Free results of varobj_get_expression

varobj_get_expression returns an allocated string, which must be freed
by the caller.

gdb/ChangeLog:

	* mi-cmd-var.c (print_varobj): Free varobj_get_expression
	result.
	(mi_cmd_var_info_expression): Same.
	* varobj.c (varobj_get_expression): Mention in the comment that
	the result must by freed by the caller.

1 files changed, 11 insertions, 2 deletions

diff --git a/gdb/mi/mi-cmd-var.c b/gdb/mi/mi-cmd-var.c
index d873a17..d9b37f8 100644
--- a/gdb/mi/mi-cmd-var.c
+++ b/gdb/mi/mi-cmd-var.c
@@ -55,7 +55,12 @@ print_varobj (struct varobj *var, enum print_values print_values,
 
   ui_out_field_string (uiout, "name", varobj_get_objname (var));
   if (print_expression)
-    ui_out_field_string (uiout, "exp", varobj_get_expression (var));
+    {
+      char *exp = varobj_get_expression (var);
+
+      ui_out_field_string (uiout, "exp", exp);
+      xfree (exp);
+    }
   ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
   
   if (mi_print_value_p (var, print_values))
@@ -485,6 +490,7 @@ mi_cmd_var_info_expression (char *command, char **argv, int argc)
   struct ui_out *uiout = current_uiout;
   const struct language_defn *lang;
   struct varobj *var;
+  char *exp;
 
   if (argc != 1)
     error (_("-var-info-expression: Usage: NAME."));
@@ -495,7 +501,10 @@ mi_cmd_var_info_expression (char *command, char **argv, int argc)
   lang = varobj_get_language (var);
 
   ui_out_field_string (uiout, "lang", lang->la_natural_name);
-  ui_out_field_string (uiout, "exp", varobj_get_expression (var));
+
+  exp = varobj_get_expression (var);
+  ui_out_field_string (uiout, "exp", exp);
+  xfree (exp);
 }
 
 void