Merge pull request swiftlang#81229 from ktoso/wip-escalation-handler-priority-auth

[Concurrency] Fix ptr auth for task priority escalation handler

Author: ktoso

include/swift/ABI/MetadataValues.h

@@ -1745,7 +1745,7 @@ namespace SpecialPointerAuthDiscriminators {
   const uint16_t AsyncContextParent = 0xbda2; // = 48546
   const uint16_t AsyncContextResume = 0xd707; // = 55047
   const uint16_t AsyncContextYield = 0xe207; // = 57863
-  const uint16_t CancellationNotificationFunction = 0x1933; // = 6451
+  const uint16_t CancellationNotificationFunction = 0x2E3F; // = 11839 (TaskPriority, TaskPriority) -> Void
   const uint16_t EscalationNotificationFunction = 0x7861; // = 30817
   const uint16_t AsyncThinNullaryFunction = 0x0f08; // = 3848
   const uint16_t AsyncFutureFunction = 0x720f; // = 29199

stdlib/public/Concurrency/Task.cpp

@@ -1812,8 +1812,9 @@ swift_task_addPriorityEscalationHandlerImpl(
     void *context) {
   void *allocation =
       swift_task_alloc(sizeof(EscalationNotificationStatusRecord));
+  auto unsigned_handler = swift_auth_code(handler, 11839);
   auto *record = ::new (allocation)
-      EscalationNotificationStatusRecord(handler, context);
+      EscalationNotificationStatusRecord(unsigned_handler, context);
 
   addStatusRecordToSelf(record, [&](ActiveTaskStatus oldStatus, ActiveTaskStatus& newStatus) {
     return true;