// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_HEAP_FACTORY_H_
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#define V8_HEAP_FACTORY_H_
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// Clients of this interface shouldn't depend on lots of heap internals.
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// Do not include anything from src/heap here!
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#include "src/builtins/builtins.h"
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#include "src/globals.h"
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#include "src/handles.h"
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#include "src/heap/heap.h"
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#include "src/maybe-handles.h"
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#include "src/messages.h"
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#include "src/objects/code.h"
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#include "src/objects/dictionary.h"
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#include "src/objects/hash-table.h"
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#include "src/objects/js-array-buffer.h"
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#include "src/objects/js-array.h"
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#include "src/objects/js-regexp.h"
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#include "src/objects/ordered-hash-table.h"
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#include "src/objects/string.h"
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namespace v8 {
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namespace internal {
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// Forward declarations.
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class AliasedArgumentsEntry;
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class ObjectBoilerplateDescription;
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class BreakPoint;
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class BreakPointInfo;
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class CallableTask;
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class CallbackTask;
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class CallHandlerInfo;
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class Expression;
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class ArrayBoilerplateDescription;
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class CoverageInfo;
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class DebugInfo;
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class EnumCache;
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class FreshlyAllocatedBigInt;
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class Isolate;
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class JSGeneratorObject;
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class JSMap;
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class JSMapIterator;
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class JSModuleNamespace;
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class JSProxy;
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class JSSet;
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class JSSetIterator;
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class JSWeakMap;
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class LoadHandler;
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class ModuleInfo;
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class NativeContext;
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class NewFunctionArgs;
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class PreParsedScopeData;
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class PromiseResolveThenableJobTask;
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class RegExpMatchInfo;
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class ScriptContextTable;
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class StoreHandler;
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class TemplateObjectDescription;
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class UncompiledDataWithoutPreParsedScope;
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class UncompiledDataWithPreParsedScope;
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class WasmExportedFunctionData;
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struct SourceRange;
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template <typename T>
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class ZoneVector;
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enum FunctionMode {
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kWithNameBit = 1 << 0,
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kWithHomeObjectBit = 1 << 1,
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kWithWritablePrototypeBit = 1 << 2,
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kWithReadonlyPrototypeBit = 1 << 3,
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kWithPrototypeBits = kWithWritablePrototypeBit | kWithReadonlyPrototypeBit,
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// Without prototype.
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FUNCTION_WITHOUT_PROTOTYPE = 0,
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METHOD_WITH_NAME = kWithNameBit,
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METHOD_WITH_HOME_OBJECT = kWithHomeObjectBit,
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METHOD_WITH_NAME_AND_HOME_OBJECT = kWithNameBit | kWithHomeObjectBit,
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// With writable prototype.
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FUNCTION_WITH_WRITEABLE_PROTOTYPE = kWithWritablePrototypeBit,
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FUNCTION_WITH_NAME_AND_WRITEABLE_PROTOTYPE =
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kWithWritablePrototypeBit | kWithNameBit,
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FUNCTION_WITH_HOME_OBJECT_AND_WRITEABLE_PROTOTYPE =
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kWithWritablePrototypeBit | kWithHomeObjectBit,
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FUNCTION_WITH_NAME_AND_HOME_OBJECT_AND_WRITEABLE_PROTOTYPE =
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kWithWritablePrototypeBit | kWithNameBit | kWithHomeObjectBit,
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// With readonly prototype.
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FUNCTION_WITH_READONLY_PROTOTYPE = kWithReadonlyPrototypeBit,
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FUNCTION_WITH_NAME_AND_READONLY_PROTOTYPE =
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kWithReadonlyPrototypeBit | kWithNameBit,
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};
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// Interface for handle based allocation.
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class V8_EXPORT_PRIVATE Factory {
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public:
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Handle<Oddball> NewOddball(Handle<Map> map, const char* to_string,
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Handle<Object> to_number, const char* type_of,
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byte kind,
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PretenureFlag pretenure = TENURED_READ_ONLY);
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// Marks self references within code generation.
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Handle<Oddball> NewSelfReferenceMarker(PretenureFlag pretenure = TENURED);
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// Allocates a fixed array-like object with given map and initialized with
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// undefined values.
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template <typename T = FixedArray>
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Handle<T> NewFixedArrayWithMap(Heap::RootListIndex map_root_index, int length,
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PretenureFlag pretenure = NOT_TENURED);
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// Allocates a weak fixed array-like object with given map and initialized
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// with undefined values.
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template <typename T = WeakFixedArray>
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Handle<T> NewWeakFixedArrayWithMap(Heap::RootListIndex map_root_index,
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int length,
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PretenureFlag pretenure = NOT_TENURED);
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// Allocates a fixed array initialized with undefined values.
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Handle<FixedArray> NewFixedArray(int length,
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PretenureFlag pretenure = NOT_TENURED);
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// Allocates a fixed array which may contain in-place weak references. The
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// array is initialized with undefined values
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Handle<WeakFixedArray> NewWeakFixedArray(
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int length, PretenureFlag pretenure = NOT_TENURED);
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// Allocates a property array initialized with undefined values.
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Handle<PropertyArray> NewPropertyArray(int length,
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PretenureFlag pretenure = NOT_TENURED);
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// Tries allocating a fixed array initialized with undefined values.
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// In case of an allocation failure (OOM) an empty handle is returned.
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// The caller has to manually signal an
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// v8::internal::Heap::FatalProcessOutOfMemory typically by calling
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// NewFixedArray as a fallback.
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V8_WARN_UNUSED_RESULT
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MaybeHandle<FixedArray> TryNewFixedArray(
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int length, PretenureFlag pretenure = NOT_TENURED);
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// Allocate a new fixed array with non-existing entries (the hole).
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Handle<FixedArray> NewFixedArrayWithHoles(
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int length, PretenureFlag pretenure = NOT_TENURED);
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// Allocates an uninitialized fixed array. It must be filled by the caller.
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Handle<FixedArray> NewUninitializedFixedArray(
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int length, PretenureFlag pretenure = NOT_TENURED);
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// Allocates a feedback vector whose slots are initialized with undefined
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// values.
