[Concurrency] Fix ptrauth value for __ptrauth_swift_escalation_notification_function

Previously these records were not used at all, so changing this has no
impact on existing runtimes. Note that we changedd the FunctionType
because the previous one was slightly incorrect -- the context comes
LAST in the type, not first.

Author: ktoso

include/swift/ABI/MetadataValues.h

@@ -1678,7 +1678,7 @@ namespace SpecialPointerAuthDiscriminators {
   const uint16_t AsyncContextResume = 0xd707; // = 55047
   const uint16_t AsyncContextYield = 0xe207; // = 57863
   const uint16_t CancellationNotificationFunction = 0x1933; // = 6451
-  const uint16_t EscalationNotificationFunction = 0x5be4; // = 23524
+  const uint16_t EscalationNotificationFunction = 0xf59d; // = 62877
   const uint16_t AsyncThinNullaryFunction = 0x0f08; // = 3848
   const uint16_t AsyncFutureFunction = 0x720f; // = 29199
 

stdlib/public/Concurrency/Task.cpp

@@ -1773,7 +1773,7 @@ swift_task_addPriorityEscalationHandlerImpl(
     void *context) {
   void *allocation =
       swift_task_alloc(sizeof(EscalationNotificationStatusRecord));
-  auto unsigned_handler = swift_auth_code(handler, 3848); // FIXME: fix this number for ptrauth
+  auto unsigned_handler = swift_auth_code(handler, 62877);
   auto *record = ::new (allocation)
       EscalationNotificationStatusRecord(handler, context);
 

stdlib/public/Concurrency/Task.swift

@@ -994,26 +994,12 @@ public func withTaskPriorityEscalationHandler<T, E>(
   let handler0: (UInt8) -> Void = {
     handler(TaskPriority(rawValue: $0))
   }
-  let record = _taskaddPriorityEscalationHandler(handler: handler0)
-  defer { _taskremovePriorityEscalationHandler(record: record) }
+  let record = _taskAddPriorityEscalationHandler(handler: handler0)
+  defer { _taskRemovePriorityEscalationHandler(record: record) }
 
   return try await operation()
 }
 
-@usableFromInline
-@available(SwiftStdlib 9999, *)
-@_silgen_name("swift_task_addPriorityEscalationHandler")
-func _taskaddPriorityEscalationHandler(
-  handler: (UInt8) -> Void
-) -> UnsafeRawPointer /*EscalationNotificationStatusRecord*/
-
-@usableFromInline
-@available(SwiftStdlib 9999, *)
-@_silgen_name("swift_task_removePriorityEscalationHandler")
-func _taskremovePriorityEscalationHandler(
-  record: UnsafeRawPointer /*EscalationNotificationStatusRecord*/
-)
-
 // ==== UnsafeCurrentTask ------------------------------------------------------
 
 /// Calls a closure with an unsafe reference to the current task.
@@ -1185,6 +1171,20 @@ func _enqueueJobGlobalWithDeadline(_ seconds: Int64, _ nanoseconds: Int64,
                                    _ toleranceSec: Int64, _ toleranceNSec: Int64,
                                    _ clock: Int32, _ task: Builtin.Job)
 
+@usableFromInline
+@available(SwiftStdlib 9999, *)
+@_silgen_name("swift_task_addPriorityEscalationHandler")
+func _taskAddPriorityEscalationHandler(
+  handler: (UInt8) -> Void
+) -> UnsafeRawPointer /*EscalationNotificationStatusRecord*/
+
+@usableFromInline
+@available(SwiftStdlib 9999, *)
+@_silgen_name("swift_task_removePriorityEscalationHandler")
+func _taskRemovePriorityEscalationHandler(
+  record: UnsafeRawPointer /*EscalationNotificationStatusRecord*/
+)
+
 @available(SwiftStdlib 5.1, *)
 @usableFromInline
 @_silgen_name("swift_task_asyncMainDrainQueue")

test/Concurrency/async_task_escalate_priority.swift

@@ -19,7 +19,7 @@
 // UNSUPPORTED: DARWIN_SIMULATOR=ios
 // UNSUPPORTED: DARWIN_SIMULATOR=tvos
 
-// rdar://107390341 - Temporarily disable for arm64e
+// rdar://107390341 - Because task escalation tests seem disabled on this platform
 // UNSUPPORTED: CPU=arm64e
 
 import Darwin