LibJS: Segregate GC-allocated objects by type

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.

Userland/Libraries/LibJS/Runtime/Temporal/Calendar.cpp

@@ -27,6 +27,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(Calendar);
+
 // 12 Temporal.Calendar Objects, https://tc39.es/proposal-temporal/#sec-temporal-calendar-objects
 Calendar::Calendar(String identifier, Object& prototype)
     : Object(ConstructWithPrototypeTag::Tag, prototype)

Userland/Libraries/LibJS/Runtime/Temporal/Calendar.h

@@ -18,6 +18,7 @@ namespace JS::Temporal {
 
 class Calendar final : public Object {
     JS_OBJECT(Calendar, Object);
+    JS_DECLARE_ALLOCATOR(Calendar);
 
 public:
     virtual ~Calendar() override = default;

Userland/Libraries/LibJS/Runtime/Temporal/CalendarConstructor.cpp

@@ -10,6 +10,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(CalendarConstructor);
+
 // 12.2 The Temporal.Calendar Constructor, https://tc39.es/proposal-temporal/#sec-temporal-calendar-constructor
 CalendarConstructor::CalendarConstructor(Realm& realm)
     : NativeFunction(realm.vm().names.Calendar.as_string(), realm.intrinsics().function_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/CalendarConstructor.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class CalendarConstructor final : public NativeFunction {
     JS_OBJECT(CalendarConstructor, NativeFunction);
+    JS_DECLARE_ALLOCATOR(CalendarConstructor);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.cpp

@@ -19,6 +19,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(CalendarPrototype);
+
 [[nodiscard]] static i32 iso_year(Object& temporal_object);
 [[nodiscard]] static u8 iso_month(Object& temporal_object);
 [[nodiscard]] static u8 iso_day(Object& temporal_object);

Userland/Libraries/LibJS/Runtime/Temporal/CalendarPrototype.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class CalendarPrototype final : public PrototypeObject<CalendarPrototype, Calendar> {
     JS_PROTOTYPE_OBJECT(CalendarPrototype, Calendar, Temporal.Calendar);
+    JS_DECLARE_ALLOCATOR(CalendarPrototype);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/Duration.cpp

@@ -23,6 +23,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(Duration);
+
 // 7 Temporal.Duration Objects, https://tc39.es/proposal-temporal/#sec-temporal-duration-objects
 Duration::Duration(double years, double months, double weeks, double days, double hours, double minutes, double seconds, double milliseconds, double microseconds, double nanoseconds, Object& prototype)
     : Object(ConstructWithPrototypeTag::Tag, prototype)

Userland/Libraries/LibJS/Runtime/Temporal/Duration.h

@@ -19,6 +19,7 @@ namespace JS::Temporal {
 
 class Duration final : public Object {
     JS_OBJECT(Duration, Object);
+    JS_DECLARE_ALLOCATOR(Duration);
 
 public:
     virtual ~Duration() override = default;

Userland/Libraries/LibJS/Runtime/Temporal/DurationConstructor.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class DurationConstructor final : public NativeFunction {
     JS_OBJECT(DurationConstructor, NativeFunction);
+    JS_DECLARE_ALLOCATOR(DurationConstructor);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp

@@ -14,6 +14,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(DurationPrototype);
+
 // 7.3 Properties of the Temporal.Duration Prototype Object, https://tc39.es/proposal-temporal/#sec-properties-of-the-temporal-duration-prototype-object
 DurationPrototype::DurationPrototype(Realm& realm)
     : PrototypeObject(realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class DurationPrototype final : public PrototypeObject<DurationPrototype, Duration> {
     JS_PROTOTYPE_OBJECT(DurationPrototype, Duration, Temporal.Duration);
+    JS_DECLARE_ALLOCATOR(DurationPrototype);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/Instant.cpp

@@ -22,6 +22,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(Instant);
+
 // 8 Temporal.Instant Objects, https://tc39.es/proposal-temporal/#sec-temporal-instant-objects
 Instant::Instant(BigInt const& nanoseconds, Object& prototype)
     : Object(ConstructWithPrototypeTag::Tag, prototype)

Userland/Libraries/LibJS/Runtime/Temporal/Instant.h

@@ -18,6 +18,7 @@ namespace JS::Temporal {
 
 class Instant final : public Object {
     JS_OBJECT(Instant, Object);
+    JS_DECLARE_ALLOCATOR(Instant);
 
 public:
     virtual ~Instant() override = default;

