Mercurial > hg > truffle
annotate src/share/vm/memory/allocation.cpp @ 6182:765ee2d1674b
7157365: jruby/bench.bench_timeout crashes with JVM internal error
Reviewed-by: jrose, kvn
| author | twisti |
|---|---|
| date | Mon, 18 Jun 2012 15:17:30 -0700 |
| parents | f08d439fab8c |
| children | d2a62e0f25eb |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2250 | 2 * Copyright (c) 1997, 2011, 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" | |
| 28 #include "memory/resourceArea.hpp" | |
| 29 #include "runtime/os.hpp" | |
| 30 #include "runtime/task.hpp" | |
| 31 #include "runtime/threadCritical.hpp" | |
| 32 #include "utilities/ostream.hpp" | |
| 33 #ifdef TARGET_OS_FAMILY_linux | |
| 34 # include "os_linux.inline.hpp" | |
| 35 #endif | |
| 36 #ifdef TARGET_OS_FAMILY_solaris | |
| 37 # include "os_solaris.inline.hpp" | |
| 38 #endif | |
| 39 #ifdef TARGET_OS_FAMILY_windows | |
| 40 # include "os_windows.inline.hpp" | |
| 41 #endif | |
| 3960 | 42 #ifdef TARGET_OS_FAMILY_bsd |
| 43 # include "os_bsd.inline.hpp" | |
| 44 #endif | |
| 0 | 45 |
| 46 void* CHeapObj::operator new(size_t size){ | |
| 47 return (void *) AllocateHeap(size, "CHeapObj-new"); | |
| 48 } | |
| 49 | |
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50 void* CHeapObj::operator new (size_t size, const std::nothrow_t& nothrow_constant) { |
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51 char* p = (char*) os::malloc(size); |
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52 #ifdef ASSERT |
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53 if (PrintMallocFree) trace_heap_malloc(size, "CHeapObj-new", p); |
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54 #endif |
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55 return p; |
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56 } |
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57 |
| 0 | 58 void CHeapObj::operator delete(void* p){ |
| 59 FreeHeap(p); | |
| 60 } | |
| 61 | |
| 62 void* StackObj::operator new(size_t size) { ShouldNotCallThis(); return 0; }; | |
| 63 void StackObj::operator delete(void* p) { ShouldNotCallThis(); }; | |
| 64 void* _ValueObj::operator new(size_t size) { ShouldNotCallThis(); return 0; }; | |
| 65 void _ValueObj::operator delete(void* p) { ShouldNotCallThis(); }; | |
| 66 | |
| 67 void* ResourceObj::operator new(size_t size, allocation_type type) { | |
| 68 address res; | |
| 69 switch (type) { | |
| 70 case C_HEAP: | |
| 71 res = (address)AllocateHeap(size, "C_Heap: ResourceOBJ"); | |
| 1685 | 72 DEBUG_ONLY(set_allocation_type(res, C_HEAP);) |
| 0 | 73 break; |
| 74 case RESOURCE_AREA: | |
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75 // new(size) sets allocation type RESOURCE_AREA. |
| 0 | 76 res = (address)operator new(size); |
| 77 break; | |
| 78 default: | |
| 79 ShouldNotReachHere(); | |
| 80 } | |
| 81 return res; | |
| 82 } | |
| 83 | |
| 84 void ResourceObj::operator delete(void* p) { | |
| 85 assert(((ResourceObj *)p)->allocated_on_C_heap(), | |
| 86 "delete only allowed for C_HEAP objects"); | |
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87 DEBUG_ONLY(((ResourceObj *)p)->_allocation_t[0] = (uintptr_t)badHeapOopVal;) |
| 0 | 88 FreeHeap(p); |
| 89 } | |
| 90 | |
| 1685 | 91 #ifdef ASSERT |
| 92 void ResourceObj::set_allocation_type(address res, allocation_type type) { | |
| 93 // Set allocation type in the resource object | |
| 94 uintptr_t allocation = (uintptr_t)res; | |
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95 assert((allocation & allocation_mask) == 0, "address should be aligned to 4 bytes at least"); |
| 1685 | 96 assert(type <= allocation_mask, "incorrect allocation type"); |
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97 ResourceObj* resobj = (ResourceObj *)res; |
