| // Copyright 2015 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/wasm/wasm-js.h" |
| |
| #include "src/api-inl.h" |
| #include "src/api-natives.h" |
| #include "src/assert-scope.h" |
| #include "src/ast/ast.h" |
| #include "src/execution.h" |
| #include "src/handles.h" |
| #include "src/heap/factory.h" |
| #include "src/isolate.h" |
| #include "src/objects-inl.h" |
| #include "src/objects/js-promise-inl.h" |
| #include "src/objects/templates.h" |
| #include "src/parsing/parse-info.h" |
| #include "src/trap-handler/trap-handler.h" |
| #include "src/wasm/streaming-decoder.h" |
| #include "src/wasm/wasm-engine.h" |
| #include "src/wasm/wasm-limits.h" |
| #include "src/wasm/wasm-memory.h" |
| #include "src/wasm/wasm-objects-inl.h" |
| #include "src/wasm/wasm-serialization.h" |
| |
| using v8::internal::wasm::ErrorThrower; |
| |
| namespace v8 { |
| |
| class WasmStreaming::WasmStreamingImpl { |
| public: |
| WasmStreamingImpl( |
| Isolate* isolate, |
| std::shared_ptr<internal::wasm::CompilationResultResolver> resolver) |
| : isolate_(isolate), resolver_(std::move(resolver)) { |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate_); |
| auto enabled_features = i::wasm::WasmFeaturesFromIsolate(i_isolate); |
| streaming_decoder_ = i_isolate->wasm_engine()->StartStreamingCompilation( |
| i_isolate, enabled_features, handle(i_isolate->context(), i_isolate), |
| resolver_); |
| } |
| |
| void OnBytesReceived(const uint8_t* bytes, size_t size) { |
| streaming_decoder_->OnBytesReceived(i::Vector<const uint8_t>(bytes, size)); |
| } |
| void Finish() { streaming_decoder_->Finish(); } |
| |
| void Abort(MaybeLocal<Value> exception) { |
| i::HandleScope scope(reinterpret_cast<i::Isolate*>(isolate_)); |
| streaming_decoder_->Abort(); |
| |
| // If no exception value is provided, we do not reject the promise. This can |
| // happen when streaming compilation gets aborted when no script execution |
| // is allowed anymore, e.g. when a browser tab gets refreshed. |
| if (exception.IsEmpty()) return; |
| |
| resolver_->OnCompilationFailed( |
| Utils::OpenHandle(*exception.ToLocalChecked())); |
| } |
| |
| bool SetCompiledModuleBytes(const uint8_t* bytes, size_t size) { |
| if (!i::wasm::IsSupportedVersion({bytes, size})) return false; |
| return streaming_decoder_->SetCompiledModuleBytes({bytes, size}); |
| } |
| |
| void SetClient(std::shared_ptr<Client> client) { |
| // There are no other event notifications so just pass client to decoder. |
| // Wrap the client with a callback here so we can also wrap the result. |
| streaming_decoder_->SetModuleCompiledCallback( |
| [client](const std::shared_ptr<i::wasm::NativeModule>& native_module) { |
| client->OnModuleCompiled(Utils::Convert(native_module)); |
| }); |
| } |
| |
| private: |
| Isolate* isolate_ = nullptr; |
| std::shared_ptr<internal::wasm::StreamingDecoder> streaming_decoder_; |
| std::shared_ptr<internal::wasm::CompilationResultResolver> resolver_; |
| }; |
| |
| WasmStreaming::WasmStreaming(std::unique_ptr<WasmStreamingImpl> impl) |
| : impl_(std::move(impl)) {} |
| |
| // The destructor is defined here because we have a unique_ptr with forward |
| // declaration. |
| WasmStreaming::~WasmStreaming() = default; |
| |
| void WasmStreaming::OnBytesReceived(const uint8_t* bytes, size_t size) { |
| impl_->OnBytesReceived(bytes, size); |
| } |
| |
| void WasmStreaming::Finish() { impl_->Finish(); } |
| |
| void WasmStreaming::Abort(MaybeLocal<Value> exception) { |
| impl_->Abort(exception); |
| } |
| |
| bool WasmStreaming::SetCompiledModuleBytes(const uint8_t* bytes, size_t size) { |
| return impl_->SetCompiledModuleBytes(bytes, size); |
| } |
| |
| void WasmStreaming::SetClient(std::shared_ptr<Client> client) { |
| impl_->SetClient(client); |
| } |
| |
| // static |
| std::shared_ptr<WasmStreaming> WasmStreaming::Unpack(Isolate* isolate, |
| Local<Value> value) { |
| i::HandleScope scope(reinterpret_cast<i::Isolate*>(isolate)); |
| auto managed = |
| i::Handle<i::Managed<WasmStreaming>>::cast(Utils::OpenHandle(*value)); |
| return managed->get(); |
| } |
| |
| namespace { |
| |
| #define ASSIGN(type, var, expr) \ |
| Local<type> var; \ |
| do { \ |
| if (!expr.ToLocal(&var)) { \ |
| DCHECK(i_isolate->has_scheduled_exception()); \ |
| return; \ |
| } else { \ |
| DCHECK(!i_isolate->has_scheduled_exception()); \ |
| } \ |
| } while (false) |
| |
| // Like an ErrorThrower, but turns all pending exceptions into scheduled |
| // exceptions when going out of scope. Use this in API methods. |
| // Note that pending exceptions are not necessarily created by the ErrorThrower, |
| // but e.g. by the wasm start function. There might also be a scheduled |
| // exception, created by another API call (e.g. v8::Object::Get). But there |
| // should never be both pending and scheduled exceptions. |
| class ScheduledErrorThrower : public ErrorThrower { |
| public: |
| ScheduledErrorThrower(i::Isolate* isolate, const char* context) |
| : ErrorThrower(isolate, context) {} |
| |
| ~ScheduledErrorThrower(); |
| }; |
| |
| ScheduledErrorThrower::~ScheduledErrorThrower() { |
| // There should never be both a pending and a scheduled exception. |
| DCHECK(!isolate()->has_scheduled_exception() || |
| !isolate()->has_pending_exception()); |
| // Don't throw another error if there is already a scheduled error. |
| if (isolate()->has_scheduled_exception()) { |
| Reset(); |
| } else if (isolate()->has_pending_exception()) { |
| Reset(); |
| isolate()->OptionalRescheduleException(false); |
| } else if (error()) { |
| isolate()->ScheduleThrow(*Reify()); |
| } |
| } |
| |
| i::Handle<i::String> v8_str(i::Isolate* isolate, const char* str) { |
| return isolate->factory()->NewStringFromAsciiChecked(str); |
| } |
| Local<String> v8_str(Isolate* isolate, const char* str) { |
| return Utils::ToLocal(v8_str(reinterpret_cast<i::Isolate*>(isolate), str)); |
| } |
| |
| i::MaybeHandle<i::WasmModuleObject> GetFirstArgumentAsModule( |
| const v8::FunctionCallbackInfo<v8::Value>& args, ErrorThrower* thrower) { |
| i::Handle<i::Object> arg0 = Utils::OpenHandle(*args[0]); |
| if (!arg0->IsWasmModuleObject()) { |
| thrower->TypeError("Argument 0 must be a WebAssembly.Module"); |
| return {}; |
| } |
| |
| Local<Object> module_obj = Local<Object>::Cast(args[0]); |
| return i::Handle<i::WasmModuleObject>::cast( |
| v8::Utils::OpenHandle(*module_obj)); |
| } |
| |
| i::wasm::ModuleWireBytes GetFirstArgumentAsBytes( |
| const v8::FunctionCallbackInfo<v8::Value>& args, ErrorThrower* thrower, |
| bool* is_shared) { |
| const uint8_t* start = nullptr; |
| size_t length = 0; |
| v8::Local<v8::Value> source = args[0]; |
| if (source->IsArrayBuffer()) { |
| // A raw array buffer was passed. |
| Local<ArrayBuffer> buffer = Local<ArrayBuffer>::Cast(source); |
| ArrayBuffer::Contents contents = buffer->GetContents(); |
| |
| start = reinterpret_cast<const uint8_t*>(contents.Data()); |
| length = contents.ByteLength(); |
| *is_shared = buffer->IsSharedArrayBuffer(); |
| } else if (source->IsTypedArray()) { |
| // A TypedArray was passed. |
| Local<TypedArray> array = Local<TypedArray>::Cast(source); |
| Local<ArrayBuffer> buffer = array->Buffer(); |
| |
| ArrayBuffer::Contents contents = buffer->GetContents(); |
| |
| start = |
| reinterpret_cast<const uint8_t*>(contents.Data()) + array->ByteOffset(); |
| length = array->ByteLength(); |
| *is_shared = buffer->IsSharedArrayBuffer(); |
| } else { |
| thrower->TypeError("Argument 0 must be a buffer source"); |
| } |
| DCHECK_IMPLIES(length, start != nullptr); |
| if (length == 0) { |
| thrower->CompileError("BufferSource argument is empty"); |
| } |
| if (length > i::wasm::kV8MaxWasmModuleSize) { |
| thrower->RangeError("buffer source exceeds maximum size of %zu (is %zu)", |
| i::wasm::kV8MaxWasmModuleSize, length); |
| } |
| if (thrower->error()) return i::wasm::ModuleWireBytes(nullptr, nullptr); |
| return i::wasm::ModuleWireBytes(start, start + length); |
| } |
| |
| i::MaybeHandle<i::JSReceiver> GetValueAsImports(Local<Value> arg, |
| ErrorThrower* thrower) { |
| if (arg->IsUndefined()) return {}; |
| |
| if (!arg->IsObject()) { |
| thrower->TypeError("Argument 1 must be an object"); |
| return {}; |
| } |
| Local<Object> obj = Local<Object>::Cast(arg); |
| return i::Handle<i::JSReceiver>::cast(v8::Utils::OpenHandle(*obj)); |
| } |
| |
| namespace { |