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Handle<FeedbackVector> NewFeedbackVector(
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Handle<SharedFunctionInfo> shared, PretenureFlag pretenure = NOT_TENURED);
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// Allocates a fixed array for name-value pairs of boilerplate properties and
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// calculates the number of properties we need to store in the backing store.
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Handle<ObjectBoilerplateDescription> NewObjectBoilerplateDescription(
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int boilerplate, int all_properties, int index_keys, bool has_seen_proto);
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// Allocate a new uninitialized fixed double array.
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// The function returns a pre-allocated empty fixed array for length = 0,
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// so the return type must be the general fixed array class.
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Handle<FixedArrayBase> NewFixedDoubleArray(
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int length, PretenureFlag pretenure = NOT_TENURED);
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// Allocate a new fixed double array with hole values.
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Handle<FixedArrayBase> NewFixedDoubleArrayWithHoles(
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int size, PretenureFlag pretenure = NOT_TENURED);
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// Allocates a FeedbackMedata object and zeroes the data section.
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Handle<FeedbackMetadata> NewFeedbackMetadata(int slot_count,
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PretenureFlag tenure = TENURED);
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Handle<FrameArray> NewFrameArray(int number_of_frames,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<OrderedHashSet> NewOrderedHashSet();
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Handle<OrderedHashMap> NewOrderedHashMap();
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Handle<SmallOrderedHashSet> NewSmallOrderedHashSet(
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int capacity = SmallOrderedHashSet::kMinCapacity,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<SmallOrderedHashMap> NewSmallOrderedHashMap(
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int capacity = SmallOrderedHashMap::kMinCapacity,
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PretenureFlag pretenure = NOT_TENURED);
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// Create a new PrototypeInfo struct.
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Handle<PrototypeInfo> NewPrototypeInfo();
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// Create a new EnumCache struct.
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Handle<EnumCache> NewEnumCache(Handle<FixedArray> keys,
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Handle<FixedArray> indices);
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// Create a new Tuple2 struct.
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Handle<Tuple2> NewTuple2(Handle<Object> value1, Handle<Object> value2,
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PretenureFlag pretenure);
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// Create a new Tuple3 struct.
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Handle<Tuple3> NewTuple3(Handle<Object> value1, Handle<Object> value2,
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Handle<Object> value3, PretenureFlag pretenure);
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// Create a new ArrayBoilerplateDescription struct.
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Handle<ArrayBoilerplateDescription> NewArrayBoilerplateDescription(
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ElementsKind elements_kind, Handle<FixedArrayBase> constant_values);
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// Create a new TemplateObjectDescription struct.
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Handle<TemplateObjectDescription> NewTemplateObjectDescription(
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Handle<FixedArray> raw_strings, Handle<FixedArray> cooked_strings);
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// Create a pre-tenured empty AccessorPair.
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Handle<AccessorPair> NewAccessorPair();
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// Finds the internalized copy for string in the string table.
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// If not found, a new string is added to the table and returned.
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Handle<String> InternalizeUtf8String(Vector<const char> str);
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Handle<String> InternalizeUtf8String(const char* str) {
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return InternalizeUtf8String(CStrVector(str));
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}
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Handle<String> InternalizeOneByteString(Vector<const uint8_t> str);
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Handle<String> InternalizeOneByteString(Handle<SeqOneByteString>, int from,
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int length);
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Handle<String> InternalizeTwoByteString(Vector<const uc16> str);
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template <class StringTableKey>
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Handle<String> InternalizeStringWithKey(StringTableKey* key);
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// Internalized strings are created in the old generation (data space).
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inline Handle<String> InternalizeString(Handle<String> string);
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inline Handle<Name> InternalizeName(Handle<Name> name);
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// String creation functions. Most of the string creation functions take
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// a Heap::PretenureFlag argument to optionally request that they be
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// allocated in the old generation. The pretenure flag defaults to
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// DONT_TENURE.
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//
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// Creates a new String object. There are two String encodings: one-byte and
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// two-byte. One should choose between the three string factory functions
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// based on the encoding of the string buffer that the string is
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// initialized from.
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// - ...FromOneByte initializes the string from a buffer that is Latin1
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// encoded (it does not check that the buffer is Latin1 encoded) and
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// the result will be Latin1 encoded.
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// - ...FromUtf8 initializes the string from a buffer that is UTF-8
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// encoded. If the characters are all ASCII characters, the result
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// will be Latin1 encoded, otherwise it will converted to two-byte.
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// - ...FromTwoByte initializes the string from a buffer that is two-byte
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// encoded. If the characters are all Latin1 characters, the result
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// will be converted to Latin1, otherwise it will be left as two-byte.
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//
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// One-byte strings are pretenured when used as keys in the SourceCodeCache.
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V8_WARN_UNUSED_RESULT MaybeHandle<String> NewStringFromOneByte(
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Vector<const uint8_t> str, PretenureFlag pretenure = NOT_TENURED);
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template <size_t N>
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inline Handle<String> NewStringFromStaticChars(
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const char (&str)[N], PretenureFlag pretenure = NOT_TENURED) {
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DCHECK(N == StrLength(str) + 1);
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return NewStringFromOneByte(STATIC_CHAR_VECTOR(str), pretenure)
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.ToHandleChecked();
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}
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inline Handle<String> NewStringFromAsciiChecked(
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const char* str, PretenureFlag pretenure = NOT_TENURED) {
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return NewStringFromOneByte(OneByteVector(str), pretenure)
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.ToHandleChecked();
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}
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// UTF8 strings are pretenured when used for regexp literal patterns and
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// flags in the parser.
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V8_WARN_UNUSED_RESULT MaybeHandle<String> NewStringFromUtf8(
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Vector<const char> str, PretenureFlag pretenure = NOT_TENURED);
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V8_WARN_UNUSED_RESULT MaybeHandle<String> NewStringFromUtf8SubString(
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Handle<SeqOneByteString> str, int begin, int end,
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PretenureFlag pretenure = NOT_TENURED);
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V8_WARN_UNUSED_RESULT MaybeHandle<String> NewStringFromTwoByte(
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Vector<const uc16> str, PretenureFlag pretenure = NOT_TENURED);
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V8_WARN_UNUSED_RESULT MaybeHandle<String> NewStringFromTwoByte(
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const ZoneVector<uc16>* str, PretenureFlag pretenure = NOT_TENURED);
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Handle<JSStringIterator> NewJSStringIterator(Handle<String> string);
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// Allocates an internalized string in old space based on the character
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// stream.
