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Re: [PATCH] Step over Objective-C dispatch function
- From: Michael Snyder <msnyder at redhat dot com>
- To: Adam Fedor <fedor at doc dot com>
- Cc: GDB Patches <gdb-patches at sources dot redhat dot com>
- Date: Thu, 30 Jan 2003 18:52:35 -0800
- Subject: Re: [PATCH] Step over Objective-C dispatch function
- Organization: Red Hat, Inc.
- References: <3E1504FF.2070506@doc.com>
Adam Fedor wrote:
>
> All Objective-C messages are called through the standard dispatch
> function. This patch steps right into the method without the user having
> to go through the dispatch function manually.
Adam, can you explain / comment what you're doing a little more?
I *think* what you're doing is trying to follow thru the dispatcher
to the actual method -- but the only reason I can even guess that
is because I've worked on debugging objective-c.
>
> -------------------------------------------------------------------------------
> 2003-01-02 Adam Fedor <fedor@gnu.org>
>
> * infrun.c (handle_inferior_event): Add test to step over
> Objective-C dispatch function.
> * Makefile.in (infrun.o): Add $(objc_lang_h)
>
> Index: Makefile.in
> ===================================================================
> RCS file: /cvs/src/src/gdb/Makefile.in,v
> retrieving revision 1.302
> diff -u -p -r1.302 Makefile.in
> --- Makefile.in 2 Jan 2003 20:29:15 -0000 1.302
> +++ Makefile.in 3 Jan 2003 03:24:54 -0000
> @@ -1795,7 +1796,8 @@ infptrace.o: infptrace.c $(defs_h) $(fra
> infrun.o: infrun.c $(defs_h) $(gdb_string_h) $(symtab_h) $(frame_h) \
> $(inferior_h) $(breakpoint_h) $(gdb_wait_h) $(gdbcore_h) $(gdbcmd_h) \
> $(cli_script_h) $(target_h) $(gdbthread_h) $(annotate_h) \
> - $(symfile_h) $(top_h) $(inf_loop_h) $(regcache_h) $(value_h)
> + $(symfile_h) $(top_h) $(inf_loop_h) $(regcache_h) $(value_h) \
> + $(objc_lang_h)
> inftarg.o: inftarg.c $(defs_h) $(frame_h) $(inferior_h) $(target_h) \
> $(gdbcore_h) $(command_h) $(gdb_stat_h) $(gdb_wait_h)
> infttrace.o: infttrace.c $(defs_h) $(frame_h) $(inferior_h) $(target_h) \
> Index: infrun.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/infrun.c,v
> retrieving revision 1.92
> diff -u -p -r1.92 infrun.c
> --- infrun.c 18 Dec 2002 18:03:42 -0000 1.92
> +++ infrun.c 3 Jan 2003 03:20:06 -0000
> @@ -42,6 +42,7 @@
> #include "inf-loop.h"
> #include "regcache.h"
> #include "value.h"
> +#include "objc-lang.h"
>
> /* Prototypes for local functions */
>
> @@ -1173,6 +1174,7 @@ void
> handle_inferior_event (struct execution_control_state *ecs)
> {
> CORE_ADDR tmp;
> + CORE_ADDR new_stop;
> int stepped_after_stopped_by_watchpoint;
> int sw_single_step_trap_p = 0;
>
> @@ -2428,6 +2430,22 @@ process_event_stop_test:
> keep_going (ecs);
> return;
> }
> + }
> +
> + /* Step over Objective-C dispatch function. */
> + if (tmp)
> + find_objc_msgcall (tmp, &new_stop);
> + else
> + find_objc_msgcall (stop_pc, &new_stop);
> +
> + if (new_stop) /* step into a method call */
> + ecs->stop_func_start = new_stop;
> +
> + if (new_stop)
> + {
> + tmp = SKIP_TRAMPOLINE_CODE (new_stop);
> + if (tmp != 0)
> + ecs->stop_func_start = tmp;
> }
>
> /* If we have line number information for the function we