Mercurial > hg > graal-compiler
annotate src/share/vm/memory/allocation.hpp @ 14422:2b8e28fdf503
Merge
| author | kvn |
|---|---|
| date | Tue, 05 Nov 2013 17:38:04 -0800 |
| parents | e2722a66aba7 9758d9f36299 |
| children | abec000618bf |
| rev | line source |
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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 |
| 10405 | 160 mtTracing = 0x0F00, // memory used for Tracing |
| 161 mt_number_of_types = 0x000F, // number of memory types (mtDontTrack | |
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162 // is not included as validate type) |
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163 mtDontTrack = 0x0F00, // memory we do not or cannot track |
| 6197 | 164 mt_masks = 0x7F00, |
| 165 | |
| 166 // object type mask | |
| 167 otArena = 0x0010, // an arena object | |
| 168 otNMTRecorder = 0x0020, // memory recorder object | |
| 169 ot_masks = 0x00F0 | |
| 170 }; | |
| 171 | |
| 172 #define IS_MEMORY_TYPE(flags, type) ((flags & mt_masks) == type) | |
| 173 #define HAS_VALID_MEMORY_TYPE(flags)((flags & mt_masks) != mtNone) | |
| 174 #define FLAGS_TO_MEMORY_TYPE(flags) (flags & mt_masks) | |
| 175 | |
| 176 #define IS_ARENA_OBJ(flags) ((flags & ot_masks) == otArena) | |
| 177 #define IS_NMT_RECORDER(flags) ((flags & ot_masks) == otNMTRecorder) | |
| 178 #define NMT_CAN_TRACK(flags) (!IS_NMT_RECORDER(flags) && !(IS_MEMORY_TYPE(flags, mtDontTrack))) | |
| 179 | |
| 180 typedef unsigned short MEMFLAGS; | |
| 181 | |
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182 #if INCLUDE_NMT |
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183 |
| 6197 | 184 extern bool NMT_track_callsite; |
| 185 | |
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186 #else |
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187 |
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188 const bool NMT_track_callsite = false; |
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189 |
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190 #endif // INCLUDE_NMT |
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191 |
| 6197 | 192 // debug build does not inline |
| 9152 | 193 #if defined(_NMT_NOINLINE_) |
| 6197 | 194 #define CURRENT_PC (NMT_track_callsite ? os::get_caller_pc(1) : 0) |
| 195 #define CALLER_PC (NMT_track_callsite ? os::get_caller_pc(2) : 0) | |
| 196 #define CALLER_CALLER_PC (NMT_track_callsite ? os::get_caller_pc(3) : 0) | |
| 197 #else | |
| 198 #define CURRENT_PC (NMT_track_callsite? os::get_caller_pc(0) : 0) | |
| 199 #define CALLER_PC (NMT_track_callsite ? os::get_caller_pc(1) : 0) | |
| 200 #define CALLER_CALLER_PC (NMT_track_callsite ? os::get_caller_pc(2) : 0) | |
| 201 #endif | |
| 202 | |
| 203 | |
| 204 | |
| 205 template <MEMFLAGS F> class CHeapObj ALLOCATION_SUPER_CLASS_SPEC { | |
| 0 | 206 public: |
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207 _NOINLINE_ void* operator new(size_t size, address caller_pc = 0) throw(); |
| 6197 | 208 _NOINLINE_ void* operator new (size_t size, const std::nothrow_t& nothrow_constant, |
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209 address caller_pc = 0) throw(); |
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210 _NOINLINE_ void* operator new [](size_t size, address caller_pc = 0) throw(); |
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211 _NOINLINE_ void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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212 address caller_pc = 0) throw(); |
| 0 | 213 void operator delete(void* p); |
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214 void operator delete [] (void* p); |
| 0 | 215 }; |
| 216 | |
| 217 // Base class for objects allocated on the stack only. | |
| 218 // Calling new or delete will result in fatal error. | |
| 219 | |
| 220 class StackObj ALLOCATION_SUPER_CLASS_SPEC { | |
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221 private: |
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222 void* operator new(size_t size) throw(); |
| 14422 | 223 void* operator new [](size_t size) throw(); |
| 14411 | 224 #ifdef __IBMCPP__ |
| 225 public: | |
| 226 #endif | |
| 0 | 227 void operator delete(void* p); |
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228 void operator delete [](void* p); |
| 0 | 229 }; |
| 230 | |
| 231 // Base class for objects used as value objects. | |
| 232 // Calling new or delete will result in fatal error. | |
| 233 // | |
| 234 // Portability note: Certain compilers (e.g. gcc) will | |
| 235 // always make classes bigger if it has a superclass, even | |
| 236 // if the superclass does not have any virtual methods or | |
| 237 // instance fields. The HotSpot implementation relies on this | |
| 238 // not to happen. So never make a ValueObj class a direct subclass | |
| 239 // of this object, but use the VALUE_OBJ_CLASS_SPEC class instead, e.g., | |
| 240 // like this: | |
| 241 // | |
| 242 // class A VALUE_OBJ_CLASS_SPEC { | |
| 243 // ... | |
| 244 // } | |
| 245 // | |
| 246 // With gcc and possible other compilers the VALUE_OBJ_CLASS_SPEC can | |
| 247 // be defined as a an empty string "". | |
| 248 // | |
| 249 class _ValueObj { | |
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250 private: |
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251 void* operator new(size_t size) throw(); |
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252 void operator delete(void* p); |
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253 void* operator new [](size_t size) throw(); |
