Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/allocation.hpp @ 10408:836a62f43af9
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 19 Jun 2013 10:45:56 +0200 |
parents | 43223d3f5dcd f2110083203d |
children | 6b0fd0964b87 |
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: |
6197 | 207 _NOINLINE_ void* operator new(size_t size, address caller_pc = 0); |
208 _NOINLINE_ void* operator new (size_t size, const std::nothrow_t& nothrow_constant, | |
209 address caller_pc = 0); | |
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210 _NOINLINE_ void* operator new [](size_t size, address caller_pc = 0); |
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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); |
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: |
0 | 222 void* operator new(size_t size); |
223 void operator delete(void* p); | |
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224 void* operator new [](size_t size); |
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225 void operator delete [](void* p); |
0 | 226 }; |
227 | |
228 // Base class for objects used as value objects. | |
229 // Calling new or delete will result in fatal error. | |
230 // | |
231 // Portability note: Certain compilers (e.g. gcc) will | |
232 // always make classes bigger if it has a superclass, even | |
233 // if the superclass does not have any virtual methods or | |
234 // instance fields. The HotSpot implementation relies on this | |
235 // not to happen. So never make a ValueObj class a direct subclass | |
236 // of this object, but use the VALUE_OBJ_CLASS_SPEC class instead, e.g., | |
237 // like this: | |
238 // | |
239 // class A VALUE_OBJ_CLASS_SPEC { | |
240 // ... | |
241 // } | |
242 // | |
243 // With gcc and possible other compilers the VALUE_OBJ_CLASS_SPEC can | |
244 // be defined as a an empty string "". | |
245 // | |
246 class _ValueObj { | |
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247 private: |
0 | 248 void* operator new(size_t size); |
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249 void operator delete(void* p); |
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250 void* operator new [](size_t size); |
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251 void operator delete [](void* p); |
0 | 252 }; |
253 | |
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254 |
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255 // Base class for objects stored in Metaspace. |
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256 // Calling delete will result in fatal error. |
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257 // |
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258 // Do not inherit from something with a vptr because this class does |
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259 // not introduce one. This class is used to allocate both shared read-only |
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260 // and shared read-write classes. |
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261 // |
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262 |
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263 class ClassLoaderData; |
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264 |
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265 class MetaspaceObj { |
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266 public: |
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267 bool is_metadata() const; |
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268 bool is_metaspace_object() const; // more specific test but slower |
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269 bool is_shared() const; |
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270 void print_address_on(outputStream* st) const; // nonvirtual address printing |
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271 |
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272 #define METASPACE_OBJ_TYPES_DO(f) \ |
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273 f(Unknown) \ |
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274 f(Class) \ |
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275 f(Symbol) \ |
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276 f(TypeArrayU1) \ |
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277 f(TypeArrayU2) \ |
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278 f(TypeArrayU4) \ |
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279 f(TypeArrayU8) \ |
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280 f(TypeArrayOther) \ |
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281 f(Method) \ |
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282 f(ConstMethod) \ |
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283 f(MethodData) \ |
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284 f(ConstantPool) \ |
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285 f(ConstantPoolCache) \ |
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286 f(Annotation) \ |
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287 f(MethodCounters) |
