Mercurial > hg > graal-compiler
annotate src/share/vm/memory/allocation.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | d2a62e0f25eb |
| children | 7b5885dadbdc |
| rev | line source |
|---|---|
| 0 | 1 /* |
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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 // ClassLoaderDataGraph::contains((address)this); has lock inversion problems |
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70 return !Universe::heap()->is_in_reserved(this); |
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71 } |
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72 |
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73 void MetaspaceObj::print_address_on(outputStream* st) const { |
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74 st->print(" {"INTPTR_FORMAT"}", this); |
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75 } |
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76 |
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77 |
| 6197 | 78 void* ResourceObj::operator new(size_t size, allocation_type type, MEMFLAGS flags) { |
| 0 | 79 address res; |
| 80 switch (type) { | |
| 81 case C_HEAP: | |
| 6197 | 82 res = (address)AllocateHeap(size, flags, CALLER_PC); |
| 1685 | 83 DEBUG_ONLY(set_allocation_type(res, C_HEAP);) |
| 0 | 84 break; |
| 85 case RESOURCE_AREA: | |
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86 // new(size) sets allocation type RESOURCE_AREA. |
| 0 | 87 res = (address)operator new(size); |
| 88 break; | |
| 89 default: | |
| 90 ShouldNotReachHere(); | |
| 91 } | |
| 92 return res; | |
| 93 } | |
| 94 | |
| 95 void ResourceObj::operator delete(void* p) { | |
| 96 assert(((ResourceObj *)p)->allocated_on_C_heap(), | |
| 97 "delete only allowed for C_HEAP objects"); | |
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98 DEBUG_ONLY(((ResourceObj *)p)->_allocation_t[0] = (uintptr_t)badHeapOopVal;) |
| 0 | 99 FreeHeap(p); |
| 100 } | |
| 101 | |
| 1685 | 102 #ifdef ASSERT |
| 103 void ResourceObj::set_allocation_type(address res, allocation_type type) { | |
| 104 // Set allocation type in the resource object | |
| 105 uintptr_t allocation = (uintptr_t)res; | |
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106 assert((allocation & allocation_mask) == 0, "address should be aligned to 4 bytes at least"); |
| 1685 | 107 assert(type <= allocation_mask, "incorrect allocation type"); |
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108 ResourceObj* resobj = (ResourceObj *)res; |
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109 resobj->_allocation_t[0] = ~(allocation + type); |
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110 if (type != STACK_OR_EMBEDDED) { |
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111 // Called from operator new() and CollectionSetChooser(), |
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112 // set verification value. |
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113 resobj->_allocation_t[1] = (uintptr_t)&(resobj->_allocation_t[1]) + type; |
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114 } |
| 1685 | 115 } |
| 116 | |
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117 ResourceObj::allocation_type ResourceObj::get_allocation_type() const { |
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118 assert(~(_allocation_t[0] | allocation_mask) == (uintptr_t)this, "lost resource object"); |
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119 return (allocation_type)((~_allocation_t[0]) & allocation_mask); |
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120 } |
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121 |
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122 bool ResourceObj::is_type_set() const { |
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123 allocation_type type = (allocation_type)(_allocation_t[1] & allocation_mask); |
