1b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Copyright 2012 the V8 project authors. All rights reserved. 2b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Use of this source code is governed by a BSD-style license that can be 3b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// found in the LICENSE file. 4b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 5b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifndef V8_HEAP_HEAP_H_ 6b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define V8_HEAP_HEAP_H_ 7b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 8b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include <cmath> 9b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 10b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/allocation.h" 11b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/assert-scope.h" 12b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/counters.h" 13b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/globals.h" 14b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/heap/gc-idle-time-handler.h" 15b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/heap/gc-tracer.h" 16b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/heap/incremental-marking.h" 17b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/heap/mark-compact.h" 18b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/heap/objects-visiting.h" 19b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/heap/spaces.h" 20b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/heap/store-buffer.h" 21b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/list.h" 22b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#include "src/splay-tree-inl.h" 23b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 24b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochnamespace v8 { 25b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochnamespace internal { 26b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 27b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Defines all the roots in Heap. 28b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define STRONG_ROOT_LIST(V) \ 29b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, byte_array_map, ByteArrayMap) \ 30b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, free_space_map, FreeSpaceMap) \ 31b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, one_pointer_filler_map, OnePointerFillerMap) \ 32b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, two_pointer_filler_map, TwoPointerFillerMap) \ 33b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch /* Cluster the most popular ones in a few cache lines here at the top. */ \ 34b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Smi, store_buffer_top, StoreBufferTop) \ 35b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Oddball, undefined_value, UndefinedValue) \ 36b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Oddball, the_hole_value, TheHoleValue) \ 37b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Oddball, null_value, NullValue) \ 38b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Oddball, true_value, TrueValue) \ 39b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Oddball, false_value, FalseValue) \ 40b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Oddball, uninitialized_value, UninitializedValue) \ 41b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Oddball, exception, Exception) \ 42b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, cell_map, CellMap) \ 43b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, global_property_cell_map, GlobalPropertyCellMap) \ 44b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, shared_function_info_map, SharedFunctionInfoMap) \ 45b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, meta_map, MetaMap) \ 46b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, heap_number_map, HeapNumberMap) \ 47b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, mutable_heap_number_map, MutableHeapNumberMap) \ 48b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, native_context_map, NativeContextMap) \ 49b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_array_map, FixedArrayMap) \ 50b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, code_map, CodeMap) \ 51b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, scope_info_map, ScopeInfoMap) \ 52b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_cow_array_map, FixedCOWArrayMap) \ 53b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_double_array_map, FixedDoubleArrayMap) \ 54b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, constant_pool_array_map, ConstantPoolArrayMap) \ 55b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Oddball, no_interceptor_result_sentinel, NoInterceptorResultSentinel) \ 56b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, hash_table_map, HashTableMap) \ 57b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, ordered_hash_table_map, OrderedHashTableMap) \ 58b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedArray, empty_fixed_array, EmptyFixedArray) \ 59b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ByteArray, empty_byte_array, EmptyByteArray) \ 60b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(DescriptorArray, empty_descriptor_array, EmptyDescriptorArray) \ 61b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ConstantPoolArray, empty_constant_pool_array, EmptyConstantPoolArray) \ 62b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Oddball, arguments_marker, ArgumentsMarker) \ 63b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch /* The roots above this line should be boring from a GC point of view. */ \ 64b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch /* This means they are never in new space and never on a page that is */ \ 65b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch /* being compacted. */ \ 66b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedArray, number_string_cache, NumberStringCache) \ 67b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Object, instanceof_cache_function, InstanceofCacheFunction) \ 68b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Object, instanceof_cache_map, InstanceofCacheMap) \ 69b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Object, instanceof_cache_answer, InstanceofCacheAnswer) \ 70b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedArray, single_character_string_cache, SingleCharacterStringCache) \ 71b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedArray, string_split_cache, StringSplitCache) \ 72b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedArray, regexp_multiple_cache, RegExpMultipleCache) \ 73b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Oddball, termination_exception, TerminationException) \ 74b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Smi, hash_seed, HashSeed) \ 75b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, symbol_map, SymbolMap) \ 76b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, string_map, StringMap) \ 77b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, one_byte_string_map, OneByteStringMap) \ 78b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, cons_string_map, ConsStringMap) \ 79b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, cons_one_byte_string_map, ConsOneByteStringMap) \ 80b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, sliced_string_map, SlicedStringMap) \ 81b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, sliced_one_byte_string_map, SlicedOneByteStringMap) \ 82b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_string_map, ExternalStringMap) \ 83b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_string_with_one_byte_data_map, \ 84b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ExternalStringWithOneByteDataMap) \ 85b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_one_byte_string_map, ExternalOneByteStringMap) \ 86b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, short_external_string_map, ShortExternalStringMap) \ 87b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, short_external_string_with_one_byte_data_map, \ 88b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ShortExternalStringWithOneByteDataMap) \ 89b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, internalized_string_map, InternalizedStringMap) \ 90b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, one_byte_internalized_string_map, OneByteInternalizedStringMap) \ 91b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_internalized_string_map, ExternalInternalizedStringMap) \ 92b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_internalized_string_with_one_byte_data_map, \ 93b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ExternalInternalizedStringWithOneByteDataMap) \ 94b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_one_byte_internalized_string_map, \ 95b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ExternalOneByteInternalizedStringMap) \ 96b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, short_external_internalized_string_map, \ 97b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ShortExternalInternalizedStringMap) \ 98b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, short_external_internalized_string_with_one_byte_data_map, \ 99b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ShortExternalInternalizedStringWithOneByteDataMap) \ 100b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, short_external_one_byte_internalized_string_map, \ 101b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ShortExternalOneByteInternalizedStringMap) \ 102b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, short_external_one_byte_string_map, ShortExternalOneByteStringMap) \ 103b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, undetectable_string_map, UndetectableStringMap) \ 104b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, undetectable_one_byte_string_map, UndetectableOneByteStringMap) \ 105b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_int8_array_map, ExternalInt8ArrayMap) \ 106b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_uint8_array_map, ExternalUint8ArrayMap) \ 107b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_int16_array_map, ExternalInt16ArrayMap) \ 108b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_uint16_array_map, ExternalUint16ArrayMap) \ 109b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_int32_array_map, ExternalInt32ArrayMap) \ 110b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_uint32_array_map, ExternalUint32ArrayMap) \ 111b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_float32_array_map, ExternalFloat32ArrayMap) \ 112b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_float64_array_map, ExternalFloat64ArrayMap) \ 113b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_uint8_clamped_array_map, ExternalUint8ClampedArrayMap) \ 114b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ExternalArray, empty_external_int8_array, EmptyExternalInt8Array) \ 115b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ExternalArray, empty_external_uint8_array, EmptyExternalUint8Array) \ 116b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ExternalArray, empty_external_int16_array, EmptyExternalInt16Array) \ 117b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ExternalArray, empty_external_uint16_array, EmptyExternalUint16Array) \ 118b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ExternalArray, empty_external_int32_array, EmptyExternalInt32Array) \ 119b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ExternalArray, empty_external_uint32_array, EmptyExternalUint32Array) \ 120b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ExternalArray, empty_external_float32_array, EmptyExternalFloat32Array) \ 121b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ExternalArray, empty_external_float64_array, EmptyExternalFloat64Array) \ 122b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ExternalArray, empty_external_uint8_clamped_array, \ 123b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch EmptyExternalUint8ClampedArray) \ 124b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_uint8_array_map, FixedUint8ArrayMap) \ 125b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_int8_array_map, FixedInt8ArrayMap) \ 126b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_uint16_array_map, FixedUint16ArrayMap) \ 127b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_int16_array_map, FixedInt16ArrayMap) \ 128b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_uint32_array_map, FixedUint32ArrayMap) \ 129b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_int32_array_map, FixedInt32ArrayMap) \ 130b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_float32_array_map, FixedFloat32ArrayMap) \ 131b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_float64_array_map, FixedFloat64ArrayMap) \ 132b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, fixed_uint8_clamped_array_map, FixedUint8ClampedArrayMap) \ 133b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedTypedArrayBase, empty_fixed_uint8_array, EmptyFixedUint8Array) \ 134b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedTypedArrayBase, empty_fixed_int8_array, EmptyFixedInt8Array) \ 135b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedTypedArrayBase, empty_fixed_uint16_array, EmptyFixedUint16Array) \ 136b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedTypedArrayBase, empty_fixed_int16_array, EmptyFixedInt16Array) \ 137b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedTypedArrayBase, empty_fixed_uint32_array, EmptyFixedUint32Array) \ 138b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedTypedArrayBase, empty_fixed_int32_array, EmptyFixedInt32Array) \ 139b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedTypedArrayBase, empty_fixed_float32_array, EmptyFixedFloat32Array) \ 140b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedTypedArrayBase, empty_fixed_float64_array, EmptyFixedFloat64Array) \ 141b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedTypedArrayBase, empty_fixed_uint8_clamped_array, \ 142b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch EmptyFixedUint8ClampedArray) \ 143b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, sloppy_arguments_elements_map, SloppyArgumentsElementsMap) \ 144b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, function_context_map, FunctionContextMap) \ 145b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, catch_context_map, CatchContextMap) \ 146b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, with_context_map, WithContextMap) \ 147b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, block_context_map, BlockContextMap) \ 148b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, module_context_map, ModuleContextMap) \ 149b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, global_context_map, GlobalContextMap) \ 150b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, undefined_map, UndefinedMap) \ 151b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, the_hole_map, TheHoleMap) \ 152b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, null_map, NullMap) \ 153b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, boolean_map, BooleanMap) \ 154b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, uninitialized_map, UninitializedMap) \ 155b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, arguments_marker_map, ArgumentsMarkerMap) \ 156b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, no_interceptor_result_sentinel_map, NoInterceptorResultSentinelMap) \ 157b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, exception_map, ExceptionMap) \ 158b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, termination_exception_map, TerminationExceptionMap) \ 159b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, message_object_map, JSMessageObjectMap) \ 160b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, foreign_map, ForeignMap) \ 161b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(HeapNumber, nan_value, NanValue) \ 162b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(HeapNumber, infinity_value, InfinityValue) \ 163b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(HeapNumber, minus_zero_value, MinusZeroValue) \ 164b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, neander_map, NeanderMap) \ 165b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(JSObject, message_listeners, MessageListeners) \ 166b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(UnseededNumberDictionary, code_stubs, CodeStubs) \ 167b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(UnseededNumberDictionary, non_monomorphic_cache, NonMonomorphicCache) \ 168b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(PolymorphicCodeCache, polymorphic_code_cache, PolymorphicCodeCache) \ 169b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Code, js_entry_code, JsEntryCode) \ 170b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Code, js_construct_entry_code, JsConstructEntryCode) \ 171b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedArray, natives_source_cache, NativesSourceCache) \ 172b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Script, empty_script, EmptyScript) \ 173b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(NameDictionary, intrinsic_function_names, IntrinsicFunctionNames) \ 174b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Cell, undefined_cell, UndefineCell) \ 175b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(JSObject, observation_state, ObservationState) \ 176b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map, external_map, ExternalMap) \ 177b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Object, symbol_registry, SymbolRegistry) \ 178b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, frozen_symbol, FrozenSymbol) \ 179b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, nonexistent_symbol, NonExistentSymbol) \ 180b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, elements_transition_symbol, ElementsTransitionSymbol) \ 181b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(SeededNumberDictionary, empty_slow_element_dictionary, \ 182b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch EmptySlowElementDictionary) \ 183b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, observed_symbol, ObservedSymbol) \ 184b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, uninitialized_symbol, UninitializedSymbol) \ 185b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, megamorphic_symbol, MegamorphicSymbol) \ 186b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, premonomorphic_symbol, PremonomorphicSymbol) \ 187b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, generic_symbol, GenericSymbol) \ 188b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, stack_trace_symbol, StackTraceSymbol) \ 189b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, detailed_stack_trace_symbol, DetailedStackTraceSymbol) \ 190b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, normal_ic_symbol, NormalICSymbol) \ 191b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol, home_object_symbol, HomeObjectSymbol) \ 192b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedArray, materialized_objects, MaterializedObjects) \ 193b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedArray, allocation_sites_scratchpad, AllocationSitesScratchpad) \ 194b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(FixedArray, microtask_queue, MicrotaskQueue) 195b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 196b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Entries in this list are limited to Smis and are not visited during GC. 197b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define SMI_ROOT_LIST(V) \ 198b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Smi, stack_limit, StackLimit) \ 199b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Smi, real_stack_limit, RealStackLimit) \ 200b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Smi, last_script_id, LastScriptId) \ 201b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Smi, arguments_adaptor_deopt_pc_offset, ArgumentsAdaptorDeoptPCOffset) \ 202b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Smi, construct_stub_deopt_pc_offset, ConstructStubDeoptPCOffset) \ 203b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Smi, getter_stub_deopt_pc_offset, GetterStubDeoptPCOffset) \ 204b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Smi, setter_stub_deopt_pc_offset, SetterStubDeoptPCOffset) 205b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 206b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define ROOT_LIST(V) \ 207b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STRONG_ROOT_LIST(V) \ 208b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch SMI_ROOT_LIST(V) \ 209b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(StringTable, string_table, StringTable) 210b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 211b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Heap roots that are known to be immortal immovable, for which we can safely 212b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// skip write barriers. 213b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define IMMORTAL_IMMOVABLE_ROOT_LIST(V) \ 214b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(byte_array_map) \ 215b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(free_space_map) \ 216b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(one_pointer_filler_map) \ 217b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(two_pointer_filler_map) \ 218b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(undefined_value) \ 219b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(the_hole_value) \ 220b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(null_value) \ 221b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(true_value) \ 222b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(false_value) \ 223b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(uninitialized_value) \ 224b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(cell_map) \ 225b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(global_property_cell_map) \ 226b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(shared_function_info_map) \ 227b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(meta_map) \ 228b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(heap_number_map) \ 229b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(mutable_heap_number_map) \ 230b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(native_context_map) \ 231b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(fixed_array_map) \ 232b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(code_map) \ 233b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(scope_info_map) \ 234b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(fixed_cow_array_map) \ 235b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(fixed_double_array_map) \ 236b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(constant_pool_array_map) \ 237b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(no_interceptor_result_sentinel) \ 238b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(hash_table_map) \ 239b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ordered_hash_table_map) \ 240b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(empty_fixed_array) \ 241b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(empty_byte_array) \ 242b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(empty_descriptor_array) \ 243b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(empty_constant_pool_array) \ 244b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(arguments_marker) \ 245b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(symbol_map) \ 246b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(sloppy_arguments_elements_map) \ 247b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(function_context_map) \ 248b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(catch_context_map) \ 249b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(with_context_map) \ 250b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(block_context_map) \ 251b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(module_context_map) \ 252b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(global_context_map) \ 253b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(undefined_map) \ 254b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(the_hole_map) \ 255b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(null_map) \ 256b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(boolean_map) \ 257b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(uninitialized_map) \ 258b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(message_object_map) \ 259b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(foreign_map) \ 260b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(neander_map) 261b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 262b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define INTERNALIZED_STRING_LIST(V) \ 263b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Object_string, "Object") \ 264b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(proto_string, "__proto__") \ 265b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(arguments_string, "arguments") \ 266b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Arguments_string, "Arguments") \ 267b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(caller_string, "caller") \ 268b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(boolean_string, "boolean") \ 269b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Boolean_string, "Boolean") \ 270b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(callee_string, "callee") \ 271b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(constructor_string, "constructor") \ 272b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(dot_result_string, ".result") \ 273b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(dot_for_string, ".for.") \ 274b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(eval_string, "eval") \ 275b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(empty_string, "") \ 276b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(function_string, "function") \ 277b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Function_string, "Function") \ 278b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(length_string, "length") \ 279b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(name_string, "name") \ 280b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(null_string, "null") \ 281b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(number_string, "number") \ 282b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Number_string, "Number") \ 283b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(nan_string, "NaN") \ 284b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(source_string, "source") \ 285b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(source_url_string, "source_url") \ 286b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(source_mapping_url_string, "source_mapping_url") \ 287b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(global_string, "global") \ 288b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(ignore_case_string, "ignoreCase") \ 289b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(multiline_string, "multiline") \ 290b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(sticky_string, "sticky") \ 