Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/allocation.cpp @ 14422:2b8e28fdf503
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author | kvn |
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date | Tue, 05 Nov 2013 17:38:04 -0800 |
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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 #include "precompiled.hpp" |
26 #include "memory/allocation.hpp" | |
27 #include "memory/allocation.inline.hpp" | |
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28 #include "memory/genCollectedHeap.hpp" |
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29 #include "memory/metaspaceShared.hpp" |
1972 | 30 #include "memory/resourceArea.hpp" |
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31 #include "memory/universe.hpp" |
6197 | 32 #include "runtime/atomic.hpp" |
1972 | 33 #include "runtime/os.hpp" |
34 #include "runtime/task.hpp" | |
35 #include "runtime/threadCritical.hpp" | |
6197 | 36 #include "services/memTracker.hpp" |
1972 | 37 #include "utilities/ostream.hpp" |
6197 | 38 |
1972 | 39 #ifdef TARGET_OS_FAMILY_linux |
40 # include "os_linux.inline.hpp" | |
41 #endif | |
42 #ifdef TARGET_OS_FAMILY_solaris | |
43 # include "os_solaris.inline.hpp" | |
44 #endif | |
45 #ifdef TARGET_OS_FAMILY_windows | |
46 # include "os_windows.inline.hpp" | |
47 #endif | |
14411 | 48 #ifdef TARGET_OS_FAMILY_aix |
49 # include "os_aix.inline.hpp" | |
50 #endif | |
3960 | 51 #ifdef TARGET_OS_FAMILY_bsd |
52 # include "os_bsd.inline.hpp" | |
53 #endif | |
0 | 54 |
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55 void* StackObj::operator new(size_t size) throw() { ShouldNotCallThis(); return 0; } |
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56 void StackObj::operator delete(void* p) { ShouldNotCallThis(); } |
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57 void* StackObj::operator new [](size_t size) throw() { ShouldNotCallThis(); return 0; } |
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58 void StackObj::operator delete [](void* p) { ShouldNotCallThis(); } |
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59 |
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60 void* _ValueObj::operator new(size_t size) throw() { ShouldNotCallThis(); return 0; } |
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61 void _ValueObj::operator delete(void* p) { ShouldNotCallThis(); } |
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62 void* _ValueObj::operator new [](size_t size) throw() { ShouldNotCallThis(); return 0; } |
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63 void _ValueObj::operator delete [](void* p) { ShouldNotCallThis(); } |
0 | 64 |
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65 void* MetaspaceObj::operator new(size_t size, ClassLoaderData* loader_data, |
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66 size_t word_size, bool read_only, |
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67 MetaspaceObj::Type type, TRAPS) throw() { |
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68 // Klass has it's own operator new |
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69 return Metaspace::allocate(loader_data, word_size, read_only, |
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70 type, CHECK_NULL); |
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71 } |
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72 |
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73 bool MetaspaceObj::is_shared() const { |
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74 return MetaspaceShared::is_in_shared_space(this); |
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75 } |
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76 |
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77 |
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78 bool MetaspaceObj::is_metaspace_object() const { |
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79 return Metaspace::contains((void*)this); |
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80 } |
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81 |
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82 void MetaspaceObj::print_address_on(outputStream* st) const { |
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83 st->print(" {"INTPTR_FORMAT"}", this); |
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84 } |
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85 |
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86 void* ResourceObj::operator new(size_t size, allocation_type type, MEMFLAGS flags) throw() { |
0 | 87 address res; |
88 switch (type) { | |
89 case C_HEAP: | |
6197 | 90 res = (address)AllocateHeap(size, flags, CALLER_PC); |
1685 | 91 DEBUG_ONLY(set_allocation_type(res, C_HEAP);) |
0 | 92 break; |
93 case RESOURCE_AREA: | |
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94 // new(size) sets allocation type RESOURCE_AREA. |
0 | 95 res = (address)operator new(size); |
96 break; | |
97 default: | |
98 ShouldNotReachHere(); | |
99 } | |
100 return res; | |
101 } | |
102 | |
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103 void* ResourceObj::operator new [](size_t size, allocation_type type, MEMFLAGS flags) throw() { |
