[PATCH 2/2] Use ui_file_up in mi_interp

[Tom Tromey <tromey@adacore.com>]

This changes mi_interp to use ui_file_up rather than explicit
management.
---
 gdb/mi/mi-interp.c | 10 ++++------
 gdb/mi/mi-interp.h |  4 ++--
 2 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/gdb/mi/mi-interp.c b/gdb/mi/mi-interp.c
index 482166ea3a5..3cc2462f672 100644
--- a/gdb/mi/mi-interp.c
+++ b/gdb/mi/mi-interp.c
@@ -1276,7 +1276,7 @@ mi_interp::set_logging (ui_file_up logfile, bool logging_redirect,
       mi->saved_raw_stdout = mi->raw_stdout;
 
       ui_file *logfile_p = logfile.get ();
-      mi->saved_raw_file_to_delete = logfile.release ();
+      mi->logfile_holder = std::move (logfile);
 
       /* If something is not being redirected, then a tee containing both the
 	 logfile and stdout.  */
@@ -1284,19 +1284,17 @@ mi_interp::set_logging (ui_file_up logfile, bool logging_redirect,
       if (!logging_redirect || !debug_redirect)
 	{
 	  tee = new tee_file (mi->raw_stdout, logfile_p);
-	  mi->saved_tee_to_delete = tee;
+	  mi->stdout_holder.reset (tee);
 	}
 
       mi->raw_stdout = logging_redirect ? logfile_p : tee;
     }
   else
     {
-      delete mi->saved_raw_file_to_delete;
-      delete mi->saved_tee_to_delete;
+      mi->logfile_holder.reset ();
+      mi->stdout_holder.reset ();
       mi->raw_stdout = mi->saved_raw_stdout;
       mi->saved_raw_stdout = nullptr;
-      mi->saved_raw_file_to_delete = nullptr;
-      mi->saved_tee_to_delete = nullptr;
     }
 
   mi->out->set_raw (mi->raw_stdout);
diff --git a/gdb/mi/mi-interp.h b/gdb/mi/mi-interp.h
index d118ffb41e5..6b6e1f70220 100644
--- a/gdb/mi/mi-interp.h
+++ b/gdb/mi/mi-interp.h
@@ -56,8 +56,8 @@ class mi_interp final : public interp
      file which we need to delete, so we can restore correctly when
      done.  */
   struct ui_file *saved_raw_stdout;
-  struct ui_file *saved_raw_file_to_delete;
-  struct ui_file *saved_tee_to_delete;
+  ui_file_up logfile_holder;
+  ui_file_up stdout_holder;
 
   /* MI's builder.  */
   struct ui_out *mi_uiout;
-- 
2.34.3