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      1 // Copyright 2013 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 #include "v8.h"
     29 
     30 #include "api.h"
     31 #include "debug.h"
     32 #include "execution.h"
     33 #include "factory.h"
     34 #include "isolate-inl.h"
     35 #include "macro-assembler.h"
     36 #include "objects.h"
     37 #include "objects-visiting.h"
     38 #include "platform.h"
     39 #include "scopeinfo.h"
     40 
     41 namespace v8 {
     42 namespace internal {
     43 
     44 
     45 Handle<Box> Factory::NewBox(Handle<Object> value, PretenureFlag pretenure) {
     46   CALL_HEAP_FUNCTION(
     47       isolate(),
     48       isolate()->heap()->AllocateBox(*value, pretenure),
     49       Box);
     50 }
     51 
     52 
     53 Handle<FixedArray> Factory::NewFixedArray(int size, PretenureFlag pretenure) {
     54   ASSERT(0 <= size);
     55   CALL_HEAP_FUNCTION(
     56       isolate(),
     57       isolate()->heap()->AllocateFixedArray(size, pretenure),
     58       FixedArray);
     59 }
     60 
     61 
     62 Handle<FixedArray> Factory::NewFixedArrayWithHoles(int size,
     63                                                    PretenureFlag pretenure) {
     64   ASSERT(0 <= size);
     65   CALL_HEAP_FUNCTION(
     66       isolate(),
     67       isolate()->heap()->AllocateFixedArrayWithHoles(size, pretenure),
     68       FixedArray);
     69 }
     70 
     71 
     72 Handle<FixedDoubleArray> Factory::NewFixedDoubleArray(int size,
     73                                                       PretenureFlag pretenure) {
     74   ASSERT(0 <= size);
     75   CALL_HEAP_FUNCTION(
     76       isolate(),
     77       isolate()->heap()->AllocateUninitializedFixedDoubleArray(size, pretenure),
     78       FixedDoubleArray);
     79 }
     80 
     81 
     82 Handle<ConstantPoolArray> Factory::NewConstantPoolArray(
     83     int number_of_int64_entries,
     84     int number_of_ptr_entries,
     85     int number_of_int32_entries) {
     86   ASSERT(number_of_int64_entries > 0 || number_of_ptr_entries > 0 ||
     87          number_of_int32_entries > 0);
     88   CALL_HEAP_FUNCTION(
     89       isolate(),
     90       isolate()->heap()->AllocateConstantPoolArray(number_of_int64_entries,
     91                                                    number_of_ptr_entries,
     92                                                    number_of_int32_entries),
     93       ConstantPoolArray);
     94 }
     95 
     96 
     97 Handle<NameDictionary> Factory::NewNameDictionary(int at_least_space_for) {
     98   ASSERT(0 <= at_least_space_for);
     99   CALL_HEAP_FUNCTION(isolate(),
    100                      NameDictionary::Allocate(isolate()->heap(),
    101                                               at_least_space_for),
    102                      NameDictionary);
    103 }
    104 
    105 
    106 Handle<SeededNumberDictionary> Factory::NewSeededNumberDictionary(
    107     int at_least_space_for) {
    108   ASSERT(0 <= at_least_space_for);
    109   CALL_HEAP_FUNCTION(isolate(),
    110                      SeededNumberDictionary::Allocate(isolate()->heap(),
    111                                                       at_least_space_for),
    112                      SeededNumberDictionary);
    113 }
    114 
    115 
    116 Handle<UnseededNumberDictionary> Factory::NewUnseededNumberDictionary(
    117     int at_least_space_for) {
    118   ASSERT(0 <= at_least_space_for);
    119   CALL_HEAP_FUNCTION(isolate(),
    120                      UnseededNumberDictionary::Allocate(isolate()->heap(),
    121                                                         at_least_space_for),
    122                      UnseededNumberDictionary);
    123 }
    124 
    125 
    126 Handle<ObjectHashSet> Factory::NewObjectHashSet(int at_least_space_for) {
    127   ASSERT(0 <= at_least_space_for);
    128   CALL_HEAP_FUNCTION(isolate(),
    129                      ObjectHashSet::Allocate(isolate()->heap(),
    130                                              at_least_space_for),
    131                      ObjectHashSet);
    132 }
    133 
    134 
    135 Handle<ObjectHashTable> Factory::NewObjectHashTable(
    136     int at_least_space_for,
    137     MinimumCapacity capacity_option) {
    138   ASSERT(0 <= at_least_space_for);
    139   CALL_HEAP_FUNCTION(isolate(),
    140                      ObjectHashTable::Allocate(isolate()->heap(),
    141                                                at_least_space_for,
    142                                                capacity_option),
    143                      ObjectHashTable);
    144 }
    145 
    146 
    147 Handle<WeakHashTable> Factory::NewWeakHashTable(int at_least_space_for) {
    148   ASSERT(0 <= at_least_space_for);
    149   CALL_HEAP_FUNCTION(
    150       isolate(),
    151       WeakHashTable::Allocate(isolate()->heap(),
    152                               at_least_space_for,
    153                               USE_DEFAULT_MINIMUM_CAPACITY,
    154                               TENURED),
    155       WeakHashTable);
    156 }
    157 
    158 
    159 Handle<DescriptorArray> Factory::NewDescriptorArray(int number_of_descriptors,
    160                                                     int slack) {
    161   ASSERT(0 <= number_of_descriptors);
    162   CALL_HEAP_FUNCTION(isolate(),
    163                      DescriptorArray::Allocate(
    164                          isolate(), number_of_descriptors, slack),
    165                      DescriptorArray);
    166 }
    167 
    168 
    169 Handle<DeoptimizationInputData> Factory::NewDeoptimizationInputData(
    170     int deopt_entry_count,
    171     PretenureFlag pretenure) {
    172   ASSERT(deopt_entry_count > 0);
    173   CALL_HEAP_FUNCTION(isolate(),
    174                      DeoptimizationInputData::Allocate(isolate(),
    175                                                        deopt_entry_count,
    176                                                        pretenure),
    177                      DeoptimizationInputData);
    178 }
    179 
    180 
    181 Handle<DeoptimizationOutputData> Factory::NewDeoptimizationOutputData(
    182     int deopt_entry_count,
    183     PretenureFlag pretenure) {
    184   ASSERT(deopt_entry_count > 0);
    185   CALL_HEAP_FUNCTION(isolate(),
    186                      DeoptimizationOutputData::Allocate(isolate(),
    187                                                         deopt_entry_count,
    188                                                         pretenure),
    189                      DeoptimizationOutputData);
    190 }
    191 
    192 
    193 Handle<AccessorPair> Factory::NewAccessorPair() {
    194   CALL_HEAP_FUNCTION(isolate(),
    195                      isolate()->heap()->AllocateAccessorPair(),
    196                      AccessorPair);
    197 }
    198 
    199 
    200 Handle<TypeFeedbackInfo> Factory::NewTypeFeedbackInfo() {
    201   CALL_HEAP_FUNCTION(isolate(),
    202                      isolate()->heap()->AllocateTypeFeedbackInfo(),
    203                      TypeFeedbackInfo);
    204 }
    205 
    206 
    207 // Internalized strings are created in the old generation (data space).
    208 Handle<String> Factory::InternalizeUtf8String(Vector<const char> string) {
    209   CALL_HEAP_FUNCTION(isolate(),
    210                      isolate()->heap()->InternalizeUtf8String(string),
    211                      String);
    212 }
    213 
    214 
    215 // Internalized strings are created in the old generation (data space).