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104 return (address) operator new(size, type, flags); |
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105 } |
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106 |
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107 void* ResourceObj::operator new(size_t size, const std::nothrow_t& nothrow_constant, |
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108 allocation_type type, MEMFLAGS flags) throw() { |
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109 //should only call this with std::nothrow, use other operator new() otherwise |
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110 address res; |
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111 switch (type) { |
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112 case C_HEAP: |
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113 res = (address)AllocateHeap(size, flags, CALLER_PC, AllocFailStrategy::RETURN_NULL); |
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114 DEBUG_ONLY(if (res!= NULL) set_allocation_type(res, C_HEAP);) |
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115 break; |
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116 case RESOURCE_AREA: |
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117 // new(size) sets allocation type RESOURCE_AREA. |
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118 res = (address)operator new(size, std::nothrow); |
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119 break; |
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120 default: |
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121 ShouldNotReachHere(); |
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122 } |
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123 return res; |
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124 } |
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125 |
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126 void* ResourceObj::operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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127 allocation_type type, MEMFLAGS flags) throw() { |
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128 return (address)operator new(size, nothrow_constant, type, flags); |
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129 } |
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130 |
0 | 131 void ResourceObj::operator delete(void* p) { |
132 assert(((ResourceObj *)p)->allocated_on_C_heap(), | |
133 "delete only allowed for C_HEAP objects"); | |
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134 DEBUG_ONLY(((ResourceObj *)p)->_allocation_t[0] = (uintptr_t)badHeapOopVal;) |
0 | 135 FreeHeap(p); |
136 } | |
137 | |
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138 void ResourceObj::operator delete [](void* p) { |
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139 operator delete(p); |
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140 } |
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141 |
1685 | 142 #ifdef ASSERT |
143 void ResourceObj::set_allocation_type(address res, allocation_type type) { | |
144 // Set allocation type in the resource object | |
145 uintptr_t allocation = (uintptr_t)res; | |
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146 assert((allocation & allocation_mask) == 0, "address should be aligned to 4 bytes at least"); |
1685 | 147 assert(type <= allocation_mask, "incorrect allocation type"); |
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148 ResourceObj* resobj = (ResourceObj *)res; |
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149 resobj->_allocation_t[0] = ~(allocation + type); |
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150 if (type != STACK_OR_EMBEDDED) { |
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151 // Called from operator new() and CollectionSetChooser(), |
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152 // set verification value. |
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153 resobj->_allocation_t[1] = (uintptr_t)&(resobj->_allocation_t[1]) + type; |
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154 } |
1685 | 155 } |
156 | |
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157 ResourceObj::allocation_type ResourceObj::get_allocation_type() const { |
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158 assert(~(_allocation_t[0] | allocation_mask) == (uintptr_t)this, "lost resource object"); |
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159 return (allocation_type)((~_allocation_t[0]) & allocation_mask); |
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160 } |
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161 |
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162 bool ResourceObj::is_type_set() const { |
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163 allocation_type type = (allocation_type)(_allocation_t[1] & allocation_mask); |
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164 return get_allocation_type() == type && |
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165 (_allocation_t[1] - type) == (uintptr_t)(&_allocation_t[1]); |
1685 | 166 } |
