Line data Source code
1 : // Copyright 2014 the V8 project authors. All rights reserved.
2 : // Use of this source code is governed by a BSD-style license that can be
3 : // found in the LICENSE file.
4 :
5 : #ifndef V8_HEAP_FACTORY_H_
6 : #define V8_HEAP_FACTORY_H_
7 :
8 : // Clients of this interface shouldn't depend on lots of heap internals.
9 : // Do not include anything from src/heap here!
10 : #include "src/builtins/builtins.h"
11 : #include "src/globals.h"
12 : #include "src/handles.h"
13 : #include "src/heap/heap.h"
14 : #include "src/maybe-handles.h"
15 : #include "src/messages.h"
16 : #include "src/objects/code.h"
17 : #include "src/objects/dictionary.h"
18 : #include "src/objects/hash-table.h"
19 : #include "src/objects/js-array.h"
20 : #include "src/objects/js-regexp.h"
21 : #include "src/objects/ordered-hash-table.h"
22 : #include "src/objects/string.h"
23 :
24 : namespace v8 {
25 : namespace internal {
26 :
27 : // Forward declarations.
28 : class AliasedArgumentsEntry;
29 : class ObjectBoilerplateDescription;
30 : class BreakPoint;
31 : class BreakPointInfo;
32 : class CallableTask;
33 : class CallbackTask;
34 : class CallHandlerInfo;
35 : class Expression;
36 : class EmbedderDataArray;
37 : class ArrayBoilerplateDescription;
38 : class CoverageInfo;
39 : class DebugInfo;
40 : class EnumCache;
41 : class FreshlyAllocatedBigInt;
42 : class Isolate;
43 : class JSDataView;
44 : class JSGeneratorObject;
45 : class JSMap;
46 : class JSMapIterator;
47 : class JSModuleNamespace;
48 : class JSPromise;
49 : class JSProxy;
50 : class JSSet;
51 : class JSSetIterator;
52 : class JSTypedArray;
53 : class JSWeakMap;
54 : class LoadHandler;
55 : class ModuleInfo;
56 : class NativeContext;
57 : class NewFunctionArgs;
58 : class PreparseData;
59 : class PromiseResolveThenableJobTask;
60 : class RegExpMatchInfo;
61 : class ScriptContextTable;
62 : class StackFrameInfo;
63 : class StoreHandler;
64 : class TemplateObjectDescription;
65 : class UncompiledDataWithoutPreparseData;
66 : class UncompiledDataWithPreparseData;
67 : class WasmExportedFunctionData;
68 : class WeakFactoryCleanupJobTask;
69 : struct SourceRange;
70 : template <typename T>
71 : class ZoneVector;
72 : enum class SharedFlag : uint32_t;
73 :
74 : enum FunctionMode {
75 : kWithNameBit = 1 << 0,
76 : kWithHomeObjectBit = 1 << 1,
77 : kWithWritablePrototypeBit = 1 << 2,
78 : kWithReadonlyPrototypeBit = 1 << 3,
79 : kWithPrototypeBits = kWithWritablePrototypeBit | kWithReadonlyPrototypeBit,
80 :
81 : // Without prototype.
82 : FUNCTION_WITHOUT_PROTOTYPE = 0,
83 : METHOD_WITH_NAME = kWithNameBit,
84 : METHOD_WITH_HOME_OBJECT = kWithHomeObjectBit,
85 : METHOD_WITH_NAME_AND_HOME_OBJECT = kWithNameBit | kWithHomeObjectBit,
86 :
87 : // With writable prototype.
88 : FUNCTION_WITH_WRITEABLE_PROTOTYPE = kWithWritablePrototypeBit,
89 : FUNCTION_WITH_NAME_AND_WRITEABLE_PROTOTYPE =
90 : kWithWritablePrototypeBit | kWithNameBit,
91 : FUNCTION_WITH_HOME_OBJECT_AND_WRITEABLE_PROTOTYPE =
92 : kWithWritablePrototypeBit | kWithHomeObjectBit,
93 : FUNCTION_WITH_NAME_AND_HOME_OBJECT_AND_WRITEABLE_PROTOTYPE =
94 : kWithWritablePrototypeBit | kWithNameBit | kWithHomeObjectBit,
95 :
96 : // With readonly prototype.
97 : FUNCTION_WITH_READONLY_PROTOTYPE = kWithReadonlyPrototypeBit,
98 : FUNCTION_WITH_NAME_AND_READONLY_PROTOTYPE =
99 : kWithReadonlyPrototypeBit | kWithNameBit,
100 : };
101 :
102 : // Interface for handle based allocation.
103 : class V8_EXPORT_PRIVATE Factory {
104 : public:
105 : Handle<Oddball> NewOddball(Handle<Map> map, const char* to_string,
106 : Handle<Object> to_number, const char* type_of,
107 : byte kind,
108 : PretenureFlag pretenure = TENURED_READ_ONLY);
109 :
110 : // Marks self references within code generation.
111 : Handle<Oddball> NewSelfReferenceMarker(PretenureFlag pretenure = TENURED);
112 :
113 : // Allocates a fixed array-like object with given map and initialized with
114 : // undefined values.
115 : template <typename T = FixedArray>
116 : Handle<T> NewFixedArrayWithMap(RootIndex map_root_index, int length,
117 : PretenureFlag pretenure = NOT_TENURED);
118 :
119 : // Allocates a weak fixed array-like object with given map and initialized
120 : // with undefined values.
121 : template <typename T = WeakFixedArray>
122 : Handle<T> NewWeakFixedArrayWithMap(RootIndex map_root_index, int length,
123 : PretenureFlag pretenure = NOT_TENURED);
124 :
125 : // Allocates a fixed array initialized with undefined values.
126 : Handle<FixedArray> NewFixedArray(int length,
127 : PretenureFlag pretenure = NOT_TENURED);
128 :
129 : // Allocates a fixed array which may contain in-place weak references. The
130 : // array is initialized with undefined values
131 : Handle<WeakFixedArray> NewWeakFixedArray(
132 : int length, PretenureFlag pretenure = NOT_TENURED);
133 :
134 : // Allocates a property array initialized with undefined values.
135 : Handle<PropertyArray> NewPropertyArray(int length,
136 : PretenureFlag pretenure = NOT_TENURED);
137 : // Tries allocating a fixed array initialized with undefined values.
138 : // In case of an allocation failure (OOM) an empty handle is returned.
139 : // The caller has to manually signal an
140 : // v8::internal::Heap::FatalProcessOutOfMemory typically by calling
141 : // NewFixedArray as a fallback.
142 : V8_WARN_UNUSED_RESULT
143 : MaybeHandle<FixedArray> TryNewFixedArray(
144 : int length, PretenureFlag pretenure = NOT_TENURED);
145 :
146 : // Allocate a new fixed array with non-existing entries (the hole).