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98 resobj->_allocation_t[0] = ~(allocation + type); |
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99 if (type != STACK_OR_EMBEDDED) { |
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100 // Called from operator new() and CollectionSetChooser(), |
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101 // set verification value. |
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102 resobj->_allocation_t[1] = (uintptr_t)&(resobj->_allocation_t[1]) + type; |
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103 } |
| 1685 | 104 } |
| 105 | |
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106 ResourceObj::allocation_type ResourceObj::get_allocation_type() const { |
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107 assert(~(_allocation_t[0] | allocation_mask) == (uintptr_t)this, "lost resource object"); |
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108 return (allocation_type)((~_allocation_t[0]) & allocation_mask); |
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109 } |
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110 |
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111 bool ResourceObj::is_type_set() const { |
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112 allocation_type type = (allocation_type)(_allocation_t[1] & allocation_mask); |
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113 return get_allocation_type() == type && |
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114 (_allocation_t[1] - type) == (uintptr_t)(&_allocation_t[1]); |
| 1685 | 115 } |
| 116 | |
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117 ResourceObj::ResourceObj() { // default constructor |
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118 if (~(_allocation_t[0] | allocation_mask) != (uintptr_t)this) { |
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119 // Operator new() is not called for allocations |
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120 // on stack and for embedded objects. |
| 1685 | 121 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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122 } else if (allocated_on_stack()) { // STACK_OR_EMBEDDED |
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123 // For some reason we got a value which resembles |
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124 // an embedded or stack object (operator new() does not |
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125 // set such type). Keep it since it is valid value |
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126 // (even if it was garbage). |
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127 // Ignore garbage in other fields. |
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128 } else if (is_type_set()) { |
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129 // Operator new() was called and type was set. |
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130 assert(!allocated_on_stack(), |
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131 err_msg("not embedded or stack, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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132 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
| 1685 | 133 } else { |
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134 // Operator new() was not called. |
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135 // Assume that it is embedded or stack object. |
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136 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
| 1685 | 137 } |
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138 _allocation_t[1] = 0; // Zap verification value |
