
658 (type*) (AllocateHeap((size) * sizeof(type), memflags)) | |
0 | 659 |
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660 #define NEW_C_HEAP_ARRAY2_RETURN_NULL(type, size, memflags, pc)\ |
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661 NEW_C_HEAP_ARRAY3(type, (size), memflags, pc, AllocFailStrategy::RETURN_NULL) |
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662 |
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663 #define NEW_C_HEAP_ARRAY_RETURN_NULL(type, size, memflags)\ |
20360 | 664 NEW_C_HEAP_ARRAY3(type, (size), memflags, CURRENT_PC, AllocFailStrategy::RETURN_NULL) |
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665 |
6197 | 666 #define REALLOC_C_HEAP_ARRAY(type, old, size, memflags)\ |
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667 (type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags)) |
6197 | 668 |
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669 #define REALLOC_C_HEAP_ARRAY_RETURN_NULL(type, old, size, memflags)\ |
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670 (type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags, AllocFailStrategy::RETURN_NULL)) |
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671 |
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672 #define FREE_C_HEAP_ARRAY(type, old, memflags) \ |
6197 | 673 FreeHeap((char*)(old), memflags) |
0 | 674 |
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675 // allocate type in heap without calling ctor |
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676 #define NEW_C_HEAP_OBJ(type, memflags)\ |
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677 NEW_C_HEAP_ARRAY(type, 1, memflags) |
0 | 678 |
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679 #define NEW_C_HEAP_OBJ_RETURN_NULL(type, memflags)\ |
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680 NEW_C_HEAP_ARRAY_RETURN_NULL(type, 1, memflags) |
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681 |
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682 // deallocate obj of type in heap without calling dtor |
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683 #define FREE_C_HEAP_OBJ(objname, memflags)\ |
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684 FreeHeap((char*)objname, memflags); |
0 | 685 |
686 // for statistics | |
687 #ifndef PRODUCT | |
688 class AllocStats : StackObj { | |
2250 | 689 julong start_mallocs, start_frees; |
690 julong start_malloc_bytes, start_mfree_bytes, start_res_bytes; | |
0 | 691 public: |
692 AllocStats(); | |
693 | |
2250 | 694 julong num_mallocs(); // since creation of receiver |
695 julong alloc_bytes(); | |
696 julong num_frees(); | |
697 julong free_bytes(); | |
698 julong resource_bytes(); | |
0 | 699 void print(); |
700 }; | |
701 #endif | |
702 | |
703 | |
704 //------------------------------ReallocMark--------------------------------- | |
705 // Code which uses REALLOC_RESOURCE_ARRAY should check an associated | |
706 // ReallocMark, which is declared in the same scope as the reallocated | |
707 // pointer. Any operation that could __potentially__ cause a reallocation | |
708 // should check the ReallocMark. | |
709 class ReallocMark: public StackObj { | |
710 protected: | |
711 NOT_PRODUCT(int _nesting;) | |
712 | |
713 public: | |
714 ReallocMark() PRODUCT_RETURN; | |
715 void check() PRODUCT_RETURN; | |
716 }; | |
1972 | 717 |
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718 // Helper class to allocate arrays that may become large. |
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719 // Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit |
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720 // and uses mapped memory for larger allocations. |
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721 // Most OS mallocs do something similar but Solaris malloc does not revert |
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722 // to mapped memory for large allocations. By default ArrayAllocatorMallocLimit |
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723 // is set so that we always use malloc except for Solaris where we set the |
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724 // limit to get mapped memory. |
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725 template <class E, MEMFLAGS F> |
10992 | 726 class ArrayAllocator VALUE_OBJ_CLASS_SPEC { |
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727 char* _addr; |
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728 bool _use_malloc; |
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729 size_t _size; |
10992 | 730 bool _free_in_destructor; |
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731 public: |
10992 | 732 ArrayAllocator(bool free_in_destructor = true) : |
733 _addr(NULL), _use_malloc(false), _size(0), _free_in_destructor(free_in_destructor) { } | |
734 | |
735 ~ArrayAllocator() { | |
736 if (_free_in_destructor) { | |
737 free(); | |
738 } | |
739 } | |
740 | |
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741 E* allocate(size_t length); |
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742 void free(); |
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743 }; |
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744 |
1972 | 745 #endif // SHARE_VM_MEMORY_ALLOCATION_HPP |