Pass unique_ptr to add_thread_with_info

This changes add_thread_with_info to accept a unique_ptr, making it
clear that it takes ownership of the passed-in pointer.

I can't test the AIX or Darwin changes, but I think they are
relatively obvious.

5 files changed, 12 insertions, 7 deletions

diff --git a/gdb/aix-thread.c b/gdb/aix-thread.c
index 74cc67c..8c45116 100644
--- a/gdb/aix-thread.c
+++ b/gdb/aix-thread.c
@@ -899,7 +899,7 @@ sync_threadlists (pid_t pid)
 
 	  thread = add_thread_with_info (proc_target,
 					 ptid_t (pid, 0, pbuf[pi].pthid),
-					 priv);
+					 private_thread_info_up (priv));
 
 	  pi++;
 	}
diff --git a/gdb/darwin-nat.c b/gdb/darwin-nat.c
index 4cf2d9f..588e9e2 100644
--- a/gdb/darwin-nat.c
+++ b/gdb/darwin-nat.c
@@ -351,7 +351,8 @@ darwin_nat_target::check_new_threads (inferior *inf)
 	  pti->msg_state = DARWIN_RUNNING;
 
 	  /* Add the new thread.  */
-	  add_thread_with_info (this, ptid_t (inf->pid, 0, new_id), pti);
+	  add_thread_with_info (this, ptid_t (inf->pid, 0, new_id),
+				private_thread_info_up (pti));
 	  new_thread_vec.push_back (pti);
 	  new_ix++;
 	  continue;
diff --git a/gdb/gdbthread.h b/gdb/gdbthread.h
index d294be6..baff68a 100644
--- a/gdb/gdbthread.h
+++ b/gdb/gdbthread.h
@@ -222,6 +222,9 @@ struct private_thread_info
   virtual ~private_thread_info () = 0;
 };
 
+/* Unique pointer wrapper for private_thread_info.  */
+using private_thread_info_up = std::unique_ptr<private_thread_info>;
+
 /* Threads are intrusively refcounted objects.  Being the
    user-selected thread is normally considered an implicit strong
    reference and is thus not accounted in the refcount, unlike
@@ -522,7 +525,7 @@ public:
   struct frame_id initiating_frame = null_frame_id;
 
   /* Private data used by the target vector implementation.  */
-  std::unique_ptr<private_thread_info> priv;
+  private_thread_info_up priv;
 
   /* Branch trace information for this thread.  */
   struct btrace_thread_info btrace {};
@@ -616,7 +619,7 @@ extern struct thread_info *add_thread_silent (process_stratum_target *targ,
 /* Same as add_thread, and sets the private info.  */
 extern struct thread_info *add_thread_with_info (process_stratum_target *targ,
 						 ptid_t ptid,
-						 private_thread_info *);
+						 private_thread_info_up);
 
 /* Delete thread THREAD and notify of thread exit.  If the thread is
    currently not deletable, don't actually delete it but still tag it
diff --git a/gdb/linux-thread-db.c b/gdb/linux-thread-db.c
index 71a81aa..7d9fd57 100644
--- a/gdb/linux-thread-db.c
+++ b/gdb/linux-thread-db.c
@@ -1366,7 +1366,8 @@ record_thread (struct thread_db_info *info,
      thread with this PTID, but it's marked exited, then the kernel
      reused the tid of an old thread.  */
   if (tp == NULL || tp->state == THREAD_EXITED)
-    tp = add_thread_with_info (info->process_target, ptid, priv);
+    tp = add_thread_with_info (info->process_target, ptid,
+			       private_thread_info_up (priv));
   else
     tp->priv.reset (priv);
 
diff --git a/gdb/thread.c b/gdb/thread.c
index 7f7f035..63ed87e 100644
--- a/gdb/thread.c
+++ b/gdb/thread.c
@@ -306,11 +306,11 @@ add_thread_silent (process_stratum_target *targ, ptid_t ptid)
 
 struct thread_info *
 add_thread_with_info (process_stratum_target *targ, ptid_t ptid,
-		      private_thread_info *priv)
+		      private_thread_info_up priv)
 {
   thread_info *result = add_thread_silent (targ, ptid);
 
-  result->priv.reset (priv);
+  result->priv = std::move (priv);
 
   if (print_thread_events)
     gdb_printf (_("[New %s]\n"), target_pid_to_str (ptid).c_str ());