| // This class resolves the result of WebAssembly.compile. It just places the |
| // compilation result in the supplied {promise}. |
| class AsyncCompilationResolver : public i::wasm::CompilationResultResolver { |
| public: |
| AsyncCompilationResolver(i::Isolate* isolate, i::Handle<i::JSPromise> promise) |
| : promise_(isolate->global_handles()->Create(*promise)) { |
| i::GlobalHandles::AnnotateStrongRetainer(promise_.location(), |
| kGlobalPromiseHandle); |
| } |
| |
| ~AsyncCompilationResolver() override { |
| i::GlobalHandles::Destroy(promise_.location()); |
| } |
| |
| void OnCompilationSucceeded(i::Handle<i::WasmModuleObject> result) override { |
| if (finished_) return; |
| finished_ = true; |
| i::MaybeHandle<i::Object> promise_result = |
| i::JSPromise::Resolve(promise_, result); |
| CHECK_EQ(promise_result.is_null(), |
| promise_->GetIsolate()->has_pending_exception()); |
| } |
| |
| void OnCompilationFailed(i::Handle<i::Object> error_reason) override { |
| if (finished_) return; |
| finished_ = true; |
| i::MaybeHandle<i::Object> promise_result = |
| i::JSPromise::Reject(promise_, error_reason); |
| CHECK_EQ(promise_result.is_null(), |
| promise_->GetIsolate()->has_pending_exception()); |
| } |
| |
| private: |
| static constexpr char kGlobalPromiseHandle[] = |
| "AsyncCompilationResolver::promise_"; |
| bool finished_ = false; |
| i::Handle<i::JSPromise> promise_; |
| }; |
| |
| constexpr char AsyncCompilationResolver::kGlobalPromiseHandle[]; |
| |
| // This class resolves the result of WebAssembly.instantiate(module, imports). |
| // It just places the instantiation result in the supplied {promise}. |
| class InstantiateModuleResultResolver |
| : public i::wasm::InstantiationResultResolver { |
| public: |
| InstantiateModuleResultResolver(i::Isolate* isolate, |
| i::Handle<i::JSPromise> promise) |
| : promise_(isolate->global_handles()->Create(*promise)) { |
| i::GlobalHandles::AnnotateStrongRetainer(promise_.location(), |
| kGlobalPromiseHandle); |
| } |
| |
| ~InstantiateModuleResultResolver() override { |
| i::GlobalHandles::Destroy(promise_.location()); |
| } |
| |
| void OnInstantiationSucceeded( |
| i::Handle<i::WasmInstanceObject> instance) override { |
| i::MaybeHandle<i::Object> promise_result = |
| i::JSPromise::Resolve(promise_, instance); |
| CHECK_EQ(promise_result.is_null(), |
| promise_->GetIsolate()->has_pending_exception()); |
| } |
| |
| void OnInstantiationFailed(i::Handle<i::Object> error_reason) override { |
| i::MaybeHandle<i::Object> promise_result = |
| i::JSPromise::Reject(promise_, error_reason); |
| CHECK_EQ(promise_result.is_null(), |
| promise_->GetIsolate()->has_pending_exception()); |
| } |
| |
| private: |
| static constexpr char kGlobalPromiseHandle[] = |
| "InstantiateModuleResultResolver::promise_"; |
| i::Handle<i::JSPromise> promise_; |
| }; |
| |
| constexpr char InstantiateModuleResultResolver::kGlobalPromiseHandle[]; |
| |
| // This class resolves the result of WebAssembly.instantiate(bytes, imports). |
| // For that it creates a new {JSObject} which contains both the provided |
| // {WasmModuleObject} and the resulting {WebAssemblyInstanceObject} itself. |
| class InstantiateBytesResultResolver |
| : public i::wasm::InstantiationResultResolver { |
| public: |
| InstantiateBytesResultResolver(i::Isolate* isolate, |
| i::Handle<i::JSPromise> promise, |
| i::Handle<i::WasmModuleObject> module) |
| : isolate_(isolate), |
| promise_(isolate_->global_handles()->Create(*promise)), |
| module_(isolate_->global_handles()->Create(*module)) { |
| i::GlobalHandles::AnnotateStrongRetainer(promise_.location(), |
| kGlobalPromiseHandle); |
| i::GlobalHandles::AnnotateStrongRetainer(module_.location(), |
| kGlobalModuleHandle); |
| } |
| |
| ~InstantiateBytesResultResolver() override { |
| i::GlobalHandles::Destroy(promise_.location()); |
| i::GlobalHandles::Destroy(module_.location()); |
| } |
| |
| void OnInstantiationSucceeded( |
| i::Handle<i::WasmInstanceObject> instance) override { |
| // The result is a JSObject with 2 fields which contain the |
| // WasmInstanceObject and the WasmModuleObject. |
| i::Handle<i::JSObject> result = |
| isolate_->factory()->NewJSObject(isolate_->object_function()); |
| |
| const uint8_t* instance_str = reinterpret_cast<const uint8_t*>("instance"); |
| i::Handle<i::String> instance_name = |
| isolate_->factory() |
| ->NewStringFromOneByte(i::Vector<const uint8_t>( |
| instance_str, |
| i::StrLength(reinterpret_cast<const char*>(instance_str)))) |
| .ToHandleChecked(); |
| |
| const uint8_t* module_str = reinterpret_cast<const uint8_t*>("module"); |
| i::Handle<i::String> module_name = |
| isolate_->factory() |
| ->NewStringFromOneByte(i::Vector<const uint8_t>( |
| module_str, |
| i::StrLength(reinterpret_cast<const char*>(module_str)))) |
| .ToHandleChecked(); |
| |
| i::JSObject::AddProperty(isolate_, result, instance_name, instance, |
| i::NONE); |
| i::JSObject::AddProperty(isolate_, result, module_name, module_, i::NONE); |
| |
| i::MaybeHandle<i::Object> promise_result = |
| i::JSPromise::Resolve(promise_, result); |
| CHECK_EQ(promise_result.is_null(), isolate_->has_pending_exception()); |
| } |
| |
| void OnInstantiationFailed(i::Handle<i::Object> error_reason) override { |
| i::MaybeHandle<i::Object> promise_result = |
| i::JSPromise::Reject(promise_, error_reason); |
| CHECK_EQ(promise_result.is_null(), isolate_->has_pending_exception()); |
| } |
| |
| private: |
| static constexpr char kGlobalPromiseHandle[] = |
| "InstantiateBytesResultResolver::promise_"; |
| static constexpr char kGlobalModuleHandle[] = |
| "InstantiateBytesResultResolver::module_"; |
| i::Isolate* isolate_; |
| i::Handle<i::JSPromise> promise_; |
| i::Handle<i::WasmModuleObject> module_; |
| }; |
| |
| constexpr char InstantiateBytesResultResolver::kGlobalPromiseHandle[]; |
| constexpr char InstantiateBytesResultResolver::kGlobalModuleHandle[]; |
| |
| // This class is the {CompilationResultResolver} for |
| // WebAssembly.instantiate(bytes, imports). When compilation finishes, |
| // {AsyncInstantiate} is started on the compilation result. |
| class AsyncInstantiateCompileResultResolver |
| : public i::wasm::CompilationResultResolver { |
| public: |
| AsyncInstantiateCompileResultResolver( |
| i::Isolate* isolate, i::Handle<i::JSPromise> promise, |
| i::MaybeHandle<i::JSReceiver> maybe_imports) |
| : isolate_(isolate), |
| promise_(isolate_->global_handles()->Create(*promise)), |
| maybe_imports_(maybe_imports.is_null() |
| ? maybe_imports |
| : isolate_->global_handles()->Create( |
| *maybe_imports.ToHandleChecked())) { |
| i::GlobalHandles::AnnotateStrongRetainer(promise_.location(), |
| kGlobalPromiseHandle); |
| if (!maybe_imports_.is_null()) { |
| i::GlobalHandles::AnnotateStrongRetainer( |
| maybe_imports_.ToHandleChecked().location(), kGlobalImportsHandle); |
| } |
| } |
| |
| ~AsyncInstantiateCompileResultResolver() override { |
| i::GlobalHandles::Destroy(promise_.location()); |
| if (!maybe_imports_.is_null()) { |
| i::GlobalHandles::Destroy(maybe_imports_.ToHandleChecked().location()); |
| } |
| } |
| |
| void OnCompilationSucceeded(i::Handle<i::WasmModuleObject> result) override { |
| if (finished_) return; |
| finished_ = true; |
| isolate_->wasm_engine()->AsyncInstantiate( |
| isolate_, |
| base::make_unique<InstantiateBytesResultResolver>(isolate_, promise_, |
| result), |
| result, maybe_imports_); |
| } |
| |
| void OnCompilationFailed(i::Handle<i::Object> error_reason) override { |
| if (finished_) return; |
| finished_ = true; |
| i::MaybeHandle<i::Object> promise_result = |
| i::JSPromise::Reject(promise_, error_reason); |
| CHECK_EQ(promise_result.is_null(), isolate_->has_pending_exception()); |
| } |
| |
| private: |
| static constexpr char kGlobalPromiseHandle[] = |
| "AsyncInstantiateCompileResultResolver::promise_"; |
| static constexpr char kGlobalImportsHandle[] = |
| "AsyncInstantiateCompileResultResolver::module_"; |
| bool finished_ = false; |
| i::Isolate* isolate_; |
| i::Handle<i::JSPromise> promise_; |
| i::MaybeHandle<i::JSReceiver> maybe_imports_; |
| }; |
| |
| constexpr char AsyncInstantiateCompileResultResolver::kGlobalPromiseHandle[]; |
| constexpr char AsyncInstantiateCompileResultResolver::kGlobalImportsHandle[]; |
| } // namespace |
| |
| // Web IDL: '[EnforceRange] unsigned long' |
| // Previously called ToNonWrappingUint32 in the draft WebAssembly JS spec. |