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254 void operator delete [](void* p); |
| 0 | 255 }; |
| 256 | |
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257 |
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258 // Base class for objects stored in Metaspace. |
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259 // Calling delete will result in fatal error. |
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260 // |
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261 // Do not inherit from something with a vptr because this class does |
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262 // not introduce one. This class is used to allocate both shared read-only |
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263 // and shared read-write classes. |
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264 // |
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265 |
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266 class ClassLoaderData; |
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267 |
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268 class MetaspaceObj { |
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269 public: |
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270 bool is_metaspace_object() const; // more specific test but slower |
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271 bool is_shared() const; |
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272 void print_address_on(outputStream* st) const; // nonvirtual address printing |
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273 |
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274 #define METASPACE_OBJ_TYPES_DO(f) \ |
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275 f(Unknown) \ |
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276 f(Class) \ |
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277 f(Symbol) \ |
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278 f(TypeArrayU1) \ |
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279 f(TypeArrayU2) \ |
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280 f(TypeArrayU4) \ |
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281 f(TypeArrayU8) \ |
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282 f(TypeArrayOther) \ |
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283 f(Method) \ |
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284 f(ConstMethod) \ |
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285 f(MethodData) \ |
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286 f(ConstantPool) \ |
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287 f(ConstantPoolCache) \ |
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288 f(Annotation) \ |
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289 f(MethodCounters) |
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290 |
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291 #define METASPACE_OBJ_TYPE_DECLARE(name) name ## Type, |
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292 #define METASPACE_OBJ_TYPE_NAME_CASE(name) case name ## Type: return #name; |
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293 |
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294 enum Type { |
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295 // Types are MetaspaceObj::ClassType, MetaspaceObj::SymbolType, etc |
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296 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_DECLARE) |
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297 _number_of_types |
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298 }; |
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299 |
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300 static const char * type_name(Type type) { |
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301 switch(type) { |
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302 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_NAME_CASE) |
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303 default: |
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304 ShouldNotReachHere(); |
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305 return NULL; |
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306 } |
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307 } |
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308 |
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309 static MetaspaceObj::Type array_type(size_t elem_size) { |
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310 switch (elem_size) { |
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311 case 1: return TypeArrayU1Type; |
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312 case 2: return TypeArrayU2Type; |
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313 case 4: return TypeArrayU4Type; |
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314 case 8: return TypeArrayU8Type; |
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315 default: |
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316 return TypeArrayOtherType; |
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317 } |
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318 } |
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319 |
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320 void* operator new(size_t size, ClassLoaderData* loader_data, |