| 1685 | 139 } |
| 140 | |
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141 ResourceObj::ResourceObj(const ResourceObj& r) { // default copy constructor |
| 1685 | 142 // Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream. |
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143 // Note: garbage may resembles valid value. |
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144 assert(~(_allocation_t[0] | allocation_mask) != (uintptr_t)this || !is_type_set(), |
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145 err_msg("embedded or stack only, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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146 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
| 1685 | 147 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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148 _allocation_t[1] = 0; // Zap verification value |
| 1685 | 149 } |
| 150 | |
| 151 ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment | |
| 152 // Used in InlineTree::ok_to_inline() for WarmCallInfo. | |
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153 assert(allocated_on_stack(), |
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154 err_msg("copy only into local, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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155 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
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156 // Keep current _allocation_t value; |
| 1685 | 157 return *this; |
| 158 } | |
| 159 | |
| 160 ResourceObj::~ResourceObj() { | |
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161 // allocated_on_C_heap() also checks that encoded (in _allocation) address == this. |
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162 if (!allocated_on_C_heap()) { // ResourceObj::delete() will zap _allocation for C_heap. |
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163 _allocation_t[0] = (uintptr_t)badHeapOopVal; // zap type |
| 1685 | 164 } |
| 165 } | |
| 166 #endif // ASSERT | |
| 167 | |
| 168 | |
| 0 | 169 void trace_heap_malloc(size_t size, const char* name, void* p) { |
| 170 // A lock is not needed here - tty uses a lock internally | |
| 2250 | 171 tty->print_cr("Heap malloc " INTPTR_FORMAT " " SIZE_FORMAT " %s", p, size, name == NULL ? "" : name); |
| 0 | 172 } |
| 173 | |
| 174 | |
| 175 void trace_heap_free(void* p) { | |
| 176 // A lock is not needed here - tty uses a lock internally | |
| 177 tty->print_cr("Heap free " INTPTR_FORMAT, p); | |
| 178 } | |
| 179 | |
| 180 bool warn_new_operator = false; // see vm_main | |
| 181 | |
| 182 //-------------------------------------------------------------------------------------- | |
| 183 // ChunkPool implementation | |
| 184 | |
| 185 // MT-safe pool of chunks to reduce malloc/free thrashing | |
| 186 // NB: not using Mutex because pools are used before Threads are initialized | |
| 187 class ChunkPool { | |
| 188 Chunk* _first; // first cached Chunk; its first word points to next chunk | |
| 189 size_t _num_chunks; // number of unused chunks in pool | |
| 190 size_t _num_used; // number of chunks currently checked out | |
| 191 const size_t _size; // size of each chunk (must be uniform) | |
| 192 | |
| 193 // Our three static pools | |
| 194 static ChunkPool* _large_pool; | |
| 195 static ChunkPool* _medium_pool; | |
| 196 static ChunkPool* _small_pool; | |
| 197 | |
| 198 // return first element or null | |
| 199 void* get_first() { | |
| 200 Chunk* c = _first; | |
| 201 if (_first) { | |
| 202 _first = _first->next(); | |
| 203 _num_chunks--; | |
| 204 } | |
| 205 return c; | |
| 206 } | |
| 207 | |
| 208 public: | |
| 209 // All chunks in a ChunkPool has the same size | |
