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// Copyright 2012 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "v8.h"
#include "api.h"
#include "debug.h"
#include "execution.h"
#include "factory.h"
#include "macro-assembler.h"
#include "objects.h"
#include "objects-visiting.h"
#include "scopeinfo.h"
namespace v8 {
namespace internal {
Handle<FixedArray> Factory::NewFixedArray(int size, PretenureFlag pretenure) {
ASSERT(0 <= size);
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateFixedArray(size, pretenure),
FixedArray);
}
Handle<FixedArray> Factory::NewFixedArrayWithHoles(int size,
PretenureFlag pretenure) {
ASSERT(0 <= size);
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateFixedArrayWithHoles(size, pretenure),
FixedArray);
}
Handle<FixedDoubleArray> Factory::NewFixedDoubleArray(int size,
PretenureFlag pretenure) {
ASSERT(0 <= size);
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateUninitializedFixedDoubleArray(size, pretenure),
FixedDoubleArray);
}
Handle<StringDictionary> Factory::NewStringDictionary(int at_least_space_for) {
ASSERT(0 <= at_least_space_for);
CALL_HEAP_FUNCTION(isolate(),
StringDictionary::Allocate(at_least_space_for),
StringDictionary);
}
Handle<SeededNumberDictionary> Factory::NewSeededNumberDictionary(
int at_least_space_for) {
ASSERT(0 <= at_least_space_for);
CALL_HEAP_FUNCTION(isolate(),
SeededNumberDictionary::Allocate(at_least_space_for),
SeededNumberDictionary);
}
Handle<UnseededNumberDictionary> Factory::NewUnseededNumberDictionary(
int at_least_space_for) {
ASSERT(0 <= at_least_space_for);
CALL_HEAP_FUNCTION(isolate(),
UnseededNumberDictionary::Allocate(at_least_space_for),
UnseededNumberDictionary);
}
Handle<ObjectHashSet> Factory::NewObjectHashSet(int at_least_space_for) {
ASSERT(0 <= at_least_space_for);
CALL_HEAP_FUNCTION(isolate(),
ObjectHashSet::Allocate(at_least_space_for),
ObjectHashSet);
}
Handle<ObjectHashTable> Factory::NewObjectHashTable(int at_least_space_for) {
ASSERT(0 <= at_least_space_for);
CALL_HEAP_FUNCTION(isolate(),
ObjectHashTable::Allocate(at_least_space_for),
ObjectHashTable);
}
Handle<DescriptorArray> Factory::NewDescriptorArray(int number_of_descriptors) {
ASSERT(0 <= number_of_descriptors);
CALL_HEAP_FUNCTION(isolate(),
DescriptorArray::Allocate(number_of_descriptors),
DescriptorArray);
}
Handle<DeoptimizationInputData> Factory::NewDeoptimizationInputData(
int deopt_entry_count,
PretenureFlag pretenure) {
ASSERT(deopt_entry_count > 0);
CALL_HEAP_FUNCTION(isolate(),
DeoptimizationInputData::Allocate(deopt_entry_count,
pretenure),
DeoptimizationInputData);
}
Handle<DeoptimizationOutputData> Factory::NewDeoptimizationOutputData(
int deopt_entry_count,
PretenureFlag pretenure) {
ASSERT(deopt_entry_count > 0);
CALL_HEAP_FUNCTION(isolate(),
DeoptimizationOutputData::Allocate(deopt_entry_count,
pretenure),
DeoptimizationOutputData);
}
Handle<AccessorPair> Factory::NewAccessorPair() {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->AllocateAccessorPair(),
AccessorPair);
}
Handle<TypeFeedbackInfo> Factory::NewTypeFeedbackInfo() {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->AllocateTypeFeedbackInfo(),
TypeFeedbackInfo);
}
// Symbols are created in the old generation (data space).
Handle<String> Factory::LookupSymbol(Vector<const char> string) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->LookupSymbol(string),
String);
}
// Symbols are created in the old generation (data space).