Userland/Libraries/LibJS/Runtime/Temporal/InstantConstructor.cpp

@@ -13,6 +13,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(InstantConstructor);
+
 // 8.1 The Temporal.Instant Constructor, https://tc39.es/proposal-temporal/#sec-temporal-instant-constructor
 InstantConstructor::InstantConstructor(Realm& realm)
     : NativeFunction(realm.vm().names.Instant.as_string(), realm.intrinsics().function_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/InstantConstructor.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class InstantConstructor final : public NativeFunction {
     JS_OBJECT(InstantConstructor, NativeFunction);
+    JS_DECLARE_ALLOCATOR(InstantConstructor);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.cpp

@@ -18,6 +18,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(InstantPrototype);
+
 // 8.3 Properties of the Temporal.Instant Prototype Object, https://tc39.es/proposal-temporal/#sec-properties-of-the-temporal-instant-prototype-object
 InstantPrototype::InstantPrototype(Realm& realm)
     : PrototypeObject(realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/InstantPrototype.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class InstantPrototype final : public PrototypeObject<InstantPrototype, Instant> {
     JS_PROTOTYPE_OBJECT(InstantPrototype, Instant, Temporal.Instant);
+    JS_DECLARE_ALLOCATOR(InstantPrototype);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/Now.cpp

@@ -20,6 +20,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(Now);
+
 // 2 The Temporal.Now Object, https://tc39.es/proposal-temporal/#sec-temporal-now-object
 Now::Now(Realm& realm)
     : Object(ConstructWithPrototypeTag::Tag, realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/Now.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class Now final : public Object {
     JS_OBJECT(Now, Object);
+    JS_DECLARE_ALLOCATOR(Now);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/PlainDate.cpp

@@ -22,6 +22,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainDate);
+
 // 3 Temporal.PlainDate Objects, https://tc39.es/proposal-temporal/#sec-temporal-plaindate-objects
 PlainDate::PlainDate(i32 year, u8 month, u8 day, Object& calendar, Object& prototype)
     : Object(ConstructWithPrototypeTag::Tag, prototype)

Userland/Libraries/LibJS/Runtime/Temporal/PlainDate.h

@@ -16,6 +16,7 @@ namespace JS::Temporal {
 
 class PlainDate final : public Object {
     JS_OBJECT(PlainDate, Object);
+    JS_DECLARE_ALLOCATOR(PlainDate);
 
 public:
     virtual ~PlainDate() override = default;

Userland/Libraries/LibJS/Runtime/Temporal/PlainDateConstructor.cpp

@@ -14,6 +14,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainDateConstructor);
+
 // 3.1 The Temporal.PlainDate Constructor, https://tc39.es/proposal-temporal/#sec-temporal-plaindate-constructor
 PlainDateConstructor::PlainDateConstructor(Realm& realm)
     : NativeFunction(realm.vm().names.PlainDate.as_string(), realm.intrinsics().function_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/PlainDateConstructor.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class PlainDateConstructor final : public NativeFunction {
     JS_OBJECT(PlainDateConstructor, NativeFunction);
+    JS_DECLARE_ALLOCATOR(PlainDateConstructor);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp

@@ -19,6 +19,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainDatePrototype);
+
 // 3.3 Properties of the Temporal.PlainDate Prototype Object, https://tc39.es/proposal-temporal/#sec-properties-of-the-temporal-plaindate-prototype-object
 PlainDatePrototype::PlainDatePrototype(Realm& realm)
     : PrototypeObject(realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class PlainDatePrototype final : public PrototypeObject<PlainDatePrototype, PlainDate> {
     JS_PROTOTYPE_OBJECT(PlainDatePrototype, PlainDate, Temporal.PlainDate);
+    JS_DECLARE_ALLOCATOR(PlainDatePrototype);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTime.cpp

@@ -23,6 +23,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainDateTime);
+
 // 5 Temporal.PlainDateTime Objects, https://tc39.es/proposal-temporal/#sec-temporal-plaindatetime-objects
 PlainDateTime::PlainDateTime(i32 iso_year, u8 iso_month, u8 iso_day, u8 iso_hour, u8 iso_minute, u8 iso_second, u16 iso_millisecond, u16 iso_microsecond, u16 iso_nanosecond, Object& calendar, Object& prototype)
     : Object(ConstructWithPrototypeTag::Tag, prototype)

Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTime.h

@@ -17,6 +17,7 @@ namespace JS::Temporal {
 
 class PlainDateTime final : public Object {
     JS_OBJECT(PlainDateTime, Object);
+    JS_DECLARE_ALLOCATOR(PlainDateTime);
 
 public:
     virtual ~PlainDateTime() override = default;

Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimeConstructor.cpp

@@ -14,6 +14,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainDateTimeConstructor);
+
 // 5.1 The Temporal.PlainDateTime Constructor, https://tc39.es/proposal-temporal/#sec-temporal-plaindatetime-constructor
 PlainDateTimeConstructor::PlainDateTimeConstructor(Realm& realm)
     : NativeFunction(realm.vm().names.PlainDateTime.as_string(), realm.intrinsics().function_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimeConstructor.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class PlainDateTimeConstructor final : public NativeFunction {
     JS_OBJECT(PlainDateTimeConstructor, NativeFunction);
+    JS_DECLARE_ALLOCATOR(PlainDateTimeConstructor);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp

@@ -20,6 +20,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainDateTimePrototype);
+
 // 5.3 Properties of the Temporal.PlainDateTime Prototype Object, https://tc39.es/proposal-temporal/#sec-properties-of-the-temporal-plaindatetime-prototype-object
 PlainDateTimePrototype::PlainDateTimePrototype(Realm& realm)
     : PrototypeObject(realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class PlainDateTimePrototype final : public PrototypeObject<PlainDateTimePrototype, PlainDateTime> {
     JS_PROTOTYPE_OBJECT(PlainDateTimePrototype, PlainDateTime, Temporal.PlainDateTime);
+    JS_DECLARE_ALLOCATOR(PlainDateTimePrototype);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/PlainMonthDay.cpp

@@ -18,6 +18,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainMonthDay);
+
 // 10 Temporal.PlainMonthDay Objects, https://tc39.es/proposal-temporal/#sec-temporal-plainmonthday-objects
 PlainMonthDay::PlainMonthDay(u8 iso_month, u8 iso_day, i32 iso_year, Object& calendar, Object& prototype)
     : Object(ConstructWithPrototypeTag::Tag, prototype)

Userland/Libraries/LibJS/Runtime/Temporal/PlainMonthDay.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class PlainMonthDay final : public Object {
     JS_OBJECT(PlainMonthDay, Object);
+    JS_DECLARE_ALLOCATOR(PlainMonthDay);
 
 public:
     virtual ~PlainMonthDay() override = default;

Userland/Libraries/LibJS/Runtime/Temporal/PlainMonthDayConstructor.cpp

@@ -13,6 +13,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainMonthDayConstructor);
+
 // 10.1 The Temporal.PlainMonthDay Constructor, https://tc39.es/proposal-temporal/#sec-temporal-plainmonthday-constructor
 PlainMonthDayConstructor::PlainMonthDayConstructor(Realm& realm)
     : NativeFunction(realm.vm().names.PlainMonthDay.as_string(), realm.intrinsics().function_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/PlainMonthDayConstructor.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class PlainMonthDayConstructor final : public NativeFunction {
     JS_OBJECT(PlainMonthDayConstructor, NativeFunction);
+    JS_DECLARE_ALLOCATOR(PlainMonthDayConstructor);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/PlainMonthDayPrototype.cpp

@@ -14,6 +14,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainMonthDayPrototype);
+
 // 10.3 Properties of the Temporal.PlainMonthDay Prototype Object, https://tc39.es/proposal-temporal/#sec-properties-of-the-temporal-plainmonthday-prototype-object
 PlainMonthDayPrototype::PlainMonthDayPrototype(Realm& realm)
     : PrototypeObject(realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/PlainMonthDayPrototype.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class PlainMonthDayPrototype final : public PrototypeObject<PlainMonthDayPrototype, PlainMonthDay> {
     JS_PROTOTYPE_OBJECT(PlainMonthDayPrototype, PlainMonthDay, Temporal.PlainMonthDay);
+    JS_DECLARE_ALLOCATOR(PlainMonthDayPrototype);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/PlainTime.cpp

@@ -22,6 +22,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainTime);
+
 // 4 Temporal.PlainTime Objects, https://tc39.es/proposal-temporal/#sec-temporal-plaintime-objects
 PlainTime::PlainTime(u8 iso_hour, u8 iso_minute, u8 iso_second, u16 iso_millisecond, u16 iso_microsecond, u16 iso_nanosecond, Calendar& calendar, Object& prototype)
     : Object(ConstructWithPrototypeTag::Tag, prototype)