291b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(harmony_regexps_string, "harmony_regexps") \ 292b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(input_string, "input") \ 293b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(index_string, "index") \ 294b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(last_index_string, "lastIndex") \ 295b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(object_string, "object") \ 296b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(prototype_string, "prototype") \ 297b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(string_string, "string") \ 298b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(String_string, "String") \ 299b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(symbol_string, "symbol") \ 300b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Symbol_string, "Symbol") \ 301b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Map_string, "Map") \ 302b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Set_string, "Set") \ 303b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(WeakMap_string, "WeakMap") \ 304b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(WeakSet_string, "WeakSet") \ 305b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(for_string, "for") \ 306b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(for_api_string, "for_api") \ 307b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(for_intern_string, "for_intern") \ 308b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(private_api_string, "private_api") \ 309b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(private_intern_string, "private_intern") \ 310b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Date_string, "Date") \ 311b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(char_at_string, "CharAt") \ 312b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(undefined_string, "undefined") \ 313b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(value_of_string, "valueOf") \ 314b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(stack_string, "stack") \ 315b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(toJSON_string, "toJSON") \ 316b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(KeyedLoadMonomorphic_string, "KeyedLoadMonomorphic") \ 317b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(KeyedStoreMonomorphic_string, "KeyedStoreMonomorphic") \ 318b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(stack_overflow_string, "kStackOverflowBoilerplate") \ 319b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(illegal_access_string, "illegal access") \ 320b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(cell_value_string, "%cell_value") \ 321b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(illegal_argument_string, "illegal argument") \ 322b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(identity_hash_string, "v8::IdentityHash") \ 323b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(closure_string, "(closure)") \ 324b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(dot_string, ".") \ 325b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(compare_ic_string, "==") \ 326b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(strict_compare_ic_string, "===") \ 327b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(infinity_string, "Infinity") \ 328b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(minus_infinity_string, "-Infinity") \ 329b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(query_colon_string, "(?:)") \ 330b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(Generator_string, "Generator") \ 331b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(throw_string, "throw") \ 332b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(done_string, "done") \ 333b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(value_string, "value") \ 334b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(next_string, "next") \ 335b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(byte_length_string, "byteLength") \ 336b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(byte_offset_string, "byteOffset") \ 337b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(intl_initialized_marker_string, "v8::intl_initialized_marker") \ 338b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch V(intl_impl_object_string, "v8::intl_object") 339b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 340b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Forward declarations. 341b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass HeapStats; 342b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass Isolate; 343b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass WeakObjectRetainer; 344b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 345b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 346b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochtypedef String* (*ExternalStringTableUpdaterCallback)(Heap* heap, 347b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object** pointer); 348b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 349b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass StoreBufferRebuilder { 350b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 351b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit StoreBufferRebuilder(StoreBuffer* store_buffer) 352b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch : store_buffer_(store_buffer) {} 353b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 354b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Callback(MemoryChunk* page, StoreBufferEvent event); 355b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 356b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 357b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch StoreBuffer* store_buffer_; 358b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 359b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // We record in this variable how full the store buffer was when we started 360b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // iterating over the current page, finding pointers to new space. If the 361b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // store buffer overflows again we can exempt the page from the store buffer 362b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // by rewinding to this point instead of having to search the store buffer. 363b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object*** start_of_current_page_; 364b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The current page we are scanning in the store buffer iterator. 365b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MemoryChunk* current_page_; 366b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 367b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 368b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 369b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// A queue of objects promoted during scavenge. Each object is accompanied 370b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// by it's size to avoid dereferencing a map pointer for scanning. 371b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass PromotionQueue { 372b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 373b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit PromotionQueue(Heap* heap) 374b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch : front_(NULL), 375b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch rear_(NULL), 376b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch limit_(NULL), 377b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch emergency_stack_(0), 378b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch heap_(heap) {} 379b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 380b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Initialize(); 381b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 382b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Destroy() { 383b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(is_empty()); 384b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch delete emergency_stack_; 385b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch emergency_stack_ = NULL; 386b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 387b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 388b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Page* GetHeadPage() { 389b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return Page::FromAllocationTop(reinterpret_cast<Address>(rear_)); 390b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 391b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 392b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void SetNewLimit(Address limit) { 393b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch limit_ = reinterpret_cast<intptr_t*>(limit); 394b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 395b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (limit_ <= rear_) { 396b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return; 397b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 398b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 399b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RelocateQueueHead(); 400b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 401b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 402b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool IsBelowPromotionQueue(Address to_space_top) { 403b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // If the given to-space top pointer and the head of the promotion queue 404b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // are not on the same page, then the to-space objects are below the 405b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // promotion queue. 406b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (GetHeadPage() != Page::FromAddress(to_space_top)) { 407b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return true; 408b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 409b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // If the to space top pointer is smaller or equal than the promotion 410b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // queue head, then the to-space objects are below the promotion queue. 411b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return reinterpret_cast<intptr_t*>(to_space_top) <= rear_; 412b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 413b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 414b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool is_empty() { 415b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return (front_ == rear_) && 416b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch (emergency_stack_ == NULL || emergency_stack_->length() == 0); 417b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 418b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 419b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void insert(HeapObject* target, int size); 420b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 421b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void remove(HeapObject** target, int* size) { 422b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!is_empty()); 423b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (front_ == rear_) { 424b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Entry e = emergency_stack_->RemoveLast(); 425b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch *target = e.obj_; 426b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch *size = e.size_; 427b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return; 428b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 429b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 430b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (NewSpacePage::IsAtStart(reinterpret_cast<Address>(front_))) { 431b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NewSpacePage* front_page = 432b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NewSpacePage::FromAddress(reinterpret_cast<Address>(front_)); 433b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!front_page->prev_page()->is_anchor()); 434b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch front_ = reinterpret_cast<intptr_t*>(front_page->prev_page()->area_end()); 435b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 436b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch *target = reinterpret_cast<HeapObject*>(*(--front_)); 437b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch *size = static_cast<int>(*(--front_)); 438b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Assert no underflow. 439b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch SemiSpace::AssertValidRange(reinterpret_cast<Address>(rear_), 440b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch reinterpret_cast<Address>(front_)); 441b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 442b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 443b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 444b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The front of the queue is higher in the memory page chain than the rear. 445b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* front_; 446b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* rear_; 447b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* limit_; 448b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 449b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kEntrySizeInWords = 2; 450b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 451b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch struct Entry { 452b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Entry(HeapObject* obj, int size) : obj_(obj), size_(size) {} 453b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 454b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObject* obj_; 455b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int size_; 456b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 457b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch List<Entry>* emergency_stack_; 458b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 459b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap_; 460b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 461b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void RelocateQueueHead(); 462b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 463b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DISALLOW_COPY_AND_ASSIGN(PromotionQueue); 464b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 465b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 466b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 467b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochtypedef void (*ScavengingCallback)(Map* map, HeapObject** slot, 468b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObject* object); 469b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 470b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 471b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// External strings table is a place where all external strings are 472b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// registered. We need to keep track of such strings to properly 473b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// finalize them. 474b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass ExternalStringTable { 475b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 476b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Registers an external string. 477b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void AddString(String* string); 478b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 479b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void Iterate(ObjectVisitor* v); 480b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 481b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Restores internal invariant and gets rid of collected strings. 482b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Must be called after each Iterate() that modified the strings. 483b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CleanUp(); 484b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 485b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Destroys all allocated memory. 486b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void TearDown(); 487b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 488b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 489b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit ExternalStringTable(Heap* heap) : heap_(heap) {} 490b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 491b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class Heap; 492b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 493b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void Verify(); 494b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 495b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void AddOldString(String* string); 496b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 497b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Notifies the table that only a prefix of the new list is valid. 498b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void ShrinkNewStrings(int position); 499b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 500b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // To speed up scavenge collections new space string are kept 501b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // separate from old space strings. 502b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch List<Object*> new_space_strings_; 503b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch List<Object*> old_space_strings_; 504b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 505b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap_; 506b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 507b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DISALLOW_COPY_AND_ASSIGN(ExternalStringTable); 508b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 509b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 510b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 511b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochenum ArrayStorageAllocationMode { 512b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DONT_INITIALIZE_ARRAY_ELEMENTS, 513b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE 514b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 515b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 516b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 517b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass Heap { 518b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 519b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Configure heap size in MB before setup. Return false if the heap has been 520b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // set up already. 521b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool ConfigureHeap(int max_semi_space_size, int max_old_space_size, 522b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int max_executable_size, size_t code_range_size); 523b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool ConfigureHeapDefault(); 524b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 525b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Prepares the heap, setting up memory areas that are needed in the isolate 526b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // without actually creating any objects. 527b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool SetUp(); 528b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 529b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Bootstraps the object heap with the core set of objects required to run. 530b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns whether it succeeded. 531b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool CreateHeapObjects(); 532b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 533b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Destroys all memory allocated by the heap. 534b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void TearDown(); 535b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 536b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Set the stack limit in the roots_ array. Some architectures generate 537b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // code that looks here, because it is faster than loading from the static 538b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // jslimit_/real_jslimit_ variable in the StackGuard. 539b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void SetStackLimits(); 540b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 541b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns whether SetUp has been called. 542b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool HasBeenSetUp(); 543b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 544b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns the maximum amount of memory reserved for the heap. For 545b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // the young generation, we reserve 4 times the amount needed for a 546b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // semi space. The young generation consists of two semi spaces and 547b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // we reserve twice the amount needed for those in order to ensure 548b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // that new space can be aligned to its size. 549b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t MaxReserved() { 550b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return 4 * reserved_semispace_size_ + max_old_generation_size_; 551b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 552b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int MaxSemiSpaceSize() { return max_semi_space_size_; } 553b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int ReservedSemiSpaceSize() { return reserved_semispace_size_; } 554b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int InitialSemiSpaceSize() { return initial_semispace_size_; } 555b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t MaxOldGenerationSize() { return max_old_generation_size_; } 556b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t MaxExecutableSize() { return max_executable_size_; } 557b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 558b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns the capacity of the heap in bytes w/o growing. Heap grows when 559b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // more spaces are needed until it reaches the limit. 560b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t Capacity(); 561b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 562b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns the amount of memory currently committed for the heap. 563b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t CommittedMemory(); 564b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 565b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns the amount of executable memory currently committed for the heap. 566b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t CommittedMemoryExecutable(); 567b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 568b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns the amount of phyical memory currently committed for the heap. 569b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch size_t CommittedPhysicalMemory(); 570b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 571b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns the maximum amount of memory ever committed for the heap. 572b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t MaximumCommittedMemory() { return maximum_committed_; } 573b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 574b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Updates the maximum committed memory for the heap. Should be called 575b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // whenever a space grows. 576b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void UpdateMaximumCommitted(); 577b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 578b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns the available bytes in space w/o growing. 579b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Heap doesn't guarantee that it can allocate an object that requires 580b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // all available bytes. Check MaxHeapObjectSize() instead. 581b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t Available(); 582b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 583b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns of size of all objects residing in the heap. 584b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t SizeOfObjects(); 585b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 586b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Return the starting address and a mask for the new space. And-masking an 587b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // address with the mask will result in the start address of the new space 588b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // for all addresses in either semispace. 