| 210 ChunkPool(size_t size) : _size(size) { _first = NULL; _num_chunks = _num_used = 0; } | |
| 211 | |
| 212 // Allocate a new chunk from the pool (might expand the pool) | |
| 213 void* allocate(size_t bytes) { | |
| 214 assert(bytes == _size, "bad size"); | |
| 215 void* p = NULL; | |
| 216 { ThreadCritical tc; | |
| 217 _num_used++; | |
| 218 p = get_first(); | |
| 219 if (p == NULL) p = os::malloc(bytes); | |
| 220 } | |
| 221 if (p == NULL) | |
| 222 vm_exit_out_of_memory(bytes, "ChunkPool::allocate"); | |
| 223 | |
| 224 return p; | |
| 225 } | |
| 226 | |
| 227 // Return a chunk to the pool | |
| 228 void free(Chunk* chunk) { | |
| 229 assert(chunk->length() + Chunk::aligned_overhead_size() == _size, "bad size"); | |
| 230 ThreadCritical tc; | |
| 231 _num_used--; | |
| 232 | |
| 233 // Add chunk to list | |
| 234 chunk->set_next(_first); | |
| 235 _first = chunk; | |
| 236 _num_chunks++; | |
| 237 } | |
| 238 | |
| 239 // Prune the pool | |
| 240 void free_all_but(size_t n) { | |
| 241 // if we have more than n chunks, free all of them | |
| 242 ThreadCritical tc; | |
| 243 if (_num_chunks > n) { | |
| 244 // free chunks at end of queue, for better locality | |
| 245 Chunk* cur = _first; | |
| 246 for (size_t i = 0; i < (n - 1) && cur != NULL; i++) cur = cur->next(); | |
| 247 | |
| 248 if (cur != NULL) { | |
| 249 Chunk* next = cur->next(); | |
| 250 cur->set_next(NULL); | |
| 251 cur = next; | |
| 252 | |
| 253 // Free all remaining chunks | |
| 254 while(cur != NULL) { | |
| 255 next = cur->next(); | |
| 256 os::free(cur); | |
| 257 _num_chunks--; | |
| 258 cur = next; | |
| 259 } | |
| 260 } | |
| 261 } | |
| 262 } | |
| 263 | |
| 264 // Accessors to preallocated pool's | |
| 265 static ChunkPool* large_pool() { assert(_large_pool != NULL, "must be initialized"); return _large_pool; } | |
| 266 static ChunkPool* medium_pool() { assert(_medium_pool != NULL, "must be initialized"); return _medium_pool; } | |
| 267 static ChunkPool* small_pool() { assert(_small_pool != NULL, "must be initialized"); return _small_pool; } | |
| 268 | |
| 269 static void initialize() { | |
| 270 _large_pool = new ChunkPool(Chunk::size + Chunk::aligned_overhead_size()); | |
| 271 _medium_pool = new ChunkPool(Chunk::medium_size + Chunk::aligned_overhead_size()); | |
| 272 _small_pool = new ChunkPool(Chunk::init_size + Chunk::aligned_overhead_size()); | |
| 273 } | |
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274 |
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275 static void clean() { |
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276 enum { BlocksToKeep = 5 }; |
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277 _small_pool->free_all_but(BlocksToKeep); |
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278 _medium_pool->free_all_but(BlocksToKeep); |
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279 _large_pool->free_all_but(BlocksToKeep); |
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280 } |
| 0 | 281 }; |
| 282 | |
| 283 ChunkPool* ChunkPool::_large_pool = NULL; | |
| 284 ChunkPool* ChunkPool::_medium_pool = NULL; | |
| 285 ChunkPool* ChunkPool::_small_pool = NULL; | |
| 286 | |
| 287 void chunkpool_init() { | |
| 288 ChunkPool::initialize(); | |
| 289 } | |
| 290 | |
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291 void |
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292 Chunk::clean_chunk_pool() { |
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293 ChunkPool::clean(); |
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294 } |
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295 |
| 0 | 296 |
| 297 //-------------------------------------------------------------------------------------- | |
