erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_SPACES_INL_H_ |
| 29 | #define V8_SPACES_INL_H_ |
| 30 | |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 31 | #include "heap-profiler.h" |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 32 | #include "isolate.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 33 | #include "spaces.h" |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 34 | #include "v8memory.h" |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 35 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 36 | namespace v8 { |
| 37 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 38 | |
| 39 | |
| 40 | // ----------------------------------------------------------------------------- |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 41 | // Bitmap |
| 42 | |
| 43 | void Bitmap::Clear(MemoryChunk* chunk) { |
| 44 | Bitmap* bitmap = chunk->markbits(); |
| 45 | for (int i = 0; i < bitmap->CellsCount(); i++) bitmap->cells()[i] = 0; |
| 46 | chunk->ResetLiveBytes(); |
| 47 | } |
| 48 | |
| 49 | |
| 50 | // ----------------------------------------------------------------------------- |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 51 | // PageIterator |
| 52 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 53 | |
| 54 | PageIterator::PageIterator(PagedSpace* space) |
| 55 | : space_(space), |
| 56 | prev_page_(&space->anchor_), |
| 57 | next_page_(prev_page_->next_page()) { } |
| 58 | |
| 59 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 60 | bool PageIterator::has_next() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 61 | return next_page_ != &space_->anchor_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | |
| 65 | Page* PageIterator::next() { |
| 66 | ASSERT(has_next()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 67 | prev_page_ = next_page_; |
| 68 | next_page_ = next_page_->next_page(); |
kasperl@chromium.org | b3284ad | 2009-05-18 06:12:45 +0000 | [diff] [blame] | 69 | return prev_page_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | |
| 73 | // ----------------------------------------------------------------------------- |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 74 | // NewSpacePageIterator |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 75 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 76 | |
| 77 | NewSpacePageIterator::NewSpacePageIterator(NewSpace* space) |
| 78 | : prev_page_(NewSpacePage::FromAddress(space->ToSpaceStart())->prev_page()), |
| 79 | next_page_(NewSpacePage::FromAddress(space->ToSpaceStart())), |
| 80 | last_page_(NewSpacePage::FromLimit(space->ToSpaceEnd())) { } |
| 81 | |
| 82 | NewSpacePageIterator::NewSpacePageIterator(SemiSpace* space) |
| 83 | : prev_page_(space->anchor()), |
| 84 | next_page_(prev_page_->next_page()), |
| 85 | last_page_(prev_page_->prev_page()) { } |
| 86 | |
| 87 | NewSpacePageIterator::NewSpacePageIterator(Address start, Address limit) |
| 88 | : prev_page_(NewSpacePage::FromAddress(start)->prev_page()), |
| 89 | next_page_(NewSpacePage::FromAddress(start)), |
| 90 | last_page_(NewSpacePage::FromLimit(limit)) { |
| 91 | SemiSpace::AssertValidRange(start, limit); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 95 | bool NewSpacePageIterator::has_next() { |
| 96 | return prev_page_ != last_page_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 100 | NewSpacePage* NewSpacePageIterator::next() { |
| 101 | ASSERT(has_next()); |
| 102 | prev_page_ = next_page_; |
| 103 | next_page_ = next_page_->next_page(); |
| 104 | return prev_page_; |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 108 | // ----------------------------------------------------------------------------- |
| 109 | // HeapObjectIterator |
| 110 | HeapObject* HeapObjectIterator::FromCurrentPage() { |
| 111 | while (cur_addr_ != cur_end_) { |
| 112 | if (cur_addr_ == space_->top() && cur_addr_ != space_->limit()) { |
| 113 | cur_addr_ = space_->limit(); |
| 114 | continue; |
ager@chromium.org | 2cc82ae | 2010-06-14 07:35:38 +0000 | [diff] [blame] | 115 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 116 | HeapObject* obj = HeapObject::FromAddress(cur_addr_); |
| 117 | int obj_size = (size_func_ == NULL) ? obj->Size() : size_func_(obj); |
| 118 | cur_addr_ += obj_size; |
| 119 | ASSERT(cur_addr_ <= cur_end_); |
| 120 | if (!obj->IsFiller()) { |
| 121 | ASSERT_OBJECT_SIZE(obj_size); |
| 122 | return obj; |
| 123 | } |