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Handle<String> NewInternalizedStringFromUtf8(Vector<const char> str,
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int chars, uint32_t hash_field);
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Handle<String> NewOneByteInternalizedString(Vector<const uint8_t> str,
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uint32_t hash_field);
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Handle<String> NewOneByteInternalizedSubString(
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Handle<SeqOneByteString> string, int offset, int length,
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uint32_t hash_field);
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Handle<String> NewTwoByteInternalizedString(Vector<const uc16> str,
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uint32_t hash_field);
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Handle<String> NewInternalizedStringImpl(Handle<String> string, int chars,
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uint32_t hash_field);
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// Compute the matching internalized string map for a string if possible.
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// Empty handle is returned if string is in new space or not flattened.
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V8_WARN_UNUSED_RESULT MaybeHandle<Map> InternalizedStringMapForString(
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Handle<String> string);
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// Creates an internalized copy of an external string. |string| must be
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// of type StringClass.
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template <class StringClass>
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Handle<StringClass> InternalizeExternalString(Handle<String> string);
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// Allocates and partially initializes an one-byte or two-byte String. The
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// characters of the string are uninitialized. Currently used in regexp code
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// only, where they are pretenured.
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V8_WARN_UNUSED_RESULT MaybeHandle<SeqOneByteString> NewRawOneByteString(
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int length, PretenureFlag pretenure = NOT_TENURED);
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V8_WARN_UNUSED_RESULT MaybeHandle<SeqTwoByteString> NewRawTwoByteString(
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int length, PretenureFlag pretenure = NOT_TENURED);
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// Creates a single character string where the character has given code.
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// A cache is used for Latin1 codes.
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Handle<String> LookupSingleCharacterStringFromCode(uint32_t code);
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// Create a new cons string object which consists of a pair of strings.
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V8_WARN_UNUSED_RESULT MaybeHandle<String> NewConsString(Handle<String> left,
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Handle<String> right);
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V8_WARN_UNUSED_RESULT Handle<String> NewConsString(Handle<String> left,
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Handle<String> right,
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int length, bool one_byte);
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// Create or lookup a single characters tring made up of a utf16 surrogate
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// pair.
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Handle<String> NewSurrogatePairString(uint16_t lead, uint16_t trail);
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// Create a new string object which holds a proper substring of a string.
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Handle<String> NewProperSubString(Handle<String> str, int begin, int end);
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// Create a new string object which holds a substring of a string.
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inline Handle<String> NewSubString(Handle<String> str, int begin, int end);
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// Creates a new external String object. There are two String encodings
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// in the system: one-byte and two-byte. Unlike other String types, it does
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// not make sense to have a UTF-8 factory function for external strings,
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// because we cannot change the underlying buffer. Note that these strings
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// are backed by a string resource that resides outside the V8 heap.
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V8_WARN_UNUSED_RESULT MaybeHandle<String> NewExternalStringFromOneByte(
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const ExternalOneByteString::Resource* resource);
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V8_WARN_UNUSED_RESULT MaybeHandle<String> NewExternalStringFromTwoByte(
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const ExternalTwoByteString::Resource* resource);
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// Create a new external string object for one-byte encoded native script.
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// It does not cache the resource data pointer.
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Handle<ExternalOneByteString> NewNativeSourceString(
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const ExternalOneByteString::Resource* resource);
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// Create a symbol in old or read-only space.
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Handle<Symbol> NewSymbol(PretenureFlag pretenure = TENURED);
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Handle<Symbol> NewPrivateSymbol(PretenureFlag pretenure = TENURED);
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Handle<Symbol> NewPrivateFieldSymbol();
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// Create a global (but otherwise uninitialized) context.
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Handle<NativeContext> NewNativeContext();
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// Create a script context.
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Handle<Context> NewScriptContext(Handle<NativeContext> outer,
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Handle<ScopeInfo> scope_info);
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// Create an empty script context table.
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Handle<ScriptContextTable> NewScriptContextTable();
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// Create a module context.
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Handle<Context> NewModuleContext(Handle<Module> module,
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Handle<NativeContext> outer,
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Handle<ScopeInfo> scope_info);
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// Create a function or eval context.
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Handle<Context> NewFunctionContext(Handle<Context> outer,
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Handle<ScopeInfo> scope_info);
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// Create a catch context.
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Handle<Context> NewCatchContext(Handle<Context> previous,
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Handle<ScopeInfo> scope_info,
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Handle<Object> thrown_object);
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// Create a 'with' context.
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Handle<Context> NewWithContext(Handle<Context> previous,
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Handle<ScopeInfo> scope_info,
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Handle<JSReceiver> extension);
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Handle<Context> NewDebugEvaluateContext(Handle<Context> previous,
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Handle<ScopeInfo> scope_info,
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Handle<JSReceiver> extension,
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Handle<Context> wrapped,
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Handle<StringSet> whitelist);
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// Create a block context.
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Handle<Context> NewBlockContext(Handle<Context> previous,
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Handle<ScopeInfo> scope_info);
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// Create a context that's used by builtin functions.
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//
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// These are similar to function context but don't have a previous
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// context or any scope info. These are used to store spec defined
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// context values.