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124 return get_allocation_type() == type && |
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125 (_allocation_t[1] - type) == (uintptr_t)(&_allocation_t[1]); |
| 1685 | 126 } |
| 127 | |
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128 ResourceObj::ResourceObj() { // default constructor |
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129 if (~(_allocation_t[0] | allocation_mask) != (uintptr_t)this) { |
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130 // Operator new() is not called for allocations |
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131 // on stack and for embedded objects. |
| 1685 | 132 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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133 } else if (allocated_on_stack()) { // STACK_OR_EMBEDDED |
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134 // For some reason we got a value which resembles |
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135 // an embedded or stack object (operator new() does not |
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136 // set such type). Keep it since it is valid value |
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137 // (even if it was garbage). |
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138 // Ignore garbage in other fields. |
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139 } else if (is_type_set()) { |
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140 // Operator new() was called and type was set. |
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141 assert(!allocated_on_stack(), |
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142 err_msg("not embedded or stack, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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143 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
| 1685 | 144 } else { |
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145 // Operator new() was not called. |
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146 // Assume that it is embedded or stack object. |
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147 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
| 1685 | 148 } |
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149 _allocation_t[1] = 0; // Zap verification value |
| 1685 | 150 } |
| 151 | |
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152 ResourceObj::ResourceObj(const ResourceObj& r) { // default copy constructor |
| 1685 | 153 // Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream. |
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154 // Note: garbage may resembles valid value. |
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155 assert(~(_allocation_t[0] | allocation_mask) != (uintptr_t)this || !is_type_set(), |
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156 err_msg("embedded or stack only, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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157 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
| 1685 | 158 set_allocation_type((address)this, STACK_OR_EMBEDDED); |
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159 _allocation_t[1] = 0; // Zap verification value |
| 1685 | 160 } |
| 161 | |
| 162 ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment | |
| 163 // Used in InlineTree::ok_to_inline() for WarmCallInfo. | |
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164 assert(allocated_on_stack(), |
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165 err_msg("copy only into local, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")", |
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166 this, get_allocation_type(), _allocation_t[0], _allocation_t[1])); |
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167 // Keep current _allocation_t value; |
