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Diffstat (limited to 'src/3rdparty/v8/src/factory.cc')
| -rw-r--r-- | src/3rdparty/v8/src/factory.cc | 1194 |
1 files changed, 1194 insertions, 0 deletions
diff --git a/src/3rdparty/v8/src/factory.cc b/src/3rdparty/v8/src/factory.cc new file mode 100644 index 0000000..7dee66f --- /dev/null +++ b/src/3rdparty/v8/src/factory.cc @@ -0,0 +1,1194 @@ +// Copyright 2010 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" + +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<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<NumberDictionary> Factory::NewNumberDictionary(int at_least_space_for) { + ASSERT(0 <= at_least_space_for); + CALL_HEAP_FUNCTION(isolate(), + NumberDictionary::Allocate(at_least_space_for), + NumberDictionary); +} + + +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); +} + + +// 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); +} + +Handle<String> Factory::LookupAsciiSymbol(Vector<const char> string) { + CALL_HEAP_FUNCTION(isolate(), + isolate()->heap()->LookupAsciiSymbol(string), + 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<String> Factory::NewRawAsciiString(int length, + PretenureFlag pretenure) { + CALL_HEAP_FUNCTION( + isolate(), + isolate()->heap()->AllocateRawAsciiString(length, pretenure), + String); +} + + +Handle<String> Factory::NewRawTwoByteString(int length, + PretenureFlag pretenure) { + CALL_HEAP_FUNCTION( + isolate(), + isolate()->heap()->AllocateRawTwoByteString(length, pretenure), + String); +} + + +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::NewExternalStringFromAscii( + ExternalAsciiString::Resource* resource) { + CALL_HEAP_FUNCTION( + isolate(), + isolate()->heap()->AllocateExternalStringFromAscii(resource), + String); +} + + +Handle<String> Factory::NewExternalStringFromTwoByte( + 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> closure) { + CALL_HEAP_FUNCTION( + isolate(), + isolate()->heap()->AllocateFunctionContext(length, *closure), + Context); +} + + +Handle<Context> Factory::NewWithContext(Handle<Context> previous, + Handle<JSObject> extension, + bool is_catch_context) { + CALL_HEAP_FUNCTION( + isolate(), + isolate()->heap()->AllocateWithContext(*previous, + *extension, + is_catch_context), + 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<Proxy> wrapper = NewProxy(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_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<Proxy> Factory::NewProxy(Address addr, PretenureFlag pretenure) { + CALL_HEAP_FUNCTION(isolate(), + isolate()->heap()->AllocateProxy(addr, pretenure), + Proxy); +} + + +Handle<Proxy> Factory::NewProxy(const AccessorDescriptor* desc) { + return NewProxy((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) { + CALL_HEAP_FUNCTION( + isolate(), + isolate()->heap()->AllocateMap(type, instance_size), + 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::GetFastElementsMap(Handle<Map> src) { + CALL_HEAP_FUNCTION(isolate(), src->GetFastElementsMap(), Map); +} + + +Handle<Map> Factory::GetSlowElementsMap(Handle<Map> src) { + CALL_HEAP_FUNCTION(isolate(), src->GetSlowElementsMap(), Map); +} + + +Handle<Map> Factory::GetExternalArrayElementsMap( + Handle<Map> src, + ExternalArrayType array_type, + bool safe_to_add_transition) { + CALL_HEAP_FUNCTION(isolate(), + src->GetExternalArrayElementsMap(array_type, + safe_to_add_transition), + Map); +} + + +Handle<FixedArray> Factory::CopyFixedArray(Handle<FixedArray> array) { + CALL_HEAP_FUNCTION(isolate(), array->Copy(), FixedArray); +} + + +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->strict_mode() + ? isolate()->strict_mode_function_map() + : isolate()->function_map(), + pretenure); + + result->set_context(*context); + 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); + result->set_next_function_link(isolate()->heap()->undefined_value()); + + if (V8::UseCrankshaft() && + FLAG_always_opt && + result->is_compiled() && + !function_info->is_toplevel() && + function_info->allows_lazy_compilation()) { + 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(int value) { + CALL_HEAP_FUNCTION( + isolate(), + isolate()->heap()->NumberFromInt32(value), Object); +} + + +Handle<Object> Factory::NewNumberFromUint(uint32_t value) { + CALL_HEAP_FUNCTION( + isolate(), + isolate()->heap()->NumberFromUint32(value), 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); + Object** argv[2] = { type_obj.location(), + Handle<Object>::cast(args).location() }; + + // 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(), 2, 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))); + Object** argv[1] = { Handle<Object>::cast(message).location() }; + + // 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(), 1, 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()); + + // Setup 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); + + // Setup 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); + 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. + SetLocalPropertyNoThrow(prototype, constructor_symbol(), function, DONT_ENUM); + return function; +} + + +Handle<JSFunction> Factory::NewFunctionWithoutPrototype(Handle<String> name, + Handle<Code> code) { + Handle<JSFunction> function = NewFunctionWithoutPrototype(name, + kNonStrictMode); + function->shared()->set_code(*code); + function->set_code(*code); + ASSERT(!function->has_initial_map()); + ASSERT(!function->has_prototype()); + return function; +} + + +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::CopyAppendProxyDescriptor( + 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; + + // Copy the descriptors from the array. + for (int i = 0; i < array->number_of_descriptors(); i++) { + if (array->GetType(i) != NULL_DESCRIPTOR) { + result->CopyFrom(descriptor_count++, *array, i); + } + } + + // 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); + 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++) { + new_result->CopyFrom(i, *result, i); + } + result = new_result; + } + + // Sort the result before returning. + result->Sort(); + 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, + PretenureFlag pretenure) { + Handle<JSObject> obj = NewJSObject(isolate()->array_function(), pretenure); + CALL_HEAP_FUNCTION(isolate(), + Handle<JSArray>::cast(obj)->Initialize(capacity), + JSArray); +} + + +Handle<JSArray> Factory::NewJSArrayWithElements(Handle<FixedArray> elements, + PretenureFlag pretenure) { + Handle<JSArray> result = + Handle<JSArray>::cast(NewJSObject(isolate()->array_function(), + pretenure)); + result->SetContent(*elements); + return result; +} + + +Handle<SharedFunctionInfo> Factory::NewSharedFunctionInfo( + Handle<String> name, + int number_of_literals, + Handle<Code> code, + Handle<SerializedScopeInfo> 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<NumberDictionary> Factory::DictionaryAtNumberPut( + Handle<NumberDictionary> dictionary, + uint32_t key, + Handle<Object> value) { + CALL_HEAP_FUNCTION(isolate(), + dictionary->AtNumberPut(key, *value), + NumberDictionary); +} + + +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, + StrictModeFlag strict_mode) { + Handle<SharedFunctionInfo> function_share = NewSharedFunctionInfo(name); + Handle<Map> map = strict_mode == kStrictMode + ? isolate()->strict_mode_function_without_prototype_map() + : isolate()->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, + StrictModeFlag strict_mode) { + Handle<JSFunction> fun = NewFunctionWithoutPrototypeHelper(name, strict_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); + + store->set(JSRegExp::kTagIndex, Smi::FromInt(type)); + store->set(JSRegExp::kSourceIndex, *source); + store->set(JSRegExp::kFlagsIndex, Smi::FromInt(flags.value())); + store->set(JSRegExp::kIrregexpASCIICodeIndex, HEAP->the_hole_value()); + store->set(JSRegExp::kIrregexpUC16CodeIndex, HEAP->the_hole_value()); + 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; + } +} + + +} } // namespace v8::internal |