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https://github.com/LadybirdBrowser/ladybird.git
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0efa98a57a
This has quite a lot of fall out. But the majority of it is just type or UDL substitution, where the changes just fall through to other function calls. By changing property key storage to UTF-16, the main affected areas are: * NativeFunction names must now be UTF-16 * Bytecode identifiers must now be UTF-16 * Module/binding names must now be UTF-16
121 lines
3.5 KiB
C++
121 lines
3.5 KiB
C++
/*
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* Copyright (c) 2021-2024, Andreas Kling <andreas@ladybird.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 <AK/HashMap.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/OwnPtr.h>
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#include <AK/Utf16FlyString.h>
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#include <AK/WeakPtr.h>
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#include <LibGC/CellAllocator.h>
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#include <LibJS/Bytecode/IdentifierTable.h>
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#include <LibJS/Bytecode/Label.h>
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#include <LibJS/Bytecode/StringTable.h>
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#include <LibJS/Export.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibJS/LocalVariable.h>
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#include <LibJS/Runtime/EnvironmentCoordinate.h>
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#include <LibJS/SourceRange.h>
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namespace JS::Bytecode {
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// Represents one polymorphic inline cache used for property lookups.
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struct PropertyLookupCache {
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static constexpr size_t max_number_of_shapes_to_remember = 4;
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struct Entry {
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WeakPtr<Shape> shape;
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Optional<u32> property_offset;
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WeakPtr<Object> prototype;
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WeakPtr<PrototypeChainValidity> prototype_chain_validity;
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};
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AK::Array<Entry, max_number_of_shapes_to_remember> entries;
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};
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struct GlobalVariableCache : public PropertyLookupCache {
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u64 environment_serial_number { 0 };
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u32 environment_binding_index { 0 };
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bool has_environment_binding_index { false };
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bool in_module_environment { false };
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};
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struct SourceRecord {
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u32 source_start_offset {};
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u32 source_end_offset {};
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};
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class JS_API Executable final : public Cell {
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GC_CELL(Executable, Cell);
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GC_DECLARE_ALLOCATOR(Executable);
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public:
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Executable(
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Vector<u8> bytecode,
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NonnullOwnPtr<IdentifierTable>,
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NonnullOwnPtr<StringTable>,
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NonnullOwnPtr<RegexTable>,
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Vector<Value> constants,
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NonnullRefPtr<SourceCode const>,
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size_t number_of_property_lookup_caches,
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size_t number_of_global_variable_caches,
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size_t number_of_registers,
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bool is_strict_mode);
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virtual ~Executable() override;
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Utf16FlyString name;
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Vector<u8> bytecode;
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Vector<PropertyLookupCache> property_lookup_caches;
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Vector<GlobalVariableCache> global_variable_caches;
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NonnullOwnPtr<StringTable> string_table;
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NonnullOwnPtr<IdentifierTable> identifier_table;
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NonnullOwnPtr<RegexTable> regex_table;
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Vector<Value> constants;
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NonnullRefPtr<SourceCode const> source_code;
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size_t number_of_registers { 0 };
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bool is_strict_mode { false };
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struct ExceptionHandlers {
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size_t start_offset;
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size_t end_offset;
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Optional<size_t> handler_offset;
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Optional<size_t> finalizer_offset;
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};
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Vector<ExceptionHandlers> exception_handlers;
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Vector<size_t> basic_block_start_offsets;
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HashMap<size_t, SourceRecord> source_map;
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Vector<LocalVariable> local_variable_names;
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size_t local_index_base { 0 };
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size_t argument_index_base { 0 };
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Optional<IdentifierTableIndex> length_identifier;
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String const& get_string(StringTableIndex index) const { return string_table->get(index); }
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Utf16FlyString const& get_identifier(IdentifierTableIndex index) const { return identifier_table->get(index); }
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Optional<Utf16FlyString const&> get_identifier(Optional<IdentifierTableIndex> const& index) const
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{
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if (!index.has_value())
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return {};
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return get_identifier(*index);
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}
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[[nodiscard]] Optional<ExceptionHandlers const&> exception_handlers_for_offset(size_t offset) const;
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[[nodiscard]] UnrealizedSourceRange source_range_at(size_t offset) const;
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void dump() const;
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private:
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virtual void visit_edges(Visitor&) override;
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};
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}
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