Strict memory safety cleanups for the concurrency library

Author: DougGregor

stdlib/public/Concurrency/Task.swift

@@ -1576,8 +1576,8 @@ internal func _getCurrentTaskName() -> UnsafePointer<UInt8>?
 
 @available(SwiftStdlib 6.2, *)
 internal func _getCurrentTaskNameString() -> String? {
-  if let stringPtr = _getCurrentTaskName() {
-    String(cString: stringPtr)
+  if let stringPtr = unsafe _getCurrentTaskName() {
+    unsafe String(cString: stringPtr)
   } else {
     nil
   }

stdlib/public/Concurrency/TaskGroup+Embedded.swift

@@ -37,7 +37,7 @@ extension TaskGroup {
     )
 
     let builtinSerialExecutor =
-      Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
+      unsafe Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
 
     _ = Builtin.createTask(
       flags: flags,
@@ -70,7 +70,7 @@ extension TaskGroup {
     )
 
     let builtinSerialExecutor =
-      Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
+      unsafe Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
 
     _ = Builtin.createTask(
       flags: flags,
@@ -103,7 +103,7 @@ extension ThrowingTaskGroup {
     )
 
     let builtinSerialExecutor =
-      Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
+      unsafe Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
 
     _ = Builtin.createTask(
       flags: flags,
@@ -136,7 +136,7 @@ extension ThrowingTaskGroup {
     )
 
     let builtinSerialExecutor =
-      Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
+      unsafe Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
 
     _ = Builtin.createTask(
       flags: flags,
@@ -169,7 +169,7 @@ extension DiscardingTaskGroup {
     )
 
     let builtinSerialExecutor =
-      Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
+      unsafe Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
 
     _ = Builtin.createTask(
       flags: flags,
@@ -202,7 +202,7 @@ extension DiscardingTaskGroup {
     )
 
     let builtinSerialExecutor =
-      Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
+      unsafe Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
 
     _ = Builtin.createTask(
       flags: flags,
@@ -235,7 +235,7 @@ extension ThrowingDiscardingTaskGroup {
     )
 
     let builtinSerialExecutor =
-      Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
+      unsafe Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
 
     _ = Builtin.createTask(
       flags: flags,
@@ -268,7 +268,7 @@ extension ThrowingDiscardingTaskGroup {
     )
 
     let builtinSerialExecutor =
-      Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
+      unsafe Builtin.extractFunctionIsolation(operation)?.unownedExecutor.executor
 
     _ = Builtin.createTask(
       flags: flags,