Mercurial > hg > graal-compiler
annotate src/share/vm/memory/allocation.cpp @ 10161:746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
Reviewed-by: coleenp, zgu, hseigel
| author | ccheung |
|---|---|
| date | Tue, 30 Apr 2013 11:56:52 -0700 |
| parents | 5a9fa2ba85f0 |
| children | f9be75d21404 7ee0d5c53c78 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10135 | 2 * Copyright (c) 1997, 2012, 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 | |
| 3960 | 48 #ifdef TARGET_OS_FAMILY_bsd |
| 49 # include "os_bsd.inline.hpp" | |
| 50 #endif | |
| 0 | 51 |
| 52 void* StackObj::operator new(size_t size) { ShouldNotCallThis(); return 0; }; | |
| 53 void StackObj::operator delete(void* p) { ShouldNotCallThis(); }; | |
| 54 void* _ValueObj::operator new(size_t size) { ShouldNotCallThis(); return 0; }; | |
| 55 void _ValueObj::operator delete(void* p) { ShouldNotCallThis(); }; | |
| 56 | |
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57 void* MetaspaceObj::operator new(size_t size, ClassLoaderData* loader_data, |
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58 size_t word_size, bool read_only, TRAPS) { |
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59 // Klass has it's own operator new |
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60 return Metaspace::allocate(loader_data, word_size, read_only, |
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61 Metaspace::NonClassType, CHECK_NULL); |
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62 } |
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63 |
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64 bool MetaspaceObj::is_shared() const { |
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65 return MetaspaceShared::is_in_shared_space(this); |
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66 } |
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67 |
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68 bool MetaspaceObj::is_metadata() const { |
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69 // GC Verify checks use this in guarantees. |
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70 // TODO: either replace them with is_metaspace_object() or remove them. |
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71 // is_metaspace_object() is slower than this test. This test doesn't |
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72 // seem very useful for metaspace objects anymore though. |
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73 return !Universe::heap()->is_in_reserved(this); |
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74 } |
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75 |
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76 bool MetaspaceObj::is_metaspace_object() const { |
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77 return Metaspace::contains((void*)this); |
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78 } |
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79 |
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80 void MetaspaceObj::print_address_on(outputStream* st) const { |
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81 st->print(" {"INTPTR_FORMAT"}", this); |
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82 } |
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83 |
| 10135 | 84 |
| 6197 | 85 void* ResourceObj::operator new(size_t size, allocation_type type, MEMFLAGS flags) { |
| 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, const std::nothrow_t& nothrow_constant, |
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103 allocation_type type, MEMFLAGS flags) { |
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104 //should only call this with std::nothrow, use other operator new() otherwise |
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105 address res; |
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106 switch (type) { |
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107 case C_HEAP: |
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108 res = (address)AllocateHeap(size, flags, CALLER_PC, AllocFailStrategy::RETURN_NULL); |
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109 DEBUG_ONLY(if (res!= NULL) set_allocation_type(res, C_HEAP);) |
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110 break; |
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111 case RESOURCE_AREA: |
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112 // new(size) sets allocation type RESOURCE_AREA. |
