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/*
* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibJS/Runtime/Object.h>
#include <LibWasm/AbstractMachine/AbstractMachine.h>
#include <LibWeb/Forward.h>
#include <LibWeb/WebAssembly/WebAssemblyInstanceObjectPrototype.h>
namespace Web::Bindings {
class WebAssemblyMemoryObject;
class WebAssemblyTableObject;
JS::ThrowCompletionOr<size_t> parse_module(JS::VM&, JS::Object* buffer);
JS::NativeFunction* create_native_function(JS::VM&, Wasm::FunctionAddress address, DeprecatedString const& name);
JS::Value to_js_value(JS::VM&, Wasm::Value& wasm_value);
JS::ThrowCompletionOr<Wasm::Value> to_webassembly_value(JS::VM&, JS::Value value, Wasm::ValueType const& type);
class WebAssemblyObject final : public JS::Object {
JS_OBJECT(WebAssemblyObject, JS::Object);
public:
explicit WebAssemblyObject(JS::Realm&);
virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
virtual ~WebAssemblyObject() override = default;
virtual void visit_edges(Cell::Visitor&) override;
static JS::ThrowCompletionOr<size_t> instantiate_module(JS::VM&, Wasm::Module const&);
struct CompiledWebAssemblyModule {
explicit CompiledWebAssemblyModule(Wasm::Module&& module)
: module(move(module))
{
}
Wasm::Module module;
};
// FIXME: These should just be members of the module (instance) object,
// but the module needs to stick around while its instance is alive
// so ideally this would be a refcounted object, shared between
// WebAssemblyModuleObject's and WebAssemblyInstantiatedModuleObject's.
struct ModuleCache {
HashMap<Wasm::FunctionAddress, JS::FunctionObject*> function_instances;
HashMap<Wasm::MemoryAddress, WebAssemblyMemoryObject*> memory_instances;
HashMap<Wasm::TableAddress, WebAssemblyTableObject*> table_instances;
};
struct GlobalModuleCache {
HashMap<Wasm::FunctionAddress, JS::NativeFunction*> function_instances;
};
static Vector<NonnullOwnPtr<CompiledWebAssemblyModule>> s_compiled_modules;
static Vector<NonnullOwnPtr<Wasm::ModuleInstance>> s_instantiated_modules;
static Vector<ModuleCache> s_module_caches;
static GlobalModuleCache s_global_cache;
static Wasm::AbstractMachine s_abstract_machine;
private:
JS_DECLARE_NATIVE_FUNCTION(validate);
JS_DECLARE_NATIVE_FUNCTION(compile);
JS_DECLARE_NATIVE_FUNCTION(instantiate);
};
class WebAssemblyMemoryObject final : public JS::Object {
JS_OBJECT(WebAssemblyMemoryObject, JS::Object);
public:
WebAssemblyMemoryObject(JS::Realm&, Wasm::MemoryAddress);
virtual ~WebAssemblyMemoryObject() override = default;
auto address() const { return m_address; }
private:
Wasm::MemoryAddress m_address;
};
}
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