ager@chromium.org | 2cc82ae | 2010-06-14 07:35:38 +0000 | [diff] [blame] | 124 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 125 | return NULL; |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 126 | } |
| 127 | |
fschneider@chromium.org | 013f3e1 | 2010-04-26 13:27:52 +0000 | [diff] [blame] | 128 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 129 | // ----------------------------------------------------------------------------- |
| 130 | // MemoryAllocator |
| 131 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 132 | #ifdef ENABLE_HEAP_PROTECTION |
| 133 | |
| 134 | void MemoryAllocator::Protect(Address start, size_t size) { |
| 135 | OS::Protect(start, size); |
kmillikin@chromium.org | 3cdd9e1 | 2010-09-06 11:39:48 +0000 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 139 | void MemoryAllocator::Unprotect(Address start, |
| 140 | size_t size, |
| 141 | Executability executable) { |
| 142 | OS::Unprotect(start, size, executable); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 146 | void MemoryAllocator::ProtectChunkFromPage(Page* page) { |
| 147 | int id = GetChunkId(page); |
| 148 | OS::Protect(chunks_[id].address(), chunks_[id].size()); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 152 | void MemoryAllocator::UnprotectChunkFromPage(Page* page) { |
| 153 | int id = GetChunkId(page); |
| 154 | OS::Unprotect(chunks_[id].address(), chunks_[id].size(), |
| 155 | chunks_[id].owner()->executable() == EXECUTABLE); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 156 | } |
| 157 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 158 | #endif |
kasperl@chromium.org | f5aa837 | 2009-03-24 14:47:14 +0000 | [diff] [blame] | 159 | |
| 160 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 161 | // -------------------------------------------------------------------------- |
| 162 | // PagedSpace |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 163 | Page* Page::Initialize(Heap* heap, |
| 164 | MemoryChunk* chunk, |
| 165 | Executability executable, |
| 166 | PagedSpace* owner) { |
| 167 | Page* page = reinterpret_cast<Page*>(chunk); |
ulan@chromium.org | 6e196bf | 2013-03-13 09:38:22 +0000 | [diff] [blame] | 168 | ASSERT(page->area_size() <= kNonCodeObjectAreaSize); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 169 | ASSERT(chunk->owner() == owner); |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 170 | owner->IncreaseCapacity(page->area_size()); |
| 171 | owner->Free(page->area_start(), page->area_size()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 172 | |
| 173 | heap->incremental_marking()->SetOldSpacePageFlags(chunk); |
| 174 | |
| 175 | return page; |
| 176 | } |
| 177 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 178 | |
| 179 | bool PagedSpace::Contains(Address addr) { |
| 180 | Page* p = Page::FromAddress(addr); |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 181 | if (!p->is_valid()) return false; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 182 | return p->owner() == this; |
| 183 | } |
| 184 | |
| 185 | |
| 186 | void MemoryChunk::set_scan_on_scavenge(bool scan) { |
| 187 | if (scan) { |
| 188 | if (!scan_on_scavenge()) heap_->increment_scan_on_scavenge_pages(); |
| 189 | SetFlag(SCAN_ON_SCAVENGE); |
| 190 | } else { |
| 191 | if (scan_on_scavenge()) heap_->decrement_scan_on_scavenge_pages(); |
| 192 | ClearFlag(SCAN_ON_SCAVENGE); |
| 193 | } |
| 194 | heap_->incremental_marking()->SetOldSpacePageFlags(this); |
| 195 | } |
| 196 | |
| 197 | |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 198 | MemoryChunk* MemoryChunk::FromAnyPointerAddress(Heap* heap, Address addr) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 199 | MemoryChunk* maybe = reinterpret_cast<MemoryChunk*>( |
| 200 | OffsetFrom(addr) & ~Page::kPageAlignmentMask); |
| 201 | if (maybe->owner() != NULL) return maybe; |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 202 | LargeObjectIterator iterator(heap->lo_space()); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 203 | for (HeapObject* o = iterator.Next(); o != NULL; o = iterator.Next()) { |
| 204 | // Fixed arrays are the only pointer-containing objects in large object |
| 205 | // space. |
| 206 | if (o->IsFixedArray()) { |
| 207 | MemoryChunk* chunk = MemoryChunk::FromAddress(o->address()); |
| 208 | if (chunk->Contains(addr)) { |
| 209 | return chunk; |
| 210 | } |
| 211 | } |
| 212 | } |
| 213 | UNREACHABLE(); |
| 214 | return NULL; |