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Handle<Context> NewBuiltinContext(Handle<NativeContext> native_context,
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int length);
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Handle<Struct> NewStruct(InstanceType type,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<AliasedArgumentsEntry> NewAliasedArgumentsEntry(
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int aliased_context_slot);
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Handle<AccessorInfo> NewAccessorInfo();
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Handle<Script> NewScript(Handle<String> source,
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PretenureFlag tenure = TENURED);
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Handle<Script> NewScriptWithId(Handle<String> source, int script_id,
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PretenureFlag tenure = TENURED);
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Handle<Script> CloneScript(Handle<Script> script);
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Handle<BreakPointInfo> NewBreakPointInfo(int source_position);
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Handle<BreakPoint> NewBreakPoint(int id, Handle<String> condition);
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Handle<StackFrameInfo> NewStackFrameInfo();
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Handle<SourcePositionTableWithFrameCache>
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NewSourcePositionTableWithFrameCache(
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Handle<ByteArray> source_position_table,
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Handle<SimpleNumberDictionary> stack_frame_cache);
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// Allocate various microtasks.
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Handle<CallableTask> NewCallableTask(Handle<JSReceiver> callable,
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Handle<Context> context);
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Handle<CallbackTask> NewCallbackTask(Handle<Foreign> callback,
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Handle<Foreign> data);
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Handle<PromiseResolveThenableJobTask> NewPromiseResolveThenableJobTask(
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Handle<JSPromise> promise_to_resolve, Handle<JSReceiver> then,
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Handle<JSReceiver> thenable, Handle<Context> context);
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// Foreign objects are pretenured when allocated by the bootstrapper.
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Handle<Foreign> NewForeign(Address addr,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<ByteArray> NewByteArray(int length,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<BytecodeArray> NewBytecodeArray(int length, const byte* raw_bytecodes,
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int frame_size, int parameter_count,
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Handle<FixedArray> constant_pool);
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Handle<FixedTypedArrayBase> NewFixedTypedArrayWithExternalPointer(
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int length, ExternalArrayType array_type, void* external_pointer,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<FixedTypedArrayBase> NewFixedTypedArray(
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size_t length, size_t byte_length, ExternalArrayType array_type,
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bool initialize, PretenureFlag pretenure = NOT_TENURED);
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Handle<Cell> NewCell(Handle<Object> value);
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Handle<PropertyCell> NewPropertyCell(Handle<Name> name,
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PretenureFlag pretenure = TENURED);
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Handle<FeedbackCell> NewNoClosuresCell(Handle<HeapObject> value);
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Handle<FeedbackCell> NewOneClosureCell(Handle<HeapObject> value);
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Handle<FeedbackCell> NewManyClosuresCell(Handle<HeapObject> value);
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Handle<TransitionArray> NewTransitionArray(int number_of_transitions,
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int slack = 0);
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// Allocate a tenured AllocationSite. Its payload is null.
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Handle<AllocationSite> NewAllocationSite(bool with_weak_next);
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// Allocates and initializes a new Map.
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Handle<Map> NewMap(InstanceType type, int instance_size,
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ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
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int inobject_properties = 0);
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// Initializes the fields of a newly created Map. Exposed for tests and
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// heap setup; other code should just call NewMap which takes care of it.
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Map* InitializeMap(Map* map, InstanceType type, int instance_size,
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ElementsKind elements_kind, int inobject_properties);
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// Allocate a block of memory in the given space (filled with a filler).
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// Used as a fall-back for generated code when the space is full.
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Handle<HeapObject> NewFillerObject(int size, bool double_align,
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AllocationSpace space);
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Handle<JSObject> NewFunctionPrototype(Handle<JSFunction> function);
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// Returns a deep copy of the JavaScript object.
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// Properties and elements are copied too.
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Handle<JSObject> CopyJSObject(Handle<JSObject> object);
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// Same as above, but also takes an AllocationSite to be appended in an
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// AllocationMemento.
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Handle<JSObject> CopyJSObjectWithAllocationSite(Handle<JSObject> object,
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Handle<AllocationSite> site);
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Handle<FixedArray> CopyFixedArrayWithMap(Handle<FixedArray> array,
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Handle<Map> map);
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Handle<FixedArray> CopyFixedArrayAndGrow(
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Handle<FixedArray> array, int grow_by,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<WeakFixedArray> CopyWeakFixedArrayAndGrow(
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Handle<WeakFixedArray> array, int grow_by,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<WeakArrayList> CopyWeakArrayListAndGrow(
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Handle<WeakArrayList> array, int grow_by,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<PropertyArray> CopyPropertyArrayAndGrow(
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Handle<PropertyArray> array, int grow_by,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<FixedArray> CopyFixedArrayUpTo(Handle<FixedArray> array, int new_len,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
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// This method expects a COW array in new space, and creates a copy
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// of it in old space.
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Handle<FixedArray> CopyAndTenureFixedCOWArray(Handle<FixedArray> array);
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Handle<FixedDoubleArray> CopyFixedDoubleArray(Handle<FixedDoubleArray> array);
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Handle<FeedbackVector> CopyFeedbackVector(Handle<FeedbackVector> array);
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// Numbers (e.g. literals) are pretenured by the parser.
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// The return value may be a smi or a heap number.
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Handle<Object> NewNumber(double value, PretenureFlag pretenure = NOT_TENURED);
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Handle<Object> NewNumberFromInt(int32_t value,
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PretenureFlag pretenure = NOT_TENURED);
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Handle<Object> NewNumberFromUint(uint32_t value,
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PretenureFlag pretenure = NOT_TENURED);
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inline Handle<Object> NewNumberFromSize(
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size_t value, PretenureFlag pretenure = NOT_TENURED);
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inline Handle<Object> NewNumberFromInt64(
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int64_t value, PretenureFlag pretenure = NOT_TENURED);
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inline Handle<HeapNumber> NewHeapNumber(
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double value, PretenureFlag pretenure = NOT_TENURED);
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inline Handle<HeapNumber> NewHeapNumberFromBits(
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uint64_t bits, PretenureFlag pretenure = NOT_TENURED);
|
|
// Creates heap number object with not yet set value field.
|
Handle<HeapNumber> NewHeapNumber(PretenureFlag pretenure = NOT_TENURED);
|
|
Handle<MutableHeapNumber> NewMutableHeapNumber(
|
PretenureFlag pretenure = NOT_TENURED);
|
inline Handle<MutableHeapNumber> NewMutableHeapNumber(
|
double value, PretenureFlag pretenure = NOT_TENURED);
|
inline Handle<MutableHeapNumber> NewMutableHeapNumberFromBits(
|
uint64_t bits, PretenureFlag pretenure = NOT_TENURED);
|
inline Handle<MutableHeapNumber> NewMutableHeapNumberWithHoleNaN(
|
PretenureFlag pretenure = NOT_TENURED);
|
|
// Allocates a new BigInt with {length} digits. Only to be used by
|
// MutableBigInt::New*.