Handle<String> Factory::LookupSymbol(Handle<String> string) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->LookupSymbol(*string),
String);
}
Handle<String> Factory::LookupAsciiSymbol(Vector<const char> string) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->LookupAsciiSymbol(string),
String);
}
Handle<String> Factory::LookupAsciiSymbol(Handle<SeqAsciiString> string,
int from,
int length) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->LookupAsciiSymbol(string,
from,
length),
String);
}
Handle<String> Factory::LookupTwoByteSymbol(Vector<const uc16> string) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->LookupTwoByteSymbol(string),
String);
}
Handle<String> Factory::NewStringFromAscii(Vector<const char> string,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateStringFromAscii(string, pretenure),
String);
}
Handle<String> Factory::NewStringFromUtf8(Vector<const char> string,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateStringFromUtf8(string, pretenure),
String);
}
Handle<String> Factory::NewStringFromTwoByte(Vector<const uc16> string,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateStringFromTwoByte(string, pretenure),
String);
}
Handle<SeqAsciiString> Factory::NewRawAsciiString(int length,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateRawAsciiString(length, pretenure),
SeqAsciiString);
}
Handle<SeqTwoByteString> Factory::NewRawTwoByteString(int length,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateRawTwoByteString(length, pretenure),
SeqTwoByteString);
}
Handle<String> Factory::NewConsString(Handle<String> first,
Handle<String> second) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->AllocateConsString(*first, *second),
String);
}
Handle<String> Factory::NewSubString(Handle<String> str,
int begin,
int end) {
CALL_HEAP_FUNCTION(isolate(),
str->SubString(begin, end),
String);
}
Handle<String> Factory::NewProperSubString(Handle<String> str,
int begin,
int end) {
ASSERT(begin > 0 || end < str->length());
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->AllocateSubString(*str, begin, end),
String);
}
Handle<String> Factory::NewExternalStringFromAscii(
const ExternalAsciiString::Resource* resource) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateExternalStringFromAscii(resource),
String);
}
Handle<String> Factory::NewExternalStringFromTwoByte(
const ExternalTwoByteString::Resource* resource) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateExternalStringFromTwoByte(resource),
String);
}
Handle<Context> Factory::NewGlobalContext() {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateGlobalContext(),
Context);
}
Handle<Context> Factory::NewFunctionContext(int length,
Handle<JSFunction> function) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateFunctionContext(length, *function),
Context);
}
Handle<Context> Factory::NewCatchContext(Handle<JSFunction> function,
Handle<Context> previous,
Handle<String> name,
Handle<Object> thrown_object) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateCatchContext(*function,
*previous,
*name,
*thrown_object),
Context);
}
Handle<Context> Factory::NewWithContext(Handle<JSFunction> function,
Handle<Context> previous,
Handle<JSObject> extension) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateWithContext(*function, *previous, *extension),
Context);
}
Handle<Context> Factory::NewBlockContext(
Handle<JSFunction> function,
Handle<Context> previous,
Handle<ScopeInfo> scope_info) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateBlockContext(*function,
*previous,
*scope_info),
Context);
}
Handle<Struct> Factory::NewStruct(InstanceType type) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateStruct(type),
Struct);
}
Handle<AccessorInfo> Factory::NewAccessorInfo() {
Handle<AccessorInfo> info =
Handle<AccessorInfo>::cast(NewStruct(ACCESSOR_INFO_TYPE));
info->set_flag(0); // Must clear the flag, it was initialized as undefined.
return info;
}
Handle<Script> Factory::NewScript(Handle<String> source) {
// Generate id for this script.
int id;
Heap* heap = isolate()->heap();
if (heap->last_script_id()->IsUndefined()) {
// Script ids start from one.
id = 1;
} else {
// Increment id, wrap when positive smi is exhausted.
id = Smi::cast(heap->last_script_id())->value();
id++;
if (!Smi::IsValid(id)) {
id = 0;
}
}
heap->SetLastScriptId(Smi::FromInt(id));
// Create and initialize script object.
Handle<Foreign> wrapper = NewForeign(0, TENURED);
Handle<Script> script = Handle<Script>::cast(NewStruct(SCRIPT_TYPE));
script->set_source(*source);
script->set_name(heap->undefined_value());
script->set_id(heap->last_script_id());
script->set_line_offset(Smi::FromInt(0));
script->set_column_offset(Smi::FromInt(0));
script->set_data(heap->undefined_value());
script->set_context_data(heap->undefined_value());
script->set_type(Smi::FromInt(Script::TYPE_NORMAL));
script->set_compilation_type(Smi::FromInt(Script::COMPILATION_TYPE_HOST));
script->set_compilation_state(
Smi::FromInt(Script::COMPILATION_STATE_INITIAL));
script->set_wrapper(*wrapper);
script->set_line_ends(heap->undefined_value());
script->set_eval_from_shared(heap->undefined_value());
script->set_eval_from_instructions_offset(Smi::FromInt(0));
return script;
}
Handle<Foreign> Factory::NewForeign(Address addr, PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->AllocateForeign(addr, pretenure),
Foreign);
}
Handle<Foreign> Factory::NewForeign(const AccessorDescriptor* desc) {
return NewForeign((Address) desc, TENURED);
}
Handle<ByteArray> Factory::NewByteArray(int length, PretenureFlag pretenure) {
ASSERT(0 <= length);
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateByteArray(length, pretenure),
ByteArray);
}
Handle<ExternalArray> Factory::NewExternalArray(int length,
ExternalArrayType array_type,
void* external_pointer,
PretenureFlag pretenure) {
ASSERT(0 <= length);
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateExternalArray(length,
array_type,
external_pointer,
pretenure),
ExternalArray);
}
Handle<JSGlobalPropertyCell> Factory::NewJSGlobalPropertyCell(
Handle<Object> value) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateJSGlobalPropertyCell(*value),
JSGlobalPropertyCell);
}
Handle<Map> Factory::NewMap(InstanceType type,
int instance_size,
ElementsKind elements_kind) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateMap(type, instance_size, elements_kind),
Map);
}
Handle<JSObject> Factory::NewFunctionPrototype(Handle<JSFunction> function) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateFunctionPrototype(*function),
JSObject);
}
Handle<Map> Factory::CopyMapDropDescriptors(Handle<Map> src) {
CALL_HEAP_FUNCTION(isolate(), src->CopyDropDescriptors(), Map);
}
Handle<Map> Factory::CopyMap(Handle<Map> src,
int extra_inobject_properties) {
Handle<Map> copy = CopyMapDropDescriptors(src);
// Check that we do not overflow the instance size when adding the
// extra inobject properties.
