diff options
Diffstat (limited to 'deps/v8/src/wasm/wasm-js.cc')
| -rw-r--r-- | deps/v8/src/wasm/wasm-js.cc | 324 |
1 files changed, 218 insertions, 106 deletions
diff --git a/deps/v8/src/wasm/wasm-js.cc b/deps/v8/src/wasm/wasm-js.cc index 7ff27dc769b..1a20b88f10e 100644 --- a/deps/v8/src/wasm/wasm-js.cc +++ b/deps/v8/src/wasm/wasm-js.cc @@ -4,8 +4,8 @@ #include "src/wasm/wasm-js.h" +#include "src/api-inl.h" #include "src/api-natives.h" -#include "src/api.h" #include "src/assert-scope.h" #include "src/ast/ast.h" #include "src/execution.h" @@ -29,11 +29,39 @@ namespace v8 { class WasmStreaming::WasmStreamingImpl { public: - void OnBytesReceived(const uint8_t* bytes, size_t size) {} + 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(); - void Finish() {} + // 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; - void Abort(MaybeLocal<Value> exception) {} + resolver_->OnCompilationFailed( + Utils::OpenHandle(*exception.ToLocalChecked())); + } + + 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) @@ -176,30 +204,6 @@ i::MaybeHandle<i::JSReceiver> GetValueAsImports(Local<Value> arg, return i::Handle<i::JSReceiver>::cast(v8::Utils::OpenHandle(*obj)); } -void WebAssemblyCompileStreaming( - const v8::FunctionCallbackInfo<v8::Value>& args) { - v8::Isolate* isolate = args.GetIsolate(); - i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); - - if (!i::wasm::IsWasmCodegenAllowed(i_isolate, i_isolate->native_context())) { - // Manually create a promise and reject it. - Local<Context> context = isolate->GetCurrentContext(); - ASSIGN(Promise::Resolver, resolver, Promise::Resolver::New(context)); - v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); - return_value.Set(resolver->GetPromise()); - ScheduledErrorThrower thrower(i_isolate, "WebAssembly.compileStreaming()"); - thrower.CompileError("Wasm code generation disallowed by embedder"); - auto maybe = resolver->Reject(context, Utils::ToLocal(thrower.Reify())); - CHECK_IMPLIES(!maybe.FromMaybe(false), - i_isolate->has_scheduled_exception()); - return; - } - - MicrotasksScope runs_microtasks(isolate, MicrotasksScope::kRunMicrotasks); - DCHECK_NOT_NULL(i_isolate->wasm_compile_streaming_callback()); - i_isolate->wasm_compile_streaming_callback()(args); -} - namespace { // This class resolves the result of WebAssembly.compile. It just places the // compilation result in the supplied {promise}. @@ -213,6 +217,8 @@ class AsyncCompilationResolver : public i::wasm::CompilationResultResolver { } 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(), @@ -220,6 +226,8 @@ class AsyncCompilationResolver : public i::wasm::CompilationResultResolver { } 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(), @@ -227,6 +235,7 @@ class AsyncCompilationResolver : public i::wasm::CompilationResultResolver { } private: + bool finished_ = false; i::Handle<i::JSPromise> promise_; }; @@ -350,6 +359,8 @@ class AsyncInstantiateCompileResultResolver } void OnCompilationSucceeded(i::Handle<i::WasmModuleObject> result) override { + if (finished_) return; + finished_ = true; isolate_->wasm_engine()->AsyncInstantiate( isolate_, base::make_unique<InstantiateBytesResultResolver>(isolate_, promise_, @@ -358,12 +369,15 @@ class AsyncInstantiateCompileResultResolver } 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: + bool finished_ = false; i::Isolate* isolate_; i::Handle<i::JSPromise> promise_; i::MaybeHandle<i::JSReceiver> maybe_imports_; @@ -390,7 +404,7 @@ void WebAssemblyCompile(const v8::FunctionCallbackInfo<v8::Value>& args) { v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); return_value.Set(promise); - std::unique_ptr<i::wasm::CompilationResultResolver> resolver( + std::shared_ptr<i::wasm::CompilationResultResolver> resolver( new AsyncCompilationResolver(i_isolate, Utils::OpenHandle(*promise))); bool is_shared = false; @@ -400,8 +414,64 @@ void WebAssemblyCompile(const v8::FunctionCallbackInfo<v8::Value>& args) { return; } // Asynchronous compilation handles copying wire bytes if necessary. - i_isolate->wasm_engine()->AsyncCompile(i_isolate, std::move(resolver), bytes, - is_shared); + 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); + MicrotasksScope runs_microtasks(isolate, MicrotasksScope::kRunMicrotasks); + 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 @@ -422,6 +492,7 @@ void WebAssemblyValidate(const v8::FunctionCallbackInfo<v8::Value>& args) { 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. @@ -429,10 +500,12 @@ void WebAssemblyValidate(const v8::FunctionCallbackInfo<v8::Value>& args) { 