147 : Handle<FixedArray> NewFixedArrayWithHoles(
148 : int length, PretenureFlag pretenure = NOT_TENURED);
149 :
150 : // Allocates an uninitialized fixed array. It must be filled by the caller.
151 : Handle<FixedArray> NewUninitializedFixedArray(
152 : int length, PretenureFlag pretenure = NOT_TENURED);
153 :
154 : // Allocates a feedback vector whose slots are initialized with undefined
155 : // values.
156 : Handle<FeedbackVector> NewFeedbackVector(
157 : Handle<SharedFunctionInfo> shared, PretenureFlag pretenure = NOT_TENURED);
158 :
159 : // Allocates a clean embedder data array with given capacity.
160 : Handle<EmbedderDataArray> NewEmbedderDataArray(
161 : int length, PretenureFlag pretenure = NOT_TENURED);
162 :
163 : // Allocates a fixed array for name-value pairs of boilerplate properties and
164 : // calculates the number of properties we need to store in the backing store.
165 : Handle<ObjectBoilerplateDescription> NewObjectBoilerplateDescription(
166 : int boilerplate, int all_properties, int index_keys, bool has_seen_proto);
167 :
168 : // Allocate a new uninitialized fixed double array.
169 : // The function returns a pre-allocated empty fixed array for length = 0,
170 : // so the return type must be the general fixed array class.
171 : Handle<FixedArrayBase> NewFixedDoubleArray(
172 : int length, PretenureFlag pretenure = NOT_TENURED);
173 :
174 : // Allocate a new fixed double array with hole values.
175 : Handle<FixedArrayBase> NewFixedDoubleArrayWithHoles(
176 : int size, PretenureFlag pretenure = NOT_TENURED);
177 :
178 : // Allocates a FeedbackMedata object and zeroes the data section.
179 : Handle<FeedbackMetadata> NewFeedbackMetadata(int slot_count,
180 : PretenureFlag tenure = TENURED);
181 :
182 : Handle<FrameArray> NewFrameArray(int number_of_frames,
183 : PretenureFlag pretenure = NOT_TENURED);
184 :
185 : Handle<OrderedHashSet> NewOrderedHashSet();
186 : Handle<OrderedHashMap> NewOrderedHashMap();
187 : Handle<OrderedNameDictionary> NewOrderedNameDictionary();
188 :
189 : Handle<SmallOrderedHashSet> NewSmallOrderedHashSet(
190 : int capacity = SmallOrderedHashSet::kMinCapacity,
191 : PretenureFlag pretenure = NOT_TENURED);
192 : Handle<SmallOrderedHashMap> NewSmallOrderedHashMap(
193 : int capacity = SmallOrderedHashMap::kMinCapacity,
194 : PretenureFlag pretenure = NOT_TENURED);
195 : Handle<SmallOrderedNameDictionary> NewSmallOrderedNameDictionary(
196 : int capacity = SmallOrderedHashMap::kMinCapacity,
197 : PretenureFlag pretenure = NOT_TENURED);
198 :
199 : // Create a new PrototypeInfo struct.
200 : Handle<PrototypeInfo> NewPrototypeInfo();
201 :
202 : // Create a new EnumCache struct.
203 : Handle<EnumCache> NewEnumCache(Handle<FixedArray> keys,
204 : Handle<FixedArray> indices);
205 :
206 : // Create a new Tuple2 struct.
207 : Handle<Tuple2> NewTuple2(Handle<Object> value1, Handle<Object> value2,
208 : PretenureFlag pretenure);
209 :
210 : // Create a new Tuple3 struct.
211 : Handle<Tuple3> NewTuple3(Handle<Object> value1, Handle<Object> value2,
212 : Handle<Object> value3, PretenureFlag pretenure);
213 :
214 : // Create a new ArrayBoilerplateDescription struct.
215 : Handle<ArrayBoilerplateDescription> NewArrayBoilerplateDescription(
216 : ElementsKind elements_kind, Handle<FixedArrayBase> constant_values);
217 :
218 : // Create a new TemplateObjectDescription struct.
219 : Handle<TemplateObjectDescription> NewTemplateObjectDescription(
220 : Handle<FixedArray> raw_strings, Handle<FixedArray> cooked_strings);
221 :
222 : // Create a pre-tenured empty AccessorPair.
223 : Handle<AccessorPair> NewAccessorPair();
224 :
225 : // Finds the internalized copy for string in the string table.
226 : // If not found, a new string is added to the table and returned.
227 : Handle<String> InternalizeUtf8String(Vector<const char> str);
228 14452590 : Handle<String> InternalizeUtf8String(const char* str) {
229 14452590 : return InternalizeUtf8String(CStrVector(str));
230 : }
231 :
232 : Handle<String> InternalizeOneByteString(Vector<const uint8_t> str);
233 : Handle<String> InternalizeOneByteString(Handle<SeqOneByteString>, int from,
234 : int length);
235 :
236 : Handle<String> InternalizeTwoByteString(Vector<const uc16> str);
237 :
238 : template <class StringTableKey>
239 : Handle<String> InternalizeStringWithKey(StringTableKey* key);
240 :
241 : // Internalized strings are created in the old generation (data space).
242 : inline Handle<String> InternalizeString(Handle<String> string);
243 :
244 : inline Handle<Name> InternalizeName(Handle<Name> name);
245 :
246 : // String creation functions. Most of the string creation functions take
247 : // a Heap::PretenureFlag argument to optionally request that they be
248 : // allocated in the old generation. The pretenure flag defaults to
249 : // DONT_TENURE.
250 : //
251 : // Creates a new String object. There are two String encodings: one-byte and
252 : // two-byte. One should choose between the three string factory functions
253 : // based on the encoding of the string buffer that the string is
254 : // initialized from.
255 : // - ...FromOneByte initializes the string from a buffer that is Latin1
256 : // encoded (it does not check that the buffer is Latin1 encoded) and
257 : // the result will be Latin1 encoded.
258 : // - ...FromUtf8 initializes the string from a buffer that is UTF-8
259 : // encoded. If the characters are all ASCII characters, the result
260 : // will be Latin1 encoded, otherwise it will converted to two-byte.
261 : // - ...FromTwoByte initializes the string from a buffer that is two-byte
262 : // encoded. If the characters are all Latin1 characters, the result
263 : // will be converted to Latin1, otherwise it will be left as two-byte.
264 : //
265 : // One-byte strings are pretenured when used as keys in the SourceCodeCache.