|
Handle<FreshlyAllocatedBigInt> NewBigInt(
|
int length, PretenureFlag pretenure = NOT_TENURED);
|
|
Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length);
|
|
// Allocates and initializes a new JavaScript object based on a
|
// constructor.
|
// JS objects are pretenured when allocated by the bootstrapper and
|
// runtime.
|
Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
|
PretenureFlag pretenure = NOT_TENURED);
|
// JSObject without a prototype.
|
Handle<JSObject> NewJSObjectWithNullProto(
|
PretenureFlag pretenure = NOT_TENURED);
|
|
// Global objects are pretenured and initialized based on a constructor.
|
Handle<JSGlobalObject> NewJSGlobalObject(Handle<JSFunction> constructor);
|
|
// Allocates and initializes a new JavaScript object based on a map.
|
// Passing an allocation site means that a memento will be created that
|
// points to the site.
|
// JS objects are pretenured when allocated by the bootstrapper and
|
// runtime.
|
Handle<JSObject> NewJSObjectFromMap(
|
Handle<Map> map, PretenureFlag pretenure = NOT_TENURED,
|
Handle<AllocationSite> allocation_site = Handle<AllocationSite>::null());
|
Handle<JSObject> NewSlowJSObjectFromMap(
|
Handle<Map> map,
|
int number_of_slow_properties = NameDictionary::kInitialCapacity,
|
PretenureFlag pretenure = NOT_TENURED);
|
|
// JS arrays are pretenured when allocated by the parser.
|
|
// Create a JSArray with a specified length and elements initialized
|
// according to the specified mode.
|
Handle<JSArray> NewJSArray(
|
ElementsKind elements_kind, int length, int capacity,
|
ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS,
|
PretenureFlag pretenure = NOT_TENURED);
|
|
Handle<JSArray> NewJSArray(
|
int capacity, ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
|
PretenureFlag pretenure = NOT_TENURED) {
|
if (capacity != 0) {
|
elements_kind = GetHoleyElementsKind(elements_kind);
|
}
|
return NewJSArray(elements_kind, 0, capacity,
|
INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE, pretenure);
|
}
|
|
// Create a JSArray with the given elements.
|
Handle<JSArray> NewJSArrayWithElements(Handle<FixedArrayBase> elements,
|
ElementsKind elements_kind, int length,
|
PretenureFlag pretenure = NOT_TENURED);
|
|
inline Handle<JSArray> NewJSArrayWithElements(
|
Handle<FixedArrayBase> elements,
|
ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
|
PretenureFlag pretenure = NOT_TENURED);
|
|
void NewJSArrayStorage(
|
Handle<JSArray> array, int length, int capacity,
|
ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS);
|
|
Handle<JSWeakMap> NewJSWeakMap();
|
|
Handle<JSGeneratorObject> NewJSGeneratorObject(Handle<JSFunction> function);
|
|
Handle<JSModuleNamespace> NewJSModuleNamespace();
|
|
Handle<Module> NewModule(Handle<SharedFunctionInfo> code);
|
|
Handle<JSArrayBuffer> NewJSArrayBuffer(
|
SharedFlag shared = SharedFlag::kNotShared,
|
PretenureFlag pretenure = NOT_TENURED);
|
|
static void TypeAndSizeForElementsKind(ElementsKind kind,
|
ExternalArrayType* array_type,
|
size_t* element_size);
|
|
Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
|
PretenureFlag pretenure = NOT_TENURED);
|
|
Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind,
|
PretenureFlag pretenure = NOT_TENURED);
|
|
// Creates a new JSTypedArray with the specified buffer.
|
Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
|
Handle<JSArrayBuffer> buffer,
|
size_t byte_offset, size_t length,
|
PretenureFlag pretenure = NOT_TENURED);
|
|
// Creates a new on-heap JSTypedArray.
|
Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind,
|
size_t number_of_elements,
|
PretenureFlag pretenure = NOT_TENURED);
|
|
Handle<JSDataView> NewJSDataView(Handle<JSArrayBuffer> buffer,
|
size_t byte_offset, size_t byte_length);
|
|
Handle<JSIteratorResult> NewJSIteratorResult(Handle<Object> value, bool done);
|
Handle<JSAsyncFromSyncIterator> NewJSAsyncFromSyncIterator(
|
Handle<JSReceiver> sync_iterator, Handle<Object> next);
|
|
Handle<JSMap> NewJSMap();
|
Handle<JSSet> NewJSSet();
|
|
Handle<JSMapIterator> NewJSMapIterator(Handle<Map> map,
|
Handle<OrderedHashMap> table,
|
int index);
|
Handle<JSSetIterator> NewJSSetIterator(Handle<Map> map,
|
Handle<OrderedHashSet> table,
|
int index);
|
|
// Allocates a bound function.
|
MaybeHandle<JSBoundFunction> NewJSBoundFunction(
|
Handle<JSReceiver> target_function, Handle<Object> bound_this,
|
Vector<Handle<Object>> bound_args);
|
|
// Allocates a Harmony proxy.
|
Handle<JSProxy> NewJSProxy(Handle<JSReceiver> target,
|
Handle<JSReceiver> handler);
|
|
// Reinitialize an JSGlobalProxy based on a constructor. The object
|
// must have the same size as objects allocated using the
|
// constructor. The object is reinitialized and behaves as an
|
// object that has been freshly allocated using the constructor.
|
void ReinitializeJSGlobalProxy(Handle<JSGlobalProxy> global,
|
Handle<JSFunction> constructor);
|
|
Handle<JSGlobalProxy> NewUninitializedJSGlobalProxy(int size);
|
|
// Creates a new JSFunction according to the given args. This is the function
|
// you'll probably want to use when creating a JSFunction from the runtime.