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, bytes_copy); + 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, bytes); + validated = i_isolate->wasm_engine()->SyncValidate(i_isolate, + enabled_features, bytes); } return_value.Set(Boolean::New(isolate, validated)); @@ -462,6 +535,7 @@ void WebAssemblyModule(const v8::FunctionCallbackInfo<v8::Value>& args) { 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. @@ -469,12 +543,12 @@ void WebAssemblyModule(const v8::FunctionCallbackInfo<v8::Value>& args) { 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, &thrower, bytes_copy); + 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, &thrower, bytes); + module_obj = i_isolate->wasm_engine()->SyncCompile( + i_isolate, enabled_features, &thrower, bytes); } if (module_obj.is_null()) return; @@ -563,40 +637,6 @@ MaybeLocal<Value> WebAssemblyInstantiateImpl(Isolate* isolate, return Utils::ToLocal(instance_object.ToHandleChecked()); } -void WebAssemblyInstantiateCallback( - const v8::FunctionCallbackInfo<v8::Value>& args) { - DCHECK_GE(args.Length(), 1); - Isolate* isolate = args.GetIsolate(); - MicrotasksScope does_not_run_microtasks(isolate, - MicrotasksScope::kDoNotRunMicrotasks); - - HandleScope scope(args.GetIsolate()); - - Local<Context> context = isolate->GetCurrentContext(); - Local<Value> module = args[0]; - - const uint8_t* instance_str = reinterpret_cast<const uint8_t*>("instance"); - const uint8_t* module_str = reinterpret_cast<const uint8_t*>("module"); - Local<Value> instance; - if (!WebAssemblyInstantiateImpl(isolate, module, args.Data()) - .ToLocal(&instance)) { - return; - } - - Local<Object> ret = Object::New(isolate); - Local<String> instance_name = - String::NewFromOneByte(isolate, instance_str, - NewStringType::kInternalized) - .ToLocalChecked(); - Local<String> module_name = - String::NewFromOneByte(isolate, module_str, NewStringType::kInternalized) - .ToLocalChecked(); - - CHECK(ret->CreateDataProperty(context, instance_name, instance).IsJust()); - CHECK(ret->CreateDataProperty(context, module_name, module).IsJust()); - args.GetReturnValue().Set(ret); -} - // new WebAssembly.Instance(module, imports) -> WebAssembly.Instance void WebAssemblyInstance(const v8::FunctionCallbackInfo<v8::Value>& args) { Isolate* isolate = args.GetIsolate(); @@ -634,27 +674,76 @@ void WebAssemblyInstantiateStreaming( i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); i_isolate->CountUsage( v8::Isolate::UseCounterFeature::kWebAssemblyInstantiation); - // we use i_isolate in DCHECKS in the ASSIGN statements. - USE(i_isolate); + MicrotasksScope runs_microtasks(isolate, MicrotasksScope::kRunMicrotasks); HandleScope scope(isolate); - Local<Context> context = isolate->GetCurrentContext(); - ASSIGN(Promise::Resolver, resolver, Promise::Resolver::New(context)); - Local<Value> first_arg_value = args[0]; + ScheduledErrorThrower thrower(i_isolate, + "WebAssembly.instantiateStreaming()"); - ASSIGN(Function, compileStreaming, - Function::New(context, WebAssemblyCompileStreaming)); - ASSIGN(Value, compile_retval, - compileStreaming->Call(context, args.Holder(), 1, &first_arg_value)); - Local<Promise> module_promise = Local<Promise>::Cast(compile_retval); + // 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); - DCHECK(!module_promise.IsEmpty()); - Local<Value> data = args[1]; - ASSIGN(Function, instantiate_impl, - Function::New(context, WebAssemblyInstantiateCallback, data)); - ASSIGN(Promise, result, module_promise->Then(context, instantiate_impl)); - args.GetReturnValue().Set(result); + // 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 @@ -667,7 +756,7 @@ void WebAssemblyInstantiate(const v8::FunctionCallbackInfo<v8::Value>& args) { v8::Isolate::UseCounterFeature::kWebAssemblyInstantiation); MicrotasksScope runs_microtasks(isolate, MicrotasksScope::kRunMicrotasks); - ScheduledErrorThrower thrower(i_isolate, "WebAssembly.instantiate()"); + ScheduledErrorThrower thrower(i_isolate, "WebAssembly Instantiation"); HandleScope scope(isolate); @@ -720,7 +809,7 @@ void WebAssemblyInstantiate(const v8::FunctionCallbackInfo<v8::Value>& args) { // {InstantiationResultResolver}. resolver.reset(); - std::unique_ptr<i::wasm::CompilationResultResolver> compilation_resolver( + std::shared_ptr<i::wasm::CompilationResultResolver> compilation_resolver( new AsyncInstantiateCompileResultResolver( i_isolate, Utils::OpenHandle(*promise), maybe_imports)); @@ -733,8 +822,10 @@ void WebAssemblyInstantiate(const v8::FunctionCallbackInfo<v8::Value>& args) { } // Asynchronous