167 | |
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168 ResourceObj::ResourceObj() { // default constructor |
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169 if (~(_allocation_t[0] | allocation_mask) != (uintptr_t)this) { |
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170 // Operator new() is not called for allocations |
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171 // on stack and for embedded objects. |
1685 | 172 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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173 } else if (allocated_on_stack()) { // STACK_OR_EMBEDDED |
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174 // For some reason we got a value which resembles |
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175 // an embedded or stack object (operator new() does not |
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176 // set such type). Keep it since it is valid value |
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177 // (even if it was garbage). |
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178 // Ignore garbage in other fields. |
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179 } else if (is_type_set()) { |
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180 // Operator new() was called and type was set. |
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181 assert(!allocated_on_stack(), |
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182 err_msg("not embedded or stack, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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183 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
1685 | 184 } else { |
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185 // Operator new() was not called. |
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186 // Assume that it is embedded or stack object. |
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187 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
1685 | 188 } |
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189 _allocation_t[1] = 0; // Zap verification value |
1685 | 190 } |
191 | |
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192 ResourceObj::ResourceObj(const ResourceObj& r) { // default copy constructor |
1685 | 193 // Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream. |
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194 // Note: garbage may resembles valid value. |
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195 assert(~(_allocation_t[0] | allocation_mask) != (uintptr_t)this || !is_type_set(), |
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196 err_msg("embedded or stack only, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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197 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
1685 | 198 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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199 _allocation_t[1] = 0; // Zap verification value |
1685 | 200 } |
201 | |
202 ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment | |
203 // Used in InlineTree::ok_to_inline() for WarmCallInfo. | |
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204 assert(allocated_on_stack(), |
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205 err_msg("copy only into local, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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206 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
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207 // Keep current _allocation_t value; |
1685 | 208 return *this; |
209 } | |
210 | |
211 ResourceObj::~ResourceObj() { | |
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212 // allocated_on_C_heap() also checks that encoded (in _allocation) address == this. |
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213 if (!allocated_on_C_heap()) { // ResourceObj::delete() will zap _allocation for C_heap. |
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214 _allocation_t[0] = (uintptr_t)badHeapOopVal; // zap type |
1685 | 215 } |
216 } | |
217 #endif // ASSERT | |
218 | |
219 | |
0 | 220 void trace_heap_malloc(size_t size, const char* name, void* p) { |
221 // A lock is not needed here - tty uses a lock internally | |
2250 | 222 tty->print_cr("Heap malloc " INTPTR_FORMAT " " SIZE_FORMAT " %s", p, size, name == NULL ? "" : name); |
0 | 223 } |
224 | |
225 | |
226 void trace_heap_free(void* p) { | |
227 // A lock is not needed here - tty uses a lock internally | |
228 tty->print_cr("Heap free " INTPTR_FORMAT, p); | |
229 } | |
230 | |
231 //-------------------------------------------------------------------------------------- | |
232 // ChunkPool implementation | |
233 | |
234 // MT-safe pool of chunks to reduce malloc/free thrashing | |
235 // NB: not using Mutex because pools are used before Threads are initialized | |
6197 | 236 class ChunkPool: public CHeapObj<mtInternal> { |
0 | 237 Chunk* _first; // first cached Chunk; its first word points to next chunk |
238 size_t _num_chunks; // number of unused chunks in pool | |
239 size_t _num_used; // number of chunks currently checked out | |