int instance_size_delta = extra_inobject_properties * kPointerSize;
int max_instance_size_delta =
JSObject::kMaxInstanceSize - copy->instance_size();
if (instance_size_delta > max_instance_size_delta) {
// If the instance size overflows, we allocate as many properties
// as we can as inobject properties.
instance_size_delta = max_instance_size_delta;
extra_inobject_properties = max_instance_size_delta >> kPointerSizeLog2;
}
// Adjust the map with the extra inobject properties.
int inobject_properties =
copy->inobject_properties() + extra_inobject_properties;
copy->set_inobject_properties(inobject_properties);
copy->set_unused_property_fields(inobject_properties);
copy->set_instance_size(copy->instance_size() + instance_size_delta);
copy->set_visitor_id(StaticVisitorBase::GetVisitorId(*copy));
return copy;
}
Handle<Map> Factory::CopyMapDropTransitions(Handle<Map> src) {
CALL_HEAP_FUNCTION(isolate(), src->CopyDropTransitions(), Map);
}
Handle<Map> Factory::GetElementsTransitionMap(
Handle<JSObject> src,
ElementsKind elements_kind) {
Isolate* i = isolate();
CALL_HEAP_FUNCTION(i,
src->GetElementsTransitionMap(i, elements_kind),
Map);
}
Handle<FixedArray> Factory::CopyFixedArray(Handle<FixedArray> array) {
CALL_HEAP_FUNCTION(isolate(), array->Copy(), FixedArray);
}
Handle<FixedDoubleArray> Factory::CopyFixedDoubleArray(
Handle<FixedDoubleArray> array) {
CALL_HEAP_FUNCTION(isolate(), array->Copy(), FixedDoubleArray);
}
Handle<JSFunction> Factory::BaseNewFunctionFromSharedFunctionInfo(
Handle<SharedFunctionInfo> function_info,
Handle<Map> function_map,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateFunction(*function_map,
*function_info,
isolate()->heap()->the_hole_value(),
pretenure),
JSFunction);
}
Handle<JSFunction> Factory::NewFunctionFromSharedFunctionInfo(
Handle<SharedFunctionInfo> function_info,
Handle<Context> context,
PretenureFlag pretenure) {
Handle<JSFunction> result = BaseNewFunctionFromSharedFunctionInfo(
function_info,
function_info->is_classic_mode()
? isolate()->function_map()
: isolate()->strict_mode_function_map(),
pretenure);
if (function_info->ic_age() != isolate()->heap()->global_ic_age()) {
function_info->ResetForNewContext(isolate()->heap()->global_ic_age());
}
result->set_context(*context);
if (!function_info->bound()) {
int number_of_literals = function_info->num_literals();
Handle<FixedArray> literals = NewFixedArray(number_of_literals, pretenure);
if (number_of_literals > 0) {
// Store the object, regexp and array functions in the literals
// array prefix. These functions will be used when creating
// object, regexp and array literals in this function.
literals->set(JSFunction::kLiteralGlobalContextIndex,
context->global_context());
}
result->set_literals(*literals);
}
if (V8::UseCrankshaft() &&
FLAG_always_opt &&
result->is_compiled() &&
!function_info->is_toplevel() &&
function_info->allows_lazy_compilation() &&
!function_info->optimization_disabled()) {
result->MarkForLazyRecompilation();
}
return result;
}
Handle<Object> Factory::NewNumber(double value,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->NumberFromDouble(value, pretenure), Object);
}
Handle<Object> Factory::NewNumberFromInt(int32_t value,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->NumberFromInt32(value, pretenure), Object);
}
Handle<Object> Factory::NewNumberFromUint(uint32_t value,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->NumberFromUint32(value, pretenure), Object);
}
Handle<JSObject> Factory::NewNeanderObject() {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateJSObjectFromMap(
isolate()->heap()->neander_map()),
JSObject);
}
Handle<Object> Factory::NewTypeError(const char* type,
Vector< Handle<Object> > args) {
return NewError("MakeTypeError", type, args);
}
Handle<Object> Factory::NewTypeError(Handle<String> message) {
return NewError("$TypeError", message);
}
Handle<Object> Factory::NewRangeError(const char* type,
Vector< Handle<Object> > args) {
return NewError("MakeRangeError", type, args);
}
Handle<Object> Factory::NewRangeError(Handle<String> message) {
return NewError("$RangeError", message);
}
Handle<Object> Factory::NewSyntaxError(const char* type, Handle<JSArray> args) {
return NewError("MakeSyntaxError", type, args);
}
Handle<Object> Factory::NewSyntaxError(Handle<String> message) {
return NewError("$SyntaxError", message);
}
Handle<Object> Factory::NewReferenceError(const char* type,
Vector< Handle<Object> > args) {
return NewError("MakeReferenceError", type, args);
}
Handle<Object> Factory::NewReferenceError(Handle<String> message) {
return NewError("$ReferenceError", message);
}
Handle<Object> Factory::NewError(const char* maker, const char* type,
Vector< Handle<Object> > args) {
v8::HandleScope scope; // Instantiate a closeable HandleScope for EscapeFrom.