compilation handles copying wire bytes if necessary. - i_isolate->wasm_engine()->AsyncCompile( - i_isolate, std::move(compilation_resolver), bytes, is_shared); + 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, @@ -788,9 +879,7 @@ void WebAssemblyTable(const v8::FunctionCallbackInfo<v8::Value>& args) { if (!maybe.ToLocal(&value)) return; v8::Local<v8::String> string; if (!value->ToString(context).ToLocal(&string)) return; - bool equal; - if (!string->Equals(context, v8_str(isolate, "anyfunc")).To(&equal)) return; - if (!equal) { + if (!string->StringEquals(v8_str(isolate, "anyfunc"))) { thrower.TypeError("Descriptor property 'element' must be 'anyfunc'"); return; } @@ -858,7 +947,8 @@ void WebAssemblyMemory(const v8::FunctionCallbackInfo<v8::Value>& args) { } bool is_shared_memory = false; - if (i::FLAG_experimental_wasm_threads) { + 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); @@ -938,14 +1028,11 @@ void WebAssemblyGlobal(const v8::FunctionCallbackInfo<v8::Value>& args) { v8::Local<v8::String> string; if (!value->ToString(context).ToLocal(&string)) return; - bool equal; - if (string->Equals(context, v8_str(isolate, "i32")).To(&equal) && equal) { + if (string->StringEquals(v8_str(isolate, "i32"))) { type = i::wasm::kWasmI32; - } else if (string->Equals(context, v8_str(isolate, "f32")).To(&equal) && - equal) { + } else if (string->StringEquals(v8_str(isolate, "f32"))) { type = i::wasm::kWasmF32; - } else if (string->Equals(context, v8_str(isolate, "f64")).To(&equal) && - equal) { + } else if (string->StringEquals(v8_str(isolate, "f64"))) { type = i::wasm::kWasmF64; } else { thrower.TypeError( @@ -1294,19 +1381,26 @@ void WebAssemblyGlobalSetValue( // 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> NewTemplate(i::Isolate* i_isolate, - FunctionCallback func) { +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 = NewTemplate(isolate, func); + Handle<FunctionTemplateInfo> temp = NewFunctionTemplate(isolate, func); Handle<JSFunction> function = ApiNatives::InstantiateFunction(temp, name).ToHandleChecked(); DCHECK(function->shared()->HasSharedName()); @@ -1365,6 +1459,15 @@ void InstallGetterSetter(Isolate* isolate, Handle<JSObject> object, 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); + fun->shared()->get_api_func_data()->set_instance_template(*instance_template); +} + void WasmJs::Install(Isolate* isolate, bool exposed_on_global_object) { Handle<JSGlobalObject> global = isolate->global_object(); Handle<Context> context(global->native_context(), isolate); @@ -1394,7 +1497,7 @@ void WasmJs::Install(Isolate* isolate, bool exposed_on_global_object) { InstallFunc(isolate, webassembly, "validate", WebAssemblyValidate, 1); InstallFunc(isolate, webassembly, "instantiate", WebAssemblyInstantiate, 1); - if (isolate->wasm_compile_streaming_callback() != nullptr) { + if (isolate->wasm_streaming_callback() != nullptr) { InstallFunc(isolate, webassembly, "compileStreaming", WebAssemblyCompileStreaming, 1); InstallFunc(isolate, webassembly, "instantiateStreaming", @@ -1410,6 +1513,7 @@ void WasmJs::Install(Isolate* isolate, bool exposed_on_global_object) { Handle<JSFunction> module_constructor = InstallFunc(isolate, webassembly, "Module", WebAssemblyModule, 1); 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); @@ -1429,6 +1533,7 @@ void WasmJs::Install(Isolate* isolate, bool exposed_on_global_object) { Handle<JSFunction> instance_constructor = InstallFunc(isolate, webassembly, "Instance", WebAssemblyInstance, 1); 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); @@ -1445,6 +1550,7 @@ void WasmJs::Install(Isolate* isolate, bool exposed_on_global_object) { Handle<JSFunction> table_constructor = InstallFunc(isolate, webassembly, "Table", WebAssemblyTable, 1); 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); @@ -1462,6 +1568,7 @@ void WasmJs::Install(Isolate* isolate, bool exposed_on_global_object) { Handle<JSFunction> memory_constructor = InstallFunc(isolate, webassembly, "Memory", WebAssemblyMemory, 1); 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); @@ -1474,10 +1581,15 @@ void WasmJs::Install(Isolate* isolate, bool exposed_on_global_object) { v8_str(isolate, "WebAssembly.Memory"), ro_attributes); // Setup Global - if (i::FLAG_experimental_wasm_mut_global) { + + // 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(); + if (enabled_features.mut_global) { Handle<JSFunction> global_constructor = InstallFunc(isolate, webassembly, "Global", WebAssemblyGlobal, 1); 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); |