Userland/Libraries/LibJS/Runtime/Temporal/PlainTime.h

@@ -17,6 +17,7 @@ namespace JS::Temporal {
 
 class PlainTime final : public Object {
     JS_OBJECT(PlainDateTime, Object);
+    JS_DECLARE_ALLOCATOR(PlainTime);
 
 public:
     virtual ~PlainTime() override = default;

Userland/Libraries/LibJS/Runtime/Temporal/PlainTimeConstructor.cpp

@@ -12,6 +12,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainTimeConstructor);
+
 // 4.1 The Temporal.PlainTime Constructor, https://tc39.es/proposal-temporal/#sec-temporal-plaintime-constructor
 PlainTimeConstructor::PlainTimeConstructor(Realm& realm)
     : NativeFunction(realm.vm().names.PlainTime.as_string(), realm.intrinsics().function_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/PlainTimeConstructor.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class PlainTimeConstructor final : public NativeFunction {
     JS_OBJECT(PlainTimeConstructor, NativeFunction);
+    JS_DECLARE_ALLOCATOR(PlainTimeConstructor);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/PlainTimePrototype.cpp

@@ -19,6 +19,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainTimePrototype);
+
 // 4.3 Properties of the Temporal.PlainTime Prototype Object, https://tc39.es/proposal-temporal/#sec-properties-of-the-temporal-plaintime-prototype-object
 PlainTimePrototype::PlainTimePrototype(Realm& realm)
     : PrototypeObject(realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/PlainTimePrototype.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class PlainTimePrototype final : public PrototypeObject<PlainTimePrototype, PlainTime> {
     JS_PROTOTYPE_OBJECT(PlainTimePrototype, PlainTime, Temporal.PlainTime);
+    JS_DECLARE_ALLOCATOR(PlainTimePrototype);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonth.cpp

@@ -17,6 +17,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainYearMonth);
+
 // 9 Temporal.PlainYearMonth Objects, https://tc39.es/proposal-temporal/#sec-temporal-plainyearmonth-objects
 PlainYearMonth::PlainYearMonth(i32 iso_year, u8 iso_month, u8 iso_day, Object& calendar, Object& prototype)
     : Object(ConstructWithPrototypeTag::Tag, prototype)

Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonth.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class PlainYearMonth final : public Object {
     JS_OBJECT(PlainYearMonth, Object);
+    JS_DECLARE_ALLOCATOR(PlainYearMonth);
 
 public:
     virtual ~PlainYearMonth() override = default;

Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthConstructor.cpp

@@ -14,6 +14,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainYearMonthConstructor);
+
 // 9.1 The Temporal.PlainYearMonth Constructor, https://tc39.es/proposal-temporal/#sec-temporal-plainyearmonth-constructor
 PlainYearMonthConstructor::PlainYearMonthConstructor(Realm& realm)
     : NativeFunction(realm.vm().names.PlainYearMonth.as_string(), realm.intrinsics().function_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthConstructor.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class PlainYearMonthConstructor final : public NativeFunction {
     JS_OBJECT(PlainYearMonthConstructor, NativeFunction);
+    JS_DECLARE_ALLOCATOR(PlainYearMonthConstructor);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.cpp

@@ -16,6 +16,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(PlainYearMonthPrototype);
+
 // 9.3 Properties of the Temporal.PlainYearMonth Prototype Object, https://tc39.es/proposal-temporal/#sec-properties-of-the-temporal-plainyearmonth-prototype-object
 PlainYearMonthPrototype::PlainYearMonthPrototype(Realm& realm)
     : PrototypeObject(realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class PlainYearMonthPrototype final : public PrototypeObject<PlainYearMonthPrototype, PlainYearMonth> {
     JS_PROTOTYPE_OBJECT(PlainYearMonthPrototype, PlainYearMonth, Temporal.PlainYearMonth);
+    JS_DECLARE_ALLOCATOR(PlainYearMonthPrototype);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/Temporal.cpp

@@ -20,6 +20,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(Temporal);
+
 // 1 The Temporal Object, https://tc39.es/proposal-temporal/#sec-temporal-objects
 Temporal::Temporal(Realm& realm)
     : Object(ConstructWithPrototypeTag::Tag, realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/Temporal.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class Temporal final : public Object {
     JS_OBJECT(Temporal, Object);
+    JS_DECLARE_ALLOCATOR(Temporal);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/TimeZone.cpp

@@ -22,6 +22,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(TimeZone);
+
 // 11 Temporal.TimeZone Objects, https://tc39.es/proposal-temporal/#sec-temporal-timezone-objects
 TimeZone::TimeZone(Object& prototype)
     : Object(ConstructWithPrototypeTag::Tag, prototype)

