e523e530fc
The spec requires this behaviour, and it's generally faster to do this instead of re-resolving and re-creating the instances anyway.
114 lines
3.5 KiB
C++
114 lines
3.5 KiB
C++
/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibJS/Runtime/Object.h>
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#include <LibWasm/AbstractMachine/AbstractMachine.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/WebAssembly/WebAssemblyObjectPrototype.h>
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namespace Web::Bindings {
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class WebAssemblyMemoryObject;
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class WebAssemblyObject final : public JS::Object {
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JS_OBJECT(WebAssemblyObject, JS::Object);
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public:
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explicit WebAssemblyObject(JS::GlobalObject&);
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virtual void initialize(JS::GlobalObject&) override;
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virtual ~WebAssemblyObject() override = default;
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virtual void visit_edges(Cell::Visitor&) override;
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struct CompiledWebAssemblyModule {
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explicit CompiledWebAssemblyModule(Wasm::Module&& module)
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: module(move(module))
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{
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}
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Wasm::Module module;
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};
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// FIXME: These should just be members of the module (instance) object,
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// but the module needs to stick around while its instance is alive
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// so ideally this would be a refcounted object, shared between
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// WebAssemblyModuleObject's and WebAssemblyInstantiatedModuleObject's.
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struct ModuleCache {
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HashMap<Wasm::FunctionAddress, JS::Function*> function_instances;
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HashMap<Wasm::MemoryAddress, WebAssemblyMemoryObject*> memory_instances;
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};
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struct GlobalModuleCache {
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HashMap<Wasm::FunctionAddress, JS::NativeFunction*> function_instances;
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};
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static NonnullOwnPtrVector<CompiledWebAssemblyModule> s_compiled_modules;
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static NonnullOwnPtrVector<Wasm::ModuleInstance> s_instantiated_modules;
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static Vector<ModuleCache> s_module_caches;
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static GlobalModuleCache s_global_cache;
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static Wasm::AbstractMachine s_abstract_machine;
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private:
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JS_DECLARE_NATIVE_FUNCTION(validate);
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JS_DECLARE_NATIVE_FUNCTION(compile);
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JS_DECLARE_NATIVE_FUNCTION(instantiate);
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};
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class WebAssemblyModuleObject final : public JS::Object {
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JS_OBJECT(WebAssemblyModuleObject, JS::Object);
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public:
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explicit WebAssemblyModuleObject(JS::GlobalObject&, size_t index);
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virtual ~WebAssemblyModuleObject() override = default;
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size_t index() const { return m_index; }
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const Wasm::Module& module() const { return WebAssemblyObject::s_compiled_modules.at(m_index).module; }
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private:
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size_t m_index { 0 };
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};
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class WebAssemblyInstanceObject final : public JS::Object {
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JS_OBJECT(WebAssemblyInstanceObject, JS::Object);
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public:
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explicit WebAssemblyInstanceObject(JS::GlobalObject&, size_t index);
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virtual void initialize(JS::GlobalObject&) override;
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virtual ~WebAssemblyInstanceObject() override = default;
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size_t index() const { return m_index; }
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Wasm::ModuleInstance& instance() const { return WebAssemblyObject::s_instantiated_modules.at(m_index); }
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auto& cache() { return WebAssemblyObject::s_module_caches.at(m_index); }
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void visit_edges(Cell::Visitor&) override;
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friend class WebAssemblyInstancePrototype;
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private:
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size_t m_index { 0 };
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JS::Object* m_exports_object { nullptr };
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};
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class WebAssemblyMemoryObject final : public JS::Object {
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JS_OBJECT(WebAssemblyModuleObject, JS::Object);
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public:
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explicit WebAssemblyMemoryObject(JS::GlobalObject&, Wasm::MemoryAddress);
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virtual void initialize(JS::GlobalObject&) override;
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virtual ~WebAssemblyMemoryObject() override = default;
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auto address() const { return m_address; }
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private:
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JS_DECLARE_NATIVE_FUNCTION(grow);
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JS_DECLARE_NATIVE_GETTER(buffer);
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Wasm::MemoryAddress m_address;
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};
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}
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