| 215 | } |
| 216 | |
| 217 | |
danno@chromium.org | 72204d5 | 2012-10-31 10:02:10 +0000 | [diff] [blame] | 218 | void MemoryChunk::UpdateHighWaterMark(Address mark) { |
| 219 | if (mark == NULL) return; |
| 220 | // Need to subtract one from the mark because when a chunk is full the |
| 221 | // top points to the next address after the chunk, which effectively belongs |
| 222 | // to another chunk. See the comment to Page::FromAllocationTop. |
| 223 | MemoryChunk* chunk = MemoryChunk::FromAddress(mark - 1); |
| 224 | int new_mark = static_cast<int>(mark - chunk->address()); |
| 225 | if (new_mark > chunk->high_water_mark_) { |
| 226 | chunk->high_water_mark_ = new_mark; |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 231 | PointerChunkIterator::PointerChunkIterator(Heap* heap) |
| 232 | : state_(kOldPointerState), |
| 233 | old_pointer_iterator_(heap->old_pointer_space()), |
| 234 | map_iterator_(heap->map_space()), |
| 235 | lo_iterator_(heap->lo_space()) { } |
| 236 | |
| 237 | |
| 238 | Page* Page::next_page() { |
| 239 | ASSERT(next_chunk()->owner() == owner()); |
| 240 | return static_cast<Page*>(next_chunk()); |
| 241 | } |
| 242 | |
| 243 | |
| 244 | Page* Page::prev_page() { |
| 245 | ASSERT(prev_chunk()->owner() == owner()); |
| 246 | return static_cast<Page*>(prev_chunk()); |
| 247 | } |
| 248 | |
| 249 | |
| 250 | void Page::set_next_page(Page* page) { |
| 251 | ASSERT(page->owner() == owner()); |
| 252 | set_next_chunk(page); |
| 253 | } |
| 254 | |
| 255 | |
| 256 | void Page::set_prev_page(Page* page) { |
| 257 | ASSERT(page->owner() == owner()); |
| 258 | set_prev_chunk(page); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 262 | // Try linear allocation in the page of alloc_info's allocation top. Does |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 263 | // not contain slow case logic (e.g. move to the next page or try free list |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 264 | // allocation) so it can be used by all the allocation functions and for all |
| 265 | // the paged spaces. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 266 | HeapObject* PagedSpace::AllocateLinearly(int size_in_bytes) { |
| 267 | Address current_top = allocation_info_.top; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 268 | Address new_top = current_top + size_in_bytes; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 269 | if (new_top > allocation_info_.limit) return NULL; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 270 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 271 | allocation_info_.top = new_top; |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 272 | return HeapObject::FromAddress(current_top); |
| 273 | } |
| 274 | |
| 275 | |
| 276 | // Raw allocation. |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 277 | MaybeObject* PagedSpace::AllocateRaw(int size_in_bytes, |
| 278 | AllocationType event) { |
| 279 | HeapProfiler* profiler = heap()->isolate()->heap_profiler(); |
| 280 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 281 | HeapObject* object = AllocateLinearly(size_in_bytes); |
| 282 | if (object != NULL) { |
| 283 | if (identity() == CODE_SPACE) { |
| 284 | SkipList::Update(object->address(), size_in_bytes); |
| 285 | } |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 286 | if (event == NEW_OBJECT && profiler->is_tracking_allocations()) { |
| 287 | profiler->NewObjectEvent(object->address(), size_in_bytes); |
| 288 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 289 | return object; |
| 290 | } |
| 291 | |
ulan@chromium.org | 56c14af | 2012-09-20 12:51:09 +0000 | [diff] [blame] | 292 | ASSERT(!heap()->linear_allocation() || |
| 293 | (anchor_.next_chunk() == &anchor_ && |
| 294 | anchor_.prev_chunk() == &anchor_)); |
| 295 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 296 | object = free_list_.Allocate(size_in_bytes); |
| 297 | if (object != NULL) { |
| 298 | if (identity() == CODE_SPACE) { |
| 299 | SkipList::Update(object->address(), size_in_bytes); |
| 300 | } |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 301 | if (event == NEW_OBJECT && profiler->is_tracking_allocations()) { |
| 302 | profiler->NewObjectEvent(object->address(), size_in_bytes); |
| 303 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 304 | return object; |
| 305 | } |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 306 | |
