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/*
* Copyright (C) 2009 Google Inc. 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 "third_party/blink/renderer/platform/bindings/v8_dom_wrapper.h"
#include "third_party/blink/renderer/platform/bindings/v8_binding.h"
#include "third_party/blink/renderer/platform/bindings/v8_object_constructor.h"
#include "third_party/blink/renderer/platform/bindings/v8_per_context_data.h"
#include "third_party/blink/renderer/platform/bindings/v8_per_isolate_data.h"
namespace blink {
v8::Local<v8::Object> V8DOMWrapper::CreateWrapper(
v8::Isolate* isolate,
v8::Local<v8::Object> creation_context,
const WrapperTypeInfo* type) {
RUNTIME_CALL_TIMER_SCOPE(isolate,
RuntimeCallStats::CounterId::kCreateWrapper);
// TODO(adithyas): We should abort wrapper creation if the context access
// check fails and throws an exception.
V8WrapperInstantiationScope scope(creation_context, isolate, type);
CHECK(!scope.AccessCheckFailed());
V8PerContextData* per_context_data =
V8PerContextData::From(scope.GetContext());
v8::Local<v8::Object> wrapper;
if (per_context_data) {
wrapper = per_context_data->CreateWrapperFromCache(type);
CHECK(!wrapper.IsEmpty());
} else {
// The context is detached, but still accessible.
// TODO(yukishiino): This code does not create a wrapper with
// the correct settings. Should follow the same way as
// V8PerContextData::createWrapperFromCache, though there is no need to
// cache resulting objects or their constructors.
const DOMWrapperWorld& world = DOMWrapperWorld::World(scope.GetContext());
wrapper = type->domTemplate(isolate, world)
->InstanceTemplate()
->NewInstance(scope.GetContext())
.ToLocalChecked();
}
return wrapper;
}
bool V8DOMWrapper::IsWrapper(v8::Isolate* isolate, v8::Local<v8::Value> value) {
if (value.IsEmpty() || !value->IsObject())
return false;
v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(value);
if (object->InternalFieldCount() < kV8DefaultWrapperInternalFieldCount)
return false;
const WrapperTypeInfo* untrusted_wrapper_type_info =
ToWrapperTypeInfo(object);
V8PerIsolateData* per_isolate_data = V8PerIsolateData::From(isolate);
if (!(untrusted_wrapper_type_info && per_isolate_data))
return false;
return per_isolate_data->HasInstance(untrusted_wrapper_type_info, object);
}
bool V8DOMWrapper::HasInternalFieldsSet(v8::Local<v8::Value> value) {
if (value.IsEmpty() || !value->IsObject())
return false;
v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(value);
if (object->InternalFieldCount() < kV8DefaultWrapperInternalFieldCount)
return false;
const ScriptWrappable* untrusted_script_wrappable = ToScriptWrappable(object);
const WrapperTypeInfo* untrusted_wrapper_type_info =
ToWrapperTypeInfo(object);
return untrusted_script_wrappable && untrusted_wrapper_type_info &&
untrusted_wrapper_type_info->gin_embedder == gin::kEmbedderBlink;
}
} // namespace blink
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