589b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address NewSpaceStart() { return new_space_.start(); } 590b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uintptr_t NewSpaceMask() { return new_space_.mask(); } 591b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address NewSpaceTop() { return new_space_.top(); } 592b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 593b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NewSpace* new_space() { return &new_space_; } 594b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch OldSpace* old_pointer_space() { return old_pointer_space_; } 595b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch OldSpace* old_data_space() { return old_data_space_; } 596b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch OldSpace* code_space() { return code_space_; } 597b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MapSpace* map_space() { return map_space_; } 598b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch CellSpace* cell_space() { return cell_space_; } 599b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PropertyCellSpace* property_cell_space() { return property_cell_space_; } 600b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch LargeObjectSpace* lo_space() { return lo_space_; } 601b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PagedSpace* paged_space(int idx) { 602b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch switch (idx) { 603b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch case OLD_POINTER_SPACE: 604b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return old_pointer_space(); 605b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch case OLD_DATA_SPACE: 606b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return old_data_space(); 607b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch case MAP_SPACE: 608b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return map_space(); 609b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch case CELL_SPACE: 610b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return cell_space(); 611b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch case PROPERTY_CELL_SPACE: 612b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return property_cell_space(); 613b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch case CODE_SPACE: 614b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return code_space(); 615b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch case NEW_SPACE: 616b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch case LO_SPACE: 617b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch UNREACHABLE(); 618b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 619b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return NULL; 620b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 621b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 622b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool always_allocate() { return always_allocate_scope_depth_ != 0; } 623b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address always_allocate_scope_depth_address() { 624b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return reinterpret_cast<Address>(&always_allocate_scope_depth_); 625b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 626b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 627b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address* NewSpaceAllocationTopAddress() { 628b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return new_space_.allocation_top_address(); 629b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 630b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address* NewSpaceAllocationLimitAddress() { 631b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return new_space_.allocation_limit_address(); 632b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 633b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 634b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address* OldPointerSpaceAllocationTopAddress() { 635b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return old_pointer_space_->allocation_top_address(); 636b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 637b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address* OldPointerSpaceAllocationLimitAddress() { 638b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return old_pointer_space_->allocation_limit_address(); 639b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 640b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 641b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address* OldDataSpaceAllocationTopAddress() { 642b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return old_data_space_->allocation_top_address(); 643b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 644b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address* OldDataSpaceAllocationLimitAddress() { 645b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return old_data_space_->allocation_limit_address(); 646b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 647b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 648b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns a deep copy of the JavaScript object. 649b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Properties and elements are copied too. 650b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Optionally takes an AllocationSite to be appended in an AllocationMemento. 651b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 652b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch CopyJSObject(JSObject* source, AllocationSite* site = NULL); 653b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 654b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Clear the Instanceof cache (used when a prototype changes). 655b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void ClearInstanceofCache(); 656b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 657b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Iterates the whole code space to clear all ICs of the given kind. 658b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ClearAllICsByKind(Code::Kind kind); 659b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 660b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // For use during bootup. 661b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void RepairFreeListsAfterBoot(); 662b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 663b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch template <typename T> 664b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline bool IsOneByte(T t, int chars); 665b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 666b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Move len elements within a given array from src_index index to dst_index 667b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // index. 668b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void MoveElements(FixedArray* array, int dst_index, int src_index, int len); 669b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 670b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Sloppy mode arguments object size. 671b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kSloppyArgumentsObjectSize = 672b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch JSObject::kHeaderSize + 2 * kPointerSize; 673b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Strict mode arguments has no callee so it is smaller. 674b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kStrictArgumentsObjectSize = 675b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch JSObject::kHeaderSize + 1 * kPointerSize; 676b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Indicies for direct access into argument objects. 677b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kArgumentsLengthIndex = 0; 678b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // callee is only valid in sloppy mode. 679b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kArgumentsCalleeIndex = 1; 680b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 681b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Finalizes an external string by deleting the associated external 682b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // data and clearing the resource pointer. 683b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void FinalizeExternalString(String* string); 684b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 685b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Initialize a filler object to keep the ability to iterate over the heap 686b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // when introducing gaps within pages. 687b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CreateFillerObjectAt(Address addr, int size); 688b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 689b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool CanMoveObjectStart(HeapObject* object); 690b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 691b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Indicates whether live bytes adjustment is triggered from within the GC 692b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // code or from mutator code. 693b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch enum InvocationMode { FROM_GC, FROM_MUTATOR }; 694b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 695b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Maintain consistency of live bytes during incremental marking. 696b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void AdjustLiveBytes(Address address, int by, InvocationMode mode); 697b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 698b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Trim the given array from the left. Note that this relocates the object 699b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // start and hence is only valid if there is only a single reference to it. 700b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FixedArrayBase* LeftTrimFixedArray(FixedArrayBase* obj, int elements_to_trim); 701b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 702b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Trim the given array from the right. 703b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch template<Heap::InvocationMode mode> 704b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void RightTrimFixedArray(FixedArrayBase* obj, int elements_to_trim); 705b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 706b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Converts the given boolean condition to JavaScript boolean value. 707b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline Object* ToBoolean(bool condition); 708b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 709b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Performs garbage collection operation. 710b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns whether there is a chance that another major GC could 711b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // collect more garbage. 712b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool CollectGarbage( 713b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocationSpace space, const char* gc_reason = NULL, 714b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const GCCallbackFlags gc_callback_flags = kNoGCCallbackFlags); 715b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 716b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kNoGCFlags = 0; 717b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kReduceMemoryFootprintMask = 1; 718b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kAbortIncrementalMarkingMask = 2; 719b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 720b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Making the heap iterable requires us to abort incremental marking. 721b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMakeHeapIterableMask = kAbortIncrementalMarkingMask; 722b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 723b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Performs a full garbage collection. If (flags & kMakeHeapIterableMask) is 724b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // non-zero, then the slower precise sweeper is used, which leaves the heap 725b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // in a state where we can iterate over the heap visiting all objects. 726b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CollectAllGarbage( 727b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int flags, const char* gc_reason = NULL, 728b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const GCCallbackFlags gc_callback_flags = kNoGCCallbackFlags); 729b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 730b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Last hope GC, should try to squeeze as much as possible. 731b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CollectAllAvailableGarbage(const char* gc_reason = NULL); 732b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 733b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Check whether the heap is currently iterable. 734b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool IsHeapIterable(); 735b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 736b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Notify the heap that a context has been disposed. 737b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int NotifyContextDisposed(); 738b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 739b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void increment_scan_on_scavenge_pages() { 740b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch scan_on_scavenge_pages_++; 741b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (FLAG_gc_verbose) { 742b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PrintF("Scan-on-scavenge pages: %d\n", scan_on_scavenge_pages_); 743b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 744b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 745b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 746b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void decrement_scan_on_scavenge_pages() { 747b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch scan_on_scavenge_pages_--; 748b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (FLAG_gc_verbose) { 749b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PrintF("Scan-on-scavenge pages: %d\n", scan_on_scavenge_pages_); 750b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 751b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 752b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 753b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PromotionQueue* promotion_queue() { return &promotion_queue_; } 754b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 755b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void AddGCPrologueCallback(v8::Isolate::GCPrologueCallback callback, 756b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCType gc_type_filter, bool pass_isolate = true); 757b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void RemoveGCPrologueCallback(v8::Isolate::GCPrologueCallback callback); 758b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 759b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void AddGCEpilogueCallback(v8::Isolate::GCEpilogueCallback callback, 760b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCType gc_type_filter, bool pass_isolate = true); 761b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void RemoveGCEpilogueCallback(v8::Isolate::GCEpilogueCallback callback); 762b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 763b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Heap root getters. We have versions with and without type::cast() here. 764b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// You can't use type::cast during GC because the assert fails. 765b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// TODO(1490): Try removing the unchecked accessors, now that GC marking does 766b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// not corrupt the map. 767b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define ROOT_ACCESSOR(type, name, camel_name) \ 768b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch type* name() { return type::cast(roots_[k##camel_name##RootIndex]); } \ 769b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch type* raw_unchecked_##name() { \ 770b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return reinterpret_cast<type*>(roots_[k##camel_name##RootIndex]); \ 771b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 772b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ROOT_LIST(ROOT_ACCESSOR) 773b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#undef ROOT_ACCESSOR 774b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 775b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Utility type maps 776b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define STRUCT_MAP_ACCESSOR(NAME, Name, name) \ 777b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Map* name##_map() { return Map::cast(roots_[k##Name##MapRootIndex]); } 778b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STRUCT_LIST(STRUCT_MAP_ACCESSOR) 779b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#undef STRUCT_MAP_ACCESSOR 780b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 781b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define STRING_ACCESSOR(name, str) \ 782b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch String* name() { return String::cast(roots_[k##name##RootIndex]); } 783b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch INTERNALIZED_STRING_LIST(STRING_ACCESSOR) 784b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#undef STRING_ACCESSOR 785b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 786b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The hidden_string is special because it is the empty string, but does 787b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // not match the empty string. 788b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch String* hidden_string() { return hidden_string_; } 789b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 790b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_native_contexts_list(Object* object) { 791b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch native_contexts_list_ = object; 792b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 793b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* native_contexts_list() const { return native_contexts_list_; } 794b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 795b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_array_buffers_list(Object* object) { array_buffers_list_ = object; } 796b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* array_buffers_list() const { return array_buffers_list_; } 797b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 798b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_allocation_sites_list(Object* object) { 799b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch allocation_sites_list_ = object; 800b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 801b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* allocation_sites_list() { return allocation_sites_list_; } 802b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 803b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Used in CreateAllocationSiteStub and the (de)serializer. 804b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object** allocation_sites_list_address() { return &allocation_sites_list_; } 805b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 806b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* weak_object_to_code_table() { return weak_object_to_code_table_; } 807b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 808b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_encountered_weak_collections(Object* weak_collection) { 809b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch encountered_weak_collections_ = weak_collection; 810b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 811b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* encountered_weak_collections() const { 812b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return encountered_weak_collections_; 813b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 814b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 815b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Number of mark-sweeps. 816b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch unsigned int ms_count() { return ms_count_; } 817b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 818b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Iterates over all roots in the heap. 819b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void IterateRoots(ObjectVisitor* v, VisitMode mode); 820b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Iterates over all strong roots in the heap. 821b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void IterateStrongRoots(ObjectVisitor* v, VisitMode mode); 822b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Iterates over entries in the smi roots list. Only interesting to the 823b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // serializer/deserializer, since GC does not care about smis. 824b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void IterateSmiRoots(ObjectVisitor* v); 825b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Iterates over all the other roots in the heap. 826b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void IterateWeakRoots(ObjectVisitor* v, VisitMode mode); 827b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 828b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Iterate pointers to from semispace of new space found in memory interval 829b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // from start to end. 830b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void IterateAndMarkPointersToFromSpace(Address start, Address end, 831b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectSlotCallback callback); 832b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 833b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns whether the object resides in new space. 834b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool InNewSpace(Object* object); 835b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool InNewSpace(Address address); 836b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool InNewSpacePage(Address address); 837b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool InFromSpace(Object* object); 838b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool InToSpace(Object* object); 839b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 840b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns whether the object resides in old pointer space. 841b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool InOldPointerSpace(Address address); 842b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool InOldPointerSpace(Object* object); 843b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 844b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns whether the object resides in old data space. 845b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool InOldDataSpace(Address address); 846b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool InOldDataSpace(Object* object); 847b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 848b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Checks whether an address/object in the heap (including auxiliary 849b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // area and unused area). 850b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool Contains(Address addr); 851b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool Contains(HeapObject* value); 852b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 853b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Checks whether an address/object in a space. 854b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Currently used by tests, serialization and heap verification only. 855b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool InSpace(Address addr, AllocationSpace space); 856b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool InSpace(HeapObject* value, AllocationSpace space); 857b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 858b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Finds out which space an object should get promoted to based on its type. 859b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline OldSpace* TargetSpace(HeapObject* object); 860b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline AllocationSpace TargetSpaceId(InstanceType type); 861b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 862b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Checks whether the given object is allowed to be migrated from it's 863b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // current space into the given destination space. Used for debugging. 864b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool AllowedToBeMigrated(HeapObject* object, AllocationSpace dest); 865b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 866b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Sets the stub_cache_ (only used when expanding the dictionary). 867b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void public_set_code_stubs(UnseededNumberDictionary* value) { 868b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch roots_[kCodeStubsRootIndex] = value; 869b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 870b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 871b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Support for computing object sizes for old objects during GCs. Returns 872b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // a function that is guaranteed to be safe for computing object sizes in 873b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // the current GC phase. 874b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObjectCallback GcSafeSizeOfOldObjectFunction() { 875b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return gc_safe_size_of_old_object_; 876b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 877b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 878b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Sets the non_monomorphic_cache_ (only used when expanding the dictionary). 879b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void public_set_non_monomorphic_cache(UnseededNumberDictionary* value) { 880b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch roots_[kNonMonomorphicCacheRootIndex] = value; 881b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 882b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 883b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void public_set_empty_script(Script* script) { 884b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch roots_[kEmptyScriptRootIndex] = script; 885b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 886b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 887b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void public_set_store_buffer_top(Address* top) { 888b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch roots_[kStoreBufferTopRootIndex] = reinterpret_cast<Smi*>(top); 889b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 890b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 891b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void public_set_materialized_objects(FixedArray* objects) { 892b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch roots_[kMaterializedObjectsRootIndex] = objects; 893b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 894b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 895b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Generated code can embed this address to get access to the roots. 896b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object** roots_array_start() { return roots_; } 897b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 898b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address* store_buffer_top_address() { 899b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return reinterpret_cast<Address*>(&roots_[kStoreBufferTopRootIndex]); 900b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 901b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 902b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef VERIFY_HEAP 903b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Verify the heap is in its normal state before or after a GC. 904b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Verify(); 905b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 906b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 907b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool weak_embedded_objects_verification_enabled() { 908b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return no_weak_object_verification_scope_depth_ == 0; 909b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 910b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif 911b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 912b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef DEBUG 913b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Print(); 914b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void PrintHandles(); 915b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 916b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void OldPointerSpaceCheckStoreBuffer(); 917b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void MapSpaceCheckStoreBuffer(); 918b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void LargeObjectSpaceCheckStoreBuffer(); 919b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 920b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Report heap statistics. 