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113 res = (address)operator new(size, std::nothrow); |
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114 break; |
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115 default: |
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116 ShouldNotReachHere(); |
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117 } |
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118 return res; |
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119 } |
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120 |
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121 |
| 0 | 122 void ResourceObj::operator delete(void* p) { |
| 123 assert(((ResourceObj *)p)->allocated_on_C_heap(), | |
| 124 "delete only allowed for C_HEAP objects"); | |
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125 DEBUG_ONLY(((ResourceObj *)p)->_allocation_t[0] = (uintptr_t)badHeapOopVal;) |
| 0 | 126 FreeHeap(p); |
| 127 } | |
| 128 | |
| 1685 | 129 #ifdef ASSERT |
| 130 void ResourceObj::set_allocation_type(address res, allocation_type type) { | |
| 131 // Set allocation type in the resource object | |
| 132 uintptr_t allocation = (uintptr_t)res; | |
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133 assert((allocation & allocation_mask) == 0, "address should be aligned to 4 bytes at least"); |
| 1685 | 134 assert(type <= allocation_mask, "incorrect allocation type"); |
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135 ResourceObj* resobj = (ResourceObj *)res; |
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136 resobj->_allocation_t[0] = ~(allocation + type); |
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137 if (type != STACK_OR_EMBEDDED) { |
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138 // Called from operator new() and CollectionSetChooser(), |
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139 // set verification value. |
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140 resobj->_allocation_t[1] = (uintptr_t)&(resobj->_allocation_t[1]) + type; |
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141 } |
| 1685 | 142 } |
| 143 | |
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144 ResourceObj::allocation_type ResourceObj::get_allocation_type() const { |
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145 assert(~(_allocation_t[0] | allocation_mask) == (uintptr_t)this, "lost resource object"); |
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146 return (allocation_type)((~_allocation_t[0]) & allocation_mask); |
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147 } |
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148 |
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149 bool ResourceObj::is_type_set() const { |
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150 allocation_type type = (allocation_type)(_allocation_t[1] & allocation_mask); |
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151 return get_allocation_type() == type && |
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152 (_allocation_t[1] - type) == (uintptr_t)(&_allocation_t[1]); |
| 1685 | 153 } |
| 154 | |
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155 ResourceObj::ResourceObj() { // default constructor |
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156 if (~(_allocation_t[0] | allocation_mask) != (uintptr_t)this) { |
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157 // Operator new() is not called for allocations |
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158 // on stack and for embedded objects. |
| 1685 | 159 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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160 } else if (allocated_on_stack()) { // STACK_OR_EMBEDDED |
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161 // For some reason we got a value which resembles |
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162 // an embedded or stack object (operator new() does not |
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163 // set such type). Keep it since it is valid value |
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164 // (even if it was garbage). |
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165 // Ignore garbage in other fields. |
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166 } else if (is_type_set()) { |
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167 // Operator new() was called and type was set. |
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168 assert(!allocated_on_stack(), |