| 1685 | 168 return *this; |
| 169 } | |
| 170 | |
| 171 ResourceObj::~ResourceObj() { | |
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172 // allocated_on_C_heap() also checks that encoded (in _allocation) address == this. |
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173 if (!allocated_on_C_heap()) { // ResourceObj::delete() will zap _allocation for C_heap. |
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174 _allocation_t[0] = (uintptr_t)badHeapOopVal; // zap type |
| 1685 | 175 } |
| 176 } | |
| 177 #endif // ASSERT | |
| 178 | |
| 179 | |
| 0 | 180 void trace_heap_malloc(size_t size, const char* name, void* p) { |
| 181 // A lock is not needed here - tty uses a lock internally | |
| 2250 | 182 tty->print_cr("Heap malloc " INTPTR_FORMAT " " SIZE_FORMAT " %s", p, size, name == NULL ? "" : name); |
| 0 | 183 } |
| 184 | |
| 185 | |
| 186 void trace_heap_free(void* p) { | |
| 187 // A lock is not needed here - tty uses a lock internally | |
| 188 tty->print_cr("Heap free " INTPTR_FORMAT, p); | |
| 189 } | |
| 190 | |
| 191 bool warn_new_operator = false; // see vm_main | |
| 192 | |
| 193 //-------------------------------------------------------------------------------------- | |
| 194 // ChunkPool implementation | |
| 195 | |
| 196 // MT-safe pool of chunks to reduce malloc/free thrashing | |
| 197 // NB: not using Mutex because pools are used before Threads are initialized | |
| 6197 | 198 class ChunkPool: public CHeapObj<mtInternal> { |
| 0 | 199 Chunk* _first; // first cached Chunk; its first word points to next chunk |
| 200 size_t _num_chunks; // number of unused chunks in pool | |
| 201 size_t _num_used; // number of chunks currently checked out | |
| 202 const size_t _size; // size of each chunk (must be uniform) | |
| 203 | |
| 204 // Our three static pools | |
| 205 static ChunkPool* _large_pool; | |
| 206 static ChunkPool* _medium_pool; | |
| 207 static ChunkPool* _small_pool; | |
| 208 | |
| 209 // return first element or null | |
| 210 void* get_first() { | |
| 211 Chunk* c = _first; | |
| 212 if (_first) { | |
| 213 _first = _first->next(); | |
| 214 _num_chunks--; | |
| 215 } | |
| 216 return c; | |
| 217 } | |
| 218 | |
| 219 public: | |
| 220 // All chunks in a ChunkPool has the same size | |
| 221 ChunkPool(size_t size) : _size(size) { _first = NULL; _num_chunks = _num_used = 0; } | |
| 222 | |
| 223 // Allocate a new chunk from the pool (might expand the pool) | |
| 6197 | 224 _NOINLINE_ void* allocate(size_t bytes) { |
| 0 | 225 assert(bytes == _size, "bad size"); |
| 226 void* p = NULL; | |
| 6197 | 227 // No VM lock can be taken inside ThreadCritical lock, so os::malloc |
| 228 // should be done outside ThreadCritical lock due to NMT | |
| 0 | 229 { ThreadCritical tc; |
| 230 _num_used++; | |
| 231 p = get_first(); | |
| 232 } | |
| 6197 | 233 if (p == NULL) p = os::malloc(bytes, mtChunk, CURRENT_PC); |
| 0 | 234 if (p == NULL) |
| 235 vm_exit_out_of_memory(bytes, "ChunkPool::allocate"); | |
| 236 | |
| 237 return p; | |
| 238 } | |
| 239 | |
| 240 // Return a chunk to the pool | |
| 241 void free(Chunk* chunk) { | |
| 242 assert(chunk->length() + Chunk::aligned_overhead_size() == _size, "bad size"); | |
| 243 ThreadCritical tc; | |
| 244 _num_used--; | |
| 245 | |
| 246 // Add chunk to list | |
| 247 chunk->set_next(_first); | |
| 248 _first = chunk; | |
| 249 _num_chunks++; | |
| 250 } | |
| 251 | |
| 252 // Prune the pool | |
| 253 void free_all_but(size_t n) { | |
| 6197 | 254 Chunk* cur = NULL; |
| 255 Chunk* next; | |
| 256 { | |
| 0 | 257 // if we have more than n chunks, free all of them |
| 258 ThreadCritical tc; | |
| 259 if (_num_chunks > n) { | |
| 260 // free chunks at end of queue, for better locality | |
| 6197 | 261 cur = _first; |
| 0 | 262 for (size_t i = 0; i < (n - 1) && cur != NULL; i++) cur = cur->next(); |
| 263 | |
| 264 if (cur != NULL) { | |