266 : V8_WARN_UNUSED_RESULT MaybeHandle<String> NewStringFromOneByte(
267 : Vector<const uint8_t> str, PretenureFlag pretenure = NOT_TENURED);
268 :
269 : template <size_t N>
270 2591 : inline Handle<String> NewStringFromStaticChars(
271 : const char (&str)[N], PretenureFlag pretenure = NOT_TENURED) {
272 : DCHECK(N == StrLength(str) + 1);
273 : return NewStringFromOneByte(StaticCharVector(str), pretenure)
274 5182 : .ToHandleChecked();
275 : }
276 :
277 37795542 : inline Handle<String> NewStringFromAsciiChecked(
278 : const char* str, PretenureFlag pretenure = NOT_TENURED) {
279 : return NewStringFromOneByte(OneByteVector(str), pretenure)
280 75591086 : .ToHandleChecked();
281 : }
282 :
283 : // UTF8 strings are pretenured when used for regexp literal patterns and
284 : // flags in the parser.
285 : V8_WARN_UNUSED_RESULT MaybeHandle<String> NewStringFromUtf8(
286 : Vector<const char> str, PretenureFlag pretenure = NOT_TENURED);
287 :
288 : V8_WARN_UNUSED_RESULT MaybeHandle<String> NewStringFromUtf8SubString(
289 : Handle<SeqOneByteString> str, int begin, int end,
290 : PretenureFlag pretenure = NOT_TENURED);
291 :
292 : V8_WARN_UNUSED_RESULT MaybeHandle<String> NewStringFromTwoByte(
293 : Vector<const uc16> str, PretenureFlag pretenure = NOT_TENURED);
294 :
295 : V8_WARN_UNUSED_RESULT MaybeHandle<String> NewStringFromTwoByte(
296 : const ZoneVector<uc16>* str, PretenureFlag pretenure = NOT_TENURED);
297 :
298 : Handle<JSStringIterator> NewJSStringIterator(Handle<String> string);
299 :
300 : // Allocates an internalized string in old space based on the character
301 : // stream.
302 : Handle<String> NewInternalizedStringFromUtf8(Vector<const char> str,
303 : int chars, uint32_t hash_field);
304 :
305 : Handle<String> NewOneByteInternalizedString(Vector<const uint8_t> str,
306 : uint32_t hash_field);
307 :
308 : Handle<String> NewOneByteInternalizedSubString(
309 : Handle<SeqOneByteString> string, int offset, int length,
310 : uint32_t hash_field);
311 :
312 : Handle<String> NewTwoByteInternalizedString(Vector<const uc16> str,
313 : uint32_t hash_field);
314 :
315 : Handle<String> NewInternalizedStringImpl(Handle<String> string, int chars,
316 : uint32_t hash_field);
317 :
318 : // Compute the matching internalized string map for a string if possible.
319 : // Empty handle is returned if string is in new space or not flattened.
320 : V8_WARN_UNUSED_RESULT MaybeHandle<Map> InternalizedStringMapForString(
321 : Handle<String> string);
322 :
323 : // Creates an internalized copy of an external string. |string| must be
324 : // of type StringClass.
325 : template <class StringClass>
326 : Handle<StringClass> InternalizeExternalString(Handle<String> string);
327 :
328 : // Allocates and partially initializes an one-byte or two-byte String. The
329 : // characters of the string are uninitialized. Currently used in regexp code
330 : // only, where they are pretenured.
331 : V8_WARN_UNUSED_RESULT MaybeHandle<SeqOneByteString> NewRawOneByteString(
332 : int length, PretenureFlag pretenure = NOT_TENURED);
333 : V8_WARN_UNUSED_RESULT MaybeHandle<SeqTwoByteString> NewRawTwoByteString(
334 : int length, PretenureFlag pretenure = NOT_TENURED);
335 :
336 : // Creates a single character string where the character has given code.
337 : // A cache is used for Latin1 codes.
338 : Handle<String> LookupSingleCharacterStringFromCode(uint32_t code);
339 :
340 : // Create a new cons string object which consists of a pair of strings.
341 : V8_WARN_UNUSED_RESULT MaybeHandle<String> NewConsString(Handle<String> left,
342 : Handle<String> right);
343 :
344 : V8_WARN_UNUSED_RESULT Handle<String> NewConsString(Handle<String> left,
345 : Handle<String> right,
346 : int length, bool one_byte);
347 :
348 : // Create or lookup a single characters tring made up of a utf16 surrogate
349 : // pair.
350 : Handle<String> NewSurrogatePairString(uint16_t lead, uint16_t trail);
351 :
352 : // Create a new string object which holds a proper substring of a string.
353 : Handle<String> NewProperSubString(Handle<String> str, int begin, int end);
354 :
355 : // Create a new string object which holds a substring of a string.
356 : inline Handle<String> NewSubString(Handle<String> str, int begin, int end);
357 :
358 : // Creates a new external String object. There are two String encodings
359 : // in the system: one-byte and two-byte. Unlike other String types, it does
360 : // not make sense to have a UTF-8 factory function for external strings,
361 : // because we cannot change the underlying buffer. Note that these strings
362 : // are backed by a string resource that resides outside the V8 heap.
363 : V8_WARN_UNUSED_RESULT MaybeHandle<String> NewExternalStringFromOneByte(
364 : const ExternalOneByteString::Resource* resource);
365 : V8_WARN_UNUSED_RESULT MaybeHandle<String> NewExternalStringFromTwoByte(
366 : const ExternalTwoByteString::Resource* resource);
367 : // Create a new external string object for one-byte encoded native script.
368 : // It does not cache the resource data pointer.
369 : Handle<ExternalOneByteString> NewNativeSourceString(
370 : const ExternalOneByteString::Resource* resource);
371 :
372 : // Create a symbol in old or read-only space.
373 : Handle<Symbol> NewSymbol(PretenureFlag pretenure = TENURED);
374 : Handle<Symbol> NewPrivateSymbol(PretenureFlag pretenure = TENURED);
375 : Handle<Symbol> NewPrivateNameSymbol(Handle<String> name);
376 :
377 : // Create a global (but otherwise uninitialized) context.
378 : Handle<NativeContext> NewNativeContext();
379 :
380 : // Create a script context.
381 : Handle<Context> NewScriptContext(Handle<NativeContext> outer,
382 : Handle<ScopeInfo> scope_info);
383 :
384 : // Create an empty script context table.
385 : Handle<ScriptContextTable> NewScriptContextTable();
386 :
387 : // Create a module context.
388 : Handle<Context> NewModuleContext(Handle<Module> module,
389 : Handle<NativeContext> outer,
390 : Handle<ScopeInfo> scope_info);
391 :
392 : // Create a function or eval context.
393 : Handle<Context> NewFunctionContext(Handle<Context> outer,
394 : Handle<ScopeInfo> scope_info);
395 :
396 : // Create a catch context.
397 : Handle<Context> NewCatchContext(Handle<Context> previous,
398 : Handle<ScopeInfo> scope_info,
399 : Handle<Object> thrown_object);
400 :
401 : // Create a 'with' context.