Handle<FixedArray> array = NewFixedArray(args.length());
for (int i = 0; i < args.length(); i++) {
array->set(i, *args[i]);
}
Handle<JSArray> object = NewJSArrayWithElements(array);
Handle<Object> result = NewError(maker, type, object);
return result.EscapeFrom(&scope);
}
Handle<Object> Factory::NewEvalError(const char* type,
Vector< Handle<Object> > args) {
return NewError("MakeEvalError", type, args);
}
Handle<Object> Factory::NewError(const char* type,
Vector< Handle<Object> > args) {
return NewError("MakeError", type, args);
}
Handle<Object> Factory::NewError(const char* maker,
const char* type,
Handle<JSArray> args) {
Handle<String> make_str = LookupAsciiSymbol(maker);
Handle<Object> fun_obj(
isolate()->js_builtins_object()->GetPropertyNoExceptionThrown(*make_str));
// If the builtins haven't been properly configured yet this error
// constructor may not have been defined. Bail out.
if (!fun_obj->IsJSFunction())
return undefined_value();
Handle<JSFunction> fun = Handle<JSFunction>::cast(fun_obj);
Handle<Object> type_obj = LookupAsciiSymbol(type);
Handle<Object> argv[] = { type_obj, args };
// Invoke the JavaScript factory method. If an exception is thrown while
// running the factory method, use the exception as the result.
bool caught_exception;
Handle<Object> result = Execution::TryCall(fun,
isolate()->js_builtins_object(),
ARRAY_SIZE(argv),
argv,
&caught_exception);
return result;
}
Handle<Object> Factory::NewError(Handle<String> message) {
return NewError("$Error", message);
}
Handle<Object> Factory::NewError(const char* constructor,
Handle<String> message) {
Handle<String> constr = LookupAsciiSymbol(constructor);
Handle<JSFunction> fun = Handle<JSFunction>(
JSFunction::cast(isolate()->js_builtins_object()->
GetPropertyNoExceptionThrown(*constr)));
Handle<Object> argv[] = { message };
// Invoke the JavaScript factory method. If an exception is thrown while
// running the factory method, use the exception as the result.
bool caught_exception;
Handle<Object> result = Execution::TryCall(fun,
isolate()->js_builtins_object(),
ARRAY_SIZE(argv),
argv,
&caught_exception);
return result;
}
Handle<JSFunction> Factory::NewFunction(Handle<String> name,
InstanceType type,
int instance_size,
Handle<Code> code,
bool force_initial_map) {
// Allocate the function
Handle<JSFunction> function = NewFunction(name, the_hole_value());
// Set up the code pointer in both the shared function info and in
// the function itself.
function->shared()->set_code(*code);
function->set_code(*code);
if (force_initial_map ||
type != JS_OBJECT_TYPE ||
instance_size != JSObject::kHeaderSize) {
Handle<Map> initial_map = NewMap(type, instance_size);
Handle<JSObject> prototype = NewFunctionPrototype(function);
initial_map->set_prototype(*prototype);
function->set_initial_map(*initial_map);
initial_map->set_constructor(*function);
} else {
ASSERT(!function->has_initial_map());
ASSERT(!function->has_prototype());
}
return function;
}
Handle<JSFunction> Factory::NewFunctionWithPrototype(Handle<String> name,
InstanceType type,
int instance_size,
Handle<JSObject> prototype,
Handle<Code> code,
bool force_initial_map) {
// Allocate the function.
Handle<JSFunction> function = NewFunction(name, prototype);
// Set up the code pointer in both the shared function info and in
// the function itself.
function->shared()->set_code(*code);
function->set_code(*code);
if (force_initial_map ||
type != JS_OBJECT_TYPE ||
instance_size != JSObject::kHeaderSize) {
Handle<Map> initial_map = NewMap(type,
instance_size,
FAST_SMI_ONLY_ELEMENTS);
function->set_initial_map(*initial_map);
initial_map->set_constructor(*function);
}
// Set function.prototype and give the prototype a constructor
// property that refers to the function.
SetPrototypeProperty(function, prototype);
// Currently safe because it is only invoked from Genesis.