| 6197 | 265 next = cur->next(); |
| 0 | 266 cur->set_next(NULL); |
| 267 cur = next; | |
| 268 | |
| 6197 | 269 _num_chunks = n; |
| 270 } | |
| 271 } | |
| 272 } | |
| 273 | |
| 274 // Free all remaining chunks, outside of ThreadCritical | |
| 275 // to avoid deadlock with NMT | |
| 0 | 276 while(cur != NULL) { |
| 277 next = cur->next(); | |
| 6197 | 278 os::free(cur, mtChunk); |
| 0 | 279 cur = next; |
| 280 } | |
| 281 } | |
| 282 | |
| 283 // Accessors to preallocated pool's | |
| 284 static ChunkPool* large_pool() { assert(_large_pool != NULL, "must be initialized"); return _large_pool; } | |
| 285 static ChunkPool* medium_pool() { assert(_medium_pool != NULL, "must be initialized"); return _medium_pool; } | |
| 286 static ChunkPool* small_pool() { assert(_small_pool != NULL, "must be initialized"); return _small_pool; } | |
| 287 | |
| 288 static void initialize() { | |
| 289 _large_pool = new ChunkPool(Chunk::size + Chunk::aligned_overhead_size()); | |
| 290 _medium_pool = new ChunkPool(Chunk::medium_size + Chunk::aligned_overhead_size()); | |
| 291 _small_pool = new ChunkPool(Chunk::init_size + Chunk::aligned_overhead_size()); | |
| 292 } | |
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293 |
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294 static void clean() { |
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295 enum { BlocksToKeep = 5 }; |
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296 _small_pool->free_all_but(BlocksToKeep); |
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297 _medium_pool->free_all_but(BlocksToKeep); |
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298 _large_pool->free_all_but(BlocksToKeep); |
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299 } |
| 0 | 300 }; |
| 301 | |
| 302 ChunkPool* ChunkPool::_large_pool = NULL; | |
| 303 ChunkPool* ChunkPool::_medium_pool = NULL; | |
| 304 ChunkPool* ChunkPool::_small_pool = NULL; | |
| 305 | |
| 306 void chunkpool_init() { | |
| 307 ChunkPool::initialize(); | |
| 308 } | |
| 309 | |
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310 void |
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311 Chunk::clean_chunk_pool() { |
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312 ChunkPool::clean(); |
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313 } |
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314 |
| 0 | 315 |
| 316 //-------------------------------------------------------------------------------------- | |
| 317 // ChunkPoolCleaner implementation | |
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318 // |
| 0 | 319 |
| 320 class ChunkPoolCleaner : public PeriodicTask { | |
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321 enum { CleaningInterval = 5000 }; // cleaning interval in ms |
| 0 | 322 |
| 323 public: | |
| 324 ChunkPoolCleaner() : PeriodicTask(CleaningInterval) {} | |
| 325 void task() { | |
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326 ChunkPool::clean(); |
| 0 | 327 } |
| 328 }; | |
| 329 | |
| 330 //-------------------------------------------------------------------------------------- | |
| 331 // Chunk implementation | |
| 332 | |
| 333 void* Chunk::operator new(size_t requested_size, size_t length) { | |
| 334 // requested_size is equal to sizeof(Chunk) but in order for the arena | |
| 335 // allocations to come out aligned as expected the size must be aligned | |
| 336 // to expected arean alignment. | |
| 337 // expect requested_size but if sizeof(Chunk) doesn't match isn't proper size we must align it. | |
| 338 assert(ARENA_ALIGN(requested_size) == aligned_overhead_size(), "Bad alignment"); | |
| 339 size_t bytes = ARENA_ALIGN(requested_size) + length; | |
| 340 switch (length) { | |
| 341 case Chunk::size: return ChunkPool::large_pool()->allocate(bytes); | |
| 342 case Chunk::medium_size: return ChunkPool::medium_pool()->allocate(bytes); | |