402 : Handle<Context> NewWithContext(Handle<Context> previous,
403 : Handle<ScopeInfo> scope_info,
404 : Handle<JSReceiver> extension);
405 :
406 : Handle<Context> NewDebugEvaluateContext(Handle<Context> previous,
407 : Handle<ScopeInfo> scope_info,
408 : Handle<JSReceiver> extension,
409 : Handle<Context> wrapped,
410 : Handle<StringSet> whitelist);
411 :
412 : // Create a block context.
413 : Handle<Context> NewBlockContext(Handle<Context> previous,
414 : Handle<ScopeInfo> scope_info);
415 :
416 : // Create a context that's used by builtin functions.
417 : //
418 : // These are similar to function context but don't have a previous
419 : // context or any scope info. These are used to store spec defined
420 : // context values.
421 : Handle<Context> NewBuiltinContext(Handle<NativeContext> native_context,
422 : int length);
423 :
424 : Handle<Struct> NewStruct(InstanceType type,
425 : PretenureFlag pretenure = NOT_TENURED);
426 :
427 : Handle<AliasedArgumentsEntry> NewAliasedArgumentsEntry(
428 : int aliased_context_slot);
429 :
430 : Handle<AccessorInfo> NewAccessorInfo();
431 :
432 : Handle<Script> NewScript(Handle<String> source,
433 : PretenureFlag tenure = TENURED);
434 : Handle<Script> NewScriptWithId(Handle<String> source, int script_id,
435 : PretenureFlag tenure = TENURED);
436 : Handle<Script> CloneScript(Handle<Script> script);
437 :
438 : Handle<BreakPointInfo> NewBreakPointInfo(int source_position);
439 : Handle<BreakPoint> NewBreakPoint(int id, Handle<String> condition);
440 : Handle<StackFrameInfo> NewStackFrameInfo();
441 : Handle<SourcePositionTableWithFrameCache>
442 : NewSourcePositionTableWithFrameCache(
443 : Handle<ByteArray> source_position_table,
444 : Handle<SimpleNumberDictionary> stack_frame_cache);
445 :
446 : // Allocate various microtasks.
447 : Handle<CallableTask> NewCallableTask(Handle<JSReceiver> callable,
448 : Handle<Context> context);
449 : Handle<CallbackTask> NewCallbackTask(Handle<Foreign> callback,
450 : Handle<Foreign> data);
451 : Handle<PromiseResolveThenableJobTask> NewPromiseResolveThenableJobTask(
452 : Handle<JSPromise> promise_to_resolve, Handle<JSReceiver> then,
453 : Handle<JSReceiver> thenable, Handle<Context> context);
454 : Handle<WeakFactoryCleanupJobTask> NewWeakFactoryCleanupJobTask(
455 : Handle<JSWeakFactory> weak_factory);
456 :
457 : // Foreign objects are pretenured when allocated by the bootstrapper.
458 : Handle<Foreign> NewForeign(Address addr,
459 : PretenureFlag pretenure = NOT_TENURED);
460 :
461 : Handle<ByteArray> NewByteArray(int length,
462 : PretenureFlag pretenure = NOT_TENURED);
463 :
464 : Handle<BytecodeArray> NewBytecodeArray(int length, const byte* raw_bytecodes,
465 : int frame_size, int parameter_count,
466 : Handle<FixedArray> constant_pool);
467 :
468 : Handle<FixedTypedArrayBase> NewFixedTypedArrayWithExternalPointer(
469 : int length, ExternalArrayType array_type, void* external_pointer,
470 : PretenureFlag pretenure = NOT_TENURED);
471 :
472 : Handle<FixedTypedArrayBase> NewFixedTypedArray(
473 : size_t length, size_t byte_length, ExternalArrayType array_type,
474 : bool initialize, PretenureFlag pretenure = NOT_TENURED);
475 :
476 : Handle<Cell> NewCell(Handle<Object> value);
477 :
478 : Handle<PropertyCell> NewPropertyCell(Handle<Name> name,
479 : PretenureFlag pretenure = TENURED);
480 :
481 : Handle<FeedbackCell> NewNoClosuresCell(Handle<HeapObject> value);
482 : Handle<FeedbackCell> NewOneClosureCell(Handle<HeapObject> value);
483 : Handle<FeedbackCell> NewManyClosuresCell(Handle<HeapObject> value);
484 : Handle<FeedbackCell> NewNoFeedbackCell();
485 :
486 : Handle<DescriptorArray> NewDescriptorArray(
487 : int number_of_entries, int slack = 0,
488 : PretenureFlag pretenure = NOT_TENURED);
489 : Handle<TransitionArray> NewTransitionArray(int number_of_transitions,
490 : int slack = 0);
491 :
492 : // Allocate a tenured AllocationSite. Its payload is null.
493 : Handle<AllocationSite> NewAllocationSite(bool with_weak_next);
494 :
495 : // Allocates and initializes a new Map.
496 : Handle<Map> NewMap(InstanceType type, int instance_size,
497 : ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
498 : int inobject_properties = 0);
499 : // Initializes the fields of a newly created Map. Exposed for tests and
500 : // heap setup; other code should just call NewMap which takes care of it.
501 : Map InitializeMap(Map map, InstanceType type, int instance_size,
502 : ElementsKind elements_kind, int inobject_properties);
503 :
504 : // Allocate a block of memory in the given space (filled with a filler).
505 : // Used as a fall-back for generated code when the space is full.
506 : Handle<HeapObject> NewFillerObject(int size, bool double_align,
507 : AllocationSpace space);
508 :
509 : Handle<JSObject> NewFunctionPrototype(Handle<JSFunction> function);
510 :
511 : // Returns a deep copy of the JavaScript object.
512 : // Properties and elements are copied too.
513 : Handle<JSObject> CopyJSObject(Handle<JSObject> object);
514 : // Same as above, but also takes an AllocationSite to be appended in an
515 : // AllocationMemento.
516 : Handle<JSObject> CopyJSObjectWithAllocationSite(Handle<JSObject> object,
517 : Handle<AllocationSite> site);
518 :
519 : Handle<FixedArray> CopyFixedArrayWithMap(Handle<FixedArray> array,
520 : Handle<Map> map);
521 :
522 : Handle<FixedArray> CopyFixedArrayAndGrow(
523 : Handle<FixedArray> array, int grow_by,
524 : PretenureFlag pretenure = NOT_TENURED);
525 :
526 : Handle<WeakFixedArray> CopyWeakFixedArrayAndGrow(
527 : Handle<WeakFixedArray> array, int grow_by,
528 : PretenureFlag pretenure = NOT_TENURED);
529 :
530 : Handle<WeakArrayList> CopyWeakArrayListAndGrow(
531 : Handle<WeakArrayList> array, int grow_by,
532 : PretenureFlag pretenure = NOT_TENURED);
533 :
534 : Handle<PropertyArray> CopyPropertyArrayAndGrow(
535 : Handle<PropertyArray> array, int grow_by,
536 : PretenureFlag pretenure = NOT_TENURED);
537 :
538 : Handle<FixedArray> CopyFixedArrayUpTo(Handle<FixedArray> array, int new_len,
539 : PretenureFlag pretenure = NOT_TENURED);
540 :
541 : Handle<FixedArray> CopyFixedArray(Handle<FixedArray> array);
542 :
543 : // This method expects a COW array in new space, and creates a copy
544 : // of it in old space.