| // https://heycam.github.io/webidl/#EnforceRange |
| bool EnforceUint32(i::Handle<i::String> argument_name, Local<v8::Value> v, |
| Local<Context> context, ErrorThrower* thrower, |
| uint32_t* res) { |
| double double_number; |
| |
| if (!v->NumberValue(context).To(&double_number)) { |
| thrower->TypeError("Property '%s' must be convertible to a number", |
| argument_name->ToCString().get()); |
| return false; |
| } |
| if (!std::isfinite(double_number)) { |
| thrower->TypeError("Property '%s' must be convertible to a valid number", |
| argument_name->ToCString().get()); |
| return false; |
| } |
| if (double_number < 0) { |
| thrower->TypeError("Property '%s' must be non-negative", |
| argument_name->ToCString().get()); |
| return false; |
| } |
| if (double_number > std::numeric_limits<uint32_t>::max()) { |
| thrower->TypeError("Property '%s' must be in the unsigned long range", |
| argument_name->ToCString().get()); |
| return false; |
| } |
| |
| *res = static_cast<uint32_t>(double_number); |
| return true; |
| } |
| |
| // WebAssembly.compile(bytes) -> Promise |
| void WebAssemblyCompile(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.compile()"); |
| |
| if (!i::wasm::IsWasmCodegenAllowed(i_isolate, i_isolate->native_context())) { |
| thrower.CompileError("Wasm code generation disallowed by embedder"); |
| } |
| |
| Local<Context> context = isolate->GetCurrentContext(); |
| ASSIGN(Promise::Resolver, promise_resolver, Promise::Resolver::New(context)); |
| Local<Promise> promise = promise_resolver->GetPromise(); |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| return_value.Set(promise); |
| |
| std::shared_ptr<i::wasm::CompilationResultResolver> resolver( |
| new AsyncCompilationResolver(i_isolate, Utils::OpenHandle(*promise))); |
| |
| bool is_shared = false; |
| auto bytes = GetFirstArgumentAsBytes(args, &thrower, &is_shared); |
| if (thrower.error()) { |
| resolver->OnCompilationFailed(thrower.Reify()); |
| return; |
| } |
| // Asynchronous compilation handles copying wire bytes if necessary. |
| auto enabled_features = i::wasm::WasmFeaturesFromIsolate(i_isolate); |
| i_isolate->wasm_engine()->AsyncCompile(i_isolate, enabled_features, |
| std::move(resolver), bytes, is_shared); |
| } |
| |
| // WebAssembly.compileStreaming(Promise<Response>) -> Promise |
| void WebAssemblyCompileStreaming( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.compile()"); |
| Local<Context> context = isolate->GetCurrentContext(); |
| |
| // Create and assign the return value of this function. |
| ASSIGN(Promise::Resolver, result_resolver, Promise::Resolver::New(context)); |
| Local<Promise> promise = result_resolver->GetPromise(); |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| return_value.Set(promise); |
| |
| // Prepare the CompilationResultResolver for the compilation. |
| auto resolver = std::make_shared<AsyncCompilationResolver>( |
| i_isolate, Utils::OpenHandle(*promise)); |
| |
| if (!i::wasm::IsWasmCodegenAllowed(i_isolate, i_isolate->native_context())) { |
| thrower.CompileError("Wasm code generation disallowed by embedder"); |
| resolver->OnCompilationFailed(thrower.Reify()); |
| return; |
| } |
| |
| // Allocate the streaming decoder in a Managed so we can pass it to the |
| // embedder. |
| i::Handle<i::Managed<WasmStreaming>> data = |
| i::Managed<WasmStreaming>::Allocate( |
| i_isolate, 0, |
| base::make_unique<WasmStreaming::WasmStreamingImpl>(isolate, |
| resolver)); |
| |
| DCHECK_NOT_NULL(i_isolate->wasm_streaming_callback()); |
| ASSIGN( |
| v8::Function, compile_callback, |
| v8::Function::New(context, i_isolate->wasm_streaming_callback(), |
| Utils::ToLocal(i::Handle<i::Object>::cast(data)), 1)); |
| |
| // The parameter may be of type {Response} or of type {Promise<Response>}. |
| // Treat either case of parameter as Promise.resolve(parameter) |
| // as per https://www.w3.org/2001/tag/doc/promises-guide#resolve-arguments |
| |
| // Ending with: |
| // return Promise.resolve(parameter).then(compile_callback); |
| ASSIGN(Promise::Resolver, input_resolver, Promise::Resolver::New(context)); |
| if (!input_resolver->Resolve(context, args[0]).IsJust()) return; |
| |
| // We do not have any use of the result here. The {compile_callback} will |
| // start streaming compilation, which will eventually resolve the promise we |
| // set as result value. |
| USE(input_resolver->GetPromise()->Then(context, compile_callback)); |
| } |
| |
| // WebAssembly.validate(bytes) -> bool |
| void WebAssemblyValidate(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.validate()"); |
| |
| bool is_shared = false; |
| auto bytes = GetFirstArgumentAsBytes(args, &thrower, &is_shared); |
| |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| |
| if (thrower.error()) { |
| if (thrower.wasm_error()) thrower.Reset(); // Clear error. |
| return_value.Set(v8::False(isolate)); |
| return; |
| } |
| |
| auto enabled_features = i::wasm::WasmFeaturesFromIsolate(i_isolate); |
| bool validated = false; |
| if (is_shared) { |
| // Make a copy of the wire bytes to avoid concurrent modification. |
| std::unique_ptr<uint8_t[]> copy(new uint8_t[bytes.length()]); |
| memcpy(copy.get(), bytes.start(), bytes.length()); |
| i::wasm::ModuleWireBytes bytes_copy(copy.get(), |
| copy.get() + bytes.length()); |
| validated = i_isolate->wasm_engine()->SyncValidate( |
| i_isolate, enabled_features, bytes_copy); |
| } else { |
| // The wire bytes are not shared, OK to use them directly. |
| validated = i_isolate->wasm_engine()->SyncValidate(i_isolate, |
| enabled_features, bytes); |
| } |
| |
| return_value.Set(Boolean::New(isolate, validated)); |
| } |
| |
| // new WebAssembly.Module(bytes) -> WebAssembly.Module |
| void WebAssemblyModule(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| if (i_isolate->wasm_module_callback()(args)) return; |
| |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Module()"); |
| |
| if (!args.IsConstructCall()) { |
| thrower.TypeError("WebAssembly.Module must be invoked with 'new'"); |
| return; |
| } |
| if (!i::wasm::IsWasmCodegenAllowed(i_isolate, i_isolate->native_context())) { |
| thrower.CompileError("Wasm code generation disallowed by embedder"); |
| return; |
| } |
| |
| bool is_shared = false; |
| auto bytes = GetFirstArgumentAsBytes(args, &thrower, &is_shared); |
| |
| if (thrower.error()) { |
| return; |
| } |
| auto enabled_features = i::wasm::WasmFeaturesFromIsolate(i_isolate); |
| i::MaybeHandle<i::Object> module_obj; |
| if (is_shared) { |
| // Make a copy of the wire bytes to avoid concurrent modification. |
| std::unique_ptr<uint8_t[]> copy(new uint8_t[bytes.length()]); |
| memcpy(copy.get(), bytes.start(), bytes.length()); |
| i::wasm::ModuleWireBytes bytes_copy(copy.get(), |
| copy.get() + bytes.length()); |
| module_obj = i_isolate->wasm_engine()->SyncCompile( |
| i_isolate, enabled_features, &thrower, bytes_copy); |
| } else { |
| // The wire bytes are not shared, OK to use them directly. |
| module_obj = i_isolate->wasm_engine()->SyncCompile( |
| i_isolate, enabled_features, &thrower, bytes); |
| } |
| |
| if (module_obj.is_null()) return; |
| |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| return_value.Set(Utils::ToLocal(module_obj.ToHandleChecked())); |
| } |
| |
| // WebAssembly.Module.imports(module) -> Array<Import> |
| void WebAssemblyModuleImports(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| HandleScope scope(args.GetIsolate()); |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Module.imports()"); |
| |
| auto maybe_module = GetFirstArgumentAsModule(args, &thrower); |
| if (thrower.error()) return; |
| auto imports = i::wasm::GetImports(i_isolate, maybe_module.ToHandleChecked()); |
| args.GetReturnValue().Set(Utils::ToLocal(imports)); |
| } |
| |
| // WebAssembly.Module.exports(module) -> Array<Export> |
| void WebAssemblyModuleExports(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| HandleScope scope(args.GetIsolate()); |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Module.exports()"); |
| |
| auto maybe_module = GetFirstArgumentAsModule(args, &thrower); |
| if (thrower.error()) return; |
| auto exports = i::wasm::GetExports(i_isolate, maybe_module.ToHandleChecked()); |
| args.GetReturnValue().Set(Utils::ToLocal(exports)); |
| } |
| |
| // WebAssembly.Module.customSections(module, name) -> Array<Section> |