| 343 case Chunk::init_size: return ChunkPool::small_pool()->allocate(bytes); | |
| 344 default: { | |
| 6197 | 345 void *p = os::malloc(bytes, mtChunk, CALLER_PC); |
| 0 | 346 if (p == NULL) |
| 347 vm_exit_out_of_memory(bytes, "Chunk::new"); | |
| 348 return p; | |
| 349 } | |
| 350 } | |
| 351 } | |
| 352 | |
| 353 void Chunk::operator delete(void* p) { | |
| 354 Chunk* c = (Chunk*)p; | |
| 355 switch (c->length()) { | |
| 356 case Chunk::size: ChunkPool::large_pool()->free(c); break; | |
| 357 case Chunk::medium_size: ChunkPool::medium_pool()->free(c); break; | |
| 358 case Chunk::init_size: ChunkPool::small_pool()->free(c); break; | |
| 6197 | 359 default: os::free(c, mtChunk); |
| 0 | 360 } |
| 361 } | |
| 362 | |
| 363 Chunk::Chunk(size_t length) : _len(length) { | |
| 364 _next = NULL; // Chain on the linked list | |
| 365 } | |
| 366 | |
| 367 | |
| 368 void Chunk::chop() { | |
| 369 Chunk *k = this; | |
| 370 while( k ) { | |
| 371 Chunk *tmp = k->next(); | |
| 372 // clear out this chunk (to detect allocation bugs) | |
| 373 if (ZapResourceArea) memset(k->bottom(), badResourceValue, k->length()); | |
| 374 delete k; // Free chunk (was malloc'd) | |
| 375 k = tmp; | |
| 376 } | |
| 377 } | |
| 378 | |
| 379 void Chunk::next_chop() { | |
| 380 _next->chop(); | |
| 381 _next = NULL; | |
| 382 } | |
| 383 | |
| 384 | |
| 385 void Chunk::start_chunk_pool_cleaner_task() { | |
| 386 #ifdef ASSERT | |
| 387 static bool task_created = false; | |
| 388 assert(!task_created, "should not start chuck pool cleaner twice"); | |
| 389 task_created = true; | |
| 390 #endif | |
| 391 ChunkPoolCleaner* cleaner = new ChunkPoolCleaner(); | |
| 392 cleaner->enroll(); | |
| 393 } | |
| 394 | |
| 395 //------------------------------Arena------------------------------------------ | |
| 6197 | 396 NOT_PRODUCT(volatile jint Arena::_instance_count = 0;) |
| 0 | 397 |
| 398 Arena::Arena(size_t init_size) { | |
| 399 size_t round_size = (sizeof (char *)) - 1; | |
| 400 init_size = (init_size+round_size) & ~round_size; | |
| 401 _first = _chunk = new (init_size) Chunk(init_size); | |
| 402 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
| 403 _max = _chunk->top(); | |
| 404 set_size_in_bytes(init_size); | |
| 6197 | 405 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
| 0 | 406 } |
| 407 | |
| 408 Arena::Arena() { | |
| 409 _first = _chunk = new (Chunk::init_size) Chunk(Chunk::init_size); | |
| 410 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
| 411 _max = _chunk->top(); | |
| 412 set_size_in_bytes(Chunk::init_size); | |
| 6197 | 413 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
| 0 | 414 } |
| 415 | |
| 416 Arena::Arena(Arena *a) : _chunk(a->_chunk), _hwm(a->_hwm), _max(a->_max), _first(a->_first) { | |
| 417 set_size_in_bytes(a->size_in_bytes()); | |
| 6197 | 418 NOT_PRODUCT(Atomic::inc(&_instance_count);) |
| 0 | 419 } |
| 420 | |
| 6197 | 421 |
| 0 | 422 Arena *Arena::move_contents(Arena *copy) { |
| 423 copy->destruct_contents(); | |
| 424 copy->_chunk = _chunk; | |
| 425 copy->_hwm = _hwm; | |
| 426 copy->_max = _max; | |
| 427 copy->_first = _first; | |
| 428 copy->set_size_in_bytes(size_in_bytes()); | |
| 429 // Destroy original arena | |
| 430 reset(); | |
| 431 return copy; // Return Arena with contents | |
| 432 } | |
| 433 | |
| 434 Arena::~Arena() { | |
| 435 destruct_contents(); | |
| 6197 | 436 NOT_PRODUCT(Atomic::dec(&_instance_count);) |
| 437 } | |
| 438 | |
| 439 void* Arena::operator new(size_t size) { | |
| 440 assert(false, "Use dynamic memory type binding"); | |
| 441 return NULL; | |
| 442 } | |
| 443 | |
| 444 void* Arena::operator new (size_t size, const std::nothrow_t& nothrow_constant) { | |
| 445 assert(false, "Use dynamic memory type binding"); | |
| 446 return NULL; | |
| 447 } | |
| 448 | |
| 449 // dynamic memory type binding | |
| 450 void* Arena::operator new(size_t size, MEMFLAGS flags) { | |
