Mercurial > hg > graal-compiler
annotate src/share/vm/memory/allocation.cpp @ 18041:52b4284cb496
Merge with jdk8u20-b26
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 16:02:50 +0200 |
| parents | 4ca6dc0799b6 09619752c16d |
| children | 7848fc12602b |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #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 bool MetaspaceObj::is_metaspace_object() const { |
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78 return Metaspace::contains((void*)this); |
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79 } |
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80 |
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81 void MetaspaceObj::print_address_on(outputStream* st) const { |
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82 st->print(" {" INTPTR_FORMAT "}", p2i(this)); |
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83 } |
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84 |
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85 void* ResourceObj::operator new(size_t size, allocation_type type, MEMFLAGS flags) throw() { |
| 0 | 86 address res; |
| 87 switch (type) { | |
| 88 case C_HEAP: | |
| 6197 | 89 res = (address)AllocateHeap(size, flags, CALLER_PC); |
| 1685 | 90 DEBUG_ONLY(set_allocation_type(res, C_HEAP);) |
| 0 | 91 break; |
| 92 case RESOURCE_AREA: | |
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93 // new(size) sets allocation type RESOURCE_AREA. |
| 0 | 94 res = (address)operator new(size); |
| 95 break; | |
| 96 default: | |
| 97 ShouldNotReachHere(); | |
| 98 } | |
| 99 return res; | |
| 100 } | |
| 101 | |
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102 void* ResourceObj::operator new [](size_t size, allocation_type type, MEMFLAGS flags) throw() { |
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103 return (address) operator new(size, type, flags); |
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104 } |
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105 |
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106 void* ResourceObj::operator new(size_t size, const std::nothrow_t& nothrow_constant, |
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107 allocation_type type, MEMFLAGS flags) throw() { |
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108 //should only call this with std::nothrow, use other operator new() otherwise |
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109 address res; |
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110 switch (type) { |
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111 case C_HEAP: |
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112 res = (address)AllocateHeap(size, flags, CALLER_PC, AllocFailStrategy::RETURN_NULL); |
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113 DEBUG_ONLY(if (res!= NULL) set_allocation_type(res, C_HEAP);) |
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114 break; |
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115 case RESOURCE_AREA: |
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116 // new(size) sets allocation type RESOURCE_AREA. |
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117 res = (address)operator new(size, std::nothrow); |
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118 break; |
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119 default: |
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120 ShouldNotReachHere(); |
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121 } |
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122 return res; |
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123 } |
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124 |
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125 void* ResourceObj::operator new [](size_t size, const std::nothrow_t& nothrow_constant, |
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126 allocation_type type, MEMFLAGS flags) throw() { |
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127 return (address)operator new(size, nothrow_constant, type, flags); |
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128 } |
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129 |
| 0 | 130 void ResourceObj::operator delete(void* p) { |
| 131 assert(((ResourceObj *)p)->allocated_on_C_heap(), | |
| 132 "delete only allowed for C_HEAP objects"); | |
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133 DEBUG_ONLY(((ResourceObj *)p)->_allocation_t[0] = (uintptr_t)badHeapOopVal;) |
| 0 | 134 FreeHeap(p); |
| 135 } | |
| 136 | |
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137 void ResourceObj::operator delete [](void* p) { |
