mirror of
https://github.com/LadybirdBrowser/ladybird
synced 2026-05-10 17:12:41 +02:00
4a7dc45b3f
Split Rust program compilation so code generation and assembly finish before the main thread materializes GC-backed executable objects. The new CompiledProgram handle owns the parsed program, generator state, and bytecode until C++ consumes it on the main thread. Wire WebContent script fetching through that handle for classic scripts and modules. Syntax-error paths still return ParsedProgram, so existing error reporting stays in place. Successful fetches now do top-level codegen on the thread pool before deferred_invoke hands control back to the main thread. Executable creation, SharedFunctionInstanceData materialization, module metadata extraction, and declaration data extraction still run on the main thread where VM and GC access is valid.
82 lines
3.8 KiB
C++
82 lines
3.8 KiB
C++
/*
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* Copyright (c) 2021-2023, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2022, David Tuin <davidot@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/CyclicModule.h>
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#include <LibJS/Export.h>
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#include <LibJS/Forward.h>
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#include <LibJS/ModuleEntry.h>
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#include <LibJS/Runtime/ExecutionContext.h>
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namespace JS {
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namespace FFI {
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struct ParsedProgram;
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struct CompiledProgram;
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}
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// 16.2.1.6 Source Text Module Records, https://tc39.es/ecma262/#sec-source-text-module-records
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class JS_API SourceTextModule final : public CyclicModule {
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GC_CELL(SourceTextModule, CyclicModule);
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GC_DECLARE_ALLOCATOR(SourceTextModule);
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public:
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virtual ~SourceTextModule() override;
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static Result<GC::Ref<SourceTextModule>, Vector<ParserError>> parse(StringView source_text, Realm&, StringView filename = {}, Script::HostDefined* host_defined = nullptr);
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static Result<GC::Ref<SourceTextModule>, Vector<ParserError>> parse_from_pre_parsed(FFI::ParsedProgram* parsed, NonnullRefPtr<SourceCode const> source_code, Realm&, Script::HostDefined* host_defined = nullptr);
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static Result<GC::Ref<SourceTextModule>, Vector<ParserError>> parse_from_pre_compiled(FFI::CompiledProgram* compiled, NonnullRefPtr<SourceCode const> source_code, Realm&, Script::HostDefined* host_defined = nullptr);
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virtual Vector<Utf16FlyString> get_exported_names(VM& vm, HashTable<Module const*>& export_star_set) override;
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virtual ResolvedBinding resolve_export(VM& vm, Utf16FlyString const& export_name, Vector<ResolvedBinding> resolve_set = {}) override;
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Object* import_meta() { return m_import_meta; }
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void set_import_meta(Badge<VM>, Object* import_meta) { m_import_meta = import_meta; }
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// Pre-computed module declaration instantiation data.
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// These are extracted from the AST at construction time so that
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// initialize_environment() can run without walking the AST.
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struct FunctionToInitialize {
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GC::Ref<SharedFunctionInstanceData> shared_data;
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Utf16FlyString name;
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};
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struct LexicalBinding {
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Utf16FlyString name;
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bool is_constant { false };
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i32 function_index { -1 }; // index into m_functions_to_initialize, -1 if not a function
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};
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protected:
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virtual ThrowCompletionOr<void> initialize_environment(VM& vm) override;
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virtual ThrowCompletionOr<void> execute_module(VM& vm, GC::Ptr<PromiseCapability> capability) override;
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private:
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SourceTextModule(Realm&, StringView filename, Script::HostDefined* host_defined, bool has_top_level_await, Vector<ModuleRequest> requested_modules, Vector<ImportEntry> import_entries, Vector<ExportEntry> local_export_entries, Vector<ExportEntry> indirect_export_entries, Vector<ExportEntry> star_export_entries, Optional<Utf16FlyString> default_export_binding_name, Vector<Utf16FlyString> var_declared_names, Vector<LexicalBinding> lexical_bindings, Vector<FunctionToInitialize> functions_to_initialize, GC::Ptr<Bytecode::Executable> executable, GC::Ptr<SharedFunctionInstanceData> tla_shared_data);
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virtual void visit_edges(Cell::Visitor&) override;
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NonnullOwnPtr<ExecutionContext> m_execution_context; // [[Context]]
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GC::Ptr<Object> m_import_meta; // [[ImportMeta]]
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Vector<ImportEntry> m_import_entries; // [[ImportEntries]]
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Vector<ExportEntry> m_local_export_entries; // [[LocalExportEntries]]
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Vector<ExportEntry> m_indirect_export_entries; // [[IndirectExportEntries]]
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Vector<ExportEntry> m_star_export_entries; // [[StarExportEntries]]
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Vector<Utf16FlyString> m_var_declared_names;
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Vector<LexicalBinding> m_lexical_bindings;
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Vector<FunctionToInitialize> m_functions_to_initialize;
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Optional<Utf16FlyString> m_default_export_binding_name;
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GC::Ptr<Bytecode::Executable> m_executable;
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GC::Ptr<SharedFunctionInstanceData> m_tla_shared_data;
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};
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}
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