    216 Handle<String> Factory::InternalizeString(Handle<String> string) {
    217   CALL_HEAP_FUNCTION(isolate(),
    218                      isolate()->heap()->InternalizeString(*string),
    219                      String);
    220 }
    221 
    222 
    223 Handle<String> Factory::InternalizeOneByteString(Vector<const uint8_t> string) {
    224   CALL_HEAP_FUNCTION(isolate(),
    225                      isolate()->heap()->InternalizeOneByteString(string),
    226                      String);
    227 }
    228 
    229 
    230 Handle<String> Factory::InternalizeOneByteString(
    231     Handle<SeqOneByteString> string, int from, int length) {
    232   CALL_HEAP_FUNCTION(isolate(),
    233                      isolate()->heap()->InternalizeOneByteString(
    234                          string, from, length),
    235                      String);
    236 }
    237 
    238 
    239 Handle<String> Factory::InternalizeTwoByteString(Vector<const uc16> string) {
    240   CALL_HEAP_FUNCTION(isolate(),
    241                      isolate()->heap()->InternalizeTwoByteString(string),
    242                      String);
    243 }
    244 
    245 
    246 Handle<String> Factory::NewStringFromOneByte(Vector<const uint8_t> string,
    247                                              PretenureFlag pretenure) {
    248   CALL_HEAP_FUNCTION(
    249       isolate(),
    250       isolate()->heap()->AllocateStringFromOneByte(string, pretenure),
    251       String);
    252 }
    253 
    254 Handle<String> Factory::NewStringFromUtf8(Vector<const char> string,
    255                                           PretenureFlag pretenure) {
    256   CALL_HEAP_FUNCTION(
    257       isolate(),
    258       isolate()->heap()->AllocateStringFromUtf8(string, pretenure),
    259       String);
    260 }
    261 
    262 
    263 Handle<String> Factory::NewStringFromTwoByte(Vector<const uc16> string,
    264                                              PretenureFlag pretenure) {
    265   CALL_HEAP_FUNCTION(
    266       isolate(),
    267       isolate()->heap()->AllocateStringFromTwoByte(string, pretenure),
    268       String);
    269 }
    270 
    271 
    272 Handle<SeqOneByteString> Factory::NewRawOneByteString(int length,
    273                                                   PretenureFlag pretenure) {
    274   CALL_HEAP_FUNCTION(
    275       isolate(),
    276       isolate()->heap()->AllocateRawOneByteString(length, pretenure),
    277       SeqOneByteString);
    278 }
    279 
    280 
    281 Handle<SeqTwoByteString> Factory::NewRawTwoByteString(int length,
    282                                                       PretenureFlag pretenure) {
    283   CALL_HEAP_FUNCTION(
    284       isolate(),
    285       isolate()->heap()->AllocateRawTwoByteString(length, pretenure),
    286       SeqTwoByteString);
    287 }
    288 
    289 
    290 Handle<String> Factory::NewConsString(Handle<String> first,
    291                                       Handle<String> second) {
    292   CALL_HEAP_FUNCTION(isolate(),
    293                      isolate()->heap()->AllocateConsString(*first, *second),
    294                      String);
    295 }
    296 
    297 
    298 template<typename SinkChar, typename StringType>
    299 Handle<String> ConcatStringContent(Handle<StringType> result,
    300                                    Handle<String> first,
    301                                    Handle<String> second) {
    302   DisallowHeapAllocation pointer_stays_valid;
    303   SinkChar* sink = result->GetChars();
    304   String::WriteToFlat(*first, sink, 0, first->length());
    305   String::WriteToFlat(*second, sink + first->length(), 0, second->length());
    306   return result;
    307 }
    308 
    309 
    310 Handle<String> Factory::NewFlatConcatString(Handle<String> first,
    311                                             Handle<String> second) {
    312   int total_length = first->length() + second->length();
    313   if (first->IsOneByteRepresentation() && second->IsOneByteRepresentation()) {
    314     return ConcatStringContent<uint8_t>(
    315         NewRawOneByteString(total_length), first, second);
    316   } else {
    317     return ConcatStringContent<uc16>(
    318         NewRawTwoByteString(total_length), first, second);
    319   }
    320 }
    321 
    322 
    323 Handle<String> Factory::NewSubString(Handle<String> str,
    324                                      int begin,
    325                                      int end) {
    326   CALL_HEAP_FUNCTION(isolate(),
    327                      str->SubString(begin, end),
    328                      String);
    329 }
    330 
    331 
    332 Handle<String> Factory::NewProperSubString(Handle<String> str,
    333                                            int begin,
    334                                            int end) {
    335   ASSERT(begin > 0 || end < str->length());
    336   CALL_HEAP_FUNCTION(isolate(),
    337                      isolate()->heap()->AllocateSubString(*str, begin, end),
    338                      String);
    339 }
    340 
    341 
    342 Handle<String> Factory::NewExternalStringFromAscii(
    343     const ExternalAsciiString::Resource* resource) {
    344   CALL_HEAP_FUNCTION(
    345       isolate(),
    346       isolate()->heap()->AllocateExternalStringFromAscii(resource),
    347       String);
    348 }
    349 
    350 
    351 Handle<String> Factory::NewExternalStringFromTwoByte(
    352     const ExternalTwoByteString::Resource* resource) {
    353   CALL_HEAP_FUNCTION(
    354       isolate(),
    355       isolate()->heap()->AllocateExternalStringFromTwoByte(resource),
    356       String);
    357 }
    358 
    359 
    360 Handle<Symbol> Factory::NewSymbol() {
    361   CALL_HEAP_FUNCTION(
    362       isolate(),
    363       isolate()->heap()->AllocateSymbol(),
    364       Symbol);
    365 }
    366 
    367 
    368 Handle<Symbol> Factory::NewPrivateSymbol() {
    369   CALL_HEAP_FUNCTION(
    370       isolate(),
    371       isolate()->heap()->AllocatePrivateSymbol(),
    372       Symbol);
    373 }
    374 
    375 
    376 Handle<Context> Factory::NewNativeContext() {
    377   CALL_HEAP_FUNCTION(
    378       isolate(),
    379       isolate()->heap()->AllocateNativeContext(),
    380       Context);
    381 }
    382 
    383 
    384 Handle<Context> Factory::NewGlobalContext(Handle<JSFunction> function,
    385                                           Handle<ScopeInfo> scope_info) {
    386   CALL_HEAP_FUNCTION(
    387       isolate(),
    388       isolate()->heap()->AllocateGlobalContext(*function, *scope_info),
    389       Context);
    390 }
    391 
    392 
    393 Handle<Context> Factory::NewModuleContext(Handle<ScopeInfo> scope_info) {
    394   CALL_HEAP_FUNCTION(
    395       isolate(),
    396       isolate()->heap()->AllocateModuleContext(*scope_info),
    397       Context);
    398 }
    399 
    400 
    401 Handle<Context> Factory::NewFunctionContext(int length,
    402                                             Handle<JSFunction> function) {
    403   CALL_HEAP_FUNCTION(
    404       isolate(),
    405       isolate()->heap()->AllocateFunctionContext(length, *function),
    406       Context);
    407 }
    408 
    409 
    410 Handle<Context> Factory::NewCatchContext(Handle<JSFunction> function,
    411                                          Handle<Context> previous,
    412                                          Handle<String> name,
    413                                          Handle<Object> thrown_object) {
    414   CALL_HEAP_FUNCTION(
    415       isolate(),
    416       isolate()->heap()->AllocateCatchContext(*function,
    417                                               *previous,
    418                                               *name,
    419                                               *thrown_object),
    420       Context);
    421 }
    422 
    423 
    424 Handle<Context> Factory::NewWithContext(Handle<JSFunction> function,
    425                                         Handle<Context> previous,
    426                                         Handle<JSObject> extension) {
    427   CALL_HEAP_FUNCTION(
    428       isolate(),
    429       isolate()->heap()->AllocateWithContext(*function, *previous, *extension),
    430       Context);
    431 }
    432 
    433 
    434 Handle<Context> Factory::NewBlockContext(Handle<JSFunction> function,
    435                                          Handle<Context> previous,
    436                                          Handle<ScopeInfo> scope_info) {
    437   CALL_HEAP_FUNCTION(
    438       isolate(),
    439       isolate()->heap()->AllocateBlockContext(*function,
    440                                               *previous,
    441                                               *scope_info),
    442       Context);
    443 }
    444 
    445 
    446 Handle<Struct> Factory::NewStruct(InstanceType type) {
    447   CALL_HEAP_FUNCTION(
    448       isolate(),
    449       isolate()->heap()->AllocateStruct(type),
    450       Struct);
    451 }
    452 
    453 
    454 Handle<AliasedArgumentsEntry> Factory::NewAliasedArgumentsEntry(
    455     int aliased_context_slot) {
    456   Handle<AliasedArgumentsEntry> entry = Handle<AliasedArgumentsEntry>::cast(
    457       NewStruct(ALIASED_ARGUMENTS_ENTRY_TYPE));
    458   entry->set_aliased_context_slot(aliased_context_slot);
    459   return entry;
    460 }
    461 
    462 
    463 Handle<DeclaredAccessorDescriptor> Factory::NewDeclaredAccessorDescriptor() {
    464   return Handle<DeclaredAccessorDescriptor>::cast(
    465       NewStruct(DECLARED_ACCESSOR_DESCRIPTOR_TYPE));
    466 }
    467 
    468 
    469 Handle<DeclaredAccessorInfo> Factory::NewDeclaredAccessorInfo() {
    470   Handle<DeclaredAccessorInfo> info =
    471       Handle<DeclaredAccessorInfo>::cast(
    472           NewStruct(DECLARED_ACCESSOR_INFO_TYPE));
    473   info->set_flag(0);  // Must clear the flag, it was initialized as undefined.
    474   return info;
    475 }
    476 
    477 
    478 Handle<ExecutableAccessorInfo> Factory::NewExecutableAccessorInfo() {
    479   Handle<ExecutableAccessorInfo> info =
    480       Handle<ExecutableAccessorInfo>::cast(
    481           NewStruct(EXECUTABLE_ACCESSOR_INFO_TYPE));
    482   info->set_flag(0);  // Must clear the flag, it was initialized as undefined.
    483   return info;
    484 }
    485 
    486 
    487 Handle<Script> Factory::NewScript(Handle<String> source) {
    488   // Generate id for this script.
    489   Heap* heap = isolate()->heap();
    490   int id = heap->last_script_id()->value() + 1;
    491   if (!Smi::IsValid(id) || id < 0) id = 1;
    492   heap->set_last_script_id(Smi::FromInt(id));
    493 
    494   // Create and initialize script object.
