jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <LibJS/Runtime/Object.h>
10#include <LibWasm/AbstractMachine/AbstractMachine.h>
11#include <LibWeb/Forward.h>
12#include <LibWeb/WebAssembly/WebAssemblyInstanceObjectPrototype.h>
13
14namespace Web::Bindings {
15
16class WebAssemblyMemoryObject;
17class WebAssemblyTableObject;
18JS::ThrowCompletionOr<size_t> parse_module(JS::VM&, JS::Object* buffer);
19JS::NativeFunction* create_native_function(JS::VM&, Wasm::FunctionAddress address, DeprecatedString const& name);
20JS::Value to_js_value(JS::VM&, Wasm::Value& wasm_value);
21JS::ThrowCompletionOr<Wasm::Value> to_webassembly_value(JS::VM&, JS::Value value, Wasm::ValueType const& type);
22
23class WebAssemblyObject final : public JS::Object {
24 JS_OBJECT(WebAssemblyObject, JS::Object);
25
26public:
27 explicit WebAssemblyObject(JS::Realm&);
28 virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
29 virtual ~WebAssemblyObject() override = default;
30
31 virtual void visit_edges(Cell::Visitor&) override;
32
33 static JS::ThrowCompletionOr<size_t> instantiate_module(JS::VM&, Wasm::Module const&);
34
35 struct CompiledWebAssemblyModule {
36 explicit CompiledWebAssemblyModule(Wasm::Module&& module)
37 : module(move(module))
38 {
39 }
40
41 Wasm::Module module;
42 };
43
44 // FIXME: These should just be members of the module (instance) object,
45 // but the module needs to stick around while its instance is alive
46 // so ideally this would be a refcounted object, shared between
47 // WebAssemblyModuleObject's and WebAssemblyInstantiatedModuleObject's.
48 struct ModuleCache {
49 HashMap<Wasm::FunctionAddress, JS::FunctionObject*> function_instances;
50 HashMap<Wasm::MemoryAddress, WebAssemblyMemoryObject*> memory_instances;
51 HashMap<Wasm::TableAddress, WebAssemblyTableObject*> table_instances;
52 };
53 struct GlobalModuleCache {
54 HashMap<Wasm::FunctionAddress, JS::NativeFunction*> function_instances;
55 };
56
57 static Vector<NonnullOwnPtr<CompiledWebAssemblyModule>> s_compiled_modules;
58 static Vector<NonnullOwnPtr<Wasm::ModuleInstance>> s_instantiated_modules;
59 static Vector<ModuleCache> s_module_caches;
60 static GlobalModuleCache s_global_cache;
61
62 static Wasm::AbstractMachine s_abstract_machine;
63
64private:
65 JS_DECLARE_NATIVE_FUNCTION(validate);
66 JS_DECLARE_NATIVE_FUNCTION(compile);
67 JS_DECLARE_NATIVE_FUNCTION(instantiate);
68};
69
70class WebAssemblyMemoryObject final : public JS::Object {
71 JS_OBJECT(WebAssemblyMemoryObject, JS::Object);
72
73public:
74 WebAssemblyMemoryObject(JS::Realm&, Wasm::MemoryAddress);
75 virtual ~WebAssemblyMemoryObject() override = default;
76
77 auto address() const { return m_address; }
78
79private:
80 Wasm::MemoryAddress m_address;
81};
82
83}