CHECK_NOT_EMPTY_HANDLE(isolate(),
JSObject::SetLocalPropertyIgnoreAttributes(
prototype, constructor_symbol(),
function, DONT_ENUM));
return function;
}
Handle<JSFunction> Factory::NewFunctionWithoutPrototype(Handle<String> name,
Handle<Code> code) {
Handle<JSFunction> function = NewFunctionWithoutPrototype(name,
CLASSIC_MODE);
function->shared()->set_code(*code);
function->set_code(*code);
ASSERT(!function->has_initial_map());
ASSERT(!function->has_prototype());
return function;
}
Handle<ScopeInfo> Factory::NewScopeInfo(int length) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateScopeInfo(length),
ScopeInfo);
}
Handle<Code> Factory::NewCode(const CodeDesc& desc,
Code::Flags flags,
Handle<Object> self_ref,
bool immovable) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->CreateCode(
desc, flags, self_ref, immovable),
Code);
}
Handle<Code> Factory::CopyCode(Handle<Code> code) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->CopyCode(*code),
Code);
}
Handle<Code> Factory::CopyCode(Handle<Code> code, Vector<byte> reloc_info) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->CopyCode(*code, reloc_info),
Code);
}
MUST_USE_RESULT static inline MaybeObject* DoCopyInsert(
DescriptorArray* array,
String* key,
Object* value,
PropertyAttributes attributes) {
CallbacksDescriptor desc(key, value, attributes);
MaybeObject* obj = array->CopyInsert(&desc, REMOVE_TRANSITIONS);
return obj;
}
// Allocate the new array.
Handle<DescriptorArray> Factory::CopyAppendForeignDescriptor(
Handle<DescriptorArray> array,
Handle<String> key,
Handle<Object> value,
PropertyAttributes attributes) {
CALL_HEAP_FUNCTION(isolate(),
DoCopyInsert(*array, *key, *value, attributes),
DescriptorArray);
}
Handle<String> Factory::SymbolFromString(Handle<String> value) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->LookupSymbol(*value), String);
}
Handle<DescriptorArray> Factory::CopyAppendCallbackDescriptors(
Handle<DescriptorArray> array,
Handle<Object> descriptors) {
v8::NeanderArray callbacks(descriptors);
int nof_callbacks = callbacks.length();
Handle<DescriptorArray> result =
NewDescriptorArray(array->number_of_descriptors() + nof_callbacks);
// Number of descriptors added to the result so far.
int descriptor_count = 0;
// Ensure that marking will not progress and change color of objects.
DescriptorArray::WhitenessWitness witness(*result);
// Copy the descriptors from the array.
for (int i = 0; i < array->number_of_descriptors(); i++) {
if (!array->IsNullDescriptor(i)) {
DescriptorArray::CopyFrom(result, descriptor_count++, array, i, witness);
}
}
// Number of duplicates detected.
int duplicates = 0;
// Fill in new callback descriptors. Process the callbacks from
// back to front so that the last callback with a given name takes
// precedence over previously added callbacks with that name.
for (int i = nof_callbacks - 1; i >= 0; i--) {
Handle<AccessorInfo> entry =
Handle<AccessorInfo>(AccessorInfo::cast(callbacks.get(i)));
// Ensure the key is a symbol before writing into the instance descriptor.
Handle<String> key =
SymbolFromString(Handle<String>(String::cast(entry->name())));
// Check if a descriptor with this name already exists before writing.
if (result->LinearSearch(*key, descriptor_count) ==
DescriptorArray::kNotFound) {
CallbacksDescriptor desc(*key, *entry, entry->property_attributes());
result->Set(descriptor_count, &desc, witness);
descriptor_count++;
} else {
duplicates++;
}
}
// If duplicates were detected, allocate a result of the right size
// and transfer the elements.
if (duplicates > 0) {
int number_of_descriptors = result->number_of_descriptors() - duplicates;
Handle<DescriptorArray> new_result =
NewDescriptorArray(number_of_descriptors);
for (int i = 0; i < number_of_descriptors; i++) {
DescriptorArray::CopyFrom(new_result, i, result, i, witness);
}
result = new_result;
}
// Sort the result before returning.