| 298 // ChunkPoolCleaner implementation | |
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299 // |
| 0 | 300 |
| 301 class ChunkPoolCleaner : public PeriodicTask { | |
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302 enum { CleaningInterval = 5000 }; // cleaning interval in ms |
| 0 | 303 |
| 304 public: | |
| 305 ChunkPoolCleaner() : PeriodicTask(CleaningInterval) {} | |
| 306 void task() { | |
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307 ChunkPool::clean(); |
| 0 | 308 } |
| 309 }; | |
| 310 | |
| 311 //-------------------------------------------------------------------------------------- | |
| 312 // Chunk implementation | |
| 313 | |
| 314 void* Chunk::operator new(size_t requested_size, size_t length) { | |
| 315 // requested_size is equal to sizeof(Chunk) but in order for the arena | |
| 316 // allocations to come out aligned as expected the size must be aligned | |
| 317 // to expected arean alignment. | |
| 318 // expect requested_size but if sizeof(Chunk) doesn't match isn't proper size we must align it. | |
| 319 assert(ARENA_ALIGN(requested_size) == aligned_overhead_size(), "Bad alignment"); | |
| 320 size_t bytes = ARENA_ALIGN(requested_size) + length; | |
| 321 switch (length) { | |
| 322 case Chunk::size: return ChunkPool::large_pool()->allocate(bytes); | |
| 323 case Chunk::medium_size: return ChunkPool::medium_pool()->allocate(bytes); | |
| 324 case Chunk::init_size: return ChunkPool::small_pool()->allocate(bytes); | |
| 325 default: { | |
| 326 void *p = os::malloc(bytes); | |
| 327 if (p == NULL) | |
| 328 vm_exit_out_of_memory(bytes, "Chunk::new"); | |
| 329 return p; | |
| 330 } | |
| 331 } | |
| 332 } | |
| 333 | |
| 334 void Chunk::operator delete(void* p) { | |
| 335 Chunk* c = (Chunk*)p; | |
| 336 switch (c->length()) { | |
| 337 case Chunk::size: ChunkPool::large_pool()->free(c); break; | |
| 338 case Chunk::medium_size: ChunkPool::medium_pool()->free(c); break; | |
| 339 case Chunk::init_size: ChunkPool::small_pool()->free(c); break; | |
| 340 default: os::free(c); | |
| 341 } | |
| 342 } | |
| 343 | |
| 344 Chunk::Chunk(size_t length) : _len(length) { | |
| 345 _next = NULL; // Chain on the linked list | |
| 346 } | |
| 347 | |
| 348 | |
| 349 void Chunk::chop() { | |
| 350 Chunk *k = this; | |
| 351 while( k ) { | |
| 352 Chunk *tmp = k->next(); | |
| 353 // clear out this chunk (to detect allocation bugs) | |
| 354 if (ZapResourceArea) memset(k->bottom(), badResourceValue, k->length()); | |
| 355 delete k; // Free chunk (was malloc'd) | |
| 356 k = tmp; | |
| 357 } | |
| 358 } | |
| 359 | |
| 360 void Chunk::next_chop() { | |
| 361 _next->chop(); | |
| 362 _next = NULL; | |
| 363 } | |
| 364 | |
| 365 | |
| 366 void Chunk::start_chunk_pool_cleaner_task() { | |
| 367 #ifdef ASSERT | |
| 368 static bool task_created = false; | |
| 369 assert(!task_created, "should not start chuck pool cleaner twice"); | |
| 370 task_created = true; | |
| 371 #endif | |
| 372 ChunkPoolCleaner* cleaner = new ChunkPoolCleaner(); | |
| 373 cleaner->enroll(); | |
| 374 } | |
| 375 | |
| 376 //------------------------------Arena------------------------------------------ | |
| 377 | |
| 378 Arena::Arena(size_t init_size) { | |
| 379 size_t round_size = (sizeof (char *)) - 1; | |
| 380 init_size = (init_size+round_size) & ~round_size; | |
| 381 _first = _chunk = new (init_size) Chunk(init_size); | |
| 382 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
| 383 _max = _chunk->top(); | |
| 384 set_size_in_bytes(init_size); | |
| 385 } | |
| 386 | |
| 387 Arena::Arena() { | |
| 388 _first = _chunk = new (Chunk::init_size) Chunk(Chunk::init_size); | |
| 389 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
| 390 _max = _chunk->top(); | |