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321 size_t word_size, bool read_only, |
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322 Type type, Thread* thread) throw(); |
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323 // can't use TRAPS from this header file. |
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324 void operator delete(void* p) { ShouldNotCallThis(); } |
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325 }; |
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326 |
| 0 | 327 // Base class for classes that constitute name spaces. |
| 328 | |
| 329 class AllStatic { | |
| 330 public: | |
| 331 AllStatic() { ShouldNotCallThis(); } | |
| 332 ~AllStatic() { ShouldNotCallThis(); } | |
| 333 }; | |
| 334 | |
| 335 | |
| 336 //------------------------------Chunk------------------------------------------ | |
| 337 // Linked list of raw memory chunks | |
| 6197 | 338 class Chunk: CHeapObj<mtChunk> { |
| 3939 | 339 friend class VMStructs; |
| 340 | |
| 0 | 341 protected: |
| 342 Chunk* _next; // Next Chunk in list | |
| 343 const size_t _len; // Size of this Chunk | |
| 344 public: | |
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345 void* operator new(size_t size, AllocFailType alloc_failmode, size_t length) throw(); |
| 0 | 346 void operator delete(void* p); |
| 347 Chunk(size_t length); | |
| 348 | |
| 349 enum { | |
| 350 // default sizes; make them slightly smaller than 2**k to guard against | |
| 351 // buddy-system style malloc implementations | |
| 352 #ifdef _LP64 | |
| 353 slack = 40, // [RGV] Not sure if this is right, but make it | |
| 354 // a multiple of 8. | |
| 355 #else | |
| 356 slack = 20, // suspected sizeof(Chunk) + internal malloc headers | |
| 357 #endif | |
| 358 | |
| 11095 | 359 tiny_size = 256 - slack, // Size of first chunk (tiny) |
| 360 init_size = 1*K - slack, // Size of first chunk (normal aka small) | |
| 0 | 361 medium_size= 10*K - slack, // Size of medium-sized chunk |
| 362 size = 32*K - slack, // Default size of an Arena chunk (following the first) | |
| 363 non_pool_size = init_size + 32 // An initial size which is not one of above | |
| 364 }; | |
| 365 | |
| 366 void chop(); // Chop this chunk | |
| 367 void next_chop(); // Chop next chunk | |
| 368 static size_t aligned_overhead_size(void) { return ARENA_ALIGN(sizeof(Chunk)); } | |
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369 static size_t aligned_overhead_size(size_t byte_size) { return ARENA_ALIGN(byte_size); } |
| 0 | 370 |
| 371 size_t length() const { return _len; } | |
| 372 Chunk* next() const { return _next; } | |
| 373 void set_next(Chunk* n) { _next = n; } | |
| 374 // Boundaries of data area (possibly unused) | |
| 375 char* bottom() const { return ((char*) this) + aligned_overhead_size(); } | |
| 376 char* top() const { return bottom() + _len; } | |
| 377 bool contains(char* p) const { return bottom() <= p && p <= top(); } | |
| 378 | |
| 379 // Start the chunk_pool cleaner task | |
| 380 static void start_chunk_pool_cleaner_task(); | |
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381 |
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382 static void clean_chunk_pool(); |
| 0 | 383 }; |
| 384 | |
| 385 //------------------------------Arena------------------------------------------ | |
| 386 // Fast allocation of memory | |
| 6197 | 387 class Arena : public CHeapObj<mtNone|otArena> { |
| 0 | 388 protected: |
| 389 friend class ResourceMark; | |
| 390 friend class HandleMark; | |
| 391 friend class NoHandleMark; | |
| 3939 | 392 friend class VMStructs; |
| 393 | |
| 0 | 394 Chunk *_first; // First chunk |
| 395 Chunk *_chunk; // current chunk | |
| 396 char *_hwm, *_max; // High water mark and max in current chunk | |
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397 // Get a new Chunk of at least size x |
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398 void* grow(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
| 6197 | 399 size_t _size_in_bytes; // Size of arena (used for native memory tracking) |
| 400 | |
| 2250 | 401 NOT_PRODUCT(static julong _bytes_allocated;) // total #bytes allocated since start |
| 0 | 402 friend class AllocStats; |
| 403 debug_only(void* malloc(size_t size);) | |
| 404 debug_only(void* internal_malloc_4(size_t x);) | |
| 2250 | 405 NOT_PRODUCT(void inc_bytes_allocated(size_t x);) |
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406 |
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407 void signal_out_of_memory(size_t request, const char* whence) const; |
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408 |
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409 bool check_for_overflow(size_t request, const char* whence, |
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410 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) const { |
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411 if (UINTPTR_MAX - request < (uintptr_t)_hwm) { |
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412 if (alloc_failmode == AllocFailStrategy::RETURN_NULL) { |
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413 return false; |
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414 } |
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415 signal_out_of_memory(request, whence); |
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416 } |
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417 return true; |
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418 } |