921b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ReportHeapStatistics(const char* title); 922b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ReportCodeStatistics(const char* title); 923b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif 924b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 925b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Zapping is needed for verify heap, and always done in debug builds. 926b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline bool ShouldZapGarbage() { 927b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef DEBUG 928b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return true; 929b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#else 930b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef VERIFY_HEAP 931b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return FLAG_verify_heap; 932b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#else 933b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return false; 934b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif 935b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif 936b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 937b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 938b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Number of "runtime allocations" done so far. 939b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uint32_t allocations_count() { return allocations_count_; } 940b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 941b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns deterministic "time" value in ms. Works only with 942b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // FLAG_verify_predictable. 943b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double synthetic_time() { return allocations_count_ / 2.0; } 944b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 945b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Print short heap statistics. 946b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void PrintShortHeapStatistics(); 947b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 948b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Write barrier support for address[offset] = o. 949b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch INLINE(void RecordWrite(Address address, int offset)); 950b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 951b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Write barrier support for address[start : start + len[ = o. 952b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch INLINE(void RecordWrites(Address address, int start, int len)); 953b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 954b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch enum HeapState { NOT_IN_GC, SCAVENGE, MARK_COMPACT }; 955b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline HeapState gc_state() { return gc_state_; } 956b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 957b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool IsInGCPostProcessing() { return gc_post_processing_depth_ > 0; } 958b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 959b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef DEBUG 960b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_allocation_timeout(int timeout) { allocation_timeout_ = timeout; } 961b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 962b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void TracePathToObjectFrom(Object* target, Object* root); 963b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void TracePathToObject(Object* target); 964b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void TracePathToGlobal(); 965b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif 966b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 967b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Callback function passed to Heap::Iterate etc. Copies an object if 968b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // necessary, the object might be promoted to an old space. The caller must 969b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // ensure the precondition that the object is (a) a heap object and (b) in 970b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // the heap's from space. 971b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline void ScavengePointer(HeapObject** p); 972b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline void ScavengeObject(HeapObject** p, HeapObject* object); 973b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 974b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch enum ScratchpadSlotMode { IGNORE_SCRATCHPAD_SLOT, RECORD_SCRATCHPAD_SLOT }; 975b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 976b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // If an object has an AllocationMemento trailing it, return it, otherwise 977b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // return NULL; 978b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline AllocationMemento* FindAllocationMemento(HeapObject* object); 979b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 980b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // An object may have an AllocationSite associated with it through a trailing 981b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // AllocationMemento. Its feedback should be updated when objects are found 982b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // in the heap. 983b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline void UpdateAllocationSiteFeedback(HeapObject* object, 984b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ScratchpadSlotMode mode); 985b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 986b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Support for partial snapshots. After calling this we have a linear 987b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // space to write objects in each space. 988b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ReserveSpace(int* sizes, Address* addresses); 989b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 990b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // 991b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Support for the API. 992b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // 993b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 994b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CreateApiObjects(); 995b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 996b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline intptr_t PromotedTotalSize() { 997b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int64_t total = PromotedSpaceSizeOfObjects() + PromotedExternalMemorySize(); 998b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (total > kMaxInt) return static_cast<intptr_t>(kMaxInt); 999b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (total < 0) return 0; 1000b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return static_cast<intptr_t>(total); 1001b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1002b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1003b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline intptr_t OldGenerationSpaceAvailable() { 1004b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return old_generation_allocation_limit_ - PromotedTotalSize(); 1005b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1006b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1007b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline intptr_t OldGenerationCapacityAvailable() { 1008b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return max_old_generation_size_ - PromotedTotalSize(); 1009b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1010b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1011b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const intptr_t kMinimumOldGenerationAllocationLimit = 1012b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 8 * (Page::kPageSize > MB ? Page::kPageSize : MB); 1013b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1014b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kPointerMultiplier = i::kPointerSize / 4; 1015b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1016b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The new space size has to be a power of 2. Sizes are in MB. 1017b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxSemiSpaceSizeLowMemoryDevice = 1 * kPointerMultiplier; 1018b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxSemiSpaceSizeMediumMemoryDevice = 4 * kPointerMultiplier; 1019b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxSemiSpaceSizeHighMemoryDevice = 8 * kPointerMultiplier; 1020b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxSemiSpaceSizeHugeMemoryDevice = 8 * kPointerMultiplier; 1021b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1022b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The old space size has to be a multiple of Page::kPageSize. 1023b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Sizes are in MB. 1024b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxOldSpaceSizeLowMemoryDevice = 128 * kPointerMultiplier; 1025b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxOldSpaceSizeMediumMemoryDevice = 1026b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 256 * kPointerMultiplier; 1027b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxOldSpaceSizeHighMemoryDevice = 512 * kPointerMultiplier; 1028b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxOldSpaceSizeHugeMemoryDevice = 700 * kPointerMultiplier; 1029b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1030b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The executable size has to be a multiple of Page::kPageSize. 1031b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Sizes are in MB. 1032b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxExecutableSizeLowMemoryDevice = 96 * kPointerMultiplier; 1033b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxExecutableSizeMediumMemoryDevice = 1034b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 192 * kPointerMultiplier; 1035b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxExecutableSizeHighMemoryDevice = 1036b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 256 * kPointerMultiplier; 1037b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxExecutableSizeHugeMemoryDevice = 1038b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 256 * kPointerMultiplier; 1039b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1040b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t OldGenerationAllocationLimit(intptr_t old_gen_size, 1041b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int freed_global_handles); 1042b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1043b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Indicates whether inline bump-pointer allocation has been disabled. 1044b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool inline_allocation_disabled() { return inline_allocation_disabled_; } 1045b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1046b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Switch whether inline bump-pointer allocation should be used. 1047b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void EnableInlineAllocation(); 1048b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void DisableInlineAllocation(); 1049b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1050b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Implements the corresponding V8 API function. 1051b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool IdleNotification(int idle_time_in_ms); 1052b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1053b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Declare all the root indices. This defines the root list order. 1054b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch enum RootListIndex { 1055b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define ROOT_INDEX_DECLARATION(type, name, camel_name) k##camel_name##RootIndex, 1056b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STRONG_ROOT_LIST(ROOT_INDEX_DECLARATION) 1057b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#undef ROOT_INDEX_DECLARATION 1058b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1059b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define STRING_INDEX_DECLARATION(name, str) k##name##RootIndex, 1060b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch INTERNALIZED_STRING_LIST(STRING_INDEX_DECLARATION) 1061b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#undef STRING_DECLARATION 1062b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1063b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Utility type maps 1064b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define DECLARE_STRUCT_MAP(NAME, Name, name) k##Name##MapRootIndex, 1065b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STRUCT_LIST(DECLARE_STRUCT_MAP) 1066b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#undef DECLARE_STRUCT_MAP 1067b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch kStringTableRootIndex, 1068b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1069b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define ROOT_INDEX_DECLARATION(type, name, camel_name) k##camel_name##RootIndex, 1070b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch SMI_ROOT_LIST(ROOT_INDEX_DECLARATION) 1071b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#undef ROOT_INDEX_DECLARATION 1072b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch kRootListLength, 1073b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch kStrongRootListLength = kStringTableRootIndex, 1074b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch kSmiRootsStart = kStringTableRootIndex + 1 1075b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 1076b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1077b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(kUndefinedValueRootIndex == 1078b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Internals::kUndefinedValueRootIndex); 1079b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(kNullValueRootIndex == Internals::kNullValueRootIndex); 1080b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(kTrueValueRootIndex == Internals::kTrueValueRootIndex); 1081b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(kFalseValueRootIndex == Internals::kFalseValueRootIndex); 1082b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(kempty_stringRootIndex == Internals::kEmptyStringRootIndex); 1083b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1084b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Generated code can embed direct references to non-writable roots if 1085b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // they are in new space. 1086b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static bool RootCanBeWrittenAfterInitialization(RootListIndex root_index); 1087b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Generated code can treat direct references to this root as constant. 1088b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool RootCanBeTreatedAsConstant(RootListIndex root_index); 1089b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1090b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Map* MapForFixedTypedArray(ExternalArrayType array_type); 1091b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RootListIndex RootIndexForFixedTypedArray(ExternalArrayType array_type); 1092b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1093b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Map* MapForExternalArrayType(ExternalArrayType array_type); 1094b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RootListIndex RootIndexForExternalArrayType(ExternalArrayType array_type); 1095b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1096b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RootListIndex RootIndexForEmptyExternalArray(ElementsKind kind); 1097b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RootListIndex RootIndexForEmptyFixedTypedArray(ElementsKind kind); 1098b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ExternalArray* EmptyExternalArrayForMap(Map* map); 1099b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FixedTypedArrayBase* EmptyFixedTypedArrayForMap(Map* map); 1100b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1101b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void RecordStats(HeapStats* stats, bool take_snapshot = false); 1102b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1103b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Copy block of memory from src to dst. Size of block should be aligned 1104b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // by pointer size. 1105b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline void CopyBlock(Address dst, Address src, int byte_size); 1106b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1107b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Optimized version of memmove for blocks with pointer size aligned sizes and 1108b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // pointer size aligned addresses. 1109b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline void MoveBlock(Address dst, Address src, int byte_size); 1110b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1111b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Check new space expansion criteria and expand semispaces if it was hit. 1112b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CheckNewSpaceExpansionCriteria(); 1113b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1114b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void IncrementPromotedObjectsSize(int object_size) { 1115b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(object_size > 0); 1116b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch promoted_objects_size_ += object_size; 1117b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1118b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1119b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void IncrementSemiSpaceCopiedObjectSize(int object_size) { 1120b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(object_size > 0); 1121b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch semi_space_copied_object_size_ += object_size; 1122b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1123b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1124b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void IncrementNodesDiedInNewSpace() { nodes_died_in_new_space_++; } 1125b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1126b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void IncrementNodesCopiedInNewSpace() { nodes_copied_in_new_space_++; } 1127b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1128b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void IncrementNodesPromoted() { nodes_promoted_++; } 1129b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1130b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void IncrementYoungSurvivorsCounter(int survived) { 1131b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(survived >= 0); 1132b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch survived_since_last_expansion_ += survived; 1133b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1134b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1135b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool NextGCIsLikelyToBeFull() { 1136b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (FLAG_gc_global) return true; 1137b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1138b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (FLAG_stress_compaction && (gc_count_ & 1) != 0) return true; 1139b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1140b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t adjusted_allocation_limit = 1141b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch old_generation_allocation_limit_ - new_space_.Capacity(); 1142b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1143b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (PromotedTotalSize() >= adjusted_allocation_limit) return true; 1144b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1145b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return false; 1146b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1147b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1148b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void UpdateNewSpaceReferencesInExternalStringTable( 1149b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ExternalStringTableUpdaterCallback updater_func); 1150b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1151b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void UpdateReferencesInExternalStringTable( 1152b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ExternalStringTableUpdaterCallback updater_func); 1153b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1154b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ProcessWeakReferences(WeakObjectRetainer* retainer); 1155b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1156b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void VisitExternalResources(v8::ExternalResourceVisitor* visitor); 1157b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1158b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // An object should be promoted if the object has survived a 1159b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // scavenge operation. 1160b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool ShouldBePromoted(Address old_address, int object_size); 1161b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1162b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ClearJSFunctionResultCaches(); 1163b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1164b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ClearNormalizedMapCaches(); 1165b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1166b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCTracer* tracer() { return &tracer_; } 1167b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1168b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns the size of objects residing in non new spaces. 1169b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t PromotedSpaceSizeOfObjects(); 1170b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1171b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double total_regexp_code_generated() { return total_regexp_code_generated_; } 1172b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void IncreaseTotalRegexpCodeGenerated(int size) { 1173b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch total_regexp_code_generated_ += size; 1174b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1175b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1176b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void IncrementCodeGeneratedBytes(bool is_crankshafted, int size) { 1177b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (is_crankshafted) { 1178b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch crankshaft_codegen_bytes_generated_ += size; 1179b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } else { 1180b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch full_codegen_bytes_generated_ += size; 1181b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1182b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1183b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1184b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Update GC statistics that are tracked on the Heap. 1185b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void UpdateCumulativeGCStatistics(double duration, double spent_in_mutator, 1186b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double marking_time); 1187b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1188b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns maximum GC pause. 1189b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double get_max_gc_pause() { return max_gc_pause_; } 1190b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1191b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns maximum size of objects alive after GC. 1192b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t get_max_alive_after_gc() { return max_alive_after_gc_; } 1193b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1194b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns minimal interval between two subsequent collections. 1195b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double get_min_in_mutator() { return min_in_mutator_; } 1196b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1197b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MarkCompactCollector* mark_compact_collector() { 1198b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return &mark_compact_collector_; 1199b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1200b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1201b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch StoreBuffer* store_buffer() { return &store_buffer_; } 1202b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1203b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Marking* marking() { return &marking_; } 1204b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1205b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch IncrementalMarking* incremental_marking() { return &incremental_marking_; } 1206b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1207b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ExternalStringTable* external_string_table() { 1208b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return &external_string_table_; 1209b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1210b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1211b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns the current sweep generation. 1212b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int sweep_generation() { return sweep_generation_; } 1213b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1214b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline Isolate* isolate(); 1215b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1216b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CallGCPrologueCallbacks(GCType gc_type, GCCallbackFlags flags); 1217b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CallGCEpilogueCallbacks(GCType gc_type, GCCallbackFlags flags); 1218b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1219b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool OldGenerationAllocationLimitReached(); 1220b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1221b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void DoScavengeObject(Map* map, HeapObject** slot, HeapObject* obj) { 1222b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch scavenging_visitors_table_.GetVisitor(map)(map, slot, obj); 1223b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1224b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1225b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void QueueMemoryChunkForFree(MemoryChunk* chunk); 1226b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void FreeQueuedChunks(); 1227b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1228b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int gc_count() const { return gc_count_; } 1229b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1230b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Completely clear the Instanceof cache (to stop it keeping objects alive 1231b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // around a GC). 