aboutsummaryrefslogblamecommitdiffstats
path: root/lib/debugger/src/dbg_wx_mon.erl
blob: 3ffdeeaea2ce43d0805a1311fef09090f4d23152 (plain) (tree)
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759

















































































































































                                                                                     
                                      



































































































































































































































































































































































































































































































































































































































                                                                                           
%%
%% %CopyrightBegin%
%% 
%% Copyright Ericsson AB 2008-2009. All Rights Reserved.
%% 
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%% 
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%% 
%% %CopyrightEnd%
%%

%%
-module(dbg_wx_mon).

-include_lib("kernel/include/file.hrl").
-include_lib("wx/include/wx.hrl").

%% External exports
-export([start/2, stop/0]).

-define(TRACEWIN, ['Search Area', 'Button Area', 'Evaluator Area', 'Bindings Area']).
-define(BACKTRACE, 100).

-record(pinfo, {pid,       % pid()
		status     % break | exit | idle | running | waiting
	       }).

-record(state, {mode,      % local | global
		starter,   % bool() 'true' if int was started by me

		win,       % term() Monitor window data
		focus,     % undefined | #pinfo{} Process in focus
		coords,    % {X,Y} Mouse pointer position

		intdir,    % string() Default dir
		pinfos,    % [#pinfo{}] Debugged processes

		tracewin,  % [Area] Areas shown in trace window
		backtrace, % integer() Number of call frames to fetch

		attach,    % false | {Flags, Function}

		sfile,     % default | string() Settings file
		changed    % boolean() Settings have been changed
	       }). 

%%====================================================================
%% External exports
%%====================================================================

%%--------------------------------------------------------------------
%% start(Mode, SFile) -> {ok, Pid} | {error, Reason}
%%   Mode = local | global
%%   SFile = string() | default  Settings file
%%   Pid = pid()
%%   Reason = {already_started,Pid} | term()
%%--------------------------------------------------------------------
start(Mode, SFile) ->
    case whereis(?MODULE) of
	undefined ->
	    CallingPid = self(),
	    Pid = spawn(fun () -> init(CallingPid, Mode, SFile) end),
	    receive
		{initialization_complete, Pid} ->
		    {ok, Pid};
		Error ->
		    Error
	    end;

	Pid ->
            {error, {already_started,Pid}}
    end.

%%--------------------------------------------------------------------
%% stop() -> ok
%%--------------------------------------------------------------------
stop() ->
    case whereis(?MODULE) of
	undefined ->
	    ok;
	Pid ->
	    Flag = process_flag(trap_exit, true),
	    link(Pid),
	    Pid ! stop,
	    receive
		{'EXIT', Pid, stop} ->
		    process_flag(trap_exit, Flag),
		    ok
	    end
    end.


%%====================================================================
%% Initialization
%%====================================================================

init(CallingPid, Mode, SFile) ->
    register(?MODULE, self()),

    %% Graphics system
    case catch dbg_wx_mon_win:init() of
	{'EXIT', Reason} ->
	    CallingPid ! {error, Reason};
	GS ->
	    try 
		init2(CallingPid, Mode, SFile, GS)
	    catch 
		exit:stop -> stop;
		Error:Reason ->
		    io:format("~p: Crashed {~p,~p} in~n  ~p",
			      [?MODULE, Error, Reason, erlang:get_stacktrace()])
	    end
    end.

init2(CallingPid, Mode, SFile, GS) ->
    %% Start Int if necessary and subscribe to information from it
    Bool = case int:start() of
	       {ok, _Int} -> true;
	       {error, {already_started, _Int}} -> false
	   end,
    int:subscribe(),

    %% Start other necessary stuff
    dbg_wx_win:init(),     
    dbg_wx_winman:start(), % Debugger window manager

    %% Create monitor window
    Title = "Monitor",
    Win = dbg_wx_mon_win:create_win(GS, Title, menus()),
    Window = dbg_wx_mon_win:get_window(Win),
    dbg_wx_winman:insert(Title, Window),