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138 operator delete(p); |
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139 } |
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140 |
| 1685 | 141 #ifdef ASSERT |
| 142 void ResourceObj::set_allocation_type(address res, allocation_type type) { | |
| 143 // Set allocation type in the resource object | |
| 144 uintptr_t allocation = (uintptr_t)res; | |
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145 assert((allocation & allocation_mask) == 0, err_msg("address should be aligned to 4 bytes at least: " INTPTR_FORMAT, p2i(res))); |
| 1685 | 146 assert(type <= allocation_mask, "incorrect allocation type"); |
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147 ResourceObj* resobj = (ResourceObj *)res; |
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148 resobj->_allocation_t[0] = ~(allocation + type); |
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149 if (type != STACK_OR_EMBEDDED) { |
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150 // Called from operator new() and CollectionSetChooser(), |
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151 // set verification value. |
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152 resobj->_allocation_t[1] = (uintptr_t)&(resobj->_allocation_t[1]) + type; |
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153 } |
| 1685 | 154 } |
| 155 | |
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156 ResourceObj::allocation_type ResourceObj::get_allocation_type() const { |
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157 assert(~(_allocation_t[0] | allocation_mask) == (uintptr_t)this, "lost resource object"); |
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158 return (allocation_type)((~_allocation_t[0]) & allocation_mask); |
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159 } |
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160 |
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161 bool ResourceObj::is_type_set() const { |
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162 allocation_type type = (allocation_type)(_allocation_t[1] & allocation_mask); |
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163 return get_allocation_type() == type && |
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164 (_allocation_t[1] - type) == (uintptr_t)(&_allocation_t[1]); |
| 1685 | 165 } |
| 166 | |
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167 ResourceObj::ResourceObj() { // default constructor |
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168 if (~(_allocation_t[0] | allocation_mask) != (uintptr_t)this) { |
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169 // Operator new() is not called for allocations |
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170 // on stack and for embedded objects. |
| 1685 | 171 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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172 } else if (allocated_on_stack()) { // STACK_OR_EMBEDDED |
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173 // For some reason we got a value which resembles |
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174 // an embedded or stack object (operator new() does not |
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175 // set such type). Keep it since it is valid value |
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176 // (even if it was garbage). |
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177 // Ignore garbage in other fields. |
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178 } else if (is_type_set()) { |
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179 // Operator new() was called and type was set. |
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180 assert(!allocated_on_stack(), |
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181 err_msg("not embedded or stack, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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182 p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
| 1685 | 183 } else { |
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184 // Operator new() was not called. |
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185 // Assume that it is embedded or stack object. |
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186 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
| 1685 | 187 } |
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188 _allocation_t[1] = 0; // Zap verification value |
| 1685 | 189 } |
| 190 | |
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191 ResourceObj::ResourceObj(const ResourceObj& r) { // default copy constructor |
| 1685 | 192 // Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream. |
