| // 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-natives.h" |
| #include "src/api.h" |
| #include "src/assert-scope.h" |
| #include "src/ast/ast.h" |
| #include "src/execution.h" |
| #include "src/factory.h" |
| #include "src/handles.h" |
| #include "src/isolate.h" |
| #include "src/objects-inl.h" |
| #include "src/objects.h" |
| #include "src/parsing/parse-info.h" |
| #include "src/trap-handler/trap-handler.h" |
| #include "src/wasm/module-compiler.h" |
| #include "src/wasm/wasm-api.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" |
| |
| using v8::internal::wasm::ErrorThrower; |
| |
| namespace v8 { |
| |
| 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) |
| |
| 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)); |
| } |
| |
| 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()); |
| i::wasm::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); |
| } |
| |
| // 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); |
| MicrotasksScope runs_microtasks(isolate, MicrotasksScope::kRunMicrotasks); |
| |
| HandleScope scope(isolate); |
| i::wasm::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, resolver, Promise::Resolver::New(context)); |
| v8::ReturnValue<v8::Value> return_value = args.GetReturnValue(); |
| return_value.Set(resolver->GetPromise()); |
| |
| bool is_shared = false; |
| auto bytes = GetFirstArgumentAsBytes(args, &thrower, &is_shared); |
| if (thrower.error()) { |
| auto maybe = resolver->Reject(context, Utils::ToLocal(thrower.Reify())); |
| CHECK_IMPLIES(!maybe.FromMaybe(false), |
| i_isolate->has_scheduled_exception()); |
| return; |
| } |
| i::Handle<i::JSPromise> promise = Utils::OpenHandle(*resolver->GetPromise()); |
| // Asynchronous compilation handles copying wire bytes if necessary. |
| i::wasm::AsyncCompile(i_isolate, promise, bytes, is_shared); |
| } |
| |
| // 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); |
| i::wasm::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; |
| } |
| |
| 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, bytes_copy); |
| } else { |
| // The wire bytes are not shared, OK to use them directly. |
| validated = i_isolate->wasm_engine()->SyncValidate(i_isolate, 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); |
| i::wasm::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; |
| } |
| 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::wasm::SyncCompile(i_isolate, &thrower, bytes_copy); |
| } else { |
| // The wire bytes are not shared, OK to use them directly. |
| module_obj = i::wasm::SyncCompile(i_isolate, &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); |
| i::wasm::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); |
| i::wasm::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); |
| i::wasm::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; |
| { |
| i::wasm::ScheduledErrorThrower thrower(i_isolate, |
| "WebAssembly Instantiation"); |
| i::MaybeHandle<i::JSReceiver> maybe_imports = |
| GetValueAsImports(ffi, &thrower); |
| if (thrower.error()) return {}; |
| |
| i::Handle<i::WasmModuleObject> module_obj = |
| i::Handle<i::WasmModuleObject>::cast( |
| Utils::OpenHandle(Object::Cast(*module))); |
| instance_object = |
| i::wasm::SyncInstantiate(i_isolate, &thrower, 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()); |
| } |
| |
| // Entered as internal implementation detail of sync and async instantiate. |
| // args[0] *must* be a WebAssembly.Module. |
| void WebAssemblyInstantiateImplCallback( |
| const v8::FunctionCallbackInfo<v8::Value>& args) { |
| DCHECK_GE(args.Length(), 1); |
| v8::Isolate* isolate = args.GetIsolate(); |
| MicrotasksScope does_not_run_microtasks(isolate, |
| MicrotasksScope::kDoNotRunMicrotasks); |
| |
| HandleScope scope(args.GetIsolate()); |
| Local<Value> module = args[0]; |
| Local<Value> ffi = args.Data(); |
| Local<Value> instance; |
| if (WebAssemblyInstantiateImpl(isolate, module, ffi).ToLocal(&instance)) { |
| args.GetReturnValue().Set(instance); |
| } |
| } |
| |
| void WebAssemblyInstantiateToPairCallback( |
| 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(); |
| i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate); |
| i_isolate->CountUsage( |
| v8::Isolate::UseCounterFeature::kWebAssemblyInstantiation); |
| MicrotasksScope does_not_run_microtasks(isolate, |