    %% Initial process state
    State1 = #state{mode    = Mode,
		    starter = Bool,

		    win     = Win,
		    focus   = undefined,
		    coords  = {20,20},

		    intdir  = element(2, file:get_cwd()),
		    pinfos  = [],

		    sfile   = SFile,
		    changed = false
		   },

    State2 = init_options(?TRACEWIN,            % Trace Window
			  int:auto_attach(),    % Auto Attach
			  int:stack_trace(),    % Stack Trace
			  ?BACKTRACE,           % Back Trace Size
			  State1),

    State3 = init_contents(int:interpreted(),   % Modules
			   int:all_breaks(),    % Breakpoints
			   int:snapshot(),      % Processes
			   State2),

    %% Disable/enable functionality according to process in focus (none)
    gui_enable_functions(State3#state.focus),

    CallingPid ! {initialization_complete, self()},

    if
	SFile==default ->
	    loop(State3);
	true ->
	    loop(load_settings(SFile, State3))
    end.

init_options(TraceWin, AutoAttach, StackTrace, BackTrace, State) ->
    lists:foreach(fun(Area) ->
			  dbg_wx_mon_win:select(Area, true)
		  end,
		  TraceWin),

    case AutoAttach of
	false -> ignore;
	{Flags, _Function} ->
	    dbg_wx_mon_win:show_option(State#state.win,
				       auto_attach, Flags),
	    lists:foreach(fun(Flag) ->
				  dbg_wx_mon_win:select(map(Flag), true)
			  end,
			  Flags)
    end,

    dbg_wx_mon_win:show_option(State#state.win,
			       stack_trace, StackTrace),
    dbg_wx_mon_win:select(map(StackTrace), true),

    dbg_wx_mon_win:show_option(State#state.win, back_trace, BackTrace),

    State#state{tracewin=TraceWin, backtrace=BackTrace}.

init_contents(Mods, Breaks, Processes, State) ->
    Win2 =
        lists:foldl(fun(Mod, Win) ->
			    dbg_wx_mon_win:add_module(Win,'Module',Mod)
		    end,
		    State#state.win,
		    Mods),

    Win3 = 
        lists:foldl(fun(Break, Win) ->
			    dbg_wx_mon_win:add_break(Win,'Break',Break)
		    end,
		    Win2,
		    Breaks),

    lists:foldl(fun(PidTuple, State0) ->
			int_cmd({new_process, PidTuple}, State0)
		end,
		State#state{win=Win3},
		Processes).


%%====================================================================
%% Main loop and message handling
%%====================================================================

loop(State) ->
    receive
	stop ->
	    gui_cmd(stopped, State);
	
	%% From the wx-GUI
	#wx{} = GuiEvent ->
	    Cmd = dbg_wx_mon_win:handle_event(GuiEvent,State#state.win),
	    State2 = gui_cmd(Cmd, State),
	    loop(State2);

	%% From the interpreter process
	{int, Cmd} ->
	    State2 = int_cmd(Cmd, State),
	    loop(State2);

	%% From the dbg_ui_interpret process
	{dbg_ui_interpret, Dir} ->
	    loop(State#state{intdir=Dir});
	
	%% From the dbg_wx_winman process (Debugger window manager)
	{dbg_ui_winman, update_windows_menu, Data} ->
	    Window = dbg_wx_mon_win:get_window(State#state.win),
	    dbg_wx_winman:update_windows_menu(Window,Data),
	    loop(State);

	%% From the trace window
	{dbg_wx_trace, From, get_env} -> 
	    From ! {env, self(), wx:get_env(), dbg_wx_mon_win:get_window(State#state.win)},
	    loop(State)
    end.

%%--Commands from the GUI---------------------------------------------
%% Act upon a command from the GUI. In most cases, it is only necessary
%% to call a relevant int-function. int will then report when the action
%% has been taken.

gui_cmd(ignore, State) ->
    State;
gui_cmd(stopped, State) ->
    if
	State#state.starter==true -> int:stop();
	true -> int:auto_attach(false)
    end,
    exit(stop);
gui_cmd({coords, Coords}, State) ->
    State#state{coords=Coords};

gui_cmd({shortcut, Key}, State) ->
    case shortcut(Key) of
	{always, Cmd} -> gui_cmd(Cmd, State);
	{if_enabled, Cmd} ->
	    case dbg_wx_mon_win:is_enabled(Cmd) of
		true -> gui_cmd(Cmd, State);
		false -> State
	    end;
	false -> State
    end;