1232b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void CompletelyClearInstanceofCache(); 1233b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1234b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The roots that have an index less than this are always in old space. 1235b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kOldSpaceRoots = 0x20; 1236b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1237b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uint32_t HashSeed() { 1238b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uint32_t seed = static_cast<uint32_t>(hash_seed()->value()); 1239b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(FLAG_randomize_hashes || seed == 0); 1240b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return seed; 1241b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1242b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1243b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void SetArgumentsAdaptorDeoptPCOffset(int pc_offset) { 1244b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(arguments_adaptor_deopt_pc_offset() == Smi::FromInt(0)); 1245b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_arguments_adaptor_deopt_pc_offset(Smi::FromInt(pc_offset)); 1246b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1247b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1248b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void SetConstructStubDeoptPCOffset(int pc_offset) { 1249b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(construct_stub_deopt_pc_offset() == Smi::FromInt(0)); 1250b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_construct_stub_deopt_pc_offset(Smi::FromInt(pc_offset)); 1251b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1252b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1253b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void SetGetterStubDeoptPCOffset(int pc_offset) { 1254b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(getter_stub_deopt_pc_offset() == Smi::FromInt(0)); 1255b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_getter_stub_deopt_pc_offset(Smi::FromInt(pc_offset)); 1256b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1257b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1258b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void SetSetterStubDeoptPCOffset(int pc_offset) { 1259b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(setter_stub_deopt_pc_offset() == Smi::FromInt(0)); 1260b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_setter_stub_deopt_pc_offset(Smi::FromInt(pc_offset)); 1261b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1262b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1263b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // For post mortem debugging. 1264b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void RememberUnmappedPage(Address page, bool compacted); 1265b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1266b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Global inline caching age: it is incremented on some GCs after context 1267b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // disposal. We use it to flush inline caches. 1268b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int global_ic_age() { return global_ic_age_; } 1269b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1270b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void AgeInlineCaches() { 1271b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch global_ic_age_ = (global_ic_age_ + 1) & SharedFunctionInfo::ICAgeBits::kMax; 1272b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1273b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1274b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool flush_monomorphic_ics() { return flush_monomorphic_ics_; } 1275b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1276b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int64_t amount_of_external_allocated_memory() { 1277b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return amount_of_external_allocated_memory_; 1278b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1279b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1280b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void DeoptMarkedAllocationSites(); 1281b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1282b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool MaximumSizeScavenge() { return maximum_size_scavenges_ > 0; } 1283b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1284b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool DeoptMaybeTenuredAllocationSites() { 1285b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return new_space_.IsAtMaximumCapacity() && maximum_size_scavenges_ == 0; 1286b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1287b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1288b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // ObjectStats are kept in two arrays, counts and sizes. Related stats are 1289b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // stored in a contiguous linear buffer. Stats groups are stored one after 1290b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // another. 1291b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch enum { 1292b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FIRST_CODE_KIND_SUB_TYPE = LAST_TYPE + 1, 1293b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FIRST_FIXED_ARRAY_SUB_TYPE = 1294b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FIRST_CODE_KIND_SUB_TYPE + Code::NUMBER_OF_KINDS, 1295b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FIRST_CODE_AGE_SUB_TYPE = 1296b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FIRST_FIXED_ARRAY_SUB_TYPE + LAST_FIXED_ARRAY_SUB_TYPE + 1, 1297b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch OBJECT_STATS_COUNT = FIRST_CODE_AGE_SUB_TYPE + Code::kCodeAgeCount + 1 1298b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 1299b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1300b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void RecordObjectStats(InstanceType type, size_t size) { 1301b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(type <= LAST_TYPE); 1302b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_counts_[type]++; 1303b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_sizes_[type] += size; 1304b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1305b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1306b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void RecordCodeSubTypeStats(int code_sub_type, int code_age, size_t size) { 1307b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int code_sub_type_index = FIRST_CODE_KIND_SUB_TYPE + code_sub_type; 1308b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int code_age_index = 1309b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FIRST_CODE_AGE_SUB_TYPE + code_age - Code::kFirstCodeAge; 1310b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(code_sub_type_index >= FIRST_CODE_KIND_SUB_TYPE && 1311b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch code_sub_type_index < FIRST_CODE_AGE_SUB_TYPE); 1312b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(code_age_index >= FIRST_CODE_AGE_SUB_TYPE && 1313b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch code_age_index < OBJECT_STATS_COUNT); 1314b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_counts_[code_sub_type_index]++; 1315b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_sizes_[code_sub_type_index] += size; 1316b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_counts_[code_age_index]++; 1317b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_sizes_[code_age_index] += size; 1318b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1319b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1320b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void RecordFixedArraySubTypeStats(int array_sub_type, size_t size) { 1321b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(array_sub_type <= LAST_FIXED_ARRAY_SUB_TYPE); 1322b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_counts_[FIRST_FIXED_ARRAY_SUB_TYPE + array_sub_type]++; 1323b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_sizes_[FIRST_FIXED_ARRAY_SUB_TYPE + array_sub_type] += size; 1324b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1325b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1326b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CheckpointObjectStats(); 1327b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1328b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // We don't use a LockGuard here since we want to lock the heap 1329b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // only when FLAG_concurrent_recompilation is true. 1330b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch class RelocationLock { 1331b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 1332b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit RelocationLock(Heap* heap) : heap_(heap) { 1333b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch heap_->relocation_mutex_.Lock(); 1334b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1335b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1336b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1337b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ~RelocationLock() { heap_->relocation_mutex_.Unlock(); } 1338b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1339b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 1340b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap_; 1341b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 1342b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1343b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void AddWeakObjectToCodeDependency(Handle<Object> obj, 1344b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Handle<DependentCode> dep); 1345b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1346b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DependentCode* LookupWeakObjectToCodeDependency(Handle<Object> obj); 1347b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1348b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void InitializeWeakObjectToCodeTable() { 1349b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch set_weak_object_to_code_table(undefined_value()); 1350b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1351b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1352b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void EnsureWeakObjectToCodeTable(); 1353b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1354b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static void FatalProcessOutOfMemory(const char* location, 1355b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool take_snapshot = false); 1356b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1357b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // This event is triggered after successful allocation of a new object made 1358b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // by runtime. Allocations of target space for object evacuation do not 1359b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // trigger the event. In order to track ALL allocations one must turn off 1360b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // FLAG_inline_new and FLAG_use_allocation_folding. 1361b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void OnAllocationEvent(HeapObject* object, int size_in_bytes); 1362b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1363b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // This event is triggered after object is moved to a new place. 1364b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void OnMoveEvent(HeapObject* target, HeapObject* source, 1365b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int size_in_bytes); 1366b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1367b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch protected: 1368b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Methods made available to tests. 1369b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1370b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates a JS Map in the heap. 1371b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1372b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateMap(InstanceType instance_type, int instance_size, 1373b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND); 1374b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1375b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates and initializes a new JavaScript object based on a 1376b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // constructor. 1377b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // If allocation_site is non-null, then a memento is emitted after the object 1378b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // that points to the site. 1379b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1380b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateJSObject(JSFunction* constructor, 1381b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PretenureFlag pretenure = NOT_TENURED, 1382b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocationSite* allocation_site = NULL); 1383b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1384b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates and initializes a new JavaScript object based on a map. 1385b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Passing an allocation site means that a memento will be created that 1386b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // points to the site. 1387b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1388b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateJSObjectFromMap(Map* map, PretenureFlag pretenure = NOT_TENURED, 1389b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool alloc_props = true, 1390b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocationSite* allocation_site = NULL); 1391b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1392b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocated a HeapNumber from value. 1393b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1394b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateHeapNumber(double value, MutableMode mode = IMMUTABLE, 1395b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PretenureFlag pretenure = NOT_TENURED); 1396b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1397b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate a byte array of the specified length 1398b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1399b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateByteArray(int length, PretenureFlag pretenure = NOT_TENURED); 1400b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1401b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Copy the code and scope info part of the code object, but insert 1402b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // the provided data as the relocation information. 1403b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1404b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch CopyCode(Code* code, Vector<byte> reloc_info); 1405b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1406b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult CopyCode(Code* code); 1407b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1408b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates a fixed array initialized with undefined values 1409b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1410b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateFixedArray(int length, PretenureFlag pretenure = NOT_TENURED); 1411b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1412b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 1413b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap(); 1414b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1415b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The amount of external memory registered through the API kept alive 1416b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // by global handles 1417b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int64_t amount_of_external_allocated_memory_; 1418b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1419b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Caches the amount of external memory registered at the last global gc. 1420b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int64_t amount_of_external_allocated_memory_at_last_global_gc_; 1421b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1422b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // This can be calculated directly from a pointer to the heap; however, it is 1423b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // more expedient to get at the isolate directly from within Heap methods. 1424b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Isolate* isolate_; 1425b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1426b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* roots_[kRootListLength]; 1427b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1428b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch size_t code_range_size_; 1429b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int reserved_semispace_size_; 1430b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int max_semi_space_size_; 1431b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int initial_semispace_size_; 1432b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t max_old_generation_size_; 1433b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t max_executable_size_; 1434b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t maximum_committed_; 1435b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1436b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // For keeping track of how much data has survived 1437b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // scavenge since last new space expansion. 1438b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int survived_since_last_expansion_; 1439b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1440b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // For keeping track on when to flush RegExp code. 1441b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int sweep_generation_; 1442b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1443b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int always_allocate_scope_depth_; 1444b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1445b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // For keeping track of context disposals. 1446b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int contexts_disposed_; 1447b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1448b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int global_ic_age_; 1449b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1450b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool flush_monomorphic_ics_; 1451b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1452b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int scan_on_scavenge_pages_; 1453b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1454b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NewSpace new_space_; 1455b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch OldSpace* old_pointer_space_; 1456b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch OldSpace* old_data_space_; 1457b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch OldSpace* code_space_; 1458b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MapSpace* map_space_; 1459b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch CellSpace* cell_space_; 1460b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PropertyCellSpace* property_cell_space_; 1461b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch LargeObjectSpace* lo_space_; 1462b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapState gc_state_; 1463b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int gc_post_processing_depth_; 1464b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address new_space_top_after_last_gc_; 1465b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1466b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns the amount of external memory registered since last global gc. 1467b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int64_t PromotedExternalMemorySize(); 1468b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1469b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // How many "runtime allocations" happened. 1470b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uint32_t allocations_count_; 1471b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1472b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Running hash over allocations performed. 1473b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uint32_t raw_allocations_hash_; 1474b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1475b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Countdown counter, dumps allocation hash when 0. 1476b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uint32_t dump_allocations_hash_countdown_; 1477b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1478b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // How many mark-sweep collections happened. 1479b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch unsigned int ms_count_; 1480b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1481b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // How many gc happened. 1482b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch unsigned int gc_count_; 1483b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1484b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // For post mortem debugging. 1485b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kRememberedUnmappedPages = 128; 1486b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int remembered_unmapped_pages_index_; 1487b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address remembered_unmapped_pages_[kRememberedUnmappedPages]; 1488b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1489b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Total length of the strings we failed to flatten since the last GC. 1490b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int unflattened_strings_length_; 1491b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1492b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#define ROOT_ACCESSOR(type, name, camel_name) \ 1493b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void set_##name(type* value) { \ 1494b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch /* The deserializer makes use of the fact that these common roots are */ \ 1495b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch /* never in new space and never on a page that is being compacted. */ \ 1496b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(k##camel_name##RootIndex >= kOldSpaceRoots || !InNewSpace(value)); \ 1497b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch roots_[k##camel_name##RootIndex] = value; \ 1498b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1499b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ROOT_LIST(ROOT_ACCESSOR) 1500b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#undef ROOT_ACCESSOR 1501b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1502b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef DEBUG 1503b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // If the --gc-interval flag is set to a positive value, this 1504b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // variable holds the value indicating the number of allocations 1505b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // remain until the next failure and garbage collection. 1506b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int allocation_timeout_; 1507b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif // DEBUG 1508b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1509b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Limit that triggers a global GC on the next (normally caused) GC. This 1510b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // is checked when we have already decided to do a GC to help determine 1511b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // which collector to invoke, before expanding a paged space in the old 1512b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // generation and on every allocation in large object space. 1513b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t old_generation_allocation_limit_; 1514b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1515b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Indicates that an allocation has failed in the old generation since the 1516b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // last GC. 1517b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool old_gen_exhausted_; 1518b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1519b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Indicates that inline bump-pointer allocation has been globally disabled 1520b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // for all spaces. This is used to disable allocations in generated code. 1521b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool inline_allocation_disabled_; 1522b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1523b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Weak list heads, threaded through the objects. 1524b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // List heads are initilized lazily and contain the undefined_value at start. 1525b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* native_contexts_list_; 1526b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* array_buffers_list_; 1527b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* allocation_sites_list_; 1528b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1529b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // WeakHashTable that maps objects embedded in optimized code to dependent 1530b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // code list. It is initilized lazily and contains the undefined_value at 1531b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // start. 1532b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* weak_object_to_code_table_; 1533b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1534b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // List of encountered weak collections (JSWeakMap and JSWeakSet) during 1535b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // marking. It is initialized during marking, destroyed after marking and 1536b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // contains Smi(0) while marking is not active. 