result->Sort(witness);
return result;
}
Handle<JSObject> Factory::NewJSObject(Handle<JSFunction> constructor,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateJSObject(*constructor, pretenure), JSObject);
}
Handle<GlobalObject> Factory::NewGlobalObject(
Handle<JSFunction> constructor) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->AllocateGlobalObject(*constructor),
GlobalObject);
}
Handle<JSObject> Factory::NewJSObjectFromMap(Handle<Map> map) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateJSObjectFromMap(*map, NOT_TENURED),
JSObject);
}
Handle<JSArray> Factory::NewJSArray(int capacity,
ElementsKind elements_kind,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->AllocateJSArrayAndStorage(
elements_kind,
0,
capacity,
INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE,
pretenure),
JSArray);
}
Handle<JSArray> Factory::NewJSArrayWithElements(Handle<FixedArrayBase> elements,
ElementsKind elements_kind,
PretenureFlag pretenure) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateJSArrayWithElements(*elements,
elements_kind,
pretenure),
JSArray);
}
void Factory::SetElementsCapacityAndLength(Handle<JSArray> array,
int capacity,
int length) {
ElementsAccessor* accessor = array->GetElementsAccessor();
CALL_HEAP_FUNCTION_VOID(
isolate(),
accessor->SetCapacityAndLength(*array, capacity, length));
}
void Factory::SetContent(Handle<JSArray> array,
Handle<FixedArrayBase> elements) {
CALL_HEAP_FUNCTION_VOID(
isolate(),
array->SetContent(*elements));
}
void Factory::EnsureCanContainHeapObjectElements(Handle<JSArray> array) {
CALL_HEAP_FUNCTION_VOID(
isolate(),
array->EnsureCanContainHeapObjectElements());
}
void Factory::EnsureCanContainElements(Handle<JSArray> array,
Handle<FixedArrayBase> elements,
EnsureElementsMode mode) {
CALL_HEAP_FUNCTION_VOID(
isolate(),
array->EnsureCanContainElements(*elements, mode));
}
Handle<JSProxy> Factory::NewJSProxy(Handle<Object> handler,
Handle<Object> prototype) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateJSProxy(*handler, *prototype),
JSProxy);
}
void Factory::BecomeJSObject(Handle<JSReceiver> object) {
CALL_HEAP_FUNCTION_VOID(
isolate(),
isolate()->heap()->ReinitializeJSReceiver(
*object, JS_OBJECT_TYPE, JSObject::kHeaderSize));
}
void Factory::BecomeJSFunction(Handle<JSReceiver> object) {
CALL_HEAP_FUNCTION_VOID(
isolate(),
isolate()->heap()->ReinitializeJSReceiver(
*object, JS_FUNCTION_TYPE, JSFunction::kSize));
}
void Factory::SetIdentityHash(Handle<JSObject> object, Object* hash) {
CALL_HEAP_FUNCTION_VOID(
isolate(),
object->SetIdentityHash(hash, ALLOW_CREATION));
}
Handle<SharedFunctionInfo> Factory::NewSharedFunctionInfo(
Handle<String> name,
int number_of_literals,
Handle<Code> code,
Handle<ScopeInfo> scope_info) {
Handle<SharedFunctionInfo> shared = NewSharedFunctionInfo(name);
shared->set_code(*code);
shared->set_scope_info(*scope_info);
int literals_array_size = number_of_literals;
// If the function contains object, regexp or array literals,
// allocate extra space for a literals array prefix containing the
// context.
if (number_of_literals > 0) {
literals_array_size += JSFunction::kLiteralsPrefixSize;
}
shared->set_num_literals(literals_array_size);
return shared;
}
Handle<JSMessageObject> Factory::NewJSMessageObject(
Handle<String> type,
Handle<JSArray> arguments,
int start_position,
int end_position,
Handle<Object> script,
Handle<Object> stack_trace,
Handle<Object> stack_frames) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->AllocateJSMessageObject(*type,
*arguments,
start_position,
end_position,
*script,
*stack_trace,
*stack_frames),
JSMessageObject);
}
Handle<SharedFunctionInfo> Factory::NewSharedFunctionInfo(Handle<String> name) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->AllocateSharedFunctionInfo(*name),
SharedFunctionInfo);
}
Handle<String> Factory::NumberToString(Handle<Object> number) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->NumberToString(*number), String);
}
Handle<String> Factory::Uint32ToString(uint32_t value) {
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->Uint32ToString(value), String);
}
Handle<SeededNumberDictionary> Factory::DictionaryAtNumberPut(
Handle<SeededNumberDictionary> dictionary,
uint32_t key,
Handle<Object> value) {
CALL_HEAP_FUNCTION(isolate(),
dictionary->AtNumberPut(key, *value),
SeededNumberDictionary);
}
Handle<UnseededNumberDictionary> Factory::DictionaryAtNumberPut(
Handle<UnseededNumberDictionary> dictionary,
uint32_t key,
Handle<Object> value) {
CALL_HEAP_FUNCTION(isolate(),
dictionary->AtNumberPut(key, *value),
UnseededNumberDictionary);
}
Handle<JSFunction> Factory::NewFunctionHelper(Handle<String> name,
Handle<Object> prototype) {
Handle<SharedFunctionInfo> function_share = NewSharedFunctionInfo(name);
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateFunction(*isolate()->function_map(),
*function_share,
*prototype),
JSFunction);
}
Handle<JSFunction> Factory::NewFunction(Handle<String> name,
Handle<Object> prototype) {
Handle<JSFunction> fun = NewFunctionHelper(name, prototype);
fun->set_context(isolate()->context()->global_context());
return fun;
}
Handle<JSFunction> Factory::NewFunctionWithoutPrototypeHelper(
Handle<String> name,
LanguageMode language_mode) {
Handle<SharedFunctionInfo> function_share = NewSharedFunctionInfo(name);
Handle<Map> map = (language_mode == CLASSIC_MODE)
? isolate()->function_without_prototype_map()
: isolate()->strict_mode_function_without_prototype_map();
CALL_HEAP_FUNCTION(isolate(),
isolate()->heap()->AllocateFunction(
*map,
*function_share,
*the_hole_value()),
JSFunction);
}
Handle<JSFunction> Factory::NewFunctionWithoutPrototype(
Handle<String> name,
LanguageMode language_mode) {
Handle<JSFunction> fun =
NewFunctionWithoutPrototypeHelper(name, language_mode);
fun->set_context(isolate()->context()->global_context());
return fun;
}
Handle<Object> Factory::ToObject(Handle<Object> object) {
CALL_HEAP_FUNCTION(isolate(), object->ToObject(), Object);
}
Handle<Object> Factory::ToObject(Handle<Object> object,
Handle<Context> global_context) {
CALL_HEAP_FUNCTION(isolate(), object->ToObject(*global_context), Object);
}
#ifdef ENABLE_DEBUGGER_SUPPORT
Handle<DebugInfo> Factory::NewDebugInfo(Handle<SharedFunctionInfo> shared) {
// Get the original code of the function.