| void WebAssemblyModuleCustomSections( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| HandleScope scope(args.GetIsolate()); |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| ScheduledErrorThrower thrower(i_isolate, |
| "WebAssembly.Module.customSections()"); |
| |
| auto maybe_module = GetFirstArgumentAsModule(args, &thrower); |
| if (thrower.error()) return; |
| |
| i::MaybeHandle<i::Object> maybe_name = |
| i::Object::ToString(i_isolate, Utils::OpenHandle(*args[1])); |
| i::Handle<i::Object> name; |
| if (!maybe_name.ToHandle(&name)) return; |
| auto custom_sections = |
| i::wasm::GetCustomSections(i_isolate, maybe_module.ToHandleChecked(), |
| i::Handle<i::String>::cast(name), &thrower); |
| if (thrower.error()) return; |
| args.GetReturnValue().Set(Utils::ToLocal(custom_sections)); |
| } |
| |
| MaybeLocal<Value> WebAssemblyInstantiateImpl(Isolate* isolate, |
| Local<Value> module, |
| Local<Value> ffi) { |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| |
| i::MaybeHandle<i::Object> instance_object; |
| { |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly Instantiation"); |
| |
| // TODO(ahaas): These checks on the module should not be necessary here They |
| // are just a workaround for https://crbug.com/837417. |
| i::Handle<i::Object> module_obj = Utils::OpenHandle(*module); |
| if (!module_obj->IsWasmModuleObject()) { |
| thrower.TypeError("Argument 0 must be a WebAssembly.Module object"); |
| return {}; |
| } |
| |
| i::MaybeHandle<i::JSReceiver> maybe_imports = |
| GetValueAsImports(ffi, &thrower); |
| if (thrower.error()) return {}; |
| |
| instance_object = i_isolate->wasm_engine()->SyncInstantiate( |
| i_isolate, &thrower, i::Handle<i::WasmModuleObject>::cast(module_obj), |
| maybe_imports, i::MaybeHandle<i::JSArrayBuffer>()); |
| } |
| |
| DCHECK_EQ(instance_object.is_null(), i_isolate->has_scheduled_exception()); |
| if (instance_object.is_null()) return {}; |
| return Utils::ToLocal(instance_object.ToHandleChecked()); |
| } |
| |
| // new WebAssembly.Instance(module, imports) -> WebAssembly.Instance |
| void WebAssemblyInstance(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| i_isolate->CountUsage( |
| v8::Isolate::UseCounterFeature::kWebAssemblyInstantiation); |
| |
| HandleScope scope(args.GetIsolate()); |
| if (i_isolate->wasm_instance_callback()(args)) return; |
| |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Instance()"); |
| if (!args.IsConstructCall()) { |
| thrower.TypeError("WebAssembly.Instance must be invoked with 'new'"); |
| return; |
| } |
| |
| GetFirstArgumentAsModule(args, &thrower); |
| if (thrower.error()) return; |
| |
| // If args.Length < 2, this will be undefined - see FunctionCallbackInfo. |
| // We'll check for that in WebAssemblyInstantiateImpl. |
| Local<Value> data = args[1]; |
| |
| Local<Value> instance; |
| if (WebAssemblyInstantiateImpl(isolate, args[0], data).ToLocal(&instance)) { |
| args.GetReturnValue().Set(instance); |
| } |
| } |
| |
| void WebAssemblyInstantiateStreaming( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| i_isolate->CountUsage( |
| v8::Isolate::UseCounterFeature::kWebAssemblyInstantiation); |
| |
| HandleScope scope(isolate); |
| Local<Context> context = isolate->GetCurrentContext(); |
| ScheduledErrorThrower thrower(i_isolate, |
| "WebAssembly.instantiateStreaming()"); |
| |
| // Create and assign the return value of this function. |
| ASSIGN(Promise::Resolver, result_resolver, Promise::Resolver::New(context)); |
| Local<Promise> promise = result_resolver->GetPromise(); |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| return_value.Set(promise); |
| |
| // Create an InstantiateResultResolver in case there is an issue with the |
| // passed parameters. |
| std::unique_ptr<i::wasm::InstantiationResultResolver> resolver( |
| new InstantiateModuleResultResolver(i_isolate, |
| Utils::OpenHandle(*promise))); |
| |
| if (!i::wasm::IsWasmCodegenAllowed(i_isolate, i_isolate->native_context())) { |
| thrower.CompileError("Wasm code generation disallowed by embedder"); |
| resolver->OnInstantiationFailed(thrower.Reify()); |
| return; |
| } |
| |
| // If args.Length < 2, this will be undefined - see FunctionCallbackInfo. |
| Local<Value> ffi = args[1]; |
| i::MaybeHandle<i::JSReceiver> maybe_imports = |
| GetValueAsImports(ffi, &thrower); |
| |
| if (thrower.error()) { |
| resolver->OnInstantiationFailed(thrower.Reify()); |
| return; |
| } |
| |
| // We start compilation now, we have no use for the |
| // {InstantiationResultResolver}. |
| resolver.reset(); |
| |
| std::shared_ptr<i::wasm::CompilationResultResolver> compilation_resolver( |
| new AsyncInstantiateCompileResultResolver( |
| i_isolate, Utils::OpenHandle(*promise), maybe_imports)); |
| |
| // Allocate the streaming decoder in a Managed so we can pass it to the |
| // embedder. |
| i::Handle<i::Managed<WasmStreaming>> data = |
| i::Managed<WasmStreaming>::Allocate( |
| i_isolate, 0, |
| base::make_unique<WasmStreaming::WasmStreamingImpl>( |
| isolate, compilation_resolver)); |
| |
| DCHECK_NOT_NULL(i_isolate->wasm_streaming_callback()); |
| ASSIGN( |
| v8::Function, compile_callback, |
| v8::Function::New(context, i_isolate->wasm_streaming_callback(), |
| Utils::ToLocal(i::Handle<i::Object>::cast(data)), 1)); |
| |
| // The parameter may be of type {Response} or of type {Promise<Response>}. |
| // Treat either case of parameter as Promise.resolve(parameter) |
| // as per https://www.w3.org/2001/tag/doc/promises-guide#resolve-arguments |
| |
| // Ending with: |
| // return Promise.resolve(parameter).then(compile_callback); |
| ASSIGN(Promise::Resolver, input_resolver, Promise::Resolver::New(context)); |
| if (!input_resolver->Resolve(context, args[0]).IsJust()) return; |
| |
| // We do not have any use of the result here. The {compile_callback} will |
| // start streaming compilation, which will eventually resolve the promise we |
| // set as result value. |
| USE(input_resolver->GetPromise()->Then(context, compile_callback)); |
| } |
| |
| // WebAssembly.instantiate(module, imports) -> WebAssembly.Instance |
| // WebAssembly.instantiate(bytes, imports) -> |
| // {module: WebAssembly.Module, instance: WebAssembly.Instance} |
| void WebAssemblyInstantiate(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| i_isolate->CountUsage( |
| v8::Isolate::UseCounterFeature::kWebAssemblyInstantiation); |
| |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly Instantiation"); |
| |
| HandleScope scope(isolate); |
| |
| Local<Context> context = isolate->GetCurrentContext(); |
| |
| ASSIGN(Promise::Resolver, promise_resolver, Promise::Resolver::New(context)); |
| Local<Promise> promise = promise_resolver->GetPromise(); |
| args.GetReturnValue().Set(promise); |
| |
| std::unique_ptr<i::wasm::InstantiationResultResolver> resolver( |
| new InstantiateModuleResultResolver(i_isolate, |
| Utils::OpenHandle(*promise))); |
| |
| Local<Value> first_arg_value = args[0]; |
| i::Handle<i::Object> first_arg = Utils::OpenHandle(*first_arg_value); |
| if (!first_arg->IsJSObject()) { |
| thrower.TypeError( |
| "Argument 0 must be a buffer source or a WebAssembly.Module object"); |
| resolver->OnInstantiationFailed(thrower.Reify()); |
| return; |
| } |
| |
| // If args.Length < 2, this will be undefined - see FunctionCallbackInfo. |
| Local<Value> ffi = args[1]; |
| i::MaybeHandle<i::JSReceiver> maybe_imports = |
| GetValueAsImports(ffi, &thrower); |
| |
| if (thrower.error()) { |
| resolver->OnInstantiationFailed(thrower.Reify()); |
| return; |
| } |
| |
| if (first_arg->IsWasmModuleObject()) { |
| i::Handle<i::WasmModuleObject> module_obj = |
| i::Handle<i::WasmModuleObject>::cast(first_arg); |
| |
| i_isolate->wasm_engine()->AsyncInstantiate(i_isolate, std::move(resolver), |
| module_obj, maybe_imports); |
| return; |
| } |
| |
| bool is_shared = false; |
| auto bytes = GetFirstArgumentAsBytes(args, &thrower, &is_shared); |
| if (thrower.error()) { |
| resolver->OnInstantiationFailed(thrower.Reify()); |
| return; |
| } |
| |
| // We start compilation now, we have no use for the |
| // {InstantiationResultResolver}. |
| resolver.reset(); |
| |
| std::shared_ptr<i::wasm::CompilationResultResolver> compilation_resolver( |
| new AsyncInstantiateCompileResultResolver( |
| i_isolate, Utils::OpenHandle(*promise), maybe_imports)); |
| |
| // The first parameter is a buffer source, we have to check if we are allowed |
| // to compile it. |