1537b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* encountered_weak_collections_; 1538b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1539b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch StoreBufferRebuilder store_buffer_rebuilder_; 1540b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1541b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch struct StringTypeTable { 1542b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch InstanceType type; 1543b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int size; 1544b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RootListIndex index; 1545b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 1546b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1547b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch struct ConstantStringTable { 1548b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const char* contents; 1549b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RootListIndex index; 1550b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 1551b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1552b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch struct StructTable { 1553b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch InstanceType type; 1554b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int size; 1555b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch RootListIndex index; 1556b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 1557b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1558b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const StringTypeTable string_type_table[]; 1559b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const ConstantStringTable constant_string_table[]; 1560b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const StructTable struct_table[]; 1561b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1562b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // The special hidden string which is an empty string, but does not match 1563b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // any string when looked up in properties. 1564b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch String* hidden_string_; 1565b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1566b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // GC callback function, called before and after mark-compact GC. 1567b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocations in the callback function are disallowed. 1568b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch struct GCPrologueCallbackPair { 1569b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCPrologueCallbackPair(v8::Isolate::GCPrologueCallback callback, 1570b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCType gc_type, bool pass_isolate) 1571b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch : callback(callback), gc_type(gc_type), pass_isolate_(pass_isolate) {} 1572b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool operator==(const GCPrologueCallbackPair& pair) const { 1573b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return pair.callback == callback; 1574b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1575b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch v8::Isolate::GCPrologueCallback callback; 1576b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCType gc_type; 1577b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // TODO(dcarney): remove variable 1578b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool pass_isolate_; 1579b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 1580b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch List<GCPrologueCallbackPair> gc_prologue_callbacks_; 1581b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1582b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch struct GCEpilogueCallbackPair { 1583b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCEpilogueCallbackPair(v8::Isolate::GCPrologueCallback callback, 1584b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCType gc_type, bool pass_isolate) 1585b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch : callback(callback), gc_type(gc_type), pass_isolate_(pass_isolate) {} 1586b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool operator==(const GCEpilogueCallbackPair& pair) const { 1587b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return pair.callback == callback; 1588b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1589b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch v8::Isolate::GCPrologueCallback callback; 1590b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCType gc_type; 1591b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // TODO(dcarney): remove variable 1592b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool pass_isolate_; 1593b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 1594b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch List<GCEpilogueCallbackPair> gc_epilogue_callbacks_; 1595b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1596b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Support for computing object sizes during GC. 1597b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObjectCallback gc_safe_size_of_old_object_; 1598b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static int GcSafeSizeOfOldObject(HeapObject* object); 1599b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1600b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Update the GC state. Called from the mark-compact collector. 1601b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void MarkMapPointersAsEncoded(bool encoded) { 1602b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!encoded); 1603b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch gc_safe_size_of_old_object_ = &GcSafeSizeOfOldObject; 1604b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1605b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1606b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Code that should be run before and after each GC. Includes some 1607b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // reporting/verification activities when compiled with DEBUG set. 1608b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void GarbageCollectionPrologue(); 1609b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void GarbageCollectionEpilogue(); 1610b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1611b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Pretenuring decisions are made based on feedback collected during new 1612b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // space evacuation. Note that between feedback collection and calling this 1613b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // method object in old space must not move. 1614b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Right now we only process pretenuring feedback in high promotion mode. 1615b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ProcessPretenuringFeedback(); 1616b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1617b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Checks whether a global GC is necessary 1618b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GarbageCollector SelectGarbageCollector(AllocationSpace space, 1619b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const char** reason); 1620b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1621b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Make sure there is a filler value behind the top of the new space 1622b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // so that the GC does not confuse some unintialized/stale memory 1623b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // with the allocation memento of the object at the top 1624b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void EnsureFillerObjectAtTop(); 1625b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1626b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Ensure that we have swept all spaces in such a way that we can iterate 1627b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // over all objects. May cause a GC. 1628b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void MakeHeapIterable(); 1629b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1630b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Performs garbage collection operation. 1631b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns whether there is a chance that another major GC could 1632b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // collect more garbage. 1633b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool CollectGarbage( 1634b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GarbageCollector collector, const char* gc_reason, 1635b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const char* collector_reason, 1636b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const GCCallbackFlags gc_callback_flags = kNoGCCallbackFlags); 1637b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1638b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Performs garbage collection 1639b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Returns whether there is a chance another major GC could 1640b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // collect more garbage. 1641b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool PerformGarbageCollection( 1642b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GarbageCollector collector, 1643b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const GCCallbackFlags gc_callback_flags = kNoGCCallbackFlags); 1644b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1645b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void UpdateOldSpaceLimits(); 1646b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1647b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Selects the proper allocation space depending on the given object 1648b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // size, pretenuring decision, and preferred old-space. 1649b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static AllocationSpace SelectSpace(int object_size, 1650b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocationSpace preferred_old_space, 1651b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PretenureFlag pretenure) { 1652b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(preferred_old_space == OLD_POINTER_SPACE || 1653b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch preferred_old_space == OLD_DATA_SPACE); 1654b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (object_size > Page::kMaxRegularHeapObjectSize) return LO_SPACE; 1655b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return (pretenure == TENURED) ? preferred_old_space : NEW_SPACE; 1656b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1657b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1658b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate an uninitialized object. The memory is non-executable if the 1659b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // hardware and OS allow. This is the single choke-point for allocations 1660b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // performed by the runtime and should not be bypassed (to extend this to 1661b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // inlined allocations, use the Heap::DisableInlineAllocation() support). 1662b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT inline AllocationResult AllocateRaw( 1663b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int size_in_bytes, AllocationSpace space, AllocationSpace retry_space); 1664b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1665b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates a heap object based on the map. 1666b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1667b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Allocate(Map* map, AllocationSpace space, 1668b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocationSite* allocation_site = NULL); 1669b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1670b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates a partial map for bootstrapping. 1671b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1672b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocatePartialMap(InstanceType instance_type, int instance_size); 1673b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1674b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Initializes a JSObject based on its map. 1675b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void InitializeJSObjectFromMap(JSObject* obj, FixedArray* properties, 1676b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Map* map); 1677b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void InitializeAllocationMemento(AllocationMemento* memento, 1678b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocationSite* allocation_site); 1679b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1680b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate a block of memory in the given space (filled with a filler). 1681b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Used as a fall-back for generated code when the space is full. 1682b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1683b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateFillerObject(int size, bool double_align, AllocationSpace space); 1684b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1685b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate an uninitialized fixed array. 1686b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1687b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateRawFixedArray(int length, PretenureFlag pretenure); 1688b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1689b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate an uninitialized fixed double array. 1690b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1691b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateRawFixedDoubleArray(int length, PretenureFlag pretenure); 1692b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1693b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate an initialized fixed array with the given filler value. 1694b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1695b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateFixedArrayWithFiller(int length, PretenureFlag pretenure, 1696b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* filler); 1697b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1698b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate and partially initializes a String. There are two String 1699b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // encodings: one-byte and two-byte. These functions allocate a string of 1700b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // the given length and set its map and length fields. The characters of 1701b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // the string are uninitialized. 1702b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1703b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateRawOneByteString(int length, PretenureFlag pretenure); 1704b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1705b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateRawTwoByteString(int length, PretenureFlag pretenure); 1706b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1707b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool CreateInitialMaps(); 1708b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CreateInitialObjects(); 1709b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1710b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates an internalized string in old space based on the character 1711b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // stream. 1712b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT inline AllocationResult AllocateInternalizedStringFromUtf8( 1713b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Vector<const char> str, int chars, uint32_t hash_field); 1714b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1715b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT inline AllocationResult AllocateOneByteInternalizedString( 1716b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Vector<const uint8_t> str, uint32_t hash_field); 1717b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1718b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT inline AllocationResult AllocateTwoByteInternalizedString( 1719b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Vector<const uc16> str, uint32_t hash_field); 1720b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1721b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch template <bool is_one_byte, typename T> 1722b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1723b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateInternalizedStringImpl(T t, int chars, uint32_t hash_field); 1724b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1725b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch template <typename T> 1726b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT inline AllocationResult AllocateInternalizedStringImpl( 1727b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch T t, int chars, uint32_t hash_field); 1728b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1729b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates an uninitialized fixed array. It must be filled by the caller. 1730b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult AllocateUninitializedFixedArray(int length); 1731b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1732b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Make a copy of src and return it. Returns 1733b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Failure::RetryAfterGC(requested_bytes, space) if the allocation failed. 1734b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT inline AllocationResult CopyFixedArray(FixedArray* src); 1735b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1736b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Make a copy of src, set the map, and return the copy. Returns 1737b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Failure::RetryAfterGC(requested_bytes, space) if the allocation failed. 1738b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1739b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch CopyFixedArrayWithMap(FixedArray* src, Map* map); 1740b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1741b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Make a copy of src and return it. Returns 1742b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Failure::RetryAfterGC(requested_bytes, space) if the allocation failed. 1743b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT inline AllocationResult CopyFixedDoubleArray( 1744b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FixedDoubleArray* src); 1745b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1746b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Make a copy of src and return it. Returns 1747b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Failure::RetryAfterGC(requested_bytes, space) if the allocation failed. 1748b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT inline AllocationResult CopyConstantPoolArray( 1749b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ConstantPoolArray* src); 1750b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1751b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1752b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Computes a single character string where the character has code. 1753b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // A cache is used for one-byte (Latin1) codes. 1754b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1755b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch LookupSingleCharacterStringFromCode(uint16_t code); 1756b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1757b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate a symbol in old space. 1758b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult AllocateSymbol(); 1759b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1760b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Make a copy of src, set the map, and return the copy. 1761b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1762b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch CopyConstantPoolArrayWithMap(ConstantPoolArray* src, Map* map); 1763b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1764b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult AllocateConstantPoolArray( 1765b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const ConstantPoolArray::NumberOfEntries& small); 1766b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1767b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult AllocateExtendedConstantPoolArray( 1768b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const ConstantPoolArray::NumberOfEntries& small, 1769b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch const ConstantPoolArray::NumberOfEntries& extended); 1770b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1771b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates an external array of the specified length and type. 1772b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1773b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateExternalArray(int length, ExternalArrayType array_type, 1774b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void* external_pointer, PretenureFlag pretenure); 1775b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1776b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates a fixed typed array of the specified length and type. 1777b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1778b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateFixedTypedArray(int length, ExternalArrayType array_type, 1779b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PretenureFlag pretenure); 1780b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1781b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Make a copy of src and return it. 1782b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult CopyAndTenureFixedCOWArray(FixedArray* src); 1783b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1784b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Make a copy of src, set the map, and return the copy. 1785b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1786b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch CopyFixedDoubleArrayWithMap(FixedDoubleArray* src, Map* map); 1787b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1788b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates a fixed double array with uninitialized values. Returns 1789b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult AllocateUninitializedFixedDoubleArray( 1790b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int length, PretenureFlag pretenure = NOT_TENURED); 1791b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1792b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // These five Create*EntryStub functions are here and forced to not be inlined 1793b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // because of a gcc-4.4 bug that assigns wrong vtable entries. 1794b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NO_INLINE(void CreateJSEntryStub()); 1795b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch NO_INLINE(void CreateJSConstructEntryStub()); 1796b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1797b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void CreateFixedStubs(); 1798b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1799b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate empty fixed array. 1800b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult AllocateEmptyFixedArray(); 1801b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1802b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate empty external array of given type. 1803b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1804b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateEmptyExternalArray(ExternalArrayType array_type); 1805b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1806b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate empty fixed typed array of given type. 1807b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1808b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateEmptyFixedTypedArray(ExternalArrayType array_type); 1809b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1810b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate empty constant pool array. 1811b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult AllocateEmptyConstantPoolArray(); 1812b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1813b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate a tenured simple cell. 1814b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult AllocateCell(Object* value); 1815b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1816b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocate a tenured JS global property cell initialized with the hole. 1817b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult AllocatePropertyCell(); 1818b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1819b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates a new utility object in the old generation. 1820b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult AllocateStruct(InstanceType type); 1821b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1822b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Allocates a new foreign object. 1823b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1824b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateForeign(Address address, PretenureFlag pretenure = NOT_TENURED); 1825b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1826b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult 1827b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch AllocateCode(int object_size, bool immovable); 1828b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1829b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult InternalizeStringWithKey(HashTableKey* key); 1830b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1831b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MUST_USE_RESULT AllocationResult InternalizeString(String* str); 1832b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1833b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Performs a minor collection in new generation. 1834b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Scavenge(); 1835b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1836b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Commits from space if it is uncommitted. 1837b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void EnsureFromSpaceIsCommitted(); 1838b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1839b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Uncommit unused semi space. 