545 : Handle<FixedArray> CopyAndTenureFixedCOWArray(Handle<FixedArray> array);
546 :
547 : Handle<FixedDoubleArray> CopyFixedDoubleArray(Handle<FixedDoubleArray> array);
548 :
549 : Handle<FeedbackVector> CopyFeedbackVector(Handle<FeedbackVector> array);
550 :
551 : // Numbers (e.g. literals) are pretenured by the parser.
552 : // The return value may be a smi or a heap number.
553 : Handle<Object> NewNumber(double value, PretenureFlag pretenure = NOT_TENURED);
554 :
555 : Handle<Object> NewNumberFromInt(int32_t value,
556 : PretenureFlag pretenure = NOT_TENURED);
557 : Handle<Object> NewNumberFromUint(uint32_t value,
558 : PretenureFlag pretenure = NOT_TENURED);
559 : inline Handle<Object> NewNumberFromSize(
560 : size_t value, PretenureFlag pretenure = NOT_TENURED);
561 : inline Handle<Object> NewNumberFromInt64(
562 : int64_t value, PretenureFlag pretenure = NOT_TENURED);
563 : inline Handle<HeapNumber> NewHeapNumber(
564 : double value, PretenureFlag pretenure = NOT_TENURED);
565 : inline Handle<HeapNumber> NewHeapNumberFromBits(
566 : uint64_t bits, PretenureFlag pretenure = NOT_TENURED);
567 :
568 : // Creates heap number object with not yet set value field.
569 : Handle<HeapNumber> NewHeapNumber(PretenureFlag pretenure = NOT_TENURED);
570 :
571 : Handle<MutableHeapNumber> NewMutableHeapNumber(
572 : PretenureFlag pretenure = NOT_TENURED);
573 : inline Handle<MutableHeapNumber> NewMutableHeapNumber(
574 : double value, PretenureFlag pretenure = NOT_TENURED);
575 : inline Handle<MutableHeapNumber> NewMutableHeapNumberFromBits(
576 : uint64_t bits, PretenureFlag pretenure = NOT_TENURED);
577 : inline Handle<MutableHeapNumber> NewMutableHeapNumberWithHoleNaN(
578 : PretenureFlag pretenure = NOT_TENURED);
579 :
580 : // Allocates a new BigInt with {length} digits. Only to be used by
581 : // MutableBigInt::New*.
582 : Handle<FreshlyAllocatedBigInt> NewBigInt(
583 : int length, PretenureFlag pretenure = NOT_TENURED);
584 :
585 : Handle<JSObject> NewArgumentsObject(Handle<JSFunction> callee, int length);
586 :
587 : // Allocates and initializes a new JavaScript object based on a
588 : // constructor.
589 : // JS objects are pretenured when allocated by the bootstrapper and
590 : // runtime.
591 : Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
592 : PretenureFlag pretenure = NOT_TENURED);
593 : // JSObject without a prototype.
594 : Handle<JSObject> NewJSObjectWithNullProto(
595 : PretenureFlag pretenure = NOT_TENURED);
596 :
597 : // Global objects are pretenured and initialized based on a constructor.
598 : Handle<JSGlobalObject> NewJSGlobalObject(Handle<JSFunction> constructor);
599 :
600 : // Allocates and initializes a new JavaScript object based on a map.
601 : // Passing an allocation site means that a memento will be created that
602 : // points to the site.
603 : // JS objects are pretenured when allocated by the bootstrapper and
604 : // runtime.
605 : Handle<JSObject> NewJSObjectFromMap(
606 : Handle<Map> map, PretenureFlag pretenure = NOT_TENURED,
607 : Handle<AllocationSite> allocation_site = Handle<AllocationSite>::null());
608 : Handle<JSObject> NewSlowJSObjectFromMap(
609 : Handle<Map> map,
610 : int number_of_slow_properties = NameDictionary::kInitialCapacity,
611 : PretenureFlag pretenure = NOT_TENURED);
612 : // Allocates and initializes a new JavaScript object with the given
613 : // {prototype} and {properties}. The newly created object will be
614 : // in dictionary properties mode. The {elements} can either be the
615 : // empty fixed array, in which case the resulting object will have
616 : // fast elements, or a NumberDictionary, in which case the resulting
617 : // object will have dictionary elements.
618 : Handle<JSObject> NewSlowJSObjectWithPropertiesAndElements(
619 : Handle<Object> prototype, Handle<NameDictionary> properties,
620 : Handle<FixedArrayBase> elements, PretenureFlag pretenure = NOT_TENURED);
621 :
622 : // JS arrays are pretenured when allocated by the parser.
623 :
624 : // Create a JSArray with a specified length and elements initialized
625 : // according to the specified mode.
626 : Handle<JSArray> NewJSArray(
627 : ElementsKind elements_kind, int length, int capacity,
628 : ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS,
629 : PretenureFlag pretenure = NOT_TENURED);
630 :
631 1300449 : Handle<JSArray> NewJSArray(
632 : int capacity, ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
633 : PretenureFlag pretenure = NOT_TENURED) {
634 1300449 : if (capacity != 0) {
635 : elements_kind = GetHoleyElementsKind(elements_kind);
636 : }
637 : return NewJSArray(elements_kind, 0, capacity,
638 1300449 : INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE, pretenure);
639 : }
640 :
641 : // Create a JSArray with the given elements.
642 : Handle<JSArray> NewJSArrayWithElements(Handle<FixedArrayBase> elements,
643 : ElementsKind elements_kind, int length,
644 : PretenureFlag pretenure = NOT_TENURED);
645 :
646 : inline Handle<JSArray> NewJSArrayWithElements(
647 : Handle<FixedArrayBase> elements,
648 : ElementsKind elements_kind = TERMINAL_FAST_ELEMENTS_KIND,
649 : PretenureFlag pretenure = NOT_TENURED);
650 :
651 : void NewJSArrayStorage(
652 : Handle<JSArray> array, int length, int capacity,
653 : ArrayStorageAllocationMode mode = DONT_INITIALIZE_ARRAY_ELEMENTS);
654 :
655 : Handle<JSWeakMap> NewJSWeakMap();
656 :
657 : Handle<JSGeneratorObject> NewJSGeneratorObject(Handle<JSFunction> function);
658 :
659 : Handle<JSModuleNamespace> NewJSModuleNamespace();
660 :
661 : Handle<Module> NewModule(Handle<SharedFunctionInfo> code);
662 :
663 : Handle<JSArrayBuffer> NewJSArrayBuffer(SharedFlag shared,
664 : PretenureFlag pretenure = NOT_TENURED);
665 :
666 : static void TypeAndSizeForElementsKind(ElementsKind kind,
667 : ExternalArrayType* array_type,
668 : size_t* element_size);
669 :
670 : Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
671 : PretenureFlag pretenure = NOT_TENURED);
672 :
673 : Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind,
674 : PretenureFlag pretenure = NOT_TENURED);
675 :
676 : // Creates a new JSTypedArray with the specified buffer.