Handle<Code> code(shared->code());
// Create a copy of the code before allocating the debug info object to avoid
// allocation while setting up the debug info object.
Handle<Code> original_code(*Factory::CopyCode(code));
// Allocate initial fixed array for active break points before allocating the
// debug info object to avoid allocation while setting up the debug info
// object.
Handle<FixedArray> break_points(
NewFixedArray(Debug::kEstimatedNofBreakPointsInFunction));
// Create and set up the debug info object. Debug info contains function, a
// copy of the original code, the executing code and initial fixed array for
// active break points.
Handle<DebugInfo> debug_info =
Handle<DebugInfo>::cast(NewStruct(DEBUG_INFO_TYPE));
debug_info->set_shared(*shared);
debug_info->set_original_code(*original_code);
debug_info->set_code(*code);
debug_info->set_break_points(*break_points);
// Link debug info to function.
shared->set_debug_info(*debug_info);
return debug_info;
}
#endif
Handle<JSObject> Factory::NewArgumentsObject(Handle<Object> callee,
int length) {
CALL_HEAP_FUNCTION(
isolate(),
isolate()->heap()->AllocateArgumentsObject(*callee, length), JSObject);
}
Handle<JSFunction> Factory::CreateApiFunction(
Handle<FunctionTemplateInfo> obj, ApiInstanceType instance_type) {
Handle<Code> code = isolate()->builtins()->HandleApiCall();
Handle<Code> construct_stub = isolate()->builtins()->JSConstructStubApi();
int internal_field_count = 0;
if (!obj->instance_template()->IsUndefined()) {
Handle<ObjectTemplateInfo> instance_template =
Handle<ObjectTemplateInfo>(
ObjectTemplateInfo::cast(obj->instance_template()));
internal_field_count =
Smi::cast(instance_template->internal_field_count())->value();
}
int instance_size = kPointerSize * internal_field_count;
InstanceType type = INVALID_TYPE;
switch (instance_type) {
case JavaScriptObject:
type = JS_OBJECT_TYPE;
instance_size += JSObject::kHeaderSize;
break;
case InnerGlobalObject:
type = JS_GLOBAL_OBJECT_TYPE;
instance_size += JSGlobalObject::kSize;
break;
case OuterGlobalObject:
type = JS_GLOBAL_PROXY_TYPE;
instance_size += JSGlobalProxy::kSize;
break;
default:
break;
}
ASSERT(type != INVALID_TYPE);
Handle<JSFunction> result =
NewFunction(Factory::empty_symbol(),
type,
instance_size,
code,
true);
// Set class name.
Handle<Object> class_name = Handle<Object>(obj->class_name());
if (class_name->IsString()) {
result->shared()->set_instance_class_name(*class_name);
result->shared()->set_name(*class_name);
}
Handle<Map> map = Handle<Map>(result->initial_map());
// Mark as undetectable if needed.
if (obj->undetectable()) {
map->set_is_undetectable();
}
// Mark as hidden for the __proto__ accessor if needed.
if (obj->hidden_prototype()) {
map->set_is_hidden_prototype();
}
// Mark as needs_access_check if needed.
if (obj->needs_access_check()) {
map->set_is_access_check_needed(true);
}
// Set interceptor information in the map.
if (!obj->named_property_handler()->IsUndefined()) {
map->set_has_named_interceptor();
}
if (!obj->indexed_property_handler()->IsUndefined()) {
map->set_has_indexed_interceptor();
}
// Set instance call-as-function information in the map.
if (!obj->instance_call_handler()->IsUndefined()) {
map->set_has_instance_call_handler();
}
result->shared()->set_function_data(*obj);
result->shared()->set_construct_stub(*construct_stub);
result->shared()->DontAdaptArguments();
// Recursively copy parent templates' accessors, 'data' may be modified.
