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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/WebAssemblyObjectPrototype.h>
namespace Web::Bindings {
class WebAssemblyMemoryObject;
class WebAssemblyObject final : public JS::Object {
JS_OBJECT(WebAssemblyObject, JS::Object);
public:
explicit WebAssemblyObject(JS::GlobalObject&);
virtual void initialize(JS::GlobalObject&) override;
virtual ~WebAssemblyObject() override = default;
virtual void visit_edges(Cell::Visitor&) override;
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::Function*> function_instances;
HashMap<Wasm::MemoryAddress, WebAssemblyMemoryObject*> memory_instances;
};
struct GlobalModuleCache {
HashMap<Wasm::FunctionAddress, JS::NativeFunction*> function_instances;
};
static NonnullOwnPtrVector<CompiledWebAssemblyModule> s_compiled_modules;
static NonnullOwnPtrVector<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 WebAssemblyModuleObject final : public JS::Object {
JS_OBJECT(WebAssemblyModuleObject, JS::Object);
public:
explicit WebAssemblyModuleObject(JS::GlobalObject&, size_t index);
virtual ~WebAssemblyModuleObject() override = default;
size_t index() const { return m_index; }
const Wasm::Module& module() const { return WebAssemblyObject::s_compiled_modules.at(m_index).module; }
private:
size_t m_index { 0 };
};
class WebAssemblyInstanceObject final : public JS::Object {
JS_OBJECT(WebAssemblyInstanceObject, JS::Object);
public:
explicit WebAssemblyInstanceObject(JS::GlobalObject&, size_t index);
virtual void initialize(JS::GlobalObject&) override;
virtual ~WebAssemblyInstanceObject() override = default;
size_t index() const { return m_index; }
Wasm::ModuleInstance& instance() const { return WebAssemblyObject::s_instantiated_modules.at(m_index); }
auto& cache() { return WebAssemblyObject::s_module_caches.at(m_index); }
void visit_edges(Cell::Visitor&) override;
friend class WebAssemblyInstancePrototype;
private:
size_t m_index { 0 };
JS::Object* m_exports_object { nullptr };
};
class WebAssemblyMemoryObject final : public JS::Object {
JS_OBJECT(WebAssemblyModuleObject, JS::Object);
public:
explicit WebAssemblyMemoryObject(JS::GlobalObject&, Wasm::MemoryAddress);
virtual void initialize(JS::GlobalObject&) override;
virtual ~WebAssemblyMemoryObject() override = default;
auto address() const { return m_address; }
private:
JS_DECLARE_NATIVE_FUNCTION(grow);
JS_DECLARE_NATIVE_GETTER(buffer);
Wasm::MemoryAddress m_address;
};
}
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