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193 // Note: garbage may resembles valid value. |
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194 assert(~(_allocation_t[0] | allocation_mask) != (uintptr_t)this || !is_type_set(), |
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195 err_msg("embedded or stack only, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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196 p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
| 1685 | 197 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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198 _allocation_t[1] = 0; // Zap verification value |
| 1685 | 199 } |
| 200 | |
| 201 ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment | |
| 202 // Used in InlineTree::ok_to_inline() for WarmCallInfo. | |
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203 assert(allocated_on_stack(), |
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204 err_msg("copy only into local, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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205 p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
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206 // Keep current _allocation_t value; |
| 1685 | 207 return *this; |
| 208 } | |
| 209 | |
| 210 ResourceObj::~ResourceObj() { | |
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211 // allocated_on_C_heap() also checks that encoded (in _allocation) address == this. |
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212 if (!allocated_on_C_heap()) { // ResourceObj::delete() will zap _allocation for C_heap. |
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213 _allocation_t[0] = (uintptr_t)badHeapOopVal; // zap type |
| 1685 | 214 } |
| 215 } | |
| 216 #endif // ASSERT | |
| 217 | |
| 218 | |
| 0 | 219 void trace_heap_malloc(size_t size, const char* name, void* p) { |
| 220 // A lock is not needed here - tty uses a lock internally | |
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221 tty->print_cr("Heap malloc " INTPTR_FORMAT " " SIZE_FORMAT " %s", p2i(p), size, name == NULL ? "" : name); |
| 0 | 222 } |
| 223 | |
| 224 | |
| 225 void trace_heap_free(void* p) { | |
| 226 // A lock is not needed here - tty uses a lock internally | |
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227 tty->print_cr("Heap free " INTPTR_FORMAT, p2i(p)); |
| 0 | 228 } |
| 229 | |
| 230 //-------------------------------------------------------------------------------------- | |
| 231 // ChunkPool implementation | |
| 232 | |
| 233 // MT-safe pool of chunks to reduce malloc/free thrashing | |
| 234 // NB: not using Mutex because pools are used before Threads are initialized | |
| 6197 | 235 class ChunkPool: public CHeapObj<mtInternal> { |
| 0 | 236 Chunk* _first; // first cached Chunk; its first word points to next chunk |
| 237 size_t _num_chunks; // number of unused chunks in pool | |
| 238 size_t _num_used; // number of chunks currently checked out | |
| 239 const size_t _size; // size of each chunk (must be uniform) | |
| 240 | |
| 11095 | 241 // Our four static pools |
| 0 | 242 static ChunkPool* _large_pool; |
| 243 static ChunkPool* _medium_pool; | |
| 244 static ChunkPool* _small_pool; | |
| 11095 | 245 static ChunkPool* _tiny_pool; |
| 0 | 246 |
| 247 // return first element or null | |
| 248 void* get_first() { | |
| 249 Chunk* c = _first; | |
| 250 if (_first) { | |
| 251 _first = _first->next(); | |
| 252 _num_chunks--; | |
| 253 } | |
| 254 return c; | |
| 255 } | |
| 256 | |
| 257 public: | |
| 258 // All chunks in a ChunkPool has the same size | |
| 259 ChunkPool(size_t size) : _size(size) { _first = NULL; _num_chunks = _num_used = 0; } | |
| 260 | |
| 261 // Allocate a new chunk from the pool (might expand the pool) | |
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262 _NOINLINE_ void* allocate(size_t bytes, AllocFailType alloc_failmode) { |
| 0 | 263 assert(bytes == _size, "bad size"); |
| 264 void* p = NULL; | |
| 6197 | 265 // No VM lock can be taken inside ThreadCritical lock, so os::malloc |
| 266 // should be done outside ThreadCritical lock due to NMT | |
| 0 | 267 { ThreadCritical tc; |
| 268 _num_used++; | |
| 269 p = get_first(); | |
| 270 } | |
| 6197 | 271 if (p == NULL) p = os::malloc(bytes, mtChunk, CURRENT_PC); |
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272 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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273 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "ChunkPool::allocate"); |
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274 } |
| 0 | 275 return p; |
| 276 } | |
| 277 | |
| 278 // Return a chunk to the pool | |