| MicrotasksScope::kDoNotRunMicrotasks); |
| |
| HandleScope scope(args.GetIsolate()); |
| if (i_isolate->wasm_instance_callback()(args)) return; |
| |
| i::wasm::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); |
| // 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]; |
| |
| 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); |
| |
| DCHECK(!module_promise.IsEmpty()); |
| Local<Value> data = args[1]; |
| ASSIGN(Function, instantiate_impl, |
| Function::New(context, WebAssemblyInstantiateToPairCallback, data)); |
| ASSIGN(Promise, result, module_promise->Then(context, instantiate_impl)); |
| args.GetReturnValue().Set(result); |
| } |
| |
| // 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); |
| MicrotasksScope runs_microtasks(isolate, MicrotasksScope::kRunMicrotasks); |
| |
| i::wasm::ScheduledErrorThrower thrower(i_isolate, |
| "WebAssembly.instantiate()"); |
| |
| HandleScope scope(isolate); |
| |
| Local<Context> context = isolate->GetCurrentContext(); |
| |
| ASSIGN(Promise::Resolver, resolver, Promise::Resolver::New(context)); |
| Local<Promise> module_promise = resolver->GetPromise(); |
| args.GetReturnValue().Set(module_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"); |
| auto maybe = resolver->Reject(context, Utils::ToLocal(thrower.Reify())); |
| CHECK_IMPLIES(!maybe.FromMaybe(false), |
| i_isolate->has_scheduled_exception()); |
| return; |
| } |
| |
| FunctionCallback instantiator = nullptr; |
| if (first_arg->IsWasmModuleObject()) { |
| module_promise = resolver->GetPromise(); |
| if (!resolver->Resolve(context, first_arg_value).IsJust()) return; |
| instantiator = WebAssemblyInstantiateImplCallback; |
| } else { |
| ASSIGN(Function, async_compile, Function::New(context, WebAssemblyCompile)); |
| ASSIGN(Value, async_compile_retval, |
| async_compile->Call(context, args.Holder(), 1, &first_arg_value)); |
| module_promise = Local<Promise>::Cast(async_compile_retval); |
| instantiator = WebAssemblyInstantiateToPairCallback; |
| } |
| DCHECK(!module_promise.IsEmpty()); |
| DCHECK_NOT_NULL(instantiator); |
| // If args.Length < 2, this will be undefined - see FunctionCallbackInfo. |
| // We'll check for that in WebAssemblyInstantiateImpl. |
| Local<Value> data = args[1]; |
| ASSIGN(Function, instantiate_impl, |
| Function::New(context, instantiator, data)); |
| ASSIGN(Promise, result, module_promise->Then(context, instantiate_impl)); |
| args.GetReturnValue().Set(result); |
| } |
| |
| bool GetIntegerProperty(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::MaybeLocal<v8::Value> maybe = object->Get(context, property); |
| v8::Local<v8::Value> value; |
| if (maybe.ToLocal(&value)) { |
| int64_t number; |
| if (!value->IntegerValue(context).To(&number)) return false; |
| if (number < lower_bound) { |
| thrower->RangeError("Property value %" PRId64 |
| " is below the lower bound %" PRIx64, |
| number, lower_bound); |
| return false; |
| } |
| if (number > static_cast<int64_t>(upper_bound)) { |
| thrower->RangeError("Property value %" PRId64 |
| " is above the upper bound %" PRIu64, |
| number, upper_bound); |
| return false; |
| } |
| *result = static_cast<int>(number); |
| return true; |
| } |
| return false; |
| } |
| |
| // 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); |
| i::wasm::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; |
| bool equal; |
| if (!string->Equals(context, v8_str(isolate, "anyfunc")).To(&equal)) return; |
| if (!equal) { |
| thrower.TypeError("Descriptor property 'element' must be 'anyfunc'"); |
| return; |
| } |
| } |
| // The descriptor's 'initial'. |
| int64_t initial = 0; |
| if (!GetIntegerProperty(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; |
| Local<String> maximum_key = v8_str(isolate, "maximum"); |
| Maybe<bool> has_maximum = descriptor->Has(context, maximum_key); |
| |
| if (!has_maximum.IsNothing() && has_maximum.FromJust()) { |
| if (!GetIntegerProperty(isolate, &thrower, context, descriptor, maximum_key, |
| &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), 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); |
| i::wasm::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 (!GetIntegerProperty(isolate, &thrower, context, descriptor, |
| v8_str(isolate, "initial"), &initial, 0, |
| i::FLAG_wasm_max_mem_pages)) { |
| return; |
| } |
| // The descriptor's 'maximum'. |
