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https://github.com/RGBCube/serenity
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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.
66 lines
3.4 KiB
C++
66 lines
3.4 KiB
C++
/*
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* Copyright (c) 2021-2023, Linus Groh <linusg@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/BigInt.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibJS/Runtime/Temporal/AbstractOperations.h>
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namespace JS::Temporal {
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class ZonedDateTime final : public Object {
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JS_OBJECT(ZonedDateTime, Object);
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JS_DECLARE_ALLOCATOR(ZonedDateTime);
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public:
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virtual ~ZonedDateTime() override = default;
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[[nodiscard]] BigInt const& nanoseconds() const { return m_nanoseconds; }
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[[nodiscard]] Object const& time_zone() const { return m_time_zone; }
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[[nodiscard]] Object& time_zone() { return m_time_zone; }
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[[nodiscard]] Object const& calendar() const { return m_calendar; }
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[[nodiscard]] Object& calendar() { return m_calendar; }
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private:
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ZonedDateTime(BigInt const& nanoseconds, Object& time_zone, Object& calendar, Object& prototype);
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virtual void visit_edges(Visitor&) override;
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// 6.4 Properties of Temporal.ZonedDateTime Instances, https://tc39.es/proposal-temporal/#sec-properties-of-temporal-zoneddatetime-instances
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NonnullGCPtr<BigInt const> m_nanoseconds; // [[Nanoseconds]]
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NonnullGCPtr<Object> m_time_zone; // [[TimeZone]]
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NonnullGCPtr<Object> m_calendar; // [[Calendar]]
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};
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struct NanosecondsToDaysResult {
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double days;
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Crypto::SignedBigInteger nanoseconds;
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double day_length;
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};
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enum class OffsetBehavior {
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Option,
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Exact,
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Wall,
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};
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enum class MatchBehavior {
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MatchExactly,
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MatchMinutes,
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};
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ThrowCompletionOr<BigInt const*> interpret_iso_date_time_offset(VM&, i32 year, u8 month, u8 day, u8 hour, u8 minute, u8 second, u16 millisecond, u16 microsecond, u16 nanosecond, OffsetBehavior offset_behavior, double offset_nanoseconds, Value time_zone, StringView disambiguation, StringView offset_option, MatchBehavior match_behavior);
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ThrowCompletionOr<ZonedDateTime*> to_temporal_zoned_date_time(VM&, Value item, Object const* options = nullptr);
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ThrowCompletionOr<ZonedDateTime*> create_temporal_zoned_date_time(VM&, BigInt const& epoch_nanoseconds, Object& time_zone, Object& calendar, FunctionObject const* new_target = nullptr);
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ThrowCompletionOr<String> temporal_zoned_date_time_to_string(VM&, ZonedDateTime& zoned_date_time, Variant<StringView, u8> const& precision, StringView show_calendar, StringView show_time_zone, StringView show_offset, Optional<u64> increment = {}, Optional<StringView> unit = {}, Optional<StringView> rounding_mode = {});
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ThrowCompletionOr<BigInt*> add_zoned_date_time(VM&, BigInt const& epoch_nanoseconds, Value time_zone, Object& calendar, double years, double months, double weeks, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, double nanoseconds, Object* options = nullptr);
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ThrowCompletionOr<DurationRecord> difference_zoned_date_time(VM&, BigInt const& nanoseconds1, BigInt const& nanoseconds2, Object& time_zone, Object& calendar, StringView largest_unit, Object const& options);
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ThrowCompletionOr<NanosecondsToDaysResult> nanoseconds_to_days(VM&, Crypto::SignedBigInteger nanoseconds, Value relative_to);
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ThrowCompletionOr<Duration*> difference_temporal_zoned_date_time(VM&, DifferenceOperation, ZonedDateTime&, Value other, Value options);
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ThrowCompletionOr<ZonedDateTime*> add_duration_to_or_subtract_duration_from_zoned_date_time(VM&, ArithmeticOperation, ZonedDateTime&, Value temporal_duration_like, Value options_value);
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}
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