090830e411
R=mstarzinger@chromium.org BUG= TEST= Review URL: https://chromiumcodereview.appspot.com/10748002 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12021 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
871 lines
24 KiB
C++
871 lines
24 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "accessors.h"
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#include "contexts.h"
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#include "deoptimizer.h"
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#include "execution.h"
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#include "factory.h"
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#include "frames-inl.h"
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#include "isolate.h"
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#include "list-inl.h"
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#include "property-details.h"
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namespace v8 {
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namespace internal {
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template <class C>
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static C* FindInPrototypeChain(Object* obj, bool* found_it) {
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ASSERT(!*found_it);
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Heap* heap = HEAP;
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while (!Is<C>(obj)) {
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if (obj == heap->null_value()) return NULL;
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obj = obj->GetPrototype();
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}
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*found_it = true;
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return C::cast(obj);
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}
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// Entry point that never should be called.
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MaybeObject* Accessors::IllegalSetter(JSObject*, Object*, void*) {
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UNREACHABLE();
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return NULL;
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}
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Object* Accessors::IllegalGetAccessor(Object* object, void*) {
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UNREACHABLE();
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return object;
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}
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MaybeObject* Accessors::ReadOnlySetAccessor(JSObject*, Object* value, void*) {
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// According to ECMA-262, section 8.6.2.2, page 28, setting
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// read-only properties must be silently ignored.
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return value;
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}
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//
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// Accessors::ArrayLength
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//
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MaybeObject* Accessors::ArrayGetLength(Object* object, void*) {
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// Traverse the prototype chain until we reach an array.
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bool found_it = false;
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JSArray* holder = FindInPrototypeChain<JSArray>(object, &found_it);
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if (!found_it) return Smi::FromInt(0);
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return holder->length();
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}
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// The helper function will 'flatten' Number objects.
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Object* Accessors::FlattenNumber(Object* value) {
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if (value->IsNumber() || !value->IsJSValue()) return value;
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JSValue* wrapper = JSValue::cast(value);
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ASSERT(Isolate::Current()->context()->global_context()->number_function()->
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has_initial_map());
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Map* number_map = Isolate::Current()->context()->global_context()->
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number_function()->initial_map();
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if (wrapper->map() == number_map) return wrapper->value();
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return value;
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}
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MaybeObject* Accessors::ArraySetLength(JSObject* object, Object* value, void*) {
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Isolate* isolate = object->GetIsolate();
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// This means one of the object's prototypes is a JSArray and the
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// object does not have a 'length' property. Calling SetProperty
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// causes an infinite loop.
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if (!object->IsJSArray()) {
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return object->SetLocalPropertyIgnoreAttributes(
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isolate->heap()->length_symbol(), value, NONE);
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}
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value = FlattenNumber(value);
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// Need to call methods that may trigger GC.
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HandleScope scope(isolate);
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// Protect raw pointers.
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Handle<JSObject> object_handle(object, isolate);
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Handle<Object> value_handle(value, isolate);
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bool has_exception;
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Handle<Object> uint32_v = Execution::ToUint32(value_handle, &has_exception);
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if (has_exception) return Failure::Exception();
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Handle<Object> number_v = Execution::ToNumber(value_handle, &has_exception);
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if (has_exception) return Failure::Exception();
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if (uint32_v->Number() == number_v->Number()) {
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return Handle<JSArray>::cast(object_handle)->SetElementsLength(*uint32_v);
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}
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return isolate->Throw(
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*isolate->factory()->NewRangeError("invalid_array_length",
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HandleVector<Object>(NULL, 0)));
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}
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const AccessorDescriptor Accessors::ArrayLength = {
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ArrayGetLength,
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ArraySetLength,
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0
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};
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//
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// Accessors::StringLength
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//
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MaybeObject* Accessors::StringGetLength(Object* object, void*) {
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Object* value = object;
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if (object->IsJSValue()) value = JSValue::cast(object)->value();
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if (value->IsString()) return Smi::FromInt(String::cast(value)->length());
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// If object is not a string we return 0 to be compatible with WebKit.
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// Note: Firefox returns the length of ToString(object).