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419 |
| 0 | 420 public: |
| 421 Arena(); | |
| 422 Arena(size_t init_size); | |
| 423 ~Arena(); | |
| 424 void destruct_contents(); | |
| 425 char* hwm() const { return _hwm; } | |
| 426 | |
| 6197 | 427 // new operators |
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428 void* operator new (size_t size) throw(); |
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429 void* operator new (size_t size, const std::nothrow_t& nothrow_constant) throw(); |
| 6197 | 430 |
| 431 // dynamic memory type tagging | |
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432 void* operator new(size_t size, MEMFLAGS flags) throw(); |
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433 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags) throw(); |
| 6197 | 434 void operator delete(void* p); |
| 435 | |
| 0 | 436 // Fast allocate in the arena. Common case is: pointer test + increment. |
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437 void* Amalloc(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
| 0 | 438 assert(is_power_of_2(ARENA_AMALLOC_ALIGNMENT) , "should be a power of 2"); |
| 439 x = ARENA_ALIGN(x); | |
| 440 debug_only(if (UseMallocOnly) return malloc(x);) | |
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441 if (!check_for_overflow(x, "Arena::Amalloc", alloc_failmode)) |
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442 return NULL; |
| 2250 | 443 NOT_PRODUCT(inc_bytes_allocated(x);) |
| 0 | 444 if (_hwm + x > _max) { |
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445 return grow(x, alloc_failmode); |
| 0 | 446 } else { |
| 447 char *old = _hwm; | |
| 448 _hwm += x; | |
| 449 return old; | |
| 450 } | |
| 451 } | |
| 452 // Further assume size is padded out to words | |
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453 void *Amalloc_4(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
| 0 | 454 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); |
| 455 debug_only(if (UseMallocOnly) return malloc(x);) | |
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456 if (!check_for_overflow(x, "Arena::Amalloc_4", alloc_failmode)) |
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457 return NULL; |
| 2250 | 458 NOT_PRODUCT(inc_bytes_allocated(x);) |
| 0 | 459 if (_hwm + x > _max) { |
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460 return grow(x, alloc_failmode); |
| 0 | 461 } else { |
| 462 char *old = _hwm; | |
| 463 _hwm += x; | |
| 464 return old; | |
| 465 } | |
| 466 } | |
| 467 | |
| 468 // Allocate with 'double' alignment. It is 8 bytes on sparc. | |
| 469 // In other cases Amalloc_D() should be the same as Amalloc_4(). | |
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470 void* Amalloc_D(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
| 0 | 471 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); |
| 472 debug_only(if (UseMallocOnly) return malloc(x);) | |
| 473 #if defined(SPARC) && !defined(_LP64) | |
| 474 #define DALIGN_M1 7 | |
| 475 size_t delta = (((size_t)_hwm + DALIGN_M1) & ~DALIGN_M1) - (size_t)_hwm; | |
| 476 x += delta; | |
| 477 #endif | |
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478 if (!check_for_overflow(x, "Arena::Amalloc_D", alloc_failmode)) |
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479 return NULL; |
| 2250 | 480 NOT_PRODUCT(inc_bytes_allocated(x);) |
| 0 | 481 if (_hwm + x > _max) { |
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482 return grow(x, alloc_failmode); // grow() returns a result aligned >= 8 bytes. |
| 0 | 483 } else { |
| 484 char *old = _hwm; | |
| 485 _hwm += x; | |
| 486 #if defined(SPARC) && !defined(_LP64) | |
| 487 old += delta; // align to 8-bytes | |
| 488 #endif | |
| 489 return old; | |
| 490 } | |
| 491 } | |
| 492 | |
| 493 // Fast delete in area. Common case is: NOP (except for storage reclaimed) | |
| 494 void Afree(void *ptr, size_t size) { | |
| 495 #ifdef ASSERT | |
| 496 if (ZapResourceArea) memset(ptr, badResourceValue, size); // zap freed memory | |
| 497 if (UseMallocOnly) return; | |
| 498 #endif | |
| 499 if (((char*)ptr) + size == _hwm) _hwm = (char*)ptr; | |
| 500 } | |
| 501 | |
|
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502 void *Arealloc( void *old_ptr, size_t old_size, size_t new_size, |
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503 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
| 0 | 504 |
| 505 // Move contents of this arena into an empty arena | |
| 506 Arena *move_contents(Arena *empty_arena); | |
| 507 | |
| 508 // Determine if pointer belongs to this Arena or not. | |
| 509 bool contains( const void *ptr ) const; | |
| 510 | |
| 511 // Total of all chunks in use (not thread-safe) | |
| 512 size_t used() const; | |
| 513 | |
| 514 // Total # of bytes used | |
| 6197 | 515 size_t size_in_bytes() const { return _size_in_bytes; }; |
| 516 void set_size_in_bytes(size_t size); | |
| 517 | |
| 0 | 518 static void free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) PRODUCT_RETURN; |
| 519 static void free_all(char** start, char** end) PRODUCT_RETURN; | |
| 520 | |
| 6197 | 521 // how many arena instances |
| 522 NOT_PRODUCT(static volatile jint _instance_count;) | |
| 0 | 523 private: |
| 524 // Reset this Arena to empty, access will trigger grow if necessary | |
| 525 void reset(void) { | |
| 526 _first = _chunk = NULL; | |
| 527 _hwm = _max = NULL; | |
| 6197 | 528 set_size_in_bytes(0); |
| 0 | 529 } |
| 530 }; | |
| 531 | |