| 279 void free(Chunk* chunk) { | |
| 280 assert(chunk->length() + Chunk::aligned_overhead_size() == _size, "bad size"); | |
| 281 ThreadCritical tc; | |
| 282 _num_used--; | |
| 283 | |
| 284 // Add chunk to list | |
| 285 chunk->set_next(_first); | |
| 286 _first = chunk; | |
| 287 _num_chunks++; | |
| 288 } | |
| 289 | |
| 290 // Prune the pool | |
| 291 void free_all_but(size_t n) { | |
| 6197 | 292 Chunk* cur = NULL; |
| 293 Chunk* next; | |
| 294 { | |
| 0 | 295 // if we have more than n chunks, free all of them |
| 296 ThreadCritical tc; | |
| 297 if (_num_chunks > n) { | |
| 298 // free chunks at end of queue, for better locality | |
| 6197 | 299 cur = _first; |
| 0 | 300 for (size_t i = 0; i < (n - 1) && cur != NULL; i++) cur = cur->next(); |
| 301 | |
| 302 if (cur != NULL) { | |
| 6197 | 303 next = cur->next(); |
| 0 | 304 cur->set_next(NULL); |
| 305 cur = next; | |
| 306 | |
| 6197 | 307 _num_chunks = n; |
| 308 } | |
| 309 } | |
| 310 } | |
| 311 | |
| 312 // Free all remaining chunks, outside of ThreadCritical | |
| 313 // to avoid deadlock with NMT | |
| 0 | 314 while(cur != NULL) { |
| 315 next = cur->next(); | |
| 6197 | 316 os::free(cur, mtChunk); |
| 0 | 317 cur = next; |
| 318 } | |
| 319 } | |
| 320 | |
| 321 // Accessors to preallocated pool's | |
| 322 static ChunkPool* large_pool() { assert(_large_pool != NULL, "must be initialized"); return _large_pool; } | |
| 323 static ChunkPool* medium_pool() { assert(_medium_pool != NULL, "must be initialized"); return _medium_pool; } | |
| 324 static ChunkPool* small_pool() { assert(_small_pool != NULL, "must be initialized"); return _small_pool; } | |
| 11095 | 325 static ChunkPool* tiny_pool() { assert(_tiny_pool != NULL, "must be initialized"); return _tiny_pool; } |
| 0 | 326 |
| 327 static void initialize() { | |
| 328 _large_pool = new ChunkPool(Chunk::size + Chunk::aligned_overhead_size()); | |
| 329 _medium_pool = new ChunkPool(Chunk::medium_size + Chunk::aligned_overhead_size()); | |
| 330 _small_pool = new ChunkPool(Chunk::init_size + Chunk::aligned_overhead_size()); | |
| 11095 | 331 _tiny_pool = new ChunkPool(Chunk::tiny_size + Chunk::aligned_overhead_size()); |
| 0 | 332 } |
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333 |
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334 static void clean() { |
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335 enum { BlocksToKeep = 5 }; |
| 11095 | 336 _tiny_pool->free_all_but(BlocksToKeep); |
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337 _small_pool->free_all_but(BlocksToKeep); |
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338 _medium_pool->free_all_but(BlocksToKeep); |
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339 _large_pool->free_all_but(BlocksToKeep); |
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340 } |
| 0 | 341 }; |
| 342 | |
| 343 ChunkPool* ChunkPool::_large_pool = NULL; | |
| 344 ChunkPool* ChunkPool::_medium_pool = NULL; | |
| 345 ChunkPool* ChunkPool::_small_pool = NULL; | |
| 11095 | 346 ChunkPool* ChunkPool::_tiny_pool = NULL; |
| 0 | 347 |
| 348 void chunkpool_init() { | |
| 349 ChunkPool::initialize(); | |
| 350 } | |
| 351 | |
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352 void |
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353 Chunk::clean_chunk_pool() { |
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354 ChunkPool::clean(); |
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355 } |
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356 |
| 0 | 357 |
| 358 //-------------------------------------------------------------------------------------- | |
| 359 // ChunkPoolCleaner implementation | |
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360 // |
| 0 | 361 |
| 362 class ChunkPoolCleaner : public PeriodicTask { | |
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363 enum { CleaningInterval = 5000 }; // cleaning interval in ms |
| 0 | 364 |
| 365 public: | |
| 366 ChunkPoolCleaner() : PeriodicTask(CleaningInterval) {} | |
| 367 void task() { | |
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368 ChunkPool::clean(); |
| 0 | 369 } |
| 370 }; | |
| 371 | |
| 372 //-------------------------------------------------------------------------------------- | |
| 373 // Chunk implementation | |
| 374 | |
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375 void* Chunk::operator new (size_t requested_size, AllocFailType alloc_failmode, size_t length) throw() { |
| 0 | 376 // requested_size is equal to sizeof(Chunk) but in order for the arena |
| 377 // allocations to come out aligned as expected the size must be aligned | |
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378 // to expected arena alignment. |