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return Smi::FromInt(0);
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}
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const AccessorDescriptor Accessors::StringLength = {
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StringGetLength,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptSource
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//
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MaybeObject* Accessors::ScriptGetSource(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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return Script::cast(script)->source();
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}
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const AccessorDescriptor Accessors::ScriptSource = {
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ScriptGetSource,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptName
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//
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MaybeObject* Accessors::ScriptGetName(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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return Script::cast(script)->name();
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}
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const AccessorDescriptor Accessors::ScriptName = {
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ScriptGetName,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptId
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//
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MaybeObject* Accessors::ScriptGetId(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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return Script::cast(script)->id();
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}
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const AccessorDescriptor Accessors::ScriptId = {
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ScriptGetId,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptLineOffset
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//
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MaybeObject* Accessors::ScriptGetLineOffset(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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return Script::cast(script)->line_offset();
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}
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const AccessorDescriptor Accessors::ScriptLineOffset = {
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ScriptGetLineOffset,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptColumnOffset
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//
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MaybeObject* Accessors::ScriptGetColumnOffset(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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return Script::cast(script)->column_offset();
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}
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const AccessorDescriptor Accessors::ScriptColumnOffset = {
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ScriptGetColumnOffset,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptData
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//
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MaybeObject* Accessors::ScriptGetData(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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return Script::cast(script)->data();
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}
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const AccessorDescriptor Accessors::ScriptData = {
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ScriptGetData,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptType
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//
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MaybeObject* Accessors::ScriptGetType(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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return Script::cast(script)->type();
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}
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const AccessorDescriptor Accessors::ScriptType = {
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ScriptGetType,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptCompilationType
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//
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MaybeObject* Accessors::ScriptGetCompilationType(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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return Script::cast(script)->compilation_type();
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}
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const AccessorDescriptor Accessors::ScriptCompilationType = {
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ScriptGetCompilationType,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptGetLineEnds
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//
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MaybeObject* Accessors::ScriptGetLineEnds(Object* object, void*) {
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JSValue* wrapper = JSValue::cast(object);
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Isolate* isolate = wrapper->GetIsolate();
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HandleScope scope(isolate);
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Handle<Script> script(Script::cast(wrapper->value()), isolate);
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InitScriptLineEnds(script);
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ASSERT(script->line_ends()->IsFixedArray());
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Handle<FixedArray> line_ends(FixedArray::cast(script->line_ends()));
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// We do not want anyone to modify this array from JS.
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ASSERT(*line_ends == isolate->heap()->empty_fixed_array() ||
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line_ends->map() == isolate->heap()->fixed_cow_array_map());
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Handle<JSArray> js_array =
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isolate->factory()->NewJSArrayWithElements(line_ends);
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return *js_array;
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}
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const AccessorDescriptor Accessors::ScriptLineEnds = {
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ScriptGetLineEnds,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptGetContextData
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//
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MaybeObject* Accessors::ScriptGetContextData(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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return Script::cast(script)->context_data();
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}
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const AccessorDescriptor Accessors::ScriptContextData = {
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ScriptGetContextData,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptGetEvalFromScript
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//
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MaybeObject* Accessors::ScriptGetEvalFromScript(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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if (!Script::cast(script)->eval_from_shared()->IsUndefined()) {
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Handle<SharedFunctionInfo> eval_from_shared(
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SharedFunctionInfo::cast(Script::cast(script)->eval_from_shared()));
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if (eval_from_shared->script()->IsScript()) {
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Handle<Script> eval_from_script(Script::cast(eval_from_shared->script()));
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return *GetScriptWrapper(eval_from_script);
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}
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}
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return HEAP->undefined_value();
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}
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const AccessorDescriptor Accessors::ScriptEvalFromScript = {
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ScriptGetEvalFromScript,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptGetEvalFromScriptPosition
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//
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MaybeObject* Accessors::ScriptGetEvalFromScriptPosition(Object* object, void*) {
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HandleScope scope;
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Handle<Script> script(Script::cast(JSValue::cast(object)->value()));
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// If this is not a script compiled through eval there is no eval position.
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int compilation_type = Smi::cast(script->compilation_type())->value();
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if (compilation_type != Script::COMPILATION_TYPE_EVAL) {
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return HEAP->undefined_value();
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}
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// Get the function from where eval was called and find the source position
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// from the instruction offset.
