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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.
241 lines
10 KiB
C++
241 lines
10 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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#include <AK/Time.h>
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#include <LibCrypto/BigInt/SignedBigInteger.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/Date.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Temporal/Calendar.h>
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#include <LibJS/Runtime/Temporal/Instant.h>
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#include <LibJS/Runtime/Temporal/Now.h>
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#include <LibJS/Runtime/Temporal/PlainDate.h>
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#include <LibJS/Runtime/Temporal/PlainDateTime.h>
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#include <LibJS/Runtime/Temporal/PlainTime.h>
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#include <LibJS/Runtime/Temporal/TimeZone.h>
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#include <LibJS/Runtime/Temporal/ZonedDateTime.h>
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namespace JS::Temporal {
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JS_DEFINE_ALLOCATOR(Now);
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// 2 The Temporal.Now Object, https://tc39.es/proposal-temporal/#sec-temporal-now-object
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Now::Now(Realm& realm)
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: Object(ConstructWithPrototypeTag::Tag, realm.intrinsics().object_prototype())
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{
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}
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void Now::initialize(Realm& realm)
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{
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Base::initialize(realm);
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auto& vm = this->vm();
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// 2.1.1 Temporal.Now [ @@toStringTag ], https://tc39.es/proposal-temporal/#sec-temporal-now-@@tostringtag
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define_direct_property(vm.well_known_symbol_to_string_tag(), PrimitiveString::create(vm, "Temporal.Now"_string), Attribute::Configurable);
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(realm, vm.names.timeZone, time_zone, 0, attr);
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define_native_function(realm, vm.names.instant, instant, 0, attr);
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define_native_function(realm, vm.names.plainDateTime, plain_date_time, 1, attr);
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define_native_function(realm, vm.names.plainDateTimeISO, plain_date_time_iso, 0, attr);
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define_native_function(realm, vm.names.zonedDateTime, zoned_date_time, 1, attr);
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define_native_function(realm, vm.names.zonedDateTimeISO, zoned_date_time_iso, 0, attr);
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define_native_function(realm, vm.names.plainDate, plain_date, 1, attr);
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define_native_function(realm, vm.names.plainDateISO, plain_date_iso, 0, attr);
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define_native_function(realm, vm.names.plainTimeISO, plain_time_iso, 0, attr);
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}
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// 2.2.1 Temporal.Now.timeZone ( ), https://tc39.es/proposal-temporal/#sec-temporal.now.timezone
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JS_DEFINE_NATIVE_FUNCTION(Now::time_zone)
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{
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// 1. Return ! SystemTimeZone().
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return system_time_zone(vm);
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}
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// 2.2.2 Temporal.Now.instant ( ), https://tc39.es/proposal-temporal/#sec-temporal.now.instant
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JS_DEFINE_NATIVE_FUNCTION(Now::instant)
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{
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// 1. Return ! SystemInstant().
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return system_instant(vm);
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}
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// 2.2.3 Temporal.Now.plainDateTime ( calendarLike [ , temporalTimeZoneLike ] ), https://tc39.es/proposal-temporal/#sec-temporal.now.plaindatetime
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JS_DEFINE_NATIVE_FUNCTION(Now::plain_date_time)
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{
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auto calendar_like = vm.argument(0);
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auto temporal_time_zone_like = vm.argument(1);
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// 1. Return ? SystemDateTime(temporalTimeZoneLike, calendarLike).
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return TRY(system_date_time(vm, temporal_time_zone_like, calendar_like));
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}
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// 2.2.4 Temporal.Now.plainDateTimeISO ( [ temporalTimeZoneLike ] ), https://tc39.es/proposal-temporal/#sec-temporal.now.plaindatetimeiso
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JS_DEFINE_NATIVE_FUNCTION(Now::plain_date_time_iso)
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{
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auto temporal_time_zone_like = vm.argument(0);
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// 1, Let calendar be ! GetISO8601Calendar().
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auto* calendar = get_iso8601_calendar(vm);
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// 2. Return ? SystemDateTime(temporalTimeZoneLike, calendar).