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288 |
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289 #define METASPACE_OBJ_TYPE_DECLARE(name) name ## Type, |
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290 #define METASPACE_OBJ_TYPE_NAME_CASE(name) case name ## Type: return #name; |
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291 |
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292 enum Type { |
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293 // Types are MetaspaceObj::ClassType, MetaspaceObj::SymbolType, etc |
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294 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_DECLARE) |
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295 _number_of_types |
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296 }; |
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297 |
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298 static const char * type_name(Type type) { |
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299 switch(type) { |
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300 METASPACE_OBJ_TYPES_DO(METASPACE_OBJ_TYPE_NAME_CASE) |
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301 default: |
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302 ShouldNotReachHere(); |
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303 return NULL; |
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304 } |
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305 } |
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306 |
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307 static MetaspaceObj::Type array_type(size_t elem_size) { |
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308 switch (elem_size) { |
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309 case 1: return TypeArrayU1Type; |
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310 case 2: return TypeArrayU2Type; |
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311 case 4: return TypeArrayU4Type; |
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312 case 8: return TypeArrayU8Type; |
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313 default: |
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314 return TypeArrayOtherType; |
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315 } |
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316 } |
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317 |
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318 void* operator new(size_t size, ClassLoaderData* loader_data, |
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319 size_t word_size, bool read_only, |
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320 Type type, Thread* thread); |
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321 // can't use TRAPS from this header file. |
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322 void operator delete(void* p) { ShouldNotCallThis(); } |
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323 }; |
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324 |
0 | 325 // Base class for classes that constitute name spaces. |
326 | |
327 class AllStatic { | |
328 public: | |
329 AllStatic() { ShouldNotCallThis(); } | |
330 ~AllStatic() { ShouldNotCallThis(); } | |
331 }; | |
332 | |
333 | |
334 //------------------------------Chunk------------------------------------------ | |
335 // Linked list of raw memory chunks | |
6197 | 336 class Chunk: CHeapObj<mtChunk> { |
3939 | 337 friend class VMStructs; |
338 | |
0 | 339 protected: |
340 Chunk* _next; // Next Chunk in list | |
341 const size_t _len; // Size of this Chunk | |
342 public: | |
343 void* operator new(size_t size, size_t length); | |
344 void operator delete(void* p); | |
345 Chunk(size_t length); | |
346 | |
347 enum { | |
348 // default sizes; make them slightly smaller than 2**k to guard against | |
349 // buddy-system style malloc implementations | |
350 #ifdef _LP64 | |
351 slack = 40, // [RGV] Not sure if this is right, but make it | |
352 // a multiple of 8. | |
353 #else | |
354 slack = 20, // suspected sizeof(Chunk) + internal malloc headers | |
355 #endif | |
356 | |
357 init_size = 1*K - slack, // Size of first chunk | |
358 medium_size= 10*K - slack, // Size of medium-sized chunk | |
359 size = 32*K - slack, // Default size of an Arena chunk (following the first) | |
360 non_pool_size = init_size + 32 // An initial size which is not one of above | |
361 }; | |
362 | |
363 void chop(); // Chop this chunk | |
364 void next_chop(); // Chop next chunk | |
365 static size_t aligned_overhead_size(void) { return ARENA_ALIGN(sizeof(Chunk)); } | |
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366 static size_t aligned_overhead_size(size_t byte_size) { return ARENA_ALIGN(byte_size); } |
0 | 367 |
368 size_t length() const { return _len; } | |
369 Chunk* next() const { return _next; } | |
370 void set_next(Chunk* n) { _next = n; } | |
371 // Boundaries of data area (possibly unused) | |
372 char* bottom() const { return ((char*) this) + aligned_overhead_size(); } | |
373 char* top() const { return bottom() + _len; } | |