| 0 | 379 // expect requested_size but if sizeof(Chunk) doesn't match isn't proper size we must align it. |
| 380 assert(ARENA_ALIGN(requested_size) == aligned_overhead_size(), "Bad alignment"); | |
| 381 size_t bytes = ARENA_ALIGN(requested_size) + length; | |
| 382 switch (length) { | |
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383 case Chunk::size: return ChunkPool::large_pool()->allocate(bytes, alloc_failmode); |
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384 case Chunk::medium_size: return ChunkPool::medium_pool()->allocate(bytes, alloc_failmode); |
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385 case Chunk::init_size: return ChunkPool::small_pool()->allocate(bytes, alloc_failmode); |
| 11095 | 386 case Chunk::tiny_size: return ChunkPool::tiny_pool()->allocate(bytes, alloc_failmode); |
| 0 | 387 default: { |
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388 void* p = os::malloc(bytes, mtChunk, CALLER_PC); |
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389 if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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390 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "Chunk::new"); |
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391 } |
| 0 | 392 return p; |
| 393 } | |
| 394 } | |
| 395 } | |
| 396 | |
| 397 void Chunk::operator delete(void* p) { | |
| 398 Chunk* c = (Chunk*)p; | |
| 399 switch (c->length()) { | |
| 400 case Chunk::size: ChunkPool::large_pool()->free(c); break; | |
| 401 case Chunk::medium_size: ChunkPool::medium_pool()->free(c); break; | |
| 402 case Chunk::init_size: ChunkPool::small_pool()->free(c); break; | |
| 11095 | 403 case Chunk::tiny_size: ChunkPool::tiny_pool()->free(c); break; |
| 6197 | 404 default: os::free(c, mtChunk); |
| 0 | 405 } |
| 406 } | |
| 407 | |
| 408 Chunk::Chunk(size_t length) : _len(length) { | |
| 409 _next = NULL; // Chain on the linked list | |
| 410 } | |
| 411 | |
| 412 | |
| 413 void Chunk::chop() { | |
| 414 Chunk *k = this; | |
| 415 while( k ) { | |
| 416 Chunk *tmp = k->next(); | |
| 417 // clear out this chunk (to detect allocation bugs) | |
| 418 if (ZapResourceArea) memset(k->bottom(), badResourceValue, k->length()); | |
| 419 delete k; // Free chunk (was malloc'd) | |
| 420 k = tmp; | |
| 421 } | |
| 422 } | |
| 423 | |
| 424 void Chunk::next_chop() { | |
| 425 _next->chop(); | |
| 426 _next = NULL; | |
| 427 } | |
| 428 | |
| 429 | |
| 430 void Chunk::start_chunk_pool_cleaner_task() { | |
| 431 #ifdef ASSERT | |
| 432 static bool task_created = false; | |
| 433 assert(!task_created, "should not start chuck pool cleaner twice"); | |
| 434 task_created = true; | |
| 435 #endif | |
| 436 ChunkPoolCleaner* cleaner = new ChunkPoolCleaner(); | |
| 437 cleaner->enroll(); | |
| 438 } | |
| 439 | |
| 440 //------------------------------Arena------------------------------------------ | |
| 6197 | 441 NOT_PRODUCT(volatile jint Arena::_instance_count = 0;) |
| 0 | 442 |
| 443 Arena::Arena(size_t init_size) { | |
| 444 size_t round_size = (sizeof (char *)) - 1; | |
| 445 init_size = (init_size+round_size) & ~round_size; | |
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446 _first = _chunk = new (AllocFailStrategy::EXIT_OOM, init_size) Chunk(init_size); |
| 0 | 447 _hwm = _chunk->bottom(); // Save the cached hwm, max |
| 448 _max = _chunk->top(); | |
| 449 set_size_in_bytes(init_size); | |
| 6197 | 450 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
| 0 | 451 } |
| 452 | |
| 453 Arena::Arena() { | |
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454 _first = _chunk = new (AllocFailStrategy::EXIT_OOM, Chunk::init_size) Chunk(Chunk::init_size); |
| 0 | 455 _hwm = _chunk->bottom(); // Save the cached hwm, max |
| 456 _max = _chunk->top(); | |
| 457 set_size_in_bytes(Chunk::init_size); | |
| 6197 | 458 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
| 0 | 459 } |
| 460 | |
| 461 Arena *Arena::move_contents(Arena *copy) { | |
| 462 copy->destruct_contents(); | |
| 463 copy->_chunk = _chunk; | |
| 464 copy->_hwm = _hwm; | |
| 465 copy->_max = _max; | |
| 466 copy->_first = _first; | |
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467 |
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468 // workaround rare racing condition, which could double count |
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469 // the arena size by native memory tracking |
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470 size_t size = size_in_bytes(); |
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471 set_size_in_bytes(0); |
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472 copy->set_size_in_bytes(size); |
| 0 | 473 // Destroy original arena |