|
Handle<JSFunction> NewFunction(const NewFunctionArgs& args);
|
|
// For testing only. Creates a sloppy function without code.
|
Handle<JSFunction> NewFunctionForTest(Handle<String> name);
|
|
// Function creation from SharedFunctionInfo.
|
|
Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
|
Handle<Map> initial_map, Handle<SharedFunctionInfo> function_info,
|
Handle<Context> context, Handle<FeedbackCell> feedback_cell,
|
PretenureFlag pretenure = TENURED);
|
|
Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
|
Handle<SharedFunctionInfo> function_info, Handle<Context> context,
|
Handle<FeedbackCell> feedback_cell, PretenureFlag pretenure = TENURED);
|
|
Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
|
Handle<Map> initial_map, Handle<SharedFunctionInfo> function_info,
|
Handle<Context> context, PretenureFlag pretenure = TENURED);
|
|
Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
|
Handle<SharedFunctionInfo> function_info, Handle<Context> context,
|
PretenureFlag pretenure = TENURED);
|
|
// The choke-point for JSFunction creation. Handles allocation and
|
// initialization. All other utility methods call into this.
|
Handle<JSFunction> NewFunction(Handle<Map> map,
|
Handle<SharedFunctionInfo> info,
|
Handle<Context> context,
|
PretenureFlag pretenure = TENURED);
|
|
// Create a serialized scope info.
|
Handle<ScopeInfo> NewScopeInfo(int length);
|
|
Handle<ModuleInfo> NewModuleInfo();
|
|
Handle<PreParsedScopeData> NewPreParsedScopeData(int length);
|
|
Handle<UncompiledDataWithoutPreParsedScope>
|
NewUncompiledDataWithoutPreParsedScope(Handle<String> inferred_name,
|
int32_t start_position,
|
int32_t end_position,
|
int32_t function_literal_id);
|
|
Handle<UncompiledDataWithPreParsedScope> NewUncompiledDataWithPreParsedScope(
|
Handle<String> inferred_name, int32_t start_position,
|
int32_t end_position, int32_t function_literal_id,
|
Handle<PreParsedScopeData>);
|
|
// Create an External object for V8's external API.
|
Handle<JSObject> NewExternal(void* value);
|
|
// Creates a new CodeDataContainer for a Code object.
|
Handle<CodeDataContainer> NewCodeDataContainer(int flags);
|
|
// Allocates a new code object (fully initialized). All header fields of the
|
// returned object are immutable and the code object is write protected.
|
// The reference to the Code object is stored in self_reference.
|
// This allows generated code to reference its own Code object
|
// by containing this handle.
|
Handle<Code> NewCode(const CodeDesc& desc, Code::Kind kind,
|
Handle<Object> self_reference,
|
int32_t builtin_index = Builtins::kNoBuiltinId,
|
MaybeHandle<ByteArray> maybe_source_position_table =
|
MaybeHandle<ByteArray>(),
|
MaybeHandle<DeoptimizationData> maybe_deopt_data =
|
MaybeHandle<DeoptimizationData>(),
|
Movability movability = kMovable, uint32_t stub_key = 0,
|
bool is_turbofanned = false, int stack_slots = 0,
|
int safepoint_table_offset = 0,
|
int handler_table_offset = 0);
|
|
// Like NewCode, this function allocates a new code object (fully
|
// initialized). It may return an empty handle if the allocation does not
|
// succeed.
|
V8_WARN_UNUSED_RESULT MaybeHandle<Code> TryNewCode(
|
const CodeDesc& desc, Code::Kind kind, Handle<Object> self_reference,
|
int32_t builtin_index = Builtins::kNoBuiltinId,
|
MaybeHandle<ByteArray> maybe_source_position_table =
|
MaybeHandle<ByteArray>(),
|
MaybeHandle<DeoptimizationData> maybe_deopt_data =
|
MaybeHandle<DeoptimizationData>(),
|
Movability movability = kMovable, uint32_t stub_key = 0,
|
bool is_turbofanned = false, int stack_slots = 0,
|
int safepoint_table_offset = 0, int handler_table_offset = 0);
|
|
// Allocates a new, empty code object for use by builtin deserialization. The
|
// given {size} argument specifies the size of the entire code object.
|
// Can only be used when code space is unprotected and requires manual
|
// initialization by the caller.
|
Handle<Code> NewCodeForDeserialization(uint32_t size);
|
|
// Allocates a new code object and initializes it as the trampoline to the
|
// given off-heap entry point.
|
Handle<Code> NewOffHeapTrampolineFor(Handle<Code> code,
|
Address off_heap_entry);
|
|
Handle<Code> CopyCode(Handle<Code> code);
|
|
Handle<BytecodeArray> CopyBytecodeArray(Handle<BytecodeArray>);
|
|
// Interface for creating error objects.