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Handle<Code> code(SharedFunctionInfo::cast(
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script->eval_from_shared())->code());
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return Smi::FromInt(code->SourcePosition(code->instruction_start() +
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script->eval_from_instructions_offset()->value()));
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}
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const AccessorDescriptor Accessors::ScriptEvalFromScriptPosition = {
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ScriptGetEvalFromScriptPosition,
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IllegalSetter,
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0
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};
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//
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// Accessors::ScriptGetEvalFromFunctionName
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//
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MaybeObject* Accessors::ScriptGetEvalFromFunctionName(Object* object, void*) {
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Object* script = JSValue::cast(object)->value();
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Handle<SharedFunctionInfo> shared(SharedFunctionInfo::cast(
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Script::cast(script)->eval_from_shared()));
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// Find the name of the function calling eval.
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if (!shared->name()->IsUndefined()) {
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return shared->name();
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} else {
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return shared->inferred_name();
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}
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}
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const AccessorDescriptor Accessors::ScriptEvalFromFunctionName = {
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ScriptGetEvalFromFunctionName,
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IllegalSetter,
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0
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};
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//
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// Accessors::FunctionPrototype
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//
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MaybeObject* Accessors::FunctionGetPrototype(Object* object, void*) {
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Heap* heap = Isolate::Current()->heap();
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bool found_it = false;
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JSFunction* function = FindInPrototypeChain<JSFunction>(object, &found_it);
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if (!found_it) return heap->undefined_value();
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while (!function->should_have_prototype()) {
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found_it = false;
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function = FindInPrototypeChain<JSFunction>(object->GetPrototype(),
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&found_it);
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// There has to be one because we hit the getter.
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ASSERT(found_it);
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}
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if (!function->has_prototype()) {
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Object* prototype;
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{ MaybeObject* maybe_prototype = heap->AllocateFunctionPrototype(function);
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if (!maybe_prototype->ToObject(&prototype)) return maybe_prototype;
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}
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Object* result;
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{ MaybeObject* maybe_result = function->SetPrototype(prototype);
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if (!maybe_result->ToObject(&result)) return maybe_result;
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}
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}
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return function->prototype();
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}
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MaybeObject* Accessors::FunctionSetPrototype(JSObject* object,
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Object* value,
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void*) {
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Heap* heap = object->GetHeap();
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bool found_it = false;
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JSFunction* function = FindInPrototypeChain<JSFunction>(object, &found_it);
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if (!found_it) return heap->undefined_value();
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if (!function->should_have_prototype()) {
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// Since we hit this accessor, object will have no prototype property.
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return object->SetLocalPropertyIgnoreAttributes(heap->prototype_symbol(),
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value,
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NONE);
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}
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Object* prototype;
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{ MaybeObject* maybe_prototype = function->SetPrototype(value);
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if (!maybe_prototype->ToObject(&prototype)) return maybe_prototype;
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}
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ASSERT(function->prototype() == value);
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return function;
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}
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const AccessorDescriptor Accessors::FunctionPrototype = {
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FunctionGetPrototype,
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FunctionSetPrototype,
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0
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};
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//
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// Accessors::FunctionLength
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//
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MaybeObject* Accessors::FunctionGetLength(Object* object, void*) {
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bool found_it = false;
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JSFunction* function = FindInPrototypeChain<JSFunction>(object, &found_it);
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if (!found_it) return Smi::FromInt(0);
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// Check if already compiled.
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if (!function->shared()->is_compiled()) {
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// If the function isn't compiled yet, the length is not computed
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// correctly yet. Compile it now and return the right length.