| 391 set_size_in_bytes(Chunk::init_size); | |
| 392 } | |
| 393 | |
| 394 Arena::Arena(Arena *a) : _chunk(a->_chunk), _hwm(a->_hwm), _max(a->_max), _first(a->_first) { | |
| 395 set_size_in_bytes(a->size_in_bytes()); | |
| 396 } | |
| 397 | |
| 398 Arena *Arena::move_contents(Arena *copy) { | |
| 399 copy->destruct_contents(); | |
| 400 copy->_chunk = _chunk; | |
| 401 copy->_hwm = _hwm; | |
| 402 copy->_max = _max; | |
| 403 copy->_first = _first; | |
| 404 copy->set_size_in_bytes(size_in_bytes()); | |
| 405 // Destroy original arena | |
| 406 reset(); | |
| 407 return copy; // Return Arena with contents | |
| 408 } | |
| 409 | |
| 410 Arena::~Arena() { | |
| 411 destruct_contents(); | |
| 412 } | |
| 413 | |
| 414 // Destroy this arenas contents and reset to empty | |
| 415 void Arena::destruct_contents() { | |
| 416 if (UseMallocOnly && _first != NULL) { | |
| 417 char* end = _first->next() ? _first->top() : _hwm; | |
| 418 free_malloced_objects(_first, _first->bottom(), end, _hwm); | |
| 419 } | |
| 420 _first->chop(); | |
| 421 reset(); | |
| 422 } | |
| 423 | |
| 424 | |
| 425 // Total of all Chunks in arena | |
| 426 size_t Arena::used() const { | |
| 427 size_t sum = _chunk->length() - (_max-_hwm); // Size leftover in this Chunk | |
| 428 register Chunk *k = _first; | |
| 429 while( k != _chunk) { // Whilst have Chunks in a row | |
| 430 sum += k->length(); // Total size of this Chunk | |
| 431 k = k->next(); // Bump along to next Chunk | |
| 432 } | |
| 433 return sum; // Return total consumed space. | |
| 434 } | |
| 435 | |
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436 void Arena::signal_out_of_memory(size_t sz, const char* whence) const { |
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437 vm_exit_out_of_memory(sz, whence); |
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438 } |
| 0 | 439 |
| 440 // Grow a new Chunk | |
| 441 void* Arena::grow( size_t x ) { | |
| 442 // Get minimal required size. Either real big, or even bigger for giant objs | |
| 443 size_t len = MAX2(x, (size_t) Chunk::size); | |
| 444 | |
| 445 Chunk *k = _chunk; // Get filled-up chunk address | |
| 446 _chunk = new (len) Chunk(len); | |
| 447 | |
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448 if (_chunk == NULL) { |
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449 signal_out_of_memory(len * Chunk::aligned_overhead_size(), "Arena::grow"); |
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450 } |
| 0 | 451 |
| 452 if (k) k->set_next(_chunk); // Append new chunk to end of linked list | |
| 453 else _first = _chunk; | |
| 454 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
| 455 _max = _chunk->top(); | |
| 456 set_size_in_bytes(size_in_bytes() + len); | |
| 457 void* result = _hwm; | |
| 458 _hwm += x; | |
| 459 return result; | |
| 460 } | |
| 461 | |
| 462 | |
| 463 | |
| 464 // Reallocate storage in Arena. | |
| 465 void *Arena::Arealloc(void* old_ptr, size_t old_size, size_t new_size) { | |
| 466 assert(new_size >= 0, "bad size"); | |
| 467 if (new_size == 0) return NULL; | |
| 468 #ifdef ASSERT | |
| 469 if (UseMallocOnly) { | |
| 470 // always allocate a new object (otherwise we'll free this one twice) | |
| 471 char* copy = (char*)Amalloc(new_size); | |
| 472 size_t n = MIN2(old_size, new_size); | |
| 473 if (n > 0) memcpy(copy, old_ptr, n); | |
| 474 Afree(old_ptr,old_size); // Mostly done to keep stats accurate | |
| 475 return copy; | |
| 476 } | |
| 477 #endif | |
| 478 char *c_old = (char*)old_ptr; // Handy name | |
| 479 // Stupid fast special case | |
| 480 if( new_size <= old_size ) { // Shrink in-place | |
| 481 if( c_old+old_size == _hwm) // Attempt to free the excess bytes | |
| 482 _hwm = c_old+new_size; // Adjust hwm | |
| 483 return c_old; | |