Handle<DescriptorArray> array =
Handle<DescriptorArray>(map->instance_descriptors());
while (true) {
Handle<Object> props = Handle<Object>(obj->property_accessors());
if (!props->IsUndefined()) {
array = CopyAppendCallbackDescriptors(array, props);
}
Handle<Object> parent = Handle<Object>(obj->parent_template());
if (parent->IsUndefined()) break;
obj = Handle<FunctionTemplateInfo>::cast(parent);
}
if (!array->IsEmpty()) {
map->set_instance_descriptors(*array);
}
ASSERT(result->shared()->IsApiFunction());
return result;
}
Handle<MapCache> Factory::NewMapCache(int at_least_space_for) {
CALL_HEAP_FUNCTION(isolate(),
MapCache::Allocate(at_least_space_for), MapCache);
}
MUST_USE_RESULT static MaybeObject* UpdateMapCacheWith(Context* context,
FixedArray* keys,
Map* map) {
Object* result;
{ MaybeObject* maybe_result =
MapCache::cast(context->map_cache())->Put(keys, map);
if (!maybe_result->ToObject(&result)) return maybe_result;
}
context->set_map_cache(MapCache::cast(result));
return result;
}
Handle<MapCache> Factory::AddToMapCache(Handle<Context> context,
Handle<FixedArray> keys,
Handle<Map> map) {
CALL_HEAP_FUNCTION(isolate(),
UpdateMapCacheWith(*context, *keys, *map), MapCache);
}
Handle<Map> Factory::ObjectLiteralMapFromCache(Handle<Context> context,
Handle<FixedArray> keys) {
if (context->map_cache()->IsUndefined()) {
// Allocate the new map cache for the global context.
Handle<MapCache> new_cache = NewMapCache(24);
context->set_map_cache(*new_cache);
}
// Check to see whether there is a matching element in the cache.
Handle<MapCache> cache =
Handle<MapCache>(MapCache::cast(context->map_cache()));
Handle<Object> result = Handle<Object>(cache->Lookup(*keys));
if (result->IsMap()) return Handle<Map>::cast(result);
// Create a new map and add it to the cache.
Handle<Map> map =
CopyMap(Handle<Map>(context->object_function()->initial_map()),
keys->length());
AddToMapCache(context, keys, map);
return Handle<Map>(map);
}
void Factory::SetRegExpAtomData(Handle<JSRegExp> regexp,
JSRegExp::Type type,
Handle<String> source,
JSRegExp::Flags flags,
Handle<Object> data) {
Handle<FixedArray> store = NewFixedArray(JSRegExp::kAtomDataSize);
store->set(JSRegExp::kTagIndex, Smi::FromInt(type));
store->set(JSRegExp::kSourceIndex, *source);
store->set(JSRegExp::kFlagsIndex, Smi::FromInt(flags.value()));
store->set(JSRegExp::kAtomPatternIndex, *data);
regexp->set_data(*store);
}
void Factory::SetRegExpIrregexpData(Handle<JSRegExp> regexp,
JSRegExp::Type type,
Handle<String> source,
JSRegExp::Flags flags,
int capture_count) {
Handle<FixedArray> store = NewFixedArray(JSRegExp::kIrregexpDataSize);
Smi* uninitialized = Smi::FromInt(JSRegExp::kUninitializedValue);
store->set(JSRegExp::kTagIndex, Smi::FromInt(type));
store->set(JSRegExp::kSourceIndex, *source);
store->set(JSRegExp::kFlagsIndex, Smi::FromInt(flags.value()));
store->set(JSRegExp::kIrregexpASCIICodeIndex, uninitialized);
store->set(JSRegExp::kIrregexpUC16CodeIndex, uninitialized);
store->set(JSRegExp::kIrregexpASCIICodeSavedIndex, uninitialized);
store->set(JSRegExp::kIrregexpUC16CodeSavedIndex, uninitialized);
store->set(JSRegExp::kIrregexpMaxRegisterCountIndex, Smi::FromInt(0));
store->set(JSRegExp::kIrregexpCaptureCountIndex,
Smi::FromInt(capture_count));
regexp->set_data(*store);
}
void Factory::ConfigureInstance(Handle<FunctionTemplateInfo> desc,
Handle<JSObject> instance,
bool* pending_exception) {
// Configure the instance by adding the properties specified by the
// instance template.
Handle<Object> instance_template = Handle<Object>(desc->instance_template());
if (!instance_template->IsUndefined()) {
Execution::ConfigureInstance(instance,
instance_template,
pending_exception);
} else {
*pending_exception = false;
}
}
Handle<Object> Factory::GlobalConstantFor(Handle<String> name) {
Heap* h = isolate()->heap();
if (name->Equals(h->undefined_symbol())) return undefined_value();
if (name->Equals(h->nan_symbol())) return nan_value();
if (name->Equals(h->infinity_symbol())) return infinity_value();
return Handle<Object>::null();
}
Handle<Object> Factory::ToBoolean(bool value) {
return Handle<Object>(value
? isolate()->heap()->true_value()
: isolate()->heap()->false_value());
}
} } // namespace v8::internal