240 const size_t _size; // size of each chunk (must be uniform) | |
241 | |
11095 | 242 // Our four static pools |
0 | 243 static ChunkPool* _large_pool; |
244 static ChunkPool* _medium_pool; | |
245 static ChunkPool* _small_pool; | |
11095 | 246 static ChunkPool* _tiny_pool; |
0 | 247 |
248 // return first element or null | |
249 void* get_first() { | |
250 Chunk* c = _first; | |
251 if (_first) { | |
252 _first = _first->next(); | |
253 _num_chunks--; | |
254 } | |
255 return c; | |
256 } | |
257 | |
258 public: | |
259 // All chunks in a ChunkPool has the same size | |
260 ChunkPool(size_t size) : _size(size) { _first = NULL; _num_chunks = _num_used = 0; } | |
261 | |
262 // Allocate a new chunk from the pool (might expand the pool) | |
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263 _NOINLINE_ void* allocate(size_t bytes, AllocFailType alloc_failmode) { |
0 | 264 assert(bytes == _size, "bad size"); |
265 void* p = NULL; | |
6197 | 266 // No VM lock can be taken inside ThreadCritical lock, so os::malloc |
267 // should be done outside ThreadCritical lock due to NMT | |
0 | 268 { ThreadCritical tc; |
269 _num_used++; | |
270 p = get_first(); | |
271 } | |
6197 | 272 if (p == NULL) p = os::malloc(bytes, mtChunk, CURRENT_PC); |
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273 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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274 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "ChunkPool::allocate"); |
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275 } |
0 | 276 return p; |
277 } | |
278 | |
279 // Return a chunk to the pool | |
280 void free(Chunk* chunk) { | |
281 assert(chunk->length() + Chunk::aligned_overhead_size() == _size, "bad size"); | |
282 ThreadCritical tc; | |
283 _num_used--; | |
284 | |
285 // Add chunk to list | |
286 chunk->set_next(_first); | |
287 _first = chunk; | |
288 _num_chunks++; | |
289 } | |
290 | |
291 // Prune the pool | |
292 void free_all_but(size_t n) { | |
6197 | 293 Chunk* cur = NULL; |
294 Chunk* next; | |
295 { | |
0 | 296 // if we have more than n chunks, free all of them |
297 ThreadCritical tc; | |
298 if (_num_chunks > n) { | |
299 // free chunks at end of queue, for better locality | |
6197 | 300 cur = _first; |
0 | 301 for (size_t i = 0; i < (n - 1) && cur != NULL; i++) cur = cur->next(); |
302 | |
303 if (cur != NULL) { | |
6197 | 304 next = cur->next(); |
0 | 305 cur->set_next(NULL); |
306 cur = next; | |
307 | |
6197 | 308 _num_chunks = n; |
309 } | |
310 } | |
311 } | |
312 | |
313 // Free all remaining chunks, outside of ThreadCritical | |
314 // to avoid deadlock with NMT | |
0 | 315 while(cur != NULL) { |
316 next = cur->next(); | |
6197 | 317 os::free(cur, mtChunk); |
0 | 318 cur = next; |
319 } | |
320 } | |
321 | |
322 // Accessors to preallocated pool's | |
323 static ChunkPool* large_pool() { assert(_large_pool != NULL, "must be initialized"); return _large_pool; } | |
324 static ChunkPool* medium_pool() { assert(_medium_pool != NULL, "must be initialized"); return _medium_pool; } | |
325 static ChunkPool* small_pool() { assert(_small_pool != NULL, "must be initialized"); return _small_pool; } | |
11095 | 326 static ChunkPool* tiny_pool() { assert(_tiny_pool != NULL, "must be initialized"); return _tiny_pool; } |
0 | 327 |
328 static void initialize() { | |
329 _large_pool = new ChunkPool(Chunk::size + Chunk::aligned_overhead_size()); | |
330 _medium_pool = new ChunkPool(Chunk::medium_size + Chunk::aligned_overhead_size()); | |
331 _small_pool = new ChunkPool(Chunk::init_size + Chunk::aligned_overhead_size()); | |
11095 | 332 _tiny_pool = new ChunkPool(Chunk::tiny_size + Chunk::aligned_overhead_size()); |
0 | 333 } |
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334 |
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335 static void clean() { |
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336 enum { BlocksToKeep = 5 }; |
11095 | 337 _tiny_pool->free_all_but(BlocksToKeep); |
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338 _small_pool->free_all_but(BlocksToKeep); |
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339 _medium_pool->free_all_but(BlocksToKeep); |
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340 _large_pool->free_all_but(BlocksToKeep); |
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341 } |
0 | 342 }; |
343 | |
344 ChunkPool* ChunkPool::_large_pool = NULL; | |
345 ChunkPool* ChunkPool::_medium_pool = NULL; | |
346 ChunkPool* ChunkPool::_small_pool = NULL; | |
11095 | 347 ChunkPool* ChunkPool::_tiny_pool = NULL; |
0 | 348 |
349 void chunkpool_init() { | |
350 ChunkPool::initialize(); | |
351 } | |
352 | |
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353 void |
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354 Chunk::clean_chunk_pool() { |
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355 ChunkPool::clean(); |
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356 } |
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357 |
0 | 358 |
359 //-------------------------------------------------------------------------------------- | |
360 // ChunkPoolCleaner implementation | |
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361 // |
0 | 362 |