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169 err_msg("not embedded or stack, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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170 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
| 1685 | 171 } else { |
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172 // Operator new() was not called. |
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173 // Assume that it is embedded or stack object. |
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174 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
| 1685 | 175 } |
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176 _allocation_t[1] = 0; // Zap verification value |
| 1685 | 177 } |
| 178 | |
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179 ResourceObj::ResourceObj(const ResourceObj& r) { // default copy constructor |
| 1685 | 180 // Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream. |
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181 // Note: garbage may resembles valid value. |
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182 assert(~(_allocation_t[0] | allocation_mask) != (uintptr_t)this || !is_type_set(), |
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183 err_msg("embedded or stack only, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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184 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
| 1685 | 185 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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186 _allocation_t[1] = 0; // Zap verification value |
| 1685 | 187 } |
| 188 | |
| 189 ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment | |
| 190 // Used in InlineTree::ok_to_inline() for WarmCallInfo. | |
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191 assert(allocated_on_stack(), |
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192 err_msg("copy only into local, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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193 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
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194 // Keep current _allocation_t value; |
| 1685 | 195 return *this; |
| 196 } | |
| 197 | |
| 198 ResourceObj::~ResourceObj() { | |
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199 // allocated_on_C_heap() also checks that encoded (in _allocation) address == this. |
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200 if (!allocated_on_C_heap()) { // ResourceObj::delete() will zap _allocation for C_heap. |
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201 _allocation_t[0] = (uintptr_t)badHeapOopVal; // zap type |
| 1685 | 202 } |
| 203 } | |
| 204 #endif // ASSERT | |
| 205 | |
| 206 | |
| 0 | 207 void trace_heap_malloc(size_t size, const char* name, void* p) { |
| 208 // A lock is not needed here - tty uses a lock internally | |
| 2250 | 209 tty->print_cr("Heap malloc " INTPTR_FORMAT " " SIZE_FORMAT " %s", p, size, name == NULL ? "" : name); |
| 0 | 210 } |
| 211 | |
| 212 | |
| 213 void trace_heap_free(void* p) { | |
| 214 // A lock is not needed here - tty uses a lock internally | |
| 215 tty->print_cr("Heap free " INTPTR_FORMAT, p); | |
| 216 } | |
| 217 | |
| 218 bool warn_new_operator = false; // see vm_main | |
| 219 | |
| 220 //-------------------------------------------------------------------------------------- | |
| 221 // ChunkPool implementation | |
| 222 | |
| 223 // MT-safe pool of chunks to reduce malloc/free thrashing | |
| 224 // NB: not using Mutex because pools are used before Threads are initialized | |
| 6197 | 225 class ChunkPool: public CHeapObj<mtInternal> { |
| 0 | 226 Chunk* _first; // first cached Chunk; its first word points to next chunk |
| 227 size_t _num_chunks; // number of unused chunks in pool | |
| 228 size_t _num_used; // number of chunks currently checked out | |
| 229 const size_t _size; // size of each chunk (must be uniform) | |
| 230 | |
| 231 // Our three static pools | |
| 232 static ChunkPool* _large_pool; | |
| 233 static ChunkPool* _medium_pool; | |
| 234 static ChunkPool* _small_pool; | |
| 235 | |
| 236 // return first element or null | |
| 237 void* get_first() { | |
| 238 Chunk* c = _first; | |
| 239 if (_first) { | |
| 240 _first = _first->next(); | |
| 241 _num_chunks--; | |
| 242 } | |
| 243 return c; | |
| 244 } | |
| 245 | |
| 246 public: | |
| 247 // All chunks in a ChunkPool has the same size | |
| 248 ChunkPool(size_t size) : _size(size) { _first = NULL; _num_chunks = _num_used = 0; } | |