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HandleScope scope;
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Handle<JSFunction> handle(function);
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if (!JSFunction::CompileLazy(handle, KEEP_EXCEPTION)) {
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return Failure::Exception();
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}
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return Smi::FromInt(handle->shared()->length());
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} else {
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return Smi::FromInt(function->shared()->length());
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}
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}
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const AccessorDescriptor Accessors::FunctionLength = {
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FunctionGetLength,
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ReadOnlySetAccessor,
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0
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};
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//
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// Accessors::FunctionName
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//
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MaybeObject* Accessors::FunctionGetName(Object* object, void*) {
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bool found_it = false;
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JSFunction* holder = FindInPrototypeChain<JSFunction>(object, &found_it);
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if (!found_it) return HEAP->undefined_value();
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return holder->shared()->name();
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}
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const AccessorDescriptor Accessors::FunctionName = {
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FunctionGetName,
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ReadOnlySetAccessor,
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0
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};
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//
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// Accessors::FunctionArguments
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//
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static MaybeObject* ConstructArgumentsObjectForInlinedFunction(
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JavaScriptFrame* frame,
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Handle<JSFunction> inlined_function,
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int inlined_frame_index) {
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Factory* factory = Isolate::Current()->factory();
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Vector<SlotRef> args_slots =
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SlotRef::ComputeSlotMappingForArguments(
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frame,
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inlined_frame_index,
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inlined_function->shared()->formal_parameter_count());
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int args_count = args_slots.length();
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Handle<JSObject> arguments =
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factory->NewArgumentsObject(inlined_function, args_count);
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Handle<FixedArray> array = factory->NewFixedArray(args_count);
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for (int i = 0; i < args_count; ++i) {
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Handle<Object> value = args_slots[i].GetValue();
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array->set(i, *value);
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}
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arguments->set_elements(*array);
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args_slots.Dispose();
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// Return the freshly allocated arguments object.
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return *arguments;
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}
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MaybeObject* Accessors::FunctionGetArguments(Object* object, void*) {
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Isolate* isolate = Isolate::Current();
|
|
HandleScope scope(isolate);
|
|
bool found_it = false;
|
|
JSFunction* holder = FindInPrototypeChain<JSFunction>(object, &found_it);
|
|
if (!found_it) return isolate->heap()->undefined_value();
|
|
Handle<JSFunction> function(holder, isolate);
|
|
|
|
if (function->shared()->native()) return isolate->heap()->null_value();
|
|
// Find the top invocation of the function by traversing frames.
|
|
List<JSFunction*> functions(2);
|
|
for (JavaScriptFrameIterator it(isolate); !it.done(); it.Advance()) {
|
|
JavaScriptFrame* frame = it.frame();
|
|
frame->GetFunctions(&functions);
|
|
for (int i = functions.length() - 1; i >= 0; i--) {
|
|
// Skip all frames that aren't invocations of the given function.
|
|
if (functions[i] != *function) continue;
|
|
|
|
if (i > 0) {
|
|
// The function in question was inlined. Inlined functions have the
|
|
// correct number of arguments and no allocated arguments object, so
|
|
// we can construct a fresh one by interpreting the function's
|
|
// deoptimization input data.
|
|
return ConstructArgumentsObjectForInlinedFunction(frame, function, i);
|
|
}
|
|
|
|
if (!frame->is_optimized()) {
|
|
// If there is an arguments variable in the stack, we return that.
|
|
Handle<ScopeInfo> scope_info(function->shared()->scope_info());
|
|
int index = scope_info->StackSlotIndex(
|
|
isolate->heap()->arguments_symbol());
|
|
if (index >= 0) {
|
|
Handle<Object> arguments(frame->GetExpression(index), isolate);
|
|
if (!arguments->IsArgumentsMarker()) return *arguments;
|
|
}
|
|
}
|
|
|
|
// If there is no arguments variable in the stack or we have an
|
|
// optimized frame, we find the frame that holds the actual arguments
|
|
// passed to the function.
|
|
it.AdvanceToArgumentsFrame();
|
|
frame = it.frame();
|
|
|
|
// Get the number of arguments and construct an arguments object
|
|
// mirror for the right frame.
|
|
const int length = frame->ComputeParametersCount();
|
|
Handle<JSObject> arguments = isolate->factory()->NewArgumentsObject(
|
|
function, length);
|
|
Handle<FixedArray> array = isolate->factory()->NewFixedArray(length);
|
|
|
|
// Copy the parameters to the arguments object.
|
|
ASSERT(array->length() == length);
|
|
for (int i = 0; i < length; i++) array->set(i, frame->GetParameter(i));
|
|
arguments->set_elements(*array);
|
|
|
|
// Return the freshly allocated arguments object.
|
|
return *arguments;
|
|
}
|
|
functions.Rewind(0);
|
|
}
|
|
|
|
// No frame corresponding to the given function found. Return null.
