Re: [PATCH master+7.12 v2 1/3] Introduce cleanup to restore current_uiout

[Simon Marchi <simark@simark.ca>]

On 14/09/16 01:56 PM, Pedro Alves wrote:
> On 09/14/2016 06:45 PM, Simon Marchi wrote:
>> Make a globally available cleanup from a pre-existing one in infrun.c.
>> This is used in the following patch.
>>
>> gdb/ChangeLog:
>>
>> 	* infrun.c (restore_current_uiout_cleanup): Move to ui-out.c.
>> 	(print_stop_event): Use make_cleanup_restore_current_uiout.
>> 	* ui-out.c (restore_current_uiout_cleanup): Move from infrun.c.
>> 	(make_cleanup_restore_current_uiout): New function definition.
>> 	* ui-out.h (make_cleanup_restore_current_uiout): New function
>> 	definition.
> 
> OK.
> 
> Thanks,
> Pedro Alves

A little addition, I replace the usage of make_cleanup_restore_ui_out in python.c
by this new make_cleanup_restore_current_uiout, and remove
make_cleanupt_restore_ui_out.


From 21169da5b93b01a1c83174f79e6a377c7049974a Mon Sep 17 00:00:00 2001
From: Simon Marchi <simon.marchi@ericsson.com>
Date: Tue, 13 Sep 2016 16:44:05 -0400
Subject: [PATCH] Introduce cleanup to restore current_uiout

Make a globally available cleanup from a pre-existing one in infrun.c.
This is used in the following patch.

gdb/ChangeLog:

	* infrun.c (restore_current_uiout_cleanup): Move to ui-out.c.
	(print_stop_event): Use make_cleanup_restore_current_uiout.
	* python/python.c (execute_gdb_command): Likewise.
	* ui-out.c (restore_current_uiout_cleanup): Move from infrun.c.
	(make_cleanup_restore_current_uiout): New function definition.
	* ui-out.h (make_cleanup_restore_current_uiout): New function
	declaration.
	* utils.c (do_restore_ui_out): Remove.
	(make_cleanup_restore_ui_out): Remove.
	* utils.h (make_cleanup_restore_ui_out): Remove.
---
 gdb/infrun.c        | 12 +-----------
 gdb/python/python.c |  3 ++-
 gdb/ui-out.c        | 18 ++++++++++++++++++
 gdb/ui-out.h        |  4 ++++
 gdb/utils.c         | 23 -----------------------
 gdb/utils.h         |  3 ---
 6 files changed, 25 insertions(+), 38 deletions(-)

diff --git a/gdb/infrun.c b/gdb/infrun.c
index 70d7a09..ec37ca1 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -8096,16 +8096,6 @@ print_stop_location (struct target_waitstatus *ws)
     print_stack_frame (get_selected_frame (NULL), 0, source_flag, 1);
 }

-/* Cleanup that restores a previous current uiout.  */
-
-static void
-restore_current_uiout_cleanup (void *arg)
-{
-  struct ui_out *saved_uiout = (struct ui_out *) arg;
-
-  current_uiout = saved_uiout;
-}
-
 /* See infrun.h.  */

 void
@@ -8118,7 +8108,7 @@ print_stop_event (struct ui_out *uiout)

   get_last_target_status (&last_ptid, &last);

-  old_chain = make_cleanup (restore_current_uiout_cleanup, current_uiout);
+  old_chain = make_cleanup_restore_current_uiout ();
   current_uiout = uiout;

   print_stop_location (&last);
diff --git a/gdb/python/python.c b/gdb/python/python.c
index 621e201..b00b70b 100644
--- a/gdb/python/python.c
+++ b/gdb/python/python.c
@@ -654,7 +654,8 @@ execute_gdb_command (PyObject *self, PyObject *args, PyObject *kw)
       make_cleanup_restore_integer (&current_ui->async);
       current_ui->async = 0;

-      make_cleanup_restore_ui_out (&current_uiout);
+      make_cleanup_restore_current_uiout ();
+
       /* Use the console interpreter uiout to have the same print format
 	for console or MI.  */
       interp = interp_lookup (current_ui, "console");
diff --git a/gdb/ui-out.c b/gdb/ui-out.c
index 3972a56..ec44ab6 100644
--- a/gdb/ui-out.c
+++ b/gdb/ui-out.c
@@ -953,6 +953,24 @@ ui_out_destroy (struct ui_out *uiout)
   xfree (uiout);
 }

+/* Cleanup that restores a previous current uiout.  */
+
+static void
+restore_current_uiout_cleanup (void *arg)
+{
+  struct ui_out *saved_uiout = (struct ui_out *) arg;
+
+  current_uiout = saved_uiout;
+}
+
+/* See ui-out.h.  */
+
+struct cleanup *
+make_cleanup_restore_current_uiout (void)
+{
+  return make_cleanup (restore_current_uiout_cleanup, current_uiout);
+}
+
 /* Standard gdb initialization hook.  */

 void
diff --git a/gdb/ui-out.h b/gdb/ui-out.h
index 9e1e74d..6a4d78a 100644
--- a/gdb/ui-out.h
+++ b/gdb/ui-out.h
@@ -247,4 +247,8 @@ extern void ui_out_destroy (struct ui_out *uiout);

 extern int ui_out_redirect (struct ui_out *uiout, struct ui_file *outstream);

+/* Make a cleanup that restores the previous current uiout.  */
+
+extern struct cleanup *make_cleanup_restore_current_uiout (void);
+
 #endif /* UI_OUT_H */
diff --git a/gdb/utils.c b/gdb/utils.c
index 5188828..2afff80 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -338,29 +338,6 @@ struct restore_ui_out_closure
   struct ui_out *value;
 };

-static void
-do_restore_ui_out (void *p)
-{
-  struct restore_ui_out_closure *closure
-    = (struct restore_ui_out_closure *) p;
-
-  *(closure->variable) = closure->value;
-}
-
-/* Remember the current value of *VARIABLE and make it restored when
-   the cleanup is run.  */
-
-struct cleanup *
-make_cleanup_restore_ui_out (struct ui_out **variable)
-{
-  struct restore_ui_out_closure *c = XNEW (struct restore_ui_out_closure);
-
-  c->variable = variable;
-  c->value = *variable;
-
-  return make_cleanup_dtor (do_restore_ui_out, (void *) c, xfree);
-}
-
 struct restore_ui_file_closure
 {
   struct ui_file **variable;
diff --git a/gdb/utils.h b/gdb/utils.h
index 6080f5b..bf77d7d 100644
--- a/gdb/utils.h
+++ b/gdb/utils.h
@@ -93,9 +93,6 @@ extern struct cleanup *make_cleanup_restore_uinteger (unsigned int *variable);
 struct target_ops;
 extern struct cleanup *make_cleanup_unpush_target (struct target_ops *ops);

-
-extern struct cleanup *
-  make_cleanup_restore_ui_out (struct ui_out **variable);
 extern struct cleanup *
   make_cleanup_restore_ui_file (struct ui_file **variable);

-- 
2.9.3