| 249 | |
| 250 // Allocate a new chunk from the pool (might expand the pool) | |
| 6197 | 251 _NOINLINE_ void* allocate(size_t bytes) { |
| 0 | 252 assert(bytes == _size, "bad size"); |
| 253 void* p = NULL; | |
| 6197 | 254 // No VM lock can be taken inside ThreadCritical lock, so os::malloc |
| 255 // should be done outside ThreadCritical lock due to NMT | |
| 0 | 256 { ThreadCritical tc; |
| 257 _num_used++; | |
| 258 p = get_first(); | |
| 259 } | |
| 6197 | 260 if (p == NULL) p = os::malloc(bytes, mtChunk, CURRENT_PC); |
| 0 | 261 if (p == NULL) |
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262 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "ChunkPool::allocate"); |
| 0 | 263 |
| 264 return p; | |
| 265 } | |
| 266 | |
| 267 // Return a chunk to the pool | |
| 268 void free(Chunk* chunk) { | |
| 269 assert(chunk->length() + Chunk::aligned_overhead_size() == _size, "bad size"); | |
| 270 ThreadCritical tc; | |
| 271 _num_used--; | |
| 272 | |
| 273 // Add chunk to list | |
| 274 chunk->set_next(_first); | |
| 275 _first = chunk; | |
| 276 _num_chunks++; | |
| 277 } | |
| 278 | |
| 279 // Prune the pool | |
| 280 void free_all_but(size_t n) { | |
| 6197 | 281 Chunk* cur = NULL; |
| 282 Chunk* next; | |
| 283 { | |
| 0 | 284 // if we have more than n chunks, free all of them |
| 285 ThreadCritical tc; | |
| 286 if (_num_chunks > n) { | |
| 287 // free chunks at end of queue, for better locality | |
| 6197 | 288 cur = _first; |
| 0 | 289 for (size_t i = 0; i < (n - 1) && cur != NULL; i++) cur = cur->next(); |
| 290 | |
| 291 if (cur != NULL) { | |
| 6197 | 292 next = cur->next(); |
| 0 | 293 cur->set_next(NULL); |
| 294 cur = next; | |
| 295 | |
| 6197 | 296 _num_chunks = n; |
| 297 } | |
| 298 } | |
| 299 } | |
| 300 | |
| 301 // Free all remaining chunks, outside of ThreadCritical | |
| 302 // to avoid deadlock with NMT | |
| 0 | 303 while(cur != NULL) { |
| 304 next = cur->next(); | |
| 6197 | 305 os::free(cur, mtChunk); |
| 0 | 306 cur = next; |
| 307 } | |
| 308 } | |
| 309 | |
| 310 // Accessors to preallocated pool's | |
| 311 static ChunkPool* large_pool() { assert(_large_pool != NULL, "must be initialized"); return _large_pool; } | |
| 312 static ChunkPool* medium_pool() { assert(_medium_pool != NULL, "must be initialized"); return _medium_pool; } | |
| 313 static ChunkPool* small_pool() { assert(_small_pool != NULL, "must be initialized"); return _small_pool; } | |
| 314 | |
| 315 static void initialize() { | |
| 316 _large_pool = new ChunkPool(Chunk::size + Chunk::aligned_overhead_size()); | |
| 317 _medium_pool = new ChunkPool(Chunk::medium_size + Chunk::aligned_overhead_size()); | |
| 318 _small_pool = new ChunkPool(Chunk::init_size + Chunk::aligned_overhead_size()); | |
| 319 } | |
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320 |
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321 static void clean() { |
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322 enum { BlocksToKeep = 5 }; |
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323 _small_pool->free_all_but(BlocksToKeep); |
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324 _medium_pool->free_all_but(BlocksToKeep); |
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325 _large_pool->free_all_but(BlocksToKeep); |
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326 } |
| 0 | 327 }; |
| 328 | |
| 329 ChunkPool* ChunkPool::_large_pool = NULL; | |
| 330 ChunkPool* ChunkPool::_medium_pool = NULL; | |
| 331 ChunkPool* ChunkPool::_small_pool = NULL; | |
| 332 | |
| 333 void chunkpool_init() { | |
| 334 ChunkPool::initialize(); | |
| 335 } | |
| 336 | |
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337 void |
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338 Chunk::clean_chunk_pool() { |
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339 ChunkPool::clean(); |
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340 } |
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341 |
| 0 | 342 |
| 343 //-------------------------------------------------------------------------------------- | |
| 344 // ChunkPoolCleaner implementation | |
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345 // |
| 0 | 346 |
| 347 class ChunkPoolCleaner : public PeriodicTask { | |
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348 enum { CleaningInterval = 5000 }; // cleaning interval in ms |
| 0 | 349 |
| 350 public: | |
| 351 ChunkPoolCleaner() : PeriodicTask(CleaningInterval) {} | |
| 352 void task() { | |