| 451 #ifdef ASSERT | |
| 452 void* p = (void*)AllocateHeap(size, flags|otArena, CALLER_PC); | |
| 453 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); | |
| 454 return p; | |
| 455 #else | |
| 456 return (void *) AllocateHeap(size, flags|otArena, CALLER_PC); | |
| 457 #endif | |
| 458 } | |
| 459 | |
| 460 void* Arena::operator new(size_t size, const std::nothrow_t& nothrow_constant, MEMFLAGS flags) { | |
| 461 #ifdef ASSERT | |
| 462 void* p = os::malloc(size, flags|otArena, CALLER_PC); | |
| 463 if (PrintMallocFree) trace_heap_malloc(size, "Arena-new", p); | |
| 464 return p; | |
| 465 #else | |
| 466 return os::malloc(size, flags|otArena, CALLER_PC); | |
| 467 #endif | |
| 468 } | |
| 469 | |
| 470 void Arena::operator delete(void* p) { | |
| 471 FreeHeap(p); | |
| 0 | 472 } |
| 473 | |
| 474 // Destroy this arenas contents and reset to empty | |
| 475 void Arena::destruct_contents() { | |
| 476 if (UseMallocOnly && _first != NULL) { | |
| 477 char* end = _first->next() ? _first->top() : _hwm; | |
| 478 free_malloced_objects(_first, _first->bottom(), end, _hwm); | |
| 479 } | |
| 480 _first->chop(); | |
| 481 reset(); | |
| 482 } | |
| 483 | |
| 6197 | 484 // This is high traffic method, but many calls actually don't |
| 485 // change the size | |
| 486 void Arena::set_size_in_bytes(size_t size) { | |
| 487 if (_size_in_bytes != size) { | |
| 488 _size_in_bytes = size; | |
| 489 MemTracker::record_arena_size((address)this, size); | |
| 490 } | |
| 491 } | |
| 0 | 492 |
| 493 // Total of all Chunks in arena | |
| 494 size_t Arena::used() const { | |
| 495 size_t sum = _chunk->length() - (_max-_hwm); // Size leftover in this Chunk | |
| 496 register Chunk *k = _first; | |
| 497 while( k != _chunk) { // Whilst have Chunks in a row | |
| 498 sum += k->length(); // Total size of this Chunk | |
| 499 k = k->next(); // Bump along to next Chunk | |
| 500 } | |
| 501 return sum; // Return total consumed space. | |
| 502 } | |
| 503 | |
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504 void Arena::signal_out_of_memory(size_t sz, const char* whence) const { |
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505 vm_exit_out_of_memory(sz, whence); |
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506 } |
| 0 | 507 |
| 508 // Grow a new Chunk | |
| 509 void* Arena::grow( size_t x ) { | |
| 510 // Get minimal required size. Either real big, or even bigger for giant objs | |
| 511 size_t len = MAX2(x, (size_t) Chunk::size); | |
| 512 | |
| 513 Chunk *k = _chunk; // Get filled-up chunk address | |
| 514 _chunk = new (len) Chunk(len); | |
| 515 | |
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516 if (_chunk == NULL) { |
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517 signal_out_of_memory(len * Chunk::aligned_overhead_size(), "Arena::grow"); |
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518 } |
| 0 | 519 if (k) k->set_next(_chunk); // Append new chunk to end of linked list |
| 520 else _first = _chunk; | |
| 521 _hwm = _chunk->bottom(); // Save the cached hwm, max | |
| 522 _max = _chunk->top(); | |
| 523 set_size_in_bytes(size_in_bytes() + len); | |
| 524 void* result = _hwm; | |
| 525 _hwm += x; | |
| 526 return result; | |
| 527 } | |
| 528 | |
| 529 | |
| 530 | |
| 531 // Reallocate storage in Arena. | |
| 532 void *Arena::Arealloc(void* old_ptr, size_t old_size, size_t new_size) { | |
| 533 assert(new_size >= 0, "bad size"); | |
| 534 if (new_size == 0) return NULL; | |
| 535 #ifdef ASSERT | |
| 536 if (UseMallocOnly) { | |
| 537 // always allocate a new object (otherwise we'll free this one twice) | |
| 538 char* copy = (char*)Amalloc(new_size); | |
| 539 size_t n = MIN2(old_size, new_size); | |
| 540 if (n > 0) memcpy(copy, old_ptr, n); | |
| 541 Afree(old_ptr,old_size); // Mostly done to keep stats accurate | |
| 542 return copy; | |
| 543 } | |
| 544 #endif | |