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return TRY(system_date_time(vm, temporal_time_zone_like, calendar));
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}
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// 2.2.5 Temporal.Now.zonedDateTime ( calendarLike [ , temporalTimeZoneLike ] ), https://tc39.es/proposal-temporal/#sec-temporal.now.zoneddatetime
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JS_DEFINE_NATIVE_FUNCTION(Now::zoned_date_time)
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{
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auto calendar_like = vm.argument(0);
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auto temporal_time_zone_like = vm.argument(1);
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// 1. Return ? SystemZonedDateTime(temporalTimeZoneLike, calendarLike).
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return TRY(system_zoned_date_time(vm, temporal_time_zone_like, calendar_like));
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}
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// 2.2.6 Temporal.Now.zonedDateTimeISO ( [ temporalTimeZoneLike ] ), https://tc39.es/proposal-temporal/#sec-temporal.now.zoneddatetimeiso
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JS_DEFINE_NATIVE_FUNCTION(Now::zoned_date_time_iso)
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{
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auto temporal_time_zone_like = vm.argument(0);
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// 1, Let calendar be ! GetISO8601Calendar().
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auto* calendar = get_iso8601_calendar(vm);
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// 2. Return ? SystemZonedDateTime(temporalTimeZoneLike, calendar).
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return TRY(system_zoned_date_time(vm, temporal_time_zone_like, calendar));
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}
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// 2.2.7 Temporal.Now.plainDate ( calendarLike [ , temporalTimeZoneLike ] ), https://tc39.es/proposal-temporal/#sec-temporal.now.plaindate
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JS_DEFINE_NATIVE_FUNCTION(Now::plain_date)
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{
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auto calendar_like = vm.argument(0);
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auto temporal_time_zone_like = vm.argument(1);
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// 1. Let dateTime be ? SystemDateTime(temporalTimeZoneLike, calendarLike).
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auto* date_time = TRY(system_date_time(vm, temporal_time_zone_like, calendar_like));
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// 2. Return ! CreateTemporalDate(dateTime.[[ISOYear]], dateTime.[[ISOMonth]], dateTime.[[ISODay]], dateTime.[[Calendar]]).
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return MUST(create_temporal_date(vm, date_time->iso_year(), date_time->iso_month(), date_time->iso_day(), date_time->calendar()));
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}
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// 2.2.8 Temporal.Now.plainDateISO ( [ temporalTimeZoneLike ] ), https://tc39.es/proposal-temporal/#sec-temporal.now.plaindateiso
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JS_DEFINE_NATIVE_FUNCTION(Now::plain_date_iso)
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{
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auto temporal_time_zone_like = vm.argument(0);
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// 1. Let calendar be ! GetISO8601Calendar().
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auto* calendar = get_iso8601_calendar(vm);
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// 2. Let dateTime be ? SystemDateTime(temporalTimeZoneLike, calendar).
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auto* date_time = TRY(system_date_time(vm, temporal_time_zone_like, calendar));
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// 3. Return ! CreateTemporalDate(dateTime.[[ISOYear]], dateTime.[[ISOMonth]], dateTime.[[ISODay]], dateTime.[[Calendar]]).
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return MUST(create_temporal_date(vm, date_time->iso_year(), date_time->iso_month(), date_time->iso_day(), date_time->calendar()));
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}
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// 2.2.9 Temporal.Now.plainTimeISO ( [ temporalTimeZoneLike ] ), https://tc39.es/proposal-temporal/#sec-temporal.now.plaintimeiso
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JS_DEFINE_NATIVE_FUNCTION(Now::plain_time_iso)
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{
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auto temporal_time_zone_like = vm.argument(0);
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// 1. Let calendar be ! GetISO8601Calendar().
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auto* calendar = get_iso8601_calendar(vm);
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// 2. Let dateTime be ? SystemDateTime(temporalTimeZoneLike, calendar).
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auto* date_time = TRY(system_date_time(vm, temporal_time_zone_like, calendar));
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// 3. Return ! CreateTemporalTime(dateTime.[[ISOHour]], dateTime.[[ISOMinute]], dateTime.[[ISOSecond]], dateTime.[[ISOMillisecond]], dateTime.[[ISOMicrosecond]], dateTime.[[ISONanosecond]]).
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return MUST(create_temporal_time(vm, date_time->iso_hour(), date_time->iso_minute(), date_time->iso_second(), date_time->iso_millisecond(), date_time->iso_microsecond(), date_time->iso_nanosecond()));
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}
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// 2.3.1 SystemTimeZone ( ), https://tc39.es/proposal-temporal/#sec-temporal-systemtimezone
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TimeZone* system_time_zone(VM& vm)
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{
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// 1. Let identifier be ! DefaultTimeZone().