1840b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool UncommitFromSpace() { return new_space_.UncommitFromSpace(); } 1841b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1842b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Fill in bogus values in from space 1843b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ZapFromSpace(); 1844b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1845b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static String* UpdateNewSpaceReferenceInExternalStringTableEntry( 1846b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap, Object** pointer); 1847b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1848b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address DoScavenge(ObjectVisitor* scavenge_visitor, Address new_space_front); 1849b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static void ScavengeStoreBufferCallback(Heap* heap, MemoryChunk* page, 1850b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch StoreBufferEvent event); 1851b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1852b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Performs a major collection in the whole heap. 1853b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void MarkCompact(); 1854b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1855b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Code to be run before and after mark-compact. 1856b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void MarkCompactPrologue(); 1857b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1858b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ProcessNativeContexts(WeakObjectRetainer* retainer); 1859b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ProcessArrayBuffers(WeakObjectRetainer* retainer); 1860b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ProcessAllocationSites(WeakObjectRetainer* retainer); 1861b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1862b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Deopts all code that contains allocation instruction which are tenured or 1863b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // not tenured. Moreover it clears the pretenuring allocation site statistics. 1864b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ResetAllAllocationSitesDependentCode(PretenureFlag flag); 1865b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1866b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Evaluates local pretenuring for the old space and calls 1867b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // ResetAllTenuredAllocationSitesDependentCode if too many objects died in 1868b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // the old space. 1869b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void EvaluateOldSpaceLocalPretenuring(uint64_t size_of_objects_before_gc); 1870b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1871b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Called on heap tear-down. 1872b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void TearDownArrayBuffers(); 1873b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1874b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Record statistics before and after garbage collection. 1875b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ReportStatisticsBeforeGC(); 1876b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ReportStatisticsAfterGC(); 1877b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1878b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Slow part of scavenge object. 1879b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static void ScavengeObjectSlow(HeapObject** p, HeapObject* object); 1880b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1881b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Total RegExp code ever generated 1882b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double total_regexp_code_generated_; 1883b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1884b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCTracer tracer_; 1885b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1886b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Creates and installs the full-sized number string cache. 1887b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int FullSizeNumberStringCacheLength(); 1888b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Flush the number to string cache. 1889b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void FlushNumberStringCache(); 1890b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1891b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Sets used allocation sites entries to undefined. 1892b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void FlushAllocationSitesScratchpad(); 1893b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1894b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Initializes the allocation sites scratchpad with undefined values. 1895b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void InitializeAllocationSitesScratchpad(); 1896b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1897b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Adds an allocation site to the scratchpad if there is space left. 1898b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void AddAllocationSiteToScratchpad(AllocationSite* site, 1899b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ScratchpadSlotMode mode); 1900b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1901b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void UpdateSurvivalStatistics(int start_new_space_size); 1902b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1903b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kYoungSurvivalRateHighThreshold = 90; 1904b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kYoungSurvivalRateAllowedDeviation = 15; 1905b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1906b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kOldSurvivalRateLowThreshold = 10; 1907b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1908b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int high_survival_rate_period_length_; 1909b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t promoted_objects_size_; 1910b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double promotion_rate_; 1911b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t semi_space_copied_object_size_; 1912b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double semi_space_copied_rate_; 1913b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int nodes_died_in_new_space_; 1914b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int nodes_copied_in_new_space_; 1915b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int nodes_promoted_; 1916b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1917b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // This is the pretenuring trigger for allocation sites that are in maybe 1918b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // tenure state. When we switched to the maximum new space size we deoptimize 1919b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // the code that belongs to the allocation site and derive the lifetime 1920b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // of the allocation site. 1921b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch unsigned int maximum_size_scavenges_; 1922b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1923b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // TODO(hpayer): Allocation site pretenuring may make this method obsolete. 1924b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Re-visit incremental marking heuristics. 1925b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool IsHighSurvivalRate() { return high_survival_rate_period_length_ > 0; } 1926b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1927b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void SelectScavengingVisitorsTable(); 1928b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1929b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void IdleMarkCompact(const char* message); 1930b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1931b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void AdvanceIdleIncrementalMarking(intptr_t step_size); 1932b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1933b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool WorthActivatingIncrementalMarking(); 1934b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1935b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void ClearObjectStats(bool clear_last_time_stats = false); 1936b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1937b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void set_weak_object_to_code_table(Object* value) { 1938b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!InNewSpace(value)); 1939b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch weak_object_to_code_table_ = value; 1940b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1941b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1942b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object** weak_object_to_code_table_address() { 1943b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return &weak_object_to_code_table_; 1944b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 1945b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1946b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void UpdateAllocationsHash(HeapObject* object); 1947b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void UpdateAllocationsHash(uint32_t value); 1948b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void PrintAlloctionsHash(); 1949b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1950b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kInitialStringTableSize = 2048; 1951b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kInitialEvalCacheSize = 64; 1952b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kInitialNumberStringCacheSize = 256; 1953b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1954b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Object counts and used memory by InstanceType 1955b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch size_t object_counts_[OBJECT_STATS_COUNT]; 1956b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch size_t object_counts_last_time_[OBJECT_STATS_COUNT]; 1957b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch size_t object_sizes_[OBJECT_STATS_COUNT]; 1958b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch size_t object_sizes_last_time_[OBJECT_STATS_COUNT]; 1959b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1960b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Maximum GC pause. 1961b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double max_gc_pause_; 1962b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1963b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Total time spent in GC. 1964b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double total_gc_time_ms_; 1965b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1966b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Maximum size of objects alive after GC. 1967b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t max_alive_after_gc_; 1968b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1969b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Minimal interval between two subsequent collections. 1970b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double min_in_mutator_; 1971b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1972b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Cumulative GC time spent in marking 1973b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double marking_time_; 1974b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1975b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Cumulative GC time spent in sweeping 1976b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch double sweeping_time_; 1977b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1978b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MarkCompactCollector mark_compact_collector_; 1979b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1980b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch StoreBuffer store_buffer_; 1981b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1982b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Marking marking_; 1983b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1984b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch IncrementalMarking incremental_marking_; 1985b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1986b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch GCIdleTimeHandler gc_idle_time_handler_; 1987b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch unsigned int gc_count_at_last_idle_gc_; 1988b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1989b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // These two counters are monotomically increasing and never reset. 1990b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch size_t full_codegen_bytes_generated_; 1991b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch size_t crankshaft_codegen_bytes_generated_; 1992b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1993b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // If the --deopt_every_n_garbage_collections flag is set to a positive value, 1994b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // this variable holds the number of garbage collections since the last 1995b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // deoptimization triggered by garbage collection. 1996b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int gcs_since_last_deopt_; 1997b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 1998b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef VERIFY_HEAP 1999b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int no_weak_object_verification_scope_depth_; 2000b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif 2001b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2002b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kAllocationSiteScratchpadSize = 256; 2003b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int allocation_sites_scratchpad_length_; 2004b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2005b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMaxMarkCompactsInIdleRound = 7; 2006b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kIdleScavengeThreshold = 5; 2007b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2008b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Shared state read by the scavenge collector and set by ScavengeObject. 2009b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PromotionQueue promotion_queue_; 2010b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2011b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Flag is set when the heap has been configured. The heap can be repeatedly 2012b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // configured through the API until it is set up. 2013b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool configured_; 2014b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2015b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ExternalStringTable external_string_table_; 2016b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2017b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch VisitorDispatchTable<ScavengingCallback> scavenging_visitors_table_; 2018b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2019b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MemoryChunk* chunks_queued_for_free_; 2020b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2021b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch base::Mutex relocation_mutex_; 2022b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2023b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int gc_callbacks_depth_; 2024b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2025b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class AlwaysAllocateScope; 2026b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class Factory; 2027b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class GCCallbacksScope; 2028b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class GCTracer; 2029b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class HeapIterator; 2030b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class Isolate; 2031b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class MarkCompactCollector; 2032b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class MarkCompactMarkingVisitor; 2033b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class MapCompact; 2034b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef VERIFY_HEAP 2035b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class NoWeakObjectVerificationScope; 2036b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif 2037b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class Page; 2038b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2039b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DISALLOW_COPY_AND_ASSIGN(Heap); 2040b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2041b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2042b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2043b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass HeapStats { 2044b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2045b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kStartMarker = 0xDECADE00; 2046b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kEndMarker = 0xDECADE01; 2047b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2048b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* start_marker; // 0 2049b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* new_space_size; // 1 2050b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* new_space_capacity; // 2 2051b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* old_pointer_space_size; // 3 2052b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* old_pointer_space_capacity; // 4 2053b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* old_data_space_size; // 5 2054b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* old_data_space_capacity; // 6 2055b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* code_space_size; // 7 2056b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* code_space_capacity; // 8 2057b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* map_space_size; // 9 2058b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* map_space_capacity; // 10 2059b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* cell_space_size; // 11 2060b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* cell_space_capacity; // 12 2061b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* lo_space_size; // 13 2062b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* global_handle_count; // 14 2063b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* weak_global_handle_count; // 15 2064b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* pending_global_handle_count; // 16 2065b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* near_death_global_handle_count; // 17 2066b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* free_global_handle_count; // 18 2067b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* memory_allocator_size; // 19 2068b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* memory_allocator_capacity; // 20 2069b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* objects_per_type; // 21 2070b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* size_per_type; // 22 2071b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* os_error; // 23 2072b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int* end_marker; // 24 2073b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* property_cell_space_size; // 25 2074b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch intptr_t* property_cell_space_capacity; // 26 2075b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2076b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2077b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2078b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass AlwaysAllocateScope { 2079b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2080b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit inline AlwaysAllocateScope(Isolate* isolate); 2081b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline ~AlwaysAllocateScope(); 2082b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2083b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2084b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Implicitly disable artificial allocation failures. 2085b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap_; 2086b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DisallowAllocationFailure daf_; 2087b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2088b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2089b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2090b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef VERIFY_HEAP 2091b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass NoWeakObjectVerificationScope { 2092b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2093b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline NoWeakObjectVerificationScope(); 2094b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline ~NoWeakObjectVerificationScope(); 2095b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2096b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif 2097b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2098b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2099b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass GCCallbacksScope { 2100b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2101b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit inline GCCallbacksScope(Heap* heap); 2102b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline ~GCCallbacksScope(); 2103b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2104b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline bool CheckReenter(); 2105b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2106b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2107b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap_; 2108b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2109b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2110b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2111b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Visitor class to verify interior pointers in spaces that do not contain 2112b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// or care about intergenerational references. All heap object pointers have to 2113b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// point into the heap to a location that has a map pointer at its first word. 2114b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Caveat: Heap::Contains is an approximation because it can return true for 2115b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// objects in a heap space but above the allocation pointer. 2116b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass VerifyPointersVisitor : public ObjectVisitor { 2117b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2118b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void VisitPointers(Object** start, Object** end); 2119b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2120b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2121b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2122b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Verify that all objects are Smis. 2123b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass VerifySmisVisitor : public ObjectVisitor { 2124b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2125b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch inline void VisitPointers(Object** start, Object** end); 2126b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2127b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2128b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2129b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Space iterator for iterating over all spaces of the heap. Returns each space 2130b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// in turn, and null when it is done. 2131b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass AllSpaces BASE_EMBEDDED { 2132b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2133b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit AllSpaces(Heap* heap) : heap_(heap), counter_(FIRST_SPACE) {} 2134b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Space* next(); 2135b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2136b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2137b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap_; 2138b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int counter_; 2139b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2140b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2141b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2142b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Space iterator for iterating over all old spaces of the heap: Old pointer 2143b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// space, old data space and code space. Returns each space in turn, and null 2144b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// when it is done. 2145b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass OldSpaces BASE_EMBEDDED { 2146b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2147b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit OldSpaces(Heap* heap) : heap_(heap), counter_(OLD_POINTER_SPACE) {} 2148b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch OldSpace* next(); 2149b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2150b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2151b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap_; 2152b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int counter_; 2153b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2154b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2155b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2156b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Space iterator for iterating over all the paged spaces of the heap: Map 2157b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// space, old pointer space, old data space, code space and cell space. Returns 2158b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// each space in turn, and null when it is done. 2159b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass PagedSpaces BASE_EMBEDDED { 2160b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2161b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit PagedSpaces(Heap* heap) : heap_(heap), counter_(OLD_POINTER_SPACE) {} 2162b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PagedSpace* next(); 2163b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2164b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2165b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap_; 2166b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int counter_; 2167b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2168b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2169b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2170b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Space iterator for iterating over all spaces of the heap. 2171b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// For each space an object iterator is provided. The deallocation of the 2172b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// returned object iterators is handled by the space iterator. 