677 : Handle<JSTypedArray> NewJSTypedArray(ExternalArrayType type,
678 : Handle<JSArrayBuffer> buffer,
679 : size_t byte_offset, size_t length,
680 : PretenureFlag pretenure = NOT_TENURED);
681 :
682 : // Creates a new on-heap JSTypedArray.
683 : Handle<JSTypedArray> NewJSTypedArray(ElementsKind elements_kind,
684 : size_t number_of_elements,
685 : PretenureFlag pretenure = NOT_TENURED);
686 :
687 : Handle<JSDataView> NewJSDataView(Handle<JSArrayBuffer> buffer,
688 : size_t byte_offset, size_t byte_length);
689 :
690 : Handle<JSIteratorResult> NewJSIteratorResult(Handle<Object> value, bool done);
691 : Handle<JSAsyncFromSyncIterator> NewJSAsyncFromSyncIterator(
692 : Handle<JSReceiver> sync_iterator, Handle<Object> next);
693 :
694 : Handle<JSMap> NewJSMap();
695 : Handle<JSSet> NewJSSet();
696 :
697 : // Allocates a bound function.
698 : MaybeHandle<JSBoundFunction> NewJSBoundFunction(
699 : Handle<JSReceiver> target_function, Handle<Object> bound_this,
700 : Vector<Handle<Object>> bound_args);
701 :
702 : // Allocates a Harmony proxy.
703 : Handle<JSProxy> NewJSProxy(Handle<JSReceiver> target,
704 : Handle<JSReceiver> handler);
705 :
706 : // Reinitialize an JSGlobalProxy based on a constructor. The object
707 : // must have the same size as objects allocated using the
708 : // constructor. The object is reinitialized and behaves as an
709 : // object that has been freshly allocated using the constructor.
710 : void ReinitializeJSGlobalProxy(Handle<JSGlobalProxy> global,
711 : Handle<JSFunction> constructor);
712 :
713 : Handle<JSGlobalProxy> NewUninitializedJSGlobalProxy(int size);
714 :
715 : // Creates a new JSFunction according to the given args. This is the function
716 : // you'll probably want to use when creating a JSFunction from the runtime.
717 : Handle<JSFunction> NewFunction(const NewFunctionArgs& args);
718 :
719 : // For testing only. Creates a sloppy function without code.
720 : Handle<JSFunction> NewFunctionForTest(Handle<String> name);
721 :
722 : // Function creation from SharedFunctionInfo.
723 :
724 : Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
725 : Handle<Map> initial_map, Handle<SharedFunctionInfo> function_info,
726 : Handle<Context> context, Handle<FeedbackCell> feedback_cell,
727 : PretenureFlag pretenure = TENURED);
728 :
729 : Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
730 : Handle<SharedFunctionInfo> function_info, Handle<Context> context,
731 : Handle<FeedbackCell> feedback_cell, PretenureFlag pretenure = TENURED);
732 :
733 : Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
734 : Handle<Map> initial_map, Handle<SharedFunctionInfo> function_info,
735 : Handle<Context> context, PretenureFlag pretenure = TENURED);
736 :
737 : Handle<JSFunction> NewFunctionFromSharedFunctionInfo(
738 : Handle<SharedFunctionInfo> function_info, Handle<Context> context,
739 : PretenureFlag pretenure = TENURED);
740 :
741 : // The choke-point for JSFunction creation. Handles allocation and
742 : // initialization. All other utility methods call into this.
743 : Handle<JSFunction> NewFunction(Handle<Map> map,
744 : Handle<SharedFunctionInfo> info,
745 : Handle<Context> context,
746 : PretenureFlag pretenure = TENURED);
747 :
748 : // Create a serialized scope info.
749 : Handle<ScopeInfo> NewScopeInfo(int length);
750 :
751 : Handle<ModuleInfo> NewModuleInfo();
752 :
753 : Handle<PreparseData> NewPreparseData(int data_length, int children_length);
754 :
755 : Handle<UncompiledDataWithoutPreparseData>
756 : NewUncompiledDataWithoutPreparseData(Handle<String> inferred_name,
757 : int32_t start_position,
758 : int32_t end_position,
759 : int32_t function_literal_id);
760 :
761 : Handle<UncompiledDataWithPreparseData> NewUncompiledDataWithPreparseData(
762 : Handle<String> inferred_name, int32_t start_position,
763 : int32_t end_position, int32_t function_literal_id, Handle<PreparseData>);
764 :
765 : // Create an External object for V8's external API.
766 : Handle<JSObject> NewExternal(void* value);
767 :
768 : // Creates a new CodeDataContainer for a Code object.
769 : Handle<CodeDataContainer> NewCodeDataContainer(int flags);
770 :
771 : // Allocates a new code object (fully initialized). All header fields of the
772 : // returned object are immutable and the code object is write protected.
773 : // The reference to the Code object is stored in self_reference.
774 : // This allows generated code to reference its own Code object
775 : // by containing this handle.
776 : Handle<Code> NewCode(const CodeDesc& desc, Code::Kind kind,
777 : Handle<Object> self_reference,
778 : int32_t builtin_index = Builtins::kNoBuiltinId,
779 : MaybeHandle<ByteArray> maybe_source_position_table =
780 : MaybeHandle<ByteArray>(),
781 : MaybeHandle<DeoptimizationData> maybe_deopt_data =
782 : MaybeHandle<DeoptimizationData>(),
783 : Movability movability = kMovable,
784 : bool is_turbofanned = false, int stack_slots = 0,
785 : int safepoint_table_offset = 0,
786 : int handler_table_offset = 0);
787 :
788 : // Like NewCode, this function allocates a new code object (fully
789 : // initialized). It may return an empty handle if the allocation does not
790 : // succeed.
791 : V8_WARN_UNUSED_RESULT MaybeHandle<Code> TryNewCode(
792 : const CodeDesc& desc, Code::Kind kind, Handle<Object> self_reference,
793 : int32_t builtin_index = Builtins::kNoBuiltinId,
794 : MaybeHandle<ByteArray> maybe_source_position_table =
795 : MaybeHandle<ByteArray>(),
796 : MaybeHandle<DeoptimizationData> maybe_deopt_data =
797 : MaybeHandle<DeoptimizationData>(),
798 : Movability movability = kMovable, bool is_turbofanned = false,
799 : int stack_slots = 0, int safepoint_table_offset = 0,
800 : int handler_table_offset = 0);
801 :
802 : // Allocates a new code object and initializes it as the trampoline to the
803 : // given off-heap entry point.