374 bool contains(char* p) const { return bottom() <= p && p <= top(); } | |
375 | |
376 // Start the chunk_pool cleaner task | |
377 static void start_chunk_pool_cleaner_task(); | |
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378 |
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379 static void clean_chunk_pool(); |
0 | 380 }; |
381 | |
382 //------------------------------Arena------------------------------------------ | |
383 // Fast allocation of memory | |
6197 | 384 class Arena : public CHeapObj<mtNone|otArena> { |
0 | 385 protected: |
386 friend class ResourceMark; | |
387 friend class HandleMark; | |
388 friend class NoHandleMark; | |
3939 | 389 friend class VMStructs; |
390 | |
0 | 391 Chunk *_first; // First chunk |
392 Chunk *_chunk; // current chunk | |
393 char *_hwm, *_max; // High water mark and max in current chunk | |
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394 // Get a new Chunk of at least size x |
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395 void* grow(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
6197 | 396 size_t _size_in_bytes; // Size of arena (used for native memory tracking) |
397 | |
2250 | 398 NOT_PRODUCT(static julong _bytes_allocated;) // total #bytes allocated since start |
0 | 399 friend class AllocStats; |
400 debug_only(void* malloc(size_t size);) | |
401 debug_only(void* internal_malloc_4(size_t x);) | |
2250 | 402 NOT_PRODUCT(void inc_bytes_allocated(size_t x);) |
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403 |
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404 void signal_out_of_memory(size_t request, const char* whence) const; |
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405 |
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406 void check_for_overflow(size_t request, const char* whence) const { |
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407 if (UINTPTR_MAX - request < (uintptr_t)_hwm) { |
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408 signal_out_of_memory(request, whence); |
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409 } |
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410 } |
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411 |
0 | 412 public: |
413 Arena(); | |
414 Arena(size_t init_size); | |
415 ~Arena(); | |
416 void destruct_contents(); | |
417 char* hwm() const { return _hwm; } | |
418 | |
6197 | 419 // new operators |
420 void* operator new (size_t size); | |
421 void* operator new (size_t size, const std::nothrow_t& nothrow_constant); | |
422 | |
423 // dynamic memory type tagging | |
424 void* operator new(size_t size, MEMFLAGS flags); | |
425 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags); | |
426 void operator delete(void* p); | |
427 | |
0 | 428 // Fast allocate in the arena. Common case is: pointer test + increment. |
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429 void* Amalloc(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
0 | 430 assert(is_power_of_2(ARENA_AMALLOC_ALIGNMENT) , "should be a power of 2"); |
431 x = ARENA_ALIGN(x); | |
432 debug_only(if (UseMallocOnly) return malloc(x);) | |
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433 check_for_overflow(x, "Arena::Amalloc"); |
2250 | 434 NOT_PRODUCT(inc_bytes_allocated(x);) |
0 | 435 if (_hwm + x > _max) { |
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436 return grow(x, alloc_failmode); |
0 | 437 } else { |
438 char *old = _hwm; | |
439 _hwm += x; | |
440 return old; | |
441 } | |
442 } | |
443 // Further assume size is padded out to words | |
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444 void *Amalloc_4(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
0 | 445 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); |
446 debug_only(if (UseMallocOnly) return malloc(x);) | |
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447 check_for_overflow(x, "Arena::Amalloc_4"); |
2250 | 448 NOT_PRODUCT(inc_bytes_allocated(x);) |
0 | 449 if (_hwm + x > _max) { |
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450 return grow(x, alloc_failmode); |
0 | 451 } else { |
452 char *old = _hwm; | |
453 _hwm += x; | |
454 return old; | |
455 } | |
456 } | |
457 | |
458 // Allocate with 'double' alignment. It is 8 bytes on sparc. | |
459 // In other cases Amalloc_D() should be the same as Amalloc_4(). | |
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460 void* Amalloc_D(size_t x, AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM) { |
0 | 461 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); |
462 debug_only(if (UseMallocOnly) return malloc(x);) | |
463 #if defined(SPARC) && !defined(_LP64) | |
464 #define DALIGN_M1 7 | |
465 size_t delta = (((size_t)_hwm + DALIGN_M1) & ~DALIGN_M1) - (size_t)_hwm; | |
466 x += delta; | |
467 #endif | |
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468 check_for_overflow(x, "Arena::Amalloc_D"); |
2250 | 469 NOT_PRODUCT(inc_bytes_allocated(x);) |
0 | 470 if (_hwm + x > _max) { |
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471 return grow(x, alloc_failmode); // grow() returns a result aligned >= 8 bytes. |
0 | 472 } else { |
473 char *old = _hwm; | |