363 class ChunkPoolCleaner : public PeriodicTask { | |
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364 enum { CleaningInterval = 5000 }; // cleaning interval in ms |
0 | 365 |
366 public: | |
367 ChunkPoolCleaner() : PeriodicTask(CleaningInterval) {} | |
368 void task() { | |
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369 ChunkPool::clean(); |
0 | 370 } |
371 }; | |
372 | |
373 //-------------------------------------------------------------------------------------- | |
374 // Chunk implementation | |
375 | |
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376 void* Chunk::operator new (size_t requested_size, AllocFailType alloc_failmode, size_t length) throw() { |
0 | 377 // requested_size is equal to sizeof(Chunk) but in order for the arena |
378 // allocations to come out aligned as expected the size must be aligned | |
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379 // to expected arena alignment. |
0 | 380 // expect requested_size but if sizeof(Chunk) doesn't match isn't proper size we must align it. |
381 assert(ARENA_ALIGN(requested_size) == aligned_overhead_size(), "Bad alignment"); | |
382 size_t bytes = ARENA_ALIGN(requested_size) + length; | |
383 switch (length) { | |
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384 case Chunk::size: return ChunkPool::large_pool()->allocate(bytes, alloc_failmode); |
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385 case Chunk::medium_size: return ChunkPool::medium_pool()->allocate(bytes, alloc_failmode); |
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386 case Chunk::init_size: return ChunkPool::small_pool()->allocate(bytes, alloc_failmode); |
11095 | 387 case Chunk::tiny_size: return ChunkPool::tiny_pool()->allocate(bytes, alloc_failmode); |
0 | 388 default: { |
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389 void* p = os::malloc(bytes, mtChunk, CALLER_PC); |
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390 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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391 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "Chunk::new"); |
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392 } |
0 | 393 return p; |
394 } | |
395 } | |
396 } | |
397 | |
398 void Chunk::operator delete(void* p) { | |
399 Chunk* c = (Chunk*)p; | |
400 switch (c->length()) { | |
401 case Chunk::size: ChunkPool::large_pool()->free(c); break; | |
402 case Chunk::medium_size: ChunkPool::medium_pool()->free(c); break; | |
403 case Chunk::init_size: ChunkPool::small_pool()->free(c); break; | |
11095 | 404 case Chunk::tiny_size: ChunkPool::tiny_pool()->free(c); break; |
6197 | 405 default: os::free(c, mtChunk); |
0 | 406 } |
407 } | |
408 | |
409 Chunk::Chunk(size_t length) : _len(length) { | |
410 _next = NULL; // Chain on the linked list | |
411 } | |
412 | |
413 | |
414 void Chunk::chop() { | |
415 Chunk *k = this; | |
416 while( k ) { | |
417 Chunk *tmp = k->next(); | |
418 // clear out this chunk (to detect allocation bugs) | |
419 if (ZapResourceArea) memset(k->bottom(), badResourceValue, k->length()); | |
420 delete k; // Free chunk (was malloc'd) | |
421 k = tmp; | |
422 } | |
423 } | |
424 | |
425 void Chunk::next_chop() { | |
426 _next->chop(); | |
427 _next = NULL; | |
428 } | |
429 | |
430 | |
431 void Chunk::start_chunk_pool_cleaner_task() { | |
432 #ifdef ASSERT | |
433 static bool task_created = false; | |
434 assert(!task_created, "should not start chuck pool cleaner twice"); | |
435 task_created = true; | |
436 #endif | |
437 ChunkPoolCleaner* cleaner = new ChunkPoolCleaner(); | |
438 cleaner->enroll(); | |
439 } | |
440 | |
441 //------------------------------Arena------------------------------------------ | |
6197 | 442 NOT_PRODUCT(volatile jint Arena::_instance_count = 0;) |
0 | 443 |
444 Arena::Arena(size_t init_size) { | |
445 size_t round_size = (sizeof (char *)) - 1; | |
446 init_size = (init_size+round_size) & ~round_size; | |
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447 _first = _chunk = new (AllocFailStrategy::EXIT_OOM, init_size) Chunk(init_size); |
0 | 448 _hwm = _chunk->bottom(); // Save the cached hwm, max |
449 _max = _chunk->top(); | |
450 set_size_in_bytes(init_size); | |
6197 | 451 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
0 | 452 } |
453 | |
454 Arena::Arena() { | |
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455 _first = _chunk = new (AllocFailStrategy::EXIT_OOM, Chunk::init_size) Chunk(Chunk::init_size); |
0 | 456 _hwm = _chunk->bottom(); // Save the cached hwm, max |
457 _max = _chunk->top(); | |
458 set_size_in_bytes(Chunk::init_size); | |
6197 | 459 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
0 | 460 } |
461 | |
462 Arena *Arena::move_contents(Arena *copy) { | |
463 copy->destruct_contents(); | |
464 copy->_chunk = _chunk; | |
465 copy->_hwm = _hwm; | |
466 copy->_max = _max; | |
467 copy->_first = _first; | |
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468 |
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469 // workaround rare racing condition, which could double count |
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470 // the arena size by native memory tracking |