    495   Handle<Foreign> wrapper = NewForeign(0, TENURED);
    496   Handle<Script> script = Handle<Script>::cast(NewStruct(SCRIPT_TYPE));
    497   script->set_source(*source);
    498   script->set_name(heap->undefined_value());
    499   script->set_id(Smi::FromInt(id));
    500   script->set_line_offset(Smi::FromInt(0));
    501   script->set_column_offset(Smi::FromInt(0));
    502   script->set_data(heap->undefined_value());
    503   script->set_context_data(heap->undefined_value());
    504   script->set_type(Smi::FromInt(Script::TYPE_NORMAL));
    505   script->set_wrapper(*wrapper);
    506   script->set_line_ends(heap->undefined_value());
    507   script->set_eval_from_shared(heap->undefined_value());
    508   script->set_eval_from_instructions_offset(Smi::FromInt(0));
    509   script->set_flags(Smi::FromInt(0));
    510 
    511   return script;
    512 }
    513 
    514 
    515 Handle<Foreign> Factory::NewForeign(Address addr, PretenureFlag pretenure) {
    516   CALL_HEAP_FUNCTION(isolate(),
    517                      isolate()->heap()->AllocateForeign(addr, pretenure),
    518                      Foreign);
    519 }
    520 
    521 
    522 Handle<Foreign> Factory::NewForeign(const AccessorDescriptor* desc) {
    523   return NewForeign((Address) desc, TENURED);
    524 }
    525 
    526 
    527 Handle<ByteArray> Factory::NewByteArray(int length, PretenureFlag pretenure) {
    528   ASSERT(0 <= length);
    529   CALL_HEAP_FUNCTION(
    530       isolate(),
    531       isolate()->heap()->AllocateByteArray(length, pretenure),
    532       ByteArray);
    533 }
    534 
    535 
    536 Handle<ExternalArray> Factory::NewExternalArray(int length,
    537                                                 ExternalArrayType array_type,
    538                                                 void* external_pointer,
    539                                                 PretenureFlag pretenure) {
    540   ASSERT(0 <= length);
    541   CALL_HEAP_FUNCTION(
    542       isolate(),
    543       isolate()->heap()->AllocateExternalArray(length,
    544                                                array_type,
    545                                                external_pointer,
    546                                                pretenure),
    547       ExternalArray);
    548 }
    549 
    550 
    551 Handle<Cell> Factory::NewCell(Handle<Object> value) {
    552   AllowDeferredHandleDereference convert_to_cell;
    553   CALL_HEAP_FUNCTION(
    554       isolate(),
    555       isolate()->heap()->AllocateCell(*value),
    556       Cell);
    557 }
    558 
    559 
    560 Handle<PropertyCell> Factory::NewPropertyCellWithHole() {
    561   CALL_HEAP_FUNCTION(
    562       isolate(),
    563       isolate()->heap()->AllocatePropertyCell(),
    564       PropertyCell);
    565 }
    566 
    567 
    568 Handle<PropertyCell> Factory::NewPropertyCell(Handle<Object> value) {
    569   AllowDeferredHandleDereference convert_to_cell;
    570   Handle<PropertyCell> cell = NewPropertyCellWithHole();
    571   PropertyCell::SetValueInferType(cell, value);
    572   return cell;
    573 }
    574 
    575 
    576 Handle<AllocationSite> Factory::NewAllocationSite() {
    577   CALL_HEAP_FUNCTION(
    578       isolate(),
    579       isolate()->heap()->AllocateAllocationSite(),
    580       AllocationSite);
    581 }
    582 
    583 
    584 Handle<Map> Factory::NewMap(InstanceType type,
    585                             int instance_size,
    586                             ElementsKind elements_kind) {
    587   CALL_HEAP_FUNCTION(
    588       isolate(),
    589       isolate()->heap()->AllocateMap(type, instance_size, elements_kind),
    590       Map);
    591 }
    592 
    593 
    594 Handle<JSObject> Factory::NewFunctionPrototype(Handle<JSFunction> function) {
    595   // Make sure to use globals from the function's context, since the function
    596   // can be from a different context.
    597   Handle<Context> native_context(function->context()->native_context());
    598   Handle<Map> new_map;
    599   if (function->shared()->is_generator()) {
    600     // Generator prototypes can share maps since they don't have "constructor"
    601     // properties.
    602     new_map = handle(native_context->generator_object_prototype_map());
    603   } else {
    604     // Each function prototype gets a fresh map to avoid unwanted sharing of
    605     // maps between prototypes of different constructors.
    606     Handle<JSFunction> object_function(native_context->object_function());
    607     ASSERT(object_function->has_initial_map());
    608     new_map = Map::Copy(handle(object_function->initial_map()));
    609   }
    610 
    611   Handle<JSObject> prototype = NewJSObjectFromMap(new_map);
    612 
    613   if (!function->shared()->is_generator()) {
    614     JSObject::SetLocalPropertyIgnoreAttributes(prototype,
    615                                                constructor_string(),
    616                                                function,
    617                                                DONT_ENUM);
    618   }
    619 
    620   return prototype;
    621 }
    622 
    623 
    624 Handle<Map> Factory::CopyWithPreallocatedFieldDescriptors(Handle<Map> src) {
    625   CALL_HEAP_FUNCTION(
    626       isolate(), src->CopyWithPreallocatedFieldDescriptors(), Map);
    627 }
    628 
    629 
    630 Handle<Map> Factory::CopyMap(Handle<Map> src,
    631                              int extra_inobject_properties) {
    632   Handle<Map> copy = CopyWithPreallocatedFieldDescriptors(src);
    633   // Check that we do not overflow the instance size when adding the
    634   // extra inobject properties.
    635   int instance_size_delta = extra_inobject_properties * kPointerSize;
    636   int max_instance_size_delta =
    637       JSObject::kMaxInstanceSize - copy->instance_size();
    638   int max_extra_properties = max_instance_size_delta >> kPointerSizeLog2;
    639   if (extra_inobject_properties > max_extra_properties) {
    640     // If the instance size overflows, we allocate as many properties
    641     // as we can as inobject properties.
    642     instance_size_delta = max_instance_size_delta;
    643     extra_inobject_properties = max_extra_properties;
    644   }
    645   // Adjust the map with the extra inobject properties.
    646   int inobject_properties =
    647       copy->inobject_properties() + extra_inobject_properties;
    648   copy->set_inobject_properties(inobject_properties);
    649   copy->set_unused_property_fields(inobject_properties);
    650   copy->set_instance_size(copy->instance_size() + instance_size_delta);
    651   copy->set_visitor_id(StaticVisitorBase::GetVisitorId(*copy));
    652   return copy;
    653 }
    654 
    655 
    656 Handle<Map> Factory::CopyMap(Handle<Map> src) {
    657   CALL_HEAP_FUNCTION(isolate(), src->Copy(), Map);
    658 }
    659 
    660 
    661 Handle<Map> Factory::GetElementsTransitionMap(
    662     Handle<JSObject> src,
    663     ElementsKind elements_kind) {
    664   Isolate* i = isolate();
    665   CALL_HEAP_FUNCTION(i,
    666                      src->GetElementsTransitionMap(i, elements_kind),
    667                      Map);
    668 }
    669 
    670 
    671 Handle<FixedArray> Factory::CopyFixedArray(Handle<FixedArray> array) {
    672   CALL_HEAP_FUNCTION(isolate(), array->Copy(), FixedArray);
    673 }
    674 
    675 
    676 Handle<FixedArray> Factory::CopySizeFixedArray(Handle<FixedArray> array,
    677                                                int new_length,
    678                                                PretenureFlag pretenure) {
    679   CALL_HEAP_FUNCTION(isolate(),
    680                      array->CopySize(new_length, pretenure),
    681                      FixedArray);
    682 }
    683 
    684 
    685 Handle<FixedDoubleArray> Factory::CopyFixedDoubleArray(
    686     Handle<FixedDoubleArray> array) {
    687   CALL_HEAP_FUNCTION(isolate(), array->Copy(), FixedDoubleArray);
    688 }
    689 
    690 
    691 Handle<ConstantPoolArray> Factory::CopyConstantPoolArray(
    692     Handle<ConstantPoolArray> array) {
    693   CALL_HEAP_FUNCTION(isolate(), array->Copy(), ConstantPoolArray);
    694 }
    695 
    696 
    697 Handle<JSFunction> Factory::BaseNewFunctionFromSharedFunctionInfo(
    698     Handle<SharedFunctionInfo> function_info,
    699     Handle<Map> function_map,
    700     PretenureFlag pretenure) {
    701   CALL_HEAP_FUNCTION(
    702       isolate(),
    703       isolate()->heap()->AllocateFunction(*function_map,
    704                                           *function_info,
    705                                           isolate()->heap()->the_hole_value(),
    706                                           pretenure),
    707                      JSFunction);
    708 }
    709 
    710 
    711 static Handle<Map> MapForNewFunction(Isolate *isolate,
    712                                      Handle<SharedFunctionInfo> function_info) {
    713   Context *context = isolate->context()->native_context();
    714   int map_index = Context::FunctionMapIndex(function_info->language_mode(),
    715                                             function_info->is_generator());
    716   return Handle<Map>(Map::cast(context->get(map_index)));
    717 }
    718 
    719 
    720 Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
    721     Handle<SharedFunctionInfo> function_info,
    722     Handle<Context> context,
    723     PretenureFlag pretenure) {
    724   Handle<JSFunction> result = BaseNewFunctionFromSharedFunctionInfo(
    725       function_info,
    726       MapForNewFunction(isolate(), function_info),
    727       pretenure);
    728 
    729   if (function_info->ic_age() != isolate()->heap()->global_ic_age()) {
    730     function_info->ResetForNewContext(isolate()->heap()->global_ic_age());
    731   }
    732 
    733   result->set_context(*context);
    734 
    735   int index = function_info->SearchOptimizedCodeMap(context->native_context());
    736   if (!function_info->bound() && index < 0) {
    737     int number_of_literals = function_info->num_literals();
    738     Handle<FixedArray> literals = NewFixedArray(number_of_literals, pretenure);
    739     if (number_of_literals > 0) {
    740       // Store the native context in the literals array prefix. This
    741       // context will be used when creating object, regexp and array
    742       // literals in this function.