| 484 } | |
| 485 | |
| 486 // make sure that new_size is legal | |
| 487 size_t corrected_new_size = ARENA_ALIGN(new_size); | |
| 488 | |
| 489 // See if we can resize in-place | |
| 490 if( (c_old+old_size == _hwm) && // Adjusting recent thing | |
| 491 (c_old+corrected_new_size <= _max) ) { // Still fits where it sits | |
| 492 _hwm = c_old+corrected_new_size; // Adjust hwm | |
| 493 return c_old; // Return old pointer | |
| 494 } | |
| 495 | |
| 496 // Oops, got to relocate guts | |
| 497 void *new_ptr = Amalloc(new_size); | |
| 498 memcpy( new_ptr, c_old, old_size ); | |
| 499 Afree(c_old,old_size); // Mostly done to keep stats accurate | |
| 500 return new_ptr; | |
| 501 } | |
| 502 | |
| 503 | |
| 504 // Determine if pointer belongs to this Arena or not. | |
| 505 bool Arena::contains( const void *ptr ) const { | |
| 506 #ifdef ASSERT | |
| 507 if (UseMallocOnly) { | |
| 508 // really slow, but not easy to make fast | |
| 509 if (_chunk == NULL) return false; | |
| 510 char** bottom = (char**)_chunk->bottom(); | |
| 511 for (char** p = (char**)_hwm - 1; p >= bottom; p--) { | |
| 512 if (*p == ptr) return true; | |
| 513 } | |
| 514 for (Chunk *c = _first; c != NULL; c = c->next()) { | |
| 515 if (c == _chunk) continue; // current chunk has been processed | |
| 516 char** bottom = (char**)c->bottom(); | |
| 517 for (char** p = (char**)c->top() - 1; p >= bottom; p--) { | |
| 518 if (*p == ptr) return true; | |
| 519 } | |
| 520 } | |
| 521 return false; | |
| 522 } | |
| 523 #endif | |
| 524 if( (void*)_chunk->bottom() <= ptr && ptr < (void*)_hwm ) | |
| 525 return true; // Check for in this chunk | |
| 526 for (Chunk *c = _first; c; c = c->next()) { | |
| 527 if (c == _chunk) continue; // current chunk has been processed | |
| 528 if ((void*)c->bottom() <= ptr && ptr < (void*)c->top()) { | |
| 529 return true; // Check for every chunk in Arena | |
| 530 } | |
| 531 } | |
| 532 return false; // Not in any Chunk, so not in Arena | |
| 533 } | |
| 534 | |
| 535 | |
| 536 #ifdef ASSERT | |
| 537 void* Arena::malloc(size_t size) { | |
| 538 assert(UseMallocOnly, "shouldn't call"); | |
| 539 // use malloc, but save pointer in res. area for later freeing | |
| 540 char** save = (char**)internal_malloc_4(sizeof(char*)); | |
| 541 return (*save = (char*)os::malloc(size)); | |
| 542 } | |
| 543 | |
| 544 // for debugging with UseMallocOnly | |
| 545 void* Arena::internal_malloc_4(size_t x) { | |
| 546 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); | |
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547 check_for_overflow(x, "Arena::internal_malloc_4"); |
| 0 | 548 if (_hwm + x > _max) { |
| 549 return grow(x); | |
| 550 } else { | |
| 551 char *old = _hwm; | |
| 552 _hwm += x; | |
| 553 return old; | |
| 554 } | |
| 555 } | |
| 556 #endif | |
| 557 | |
| 558 | |
| 559 //-------------------------------------------------------------------------------------- | |
| 560 // Non-product code | |
| 561 | |
| 562 #ifndef PRODUCT | |
| 563 // The global operator new should never be called since it will usually indicate | |
| 564 // a memory leak. Use CHeapObj as the base class of such objects to make it explicit | |
| 565 // that they're allocated on the C heap. | |
| 566 // Commented out in product version to avoid conflicts with third-party C++ native code. | |
| 567 // %% note this is causing a problem on solaris debug build. the global | |
| 568 // new is being called from jdk source and causing data corruption. | |
| 569 // src/share/native/sun/awt/font/fontmanager/textcache/hsMemory.cpp::hsSoftNew | |
| 570 // define CATCH_OPERATOR_NEW_USAGE if you want to use this. | |
| 571 #ifdef CATCH_OPERATOR_NEW_USAGE | |
| 572 void* operator new(size_t size){ | |