|
Handle<Object> NewError(Handle<JSFunction> constructor,
|
Handle<String> message);
|
|
Handle<Object> NewInvalidStringLengthError();
|
|
inline Handle<Object> NewURIError();
|
|
Handle<Object> NewError(Handle<JSFunction> constructor,
|
MessageTemplate::Template template_index,
|
Handle<Object> arg0 = Handle<Object>(),
|
Handle<Object> arg1 = Handle<Object>(),
|
Handle<Object> arg2 = Handle<Object>());
|
|
#define DECLARE_ERROR(NAME) \
|
Handle<Object> New##NAME(MessageTemplate::Template template_index, \
|
Handle<Object> arg0 = Handle<Object>(), \
|
Handle<Object> arg1 = Handle<Object>(), \
|
Handle<Object> arg2 = Handle<Object>());
|
DECLARE_ERROR(Error)
|
DECLARE_ERROR(EvalError)
|
DECLARE_ERROR(RangeError)
|
DECLARE_ERROR(ReferenceError)
|
DECLARE_ERROR(SyntaxError)
|
DECLARE_ERROR(TypeError)
|
DECLARE_ERROR(WasmCompileError)
|
DECLARE_ERROR(WasmLinkError)
|
DECLARE_ERROR(WasmRuntimeError)
|
#undef DECLARE_ERROR
|
|
Handle<String> NumberToString(Handle<Object> number, bool check_cache = true);
|
Handle<String> NumberToString(Smi* number, bool check_cache = true);
|
|
inline Handle<String> Uint32ToString(uint32_t value,
|
bool check_cache = false);
|
|
#define ROOT_ACCESSOR(type, name, camel_name) inline Handle<type> name();
|
ROOT_LIST(ROOT_ACCESSOR)
|
#undef ROOT_ACCESSOR
|
|
#define STRUCT_MAP_ACCESSOR(NAME, Name, name) inline Handle<Map> name##_map();
|
STRUCT_LIST(STRUCT_MAP_ACCESSOR)
|
#undef STRUCT_MAP_ACCESSOR
|
|
#define ALLOCATION_SITE_MAP_ACCESSOR(NAME, Name, Size, name) \
|
inline Handle<Map> name##_map();
|
ALLOCATION_SITE_LIST(ALLOCATION_SITE_MAP_ACCESSOR)
|
#undef ALLOCATION_SITE_MAP_ACCESSOR
|
|
#define DATA_HANDLER_MAP_ACCESSOR(NAME, Name, Size, name) \
|
inline Handle<Map> name##_map();
|
DATA_HANDLER_LIST(DATA_HANDLER_MAP_ACCESSOR)
|
#undef DATA_HANDLER_MAP_ACCESSOR
|
|
#define STRING_ACCESSOR(name, str) inline Handle<String> name();
|
INTERNALIZED_STRING_LIST(STRING_ACCESSOR)
|
#undef STRING_ACCESSOR
|
|
#define SYMBOL_ACCESSOR(name) inline Handle<Symbol> name();
|
PRIVATE_SYMBOL_LIST(SYMBOL_ACCESSOR)
|
#undef SYMBOL_ACCESSOR
|
|
#define SYMBOL_ACCESSOR(name, description) inline Handle<Symbol> name();
|
PUBLIC_SYMBOL_LIST(SYMBOL_ACCESSOR)
|
WELL_KNOWN_SYMBOL_LIST(SYMBOL_ACCESSOR)
|
#undef SYMBOL_ACCESSOR
|
|
#define ACCESSOR_INFO_ACCESSOR(accessor_name, AccessorName) \
|
inline Handle<AccessorInfo> accessor_name##_accessor();
|
ACCESSOR_INFO_LIST(ACCESSOR_INFO_ACCESSOR)
|
#undef ACCESSOR_INFO_ACCESSOR
|
|
// Allocates a new SharedFunctionInfo object.
|
Handle<SharedFunctionInfo> NewSharedFunctionInfoForApiFunction(
|
MaybeHandle<String> maybe_name,
|
Handle<FunctionTemplateInfo> function_template_info, FunctionKind kind);
|
|
Handle<SharedFunctionInfo> NewSharedFunctionInfoForBuiltin(
|
MaybeHandle<String> name, int builtin_index,
|
FunctionKind kind = kNormalFunction);
|
|
Handle<SharedFunctionInfo> NewSharedFunctionInfoForLiteral(
|
FunctionLiteral* literal, Handle<Script> script, bool is_toplevel);
|
|
static bool IsFunctionModeWithPrototype(FunctionMode function_mode) {
|
return (function_mode & kWithPrototypeBits) != 0;
|
}
|
|
static bool IsFunctionModeWithWritablePrototype(FunctionMode function_mode) {
|
return (function_mode & kWithWritablePrototypeBit) != 0;
|
}
|
|
static bool IsFunctionModeWithName(FunctionMode function_mode) {
|
return (function_mode & kWithNameBit) != 0;
|
}
|
|
static bool IsFunctionModeWithHomeObject(FunctionMode function_mode) {
|
return (function_mode & kWithHomeObjectBit) != 0;
|
}
|
|
Handle<Map> CreateSloppyFunctionMap(
|
FunctionMode function_mode, MaybeHandle<JSFunction> maybe_empty_function);
|
|
Handle<Map> CreateStrictFunctionMap(FunctionMode function_mode,
|
Handle<JSFunction> empty_function);
|
|
Handle<Map> CreateClassFunctionMap(Handle<JSFunction> empty_function);
|
|
// Allocates a new JSMessageObject object.
|
Handle<JSMessageObject> NewJSMessageObject(MessageTemplate::Template message,
|
Handle<Object> argument,
|
int start_position,
|
int end_position,
|
Handle<Script> script,
|
Handle<Object> stack_frames);
|
|
Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared);
|
|
Handle<CoverageInfo> NewCoverageInfo(const ZoneVector<SourceRange>& slots);
|
|
// Return a map for given number of properties using the map cache in the
|
// native context.
|
Handle<Map> ObjectLiteralMapFromCache(Handle<NativeContext> native_context,
|
int number_of_properties);
|
|
Handle<LoadHandler> NewLoadHandler(int data_count);
|
Handle<StoreHandler> NewStoreHandler(int data_count);
|
|
Handle<RegExpMatchInfo> NewRegExpMatchInfo();
|
|
// Creates a new FixedArray that holds the data associated with the
|
// atom regexp and stores it in the regexp.
|
void SetRegExpAtomData(Handle<JSRegExp> regexp, JSRegExp::Type type,
|
Handle<String> source, JSRegExp::Flags flags,
|
Handle<Object> match_pattern);
|
|
// Creates a new FixedArray that holds the data associated with the
|
// irregexp regexp and stores it in the regexp.
|
void SetRegExpIrregexpData(Handle<JSRegExp> regexp, JSRegExp::Type type,
|
Handle<String> source, JSRegExp::Flags flags,
|
int capture_count);
|
|
// Returns the value for a known global constant (a property of the global
|
// object which is neither configurable nor writable) like 'undefined'.
|
// Returns a null handle when the given name is unknown.
|
Handle<Object> GlobalConstantFor(Handle<Name> name);
|
|
// Converts the given boolean condition to JavaScript boolean value.
|
Handle<Object> ToBoolean(bool value);
|
|
// Converts the given ToPrimitive hint to it's string representation.