| if (!i::wasm::IsWasmCodegenAllowed(i_isolate, i_isolate->native_context())) { |
| thrower.CompileError("Wasm code generation disallowed by embedder"); |
| compilation_resolver->OnCompilationFailed(thrower.Reify()); |
| return; |
| } |
| |
| // Asynchronous compilation handles copying wire bytes if necessary. |
| auto enabled_features = i::wasm::WasmFeaturesFromIsolate(i_isolate); |
| i_isolate->wasm_engine()->AsyncCompile(i_isolate, enabled_features, |
| std::move(compilation_resolver), bytes, |
| is_shared); |
| } |
| |
| bool GetIntegerProperty(v8::Isolate* isolate, ErrorThrower* thrower, |
| Local<Context> context, v8::Local<v8::Value> value, |
| i::Handle<i::String> property_name, int64_t* result, |
| int64_t lower_bound, uint64_t upper_bound) { |
| uint32_t number; |
| if (!EnforceUint32(property_name, value, context, thrower, &number)) { |
| return false; |
| } |
| if (number < lower_bound) { |
| thrower->RangeError("Property '%s': value %" PRIu32 |
| " is below the lower bound %" PRIx64, |
| property_name->ToCString().get(), number, lower_bound); |
| return false; |
| } |
| if (number > upper_bound) { |
| thrower->RangeError("Property '%s': value %" PRIu32 |
| " is above the upper bound %" PRIu64, |
| property_name->ToCString().get(), number, upper_bound); |
| return false; |
| } |
| |
| *result = static_cast<int64_t>(number); |
| return true; |
| } |
| |
| bool GetRequiredIntegerProperty(v8::Isolate* isolate, ErrorThrower* thrower, |
| Local<Context> context, |
| Local<v8::Object> object, |
| Local<String> property, int64_t* result, |
| int64_t lower_bound, uint64_t upper_bound) { |
| v8::Local<v8::Value> value; |
| if (!object->Get(context, property).ToLocal(&value)) { |
| return false; |
| } |
| |
| i::Handle<i::String> property_name = v8::Utils::OpenHandle(*property); |
| |
| // Web IDL: dictionary presence |
| // https://heycam.github.io/webidl/#dfn-present |
| if (value->IsUndefined()) { |
| thrower->TypeError("Property '%s' is required", |
| property_name->ToCString().get()); |
| return false; |
| } |
| |
| return GetIntegerProperty(isolate, thrower, context, value, property_name, |
| result, lower_bound, upper_bound); |
| } |
| |
| bool GetOptionalIntegerProperty(v8::Isolate* isolate, ErrorThrower* thrower, |
| Local<Context> context, |
| Local<v8::Object> object, |
| Local<String> property, int64_t* result, |
| int64_t lower_bound, uint64_t upper_bound) { |
| v8::Local<v8::Value> value; |
| if (!object->Get(context, property).ToLocal(&value)) { |
| return false; |
| } |
| |
| // Web IDL: dictionary presence |
| // https://heycam.github.io/webidl/#dfn-present |
| if (value->IsUndefined()) { |
| return true; |
| } |
| |
| i::Handle<i::String> property_name = v8::Utils::OpenHandle(*property); |
| |
| return GetIntegerProperty(isolate, thrower, context, value, property_name, |
| result, lower_bound, upper_bound); |
| } |
| |
| // new WebAssembly.Table(args) -> WebAssembly.Table |
| void WebAssemblyTable(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Module()"); |
| if (!args.IsConstructCall()) { |
| thrower.TypeError("WebAssembly.Table must be invoked with 'new'"); |
| return; |
| } |
| if (!args[0]->IsObject()) { |
| thrower.TypeError("Argument 0 must be a table descriptor"); |
| return; |
| } |
| Local<Context> context = isolate->GetCurrentContext(); |
| Local<v8::Object> descriptor = Local<Object>::Cast(args[0]); |
| // The descriptor's 'element'. |
| { |
| v8::MaybeLocal<v8::Value> maybe = |
| descriptor->Get(context, v8_str(isolate, "element")); |
| v8::Local<v8::Value> value; |
| if (!maybe.ToLocal(&value)) return; |
| v8::Local<v8::String> string; |
| if (!value->ToString(context).ToLocal(&string)) return; |
| if (!string->StringEquals(v8_str(isolate, "anyfunc"))) { |
| thrower.TypeError("Descriptor property 'element' must be 'anyfunc'"); |
| return; |
| } |
| } |
| // The descriptor's 'initial'. |
| int64_t initial = 0; |
| if (!GetRequiredIntegerProperty(isolate, &thrower, context, descriptor, |
| v8_str(isolate, "initial"), &initial, 0, |
| i::FLAG_wasm_max_table_size)) { |
| return; |
| } |
| // The descriptor's 'maximum'. |
| int64_t maximum = -1; |
| if (!GetOptionalIntegerProperty(isolate, &thrower, context, descriptor, |
| v8_str(isolate, "maximum"), &maximum, initial, |
| i::wasm::kSpecMaxWasmTableSize)) { |
| return; |
| } |
| |
| i::Handle<i::FixedArray> fixed_array; |
| i::Handle<i::JSObject> table_obj = |
| i::WasmTableObject::New(i_isolate, static_cast<uint32_t>(initial), |
| static_cast<uint32_t>(maximum), &fixed_array); |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| return_value.Set(Utils::ToLocal(table_obj)); |
| } |
| |
| void WebAssemblyMemory(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Memory()"); |
| if (!args.IsConstructCall()) { |
| thrower.TypeError("WebAssembly.Memory must be invoked with 'new'"); |
| return; |
| } |
| if (!args[0]->IsObject()) { |
| thrower.TypeError("Argument 0 must be a memory descriptor"); |
| return; |
| } |
| Local<Context> context = isolate->GetCurrentContext(); |
| Local<v8::Object> descriptor = Local<Object>::Cast(args[0]); |
| // The descriptor's 'initial'. |
| int64_t initial = 0; |
| if (!GetRequiredIntegerProperty(isolate, &thrower, context, descriptor, |
| v8_str(isolate, "initial"), &initial, 0, |
| i::wasm::max_mem_pages())) { |
| return; |
| } |
| // The descriptor's 'maximum'. |
| int64_t maximum = -1; |
| if (!GetOptionalIntegerProperty(isolate, &thrower, context, descriptor, |
| v8_str(isolate, "maximum"), &maximum, initial, |
| i::wasm::kSpecMaxWasmMemoryPages)) { |
| return; |
| } |
| |
| bool is_shared_memory = false; |
| auto enabled_features = i::wasm::WasmFeaturesFromIsolate(i_isolate); |
| if (enabled_features.threads) { |
| // Shared property of descriptor |
| Local<String> shared_key = v8_str(isolate, "shared"); |
| Maybe<bool> has_shared = descriptor->Has(context, shared_key); |
| if (!has_shared.IsNothing() && has_shared.FromJust()) { |
| v8::MaybeLocal<v8::Value> maybe = descriptor->Get(context, shared_key); |
| v8::Local<v8::Value> value; |
| if (maybe.ToLocal(&value)) { |
| is_shared_memory = value->BooleanValue(isolate); |
| } |
| } |
| // Throw TypeError if shared is true, and the descriptor has no "maximum" |
| if (is_shared_memory && maximum == -1) { |
| thrower.TypeError( |
| "If shared is true, maximum property should be defined."); |
| } |
| } |
| |
| i::SharedFlag shared_flag = |
| is_shared_memory ? i::SharedFlag::kShared : i::SharedFlag::kNotShared; |
| i::Handle<i::JSArrayBuffer> buffer; |
| size_t size = static_cast<size_t>(i::wasm::kWasmPageSize) * |
| static_cast<size_t>(initial); |
| if (!i::wasm::NewArrayBuffer(i_isolate, size, shared_flag) |
| .ToHandle(&buffer)) { |
| thrower.RangeError("could not allocate memory"); |
| return; |
| } |
| if (buffer->is_shared()) { |
| Maybe<bool> result = |
| buffer->SetIntegrityLevel(buffer, i::FROZEN, i::kDontThrow); |
| if (!result.FromJust()) { |
| thrower.TypeError( |
| "Status of setting SetIntegrityLevel of buffer is false."); |
| } |
| } |
| i::Handle<i::JSObject> memory_obj = i::WasmMemoryObject::New( |
| i_isolate, buffer, static_cast<uint32_t>(maximum)); |
| args.GetReturnValue().Set(Utils::ToLocal(memory_obj)); |
| } |
| |
| void WebAssemblyGlobal(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Global()"); |
| if (!args.IsConstructCall()) { |
| thrower.TypeError("WebAssembly.Global must be invoked with 'new'"); |
| return; |
| } |
| if (!args[0]->IsObject()) { |
| thrower.TypeError("Argument 0 must be a global descriptor"); |
| return; |
| } |
| Local<Context> context = isolate->GetCurrentContext(); |
| Local<v8::Object> descriptor = Local<Object>::Cast(args[0]); |
| |
| // The descriptor's 'mutable'. |
| bool is_mutable = false; |
| { |
| Local<String> mutable_key = v8_str(isolate, "mutable"); |
| v8::MaybeLocal<v8::Value> maybe = descriptor->Get(context, mutable_key); |
| v8::Local<v8::Value> value; |
| if (maybe.ToLocal(&value)) { |
| is_mutable = value->BooleanValue(isolate); |
| } |
| } |
| |
| auto enabled_features = i::wasm::WasmFeaturesFromIsolate(i_isolate); |
| |
| // The descriptor's type, called 'value'. It is called 'value' because this |
| // descriptor is planned to be re-used as the global's type for reflection, |
| // so calling it 'type' is redundant. |
| i::wasm::ValueType type; |
| { |
| v8::MaybeLocal<v8::Value> maybe = |