474 _hwm += x; | |
475 #if defined(SPARC) && !defined(_LP64) | |
476 old += delta; // align to 8-bytes | |
477 #endif | |
478 return old; | |
479 } | |
480 } | |
481 | |
482 // Fast delete in area. Common case is: NOP (except for storage reclaimed) | |
483 void Afree(void *ptr, size_t size) { | |
484 #ifdef ASSERT | |
485 if (ZapResourceArea) memset(ptr, badResourceValue, size); // zap freed memory | |
486 if (UseMallocOnly) return; | |
487 #endif | |
488 if (((char*)ptr) + size == _hwm) _hwm = (char*)ptr; | |
489 } | |
490 | |
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491 void *Arealloc( void *old_ptr, size_t old_size, size_t new_size, |
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492 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
0 | 493 |
494 // Move contents of this arena into an empty arena | |
495 Arena *move_contents(Arena *empty_arena); | |
496 | |
497 // Determine if pointer belongs to this Arena or not. | |
498 bool contains( const void *ptr ) const; | |
499 | |
500 // Total of all chunks in use (not thread-safe) | |
501 size_t used() const; | |
502 | |
503 // Total # of bytes used | |
6197 | 504 size_t size_in_bytes() const { return _size_in_bytes; }; |
505 void set_size_in_bytes(size_t size); | |
506 | |
0 | 507 static void free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) PRODUCT_RETURN; |
508 static void free_all(char** start, char** end) PRODUCT_RETURN; | |
509 | |
6197 | 510 // how many arena instances |
511 NOT_PRODUCT(static volatile jint _instance_count;) | |
0 | 512 private: |
513 // Reset this Arena to empty, access will trigger grow if necessary | |
514 void reset(void) { | |
515 _first = _chunk = NULL; | |
516 _hwm = _max = NULL; | |
6197 | 517 set_size_in_bytes(0); |
0 | 518 } |
519 }; | |
520 | |
521 // One of the following macros must be used when allocating | |
522 // an array or object from an arena | |
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523 #define NEW_ARENA_ARRAY(arena, type, size) \ |
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524 (type*) (arena)->Amalloc((size) * sizeof(type)) |
0 | 525 |
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526 #define REALLOC_ARENA_ARRAY(arena, type, old, old_size, new_size) \ |
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527 (type*) (arena)->Arealloc((char*)(old), (old_size) * sizeof(type), \ |
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528 (new_size) * sizeof(type) ) |
0 | 529 |
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530 #define FREE_ARENA_ARRAY(arena, type, old, size) \ |
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531 (arena)->Afree((char*)(old), (size) * sizeof(type)) |
0 | 532 |
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533 #define NEW_ARENA_OBJ(arena, type) \ |
0 | 534 NEW_ARENA_ARRAY(arena, type, 1) |
535 | |
536 | |
537 //%note allocation_1 | |
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538 extern char* resource_allocate_bytes(size_t size, |
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539 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
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540 extern char* resource_allocate_bytes(Thread* thread, size_t size, |
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541 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
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542 extern char* resource_reallocate_bytes( char *old, size_t old_size, size_t new_size, |
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543 AllocFailType alloc_failmode = AllocFailStrategy::EXIT_OOM); |
0 | 544 extern void resource_free_bytes( char *old, size_t size ); |
545 | |
546 //---------------------------------------------------------------------- | |
547 // Base class for objects allocated in the resource area per default. | |
548 // Optionally, objects may be allocated on the C heap with | |
549 // new(ResourceObj::C_HEAP) Foo(...) or in an Arena with new (&arena) | |
550 // ResourceObj's can be allocated within other objects, but don't use | |
551 // new or delete (allocation_type is unknown). If new is used to allocate, | |
552 // use delete to deallocate. | |
553 class ResourceObj ALLOCATION_SUPER_CLASS_SPEC { | |
554 public: | |
1685 | 555 enum allocation_type { STACK_OR_EMBEDDED = 0, RESOURCE_AREA, C_HEAP, ARENA, allocation_mask = 0x3 }; |
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556 static void set_allocation_type(address res, allocation_type type) NOT_DEBUG_RETURN; |
0 | 557 #ifdef ASSERT |
558 private: | |
1685 | 559 // When this object is allocated on stack the new() operator is not |
560 // called but garbage on stack may look like a valid allocation_type. | |
561 // Store negated 'this' pointer when new() is called to distinguish cases. | |
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562 // Use second array's element for verification value to distinguish garbage. |
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563 uintptr_t _allocation_t[2]; |
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564 bool is_type_set() const; |
0 | 565 public: |