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353 ChunkPool::clean(); |
| 0 | 354 } |
| 355 }; | |
| 356 | |
| 357 //-------------------------------------------------------------------------------------- | |
| 358 // Chunk implementation | |
| 359 | |
| 360 void* Chunk::operator new(size_t requested_size, size_t length) { | |
| 361 // requested_size is equal to sizeof(Chunk) but in order for the arena | |
| 362 // allocations to come out aligned as expected the size must be aligned | |
| 10135 | 363 // to expected arean alignment. |
| 0 | 364 // expect requested_size but if sizeof(Chunk) doesn't match isn't proper size we must align it. |
| 365 assert(ARENA_ALIGN(requested_size) == aligned_overhead_size(), "Bad alignment"); | |
| 366 size_t bytes = ARENA_ALIGN(requested_size) + length; | |
| 367 switch (length) { | |
| 368 case Chunk::size: return ChunkPool::large_pool()->allocate(bytes); | |
| 369 case Chunk::medium_size: return ChunkPool::medium_pool()->allocate(bytes); | |
| 370 case Chunk::init_size: return ChunkPool::small_pool()->allocate(bytes); | |
| 371 default: { | |
| 6197 | 372 void *p = os::malloc(bytes, mtChunk, CALLER_PC); |
| 0 | 373 if (p == NULL) |
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374 vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "Chunk::new"); |
| 0 | 375 return p; |
| 376 } | |
| 377 } | |
| 378 } | |
| 379 | |
| 380 void Chunk::operator delete(void* p) { | |
| 381 Chunk* c = (Chunk*)p; | |
| 382 switch (c->length()) { | |
| 383 case Chunk::size: ChunkPool::large_pool()->free(c); break; | |
| 384 case Chunk::medium_size: ChunkPool::medium_pool()->free(c); break; | |
| 385 case Chunk::init_size: ChunkPool::small_pool()->free(c); break; | |
| 6197 | 386 default: os::free(c, mtChunk); |
| 0 | 387 } |
| 388 } | |
| 389 | |
| 390 Chunk::Chunk(size_t length) : _len(length) { | |
| 391 _next = NULL; // Chain on the linked list | |
| 392 } | |
| 393 | |
| 394 | |
| 395 void Chunk::chop() { | |
| 396 Chunk *k = this; | |
| 397 while( k ) { | |
| 398 Chunk *tmp = k->next(); | |
| 399 // clear out this chunk (to detect allocation bugs) | |
| 400 if (ZapResourceArea) memset(k->bottom(), badResourceValue, k->length()); | |
| 401 delete k; // Free chunk (was malloc'd) | |
| 402 k = tmp; | |
| 403 } | |
| 404 } | |
| 405 | |
| 406 void Chunk::next_chop() { | |
| 407 _next->chop(); | |
| 408 _next = NULL; | |
| 409 } | |
| 410 | |
| 411 | |
| 412 void Chunk::start_chunk_pool_cleaner_task() { | |
| 413 #ifdef ASSERT | |
| 414 static bool task_created = false; | |
| 415 assert(!task_created, "should not start chuck pool cleaner twice"); | |
| 416 task_created = true; | |
| 417 #endif | |
| 418 ChunkPoolCleaner* cleaner = new ChunkPoolCleaner(); | |
| 419 cleaner->enroll(); | |
| 420 } | |
| 421 | |
| 422 //------------------------------Arena------------------------------------------ | |
| 6197 | 423 NOT_PRODUCT(volatile jint Arena::_instance_count = 0;) |
| 0 | 424 |
| 425 Arena::Arena(size_t init_size) { | |
| 426 size_t round_size = (sizeof (char *)) - 1; | |
| 427 init_size = (init_size+round_size) & ~round_size; | |
| 428 _first = _chunk = new (init_size) Chunk(init_size); | |
| 429 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
| 430 _max = _chunk->top(); | |
| 431 set_size_in_bytes(init_size); | |
| 6197 | 432 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
| 0 | 433 } |
| 434 | |
| 435 Arena::Arena() { | |
| 436 _first = _chunk = new (Chunk::init_size) Chunk(Chunk::init_size); | |
| 437 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
| 438 _max = _chunk->top(); | |
| 439 set_size_in_bytes(Chunk::init_size); | |
| 6197 | 440 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
| 0 | 441 } |
| 442 | |
| 443 Arena *Arena::move_contents(Arena *copy) { | |
| 444 copy->destruct_contents(); | |
| 445 copy->_chunk = _chunk; | |
| 446 copy->_hwm = _hwm; | |
| 447 copy->_max = _max; | |
| 448 copy->_first = _first; | |
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449 |
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450 // workaround rare racing condition, which could double count |
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451 // the arena size by native memory tracking |
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452 size_t size = size_in_bytes(); |
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453 set_size_in_bytes(0); |
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454 copy->set_size_in_bytes(size); |
| 0 | 455 // Destroy original arena |
| 456 reset(); | |
