Implement gdb.execute_mi

This adds a new Python function, gdb.execute_mi, that can be used to
invoke an MI command but get the output as a Python object, rather
than a string.  This is done by implementing a new ui_out subclass
that builds a Python object.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=11688
Reviewed-By: Eli Zaretskii <eliz@gnu.org>

2 files changed, 20 insertions, 0 deletions

diff --git a/gdb/mi/mi-cmds.h b/gdb/mi/mi-cmds.h
index d867c298df9..c62b134fe3d 100644
--- a/gdb/mi/mi-cmds.h
+++ b/gdb/mi/mi-cmds.h
@@ -206,6 +206,11 @@ extern mi_command *mi_cmd_lookup (const char *command);
 
 extern void mi_execute_command (const char *cmd, int from_tty);
 
+/* Execute an MI command given an already-constructed parse
+   object.  */
+
+extern void mi_execute_command (mi_parse *context);
+
 /* Insert COMMAND into the global mi_cmd_table.  Return false if
    COMMAND->name already exists in mi_cmd_table, in which case COMMAND will
    not have been added to mi_cmd_table.  Otherwise, return true, and
diff --git a/gdb/mi/mi-main.c b/gdb/mi/mi-main.c
index b430115daea..f3b7490e089 100644
--- a/gdb/mi/mi-main.c
+++ b/gdb/mi/mi-main.c
@@ -1965,6 +1965,21 @@ mi_execute_command (const char *cmd, int from_tty)
     }
 }
 
+/* See mi-cmds.h.  */
+
+void
+mi_execute_command (mi_parse *context)
+{
+  if (context->op != MI_COMMAND)
+    error (_("Command is not an MI command"));
+
+  scoped_restore save_token = make_scoped_restore (&current_token,
+						   context->token);
+  scoped_restore save_debug = make_scoped_restore (&mi_debug_p, 0);
+
+  mi_cmd_execute (context);
+}
+
 /* Captures the current user selected context state, that is the current
    thread and frame.  Later we can then check if the user selected context
    has changed at all.  */