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566 allocation_type get_allocation_type() const; |
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567 bool allocated_on_stack() const { return get_allocation_type() == STACK_OR_EMBEDDED; } |
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568 bool allocated_on_res_area() const { return get_allocation_type() == RESOURCE_AREA; } |
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569 bool allocated_on_C_heap() const { return get_allocation_type() == C_HEAP; } |
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570 bool allocated_on_arena() const { return get_allocation_type() == ARENA; } |
1685 | 571 ResourceObj(); // default construtor |
572 ResourceObj(const ResourceObj& r); // default copy construtor | |
573 ResourceObj& operator=(const ResourceObj& r); // default copy assignment | |
574 ~ResourceObj(); | |
0 | 575 #endif // ASSERT |
576 | |
577 public: | |
6197 | 578 void* operator new(size_t size, allocation_type type, MEMFLAGS flags); |
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579 void* operator new [](size_t size, allocation_type type, MEMFLAGS flags); |
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580 void* operator new(size_t size, const std::nothrow_t& nothrow_constant, |
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581 allocation_type type, MEMFLAGS flags); |
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582 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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583 allocation_type type, MEMFLAGS flags); |
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584 |
0 | 585 void* operator new(size_t size, Arena *arena) { |
586 address res = (address)arena->Amalloc(size); | |
1685 | 587 DEBUG_ONLY(set_allocation_type(res, ARENA);) |
0 | 588 return res; |
589 } | |
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590 |
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591 void* operator new [](size_t size, Arena *arena) { |
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592 address res = (address)arena->Amalloc(size); |
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593 DEBUG_ONLY(set_allocation_type(res, ARENA);) |
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594 return res; |
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595 } |
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596 |
0 | 597 void* operator new(size_t size) { |
598 address res = (address)resource_allocate_bytes(size); | |
1685 | 599 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) |
0 | 600 return res; |
601 } | |
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602 |
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603 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) { |
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604 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); |
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605 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) |
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606 return res; |
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607 } |
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608 |
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609 void* operator new [](size_t size) { |
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610 address res = (address)resource_allocate_bytes(size); |
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611 DEBUG_ONLY(set_allocation_type(res, RESOURCE_AREA);) |
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612 return res; |
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613 } |
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614 |
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615 void* operator new [](size_t size, const std::nothrow_t& nothrow_constant) { |
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616 address res = (address)resource_allocate_bytes(size, AllocFailStrategy::RETURN_NULL); |
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617 DEBUG_ONLY(if (res != NULL) set_allocation_type(res, RESOURCE_AREA);) |
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618 return res; |
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619 } |
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620 |
0 | 621 void operator delete(void* p); |
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622 void operator delete [](void* p); |
0 | 623 }; |
624 | |
625 // One of the following macros must be used when allocating an array | |
626 // or object to determine whether it should reside in the C heap on in | |
627 // the resource area. | |
628 | |
629 #define NEW_RESOURCE_ARRAY(type, size)\ | |
630 (type*) resource_allocate_bytes((size) * sizeof(type)) | |
631 | |
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632 #define NEW_RESOURCE_ARRAY_RETURN_NULL(type, size)\ |
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633 (type*) resource_allocate_bytes((size) * sizeof(type), AllocFailStrategy::RETURN_NULL) |
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634 |
0 | 635 #define NEW_RESOURCE_ARRAY_IN_THREAD(thread, type, size)\ |