804 : Handle<Code> NewOffHeapTrampolineFor(Handle<Code> code,
805 : Address off_heap_entry);
806 :
807 : Handle<Code> CopyCode(Handle<Code> code);
808 :
809 : Handle<BytecodeArray> CopyBytecodeArray(Handle<BytecodeArray>);
810 :
811 : // Interface for creating error objects.
812 : Handle<Object> NewError(Handle<JSFunction> constructor,
813 : Handle<String> message);
814 :
815 : Handle<Object> NewInvalidStringLengthError();
816 :
817 : inline Handle<Object> NewURIError();
818 :
819 : Handle<Object> NewError(Handle<JSFunction> constructor,
820 : MessageTemplate template_index,
821 : Handle<Object> arg0 = Handle<Object>(),
822 : Handle<Object> arg1 = Handle<Object>(),
823 : Handle<Object> arg2 = Handle<Object>());
824 :
825 : #define DECLARE_ERROR(NAME) \
826 : Handle<Object> New##NAME(MessageTemplate template_index, \
827 : Handle<Object> arg0 = Handle<Object>(), \
828 : Handle<Object> arg1 = Handle<Object>(), \
829 : Handle<Object> arg2 = Handle<Object>());
830 : DECLARE_ERROR(Error)
831 : DECLARE_ERROR(EvalError)
832 : DECLARE_ERROR(RangeError)
833 : DECLARE_ERROR(ReferenceError)
834 : DECLARE_ERROR(SyntaxError)
835 : DECLARE_ERROR(TypeError)
836 : DECLARE_ERROR(WasmCompileError)
837 : DECLARE_ERROR(WasmLinkError)
838 : DECLARE_ERROR(WasmRuntimeError)
839 : #undef DECLARE_ERROR
840 :
841 : Handle<String> NumberToString(Handle<Object> number, bool check_cache = true);
842 : Handle<String> NumberToString(Smi number, bool check_cache = true);
843 :
844 : inline Handle<String> Uint32ToString(uint32_t value, bool check_cache = true);
845 :
846 : #define ROOT_ACCESSOR(Type, name, CamelName) inline Handle<Type> name();
847 : ROOT_LIST(ROOT_ACCESSOR)
848 : #undef ROOT_ACCESSOR
849 :
850 : // Allocates a new SharedFunctionInfo object.
851 : Handle<SharedFunctionInfo> NewSharedFunctionInfoForApiFunction(
852 : MaybeHandle<String> maybe_name,
853 : Handle<FunctionTemplateInfo> function_template_info, FunctionKind kind);
854 :
855 : Handle<SharedFunctionInfo> NewSharedFunctionInfoForBuiltin(
856 : MaybeHandle<String> name, int builtin_index,
857 : FunctionKind kind = kNormalFunction);
858 :
859 : Handle<SharedFunctionInfo> NewSharedFunctionInfoForLiteral(
860 : FunctionLiteral* literal, Handle<Script> script, bool is_toplevel);
861 :
862 : static bool IsFunctionModeWithPrototype(FunctionMode function_mode) {
863 1554 : return (function_mode & kWithPrototypeBits) != 0;
864 : }
865 :
866 : static bool IsFunctionModeWithWritablePrototype(FunctionMode function_mode) {
867 888 : return (function_mode & kWithWritablePrototypeBit) != 0;
868 : }
869 :
870 : static bool IsFunctionModeWithName(FunctionMode function_mode) {
871 1554 : return (function_mode & kWithNameBit) != 0;
872 : }
873 :
874 : static bool IsFunctionModeWithHomeObject(FunctionMode function_mode) {
875 999 : return (function_mode & kWithHomeObjectBit) != 0;
876 : }
877 :
878 : Handle<Map> CreateSloppyFunctionMap(
879 : FunctionMode function_mode, MaybeHandle<JSFunction> maybe_empty_function);
880 :
881 : Handle<Map> CreateStrictFunctionMap(FunctionMode function_mode,
882 : Handle<JSFunction> empty_function);
883 :
884 : Handle<Map> CreateClassFunctionMap(Handle<JSFunction> empty_function);
885 :
886 : // Allocates a new JSMessageObject object.
887 : Handle<JSMessageObject> NewJSMessageObject(
888 : MessageTemplate message, Handle<Object> argument, int start_position,
889 : int end_position, Handle<Script> script, Handle<Object> stack_frames);
890 :
891 : Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared);
892 :
893 : Handle<CoverageInfo> NewCoverageInfo(const ZoneVector<SourceRange>& slots);
894 :
895 : // Return a map for given number of properties using the map cache in the
896 : // native context.
897 : Handle<Map> ObjectLiteralMapFromCache(Handle<NativeContext> native_context,
898 : int number_of_properties);
899 :
900 : Handle<LoadHandler> NewLoadHandler(int data_count);
901 : Handle<StoreHandler> NewStoreHandler(int data_count);
902 :
903 : Handle<RegExpMatchInfo> NewRegExpMatchInfo();
904 :
905 : // Creates a new FixedArray that holds the data associated with the
906 : // atom regexp and stores it in the regexp.
907 : void SetRegExpAtomData(Handle<JSRegExp> regexp, JSRegExp::Type type,
908 : Handle<String> source, JSRegExp::Flags flags,
909 : Handle<Object> match_pattern);
910 :
911 : // Creates a new FixedArray that holds the data associated with the
912 : // irregexp regexp and stores it in the regexp.
913 : void SetRegExpIrregexpData(Handle<JSRegExp> regexp, JSRegExp::Type type,
914 : Handle<String> source, JSRegExp::Flags flags,
915 : int capture_count);
916 :
917 : // Returns the value for a known global constant (a property of the global
918 : // object which is neither configurable nor writable) like 'undefined'.
919 : // Returns a null handle when the given name is unknown.
920 : Handle<Object> GlobalConstantFor(Handle<Name> name);
921 :
922 : // Converts the given boolean condition to JavaScript boolean value.
923 : Handle<Object> ToBoolean(bool value);
924 :
925 : // Converts the given ToPrimitive hint to it's string representation.
926 : Handle<String> ToPrimitiveHintString(ToPrimitiveHint hint);
927 :
928 : Handle<JSPromise> NewJSPromiseWithoutHook(
929 : PretenureFlag pretenure = NOT_TENURED);
930 : Handle<JSPromise> NewJSPromise(PretenureFlag pretenure = NOT_TENURED);
931 :
932 : Handle<CallHandlerInfo> NewCallHandlerInfo(bool has_no_side_effect = false);
933 :
934 : HeapObject NewForTest(Handle<Map> map, PretenureFlag pretenure) {
935 5 : return New(map, pretenure);
936 : }
937 :
938 : private:
939 : Isolate* isolate() {
940 : // Downcast to the privately inherited sub-class using c-style casts to
941 : // avoid undefined behavior (as static_cast cannot cast across private
942 : // bases).