| 457 return copy; // Return Arena with contents | |
| 458 } | |
| 459 | |
| 460 Arena::~Arena() { | |
| 461 destruct_contents(); | |
| 6197 | 462 NOT_PRODUCT(Atomic::dec(&_instance_count);) |
| 463 } | |
| 464 | |
| 465 void* Arena::operator new(size_t size) { | |
| 466 assert(false, "Use dynamic memory type binding"); | |
| 467 return NULL; | |
| 468 } | |
| 469 | |
| 470 void* Arena::operator new (size_t size, const std::nothrow_t& nothrow_constant) { | |
| 471 assert(false, "Use dynamic memory type binding"); | |
| 472 return NULL; | |
| 473 } | |
| 474 | |
| 475 // dynamic memory type binding | |
| 476 void* Arena::operator new(size_t size, MEMFLAGS flags) { | |
| 477 #ifdef ASSERT | |
| 478 void* p = (void*)AllocateHeap(size, flags|otArena, CALLER_PC); | |
| 479 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); | |
| 480 return p; | |
| 481 #else | |
| 482 return (void *) AllocateHeap(size, flags|otArena, CALLER_PC); | |
| 483 #endif | |
| 484 } | |
| 485 | |
| 486 void* Arena::operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags) { | |
| 487 #ifdef ASSERT | |
| 488 void* p = os::malloc(size, flags|otArena, CALLER_PC); | |
| 489 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); | |
| 490 return p; | |
| 491 #else | |
| 492 return os::malloc(size, flags|otArena, CALLER_PC); | |
| 493 #endif | |
| 494 } | |
| 495 | |
| 496 void Arena::operator delete(void* p) { | |
| 497 FreeHeap(p); | |
| 0 | 498 } |
| 499 | |
| 500 // Destroy this arenas contents and reset to empty | |
| 501 void Arena::destruct_contents() { | |
| 502 if (UseMallocOnly && _first != NULL) { | |
| 503 char* end = _first->next() ? _first->top() : _hwm; | |
| 504 free_malloced_objects(_first, _first->bottom(), end, _hwm); | |
| 505 } | |
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506 // reset size before chop to avoid a rare racing condition |
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507 // that can have total arena memory exceed total chunk memory |
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508 set_size_in_bytes(0); |
| 0 | 509 _first->chop(); |
| 510 reset(); | |
| 511 } | |
| 512 | |
| 6197 | 513 // This is high traffic method, but many calls actually don't |
| 514 // change the size | |
| 515 void Arena::set_size_in_bytes(size_t size) { | |
| 516 if (_size_in_bytes != size) { | |
| 517 _size_in_bytes = size; | |
| 518 MemTracker::record_arena_size((address)this, size); | |
| 519 } | |
| 520 } | |
| 0 | 521 |
| 522 // Total of all Chunks in arena | |
| 523 size_t Arena::used() const { | |
| 524 size_t sum = _chunk->length() - (_max-_hwm); // Size leftover in this Chunk | |
| 525 register Chunk *k = _first; | |
| 526 while( k != _chunk) { // Whilst have Chunks in a row | |
| 527 sum += k->length(); // Total size of this Chunk | |
| 528 k = k->next(); // Bump along to next Chunk | |
| 529 } | |
| 530 return sum; // Return total consumed space. | |
| 531 } | |
| 532 | |
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533 void Arena::signal_out_of_memory(size_t sz, const char* whence) const { |
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534 vm_exit_out_of_memory(sz, OOM_MALLOC_ERROR, whence); |
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535 } |
| 0 | 536 |
| 537 // Grow a new Chunk | |
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538 void* Arena::grow(size_t x, AllocFailType alloc_failmode) { |
| 0 | 539 // Get minimal required size. Either real big, or even bigger for giant objs |
| 540 size_t len = MAX2(x, (size_t) Chunk::size); | |
| 541 | |
| 542 Chunk *k = _chunk; // Get filled-up chunk address | |
| 543 _chunk = new (len) Chunk(len); | |
| 544 | |
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545 if (_chunk == NULL) { |
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546 if (alloc_failmode == AllocFailStrategy::EXIT_OOM) { |
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547 signal_out_of_memory(len * Chunk::aligned_overhead_size(), "Arena::grow"); |
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548 } |
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549 return NULL; |
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550 } |
| 0 | 551 if (k) k->set_next(_chunk); // Append new chunk to end of linked list |
| 552 else _first = _chunk; | |
| 553 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
| 554 _max = _chunk->top(); | |
| 555 set_size_in_bytes(size_in_bytes() + len); | |
| 556 void* result = _hwm; | |
| 557 _hwm += x; | |
| 558 return result; | |
| 559 } | |
| 560 | |
| 561 | |