| descriptor->Get(context, v8_str(isolate, "value")); |
| v8::Local<v8::Value> value; |
| if (!maybe.ToLocal(&value)) return; |
| v8::Local<v8::String> string; |
| if (!value->ToString(context).ToLocal(&string)) return; |
| |
| if (string->StringEquals(v8_str(isolate, "i32"))) { |
| type = i::wasm::kWasmI32; |
| } else if (string->StringEquals(v8_str(isolate, "f32"))) { |
| type = i::wasm::kWasmF32; |
| } else if (enabled_features.bigint && |
| string->StringEquals(v8_str(isolate, "i64"))) { |
| type = i::wasm::kWasmI64; |
| } else if (string->StringEquals(v8_str(isolate, "f64"))) { |
| type = i::wasm::kWasmF64; |
| } else { |
| if (enabled_features.bigint) { |
| thrower.TypeError( |
| "Descriptor property 'value' must be 'i32', 'i64', 'f32', or " |
| "'f64'"); |
| } else { |
| thrower.TypeError( |
| "Descriptor property 'value' must be 'i32', 'f32', or 'f64'"); |
| } |
| |
| return; |
| } |
| } |
| |
| const uint32_t offset = 0; |
| i::MaybeHandle<i::WasmGlobalObject> maybe_global_obj = |
| i::WasmGlobalObject::New(i_isolate, i::MaybeHandle<i::JSArrayBuffer>(), |
| type, offset, is_mutable); |
| |
| i::Handle<i::WasmGlobalObject> global_obj; |
| if (!maybe_global_obj.ToHandle(&global_obj)) { |
| thrower.RangeError("could not allocate memory"); |
| return; |
| } |
| |
| // Convert value to a WebAssembly value, the default value is 0. |
| Local<v8::Value> value = Local<Value>::Cast(args[1]); |
| switch (type) { |
| case i::wasm::kWasmI32: { |
| int32_t i32_value = 0; |
| if (!value->IsUndefined()) { |
| v8::Local<v8::Int32> int32_value; |
| if (!value->ToInt32(context).ToLocal(&int32_value)) return; |
| if (!int32_value->Int32Value(context).To(&i32_value)) return; |
| } |
| global_obj->SetI32(i32_value); |
| break; |
| } |
| case i::wasm::kWasmI64: { |
| DCHECK(enabled_features.bigint); |
| |
| int64_t i64_value = 0; |
| if (!value->IsUndefined()) { |
| v8::Local<v8::BigInt> bigint_value; |
| if (!value->ToBigInt(context).ToLocal(&bigint_value)) return; |
| i64_value = bigint_value->Int64Value(); |
| } |
| global_obj->SetI64(i64_value); |
| break; |
| } |
| case i::wasm::kWasmF32: { |
| float f32_value = 0; |
| if (!value->IsUndefined()) { |
| double f64_value = 0; |
| v8::Local<v8::Number> number_value; |
| if (!value->ToNumber(context).ToLocal(&number_value)) return; |
| if (!number_value->NumberValue(context).To(&f64_value)) return; |
| f32_value = static_cast<float>(f64_value); |
| } |
| global_obj->SetF32(f32_value); |
| break; |
| } |
| case i::wasm::kWasmF64: { |
| double f64_value = 0; |
| if (!value->IsUndefined()) { |
| v8::Local<v8::Number> number_value; |
| if (!value->ToNumber(context).ToLocal(&number_value)) return; |
| if (!number_value->NumberValue(context).To(&f64_value)) return; |
| } |
| global_obj->SetF64(f64_value); |
| break; |
| } |
| default: |
| UNREACHABLE(); |
| } |
| |
| i::Handle<i::JSObject> global_js_object(global_obj); |
| args.GetReturnValue().Set(Utils::ToLocal(global_js_object)); |
| } |
| |
| // WebAssembly.Exception |
| void WebAssemblyException(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Excepion()"); |
| thrower.TypeError("WebAssembly.Exception cannot be called"); |
| } |
| |
| constexpr const char* kName_WasmGlobalObject = "WebAssembly.Global"; |
| constexpr const char* kName_WasmMemoryObject = "WebAssembly.Memory"; |
| constexpr const char* kName_WasmInstanceObject = "WebAssembly.Instance"; |
| constexpr const char* kName_WasmTableObject = "WebAssembly.Table"; |
| |
| #define EXTRACT_THIS(var, WasmType) \ |
| i::Handle<i::WasmType> var; \ |
| { \ |
| i::Handle<i::Object> this_arg = Utils::OpenHandle(*args.This()); \ |
| if (!this_arg->Is##WasmType()) { \ |
| thrower.TypeError("Receiver is not a %s", kName_##WasmType); \ |
| return; \ |
| } \ |
| var = i::Handle<i::WasmType>::cast(this_arg); \ |
| } |
| |
| void WebAssemblyInstanceGetExports( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Instance.exports()"); |
| EXTRACT_THIS(receiver, WasmInstanceObject); |
| i::Handle<i::JSObject> exports_object(receiver->exports_object(), i_isolate); |
| args.GetReturnValue().Set(Utils::ToLocal(exports_object)); |
| } |
| |
| void WebAssemblyTableGetLength( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Table.length()"); |
| EXTRACT_THIS(receiver, WasmTableObject); |
| args.GetReturnValue().Set( |
| v8::Number::New(isolate, receiver->current_length())); |
| } |
| |
| // WebAssembly.Table.grow(num) -> num |
| void WebAssemblyTableGrow(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Table.grow()"); |
| Local<Context> context = isolate->GetCurrentContext(); |
| EXTRACT_THIS(receiver, WasmTableObject); |
| |
| int64_t grow_by = 0; |
| if (!args[0]->IntegerValue(context).To(&grow_by)) return; |
| i::Handle<i::FixedArray> old_array(receiver->functions(), i_isolate); |
| int old_size = old_array->length(); |
| |
| int64_t max_size64 = receiver->maximum_length()->Number(); |
| if (max_size64 < 0 || max_size64 > i::FLAG_wasm_max_table_size) { |
| max_size64 = i::FLAG_wasm_max_table_size; |
| } |
| |
| if (grow_by < 0 || grow_by > max_size64 - old_size) { |
| thrower.RangeError(grow_by < 0 ? "trying to shrink table" |
| : "maximum table size exceeded"); |
| return; |
| } |
| |
| int new_size = static_cast<int>(old_size + grow_by); |
| receiver->Grow(i_isolate, static_cast<uint32_t>(new_size - old_size)); |
| |
| if (new_size != old_size) { |
| i::Handle<i::FixedArray> new_array = |
| i_isolate->factory()->NewFixedArray(new_size); |
| for (int i = 0; i < old_size; ++i) new_array->set(i, old_array->get(i)); |
| i::Object* null = i::ReadOnlyRoots(i_isolate).null_value(); |
| for (int i = old_size; i < new_size; ++i) new_array->set(i, null); |
| receiver->set_functions(*new_array); |
| } |
| |
| // TODO(gdeepti): use weak links for instances |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| return_value.Set(old_size); |
| } |
| |
| // WebAssembly.Table.get(num) -> JSFunction |
| void WebAssemblyTableGet(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Table.get()"); |
| Local<Context> context = isolate->GetCurrentContext(); |
| EXTRACT_THIS(receiver, WasmTableObject); |
| i::Handle<i::FixedArray> array(receiver->functions(), i_isolate); |
| int64_t i = 0; |
| if (!args[0]->IntegerValue(context).To(&i)) return; |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| if (i < 0 || i >= array->length()) { |
| thrower.RangeError("index out of bounds"); |
| return; |
| } |
| |
| i::Handle<i::Object> value(array->get(static_cast<int>(i)), i_isolate); |
| return_value.Set(Utils::ToLocal(value)); |
| } |
| |
| // WebAssembly.Table.set(num, JSFunction) |
| void WebAssemblyTableSet(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Table.set()"); |
| Local<Context> context = isolate->GetCurrentContext(); |
| EXTRACT_THIS(receiver, WasmTableObject); |
| |
| // Parameter 0. |
| int64_t index; |
| if (!args[0]->IntegerValue(context).To(&index)) return; |
| |
| // Parameter 1. |
| i::Handle<i::Object> value = Utils::OpenHandle(*args[1]); |
| if (!value->IsNull(i_isolate) && |
| !i::WasmExportedFunction::IsWasmExportedFunction(*value)) { |
| thrower.TypeError("Argument 1 must be null or a WebAssembly function"); |
| return; |
| } |
| |
| if (index < 0 || index >= receiver->functions()->length()) { |
| thrower.RangeError("index out of bounds"); |
| return; |
| } |
| |
| i::WasmTableObject::Set(i_isolate, receiver, static_cast<int32_t>(index), |
| value->IsNull(i_isolate) |
| ? i::Handle<i::JSFunction>::null() |
| : i::Handle<i::JSFunction>::cast(value)); |
| } |
| |
| // WebAssembly.Memory.grow(num) -> num |
| void WebAssemblyMemoryGrow(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Memory.grow()"); |
| Local<Context> context = isolate->GetCurrentContext(); |
| EXTRACT_THIS(receiver, WasmMemoryObject); |
| |
| int64_t delta_size = 0; |
| if (!args[0]->IntegerValue(context).To(&delta_size)) return; |
| |
| int64_t max_size64 = receiver->maximum_pages(); |
| if (max_size64 < 0 || max_size64 > int64_t{i::wasm::max_mem_pages()}) { |
| max_size64 = i::wasm::max_mem_pages(); |
| } |
| i::Handle<i::JSArrayBuffer> old_buffer(receiver->array_buffer(), i_isolate); |
| if (!old_buffer->is_growable()) { |
| thrower.RangeError("This memory cannot be grown"); |
| return; |
| } |
| int64_t old_size = old_buffer->byte_length() / i::wasm::kWasmPageSize; |
| int64_t new_size64 = old_size + delta_size; |