    743       literals->set(JSFunction::kLiteralNativeContextIndex,
    744                     context->native_context());
    745     }
    746     result->set_literals(*literals);
    747   }
    748 
    749   if (index > 0) {
    750     // Caching of optimized code enabled and optimized code found.
    751     function_info->InstallFromOptimizedCodeMap(*result, index);
    752     return result;
    753   }
    754 
    755   if (isolate()->use_crankshaft() &&
    756       FLAG_always_opt &&
    757       result->is_compiled() &&
    758       !function_info->is_toplevel() &&
    759       function_info->allows_lazy_compilation() &&
    760       !function_info->optimization_disabled() &&
    761       !isolate()->DebuggerHasBreakPoints()) {
    762     result->MarkForLazyRecompilation();
    763   }
    764   return result;
    765 }
    766 
    767 
    768 Handle<Object> Factory::NewNumber(double value,
    769                                   PretenureFlag pretenure) {
    770   CALL_HEAP_FUNCTION(
    771       isolate(),
    772       isolate()->heap()->NumberFromDouble(value, pretenure), Object);
    773 }
    774 
    775 
    776 Handle<Object> Factory::NewNumberFromInt(int32_t value,
    777                                          PretenureFlag pretenure) {
    778   CALL_HEAP_FUNCTION(
    779       isolate(),
    780       isolate()->heap()->NumberFromInt32(value, pretenure), Object);
    781 }
    782 
    783 
    784 Handle<Object> Factory::NewNumberFromUint(uint32_t value,
    785                                          PretenureFlag pretenure) {
    786   CALL_HEAP_FUNCTION(
    787       isolate(),
    788       isolate()->heap()->NumberFromUint32(value, pretenure), Object);
    789 }
    790 
    791 
    792 Handle<HeapNumber> Factory::NewHeapNumber(double value,
    793                                           PretenureFlag pretenure) {
    794   CALL_HEAP_FUNCTION(
    795       isolate(),
    796       isolate()->heap()->AllocateHeapNumber(value, pretenure), HeapNumber);
    797 }
    798 
    799 
    800 Handle<JSObject> Factory::NewNeanderObject() {
    801   CALL_HEAP_FUNCTION(
    802       isolate(),
    803       isolate()->heap()->AllocateJSObjectFromMap(
    804           isolate()->heap()->neander_map()),
    805       JSObject);
    806 }
    807 
    808 
    809 Handle<Object> Factory::NewTypeError(const char* message,
    810                                      Vector< Handle<Object> > args) {
    811   return NewError("MakeTypeError", message, args);
    812 }
    813 
    814 
    815 Handle<Object> Factory::NewTypeError(Handle<String> message) {
    816   return NewError("$TypeError", message);
    817 }
    818 
    819 
    820 Handle<Object> Factory::NewRangeError(const char* message,
    821                                       Vector< Handle<Object> > args) {
    822   return NewError("MakeRangeError", message, args);
    823 }
    824 
    825 
    826 Handle<Object> Factory::NewRangeError(Handle<String> message) {
    827   return NewError("$RangeError", message);
    828 }
    829 
    830 
    831 Handle<Object> Factory::NewSyntaxError(const char* message,
    832                                        Handle<JSArray> args) {
    833   return NewError("MakeSyntaxError", message, args);
    834 }
    835 
    836 
    837 Handle<Object> Factory::NewSyntaxError(Handle<String> message) {
    838   return NewError("$SyntaxError", message);
    839 }
    840 
    841 
    842 Handle<Object> Factory::NewReferenceError(const char* message,
    843                                           Vector< Handle<Object> > args) {
    844   return NewError("MakeReferenceError", message, args);
    845 }
    846 
    847 
    848 Handle<Object> Factory::NewReferenceError(Handle<String> message) {
    849   return NewError("$ReferenceError", message);
    850 }
    851 
    852 
    853 Handle<Object> Factory::NewError(const char* maker,
    854                                  const char* message,
    855                                  Vector< Handle<Object> > args) {
    856   // Instantiate a closeable HandleScope for EscapeFrom.
    857   v8::EscapableHandleScope scope(reinterpret_cast<v8::Isolate*>(isolate()));
    858   Handle<FixedArray> array = NewFixedArray(args.length());
    859   for (int i = 0; i < args.length(); i++) {
    860     array->set(i, *args[i]);
    861   }
    862   Handle<JSArray> object = NewJSArrayWithElements(array);
    863   Handle<Object> result = NewError(maker, message, object);
    864   return result.EscapeFrom(&scope);
    865 }
    866 
    867 
    868 Handle<Object> Factory::NewEvalError(const char* message,
    869                                      Vector< Handle<Object> > args) {
    870   return NewError("MakeEvalError", message, args);
    871 }
    872 
    873 
    874 Handle<Object> Factory::NewError(const char* message,
    875                                  Vector< Handle<Object> > args) {
    876   return NewError("MakeError", message, args);
    877 }
    878 
    879 
    880 Handle<String> Factory::EmergencyNewError(const char* message,
    881                                           Handle<JSArray> args) {
    882   const int kBufferSize = 1000;
    883   char buffer[kBufferSize];
    884   size_t space = kBufferSize;
    885   char* p = &buffer[0];
    886 
    887   Vector<char> v(buffer, kBufferSize);
    888   OS::StrNCpy(v, message, space);
    889   space -= Min(space, strlen(message));
    890   p = &buffer[kBufferSize] - space;
    891 
    892   for (unsigned i = 0; i < ARRAY_SIZE(args); i++) {
    893     if (space > 0) {
    894       *p++ = ' ';
    895       space--;
    896       if (space > 0) {
    897         MaybeObject* maybe_arg = args->GetElement(isolate(), i);
    898         Handle<String> arg_str(reinterpret_cast<String*>(maybe_arg));
    899         const char* arg = *arg_str->ToCString();
    900         Vector<char> v2(p, static_cast<int>(space));
    901         OS::StrNCpy(v2, arg, space);
    902         space -= Min(space, strlen(arg));
    903         p = &buffer[kBufferSize] - space;
    904       }
    905     }
    906   }
    907   if (space > 0) {
    908     *p = '\0';
    909   } else {
    910     buffer[kBufferSize - 1] = '\0';
    911   }
    912   Handle<String> error_string = NewStringFromUtf8(CStrVector(buffer), TENURED);
    913   return error_string;
    914 }
    915 
    916 
    917 Handle<Object> Factory::NewError(const char* maker,
    918                                  const char* message,
    919                                  Handle<JSArray> args) {
    920   Handle<String> make_str = InternalizeUtf8String(maker);
    921   Handle<Object> fun_obj(
    922       isolate()->js_builtins_object()->GetPropertyNoExceptionThrown(*make_str),
    923       isolate());
    924   // If the builtins haven't been properly configured yet this error
    925   // constructor may not have been defined.  Bail out.
    926   if (!fun_obj->IsJSFunction()) {
    927     return EmergencyNewError(message, args);
    928   }
    929   Handle<JSFunction> fun = Handle<JSFunction>::cast(fun_obj);
    930   Handle<Object> message_obj = InternalizeUtf8String(message);
    931   Handle<Object> argv[] = { message_obj, args };
    932 
    933   // Invoke the JavaScript factory method. If an exception is thrown while
    934   // running the factory method, use the exception as the result.
    935   bool caught_exception;
    936   Handle<Object> result = Execution::TryCall(fun,
    937                                              isolate()->js_builtins_object(),
    938                                              ARRAY_SIZE(argv),
    939                                              argv,
    940                                              &caught_exception);
    941   return result;
    942 }
    943 
    944 
    945 Handle<Object> Factory::NewError(Handle<String> message) {
    946   return NewError("$Error", message);
    947 }
    948 
    949 
    950 Handle<Object> Factory::NewError(const char* constructor,
    951                                  Handle<String> message) {
    952   Handle<String> constr = InternalizeUtf8String(constructor);
    953   Handle<JSFunction> fun = Handle<JSFunction>(
    954       JSFunction::cast(isolate()->js_builtins_object()->
    955                        GetPropertyNoExceptionThrown(*constr)));
    956   Handle<Object> argv[] = { message };
    957 
    958   // Invoke the JavaScript factory method. If an exception is thrown while
    959   // running the factory method, use the exception as the result.