| 532 // One of the following macros must be used when allocating | |
| 533 // an array or object from an arena | |
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534 #define NEW_ARENA_ARRAY(arena, type, size) \ |
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535 (type*) (arena)->Amalloc((size) * sizeof(type)) |
| 0 | 536 |
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537 #define REALLOC_ARENA_ARRAY(arena, type, old, old_size, new_size) \ |
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538 (type*) (arena)->Arealloc((char*)(old), (old_size) * sizeof(type), \ |
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539 (new_size) * sizeof(type) ) |
| 0 | 540 |
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541 #define FREE_ARENA_ARRAY(arena, type, old, size) \ |
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542 (arena)->Afree((char*)(old), (size) * sizeof(type)) |
| 0 | 543 |
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544 #define NEW_ARENA_OBJ(arena, type) \ |
| 0 | 545 NEW_ARENA_ARRAY(arena, type, 1) |
| 546 | |
| 547 | |
| 548 //%note allocation_1 | |
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549 extern char* resource_allocate_bytes(size_t size, |
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550 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
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551 extern char* resource_allocate_bytes(Thread* thread, size_t size, |
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552 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
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553 extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size, |
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554 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
| 0 | 555 extern void resource_free_bytes( char *old, size_t size ); |
| 556 | |
| 557 //---------------------------------------------------------------------- | |
| 558 // Base class for objects allocated in the resource area per default. | |
| 559 // Optionally, objects may be allocated on the C heap with | |
| 560 // new(ResourceObj::C_HEAP) Foo(...) or in an Arena with new (&arena) | |
| 561 // ResourceObj's can be allocated within other objects, but don't use | |
| 562 // new or delete (allocation_type is unknown). If new is used to allocate, | |
| 563 // use delete to deallocate. | |
| 564 class ResourceObj ALLOCATION_SUPER_CLASS_SPEC { | |
| 565 public: | |
| 1685 | 566 enum allocation_type { STACK_OR_EMBEDDED = 0, RESOURCE_AREA, C_HEAP, ARENA, allocation_mask = 0x3 }; |
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567 static void set_allocation_type(address res, allocation_type type) NOT_DEBUG_RETURN; |
| 0 | 568 #ifdef ASSERT |
| 569 private: | |
| 1685 | 570 // When this object is allocated on stack the new() operator is not |
| 571 // called but garbage on stack may look like a valid allocation_type. | |
| 572 // Store negated 'this' pointer when new() is called to distinguish cases. | |
|
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573 // Use second array's element for verification value to distinguish garbage. |
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574 uintptr_t _allocation_t[2]; |
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575 bool is_type_set() const; |
| 0 | 576 public: |
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577 allocation_type get_allocation_type() const; |
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578 bool allocated_on_stack() const { return get_allocation_type() == STACK_OR_EMBEDDED; } |
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579 bool allocated_on_res_area() const { return get_allocation_type() == RESOURCE_AREA; } |
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580 bool allocated_on_C_heap() const { return get_allocation_type() == C_HEAP; } |
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581 bool allocated_on_arena() const { return get_allocation_type() == ARENA; } |
| 1685 | 582 ResourceObj(); // default construtor |
| 583 ResourceObj(const ResourceObj& r); // default copy construtor | |
| 584 ResourceObj& operator=(const ResourceObj& r); // default copy assignment | |
| 585 ~ResourceObj(); | |
| 0 | 586 #endif // ASSERT |
| 587 | |
| 588 public: | |
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589 void* operator new(size_t size, allocation_type type, MEMFLAGS flags) throw(); |
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590 void* operator new [](size_t size, allocation_type type, MEMFLAGS flags) throw(); |
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591 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, |
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592 allocation_type type, MEMFLAGS flags) throw(); |
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593 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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594 allocation_type type, MEMFLAGS flags) throw(); |
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595 |
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596 void* operator new(size_t size, Arena *arena) throw() { |
| 0 | 597 address res = (address)arena->Amalloc(size); |
| 1685 | 598 DEBUG_ONLY(set_allocation_type(res, ARENA);) |
| 0 | 599 return res; |
| 600 } | |
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601 |
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602 void* operator new [](size_t size, Arena *arena) throw() { |
