python: Use console format for output of gdb.execute command

When gdb is started in MI mode, the output of gdb.execute
command is in MI-format in case when it is executed from python stop
handler while for all other cases the output is in console-format.

To assure consistent output format, this is fixed by using the console
format for all python gdb command executions.

PR python/19743

gdb/ChangeLog:
2016-03-31  Catalin Udma  <catalin.udma@freescale.com>

	PR python/19743
	* python/python.c (execute_gdb_command): Use console uiout
	when executing gdb command.
	* utils.c (restore_ui_out_closure): New structure.
	(do_restore_ui_out): New function.
	(make_cleanup_restore_ui_out): Likewise.
	* utils.h (make_cleanup_restore_ui_out): Declare.

gdb/testsuite/ChangeLog:
2016-03-31  Catalin Udma  <catalin.udma@freescale.com>

	PR python/19743
	* gdb.python/py-mi-events-gdb.py: New file.
	* gdb.python/py-mi-events.c: New file.
	* gdb.python/py-mi-events.exp: New file.

Signed-off-by: Catalin Udma <catalin.udma@freescale.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/gdb/utils.c b/gdb/utils.c
index 97e5133..62e169a 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -345,6 +345,35 @@ make_cleanup_htab_delete (htab_t htab)
   return make_cleanup (do_htab_delete_cleanup, htab);
 }
 
+struct restore_ui_out_closure
+{
+  struct ui_out **variable;
+  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;