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Side by Side Diff: src/transitions.cc

Issue 1420423009: [heap] Black allocation. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 4 years, 10 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "src/transitions.h" 5 #include "src/transitions.h"
6 6
7 #include "src/objects-inl.h" 7 #include "src/objects-inl.h"
8 #include "src/transitions-inl.h" 8 #include "src/transitions-inl.h"
9 #include "src/utils.h" 9 #include "src/utils.h"
10 10
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386 } 386 }
387 387
388 388
389 // Private static helper functions. 389 // Private static helper functions.
390 390
391 Handle<TransitionArray> TransitionArray::Allocate(Isolate* isolate, 391 Handle<TransitionArray> TransitionArray::Allocate(Isolate* isolate,
392 int number_of_transitions, 392 int number_of_transitions,
393 int slack) { 393 int slack) {
394 Handle<FixedArray> array = isolate->factory()->NewTransitionArray( 394 Handle<FixedArray> array = isolate->factory()->NewTransitionArray(
395 LengthFor(number_of_transitions + slack)); 395 LengthFor(number_of_transitions + slack));
396 array->set(kNextLinkIndex, isolate->heap()->undefined_value());
397 array->set(kPrototypeTransitionsIndex, Smi::FromInt(0)); 396 array->set(kPrototypeTransitionsIndex, Smi::FromInt(0));
398 array->set(kTransitionLengthIndex, Smi::FromInt(number_of_transitions)); 397 array->set(kTransitionLengthIndex, Smi::FromInt(number_of_transitions));
399 return Handle<TransitionArray>::cast(array); 398 return Handle<TransitionArray>::cast(array);
400 } 399 }
401 400
402 401
403 // static 402 // static
404 void TransitionArray::ZapTransitionArray(TransitionArray* transitions) { 403 void TransitionArray::ZapTransitionArray(TransitionArray* transitions) {
405 // Do not zap the next link that is used by GC. 404 // Do not zap the next link that is used by GC.
406 STATIC_ASSERT(kNextLinkIndex + 1 == kPrototypeTransitionsIndex); 405 STATIC_ASSERT(kNextLinkIndex + 1 == kPrototypeTransitionsIndex);
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545 PropertyAttributes attributes, 544 PropertyAttributes attributes,
546 int* out_insertion_index) { 545 int* out_insertion_index) {
547 int transition = SearchName(name, out_insertion_index); 546 int transition = SearchName(name, out_insertion_index);
548 if (transition == kNotFound) { 547 if (transition == kNotFound) {
549 return kNotFound; 548 return kNotFound;
550 } 549 }
551 return SearchDetails(transition, kind, attributes, out_insertion_index); 550 return SearchDetails(transition, kind, attributes, out_insertion_index);
552 } 551 }
553 } // namespace internal 552 } // namespace internal
554 } // namespace v8 553 } // namespace v8
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