|
Handle<String> ToPrimitiveHintString(ToPrimitiveHint hint);
|
|
Handle<JSPromise> NewJSPromise(PretenureFlag pretenure = NOT_TENURED);
|
|
Handle<CallHandlerInfo> NewCallHandlerInfo(bool has_no_side_effect = false);
|
|
HeapObject* NewForTest(Handle<Map> map, PretenureFlag pretenure) {
|
return New(map, pretenure);
|
}
|
|
private:
|
Isolate* isolate() {
|
// Downcast to the privately inherited sub-class using c-style casts to
|
// avoid undefined behavior (as static_cast cannot cast across private
|
// bases).
|
return (Isolate*)this; // NOLINT(readability/casting)
|
}
|
|
HeapObject* AllocateRawWithImmortalMap(
|
int size, PretenureFlag pretenure, Map* map,
|
AllocationAlignment alignment = kWordAligned);
|
HeapObject* AllocateRawWithAllocationSite(
|
Handle<Map> map, PretenureFlag pretenure,
|
Handle<AllocationSite> allocation_site);
|
|
// Allocate memory for an uninitialized array (e.g., a FixedArray or similar).
|
HeapObject* AllocateRawArray(int size, PretenureFlag pretenure);
|
HeapObject* AllocateRawFixedArray(int length, PretenureFlag pretenure);
|
HeapObject* AllocateRawWeakArrayList(int length, PretenureFlag pretenure);
|
Handle<FixedArray> NewFixedArrayWithFiller(Heap::RootListIndex map_root_index,
|
int length, Object* filler,
|
PretenureFlag pretenure);
|
|
// Creates a heap object based on the map. The fields of the heap object are
|
// not initialized, it's the responsibility of the caller to do that.
|
HeapObject* New(Handle<Map> map, PretenureFlag pretenure);
|
|
template <typename T>
|
Handle<T> CopyArrayWithMap(Handle<T> src, Handle<Map> map);
|
template <typename T>
|
Handle<T> CopyArrayAndGrow(Handle<T> src, int grow_by,
|
PretenureFlag pretenure);
|
|
template <bool is_one_byte, typename T>
|
Handle<String> AllocateInternalizedStringImpl(T t, int chars,
|
uint32_t hash_field);
|
|
Handle<SeqOneByteString> AllocateRawOneByteInternalizedString(
|
int length, uint32_t hash_field);
|
|
Handle<String> AllocateTwoByteInternalizedString(Vector<const uc16> str,
|
uint32_t hash_field);
|
|
MaybeHandle<String> NewStringFromTwoByte(const uc16* string, int length,
|
PretenureFlag pretenure);
|
|
// Attempt to find the number in a small cache. If we finds it, return
|
// the string representation of the number. Otherwise return undefined.
|
Handle<Object> NumberToStringCacheGet(Object* number, int hash);
|
|
// Update the cache with a new number-string pair.
|
Handle<String> NumberToStringCacheSet(Handle<Object> number, int hash,
|
const char* string, bool check_cache);
|
|
// Create a JSArray with no elements and no length.
|
Handle<JSArray> NewJSArray(ElementsKind elements_kind,
|
PretenureFlag pretenure = NOT_TENURED);
|
|
Handle<JSPromise> NewJSPromiseWithoutHook(
|
PretenureFlag pretenure = NOT_TENURED);
|
|
Handle<SharedFunctionInfo> NewSharedFunctionInfo(
|
MaybeHandle<String> name, MaybeHandle<HeapObject> maybe_function_data,
|
int maybe_builtin_index, FunctionKind kind = kNormalFunction);
|
|
void InitializeAllocationMemento(AllocationMemento* memento,
|
AllocationSite* allocation_site);
|
|
// Initializes a JSObject based on its map.
|
void InitializeJSObjectFromMap(Handle<JSObject> obj,
|
Handle<Object> properties, Handle<Map> map);
|
// Initializes JSObject body starting at given offset.
|
void InitializeJSObjectBody(Handle<JSObject> obj, Handle<Map> map,
|
int start_offset);
|
};
|
|
// Utility class to simplify argument handling around JSFunction creation.
|
class NewFunctionArgs final {
|
public:
|
static NewFunctionArgs ForWasm(
|
Handle<String> name,
|
Handle<WasmExportedFunctionData> exported_function_data, Handle<Map> map);
|
static NewFunctionArgs ForBuiltin(Handle<String> name, Handle<Map> map,
|
int builtin_id);
|
static NewFunctionArgs ForFunctionWithoutCode(Handle<String> name,
|
Handle<Map> map,
|
LanguageMode language_mode);
|
static NewFunctionArgs ForBuiltinWithPrototype(
|
Handle<String> name, Handle<Object> prototype, InstanceType type,
|
int instance_size, int inobject_properties, int builtin_id,
|
MutableMode prototype_mutability);
|
static NewFunctionArgs ForBuiltinWithoutPrototype(Handle<String> name,
|
int builtin_id,
|
LanguageMode language_mode);
|
|
Handle<Map> GetMap(Isolate* isolate) const;
|
|
private:
|
NewFunctionArgs() {} // Use the static factory constructors.
|
|
void SetShouldCreateAndSetInitialMap();
|
void SetShouldSetPrototype();
|
void SetShouldSetLanguageMode();
|
|
// Sentinel value.
|
static const int kUninitialized = -1;
|
|
Handle<String> name_;
|
MaybeHandle<Map> maybe_map_;
|
MaybeHandle<WasmExportedFunctionData> maybe_exported_function_data_;
|
|
bool should_create_and_set_initial_map_ = false;
|
InstanceType type_;
|
int instance_size_ = kUninitialized;
|
int inobject_properties_ = kUninitialized;
|
|
bool should_set_prototype_ = false;
|
MaybeHandle<Object> maybe_prototype_;
|
|
bool should_set_language_mode_ = false;
|
LanguageMode language_mode_;
|
|
int maybe_builtin_id_ = kUninitialized;
|
|
MutableMode prototype_mutability_;
|
|
friend class Factory;
|
};
|
|
} // namespace internal
|
} // namespace v8
|
|
#endif // V8_HEAP_FACTORY_H_
|