    960   bool caught_exception;
    961   Handle<Object> result = Execution::TryCall(fun,
    962                                              isolate()->js_builtins_object(),
    963                                              ARRAY_SIZE(argv),
    964                                              argv,
    965                                              &caught_exception);
    966   return result;
    967 }
    968 
    969 
    970 Handle<JSFunction> Factory::NewFunction(Handle<String> name,
    971                                         InstanceType type,
    972                                         int instance_size,
    973                                         Handle<Code> code,
    974                                         bool force_initial_map) {
    975   // Allocate the function
    976   Handle<JSFunction> function = NewFunction(name, the_hole_value());
    977 
    978   // Set up the code pointer in both the shared function info and in
    979   // the function itself.
    980   function->shared()->set_code(*code);
    981   function->set_code(*code);
    982 
    983   if (force_initial_map ||
    984       type != JS_OBJECT_TYPE ||
    985       instance_size != JSObject::kHeaderSize) {
    986     Handle<Map> initial_map = NewMap(type, instance_size);
    987     Handle<JSObject> prototype = NewFunctionPrototype(function);
    988     initial_map->set_prototype(*prototype);
    989     function->set_initial_map(*initial_map);
    990     initial_map->set_constructor(*function);
    991   } else {
    992     ASSERT(!function->has_initial_map());
    993     ASSERT(!function->has_prototype());
    994   }
    995 
    996   return function;
    997 }
    998 
    999 
   1000 Handle<JSFunction> Factory::NewFunctionWithPrototype(Handle<String> name,
   1001                                                      InstanceType type,
   1002                                                      int instance_size,
   1003                                                      Handle<JSObject> prototype,
   1004                                                      Handle<Code> code,
   1005                                                      bool force_initial_map) {
   1006   // Allocate the function.
   1007   Handle<JSFunction> function = NewFunction(name, prototype);
   1008 
   1009   // Set up the code pointer in both the shared function info and in
   1010   // the function itself.
   1011   function->shared()->set_code(*code);
   1012   function->set_code(*code);
   1013 
   1014   if (force_initial_map ||
   1015       type != JS_OBJECT_TYPE ||
   1016       instance_size != JSObject::kHeaderSize) {
   1017     Handle<Map> initial_map = NewMap(type,
   1018                                      instance_size,
   1019                                      GetInitialFastElementsKind());
   1020     function->set_initial_map(*initial_map);
   1021     initial_map->set_constructor(*function);
   1022   }
   1023 
   1024   JSFunction::SetPrototype(function, prototype);
   1025   return function;
   1026 }
   1027 
   1028 
   1029 Handle<JSFunction> Factory::NewFunctionWithoutPrototype(Handle<String> name,
   1030                                                         Handle<Code> code) {
   1031   Handle<JSFunction> function = NewFunctionWithoutPrototype(name,
   1032                                                             CLASSIC_MODE);
   1033   function->shared()->set_code(*code);
   1034   function->set_code(*code);
   1035   ASSERT(!function->has_initial_map());
   1036   ASSERT(!function->has_prototype());
   1037   return function;
   1038 }
   1039 
   1040 
   1041 Handle<ScopeInfo> Factory::NewScopeInfo(int length) {
   1042   CALL_HEAP_FUNCTION(
   1043       isolate(),
   1044       isolate()->heap()->AllocateScopeInfo(length),
   1045       ScopeInfo);
   1046 }
   1047 
   1048 
   1049 Handle<JSObject> Factory::NewExternal(void* value) {
   1050   CALL_HEAP_FUNCTION(isolate(),
   1051                      isolate()->heap()->AllocateExternal(value),
   1052                      JSObject);
   1053 }
   1054 
   1055 
   1056 Handle<Code> Factory::NewCode(const CodeDesc& desc,
   1057                               Code::Flags flags,
   1058                               Handle<Object> self_ref,
   1059                               bool immovable,
   1060                               bool crankshafted,
   1061                               int prologue_offset) {
   1062   CALL_HEAP_FUNCTION(isolate(),
   1063                      isolate()->heap()->CreateCode(
   1064                          desc, flags, self_ref, immovable, crankshafted,
   1065                          prologue_offset),
   1066                      Code);
   1067 }
   1068 
   1069 
   1070 Handle<Code> Factory::CopyCode(Handle<Code> code) {
   1071   CALL_HEAP_FUNCTION(isolate(),
   1072                      isolate()->heap()->CopyCode(*code),
   1073                      Code);
   1074 }
   1075 
   1076 
   1077 Handle<Code> Factory::CopyCode(Handle<Code> code, Vector<byte> reloc_info) {
   1078   CALL_HEAP_FUNCTION(isolate(),
   1079                      isolate()->heap()->CopyCode(*code, reloc_info),
   1080                      Code);
   1081 }
   1082 
   1083 
   1084 Handle<String> Factory::InternalizedStringFromString(Handle<String> value) {
   1085   CALL_HEAP_FUNCTION(isolate(),
   1086                      isolate()->heap()->InternalizeString(*value), String);
   1087 }
   1088 
   1089 
   1090 Handle<JSObject> Factory::NewJSObject(Handle<JSFunction> constructor,
   1091                                       PretenureFlag pretenure) {
   1092   JSFunction::EnsureHasInitialMap(constructor);
   1093   CALL_HEAP_FUNCTION(
   1094       isolate(),
   1095       isolate()->heap()->AllocateJSObject(*constructor, pretenure), JSObject);
   1096 }
   1097 
   1098 
   1099 Handle<JSModule> Factory::NewJSModule(Handle<Context> context,
   1100                                       Handle<ScopeInfo> scope_info) {
   1101   CALL_HEAP_FUNCTION(
   1102       isolate(),
   1103       isolate()->heap()->AllocateJSModule(*context, *scope_info), JSModule);
   1104 }
   1105 
   1106 
   1107 // TODO(mstarzinger): Temporary wrapper until handlified.
   1108 static Handle<NameDictionary> NameDictionaryAdd(Handle<NameDictionary> dict,
   1109                                                 Handle<Name> name,
   1110                                                 Handle<Object> value,
   1111                                                 PropertyDetails details) {
   1112   CALL_HEAP_FUNCTION(dict->GetIsolate(),
   1113                      dict->Add(*name, *value, details),
   1114                      NameDictionary);
   1115 }
   1116 
   1117 
   1118 static Handle<GlobalObject> NewGlobalObjectFromMap(Isolate* isolate,
   1119                                                    Handle<Map> map) {
   1120   CALL_HEAP_FUNCTION(isolate,
   1121                      isolate->heap()->Allocate(*map, OLD_POINTER_SPACE),
   1122                      GlobalObject);
   1123 }
   1124 
   1125 
   1126 Handle<GlobalObject> Factory::NewGlobalObject(Handle<JSFunction> constructor) {
   1127   ASSERT(constructor->has_initial_map());
   1128   Handle<Map> map(constructor->initial_map());
   1129   ASSERT(map->is_dictionary_map());
   1130 
   1131   // Make sure no field properties are described in the initial map.
   1132   // This guarantees us that normalizing the properties does not
   1133   // require us to change property values to PropertyCells.
   1134   ASSERT(map->NextFreePropertyIndex() == 0);
   1135 
   1136   // Make sure we don't have a ton of pre-allocated slots in the
   1137   // global objects. They will be unused once we normalize the object.
   1138   ASSERT(map->unused_property_fields() == 0);
   1139   ASSERT(map->inobject_properties() == 0);
   1140 
   1141   // Initial size of the backing store to avoid resize of the storage during
   1142   // bootstrapping. The size differs between the JS global object ad the
   1143   // builtins object.
   1144   int initial_size = map->instance_type() == JS_GLOBAL_OBJECT_TYPE ? 64 : 512;
   1145 
   1146   // Allocate a dictionary object for backing storage.
   1147   int at_least_space_for = map->NumberOfOwnDescriptors() * 2 + initial_size;
   1148   Handle<NameDictionary> dictionary = NewNameDictionary(at_least_space_for);
   1149 
   1150   // The global object might be created from an object template with accessors.
   1151   // Fill these accessors into the dictionary.
   1152   Handle<DescriptorArray> descs(map->instance_descriptors());
   1153   for (int i = 0; i < map->NumberOfOwnDescriptors(); i++) {
   1154     PropertyDetails details = descs->GetDetails(i);
   1155     ASSERT(details.type() == CALLBACKS);  // Only accessors are expected.
   1156     PropertyDetails d = PropertyDetails(details.attributes(), CALLBACKS, i + 1);
   1157     Handle<Name> name(descs->GetKey(i));
   1158     Handle<Object> value(descs->GetCallbacksObject(i), isolate());
   1159     Handle<PropertyCell> cell = NewPropertyCell(value);
   1160     NameDictionaryAdd(dictionary, name, cell, d);
   1161   }
   1162 
   1163   // Allocate the global object and initialize it with the backing store.
   1164   Handle<GlobalObject> global = NewGlobalObjectFromMap(isolate(), map);
   1165   isolate()->heap()->InitializeJSObjectFromMap(*global, *dictionary, *map);
   1166 
   1167   // Create a new map for the global object.