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603 address res = (address)arena->Amalloc(size); |
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604 DEBUG_ONLY(set_allocation_type(res, ARENA);) |
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605 return res; |
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606 } |
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607 |
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608 void* operator new(size_t size) throw() { |
| 0 | 609 address res = (address)resource_allocate_bytes(size); |
| 1685 | 610 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) |
| 0 | 611 return res; |
| 612 } | |
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613 |
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614 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() { |
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615 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); |
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616 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) |
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617 return res; |
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618 } |
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619 |
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620 void* operator new [](size_t size) throw() { |
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621 address res = (address)resource_allocate_bytes(size); |
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622 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) |
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623 return res; |
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624 } |
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625 |
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626 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) throw() { |
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627 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); |
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628 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) |
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629 return res; |
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630 } |
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631 |
| 0 | 632 void operator delete(void* p); |
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633 void operator delete [](void* p); |
| 0 | 634 }; |
| 635 | |
| 636 // One of the following macros must be used when allocating an array | |
| 637 // or object to determine whether it should reside in the C heap on in | |
| 638 // the resource area. | |
| 639 | |
| 640 #define NEW_RESOURCE_ARRAY(type, size)\ | |
| 641 (type*) resource_allocate_bytes((size) * sizeof(type)) | |
| 642 | |
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643 #define NEW_RESOURCE_ARRAY_RETURN_NULL(type, size)\ |
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644 (type*) resource_allocate_bytes((size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
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645 |
| 0 | 646 #define NEW_RESOURCE_ARRAY_IN_THREAD(thread, type, size)\ |
| 647 (type*) resource_allocate_bytes(thread, (size) * sizeof(type)) | |
| 648 | |
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649 #define NEW_RESOURCE_ARRAY_IN_THREAD_RETURN_NULL(thread, type, size)\ |
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650 (type*) resource_allocate_bytes(thread, (size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
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651 |
| 0 | 652 #define REALLOC_RESOURCE_ARRAY(type, old, old_size, new_size)\ |
|
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653 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type), (new_size) * sizeof(type)) |
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654 |
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655 #define REALLOC_RESOURCE_ARRAY_RETURN_NULL(type, old, old_size, new_size)\ |
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656 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type),\ |
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657 (new_size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
| 0 | 658 |
| 659 #define FREE_RESOURCE_ARRAY(type, old, size)\ | |
| 660 resource_free_bytes((char*)(old), (size) * sizeof(type)) | |
| 661 | |
| 662 #define FREE_FAST(old)\ | |
| 663 /* nop */ | |
| 664 | |
| 665 #define NEW_RESOURCE_OBJ(type)\ | |
| 666 NEW_RESOURCE_ARRAY(type, 1) | |
| 667 | |
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668 #define NEW_RESOURCE_OBJ_RETURN_NULL(type)\ |
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669 NEW_RESOURCE_ARRAY_RETURN_NULL(type, 1) |
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670 |
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671 #define NEW_C_HEAP_ARRAY3(type, size, memflags, pc, allocfail)\ |
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672 (type*) AllocateHeap((size) * sizeof(type), memflags, pc, allocfail) |
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673 |
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674 #define NEW_C_HEAP_ARRAY2(type, size, memflags, pc)\ |
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675 (type*) (AllocateHeap((size) * sizeof(type), memflags, pc)) |
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676 |