636 (type*) resource_allocate_bytes(thread, (size) * sizeof(type)) | |
637 | |
638 #define REALLOC_RESOURCE_ARRAY(type, old, old_size, new_size)\ | |
639 (type*) resource_reallocate_bytes((char*)(old), (old_size) * sizeof(type), (new_size) * sizeof(type) ) | |
640 | |
641 #define FREE_RESOURCE_ARRAY(type, old, size)\ | |
642 resource_free_bytes((char*)(old), (size) * sizeof(type)) | |
643 | |
644 #define FREE_FAST(old)\ | |
645 /* nop */ | |
646 | |
647 #define NEW_RESOURCE_OBJ(type)\ | |
648 NEW_RESOURCE_ARRAY(type, 1) | |
649 | |
6197 | 650 #define NEW_C_HEAP_ARRAY(type, size, memflags)\ |
651 (type*) (AllocateHeap((size) * sizeof(type), memflags)) | |
0 | 652 |
6197 | 653 #define REALLOC_C_HEAP_ARRAY(type, old, size, memflags)\ |
654 (type*) (ReallocateHeap((char*)old, (size) * sizeof(type), memflags)) | |
655 | |
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656 #define FREE_C_HEAP_ARRAY(type, old, memflags) \ |
6197 | 657 FreeHeap((char*)(old), memflags) |
0 | 658 |
6197 | 659 #define NEW_C_HEAP_ARRAY2(type, size, memflags, pc)\ |
660 (type*) (AllocateHeap((size) * sizeof(type), memflags, pc)) | |
0 | 661 |
6197 | 662 #define REALLOC_C_HEAP_ARRAY2(type, old, size, memflags, pc)\ |
663 (type*) (ReallocateHeap((char*)old, (size) * sizeof(type), memflags, pc)) | |
664 | |
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665 #define NEW_C_HEAP_ARRAY3(type, size, memflags, pc, allocfail) \ |
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666 (type*) AllocateHeap(size * sizeof(type), memflags, pc, allocfail) |
6197 | 667 |
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668 // allocate type in heap without calling ctor |
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669 #define NEW_C_HEAP_OBJ(type, memflags)\ |
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670 NEW_C_HEAP_ARRAY(type, 1, memflags) |
0 | 671 |
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672 // deallocate obj of type in heap without calling dtor |
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673 #define FREE_C_HEAP_OBJ(objname, memflags)\ |
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674 FreeHeap((char*)objname, memflags); |
0 | 675 |
676 // for statistics | |
677 #ifndef PRODUCT | |
678 class AllocStats : StackObj { | |
2250 | 679 julong start_mallocs, start_frees; |
680 julong start_malloc_bytes, start_mfree_bytes, start_res_bytes; | |
0 | 681 public: |
682 AllocStats(); | |
683 | |
2250 | 684 julong num_mallocs(); // since creation of receiver |
685 julong alloc_bytes(); | |
686 julong num_frees(); | |
687 julong free_bytes(); | |
688 julong resource_bytes(); | |
0 | 689 void print(); |
690 }; | |
691 #endif | |
692 | |
693 | |
694 //------------------------------ReallocMark--------------------------------- | |
695 // Code which uses REALLOC_RESOURCE_ARRAY should check an associated | |
696 // ReallocMark, which is declared in the same scope as the reallocated | |
697 // pointer. Any operation that could __potentially__ cause a reallocation | |
698 // should check the ReallocMark. | |
699 class ReallocMark: public StackObj { | |
700 protected: | |
701 NOT_PRODUCT(int _nesting;) | |
702 | |
703 public: | |
704 ReallocMark() PRODUCT_RETURN; | |
705 void check() PRODUCT_RETURN; | |
706 }; | |
1972 | 707 |
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708 // Helper class to allocate arrays that may become large. |
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709 // Uses the OS malloc for allocations smaller than ArrayAllocatorMallocLimit |
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710 // and uses mapped memory for larger allocations. |
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711 // Most OS mallocs do something similar but Solaris malloc does not revert |
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712 // to mapped memory for large allocations. By default ArrayAllocatorMallocLimit |
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713 // is set so that we always use malloc except for Solaris where we set the |
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714 // limit to get mapped memory. |
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715 template <class E, MEMFLAGS F> |
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716 class ArrayAllocator : StackObj { |
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717 char* _addr; |
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718 bool _use_malloc; |
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719 size_t _size; |
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720 public: |
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721 ArrayAllocator() : _addr(NULL), _use_malloc(false), _size(0) { } |
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722 ~ArrayAllocator() { free(); } |
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723 E* allocate(size_t length); |
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724 void free(); |
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725 }; |
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726 |
1972 | 727 #endif // SHARE_VM_MEMORY_ALLOCATION_HPP |