| 573 static bool warned = false; | |
| 574 if (!warned && warn_new_operator) | |
| 575 warning("should not call global (default) operator new"); | |
| 576 warned = true; | |
| 577 return (void *) AllocateHeap(size, "global operator new"); | |
| 578 } | |
| 579 #endif | |
| 580 | |
| 581 void AllocatedObj::print() const { print_on(tty); } | |
| 582 void AllocatedObj::print_value() const { print_value_on(tty); } | |
| 583 | |
| 584 void AllocatedObj::print_on(outputStream* st) const { | |
| 585 st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", this); | |
| 586 } | |
| 587 | |
| 588 void AllocatedObj::print_value_on(outputStream* st) const { | |
| 589 st->print("AllocatedObj(" INTPTR_FORMAT ")", this); | |
| 590 } | |
| 591 | |
| 2250 | 592 julong Arena::_bytes_allocated = 0; |
| 593 | |
| 594 void Arena::inc_bytes_allocated(size_t x) { inc_stat_counter(&_bytes_allocated, x); } | |
| 0 | 595 |
| 596 AllocStats::AllocStats() { | |
| 2250 | 597 start_mallocs = os::num_mallocs; |
| 598 start_frees = os::num_frees; | |
| 0 | 599 start_malloc_bytes = os::alloc_bytes; |
| 2250 | 600 start_mfree_bytes = os::free_bytes; |
| 601 start_res_bytes = Arena::_bytes_allocated; | |
| 0 | 602 } |
| 603 | |
| 2250 | 604 julong AllocStats::num_mallocs() { return os::num_mallocs - start_mallocs; } |
| 605 julong AllocStats::alloc_bytes() { return os::alloc_bytes - start_malloc_bytes; } | |
| 606 julong AllocStats::num_frees() { return os::num_frees - start_frees; } | |
| 607 julong AllocStats::free_bytes() { return os::free_bytes - start_mfree_bytes; } | |
| 608 julong AllocStats::resource_bytes() { return Arena::_bytes_allocated - start_res_bytes; } | |
| 0 | 609 void AllocStats::print() { |
| 2250 | 610 tty->print_cr(UINT64_FORMAT " mallocs (" UINT64_FORMAT "MB), " |
| 611 UINT64_FORMAT" frees (" UINT64_FORMAT "MB), " UINT64_FORMAT "MB resrc", | |
| 612 num_mallocs(), alloc_bytes()/M, num_frees(), free_bytes()/M, resource_bytes()/M); | |
| 0 | 613 } |
| 614 | |
| 615 | |
| 616 // debugging code | |
| 617 inline void Arena::free_all(char** start, char** end) { | |
| 618 for (char** p = start; p < end; p++) if (*p) os::free(*p); | |
| 619 } | |
| 620 | |
| 621 void Arena::free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) { | |
| 622 assert(UseMallocOnly, "should not call"); | |
| 623 // free all objects malloced since resource mark was created; resource area | |
| 624 // contains their addresses | |
| 625 if (chunk->next()) { | |
| 626 // this chunk is full, and some others too | |
| 627 for (Chunk* c = chunk->next(); c != NULL; c = c->next()) { | |
| 628 char* top = c->top(); | |
| 629 if (c->next() == NULL) { | |
| 630 top = hwm2; // last junk is only used up to hwm2 | |
| 631 assert(c->contains(hwm2), "bad hwm2"); | |
| 632 } | |
| 633 free_all((char**)c->bottom(), (char**)top); | |
| 634 } | |
| 635 assert(chunk->contains(hwm), "bad hwm"); | |
| 636 assert(chunk->contains(max), "bad max"); | |
| 637 free_all((char**)hwm, (char**)max); | |
| 638 } else { | |
| 639 // this chunk was partially used | |
| 640 assert(chunk->contains(hwm), "bad hwm"); | |
| 641 assert(chunk->contains(hwm2), "bad hwm2"); | |
| 642 free_all((char**)hwm, (char**)hwm2); | |
| 643 } | |
| 644 } | |
| 645 | |
| 646 | |
| 647 ReallocMark::ReallocMark() { | |
| 648 #ifdef ASSERT | |
| 649 Thread *thread = ThreadLocalStorage::get_thread_slow(); | |
| 650 _nesting = thread->resource_area()->nesting(); | |
| 651 #endif | |
| 652 } | |
| 653 | |
| 654 void ReallocMark::check() { | |
| 655 #ifdef ASSERT | |
| 656 if (_nesting != Thread::current()->resource_area()->nesting()) { | |
| 657 fatal("allocation bug: array could grow within nested ResourceMark"); | |
| 658 } | |
| 659 #endif | |
| 660 } | |
| 661 | |
| 662 #endif // Non-product |