| 6197 | 677 #define NEW_C_HEAP_ARRAY(type, size, memflags)\ |
| 678 (type*) (AllocateHeap((size) * sizeof(type), memflags)) | |
| 0 | 679 |
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680 #define NEW_C_HEAP_ARRAY2_RETURN_NULL(type, size, memflags, pc)\ |
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681 NEW_C_HEAP_ARRAY3(type, (size), memflags, pc, AllocFailStrategy::RETURN_NULL) |
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682 |
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683 #define NEW_C_HEAP_ARRAY_RETURN_NULL(type, size, memflags)\ |
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684 NEW_C_HEAP_ARRAY3(type, (size), memflags, (address)0, AllocFailStrategy::RETURN_NULL) |
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685 |
| 6197 | 686 #define REALLOC_C_HEAP_ARRAY(type, old, size, memflags)\ |
|
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687 (type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags)) |
| 6197 | 688 |
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689 #define REALLOC_C_HEAP_ARRAY_RETURN_NULL(type, old, size, memflags)\ |
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690 (type*) (ReallocateHeap((char*)(old), (size) * sizeof(type), memflags, AllocFailStrategy::RETURN_NULL)) |
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691 |
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692 #define FREE_C_HEAP_ARRAY(type, old, memflags) \ |
| 6197 | 693 FreeHeap((char*)(old), memflags) |
| 0 | 694 |
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695 // allocate type in heap without calling ctor |
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696 #define NEW_C_HEAP_OBJ(type, memflags)\ |
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697 NEW_C_HEAP_ARRAY(type, 1, memflags) |
| 0 | 698 |
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699 #define NEW_C_HEAP_OBJ_RETURN_NULL(type, memflags)\ |
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700 NEW_C_HEAP_ARRAY_RETURN_NULL(type, 1, memflags) |
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701 |
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702 // deallocate obj of type in heap without calling dtor |
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703 #define FREE_C_HEAP_OBJ(objname, memflags)\ |
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704 FreeHeap((char*)objname, memflags); |
| 0 | 705 |
| 706 // for statistics | |
| 707 #ifndef PRODUCT | |
| 708 class AllocStats : StackObj { | |
| 2250 | 709 julong start_mallocs, start_frees; |
| 710 julong start_malloc_bytes, start_mfree_bytes, start_res_bytes; | |
| 0 | 711 public: |
| 712 AllocStats(); | |
| 713 | |
| 2250 | 714 julong num_mallocs(); // since creation of receiver |
| 715 julong alloc_bytes(); | |
| 716 julong num_frees(); | |
| 717 julong free_bytes(); | |
| 718 julong resource_bytes(); | |
| 0 | 719 void print(); |
| 720 }; | |
| 721 #endif | |
| 722 | |
| 723 | |
| 724 //------------------------------ReallocMark--------------------------------- | |
| 725 // Code which uses REALLOC_RESOURCE_ARRAY should check an associated | |
| 726 // ReallocMark, which is declared in the same scope as the reallocated | |
| 727 // pointer. Any operation that could __potentially__ cause a reallocation | |
| 728 // should check the ReallocMark. | |
| 729 class ReallocMark: public StackObj { | |
| 730 protected: | |
| 731 NOT_PRODUCT(int _nesting;) | |
| 732 | |
| 733 public: | |
| 734 ReallocMark() PRODUCT_RETURN; | |
| 735 void check() PRODUCT_RETURN; | |
| 736 }; | |
| 1972 | 737 |
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738 // Helper class to allocate arrays that may become large. |
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739 // Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit |
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740 // and uses mapped memory for larger allocations. |
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741 // Most OS mallocs do something similar but Solaris malloc does not revert |
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742 // to mapped memory for large allocations. By default ArrayAllocatorMallocLimit |
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743 // is set so that we always use malloc except for Solaris where we set the |
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744 // limit to get mapped memory. |
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745 template <class E, MEMFLAGS F> |
| 10992 | 746 class ArrayAllocator VALUE_OBJ_CLASS_SPEC { |
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747 char* _addr; |
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748 bool _use_malloc; |
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749 size_t _size; |
| 10992 | 750 bool _free_in_destructor; |
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751 public: |
| 10992 | 752 ArrayAllocator(bool free_in_destructor = true) : |
| 753 _addr(NULL), _use_malloc(false), _size(0), _free_in_destructor(free_in_destructor) { } | |
| 754 | |
| 755 ~ArrayAllocator() { | |
| 756 if (_free_in_destructor) { | |
| 757 free(); | |
| 758 } | |
| 759 } | |
| 760 | |
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761 E* allocate(size_t length); |
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762 void free(); |
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763 }; |
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764 |
| 1972 | 765 #endif // SHARE_VM_MEMORY_ALLOCATION_HPP |