2173b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass SpaceIterator : public Malloced { 2174b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2175b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit SpaceIterator(Heap* heap); 2176b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch SpaceIterator(Heap* heap, HeapObjectCallback size_func); 2177b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch virtual ~SpaceIterator(); 2178b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2179b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool has_next(); 2180b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectIterator* next(); 2181b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2182b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2183b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectIterator* CreateIterator(); 2184b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2185b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap_; 2186b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int current_space_; // from enum AllocationSpace. 2187b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectIterator* iterator_; // object iterator for the current space. 2188b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObjectCallback size_func_; 2189b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2190b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2191b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2192b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// A HeapIterator provides iteration over the whole heap. It 2193b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// aggregates the specific iterators for the different spaces as 2194b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// these can only iterate over one space only. 2195b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// 2196b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// HeapIterator ensures there is no allocation during its lifetime 2197b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// (using an embedded DisallowHeapAllocation instance). 2198b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// 2199b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// HeapIterator can skip free list nodes (that is, de-allocated heap 2200b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// objects that still remain in the heap). As implementation of free 2201b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// nodes filtering uses GC marks, it can't be used during MS/MC GC 2202b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// phases. Also, it is forbidden to interrupt iteration in this mode, 2203b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// as this will leave heap objects marked (and thus, unusable). 2204b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass HeapObjectsFilter; 2205b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2206b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass HeapIterator BASE_EMBEDDED { 2207b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2208b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch enum HeapObjectsFiltering { kNoFiltering, kFilterUnreachable }; 2209b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2210b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit HeapIterator(Heap* heap); 2211b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapIterator(Heap* heap, HeapObjectsFiltering filtering); 2212b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ~HeapIterator(); 2213b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2214b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObject* next(); 2215b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void reset(); 2216b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2217b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2218b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch struct MakeHeapIterableHelper { 2219b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch explicit MakeHeapIterableHelper(Heap* heap) { heap->MakeHeapIterable(); } 2220b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 2221b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2222b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Perform the initialization. 2223b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Init(); 2224b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Perform all necessary shutdown (destruction) work. 2225b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Shutdown(); 2226b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObject* NextObject(); 2227b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2228b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch MakeHeapIterableHelper make_heap_iterable_helper_; 2229b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DisallowHeapAllocation no_heap_allocation_; 2230b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Heap* heap_; 2231b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObjectsFiltering filtering_; 2232b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch HeapObjectsFilter* filter_; 2233b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Space iterator for iterating all the spaces. 2234b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch SpaceIterator* space_iterator_; 2235b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Object iterator for the space currently being iterated. 2236b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ObjectIterator* object_iterator_; 2237b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2238b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2239b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2240b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Cache for mapping (map, property name) into field offset. 2241b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Cleared at startup and prior to mark sweep collection. 2242b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass KeyedLookupCache { 2243b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2244b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Lookup field offset for (map, name). If absent, -1 is returned. 2245b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int Lookup(Handle<Map> map, Handle<Name> name); 2246b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2247b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Update an element in the cache. 2248b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Update(Handle<Map> map, Handle<Name> name, int field_offset); 2249b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2250b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Clear the cache. 2251b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Clear(); 2252b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2253b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kLength = 256; 2254b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kCapacityMask = kLength - 1; 2255b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMapHashShift = 5; 2256b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kHashMask = -4; // Zero the last two bits. 2257b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kEntriesPerBucket = 4; 2258b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kEntryLength = 2; 2259b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMapIndex = 0; 2260b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kKeyIndex = 1; 2261b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kNotFound = -1; 2262b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2263b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // kEntriesPerBucket should be a power of 2. 2264b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT((kEntriesPerBucket & (kEntriesPerBucket - 1)) == 0); 2265b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT(kEntriesPerBucket == -kHashMask); 2266b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2267b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2268b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch KeyedLookupCache() { 2269b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < kLength; ++i) { 2270b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch keys_[i].map = NULL; 2271b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch keys_[i].name = NULL; 2272b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch field_offsets_[i] = kNotFound; 2273b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2274b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2275b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2276b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static inline int Hash(Handle<Map> map, Handle<Name> name); 2277b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2278b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Get the address of the keys and field_offsets arrays. Used in 2279b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // generated code to perform cache lookups. 2280b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address keys_address() { return reinterpret_cast<Address>(&keys_); } 2281b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2282b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Address field_offsets_address() { 2283b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return reinterpret_cast<Address>(&field_offsets_); 2284b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2285b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2286b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch struct Key { 2287b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Map* map; 2288b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Name* name; 2289b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 2290b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2291b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Key keys_[kLength]; 2292b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int field_offsets_[kLength]; 2293b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2294b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class ExternalReference; 2295b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class Isolate; 2296b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DISALLOW_COPY_AND_ASSIGN(KeyedLookupCache); 2297b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2298b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2299b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2300b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Cache for mapping (map, property name) into descriptor index. 2301b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// The cache contains both positive and negative results. 2302b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Descriptor index equals kNotFound means the property is absent. 2303b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Cleared at startup and prior to any gc. 2304b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass DescriptorLookupCache { 2305b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2306b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Lookup descriptor index for (map, name). 2307b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // If absent, kAbsent is returned. 2308b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int Lookup(Map* source, Name* name) { 2309b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (!name->IsUniqueName()) return kAbsent; 2310b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int index = Hash(source, name); 2311b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Key& key = keys_[index]; 2312b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if ((key.source == source) && (key.name == name)) return results_[index]; 2313b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return kAbsent; 2314b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2315b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2316b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Update an element in the cache. 2317b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Update(Map* source, Name* name, int result) { 2318b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(result != kAbsent); 2319b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch if (name->IsUniqueName()) { 2320b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int index = Hash(source, name); 2321b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Key& key = keys_[index]; 2322b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch key.source = source; 2323b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch key.name = name; 2324b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch results_[index] = result; 2325b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2326b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2327b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2328b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Clear the cache. 2329b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Clear(); 2330b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2331b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kAbsent = -2; 2332b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2333b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2334b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DescriptorLookupCache() { 2335b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (int i = 0; i < kLength; ++i) { 2336b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch keys_[i].source = NULL; 2337b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch keys_[i].name = NULL; 2338b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch results_[i] = kAbsent; 2339b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2340b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2341b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2342b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static int Hash(Object* source, Name* name) { 2343b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Uses only lower 32 bits if pointers are larger. 2344b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uint32_t source_hash = 2345b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static_cast<uint32_t>(reinterpret_cast<uintptr_t>(source)) >> 2346b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch kPointerSizeLog2; 2347b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uint32_t name_hash = 2348b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static_cast<uint32_t>(reinterpret_cast<uintptr_t>(name)) >> 2349b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch kPointerSizeLog2; 2350b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return (source_hash ^ name_hash) % kLength; 2351b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2352b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2353b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kLength = 64; 2354b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch struct Key { 2355b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Map* source; 2356b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Name* name; 2357b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 2358b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2359b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Key keys_[kLength]; 2360b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch int results_[kLength]; 2361b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2362b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch friend class Isolate; 2363b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DISALLOW_COPY_AND_ASSIGN(DescriptorLookupCache); 2364b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2365b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2366b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2367b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass RegExpResultsCache { 2368b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2369b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch enum ResultsCacheType { REGEXP_MULTIPLE_INDICES, STRING_SPLIT_SUBSTRINGS }; 2370b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2371b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Attempt to retrieve a cached result. On failure, 0 is returned as a Smi. 2372b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // On success, the returned result is guaranteed to be a COW-array. 2373b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static Object* Lookup(Heap* heap, String* key_string, Object* key_pattern, 2374b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ResultsCacheType type); 2375b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Attempt to add value_array to the cache specified by type. On success, 2376b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // value_array is turned into a COW-array. 2377b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static void Enter(Isolate* isolate, Handle<String> key_string, 2378b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Handle<Object> key_pattern, Handle<FixedArray> value_array, 2379b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch ResultsCacheType type); 2380b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static void Clear(FixedArray* cache); 2381b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kRegExpResultsCacheSize = 0x100; 2382b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2383b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2384b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kArrayEntriesPerCacheEntry = 4; 2385b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kStringOffset = 0; 2386b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kPatternOffset = 1; 2387b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kArrayOffset = 2; 2388b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2389b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2390b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2391b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Abstract base class for checking whether a weak object should be retained. 2392b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass WeakObjectRetainer { 2393b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2394b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch virtual ~WeakObjectRetainer() {} 2395b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2396b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Return whether this object should be retained. If NULL is returned the 2397b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // object has no references. Otherwise the address of the retained object 2398b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // should be returned as in some GC situations the object has been moved. 2399b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch virtual Object* RetainAs(Object* object) = 0; 2400b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2401b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2402b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2403b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Intrusive object marking uses least significant bit of 2404b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// heap object's map word to mark objects. 2405b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Normally all map words have least significant bit set 2406b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// because they contain tagged map pointer. 2407b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// If the bit is not set object is marked. 2408b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// All objects should be unmarked before resuming 2409b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// JavaScript execution. 2410b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass IntrusiveMarking { 2411b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2412b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static bool IsMarked(HeapObject* object) { 2413b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return (object->map_word().ToRawValue() & kNotMarkedBit) == 0; 2414b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2415b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2416b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static void ClearMark(HeapObject* object) { 2417b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uintptr_t map_word = object->map_word().ToRawValue(); 2418b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object->set_map_word(MapWord::FromRawValue(map_word | kNotMarkedBit)); 2419b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(!IsMarked(object)); 2420b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2421b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2422b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static void SetMark(HeapObject* object) { 2423b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uintptr_t map_word = object->map_word().ToRawValue(); 2424b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object->set_map_word(MapWord::FromRawValue(map_word & ~kNotMarkedBit)); 2425b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DCHECK(IsMarked(object)); 2426b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2427b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2428b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static Map* MapOfMarkedObject(HeapObject* object) { 2429b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch uintptr_t map_word = object->map_word().ToRawValue(); 2430b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return MapWord::FromRawValue(map_word | kNotMarkedBit).ToMap(); 2431b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2432b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2433b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static int SizeOfMarkedObject(HeapObject* object) { 2434b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return object->SizeFromMap(MapOfMarkedObject(object)); 2435b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 2436b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2437b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2438b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const uintptr_t kNotMarkedBit = 0x1; 2439b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch STATIC_ASSERT((kHeapObjectTag & kNotMarkedBit) != 0); // NOLINT 2440b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2441b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2442b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2443b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#ifdef DEBUG 2444b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// Helper class for tracing paths to a search target Object from all roots. 2445b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// The TracePathFrom() method can be used to trace paths from a specific 2446b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch// object to the search target object. 2447b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochclass PathTracer : public ObjectVisitor { 2448b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch public: 2449b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch enum WhatToFind { 2450b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FIND_ALL, // Will find all matches. 2451b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch FIND_FIRST // Will stop the search after first match. 2452b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch }; 2453b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2454b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // Tags 0, 1, and 3 are used. Use 2 for marking visited HeapObject. 2455b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static const int kMarkTag = 2; 2456b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2457b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // For the WhatToFind arg, if FIND_FIRST is specified, tracing will stop 2458b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // after the first match. If FIND_ALL is specified, then tracing will be 2459b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch // done for all matches. 2460b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch PathTracer(Object* search_target, WhatToFind what_to_find, 2461b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch VisitMode visit_mode) 2462b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch : search_target_(search_target), 2463b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch found_target_(false), 2464b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch found_target_in_trace_(false), 2465b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch what_to_find_(what_to_find), 2466b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch visit_mode_(visit_mode), 2467b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch object_stack_(20), 2468b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch no_allocation() {} 2469b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2470b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch virtual void VisitPointers(Object** start, Object** end); 2471b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2472b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void Reset(); 2473b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void TracePathFrom(Object** root); 2474b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2475b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool found() const { return found_target_; } 2476b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2477b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch static Object* const kAnyGlobalObject; 2478b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2479b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch protected: 2480b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch class MarkVisitor; 2481b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch class UnmarkVisitor; 2482b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2483b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void MarkRecursively(Object** p, MarkVisitor* mark_visitor); 2484b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch void UnmarkRecursively(Object** p, UnmarkVisitor* unmark_visitor); 2485b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch virtual void ProcessResults(); 2486b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2487b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch Object* search_target_; 2488b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool found_target_; 2489b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch bool found_target_in_trace_; 2490b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch WhatToFind what_to_find_; 2491b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch VisitMode visit_mode_; 2492b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch List<Object*> object_stack_; 2493b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2494b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DisallowHeapAllocation no_allocation; // i.e. no gc allowed. 2495b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2496b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch private: 2497b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer); 2498b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch}; 2499b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif // DEBUG 2500b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 2501b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} // namespace v8::internal 2502b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 2503b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch#endif // V8_HEAP_HEAP_H_ 2504