| 562 | |
| 563 // Reallocate storage in Arena. | |
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564 void *Arena::Arealloc(void* old_ptr, size_t old_size, size_t new_size, AllocFailType alloc_failmode) { |
| 0 | 565 assert(new_size >= 0, "bad size"); |
| 566 if (new_size == 0) return NULL; | |
| 567 #ifdef ASSERT | |
| 568 if (UseMallocOnly) { | |
| 569 // always allocate a new object (otherwise we'll free this one twice) | |
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570 char* copy = (char*)Amalloc(new_size, alloc_failmode); |
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571 if (copy == NULL) { |
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572 return NULL; |
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573 } |
| 0 | 574 size_t n = MIN2(old_size, new_size); |
| 575 if (n > 0) memcpy(copy, old_ptr, n); | |
| 576 Afree(old_ptr,old_size); // Mostly done to keep stats accurate | |
| 577 return copy; | |
| 578 } | |
| 579 #endif | |
| 580 char *c_old = (char*)old_ptr; // Handy name | |
| 581 // Stupid fast special case | |
| 582 if( new_size <= old_size ) { // Shrink in-place | |
| 583 if( c_old+old_size == _hwm) // Attempt to free the excess bytes | |
| 584 _hwm = c_old+new_size; // Adjust hwm | |
| 585 return c_old; | |
| 586 } | |
| 587 | |
| 588 // make sure that new_size is legal | |
| 589 size_t corrected_new_size = ARENA_ALIGN(new_size); | |
| 590 | |
| 591 // See if we can resize in-place | |
| 592 if( (c_old+old_size == _hwm) && // Adjusting recent thing | |
| 593 (c_old+corrected_new_size <= _max) ) { // Still fits where it sits | |
| 594 _hwm = c_old+corrected_new_size; // Adjust hwm | |
| 595 return c_old; // Return old pointer | |
| 596 } | |
| 597 | |
| 598 // Oops, got to relocate guts | |
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599 void *new_ptr = Amalloc(new_size, alloc_failmode); |
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600 if (new_ptr == NULL) { |
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601 return NULL; |
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602 } |
| 0 | 603 memcpy( new_ptr, c_old, old_size ); |
| 604 Afree(c_old,old_size); // Mostly done to keep stats accurate | |
| 605 return new_ptr; | |
| 606 } | |
| 607 | |
| 608 | |
| 609 // Determine if pointer belongs to this Arena or not. | |
| 610 bool Arena::contains( const void *ptr ) const { | |
| 611 #ifdef ASSERT | |
| 612 if (UseMallocOnly) { | |
| 613 // really slow, but not easy to make fast | |
| 614 if (_chunk == NULL) return false; | |
| 615 char** bottom = (char**)_chunk->bottom(); | |
| 616 for (char** p = (char**)_hwm - 1; p >= bottom; p--) { | |
| 617 if (*p == ptr) return true; | |
| 618 } | |
| 619 for (Chunk *c = _first; c != NULL; c = c->next()) { | |
| 620 if (c == _chunk) continue; // current chunk has been processed | |
| 621 char** bottom = (char**)c->bottom(); | |
| 622 for (char** p = (char**)c->top() - 1; p >= bottom; p--) { | |
| 623 if (*p == ptr) return true; | |
| 624 } | |
| 625 } | |
| 626 return false; | |
| 627 } | |
| 628 #endif | |
| 629 if( (void*)_chunk->bottom() <= ptr && ptr < (void*)_hwm ) | |
| 630 return true; // Check for in this chunk | |
| 631 for (Chunk *c = _first; c; c = c->next()) { | |
| 632 if (c == _chunk) continue; // current chunk has been processed | |
| 633 if ((void*)c->bottom() <= ptr && ptr < (void*)c->top()) { | |
| 634 return true; // Check for every chunk in Arena | |
| 635 } | |
| 636 } | |
| 637 return false; // Not in any Chunk, so not in Arena | |
| 638 } | |
| 639 | |
| 640 | |
| 641 #ifdef ASSERT | |
| 642 void* Arena::malloc(size_t size) { | |
| 643 assert(UseMallocOnly, "shouldn't call"); | |
| 644 // use malloc, but save pointer in res. area for later freeing | |
| 645 char** save = (char**)internal_malloc_4(sizeof(char*)); | |
| 6197 | 646 return (*save = (char*)os::malloc(size, mtChunk)); |
| 0 | 647 } |
| 648 | |
| 649 // for debugging with UseMallocOnly | |
| 650 void* Arena::internal_malloc_4(size_t x) { | |
| 651 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); | |
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652 check_for_overflow(x, "Arena::internal_malloc_4"); |
| 0 | 653 if (_hwm + x > _max) { |
| 654 return grow(x); | |
| 655 } else { | |
| 656 char *old = _hwm; | |
| 657 _hwm += x; | |
| 658 return old; | |
| 659 } | |
| 660 } | |
| 661 #endif | |
| 662 | |
| 663 | |
| 664 //-------------------------------------------------------------------------------------- | |
| 665 // Non-product code | |
| 666 | |