|
|
return isolate->heap()->null_value();
|
|
}
|
|
|
|
|
|
const AccessorDescriptor Accessors::FunctionArguments = {
|
|
FunctionGetArguments,
|
|
ReadOnlySetAccessor,
|
|
0
|
|
};
|
|
|
|
|
|
//
|
|
// Accessors::FunctionCaller
|
|
//
|
|
|
|
|
|
static MaybeObject* CheckNonStrictCallerOrThrow(
|
|
Isolate* isolate,
|
|
JSFunction* caller) {
|
|
DisableAssertNoAllocation enable_allocation;
|
|
if (!caller->shared()->is_classic_mode()) {
|
|
return isolate->Throw(
|
|
*isolate->factory()->NewTypeError("strict_caller",
|
|
HandleVector<Object>(NULL, 0)));
|
|
}
|
|
return caller;
|
|
}
|
|
|
|
|
|
class FrameFunctionIterator {
|
|
public:
|
|
FrameFunctionIterator(Isolate* isolate, const AssertNoAllocation& promise)
|
|
: frame_iterator_(isolate),
|
|
functions_(2),
|
|
index_(0) {
|
|
GetFunctions();
|
|
}
|
|
JSFunction* next() {
|
|
if (functions_.length() == 0) return NULL;
|
|
JSFunction* next_function = functions_[index_];
|
|
index_--;
|
|
if (index_ < 0) {
|
|
GetFunctions();
|
|
}
|
|
return next_function;
|
|
}
|
|
|
|
// Iterate through functions until the first occurence of 'function'.
|
|
// Returns true if 'function' is found, and false if the iterator ends
|
|
// without finding it.
|
|
bool Find(JSFunction* function) {
|
|
JSFunction* next_function;
|
|
do {
|
|
next_function = next();
|
|
if (next_function == function) return true;
|
|
} while (next_function != NULL);
|
|
return false;
|
|
}
|
|
|
|
private:
|
|
void GetFunctions() {
|
|
functions_.Rewind(0);
|
|
if (frame_iterator_.done()) return;
|
|
JavaScriptFrame* frame = frame_iterator_.frame();
|
|
frame->GetFunctions(&functions_);
|
|
ASSERT(functions_.length() > 0);
|
|
frame_iterator_.Advance();
|
|
index_ = functions_.length() - 1;
|
|
}
|
|
JavaScriptFrameIterator frame_iterator_;
|
|
List<JSFunction*> functions_;
|
|
int index_;
|
|
};
|
|
|
|
|
|
MaybeObject* Accessors::FunctionGetCaller(Object* object, void*) {
|
|
Isolate* isolate = Isolate::Current();
|
|
HandleScope scope(isolate);
|
|
AssertNoAllocation no_alloc;
|
|
bool found_it = false;
|
|
JSFunction* holder = FindInPrototypeChain<JSFunction>(object, &found_it);
|
|
if (!found_it) return isolate->heap()->undefined_value();
|
|
if (holder->shared()->native()) return isolate->heap()->null_value();
|
|
Handle<JSFunction> function(holder, isolate);
|
|
|
|
FrameFunctionIterator it(isolate, no_alloc);
|
|
|
|
// Find the function from the frames.
|
|
if (!it.Find(*function)) {
|
|
// No frame corresponding to the given function found. Return null.
|
|
return isolate->heap()->null_value();
|
|
}
|
|
|
|
// Find previously called non-toplevel function.
|
|
JSFunction* caller;
|
|
do {
|
|
caller = it.next();
|
|
if (caller == NULL) return isolate->heap()->null_value();
|
|
} while (caller->shared()->is_toplevel());
|
|
|
|
// If caller is a built-in function and caller's caller is also built-in,
|
|
// use that instead.
|
|
JSFunction* potential_caller = caller;
|
|
while (potential_caller != NULL && potential_caller->IsBuiltin()) {
|
|
caller = potential_caller;
|
|
potential_caller = it.next();
|
|
}
|
|
// If caller is bound, return null. This is compatible with JSC, and
|
|
// allows us to make bound functions use the strict function map
|
|
// and its associated throwing caller and arguments.