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471 size_t size = size_in_bytes(); |
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472 set_size_in_bytes(0); |
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473 copy->set_size_in_bytes(size); |
0 | 474 // Destroy original arena |
475 reset(); | |
476 return copy; // Return Arena with contents | |
477 } | |
478 | |
479 Arena::~Arena() { | |
480 destruct_contents(); | |
6197 | 481 NOT_PRODUCT(Atomic::dec(&_instance_count);) |
482 } | |
483 | |
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484 void* Arena::operator new(size_t size) throw() { |
6197 | 485 assert(false, "Use dynamic memory type binding"); |
486 return NULL; | |
487 } | |
488 | |
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489 void* Arena::operator new (size_t size, const std::nothrow_t& nothrow_constant) throw() { |
6197 | 490 assert(false, "Use dynamic memory type binding"); |
491 return NULL; | |
492 } | |
493 | |
494 // dynamic memory type binding | |
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495 void* Arena::operator new(size_t size, MEMFLAGS flags) throw() { |
6197 | 496 #ifdef ASSERT |
497 void* p = (void*)AllocateHeap(size, flags|otArena, CALLER_PC); | |
498 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); | |
499 return p; | |
500 #else | |
501 return (void *) AllocateHeap(size, flags|otArena, CALLER_PC); | |
502 #endif | |
503 } | |
504 | |
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505 void* Arena::operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags) throw() { |
6197 | 506 #ifdef ASSERT |
507 void* p = os::malloc(size, flags|otArena, CALLER_PC); | |
508 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); | |
509 return p; | |
510 #else | |
511 return os::malloc(size, flags|otArena, CALLER_PC); | |
512 #endif | |
513 } | |
514 | |
515 void Arena::operator delete(void* p) { | |
516 FreeHeap(p); | |
0 | 517 } |
518 | |
519 // Destroy this arenas contents and reset to empty | |
520 void Arena::destruct_contents() { | |
521 if (UseMallocOnly && _first != NULL) { | |
522 char* end = _first->next() ? _first->top() : _hwm; | |
523 free_malloced_objects(_first, _first->bottom(), end, _hwm); | |
524 } | |
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525 // reset size before chop to avoid a rare racing condition |
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526 // that can have total arena memory exceed total chunk memory |
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527 set_size_in_bytes(0); |
0 | 528 _first->chop(); |
529 reset(); | |
530 } | |
531 | |
6197 | 532 // This is high traffic method, but many calls actually don't |
533 // change the size | |
534 void Arena::set_size_in_bytes(size_t size) { | |
535 if (_size_in_bytes != size) { | |
536 _size_in_bytes = size; | |
537 MemTracker::record_arena_size((address)this, size); | |
538 } | |
539 } | |
0 | 540 |
541 // Total of all Chunks in arena | |
542 size_t Arena::used() const { | |
543 size_t sum = _chunk->length() - (_max-_hwm); // Size leftover in this Chunk | |
544 register Chunk *k = _first; | |
545 while( k != _chunk) { // Whilst have Chunks in a row | |
546 sum += k->length(); // Total size of this Chunk | |
547 k = k->next(); // Bump along to next Chunk | |
548 } | |
549 return sum; // Return total consumed space. | |
550 } | |
551 | |
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552 void Arena::signal_out_of_memory(size_t sz, const char* whence) const { |
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553 vm_exit_out_of_memory(sz, OOM_MALLOC_ERROR, whence); |
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554 } |
0 | 555 |
556 // Grow a new Chunk | |
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557 void* Arena::grow(size_t x, AllocFailType alloc_failmode) { |
0 | 558 // Get minimal required size. Either real big, or even bigger for giant objs |
559 size_t len = MAX2(x, (size_t) Chunk::size); | |
560 | |
561 Chunk *k = _chunk; // Get filled-up chunk address | |
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562 _chunk = new (alloc_failmode, len) Chunk(len); |
0 | 563 |
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564 if (_chunk == NULL) { |
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565 return NULL; |
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566 } |
0 | 567 if (k) k->set_next(_chunk); // Append new chunk to end of linked list |
568 else _first = _chunk; | |
569 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
570 _max = _chunk->top(); | |
571 set_size_in_bytes(size_in_bytes() + len); | |
572 void* result = _hwm; | |
573 _hwm += x; | |
574 return result; | |
575 } | |
576 | |
577 | |
578 | |
579 // Reallocate storage in Arena. | |
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580 void *Arena::Arealloc(void* old_ptr, size_t old_size, size_t new_size, AllocFailType alloc_failmode) { |
0 | 581 assert(new_size >= 0, "bad size"); |
582 if (new_size == 0) return NULL; | |
583 #ifdef ASSERT | |
584 if (UseMallocOnly) { | |
585 // always allocate a new object (otherwise we'll free this one twice) | |
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586 char* copy = (char*)Amalloc(new_size, alloc_failmode); |
