Re: Emacs daemon dies at Xorg crash

[Ulrich Mueller <ulm@gentoo.org>]

>>>>> On Wed, 17 Dec 2008, Dan Nicolaescu wrote:

> It works fine for me on a Fedora 10 machine when configuring with
> --with-x-toolkit=athena. Killing X does not kill the daemon when
> either no frames are open, tty frames are open, X11 frames or tty
> and X11 frames are open.

I also depends on the desktop / window manager. Here it dies when
Gnome or Xfce4 are terminated (only in the "no frames" case).
No problem with IceWM though.


Below I include a gdb backtrace. I can provide further information if
necessary.

cmd_error_internal in frame #25 is called with the first argument:
(error "Connection lost to X server `:0.0'")
Since FRAME_INITIAL_P (sf) is true at that point, it then calls
kill-emacs:

  /* If the window system or terminal frame hasn't been initialized
     yet, or we're not interactive, write the message to stderr and exit.  */
  else if (!sf->glyphs_initialized_p
	   || FRAME_INITIAL_P (sf)
	   || noninteractive)
    {
      print_error_message (data, Qexternal_debugging_output,
			   context, Vsignaling_function);
      Fterpri (Qexternal_debugging_output);
      Fkill_emacs (make_number (-1));
    }


#0  Fsignal (error_symbol=0x84863b9, data=0x874fcfd) at eval.c:1640
#1  0x0824c780 in xsignal (error_symbol=0x84863b9, data=0x874fcfd) at eval.c:1772
#2  0x081f8844 in report_file_error (string=0x82e8afa "make client process failed", data=0x874fd45) at fileio.c:277
#3  0x0829a4bd in Fmake_network_process (nargs=0xa, args=0x7fdb5f58) at process.c:3632
#4  0x0824e5b7 in Ffuncall (nargs=0xb, args=0x7fdb5f54) at eval.c:3050
#5  0x0829201e in Fbyte_code (bytestr=0x84c8f5b, vector=0x9b5bea4, maxdepth=0x70) at bytecode.c:678
#6  0x0824d885 in Feval (form=0x8731c55) at eval.c:2406
#7  0x0824be4b in internal_lisp_condition_case (var=0x84778c9, bodyform=0x8731c55, handlers=0x8731f9d) at eval.c:1456
#8  0x08292cf0 in Fbyte_code (bytestr=0x84c8fdb, vector=0x9b5bf44, maxdepth=0x18) at bytecode.c:868
#9  0x0824ee8a in funcall_lambda (fun=0x9b5bfcc, nargs=0x1, arg_vector=0x7fdb66b4) at eval.c:3256
#10 0x0824e93b in Ffuncall (nargs=0x2, args=0x7fdb66b0) at eval.c:3115
#11 0x0829201e in Fbyte_code (bytestr=0x84f7f63, vector=0x9b5baa4, maxdepth=0xb8) at bytecode.c:678
#12 0x0824ee8a in funcall_lambda (fun=0x9b5bc9c, nargs=0x1, arg_vector=0x7fdb6a04) at eval.c:3256
#13 0x0824e93b in Ffuncall (nargs=0x2, args=0x7fdb6a00) at eval.c:3115
#14 0x0829201e in Fbyte_code (bytestr=0x84cd9f3, vector=0x9b5c034, maxdepth=0x18) at bytecode.c:678
#15 0x0824ee8a in funcall_lambda (fun=0x9b5c104, nargs=0x1, arg_vector=0x7fdb6d04) at eval.c:3256
#16 0x0824e93b in Ffuncall (nargs=0x2, args=0x7fdb6d00) at eval.c:3115
#17 0x0829201e in Fbyte_code (bytestr=0x84f6b03, vector=0x9b5b9b4, maxdepth=0x10) at bytecode.c:678
#18 0x0824ee8a in funcall_lambda (fun=0x9b5ba2c, nargs=0x0, arg_vector=0x7fdb7078) at eval.c:3256
#19 0x0824e93b in Ffuncall (nargs=0x1, args=0x7fdb7074) at eval.c:3115
#20 0x0824e0a0 in run_hook_with_args (nargs=0x1, args=0x7fdb7074, cond=to_completion) at eval.c:2728
#21 0x0824debd in Frun_hooks (nargs=0x1, args=0x7fdb7134) at eval.c:2591
#22 0x0824e5b7 in Ffuncall (nargs=0x2, args=0x7fdb7130) at eval.c:3050
#23 0x0824e280 in call1 (fn=0x8499a61, arg1=0x84a5729) at eval.c:2854
#24 0x081c1a14 in Fkill_emacs (arg=0xfffffff8) at emacs.c:2087
#25 0x081c3219 in cmd_error_internal (data=0x874fe4d, context=0x7fdb71ae "") at keyboard.c:1274
#26 0x081c30b4 in cmd_error (data=0x874fe4d) at keyboard.c:1222
#27 0x0824bf18 in internal_condition_case (bfun=0x81c35ee <command_loop_1>, handlers=0x84821b1, hfun=0x81c2fc9 <cmd_error>) at eval.c:1501
#28 0x081c3340 in command_loop_2 () at keyboard.c:1338
#29 0x0824ba31 in internal_catch (tag=0x84811f9, func=0x81c331b <command_loop_2>, arg=0x84778c9) at eval.c:1247
#30 0x081c32f9 in command_loop () at keyboard.c:1317
#31 0x081c2bd9 in recursive_edit_1 () at keyboard.c:942
#32 0x081c2d46 in Frecursive_edit () at keyboard.c:1004
#33 0x081c14c6 in main (argc=0x3, argv=0x7fdb78b4) at emacs.c:1788

Lisp Backtrace:
"make-network-process" (0x7fdb5f58)
"byte-code" (0x7fdb6200)
"server-running-p" (0x7fdb66b4)
"server-start" (0x7fdb6a04)
"server-mode" (0x7fdb6d04)
0x9b5ba2c PVEC_COMPILED
"run-hooks" (0x7fdb7134)

Ulrich