Userland/Libraries/LibJS/Runtime/Temporal/TimeZone.h

@@ -15,6 +15,7 @@ namespace JS::Temporal {
 
 class TimeZone final : public Object {
     JS_OBJECT(TimeZone, Object);
+    JS_DECLARE_ALLOCATOR(TimeZone);
 
 public:
     // Needs to store values in the range -8.64 * 10^13 to 8.64 * 10^13

Userland/Libraries/LibJS/Runtime/Temporal/TimeZoneConstructor.cpp

@@ -11,6 +11,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(TimeZoneConstructor);
+
 // 11.2 The Temporal.TimeZone Constructor, https://tc39.es/proposal-temporal/#sec-temporal-timezone-constructor
 TimeZoneConstructor::TimeZoneConstructor(Realm& realm)
     : NativeFunction(realm.vm().names.TimeZone.as_string(), realm.intrinsics().function_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/TimeZoneConstructor.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class TimeZoneConstructor final : public NativeFunction {
     JS_OBJECT(TimeZoneConstructor, NativeFunction);
+    JS_DECLARE_ALLOCATOR(TimeZoneConstructor);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/TimeZonePrototype.cpp

@@ -17,6 +17,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(TimeZonePrototype);
+
 // 11.4 Properties of the Temporal.TimeZone Prototype Object, https://tc39.es/proposal-temporal/#sec-properties-of-the-temporal-timezone-prototype-object
 TimeZonePrototype::TimeZonePrototype(Realm& realm)
     : PrototypeObject(realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/TimeZonePrototype.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class TimeZonePrototype final : public PrototypeObject<TimeZonePrototype, TimeZone> {
     JS_PROTOTYPE_OBJECT(TimeZonePrototype, TimeZone, Temporal.TimeZone);
+    JS_DECLARE_ALLOCATOR(TimeZonePrototype);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.cpp

@@ -20,6 +20,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(ZonedDateTime);
+
 // 6 Temporal.ZonedDateTime Objects, https://tc39.es/proposal-temporal/#sec-temporal-zoneddatetime-objects
 ZonedDateTime::ZonedDateTime(BigInt const& nanoseconds, Object& time_zone, Object& calendar, Object& prototype)
     : Object(ConstructWithPrototypeTag::Tag, prototype)

Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTime.h

@@ -14,6 +14,7 @@ namespace JS::Temporal {
 
 class ZonedDateTime final : public Object {
     JS_OBJECT(ZonedDateTime, Object);
+    JS_DECLARE_ALLOCATOR(ZonedDateTime);
 
 public:
     virtual ~ZonedDateTime() override = default;

Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.cpp

@@ -15,6 +15,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(ZonedDateTimeConstructor);
+
 // 6.1 The Temporal.ZonedDateTime Constructor, https://tc39.es/proposal-temporal/#sec-temporal-zoneddatetime-constructor
 ZonedDateTimeConstructor::ZonedDateTimeConstructor(Realm& realm)
     : NativeFunction(realm.vm().names.ZonedDateTime.as_string(), realm.intrinsics().function_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimeConstructor.h

@@ -12,6 +12,7 @@ namespace JS::Temporal {
 
 class ZonedDateTimeConstructor final : public NativeFunction {
     JS_OBJECT(ZonedDateTimeConstructor, NativeFunction);
+    JS_DECLARE_ALLOCATOR(ZonedDateTimeConstructor);
 
 public:
     virtual void initialize(Realm&) override;

Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp

@@ -20,6 +20,8 @@
 
 namespace JS::Temporal {
 
+JS_DEFINE_ALLOCATOR(ZonedDateTimePrototype);
+
 // 6.3 Properties of the Temporal.ZonedDateTime Prototype Object, https://tc39.es/proposal-temporal/#sec-properties-of-the-temporal-zoneddatetime-prototype-object
 ZonedDateTimePrototype::ZonedDateTimePrototype(Realm& realm)
     : PrototypeObject(realm.intrinsics().object_prototype())

Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.h

@@ -13,6 +13,7 @@ namespace JS::Temporal {
 
 class ZonedDateTimePrototype final : public PrototypeObject<ZonedDateTimePrototype, ZonedDateTime> {
     JS_PROTOTYPE_OBJECT(ZonedDateTimePrototype, ZonedDateTime, Temporal.ZonedDateTime);
+    JS_DECLARE_ALLOCATOR(ZonedDateTimePrototype);
 
 public:
     virtual void initialize(Realm&) override;