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587 if (copy == NULL) { |
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588 return NULL; |
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589 } |
0 | 590 size_t n = MIN2(old_size, new_size); |
591 if (n > 0) memcpy(copy, old_ptr, n); | |
592 Afree(old_ptr,old_size); // Mostly done to keep stats accurate | |
593 return copy; | |
594 } | |
595 #endif | |
596 char *c_old = (char*)old_ptr; // Handy name | |
597 // Stupid fast special case | |
598 if( new_size <= old_size ) { // Shrink in-place | |
599 if( c_old+old_size == _hwm) // Attempt to free the excess bytes | |
600 _hwm = c_old+new_size; // Adjust hwm | |
601 return c_old; | |
602 } | |
603 | |
604 // make sure that new_size is legal | |
605 size_t corrected_new_size = ARENA_ALIGN(new_size); | |
606 | |
607 // See if we can resize in-place | |
608 if( (c_old+old_size == _hwm) && // Adjusting recent thing | |
609 (c_old+corrected_new_size <= _max) ) { // Still fits where it sits | |
610 _hwm = c_old+corrected_new_size; // Adjust hwm | |
611 return c_old; // Return old pointer | |
612 } | |
613 | |
614 // Oops, got to relocate guts | |
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615 void *new_ptr = Amalloc(new_size, alloc_failmode); |
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616 if (new_ptr == NULL) { |
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617 return NULL; |
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618 } |
0 | 619 memcpy( new_ptr, c_old, old_size ); |
620 Afree(c_old,old_size); // Mostly done to keep stats accurate | |
621 return new_ptr; | |
622 } | |
623 | |
624 | |
625 // Determine if pointer belongs to this Arena or not. | |
626 bool Arena::contains( const void *ptr ) const { | |
627 #ifdef ASSERT | |
628 if (UseMallocOnly) { | |
629 // really slow, but not easy to make fast | |
630 if (_chunk == NULL) return false; | |
631 char** bottom = (char**)_chunk->bottom(); | |
632 for (char** p = (char**)_hwm - 1; p >= bottom; p--) { | |
633 if (*p == ptr) return true; | |
634 } | |
635 for (Chunk *c = _first; c != NULL; c = c->next()) { | |
636 if (c == _chunk) continue; // current chunk has been processed | |
637 char** bottom = (char**)c->bottom(); | |
638 for (char** p = (char**)c->top() - 1; p >= bottom; p--) { | |
639 if (*p == ptr) return true; | |
640 } | |
641 } | |
642 return false; | |
643 } | |
644 #endif | |
645 if( (void*)_chunk->bottom() <= ptr && ptr < (void*)_hwm ) | |
646 return true; // Check for in this chunk | |
647 for (Chunk *c = _first; c; c = c->next()) { | |
648 if (c == _chunk) continue; // current chunk has been processed | |
649 if ((void*)c->bottom() <= ptr && ptr < (void*)c->top()) { | |
650 return true; // Check for every chunk in Arena | |
651 } | |
652 } | |
653 return false; // Not in any Chunk, so not in Arena | |
654 } | |
655 | |
656 | |
657 #ifdef ASSERT | |
658 void* Arena::malloc(size_t size) { | |
659 assert(UseMallocOnly, "shouldn't call"); | |
660 // use malloc, but save pointer in res. area for later freeing | |
661 char** save = (char**)internal_malloc_4(sizeof(char*)); | |
6197 | 662 return (*save = (char*)os::malloc(size, mtChunk)); |
0 | 663 } |
664 | |
665 // for debugging with UseMallocOnly | |
666 void* Arena::internal_malloc_4(size_t x) { | |
667 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); | |
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668 check_for_overflow(x, "Arena::internal_malloc_4"); |
0 | 669 if (_hwm + x > _max) { |
670 return grow(x); | |
671 } else { | |
672 char *old = _hwm; | |
673 _hwm += x; | |
674 return old; | |
675 } | |
676 } | |
677 #endif | |
678 | |
679 | |
680 //-------------------------------------------------------------------------------------- | |
681 // Non-product code | |
682 | |
683 #ifndef PRODUCT | |
684 // The global operator new should never be called since it will usually indicate | |
685 // a memory leak. Use CHeapObj as the base class of such objects to make it explicit | |
686 // that they're allocated on the C heap. | |
687 // Commented out in product version to avoid conflicts with third-party C++ native code. | |
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688 // On certain platforms, such as Mac OS X (Darwin), in debug version, new is being called |
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689 // from jdk source and causing data corruption. Such as |
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690 // Java_sun_security_ec_ECKeyPairGenerator_generateECKeyPair |
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691 // define ALLOW_OPERATOR_NEW_USAGE for platform on which global operator new allowed. |
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692 // |
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693 #ifndef ALLOW_OPERATOR_NEW_USAGE |
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694 void* operator new(size_t size) throw() { |
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695 assert(false, "Should not call global operator new"); |
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696 return 0; |
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697 } |
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698 |