| int64_t maximum = -1; |
| Local<String> maximum_key = v8_str(isolate, "maximum"); |
| Maybe<bool> has_maximum = descriptor->Has(context, maximum_key); |
| |
| if (!has_maximum.IsNothing() && has_maximum.FromJust()) { |
| if (!GetIntegerProperty(isolate, &thrower, context, descriptor, maximum_key, |
| &maximum, initial, |
| i::wasm::kSpecMaxWasmMemoryPages)) { |
| return; |
| } |
| } |
| |
| bool is_shared_memory = false; |
| if (i::FLAG_experimental_wasm_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)) { |
| if (!value->BooleanValue(context).To(&is_shared_memory)) return; |
| } |
| } |
| // 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."); |
| } |
| } |
| |
| size_t size = static_cast<size_t>(i::wasm::kWasmPageSize) * |
| static_cast<size_t>(initial); |
| const bool enable_guard_regions = |
| internal::trap_handler::IsTrapHandlerEnabled(); |
| i::Handle<i::JSArrayBuffer> buffer = i::wasm::NewArrayBuffer( |
| i_isolate, size, enable_guard_regions, |
| is_shared_memory ? i::SharedFlag::kShared : i::SharedFlag::kNotShared); |
| if (buffer.is_null()) { |
| 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<int32_t>(maximum)); |
| args.GetReturnValue().Set(Utils::ToLocal(memory_obj)); |
| } |
| |
| 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); |
| i::wasm::ScheduledErrorThrower thrower(i_isolate, |
| "WebAssembly.Instance.exports()"); |
| EXTRACT_THIS(receiver, WasmInstanceObject); |
| i::Handle<i::JSObject> exports_object(receiver->exports_object()); |
| 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); |
| i::wasm::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); |
| i::wasm::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_isolate->heap()->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); |
| i::wasm::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); |
| i::wasm::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]); |
| // TODO(titzer): use WasmExportedFunction::IsWasmExportedFunction() here. |
| if (!value->IsNull(i_isolate) && |
| (!value->IsJSFunction() || |
| i::Handle<i::JSFunction>::cast(value)->code()->kind() != |
| i::Code::JS_TO_WASM_FUNCTION)) { |
| 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; |
| } |
| |
| // TODO(v8:7232) Allow reset/mutation after addressing referenced issue. |
| int32_t int_index = static_cast<int32_t>(index); |
| if (receiver->functions()->get(int_index) != |
| i_isolate->heap()->undefined_value() && |
| receiver->functions()->get(int_index) != |
| i_isolate->heap()->null_value()) { |
| for (i::StackFrameIterator it(i_isolate); !it.done(); it.Advance()) { |
| if (it.frame()->type() == i::StackFrame::WASM_TO_JS) { |
| thrower.RangeError("Modifying existing entry in table not supported."); |
| return; |
| } |
| } |
| } |
| i::WasmTableObject::Set(i_isolate, receiver, static_cast<int32_t>(int_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); |
| i::wasm::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 > static_cast<int64_t>(i::FLAG_wasm_max_mem_pages)) { |
| max_size64 = i::FLAG_wasm_max_mem_pages; |
| } |
| i::Handle<i::JSArrayBuffer> old_buffer(receiver->array_buffer()); |
| if (!old_buffer->is_growable()) { |
| thrower.RangeError("This memory cannot be grown"); |
| return; |
| } |
| uint32_t old_size = |
| old_buffer->byte_length()->Number() / i::wasm::kSpecMaxWasmMemoryPages; |
| 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); |
| i::wasm::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)); |
| 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)); |
| } |
| } // 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> NewTemplate(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); |
| } |
| |
| namespace internal { |
| |
| Handle<JSFunction> InstallFunc(Isolate* isolate, Handle<JSObject> object, |
| const char* str, FunctionCallback func, |
| int length = 0) { |
| Handle<String> name = v8_str(isolate, str); |
| Handle<FunctionTemplateInfo> temp = NewTemplate(isolate, func); |
| Handle<JSFunction> function = |
| ApiNatives::InstantiateFunction(temp, name).ToHandleChecked(); |
| DCHECK(function->shared()->has_shared_name()); |
| function->shared()->set_length(length); |
| PropertyAttributes attributes = static_cast<PropertyAttributes>(DONT_ENUM); |
| JSObject::AddProperty(object, name, function, attributes); |
| return function; |