   1168   Handle<Map> new_map = Map::CopyDropDescriptors(map);
   1169   new_map->set_dictionary_map(true);
   1170 
   1171   // Set up the global object as a normalized object.
   1172   global->set_map(*new_map);
   1173   global->set_properties(*dictionary);
   1174 
   1175   // Make sure result is a global object with properties in dictionary.
   1176   ASSERT(global->IsGlobalObject() && !global->HasFastProperties());
   1177   return global;
   1178 }
   1179 
   1180 
   1181 Handle<JSObject> Factory::NewJSObjectFromMap(Handle<Map> map,
   1182                                              PretenureFlag pretenure,
   1183                                              bool alloc_props) {
   1184   CALL_HEAP_FUNCTION(
   1185       isolate(),
   1186       isolate()->heap()->AllocateJSObjectFromMap(*map, pretenure, alloc_props),
   1187       JSObject);
   1188 }
   1189 
   1190 
   1191 Handle<JSArray> Factory::NewJSArray(int capacity,
   1192                                     ElementsKind elements_kind,
   1193                                     PretenureFlag pretenure) {
   1194   if (capacity != 0) {
   1195     elements_kind = GetHoleyElementsKind(elements_kind);
   1196   }
   1197   CALL_HEAP_FUNCTION(isolate(),
   1198                      isolate()->heap()->AllocateJSArrayAndStorage(
   1199                          elements_kind,
   1200                          0,
   1201                          capacity,
   1202                          INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE,
   1203                          pretenure),
   1204                      JSArray);
   1205 }
   1206 
   1207 
   1208 Handle<JSArray> Factory::NewJSArrayWithElements(Handle<FixedArrayBase> elements,
   1209                                                 ElementsKind elements_kind,
   1210                                                 PretenureFlag pretenure) {
   1211   CALL_HEAP_FUNCTION(
   1212       isolate(),
   1213       isolate()->heap()->AllocateJSArrayWithElements(*elements,
   1214                                                      elements_kind,
   1215                                                      elements->length(),
   1216                                                      pretenure),
   1217       JSArray);
   1218 }
   1219 
   1220 
   1221 void Factory::SetElementsCapacityAndLength(Handle<JSArray> array,
   1222                                            int capacity,
   1223                                            int length) {
   1224   ElementsAccessor* accessor = array->GetElementsAccessor();
   1225   CALL_HEAP_FUNCTION_VOID(
   1226       isolate(),
   1227       accessor->SetCapacityAndLength(*array, capacity, length));
   1228 }
   1229 
   1230 
   1231 void Factory::SetContent(Handle<JSArray> array,
   1232                          Handle<FixedArrayBase> elements) {
   1233   CALL_HEAP_FUNCTION_VOID(
   1234       isolate(),
   1235       array->SetContent(*elements));
   1236 }
   1237 
   1238 
   1239 Handle<JSGeneratorObject> Factory::NewJSGeneratorObject(
   1240     Handle<JSFunction> function) {
   1241   ASSERT(function->shared()->is_generator());
   1242   JSFunction::EnsureHasInitialMap(function);
   1243   Handle<Map> map(function->initial_map());
   1244   ASSERT(map->instance_type() == JS_GENERATOR_OBJECT_TYPE);
   1245   CALL_HEAP_FUNCTION(
   1246       isolate(),
   1247       isolate()->heap()->AllocateJSObjectFromMap(*map),
   1248       JSGeneratorObject);
   1249 }
   1250 
   1251 
   1252 Handle<JSArrayBuffer> Factory::NewJSArrayBuffer() {
   1253   Handle<JSFunction> array_buffer_fun(
   1254       isolate()->context()->native_context()->array_buffer_fun());
   1255   CALL_HEAP_FUNCTION(
   1256       isolate(),
   1257       isolate()->heap()->AllocateJSObject(*array_buffer_fun),
   1258       JSArrayBuffer);
   1259 }
   1260 
   1261 
   1262 Handle<JSDataView> Factory::NewJSDataView() {
   1263   Handle<JSFunction> data_view_fun(
   1264       isolate()->context()->native_context()->data_view_fun());
   1265   CALL_HEAP_FUNCTION(
   1266       isolate(),
   1267       isolate()->heap()->AllocateJSObject(*data_view_fun),
   1268       JSDataView);
   1269 }
   1270 
   1271 
   1272 static JSFunction* GetTypedArrayFun(ExternalArrayType type,
   1273                                     Isolate* isolate) {
   1274   Context* native_context = isolate->context()->native_context();
   1275   switch (type) {
   1276     case kExternalUnsignedByteArray:
   1277       return native_context->uint8_array_fun();
   1278 
   1279     case kExternalByteArray:
   1280       return native_context->int8_array_fun();
   1281 
   1282     case kExternalUnsignedShortArray:
   1283       return native_context->uint16_array_fun();
   1284 
   1285     case kExternalShortArray:
   1286       return native_context->int16_array_fun();
   1287 
   1288     case kExternalUnsignedIntArray:
   1289       return native_context->uint32_array_fun();
   1290 
   1291     case kExternalIntArray:
   1292       return native_context->int32_array_fun();
   1293 
   1294     case kExternalFloatArray:
   1295       return native_context->float_array_fun();
   1296 
   1297     case kExternalDoubleArray:
   1298       return native_context->double_array_fun();
   1299 
   1300     case kExternalPixelArray:
   1301       return native_context->uint8c_array_fun();
   1302 
   1303     default:
   1304       UNREACHABLE();
   1305       return NULL;
   1306   }
   1307 }
   1308 
   1309 
   1310 Handle<JSTypedArray> Factory::NewJSTypedArray(ExternalArrayType type) {
   1311   Handle<JSFunction> typed_array_fun_handle(GetTypedArrayFun(type, isolate()));
   1312 
   1313   CALL_HEAP_FUNCTION(
   1314       isolate(),
   1315       isolate()->heap()->AllocateJSObject(*typed_array_fun_handle),
   1316       JSTypedArray);
   1317 }
   1318 
   1319 
   1320 Handle<JSProxy> Factory::NewJSProxy(Handle<Object> handler,
   1321                                     Handle<Object> prototype) {
   1322   CALL_HEAP_FUNCTION(
   1323       isolate(),
   1324       isolate()->heap()->AllocateJSProxy(*handler, *prototype),
   1325       JSProxy);
   1326 }
   1327 
   1328 
   1329 void Factory::BecomeJSObject(Handle<JSReceiver> object) {
   1330   CALL_HEAP_FUNCTION_VOID(
   1331       isolate(),
   1332       isolate()->heap()->ReinitializeJSReceiver(
   1333           *object, JS_OBJECT_TYPE, JSObject::kHeaderSize));
   1334 }
   1335 
   1336 
   1337 void Factory::BecomeJSFunction(Handle<JSReceiver> object) {
   1338   CALL_HEAP_FUNCTION_VOID(
   1339       isolate(),
   1340       isolate()->heap()->ReinitializeJSReceiver(
   1341           *object, JS_FUNCTION_TYPE, JSFunction::kSize));
   1342 }
   1343 
   1344 
   1345 Handle<SharedFunctionInfo> Factory::NewSharedFunctionInfo(
   1346     Handle<String> name,
   1347     int number_of_literals,
   1348     bool is_generator,
   1349     Handle<Code> code,
   1350     Handle<ScopeInfo> scope_info) {
   1351   Handle<SharedFunctionInfo> shared = NewSharedFunctionInfo(name);
   1352   shared->set_code(*code);
   1353   shared->set_scope_info(*scope_info);
   1354   int literals_array_size = number_of_literals;
   1355   // If the function contains object, regexp or array literals,
   1356   // allocate extra space for a literals array prefix containing the
   1357   // context.