| 667 #ifndef PRODUCT | |
| 668 // The global operator new should never be called since it will usually indicate | |
| 669 // a memory leak. Use CHeapObj as the base class of such objects to make it explicit | |
| 670 // that they're allocated on the C heap. | |
| 671 // Commented out in product version to avoid conflicts with third-party C++ native code. | |
| 10135 | 672 // %% note this is causing a problem on solaris debug build. the global |
| 673 // new is being called from jdk source and causing data corruption. | |
| 674 // src/share/native/sun/awt/font/fontmanager/textcache/hsMemory.cpp::hsSoftNew | |
| 675 // define CATCH_OPERATOR_NEW_USAGE if you want to use this. | |
| 676 #ifdef CATCH_OPERATOR_NEW_USAGE | |
| 0 | 677 void* operator new(size_t size){ |
| 10135 | 678 static bool warned = false; |
| 679 if (!warned && warn_new_operator) | |
| 680 warning("should not call global (default) operator new"); | |
| 681 warned = true; | |
| 682 return (void *) AllocateHeap(size, "global operator new"); | |
| 0 | 683 } |
| 10135 | 684 #endif |
| 0 | 685 |
| 686 void AllocatedObj::print() const { print_on(tty); } | |
| 687 void AllocatedObj::print_value() const { print_value_on(tty); } | |
| 688 | |
| 689 void AllocatedObj::print_on(outputStream* st) const { | |
| 690 st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", this); | |
| 691 } | |
| 692 | |
| 693 void AllocatedObj::print_value_on(outputStream* st) const { | |
| 694 st->print("AllocatedObj(" INTPTR_FORMAT ")", this); | |
| 695 } | |
| 696 | |
| 2250 | 697 julong Arena::_bytes_allocated = 0; |
| 698 | |
| 699 void Arena::inc_bytes_allocated(size_t x) { inc_stat_counter(&_bytes_allocated, x); } | |
| 0 | 700 |
| 701 AllocStats::AllocStats() { | |
| 2250 | 702 start_mallocs = os::num_mallocs; |
| 703 start_frees = os::num_frees; | |
| 0 | 704 start_malloc_bytes = os::alloc_bytes; |
| 2250 | 705 start_mfree_bytes = os::free_bytes; |
| 706 start_res_bytes = Arena::_bytes_allocated; | |
| 0 | 707 } |
| 708 | |
| 2250 | 709 julong AllocStats::num_mallocs() { return os::num_mallocs - start_mallocs; } |
| 710 julong AllocStats::alloc_bytes() { return os::alloc_bytes - start_malloc_bytes; } | |
| 711 julong AllocStats::num_frees() { return os::num_frees - start_frees; } | |
| 712 julong AllocStats::free_bytes() { return os::free_bytes - start_mfree_bytes; } | |
| 713 julong AllocStats::resource_bytes() { return Arena::_bytes_allocated - start_res_bytes; } | |
| 0 | 714 void AllocStats::print() { |
| 2250 | 715 tty->print_cr(UINT64_FORMAT " mallocs (" UINT64_FORMAT "MB), " |
| 716 UINT64_FORMAT" frees (" UINT64_FORMAT "MB), " UINT64_FORMAT "MB resrc", | |
| 717 num_mallocs(), alloc_bytes()/M, num_frees(), free_bytes()/M, resource_bytes()/M); | |
| 0 | 718 } |
| 719 | |
| 720 | |
| 721 // debugging code | |
| 722 inline void Arena::free_all(char** start, char** end) { | |
| 723 for (char** p = start; p < end; p++) if (*p) os::free(*p); | |
| 724 } | |
| 725 | |
| 726 void Arena::free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) { | |
| 727 assert(UseMallocOnly, "should not call"); | |
| 728 // free all objects malloced since resource mark was created; resource area | |
| 729 // contains their addresses | |
| 730 if (chunk->next()) { | |
| 731 // this chunk is full, and some others too | |
| 732 for (Chunk* c = chunk->next(); c != NULL; c = c->next()) { | |
| 733 char* top = c->top(); | |
| 734 if (c->next() == NULL) { | |
| 735 top = hwm2; // last junk is only used up to hwm2 | |
| 736 assert(c->contains(hwm2), "bad hwm2"); | |
| 737 } | |
| 738 free_all((char**)c->bottom(), (char**)top); | |
| 739 } | |
| 740 assert(chunk->contains(hwm), "bad hwm"); | |
| 741 assert(chunk->contains(max), "bad max"); | |
| 742 free_all((char**)hwm, (char**)max); | |
| 743 } else { | |
| 744 // this chunk was partially used | |
| 745 assert(chunk->contains(hwm), "bad hwm"); | |
| 746 assert(chunk->contains(hwm2), "bad hwm2"); | |
| 747 free_all((char**)hwm, (char**)hwm2); | |
| 748 } | |
| 749 } | |
| 750 | |
| 751 | |
| 752 ReallocMark::ReallocMark() { | |
| 753 #ifdef ASSERT | |
| 754 Thread *thread = ThreadLocalStorage::get_thread_slow(); | |
| 755 _nesting = thread->resource_area()->nesting(); | |
| 756 #endif | |
| 757 } | |
| 758 | |
| 759 void ReallocMark::check() { | |
| 760 #ifdef ASSERT | |
| 761 if (_nesting != Thread::current()->resource_area()->nesting()) { | |
| 762 fatal("allocation bug: array could grow within nested ResourceMark"); | |
| 763 } | |
| 764 #endif | |
| 765 } | |
| 766 | |
| 767 #endif // Non-product |