| 474 reset(); | |
| 475 return copy; // Return Arena with contents | |
| 476 } | |
| 477 | |
| 478 Arena::~Arena() { | |
| 479 destruct_contents(); | |
| 6197 | 480 NOT_PRODUCT(Atomic::dec(&_instance_count);) |
| 481 } | |
| 482 | |
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483 void* Arena::operator new(size_t size) throw() { |
| 6197 | 484 assert(false, "Use dynamic memory type binding"); |
| 485 return NULL; | |
| 486 } | |
| 487 | |
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488 void* Arena::operator new (size_t size, const std::nothrow_t& nothrow_constant) throw() { |
| 6197 | 489 assert(false, "Use dynamic memory type binding"); |
| 490 return NULL; | |
| 491 } | |
| 492 | |
| 493 // dynamic memory type binding | |
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494 void* Arena::operator new(size_t size, MEMFLAGS flags) throw() { |
| 6197 | 495 #ifdef ASSERT |
| 496 void* p = (void*)AllocateHeap(size, flags|otArena, CALLER_PC); | |
| 497 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); | |
| 498 return p; | |
| 499 #else | |
| 500 return (void *) AllocateHeap(size, flags|otArena, CALLER_PC); | |
| 501 #endif | |
| 502 } | |
| 503 | |
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504 void* Arena::operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags) throw() { |
| 6197 | 505 #ifdef ASSERT |
| 506 void* p = os::malloc(size, flags|otArena, CALLER_PC); | |
| 507 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); | |
| 508 return p; | |
| 509 #else | |
| 510 return os::malloc(size, flags|otArena, CALLER_PC); | |
| 511 #endif | |
| 512 } | |
| 513 | |
| 514 void Arena::operator delete(void* p) { | |
| 515 FreeHeap(p); | |
| 0 | 516 } |
| 517 | |
| 518 // Destroy this arenas contents and reset to empty | |
| 519 void Arena::destruct_contents() { | |
| 520 if (UseMallocOnly && _first != NULL) { | |
| 521 char* end = _first->next() ? _first->top() : _hwm; | |
| 522 free_malloced_objects(_first, _first->bottom(), end, _hwm); | |
| 523 } | |
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524 // reset size before chop to avoid a rare racing condition |
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525 // that can have total arena memory exceed total chunk memory |
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526 set_size_in_bytes(0); |
| 0 | 527 _first->chop(); |
| 528 reset(); | |
| 529 } | |
| 530 | |
| 6197 | 531 // This is high traffic method, but many calls actually don't |
| 532 // change the size | |
| 533 void Arena::set_size_in_bytes(size_t size) { | |
| 534 if (_size_in_bytes != size) { | |
| 535 _size_in_bytes = size; | |
| 536 MemTracker::record_arena_size((address)this, size); | |
| 537 } | |
| 538 } | |
| 0 | 539 |
| 540 // Total of all Chunks in arena | |
| 541 size_t Arena::used() const { | |
| 542 size_t sum = _chunk->length() - (_max-_hwm); // Size leftover in this Chunk | |
| 543 register Chunk *k = _first; | |
| 544 while( k != _chunk) { // Whilst have Chunks in a row | |
| 545 sum += k->length(); // Total size of this Chunk | |
| 546 k = k->next(); // Bump along to next Chunk | |
| 547 } | |
| 548 return sum; // Return total consumed space. | |
| 549 } | |
| 550 | |
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551 void Arena::signal_out_of_memory(size_t sz, const char* whence) const { |
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552 vm_exit_out_of_memory(sz, OOM_MALLOC_ERROR, whence); |
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553 } |
| 0 | 554 |
| 555 // Grow a new Chunk | |
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556 void* Arena::grow(size_t x, AllocFailType alloc_failmode) { |
| 0 | 557 // Get minimal required size. Either real big, or even bigger for giant objs |
| 558 size_t len = MAX2(x, (size_t) Chunk::size); | |
| 559 | |
| 560 Chunk *k = _chunk; // Get filled-up chunk address | |
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561 _chunk = new (alloc_failmode, len) Chunk(len); |
| 0 | 562 |
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563 if (_chunk == NULL) { |
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564 _chunk = k; // restore the previous value of _chunk |
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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 { | |
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727 st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", p2i(this)); |
| 0 | 728 } |
| 729 | |
| 730 void AllocatedObj::print_value_on(outputStream* st) const { | |
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731 st->print("AllocatedObj(" INTPTR_FORMAT ")", p2i(this)); |
| 0 | 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 |