   1358   if (number_of_literals > 0) {
   1359     literals_array_size += JSFunction::kLiteralsPrefixSize;
   1360   }
   1361   shared->set_num_literals(literals_array_size);
   1362   if (is_generator) {
   1363     shared->set_instance_class_name(isolate()->heap()->Generator_string());
   1364     shared->DisableOptimization(kGenerator);
   1365   }
   1366   return shared;
   1367 }
   1368 
   1369 
   1370 Handle<JSMessageObject> Factory::NewJSMessageObject(
   1371     Handle<String> type,
   1372     Handle<JSArray> arguments,
   1373     int start_position,
   1374     int end_position,
   1375     Handle<Object> script,
   1376     Handle<Object> stack_trace,
   1377     Handle<Object> stack_frames) {
   1378   CALL_HEAP_FUNCTION(isolate(),
   1379                      isolate()->heap()->AllocateJSMessageObject(*type,
   1380                          *arguments,
   1381                          start_position,
   1382                          end_position,
   1383                          *script,
   1384                          *stack_trace,
   1385                          *stack_frames),
   1386                      JSMessageObject);
   1387 }
   1388 
   1389 
   1390 Handle<SharedFunctionInfo> Factory::NewSharedFunctionInfo(Handle<String> name) {
   1391   CALL_HEAP_FUNCTION(isolate(),
   1392                      isolate()->heap()->AllocateSharedFunctionInfo(*name),
   1393                      SharedFunctionInfo);
   1394 }
   1395 
   1396 
   1397 Handle<String> Factory::NumberToString(Handle<Object> number) {
   1398   CALL_HEAP_FUNCTION(isolate(),
   1399                      isolate()->heap()->NumberToString(*number), String);
   1400 }
   1401 
   1402 
   1403 Handle<String> Factory::Uint32ToString(uint32_t value) {
   1404   CALL_HEAP_FUNCTION(isolate(),
   1405                      isolate()->heap()->Uint32ToString(value), String);
   1406 }
   1407 
   1408 
   1409 Handle<SeededNumberDictionary> Factory::DictionaryAtNumberPut(
   1410     Handle<SeededNumberDictionary> dictionary,
   1411     uint32_t key,
   1412     Handle<Object> value) {
   1413   CALL_HEAP_FUNCTION(isolate(),
   1414                      dictionary->AtNumberPut(key, *value),
   1415                      SeededNumberDictionary);
   1416 }
   1417 
   1418 
   1419 Handle<UnseededNumberDictionary> Factory::DictionaryAtNumberPut(
   1420     Handle<UnseededNumberDictionary> dictionary,
   1421     uint32_t key,
   1422     Handle<Object> value) {
   1423   CALL_HEAP_FUNCTION(isolate(),
   1424                      dictionary->AtNumberPut(key, *value),
   1425                      UnseededNumberDictionary);
   1426 }
   1427 
   1428 
   1429 Handle<JSFunction> Factory::NewFunctionHelper(Handle<String> name,
   1430                                               Handle<Object> prototype) {
   1431   Handle<SharedFunctionInfo> function_share = NewSharedFunctionInfo(name);
   1432   CALL_HEAP_FUNCTION(
   1433       isolate(),
   1434       isolate()->heap()->AllocateFunction(*isolate()->function_map(),
   1435                                           *function_share,
   1436                                           *prototype),
   1437       JSFunction);
   1438 }
   1439 
   1440 
   1441 Handle<JSFunction> Factory::NewFunction(Handle<String> name,
   1442                                         Handle<Object> prototype) {
   1443   Handle<JSFunction> fun = NewFunctionHelper(name, prototype);
   1444   fun->set_context(isolate()->context()->native_context());
   1445   return fun;
   1446 }
   1447 
   1448 
   1449 Handle<JSFunction> Factory::NewFunctionWithoutPrototypeHelper(
   1450     Handle<String> name,
   1451     LanguageMode language_mode) {
   1452   Handle<SharedFunctionInfo> function_share = NewSharedFunctionInfo(name);
   1453   Handle<Map> map = (language_mode == CLASSIC_MODE)
   1454       ? isolate()->function_without_prototype_map()
   1455       : isolate()->strict_mode_function_without_prototype_map();
   1456   CALL_HEAP_FUNCTION(isolate(),
   1457                      isolate()->heap()->AllocateFunction(
   1458                          *map,
   1459                          *function_share,
   1460                          *the_hole_value()),
   1461                      JSFunction);
   1462 }
   1463 
   1464 
   1465 Handle<JSFunction> Factory::NewFunctionWithoutPrototype(
   1466     Handle<String> name,
   1467     LanguageMode language_mode) {
   1468   Handle<JSFunction> fun =
   1469       NewFunctionWithoutPrototypeHelper(name, language_mode);
   1470   fun->set_context(isolate()->context()->native_context());
   1471   return fun;
   1472 }
   1473 
   1474 
   1475 Handle<Object> Factory::ToObject(Handle<Object> object) {
   1476   CALL_HEAP_FUNCTION(isolate(), object->ToObject(isolate()), Object);
   1477 }
   1478 
   1479 
   1480 Handle<Object> Factory::ToObject(Handle<Object> object,
   1481                                  Handle<Context> native_context) {
   1482   CALL_HEAP_FUNCTION(isolate(), object->ToObject(*native_context), Object);
   1483 }
   1484 
   1485 
   1486 #ifdef ENABLE_DEBUGGER_SUPPORT
   1487 Handle<DebugInfo> Factory::NewDebugInfo(Handle<SharedFunctionInfo> shared) {
   1488   // Get the original code of the function.
   1489   Handle<Code> code(shared->code());
   1490 
   1491   // Create a copy of the code before allocating the debug info object to avoid
   1492   // allocation while setting up the debug info object.
   1493   Handle<Code> original_code(*Factory::CopyCode(code));
   1494 
   1495   // Allocate initial fixed array for active break points before allocating the
   1496   // debug info object to avoid allocation while setting up the debug info
   1497   // object.
   1498   Handle<FixedArray> break_points(
   1499       NewFixedArray(Debug::kEstimatedNofBreakPointsInFunction));
   1500 
   1501   // Create and set up the debug info object. Debug info contains function, a
   1502   // copy of the original code, the executing code and initial fixed array for
   1503   // active break points.
   1504   Handle<DebugInfo> debug_info =
   1505       Handle<DebugInfo>::cast(NewStruct(DEBUG_INFO_TYPE));
   1506   debug_info->set_shared(*shared);
   1507   debug_info->set_original_code(*original_code);
   1508   debug_info->set_code(*code);
   1509   debug_info->set_break_points(*break_points);
   1510 
   1511   // Link debug info to function.
   1512   shared->set_debug_info(*debug_info);
   1513 
   1514   return debug_info;
   1515 }
   1516 #endif
   1517 
   1518 
   1519 Handle<JSObject> Factory::NewArgumentsObject(Handle<Object> callee,
   1520                                              int length) {
   1521   CALL_HEAP_FUNCTION(
   1522       isolate(),
   1523       isolate()->heap()->AllocateArgumentsObject(*callee, length), JSObject);
   1524 }
   1525 
   1526 
   1527 Handle<JSFunction> Factory::CreateApiFunction(
   1528     Handle<FunctionTemplateInfo> obj, ApiInstanceType instance_type) {
   1529   Handle<Code> code = isolate()->builtins()->HandleApiCall();
   1530   Handle<Code> construct_stub = isolate()->builtins()->JSConstructStubApi();
   1531 
   1532   int internal_field_count = 0;
   1533   if (!obj->instance_template()->IsUndefined()) {
   1534     Handle<ObjectTemplateInfo> instance_template =
   1535         Handle<ObjectTemplateInfo>(
   1536             ObjectTemplateInfo::cast(obj->instance_template()));
   1537     internal_field_count =
   1538         Smi::cast(instance_template->internal_field_count())->value();
   1539   }
   1540 
   1541   // TODO(svenpanne) Kill ApiInstanceType and refactor things by generalizing
   1542   // JSObject::GetHeaderSize.
   1543   int instance_size = kPointerSize * internal_field_count;
   1544   InstanceType type;
   1545   switch (instance_type) {
   1546     case JavaScriptObject:
   1547       type = JS_OBJECT_TYPE;
   1548       instance_size += JSObject::kHeaderSize;
   1549       break;
   1550     case InnerGlobalObject:
   1551       type = JS_GLOBAL_OBJECT_TYPE;
   1552       instance_size += JSGlobalObject::kSize;
   1553       break;
   1554     case OuterGlobalObject:
   1555       type = JS_GLOBAL_PROXY_TYPE;
   1556       instance_size += JSGlobalProxy::kSize;
   1557       break;
   1558     default:
   1559       UNREACHABLE();
   1560       type = JS_OBJECT_TYPE;  // Keep the compiler happy.
   1561       break;
   1562   }
   1563 
   1564   Handle<JSFunction> result =
   1565       NewFunction(Factory::empty_string(),
   1566                   type,
   1567                   instance_size,
   1568                   code,
   1569                   true);
   1570 
   1571   // Set length.
   1572   result->shared()->set_length(obj->length());
   1573 
   1574   // Set class name.
   1575   Handle<Object> class_name = Handle<Object>(obj->class_name(), isolate());
   1576   if (class_name->IsString()) {
   1577     result->shared()->set_instance_class_name(*class_name);
   1578     result->shared()->set_name(*class_name);
   1579   }
   1580 
   1581   Handle<Map> map = Handle<Map>(result->initial_map());
   1582 
   1583   // Mark as undetectable if needed.
   1584   if (obj->undetectable()) {
   1585     map->set_is_undetectable();
   1586   }
   1587 
   1588   // Mark as hidden for the __proto__ accessor if needed.
   1589   if (obj->hidden_prototype()) {
   1590     map->set_is_hidden_prototype();
   1591   }
   1592 
   1593   // Mark as needs_access_check if needed.
   1594   if (obj->needs_access_check()) {
   1595     map->set_is_access_check_needed(true);
   1596   }
   1597 
   1598   // Set interceptor information in the map.
   1599   if (!obj->named_property_handler()->IsUndefined()) {
   1600     map->set_has_named_interceptor();
   1601   }
   1602   if (!obj->indexed_property_handler()->IsUndefined()) {
   1603     map->set_has_indexed_interceptor();
   1604   }
   1605 
   1606   // Set instance call-as-function information in the map.
