3c74dc9f4d
This patch adds two macros to declare per-type allocators: - JS_DECLARE_ALLOCATOR(TypeName) - JS_DEFINE_ALLOCATOR(TypeName) When used, they add a type-specific CellAllocator that the Heap will delegate allocation requests to. The result of this is that GC objects of the same type always end up within the same HeapBlock, drastically reducing the ability to perform type confusion attacks. It also improves HeapBlock utilization, since each block now has cells sized exactly to the type used within that block. (Previously we only had a handful of block sizes available, and most GC allocations ended up with a large amount of slack in their tails.) There is a small performance hit from this, but I'm sure we can make up for it elsewhere. Note that the old size-based allocators still exist, and we fall back to them for any type that doesn't have its own CellAllocator.
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
/*
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* Copyright (c) 2021-2022, Tim Flynn <trflynn89@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 <AK/Optional.h>
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#include <AK/String.h>
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#include <AK/StringView.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibLocale/Locale.h>
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namespace JS::Intl {
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class DisplayNames final : public Object {
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JS_OBJECT(DisplayNames, Object);
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JS_DECLARE_ALLOCATOR(DisplayNames);
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enum class Type {
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Invalid,
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Language,
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Region,
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Script,
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Currency,
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Calendar,
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DateTimeField,
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};
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enum class Fallback {
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Invalid,
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None,
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Code,
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};
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enum class LanguageDisplay {
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Dialect,
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Standard,
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};
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public:
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virtual ~DisplayNames() override = default;
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String const& locale() const { return m_locale; }
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void set_locale(String locale) { m_locale = move(locale); }
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::Locale::Style style() const { return m_style; }
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void set_style(StringView style) { m_style = ::Locale::style_from_string(style); }
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StringView style_string() const { return ::Locale::style_to_string(m_style); }
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Type type() const { return m_type; }
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void set_type(StringView type);
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StringView type_string() const;
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Fallback fallback() const { return m_fallback; }
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void set_fallback(StringView fallback);
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StringView fallback_string() const;
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bool has_language_display() const { return m_language_display.has_value(); }
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LanguageDisplay language_display() const { return *m_language_display; }
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void set_language_display(StringView language_display);
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StringView language_display_string() const;
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private:
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DisplayNames(Object& prototype);
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String m_locale; // [[Locale]]
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::Locale::Style m_style { ::Locale::Style::Long }; // [[Style]]
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Type m_type { Type::Invalid }; // [[Type]]
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Fallback m_fallback { Fallback::Invalid }; // [[Fallback]]
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Optional<LanguageDisplay> m_language_display {}; // [[LanguageDisplay]]
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};
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ThrowCompletionOr<Value> canonical_code_for_display_names(VM&, DisplayNames::Type, StringView code);
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bool is_valid_date_time_field_code(StringView field);
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}
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