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699 void* operator new [](size_t size) throw() { |
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700 assert(false, "Should not call global operator new[]"); |
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701 return 0; |
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702 } |
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703 |
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704 void* operator new(size_t size, const std::nothrow_t& nothrow_constant) throw() { |
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705 assert(false, "Should not call global operator new"); |
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706 return 0; |
0 | 707 } |
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708 |
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709 void* operator new [](size_t size, std::nothrow_t& nothrow_constant) throw() { |
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710 assert(false, "Should not call global operator new[]"); |
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711 return 0; |
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712 } |
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713 |
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714 void operator delete(void* p) { |
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715 assert(false, "Should not call global delete"); |
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716 } |
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717 |
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718 void operator delete [](void* p) { |
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719 assert(false, "Should not call global delete []"); |
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720 } |
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721 #endif // ALLOW_OPERATOR_NEW_USAGE |
0 | 722 |
723 void AllocatedObj::print() const { print_on(tty); } | |
724 void AllocatedObj::print_value() const { print_value_on(tty); } | |
725 | |
726 void AllocatedObj::print_on(outputStream* st) const { | |
727 st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", this); | |
728 } | |
729 | |
730 void AllocatedObj::print_value_on(outputStream* st) const { | |
731 st->print("AllocatedObj(" INTPTR_FORMAT ")", this); | |
732 } | |
733 | |
2250 | 734 julong Arena::_bytes_allocated = 0; |
735 | |
736 void Arena::inc_bytes_allocated(size_t x) { inc_stat_counter(&_bytes_allocated, x); } | |
0 | 737 |
738 AllocStats::AllocStats() { | |
2250 | 739 start_mallocs = os::num_mallocs; |
740 start_frees = os::num_frees; | |
0 | 741 start_malloc_bytes = os::alloc_bytes; |
2250 | 742 start_mfree_bytes = os::free_bytes; |
743 start_res_bytes = Arena::_bytes_allocated; | |
0 | 744 } |
745 | |
2250 | 746 julong AllocStats::num_mallocs() { return os::num_mallocs - start_mallocs; } |
747 julong AllocStats::alloc_bytes() { return os::alloc_bytes - start_malloc_bytes; } | |
748 julong AllocStats::num_frees() { return os::num_frees - start_frees; } | |
749 julong AllocStats::free_bytes() { return os::free_bytes - start_mfree_bytes; } | |
750 julong AllocStats::resource_bytes() { return Arena::_bytes_allocated - start_res_bytes; } | |
0 | 751 void AllocStats::print() { |
2250 | 752 tty->print_cr(UINT64_FORMAT " mallocs (" UINT64_FORMAT "MB), " |
753 UINT64_FORMAT" frees (" UINT64_FORMAT "MB), " UINT64_FORMAT "MB resrc", | |
754 num_mallocs(), alloc_bytes()/M, num_frees(), free_bytes()/M, resource_bytes()/M); | |
0 | 755 } |
756 | |
757 | |
758 // debugging code | |
759 inline void Arena::free_all(char** start, char** end) { | |
760 for (char** p = start; p < end; p++) if (*p) os::free(*p); | |
761 } | |
762 | |
763 void Arena::free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) { | |
764 assert(UseMallocOnly, "should not call"); | |
765 // free all objects malloced since resource mark was created; resource area | |
766 // contains their addresses | |
767 if (chunk->next()) { | |
768 // this chunk is full, and some others too | |
769 for (Chunk* c = chunk->next(); c != NULL; c = c->next()) { | |
770 char* top = c->top(); | |
771 if (c->next() == NULL) { | |
772 top = hwm2; // last junk is only used up to hwm2 | |
773 assert(c->contains(hwm2), "bad hwm2"); | |
774 } | |
775 free_all((char**)c->bottom(), (char**)top); | |
776 } | |
777 assert(chunk->contains(hwm), "bad hwm"); | |
778 assert(chunk->contains(max), "bad max"); | |
779 free_all((char**)hwm, (char**)max); | |
780 } else { | |
781 // this chunk was partially used | |
782 assert(chunk->contains(hwm), "bad hwm"); | |
783 assert(chunk->contains(hwm2), "bad hwm2"); | |
784 free_all((char**)hwm, (char**)hwm2); | |
785 } | |
786 } | |
787 | |
788 | |
789 ReallocMark::ReallocMark() { | |
790 #ifdef ASSERT | |
791 Thread *thread = ThreadLocalStorage::get_thread_slow(); | |
792 _nesting = thread->resource_area()->nesting(); | |
793 #endif | |
794 } | |
795 | |
796 void ReallocMark::check() { | |
797 #ifdef ASSERT | |
798 if (_nesting != Thread::current()->resource_area()->nesting()) { | |
799 fatal("allocation bug: array could grow within nested ResourceMark"); | |
800 } | |
801 #endif | |
802 } | |
803 | |
804 #endif // Non-product |