   1607   if (!obj->instance_call_handler()->IsUndefined()) {
   1608     map->set_has_instance_call_handler();
   1609   }
   1610 
   1611   result->shared()->set_function_data(*obj);
   1612   result->shared()->set_construct_stub(*construct_stub);
   1613   result->shared()->DontAdaptArguments();
   1614 
   1615   // Recursively copy parent instance templates' accessors,
   1616   // 'data' may be modified.
   1617   int max_number_of_additional_properties = 0;
   1618   int max_number_of_static_properties = 0;
   1619   FunctionTemplateInfo* info = *obj;
   1620   while (true) {
   1621     if (!info->instance_template()->IsUndefined()) {
   1622       Object* props =
   1623           ObjectTemplateInfo::cast(
   1624               info->instance_template())->property_accessors();
   1625       if (!props->IsUndefined()) {
   1626         Handle<Object> props_handle(props, isolate());
   1627         NeanderArray props_array(props_handle);
   1628         max_number_of_additional_properties += props_array.length();
   1629       }
   1630     }
   1631     if (!info->property_accessors()->IsUndefined()) {
   1632       Object* props = info->property_accessors();
   1633       if (!props->IsUndefined()) {
   1634         Handle<Object> props_handle(props, isolate());
   1635         NeanderArray props_array(props_handle);
   1636         max_number_of_static_properties += props_array.length();
   1637       }
   1638     }
   1639     Object* parent = info->parent_template();
   1640     if (parent->IsUndefined()) break;
   1641     info = FunctionTemplateInfo::cast(parent);
   1642   }
   1643 
   1644   Map::EnsureDescriptorSlack(map, max_number_of_additional_properties);
   1645 
   1646   // Use a temporary FixedArray to acculumate static accessors
   1647   int valid_descriptors = 0;
   1648   Handle<FixedArray> array;
   1649   if (max_number_of_static_properties > 0) {
   1650     array = NewFixedArray(max_number_of_static_properties);
   1651   }
   1652 
   1653   while (true) {
   1654     // Install instance descriptors
   1655     if (!obj->instance_template()->IsUndefined()) {
   1656       Handle<ObjectTemplateInfo> instance =
   1657           Handle<ObjectTemplateInfo>(
   1658               ObjectTemplateInfo::cast(obj->instance_template()), isolate());
   1659       Handle<Object> props = Handle<Object>(instance->property_accessors(),
   1660                                             isolate());
   1661       if (!props->IsUndefined()) {
   1662         Map::AppendCallbackDescriptors(map, props);
   1663       }
   1664     }
   1665     // Accumulate static accessors
   1666     if (!obj->property_accessors()->IsUndefined()) {
   1667       Handle<Object> props = Handle<Object>(obj->property_accessors(),
   1668                                             isolate());
   1669       valid_descriptors =
   1670           AccessorInfo::AppendUnique(props, array, valid_descriptors);
   1671     }
   1672     // Climb parent chain
   1673     Handle<Object> parent = Handle<Object>(obj->parent_template(), isolate());
   1674     if (parent->IsUndefined()) break;
   1675     obj = Handle<FunctionTemplateInfo>::cast(parent);
   1676   }
   1677 
   1678   // Install accumulated static accessors
   1679   for (int i = 0; i < valid_descriptors; i++) {
   1680     Handle<AccessorInfo> accessor(AccessorInfo::cast(array->get(i)));
   1681     JSObject::SetAccessor(result, accessor);
   1682   }
   1683 
   1684   ASSERT(result->shared()->IsApiFunction());
   1685   return result;
   1686 }
   1687 
   1688 
   1689 Handle<MapCache> Factory::NewMapCache(int at_least_space_for) {
   1690   CALL_HEAP_FUNCTION(isolate(),
   1691                      MapCache::Allocate(isolate()->heap(),
   1692                                         at_least_space_for),
   1693                      MapCache);
   1694 }
   1695 
   1696 
   1697 MUST_USE_RESULT static MaybeObject* UpdateMapCacheWith(Context* context,
   1698                                                        FixedArray* keys,
   1699                                                        Map* map) {
   1700   Object* result;
   1701   { MaybeObject* maybe_result =
   1702         MapCache::cast(context->map_cache())->Put(keys, map);
   1703     if (!maybe_result->ToObject(&result)) return maybe_result;
   1704   }
   1705   context->set_map_cache(MapCache::cast(result));
   1706   return result;
   1707 }
   1708 
   1709 
   1710 Handle<MapCache> Factory::AddToMapCache(Handle<Context> context,
   1711                                         Handle<FixedArray> keys,
   1712                                         Handle<Map> map) {
   1713   CALL_HEAP_FUNCTION(isolate(),
   1714                      UpdateMapCacheWith(*context, *keys, *map), MapCache);
   1715 }
   1716 
   1717 
   1718 Handle<Map> Factory::ObjectLiteralMapFromCache(Handle<Context> context,
   1719                                                Handle<FixedArray> keys) {
   1720   if (context->map_cache()->IsUndefined()) {
   1721     // Allocate the new map cache for the native context.
   1722     Handle<MapCache> new_cache = NewMapCache(24);
   1723     context->set_map_cache(*new_cache);
   1724   }
   1725   // Check to see whether there is a matching element in the cache.
   1726   Handle<MapCache> cache =
   1727       Handle<MapCache>(MapCache::cast(context->map_cache()));
   1728   Handle<Object> result = Handle<Object>(cache->Lookup(*keys), isolate());
   1729   if (result->IsMap()) return Handle<Map>::cast(result);
   1730   // Create a new map and add it to the cache.
   1731   Handle<Map> map =
   1732       CopyMap(Handle<Map>(context->object_function()->initial_map()),
   1733               keys->length());
   1734   AddToMapCache(context, keys, map);
   1735   return Handle<Map>(map);
   1736 }
   1737 
   1738 
   1739 void Factory::SetRegExpAtomData(Handle<JSRegExp> regexp,
   1740                                 JSRegExp::Type type,
   1741                                 Handle<String> source,
   1742                                 JSRegExp::Flags flags,
   1743                                 Handle<Object> data) {
   1744   Handle<FixedArray> store = NewFixedArray(JSRegExp::kAtomDataSize);
   1745 
   1746   store->set(JSRegExp::kTagIndex, Smi::FromInt(type));
   1747   store->set(JSRegExp::kSourceIndex, *source);
   1748   store->set(JSRegExp::kFlagsIndex, Smi::FromInt(flags.value()));
   1749   store->set(JSRegExp::kAtomPatternIndex, *data);
   1750   regexp->set_data(*store);
   1751 }
   1752 
   1753 void Factory::SetRegExpIrregexpData(Handle<JSRegExp> regexp,
   1754                                     JSRegExp::Type type,
   1755                                     Handle<String> source,
   1756                                     JSRegExp::Flags flags,
   1757                                     int capture_count) {
   1758   Handle<FixedArray> store = NewFixedArray(JSRegExp::kIrregexpDataSize);
   1759   Smi* uninitialized = Smi::FromInt(JSRegExp::kUninitializedValue);
   1760   store->set(JSRegExp::kTagIndex, Smi::FromInt(type));
   1761   store->set(JSRegExp::kSourceIndex, *source);
   1762   store->set(JSRegExp::kFlagsIndex, Smi::FromInt(flags.value()));
   1763   store->set(JSRegExp::kIrregexpASCIICodeIndex, uninitialized);
   1764   store->set(JSRegExp::kIrregexpUC16CodeIndex, uninitialized);
   1765   store->set(JSRegExp::kIrregexpASCIICodeSavedIndex, uninitialized);
   1766   store->set(JSRegExp::kIrregexpUC16CodeSavedIndex, uninitialized);
   1767   store->set(JSRegExp::kIrregexpMaxRegisterCountIndex, Smi::FromInt(0));
   1768   store->set(JSRegExp::kIrregexpCaptureCountIndex,
   1769              Smi::FromInt(capture_count));
   1770   regexp->set_data(*store);
   1771 }
   1772 
   1773 
   1774 
   1775 void Factory::ConfigureInstance(Handle<FunctionTemplateInfo> desc,
   1776                                 Handle<JSObject> instance,
   1777                                 bool* pending_exception) {
   1778   // Configure the instance by adding the properties specified by the
   1779   // instance template.
   1780   Handle<Object> instance_template(desc->instance_template(), isolate());
   1781   if (!instance_template->IsUndefined()) {
   1782     Execution::ConfigureInstance(isolate(),
   1783                                  instance,
   1784                                  instance_template,
   1785                                  pending_exception);
   1786   } else {
   1787     *pending_exception = false;
   1788   }
   1789 }
   1790 
   1791 
   1792 Handle<Object> Factory::GlobalConstantFor(Handle<String> name) {
   1793   Heap* h = isolate()->heap();
   1794   if (name->Equals(h->undefined_string())) return undefined_value();
   1795   if (name->Equals(h->nan_string())) return nan_value();
   1796   if (name->Equals(h->infinity_string())) return infinity_value();
   1797   return Handle<Object>::null();
   1798 }
   1799 
   1800 
   1801 Handle<Object> Factory::ToBoolean(bool value) {
   1802   return value ? true_value() : false_value();
   1803 }
   1804 
   1805 
   1806 } }  // namespace v8::internal
   1807