| 545 char *c_old = (char*)old_ptr; // Handy name | |
| 546 // Stupid fast special case | |
| 547 if( new_size <= old_size ) { // Shrink in-place | |
| 548 if( c_old+old_size == _hwm) // Attempt to free the excess bytes | |
| 549 _hwm = c_old+new_size; // Adjust hwm | |
| 550 return c_old; | |
| 551 } | |
| 552 | |
| 553 // make sure that new_size is legal | |
| 554 size_t corrected_new_size = ARENA_ALIGN(new_size); | |
| 555 | |
| 556 // See if we can resize in-place | |
| 557 if( (c_old+old_size == _hwm) && // Adjusting recent thing | |
| 558 (c_old+corrected_new_size <= _max) ) { // Still fits where it sits | |
| 559 _hwm = c_old+corrected_new_size; // Adjust hwm | |
| 560 return c_old; // Return old pointer | |
| 561 } | |
| 562 | |
| 563 // Oops, got to relocate guts | |
| 564 void *new_ptr = Amalloc(new_size); | |
| 565 memcpy( new_ptr, c_old, old_size ); | |
| 566 Afree(c_old,old_size); // Mostly done to keep stats accurate | |
| 567 return new_ptr; | |
| 568 } | |
| 569 | |
| 570 | |
| 571 // Determine if pointer belongs to this Arena or not. | |
| 572 bool Arena::contains( const void *ptr ) const { | |
| 573 #ifdef ASSERT | |
| 574 if (UseMallocOnly) { | |
| 575 // really slow, but not easy to make fast | |
| 576 if (_chunk == NULL) return false; | |
| 577 char** bottom = (char**)_chunk->bottom(); | |
| 578 for (char** p = (char**)_hwm - 1; p >= bottom; p--) { | |
| 579 if (*p == ptr) return true; | |
| 580 } | |
| 581 for (Chunk *c = _first; c != NULL; c = c->next()) { | |
| 582 if (c == _chunk) continue; // current chunk has been processed | |
| 583 char** bottom = (char**)c->bottom(); | |
| 584 for (char** p = (char**)c->top() - 1; p >= bottom; p--) { | |
| 585 if (*p == ptr) return true; | |
| 586 } | |
| 587 } | |
| 588 return false; | |
| 589 } | |
| 590 #endif | |
| 591 if( (void*)_chunk->bottom() <= ptr && ptr < (void*)_hwm ) | |
| 592 return true; // Check for in this chunk | |
| 593 for (Chunk *c = _first; c; c = c->next()) { | |
| 594 if (c == _chunk) continue; // current chunk has been processed | |
| 595 if ((void*)c->bottom() <= ptr && ptr < (void*)c->top()) { | |
| 596 return true; // Check for every chunk in Arena | |
| 597 } | |
| 598 } | |
| 599 return false; // Not in any Chunk, so not in Arena | |
| 600 } | |
| 601 | |
| 602 | |
| 603 #ifdef ASSERT | |
| 604 void* Arena::malloc(size_t size) { | |
| 605 assert(UseMallocOnly, "shouldn't call"); | |
| 606 // use malloc, but save pointer in res. area for later freeing | |
| 607 char** save = (char**)internal_malloc_4(sizeof(char*)); | |
| 6197 | 608 return (*save = (char*)os::malloc(size, mtChunk)); |
| 0 | 609 } |
| 610 | |
| 611 // for debugging with UseMallocOnly | |
| 612 void* Arena::internal_malloc_4(size_t x) { | |
| 613 assert( (x&(sizeof(char*)-1)) == 0, "misaligned size" ); | |
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614 check_for_overflow(x, "Arena::internal_malloc_4"); |
| 0 | 615 if (_hwm + x > _max) { |
| 616 return grow(x); | |
| 617 } else { | |
| 618 char *old = _hwm; | |
| 619 _hwm += x; | |
| 620 return old; | |
| 621 } | |
| 622 } | |
| 623 #endif | |
| 624 | |
| 625 | |
| 626 //-------------------------------------------------------------------------------------- | |
| 627 // Non-product code | |
| 628 | |
| 629 #ifndef PRODUCT | |
| 630 // The global operator new should never be called since it will usually indicate | |
| 631 // a memory leak. Use CHeapObj as the base class of such objects to make it explicit | |
| 632 // that they're allocated on the C heap. | |
| 633 // Commented out in product version to avoid conflicts with third-party C++ native code. | |
| 634 // %% note this is causing a problem on solaris debug build. the global | |
| 635 // new is being called from jdk source and causing data corruption. | |
| 636 // src/share/native/sun/awt/font/fontmanager/textcache/hsMemory.cpp::hsSoftNew | |
| 637 // define CATCH_OPERATOR_NEW_USAGE if you want to use this. | |