| if (delta_size < 0 || max_size64 < new_size64 || new_size64 < old_size) { |
| thrower.RangeError(new_size64 < old_size ? "trying to shrink memory" |
| : "maximum memory size exceeded"); |
| return; |
| } |
| int32_t ret = i::WasmMemoryObject::Grow(i_isolate, receiver, |
| static_cast<uint32_t>(delta_size)); |
| if (ret == -1) { |
| thrower.RangeError("Unable to grow instance memory."); |
| return; |
| } |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| return_value.Set(ret); |
| } |
| |
| // WebAssembly.Memory.buffer -> ArrayBuffer |
| void WebAssemblyMemoryGetBuffer( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, "WebAssembly.Memory.buffer"); |
| EXTRACT_THIS(receiver, WasmMemoryObject); |
| |
| i::Handle<i::Object> buffer_obj(receiver->array_buffer(), i_isolate); |
| DCHECK(buffer_obj->IsJSArrayBuffer()); |
| i::Handle<i::JSArrayBuffer> buffer(i::JSArrayBuffer::cast(*buffer_obj), |
| i_isolate); |
| if (buffer->is_shared()) { |
| // TODO(gdeepti): More needed here for when cached buffer, and current |
| // buffer are out of sync, handle that here when bounds checks, and Grow |
| // are handled correctly. |
| Maybe<bool> result = |
| buffer->SetIntegrityLevel(buffer, i::FROZEN, i::kDontThrow); |
| if (!result.FromJust()) { |
| thrower.TypeError( |
| "Status of setting SetIntegrityLevel of buffer is false."); |
| } |
| } |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| return_value.Set(Utils::ToLocal(buffer)); |
| } |
| |
| void WebAssemblyGlobalGetValueCommon( |
| const v8::FunctionCallbackInfo<v8::Value>& args, const char* name) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| ScheduledErrorThrower thrower(i_isolate, name); |
| EXTRACT_THIS(receiver, WasmGlobalObject); |
| |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| |
| switch (receiver->type()) { |
| case i::wasm::kWasmI32: |
| return_value.Set(receiver->GetI32()); |
| break; |
| case i::wasm::kWasmI64: { |
| auto enabled_features = i::wasm::WasmFeaturesFromIsolate(i_isolate); |
| if (enabled_features.bigint) { |
| Local<BigInt> value = BigInt::New(isolate, receiver->GetI64()); |
| |
| return_value.Set(value); |
| } else { |
| thrower.TypeError("Can't get the value of i64 WebAssembly.Global"); |
| } |
| break; |
| } |
| case i::wasm::kWasmF32: |
| return_value.Set(receiver->GetF32()); |
| break; |
| case i::wasm::kWasmF64: |
| return_value.Set(receiver->GetF64()); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| // WebAssembly.Global.valueOf() -> num |
| void WebAssemblyGlobalValueOf(const v8::FunctionCallbackInfo<v8::Value>& args) { |
| return WebAssemblyGlobalGetValueCommon(args, "WebAssembly.Global.valueOf()"); |
| } |
| |
| // get WebAssembly.Global.value -> num |
| void WebAssemblyGlobalGetValue( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| return WebAssemblyGlobalGetValueCommon(args, "get WebAssembly.Global.value"); |
| } |
| |
| // set WebAssembly.Global.value(num) |
| void WebAssemblyGlobalSetValue( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| v8::Isolate* isolate = args.GetIsolate(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| HandleScope scope(isolate); |
| Local<Context> context = isolate->GetCurrentContext(); |
| ScheduledErrorThrower thrower(i_isolate, "set WebAssembly.Global.value"); |
| EXTRACT_THIS(receiver, WasmGlobalObject); |
| |
| if (!receiver->is_mutable()) { |
| thrower.TypeError("Can't set the value of an immutable global."); |
| return; |
| } |
| |
| switch (receiver->type()) { |
| case i::wasm::kWasmI32: { |
| int32_t i32_value = 0; |
| if (!args[0]->Int32Value(context).To(&i32_value)) return; |
| receiver->SetI32(i32_value); |
| break; |
| } |
| case i::wasm::kWasmI64: { |
| auto enabled_features = i::wasm::WasmFeaturesFromIsolate(i_isolate); |
| if (enabled_features.bigint) { |
| v8::Local<v8::BigInt> bigint_value; |
| if (!args[0]->ToBigInt(context).ToLocal(&bigint_value)) return; |
| receiver->SetI64(bigint_value->Int64Value()); |
| } else { |
| thrower.TypeError("Can't set the value of i64 WebAssembly.Global"); |
| } |
| break; |
| } |
| case i::wasm::kWasmF32: { |
| double f64_value = 0; |
| if (!args[0]->NumberValue(context).To(&f64_value)) return; |
| receiver->SetF32(static_cast<float>(f64_value)); |
| break; |
| } |
| case i::wasm::kWasmF64: { |
| double f64_value = 0; |
| if (!args[0]->NumberValue(context).To(&f64_value)) return; |
| receiver->SetF64(f64_value); |
| break; |
| } |
| default: |
| UNREACHABLE(); |
| } |
| } |
| |
| } // namespace |
| |
| // TODO(titzer): we use the API to create the function template because the |
| // internal guts are too ugly to replicate here. |
| static i::Handle<i::FunctionTemplateInfo> NewFunctionTemplate( |
| i::Isolate* i_isolate, FunctionCallback func) { |
| Isolate* isolate = reinterpret_cast<Isolate*>(i_isolate); |
| Local<FunctionTemplate> templ = FunctionTemplate::New(isolate, func); |
| templ->ReadOnlyPrototype(); |
| return v8::Utils::OpenHandle(*templ); |
| } |
| |
| static i::Handle<i::ObjectTemplateInfo> NewObjectTemplate( |
| i::Isolate* i_isolate) { |
| Isolate* isolate = reinterpret_cast<Isolate*>(i_isolate); |
| Local<ObjectTemplate> templ = ObjectTemplate::New(isolate); |
| return v8::Utils::OpenHandle(*templ); |
| } |
| |
| namespace internal { |
| |
| Handle<JSFunction> CreateFunc(Isolate* isolate, Handle<String> name, |
| FunctionCallback func) { |
| Handle<FunctionTemplateInfo> temp = NewFunctionTemplate(isolate, func); |
| Handle<JSFunction> function = |
| ApiNatives::InstantiateFunction(temp, name).ToHandleChecked(); |
| DCHECK(function->shared()->HasSharedName()); |
| return function; |
| } |
| |
| Handle<JSFunction> InstallFunc(Isolate* isolate, Handle<JSObject> object, |
| const char* str, FunctionCallback func, |
| int length = 0, |
| PropertyAttributes attributes = NONE) { |
| Handle<String> name = v8_str(isolate, str); |
| Handle<JSFunction> function = CreateFunc(isolate, name, func); |
| function->shared()->set_length(length); |
| JSObject::AddProperty(isolate, object, name, function, attributes); |
| return function; |
| } |
| |
| Handle<JSFunction> InstallConstructorFunc(Isolate* isolate, |
| Handle<JSObject> object, |
| const char* str, |
| FunctionCallback func) { |
| return InstallFunc(isolate, object, str, func, 1, DONT_ENUM); |
| } |
| |
| Handle<String> GetterName(Isolate* isolate, Handle<String> name) { |
| return Name::ToFunctionName(isolate, name, isolate->factory()->get_string()) |
| .ToHandleChecked(); |
| } |
| |
| void InstallGetter(Isolate* isolate, Handle<JSObject> object, const char* str, |
| FunctionCallback func) { |
| Handle<String> name = v8_str(isolate, str); |
| Handle<JSFunction> function = |
| CreateFunc(isolate, GetterName(isolate, name), func); |
| |
| Utils::ToLocal(object)->SetAccessorProperty(Utils::ToLocal(name), |
| Utils::ToLocal(function), |
| Local<Function>(), v8::None); |
| } |
| |
| Handle<String> SetterName(Isolate* isolate, Handle<String> name) { |
| return Name::ToFunctionName(isolate, name, isolate->factory()->set_string()) |
| .ToHandleChecked(); |
| } |
| |
| void InstallGetterSetter(Isolate* isolate, Handle<JSObject> object, |
| const char* str, FunctionCallback getter, |
| FunctionCallback setter) { |
| Handle<String> name = v8_str(isolate, str); |
| Handle<JSFunction> getter_func = |
| CreateFunc(isolate, GetterName(isolate, name), getter); |
| Handle<JSFunction> setter_func = |
| CreateFunc(isolate, SetterName(isolate, name), setter); |
| setter_func->shared()->set_length(1); |
| |
| v8::PropertyAttribute attributes = v8::None; |
| |
| Utils::ToLocal(object)->SetAccessorProperty( |
| Utils::ToLocal(name), Utils::ToLocal(getter_func), |
| Utils::ToLocal(setter_func), attributes); |
| } |
| |
| // Assigns a dummy instance template to the given constructor function. Used to |
| // make sure the implicit receivers for the constructors in this file have an |
| // instance type different from the internal one, they allocate the resulting |
| // object explicitly and ignore implicit receiver. |
| void SetDummyInstanceTemplate(Isolate* isolate, Handle<JSFunction> fun) { |
| Handle<ObjectTemplateInfo> instance_template = NewObjectTemplate(isolate); |
| FunctionTemplateInfo::SetInstanceTemplate( |
| isolate, handle(fun->shared()->get_api_func_data(), isolate), |
| instance_template); |
| } |
| |
| // static |
| void WasmJs::Install(Isolate* isolate, bool exposed_on_global_object) { |