| } |
| |
| void InstallGetter(Isolate* isolate, Handle<JSObject> object, |
| const char* str, FunctionCallback func) { |
| Handle<String> name = v8_str(isolate, str); |
| Handle<FunctionTemplateInfo> temp = NewTemplate(isolate, func); |
| // TODO(ishell): shouldn't we set "get "+name as getter's name? |
| Handle<JSFunction> function = |
| ApiNatives::InstantiateFunction(temp).ToHandleChecked(); |
| DCHECK(function->shared()->has_shared_name()); |
| v8::PropertyAttribute attributes = |
| static_cast<v8::PropertyAttribute>(v8::DontEnum); |
| Utils::ToLocal(object)->SetAccessorProperty(Utils::ToLocal(name), |
| Utils::ToLocal(function), |
| Local<Function>(), attributes); |
| } |
| |
| 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()); |
| cons->shared()->set_instance_class_name(*name); |
| Handle<JSObject> webassembly = factory->NewJSObject(cons, TENURED); |
| PropertyAttributes attributes = static_cast<PropertyAttributes>(DONT_ENUM); |
| |
| PropertyAttributes ro_attributes = |
| static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY); |
| JSObject::AddProperty(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_compile_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(global, name, webassembly, attributes); |
| } |
| |
| // Setup Module |
| Handle<JSFunction> module_constructor = |
| InstallFunc(isolate, webassembly, "Module", WebAssemblyModule, 1); |
| context->set_wasm_module_constructor(*module_constructor); |
| JSFunction::EnsureHasInitialMap(module_constructor); |
| Handle<JSObject> module_proto( |
| JSObject::cast(module_constructor->instance_prototype())); |
| i::Handle<i::Map> module_map = isolate->factory()->NewMap( |
| i::WASM_MODULE_TYPE, i::JSObject::kHeaderSize + |
| WasmModuleObject::kFieldCount * i::kPointerSize); |
| 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(module_proto, factory->to_string_tag_symbol(), |
| v8_str(isolate, "WebAssembly.Module"), ro_attributes); |
| |
| // Setup Instance |
| Handle<JSFunction> instance_constructor = |
| InstallFunc(isolate, webassembly, "Instance", WebAssemblyInstance, 1); |
| context->set_wasm_instance_constructor(*instance_constructor); |
| JSFunction::EnsureHasInitialMap(instance_constructor); |
| Handle<JSObject> instance_proto( |
| JSObject::cast(instance_constructor->instance_prototype())); |
| 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(instance_proto, factory->to_string_tag_symbol(), |
| v8_str(isolate, "WebAssembly.Instance"), ro_attributes); |
| |
| // Setup Table |
| Handle<JSFunction> table_constructor = |
| InstallFunc(isolate, webassembly, "Table", WebAssemblyTable, 1); |
| context->set_wasm_table_constructor(*table_constructor); |
| JSFunction::EnsureHasInitialMap(table_constructor); |
| Handle<JSObject> table_proto( |
| JSObject::cast(table_constructor->instance_prototype())); |
| 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(table_proto, factory->to_string_tag_symbol(), |
| v8_str(isolate, "WebAssembly.Table"), ro_attributes); |
| |
| // Setup Memory |
| Handle<JSFunction> memory_constructor = |
| InstallFunc(isolate, webassembly, "Memory", WebAssemblyMemory, 1); |
| context->set_wasm_memory_constructor(*memory_constructor); |
| JSFunction::EnsureHasInitialMap(memory_constructor); |
| Handle<JSObject> memory_proto( |
| JSObject::cast(memory_constructor->instance_prototype())); |
| 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(memory_proto, factory->to_string_tag_symbol(), |
| v8_str(isolate, "WebAssembly.Memory"), ro_attributes); |
| |
| // Setup errors |
| attributes = static_cast<PropertyAttributes>(DONT_ENUM); |
| Handle<JSFunction> compile_error( |
| isolate->native_context()->wasm_compile_error_function()); |
| JSObject::AddProperty(webassembly, isolate->factory()->CompileError_string(), |
| compile_error, attributes); |
| Handle<JSFunction> link_error( |
| isolate->native_context()->wasm_link_error_function()); |
| JSObject::AddProperty(webassembly, isolate->factory()->LinkError_string(), |
| link_error, attributes); |
| Handle<JSFunction> runtime_error( |
| isolate->native_context()->wasm_runtime_error_function()); |
| JSObject::AddProperty(webassembly, isolate->factory()->RuntimeError_string(), |
| runtime_error, attributes); |
| } |
| |
| #undef ASSIGN |
| #undef EXTRACT_THIS |
| |
| } // namespace internal |
| } // namespace v8 |