| 307 | object = SlowAllocateRaw(size_in_bytes); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 308 | if (object != NULL) { |
| 309 | if (identity() == CODE_SPACE) { |
| 310 | SkipList::Update(object->address(), size_in_bytes); |
| 311 | } |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 312 | if (event == NEW_OBJECT && profiler->is_tracking_allocations()) { |
| 313 | profiler->NewObjectEvent(object->address(), size_in_bytes); |
| 314 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 315 | return object; |
| 316 | } |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 317 | |
whesse@chromium.org | 4a5224e | 2010-10-20 12:37:07 +0000 | [diff] [blame] | 318 | return Failure::RetryAfterGC(identity()); |
kasper.lund | 7276f14 | 2008-07-30 08:49:36 +0000 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 322 | // ----------------------------------------------------------------------------- |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 323 | // NewSpace |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 324 | |
| 325 | |
| 326 | MaybeObject* NewSpace::AllocateRaw(int size_in_bytes) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 327 | Address old_top = allocation_info_.top; |
yangguo@chromium.org | efdb9d7 | 2012-04-26 08:21:05 +0000 | [diff] [blame] | 328 | #ifdef DEBUG |
| 329 | // If we are stressing compaction we waste some memory in new space |
| 330 | // in order to get more frequent GCs. |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 331 | if (FLAG_stress_compaction && !heap()->linear_allocation()) { |
yangguo@chromium.org | efdb9d7 | 2012-04-26 08:21:05 +0000 | [diff] [blame] | 332 | if (allocation_info_.limit - old_top >= size_in_bytes * 4) { |
| 333 | int filler_size = size_in_bytes * 4; |
| 334 | for (int i = 0; i < filler_size; i += kPointerSize) { |
| 335 | *(reinterpret_cast<Object**>(old_top + i)) = |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 336 | heap()->one_pointer_filler_map(); |
yangguo@chromium.org | efdb9d7 | 2012-04-26 08:21:05 +0000 | [diff] [blame] | 337 | } |
| 338 | old_top += filler_size; |
| 339 | allocation_info_.top += filler_size; |
| 340 | } |
| 341 | } |
| 342 | #endif |
| 343 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 344 | if (allocation_info_.limit - old_top < size_in_bytes) { |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 345 | return SlowAllocateRaw(size_in_bytes); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 346 | } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 347 | |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 348 | HeapObject* obj = HeapObject::FromAddress(old_top); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 349 | allocation_info_.top += size_in_bytes; |
| 350 | ASSERT_SEMISPACE_ALLOCATION_INFO(allocation_info_, to_space_); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 351 | |
mstarzinger@chromium.org | a2e1a40 | 2013-10-15 08:25:05 +0000 | [diff] [blame] | 352 | HeapProfiler* profiler = heap()->isolate()->heap_profiler(); |
| 353 | if (profiler != NULL && profiler->is_tracking_allocations()) { |
| 354 | profiler->NewObjectEvent(obj->address(), size_in_bytes); |
| 355 | } |
| 356 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 357 | return obj; |
| 358 | } |
| 359 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 360 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 361 | LargePage* LargePage::Initialize(Heap* heap, MemoryChunk* chunk) { |
| 362 | heap->incremental_marking()->SetOldSpacePageFlags(chunk); |
| 363 | return static_cast<LargePage*>(chunk); |
| 364 | } |
| 365 | |
| 366 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 367 | intptr_t LargeObjectSpace::Available() { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 368 | return ObjectSizeFor(heap()->isolate()->memory_allocator()->Available()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 372 | bool FreeListNode::IsFreeListNode(HeapObject* object) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 373 | Map* map = object->map(); |
| 374 | Heap* heap = object->GetHeap(); |
| 375 | return map == heap->raw_unchecked_free_space_map() |
| 376 | || map == heap->raw_unchecked_one_pointer_filler_map() |
| 377 | || map == heap->raw_unchecked_two_pointer_filler_map(); |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 378 | } |
| 379 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 380 | } } // namespace v8::internal |
| 381 | |
| 382 | #endif // V8_SPACES_INL_H_ |