| Handle<JSGlobalObject> global = isolate->global_object(); |
| Handle<Context> context(global->native_context(), isolate); |
| // Install the JS API once only. |
| Object* prev = context->get(Context::WASM_MODULE_CONSTRUCTOR_INDEX); |
| if (!prev->IsUndefined(isolate)) { |
| DCHECK(prev->IsJSFunction()); |
| return; |
| } |
| |
| Factory* factory = isolate->factory(); |
| |
| // Setup WebAssembly |
| Handle<String> name = v8_str(isolate, "WebAssembly"); |
| NewFunctionArgs args = NewFunctionArgs::ForFunctionWithoutCode( |
| name, isolate->strict_function_map(), LanguageMode::kStrict); |
| Handle<JSFunction> cons = factory->NewFunction(args); |
| JSFunction::SetPrototype(cons, isolate->initial_object_prototype()); |
| Handle<JSObject> webassembly = factory->NewJSObject(cons, TENURED); |
| |
| PropertyAttributes ro_attributes = |
| static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY); |
| JSObject::AddProperty(isolate, webassembly, factory->to_string_tag_symbol(), |
| name, ro_attributes); |
| InstallFunc(isolate, webassembly, "compile", WebAssemblyCompile, 1); |
| InstallFunc(isolate, webassembly, "validate", WebAssemblyValidate, 1); |
| InstallFunc(isolate, webassembly, "instantiate", WebAssemblyInstantiate, 1); |
| |
| if (isolate->wasm_streaming_callback() != nullptr) { |
| InstallFunc(isolate, webassembly, "compileStreaming", |
| WebAssemblyCompileStreaming, 1); |
| InstallFunc(isolate, webassembly, "instantiateStreaming", |
| WebAssemblyInstantiateStreaming, 1); |
| } |
| |
| // Expose the API on the global object if configured to do so. |
| if (exposed_on_global_object) { |
| JSObject::AddProperty(isolate, global, name, webassembly, DONT_ENUM); |
| } |
| |
| // Setup Module |
| Handle<JSFunction> module_constructor = |
| InstallConstructorFunc(isolate, webassembly, "Module", WebAssemblyModule); |
| context->set_wasm_module_constructor(*module_constructor); |
| SetDummyInstanceTemplate(isolate, module_constructor); |
| JSFunction::EnsureHasInitialMap(module_constructor); |
| Handle<JSObject> module_proto( |
| JSObject::cast(module_constructor->instance_prototype()), isolate); |
| i::Handle<i::Map> module_map = |
| isolate->factory()->NewMap(i::WASM_MODULE_TYPE, WasmModuleObject::kSize); |
| JSFunction::SetInitialMap(module_constructor, module_map, module_proto); |
| InstallFunc(isolate, module_constructor, "imports", WebAssemblyModuleImports, |
| 1); |
| InstallFunc(isolate, module_constructor, "exports", WebAssemblyModuleExports, |
| 1); |
| InstallFunc(isolate, module_constructor, "customSections", |
| WebAssemblyModuleCustomSections, 2); |
| JSObject::AddProperty(isolate, module_proto, factory->to_string_tag_symbol(), |
| v8_str(isolate, "WebAssembly.Module"), ro_attributes); |
| |
| // Setup Instance |
| Handle<JSFunction> instance_constructor = InstallConstructorFunc( |
| isolate, webassembly, "Instance", WebAssemblyInstance); |
| context->set_wasm_instance_constructor(*instance_constructor); |
| SetDummyInstanceTemplate(isolate, instance_constructor); |
| JSFunction::EnsureHasInitialMap(instance_constructor); |
| Handle<JSObject> instance_proto( |
| JSObject::cast(instance_constructor->instance_prototype()), isolate); |
| i::Handle<i::Map> instance_map = isolate->factory()->NewMap( |
| i::WASM_INSTANCE_TYPE, WasmInstanceObject::kSize); |
| JSFunction::SetInitialMap(instance_constructor, instance_map, instance_proto); |
| InstallGetter(isolate, instance_proto, "exports", |
| WebAssemblyInstanceGetExports); |
| JSObject::AddProperty(isolate, instance_proto, |
| factory->to_string_tag_symbol(), |
| v8_str(isolate, "WebAssembly.Instance"), ro_attributes); |
| |
| // Setup Table |
| Handle<JSFunction> table_constructor = |
| InstallConstructorFunc(isolate, webassembly, "Table", WebAssemblyTable); |
| context->set_wasm_table_constructor(*table_constructor); |
| SetDummyInstanceTemplate(isolate, table_constructor); |
| JSFunction::EnsureHasInitialMap(table_constructor); |
| Handle<JSObject> table_proto( |
| JSObject::cast(table_constructor->instance_prototype()), isolate); |
| i::Handle<i::Map> table_map = |
| isolate->factory()->NewMap(i::WASM_TABLE_TYPE, WasmTableObject::kSize); |
| JSFunction::SetInitialMap(table_constructor, table_map, table_proto); |
| InstallGetter(isolate, table_proto, "length", WebAssemblyTableGetLength); |
| InstallFunc(isolate, table_proto, "grow", WebAssemblyTableGrow, 1); |
| InstallFunc(isolate, table_proto, "get", WebAssemblyTableGet, 1); |
| InstallFunc(isolate, table_proto, "set", WebAssemblyTableSet, 2); |
| JSObject::AddProperty(isolate, table_proto, factory->to_string_tag_symbol(), |
| v8_str(isolate, "WebAssembly.Table"), ro_attributes); |
| |
| // Setup Memory |
| Handle<JSFunction> memory_constructor = |
| InstallConstructorFunc(isolate, webassembly, "Memory", WebAssemblyMemory); |
| context->set_wasm_memory_constructor(*memory_constructor); |
| SetDummyInstanceTemplate(isolate, memory_constructor); |
| JSFunction::EnsureHasInitialMap(memory_constructor); |
| Handle<JSObject> memory_proto( |
| JSObject::cast(memory_constructor->instance_prototype()), isolate); |
| i::Handle<i::Map> memory_map = |
| isolate->factory()->NewMap(i::WASM_MEMORY_TYPE, WasmMemoryObject::kSize); |
| JSFunction::SetInitialMap(memory_constructor, memory_map, memory_proto); |
| InstallFunc(isolate, memory_proto, "grow", WebAssemblyMemoryGrow, 1); |
| InstallGetter(isolate, memory_proto, "buffer", WebAssemblyMemoryGetBuffer); |
| JSObject::AddProperty(isolate, memory_proto, factory->to_string_tag_symbol(), |
| v8_str(isolate, "WebAssembly.Memory"), ro_attributes); |
| |
| // The context is not set up completely yet. That's why we cannot use |
| // {WasmFeaturesFromIsolate} and have to use {WasmFeaturesFromFlags} instead. |
| auto enabled_features = i::wasm::WasmFeaturesFromFlags(); |
| |
| // Setup Global |
| if (enabled_features.mut_global) { |
| Handle<JSFunction> global_constructor = InstallConstructorFunc( |
| isolate, webassembly, "Global", WebAssemblyGlobal); |
| context->set_wasm_global_constructor(*global_constructor); |
| SetDummyInstanceTemplate(isolate, global_constructor); |
| JSFunction::EnsureHasInitialMap(global_constructor); |
| Handle<JSObject> global_proto( |
| JSObject::cast(global_constructor->instance_prototype()), isolate); |
| i::Handle<i::Map> global_map = isolate->factory()->NewMap( |
| i::WASM_GLOBAL_TYPE, WasmGlobalObject::kSize); |
| JSFunction::SetInitialMap(global_constructor, global_map, global_proto); |
| InstallFunc(isolate, global_proto, "valueOf", WebAssemblyGlobalValueOf, 0); |
| InstallGetterSetter(isolate, global_proto, "value", |
| WebAssemblyGlobalGetValue, WebAssemblyGlobalSetValue); |
| JSObject::AddProperty(isolate, global_proto, |
| factory->to_string_tag_symbol(), |
| v8_str(isolate, "WebAssembly.Global"), ro_attributes); |
| } |
| |
| // Setup Exception |
| if (enabled_features.eh) { |
| Handle<JSFunction> exception_constructor = InstallConstructorFunc( |
| isolate, webassembly, "Exception", WebAssemblyException); |
| context->set_wasm_exception_constructor(*exception_constructor); |
| SetDummyInstanceTemplate(isolate, exception_constructor); |
| JSFunction::EnsureHasInitialMap(exception_constructor); |
| Handle<JSObject> exception_proto( |
| JSObject::cast(exception_constructor->instance_prototype()), isolate); |
| i::Handle<i::Map> exception_map = isolate->factory()->NewMap( |
| i::WASM_EXCEPTION_TYPE, WasmExceptionObject::kSize); |
| JSFunction::SetInitialMap(exception_constructor, exception_map, |
| exception_proto); |
| } |
| |
| // Setup errors |
| Handle<JSFunction> compile_error( |
| isolate->native_context()->wasm_compile_error_function(), isolate); |
| JSObject::AddProperty(isolate, webassembly, |
| isolate->factory()->CompileError_string(), |
| compile_error, DONT_ENUM); |
| Handle<JSFunction> link_error( |
| isolate->native_context()->wasm_link_error_function(), isolate); |
| JSObject::AddProperty(isolate, webassembly, |
| isolate->factory()->LinkError_string(), link_error, |
| DONT_ENUM); |
| Handle<JSFunction> runtime_error( |
| isolate->native_context()->wasm_runtime_error_function(), isolate); |
| JSObject::AddProperty(isolate, webassembly, |
| isolate->factory()->RuntimeError_string(), |
| runtime_error, DONT_ENUM); |
| } |
| |
| #undef ASSIGN |
| #undef EXTRACT_THIS |
| |
| } // namespace internal |
| } // namespace v8 |