[patch] memleak in catch catch

[Aleksandar Ristovski <aristovski at qnx dot com>]

Hello,

A trivial patch to fix memory leak in handle_gnu_v3_exceptions... this is probably going to change soon to allow setting catchpoints before program starts, but still.

Thanks,

Aleksandar Ristovski
QNX Software Systems


ChangeLog:
	* breakpoint.c (struct decode_line_args): New structure for passing
	arguments to decode_line_1.
	(call_decode_line_1): New function.
	(handle_gnu_v3_exceptions): Call decode_line_1 via catch_exception and
	the new call_decode_line_1 function. Free allocated string on failure.

Index: gdb/breakpoint.c
===================================================================
RCS file: /cvs/src/src/gdb/breakpoint.c,v
retrieving revision 1.316
diff -u -p -r1.316 breakpoint.c
--- gdb/breakpoint.c	26 Apr 2008 05:43:45 -0000	1.316
+++ gdb/breakpoint.c	29 Apr 2008 18:20:24 -0000
@@ -6561,6 +6561,19 @@ static struct breakpoint_ops gnu_v3_exce
   print_mention_exception_catchpoint
 };
 
+struct decode_line_args
+{
+  char **argptr;
+  struct symtabs_and_lines *sals;
+};
+
+static void
+call_decode_line_1 (struct ui_out *ui_out, void *arg)
+{
+  struct decode_line_args *dlargs = arg;
+  *dlargs->sals = decode_line_1 (dlargs->argptr, 1, NULL, 0, NULL, NULL);
+}
+
 static int
 handle_gnu_v3_exceptions (int tempflag, char *cond_string,
 			  enum exception_event_kind ex_event, int from_tty)
@@ -6568,18 +6581,23 @@ handle_gnu_v3_exceptions (int tempflag, 
   char *trigger_func_name, *nameptr;
   struct symtabs_and_lines sals;
   struct breakpoint *b;
+  struct decode_line_args dlargs = { &nameptr, &sals };
+  struct gdb_exception e;
 
+  sals.nelts = 0;
+ 
   if (ex_event == EX_EVENT_CATCH)
     trigger_func_name = xstrdup ("__cxa_begin_catch");
   else
     trigger_func_name = xstrdup ("__cxa_throw");
 
   nameptr = trigger_func_name;
-  sals = decode_line_1 (&nameptr, 1, NULL, 0, NULL, NULL);
+  e = catch_exception (uiout, call_decode_line_1, 
+		       &dlargs, RETURN_MASK_ERROR);
   if (sals.nelts == 0)
     {
       xfree (trigger_func_name);
-      return 0;
+      throw_exception (e);
     }
 
   b = set_raw_breakpoint (sals.sals[0], bp_breakpoint);