| 638 #ifdef CATCH_OPERATOR_NEW_USAGE | |
| 639 void* operator new(size_t size){ | |
| 640 static bool warned = false; | |
| 641 if (!warned && warn_new_operator) | |
| 642 warning("should not call global (default) operator new"); | |
| 643 warned = true; | |
| 644 return (void *) AllocateHeap(size, "global operator new"); | |
| 645 } | |
| 646 #endif | |
| 647 | |
| 648 void AllocatedObj::print() const { print_on(tty); } | |
| 649 void AllocatedObj::print_value() const { print_value_on(tty); } | |
| 650 | |
| 651 void AllocatedObj::print_on(outputStream* st) const { | |
| 652 st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", this); | |
| 653 } | |
| 654 | |
| 655 void AllocatedObj::print_value_on(outputStream* st) const { | |
| 656 st->print("AllocatedObj(" INTPTR_FORMAT ")", this); | |
| 657 } | |
| 658 | |
| 2250 | 659 julong Arena::_bytes_allocated = 0; |
| 660 | |
| 661 void Arena::inc_bytes_allocated(size_t x) { inc_stat_counter(&_bytes_allocated, x); } | |
| 0 | 662 |
| 663 AllocStats::AllocStats() { | |
| 2250 | 664 start_mallocs = os::num_mallocs; |
| 665 start_frees = os::num_frees; | |
| 0 | 666 start_malloc_bytes = os::alloc_bytes; |
| 2250 | 667 start_mfree_bytes = os::free_bytes; |
| 668 start_res_bytes = Arena::_bytes_allocated; | |
| 0 | 669 } |
| 670 | |
| 2250 | 671 julong AllocStats::num_mallocs() { return os::num_mallocs - start_mallocs; } |
| 672 julong AllocStats::alloc_bytes() { return os::alloc_bytes - start_malloc_bytes; } | |
| 673 julong AllocStats::num_frees() { return os::num_frees - start_frees; } | |
| 674 julong AllocStats::free_bytes() { return os::free_bytes - start_mfree_bytes; } | |
| 675 julong AllocStats::resource_bytes() { return Arena::_bytes_allocated - start_res_bytes; } | |
| 0 | 676 void AllocStats::print() { |
| 2250 | 677 tty->print_cr(UINT64_FORMAT " mallocs (" UINT64_FORMAT "MB), " |
| 678 UINT64_FORMAT" frees (" UINT64_FORMAT "MB), " UINT64_FORMAT "MB resrc", | |
| 679 num_mallocs(), alloc_bytes()/M, num_frees(), free_bytes()/M, resource_bytes()/M); | |
| 0 | 680 } |
| 681 | |
| 682 | |
| 683 // debugging code | |
| 684 inline void Arena::free_all(char** start, char** end) { | |
| 685 for (char** p = start; p < end; p++) if (*p) os::free(*p); | |
| 686 } | |
| 687 | |
| 688 void Arena::free_malloced_objects(Chunk* chunk, char* hwm, char* max, char* hwm2) { | |
| 689 assert(UseMallocOnly, "should not call"); | |
| 690 // free all objects malloced since resource mark was created; resource area | |
| 691 // contains their addresses | |
| 692 if (chunk->next()) { | |
| 693 // this chunk is full, and some others too | |
| 694 for (Chunk* c = chunk->next(); c != NULL; c = c->next()) { | |
| 695 char* top = c->top(); | |
| 696 if (c->next() == NULL) { | |
| 697 top = hwm2; // last junk is only used up to hwm2 | |
| 698 assert(c->contains(hwm2), "bad hwm2"); | |
| 699 } | |
| 700 free_all((char**)c->bottom(), (char**)top); | |
| 701 } | |
| 702 assert(chunk->contains(hwm), "bad hwm"); | |
| 703 assert(chunk->contains(max), "bad max"); | |
| 704 free_all((char**)hwm, (char**)max); | |
| 705 } else { | |
| 706 // this chunk was partially used | |
| 707 assert(chunk->contains(hwm), "bad hwm"); | |
| 708 assert(chunk->contains(hwm2), "bad hwm2"); | |
| 709 free_all((char**)hwm, (char**)hwm2); | |
| 710 } | |
| 711 } | |
| 712 | |
| 713 | |
| 714 ReallocMark::ReallocMark() { | |
| 715 #ifdef ASSERT | |
| 716 Thread *thread = ThreadLocalStorage::get_thread_slow(); | |
| 717 _nesting = thread->resource_area()->nesting(); | |
| 718 #endif | |
| 719 } | |
| 720 | |
| 721 void ReallocMark::check() { | |
| 722 #ifdef ASSERT | |
| 723 if (_nesting != Thread::current()->resource_area()->nesting()) { | |
| 724 fatal("allocation bug: array could grow within nested ResourceMark"); | |
| 725 } | |
| 726 #endif | |
| 727 } | |
| 728 | |
| 729 #endif // Non-product |