|
|
if (caller->shared()->bound()) {
|
|
return isolate->heap()->null_value();
|
|
}
|
|
return CheckNonStrictCallerOrThrow(isolate, caller);
|
|
}
|
|
|
|
|
|
const AccessorDescriptor Accessors::FunctionCaller = {
|
|
FunctionGetCaller,
|
|
ReadOnlySetAccessor,
|
|
0
|
|
};
|
|
|
|
|
|
//
|
|
// Accessors::ObjectPrototype
|
|
//
|
|
|
|
|
|
MaybeObject* Accessors::ObjectGetPrototype(Object* receiver, void*) {
|
|
Object* current = receiver->GetPrototype();
|
|
while (current->IsJSObject() &&
|
|
JSObject::cast(current)->map()->is_hidden_prototype()) {
|
|
current = current->GetPrototype();
|
|
}
|
|
return current;
|
|
}
|
|
|
|
|
|
MaybeObject* Accessors::ObjectSetPrototype(JSObject* receiver,
|
|
Object* value,
|
|
void*) {
|
|
const bool skip_hidden_prototypes = true;
|
|
// To be consistent with other Set functions, return the value.
|
|
return receiver->SetPrototype(value, skip_hidden_prototypes);
|
|
}
|
|
|
|
|
|
const AccessorDescriptor Accessors::ObjectPrototype = {
|
|
ObjectGetPrototype,
|
|
ObjectSetPrototype,
|
|
0
|
|
};
|
|
|
|
|
|
//
|
|
// Accessors::MakeModuleExport
|
|
//
|
|
|
|
static v8::Handle<v8::Value> ModuleGetExport(
|
|
v8::Local<v8::String> property,
|
|
const v8::AccessorInfo& info) {
|
|
JSModule* instance = JSModule::cast(*v8::Utils::OpenHandle(*info.Holder()));
|
|
Context* context = Context::cast(instance->context());
|
|
ASSERT(context->IsModuleContext());
|
|
int slot = info.Data()->Int32Value();
|
|
Object* value = context->get(slot);
|
|
if (value->IsTheHole()) {
|
|
Handle<String> name = v8::Utils::OpenHandle(*property);
|
|
Isolate* isolate = instance->GetIsolate();
|
|
isolate->ScheduleThrow(
|
|
*isolate->factory()->NewReferenceError("not_defined",
|
|
HandleVector(&name, 1)));
|
|
return v8::Handle<v8::Value>();
|
|
}
|
|
return v8::Utils::ToLocal(Handle<Object>(value));
|
|
}
|
|
|
|
|
|
static void ModuleSetExport(
|
|
v8::Local<v8::String> property,
|
|
v8::Local<v8::Value> value,
|
|
const v8::AccessorInfo& info) {
|
|
JSModule* instance = JSModule::cast(*v8::Utils::OpenHandle(*info.Holder()));
|
|
Context* context = Context::cast(instance->context());
|
|
ASSERT(context->IsModuleContext());
|
|
int slot = info.Data()->Int32Value();
|
|
Object* old_value = context->get(slot);
|
|
if (old_value->IsTheHole()) {
|
|
Handle<String> name = v8::Utils::OpenHandle(*property);
|
|
Isolate* isolate = instance->GetIsolate();
|
|
isolate->ScheduleThrow(
|
|
*isolate->factory()->NewReferenceError("not_defined",
|
|
HandleVector(&name, 1)));
|
|
return;
|
|
}
|
|
context->set(slot, *v8::Utils::OpenHandle(*value));
|
|
}
|
|
|
|
|
|
Handle<AccessorInfo> Accessors::MakeModuleExport(
|
|
Handle<String> name,
|
|
int index,
|
|
PropertyAttributes attributes) {
|
|
Factory* factory = name->GetIsolate()->factory();
|
|
Handle<AccessorInfo> info = factory->NewAccessorInfo();
|
|
info->set_property_attributes(attributes);
|
|
info->set_all_can_read(true);
|
|
info->set_all_can_write(true);
|
|
info->set_name(*name);
|
|
info->set_data(Smi::FromInt(index));
|
|
Handle<Object> getter = v8::FromCData(&ModuleGetExport);
|
|
Handle<Object> setter = v8::FromCData(&ModuleSetExport);
|
|
info->set_getter(*getter);
|
|
if (!(attributes & ReadOnly)) info->set_setter(*setter);
|
|
return info;
|
|
}
|
|
|
|
|
|
} } // namespace v8::internal
|