943 : // NOLINTNEXTLINE (google-readability-casting)
944 : return (Isolate*)this; // NOLINT(readability/casting)
945 : }
946 :
947 : HeapObject AllocateRawWithImmortalMap(
948 : int size, PretenureFlag pretenure, Map map,
949 : AllocationAlignment alignment = kWordAligned);
950 : HeapObject AllocateRawWithAllocationSite(
951 : Handle<Map> map, PretenureFlag pretenure,
952 : Handle<AllocationSite> allocation_site);
953 :
954 : // Allocate memory for an uninitialized array (e.g., a FixedArray or similar).
955 : HeapObject AllocateRawArray(int size, PretenureFlag pretenure);
956 : HeapObject AllocateRawFixedArray(int length, PretenureFlag pretenure);
957 : HeapObject AllocateRawWeakArrayList(int length, PretenureFlag pretenure);
958 : Handle<FixedArray> NewFixedArrayWithFiller(RootIndex map_root_index,
959 : int length, Object filler,
960 : PretenureFlag pretenure);
961 :
962 : // Allocates new context with given map, sets length and initializes the
963 : // after-header part with uninitialized values and leaves the context header
964 : // uninitialized.
965 : Handle<Context> NewContext(RootIndex map_root_index, int size,
966 : int variadic_part_length, PretenureFlag pretenure);
967 :
968 : template <typename T>
969 : Handle<T> AllocateSmallOrderedHashTable(Handle<Map> map, int capacity,
970 : PretenureFlag pretenure);
971 :
972 : // Creates a heap object based on the map. The fields of the heap object are
973 : // not initialized, it's the responsibility of the caller to do that.
974 : HeapObject New(Handle<Map> map, PretenureFlag pretenure);
975 :
976 : template <typename T>
977 : Handle<T> CopyArrayWithMap(Handle<T> src, Handle<Map> map);
978 : template <typename T>
979 : Handle<T> CopyArrayAndGrow(Handle<T> src, int grow_by,
980 : PretenureFlag pretenure);
981 :
982 : template <bool is_one_byte, typename T>
983 : Handle<String> AllocateInternalizedStringImpl(T t, int chars,
984 : uint32_t hash_field);
985 :
986 : Handle<SeqOneByteString> AllocateRawOneByteInternalizedString(
987 : int length, uint32_t hash_field);
988 :
989 : Handle<String> AllocateTwoByteInternalizedString(Vector<const uc16> str,
990 : uint32_t hash_field);
991 :
992 : MaybeHandle<String> NewStringFromTwoByte(const uc16* string, int length,
993 : PretenureFlag pretenure);
994 :
995 : // Attempt to find the number in a small cache. If we finds it, return
996 : // the string representation of the number. Otherwise return undefined.
997 : Handle<Object> NumberToStringCacheGet(Object number, int hash);
998 :
999 : // Update the cache with a new number-string pair.
1000 : Handle<String> NumberToStringCacheSet(Handle<Object> number, int hash,
1001 : const char* string, bool check_cache);
1002 :
1003 : // Create a JSArray with no elements and no length.
1004 : Handle<JSArray> NewJSArray(ElementsKind elements_kind,
1005 : PretenureFlag pretenure = NOT_TENURED);
1006 :
1007 : Handle<SharedFunctionInfo> NewSharedFunctionInfo(
1008 : MaybeHandle<String> name, MaybeHandle<HeapObject> maybe_function_data,
1009 : int maybe_builtin_index, FunctionKind kind = kNormalFunction);
1010 :
1011 : void InitializeAllocationMemento(AllocationMemento memento,
1012 : AllocationSite allocation_site);
1013 :
1014 : // Initializes a JSObject based on its map.
1015 : void InitializeJSObjectFromMap(Handle<JSObject> obj,
1016 : Handle<Object> properties, Handle<Map> map);
1017 : // Initializes JSObject body starting at given offset.
1018 : void InitializeJSObjectBody(Handle<JSObject> obj, Handle<Map> map,
1019 : int start_offset);
1020 : };
1021 :
1022 : // Utility class to simplify argument handling around JSFunction creation.
1023 : class NewFunctionArgs final {
1024 : public:
1025 : static NewFunctionArgs ForWasm(
1026 : Handle<String> name,
1027 : Handle<WasmExportedFunctionData> exported_function_data, Handle<Map> map);
1028 : static NewFunctionArgs ForBuiltin(Handle<String> name, Handle<Map> map,
1029 : int builtin_id);
1030 : static NewFunctionArgs ForFunctionWithoutCode(Handle<String> name,
1031 : Handle<Map> map,
1032 : LanguageMode language_mode);
1033 : static NewFunctionArgs ForBuiltinWithPrototype(
1034 : Handle<String> name, Handle<Object> prototype, InstanceType type,
1035 : int instance_size, int inobject_properties, int builtin_id,
1036 : MutableMode prototype_mutability);
1037 : static NewFunctionArgs ForBuiltinWithoutPrototype(Handle<String> name,
1038 : int builtin_id,
1039 : LanguageMode language_mode);
1040 :
1041 : Handle<Map> GetMap(Isolate* isolate) const;
1042 :
1043 : private:
1044 2210973 : NewFunctionArgs() = default; // Use the static factory constructors.
1045 :
1046 : void SetShouldCreateAndSetInitialMap();
1047 : void SetShouldSetPrototype();
1048 : void SetShouldSetLanguageMode();
1049 :
1050 : // Sentinel value.
1051 : static const int kUninitialized = -1;
1052 :
1053 : Handle<String> name_;
1054 : MaybeHandle<Map> maybe_map_;
1055 : MaybeHandle<WasmExportedFunctionData> maybe_exported_function_data_;
1056 :
1057 : bool should_create_and_set_initial_map_ = false;
1058 : InstanceType type_;
1059 : int instance_size_ = kUninitialized;
1060 : int inobject_properties_ = kUninitialized;
1061 :
1062 : bool should_set_prototype_ = false;
1063 : MaybeHandle<Object> maybe_prototype_;
1064 :
1065 : bool should_set_language_mode_ = false;
1066 : LanguageMode language_mode_;
1067 :
1068 : int maybe_builtin_id_ = kUninitialized;
1069 :
1070 : MutableMode prototype_mutability_;
1071 :
1072 : friend class Factory;
1073 : };
1074 :
1075 : } // namespace internal
1076 : } // namespace v8
1077 :
1078 : #endif // V8_HEAP_FACTORY_H_
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