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auto identifier = system_time_zone_identifier();
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// 2. Return ! CreateTemporalTimeZone(identifier).
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// FIXME: Propagate possible OOM error
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return MUST(create_temporal_time_zone(vm, identifier));
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}
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// 2.3.2 SystemUTCEpochNanoseconds ( ), https://tc39.es/proposal-temporal/#sec-temporal-systemutcepochnanoseconds
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BigInt* system_utc_epoch_nanoseconds(VM& vm)
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{
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// 1. Let ns be the approximate current UTC date and time, in nanoseconds since the epoch.
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auto now = AK::UnixDateTime::now().nanoseconds_since_epoch();
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auto ns = Crypto::SignedBigInteger { now };
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// 2. Set ns to the result of clamping ns between nsMinInstant and nsMaxInstant.
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// NOTE: Duration::to_nanoseconds() already clamps between -(2^63) and 2^63 - 1, the range of an i64,
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// if an overflow occurs during seconds -> nanoseconds conversion.
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// 3. Return ℤ(ns).
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return BigInt::create(vm, move(ns));
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}
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// 2.3.3 SystemInstant ( ), https://tc39.es/proposal-temporal/#sec-temporal-systeminstant
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Instant* system_instant(VM& vm)
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{
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// 1. Let ns be ! SystemUTCEpochNanoseconds().
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auto* ns = system_utc_epoch_nanoseconds(vm);
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// 2. Return ! CreateTemporalInstant(ns).
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return MUST(create_temporal_instant(vm, *ns));
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}
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// 2.3.4 SystemDateTime ( temporalTimeZoneLike, calendarLike ), https://tc39.es/proposal-temporal/#sec-temporal-systemdatetime
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ThrowCompletionOr<PlainDateTime*> system_date_time(VM& vm, Value temporal_time_zone_like, Value calendar_like)
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{
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Object* time_zone;
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// 1. If temporalTimeZoneLike is undefined, then
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if (temporal_time_zone_like.is_undefined()) {
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// a. Let timeZone be ! SystemTimeZone().
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time_zone = system_time_zone(vm);
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}
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// 2. Else,
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else {
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// a. Let timeZone be ? ToTemporalTimeZone(temporalTimeZoneLike).
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time_zone = TRY(to_temporal_time_zone(vm, temporal_time_zone_like));
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}
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// 3. Let calendar be ? ToTemporalCalendar(calendarLike).
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auto* calendar = TRY(to_temporal_calendar(vm, calendar_like));
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// 4. Let instant be ! SystemInstant().
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auto* instant = system_instant(vm);
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// 5. Return ? BuiltinTimeZoneGetPlainDateTimeFor(timeZone, instant, calendar).
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return builtin_time_zone_get_plain_date_time_for(vm, time_zone, *instant, *calendar);
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}
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// 2.3.5 SystemZonedDateTime ( temporalTimeZoneLike, calendarLike ), https://tc39.es/proposal-temporal/#sec-temporal-systemzoneddatetime
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ThrowCompletionOr<ZonedDateTime*> system_zoned_date_time(VM& vm, Value temporal_time_zone_like, Value calendar_like)
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{
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Object* time_zone;
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// 1. If temporalTimeZoneLike is undefined, then
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if (temporal_time_zone_like.is_undefined()) {
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// a. Let timeZone be ! SystemTimeZone().
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time_zone = system_time_zone(vm);
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}
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// 2. Else,
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else {
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// a. Let timeZone be ? ToTemporalTimeZone(temporalTimeZoneLike).
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time_zone = TRY(to_temporal_time_zone(vm, temporal_time_zone_like));
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}
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// 3. Let calendar be ? ToTemporalCalendar(calendarLike).
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auto* calendar = TRY(to_temporal_calendar(vm, calendar_like));
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// 4. Let ns be ! SystemUTCEpochNanoseconds().
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auto* ns = system_utc_epoch_nanoseconds(vm);
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// 5. Return ? CreateTemporalZonedDateTime(ns, timeZone, calendar).
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return create_temporal_zoned_date_time(vm, *ns, *time_zone, *calendar);
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}
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}
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