%% File Menu
gui_cmd('Load Settings...', State) ->
    Window = dbg_wx_mon_win:get_window(State#state.win),
    case dbg_wx_settings:load(Window, State#state.coords,State#state.sfile) of
	cancel ->     State;
	{ok, File} -> load_settings(File,State)
    end;
gui_cmd('Save Settings...', State) ->
    Window = dbg_wx_mon_win:get_window(State#state.win),
    case dbg_wx_settings:save(Window, State#state.coords,State#state.sfile) of
	cancel ->     State;
	{ok, File} -> save_settings(File,State)
    end;
gui_cmd('Exit', State) ->
    gui_cmd(stopped, State);

%% Edit Menu
gui_cmd('Refresh', State) ->
    int:clear(),
    Win = dbg_wx_mon_win:clear_processes(State#state.win),
    gui_enable_functions(undefined),
    State2 = State#state{win=Win, focus=undefined, pinfos=[]},
    lists:foldl(fun(PidTuple, S) ->
			int_cmd({new_process,PidTuple}, S)
		end,
		State2,
		int:snapshot());
gui_cmd('Kill All', State) ->
    lists:foreach(fun(PInfo) ->
			  case PInfo#pinfo.status of
			      exit -> ignore;
			      _Status -> exit(PInfo#pinfo.pid, kill)
			  end
		  end,
		  State#state.pinfos),
    State;

%% Module Menu
gui_cmd('Interpret...', State) ->
    Window = dbg_wx_mon_win:get_window(State#state.win),
    dbg_wx_interpret:start(Window, State#state.coords,
 			   State#state.intdir, State#state.mode),
    State;
gui_cmd('Delete All Modules', State) ->
    lists:foreach(fun(Mod) -> int:nn(Mod) end, int:interpreted()),
    State;
gui_cmd({module, Mod, What}, State) ->
    case What of
	delete -> int:nn(Mod);
	view -> 
	    Window = dbg_wx_mon_win:get_window(State#state.win),
	    dbg_wx_view:start(Window, Mod)
    end,
    State;

%% Process Menu
gui_cmd('Step', State) ->
    int:step((State#state.focus)#pinfo.pid),
    State;
gui_cmd('Next', State) ->
    int:next((State#state.focus)#pinfo.pid),
    State;
gui_cmd('Continue', State) ->
    int:continue((State#state.focus)#pinfo.pid),
    State;
gui_cmd('Finish ', State) ->
    int:finish((State#state.focus)#pinfo.pid),
    State;
gui_cmd('Attach', State) ->
    Pid = (State#state.focus)#pinfo.pid,
    case dbg_wx_winman:is_started(dbg_wx_trace:title(Pid)) of
	true -> ignore;
	false -> int:attach(Pid, trace_function(State))
    end,
    State;
gui_cmd('Kill', State) ->
    exit((State#state.focus)#pinfo.pid, kill),
    State;

%% Break Menu
gui_cmd('Line Break...', State) ->
    Window = dbg_wx_mon_win:get_window(State#state.win),
    dbg_wx_break:start(Window, State#state.coords, line),
    State;
gui_cmd('Conditional Break...', State) ->
    Window = dbg_wx_mon_win:get_window(State#state.win),
    dbg_wx_break:start(Window, State#state.coords, conditional),
    State;
gui_cmd('Function Break...', State) ->
    Window = dbg_wx_mon_win:get_window(State#state.win),
    dbg_wx_break:start(Window, State#state.coords, function),
    State;
gui_cmd('Enable All', State) ->
    Breaks = int:all_breaks(),
    lists:foreach(fun ({{Mod, Line}, _Options}) ->
			  int:enable_break(Mod, Line)
		  end,
		  Breaks),
    State;
gui_cmd('Disable All', State) ->
    Breaks = int:all_breaks(),
    lists:foreach(fun ({{Mod, Line}, _Options}) ->
			  int:disable_break(Mod, Line)
		  end,
		  Breaks),
    State;
gui_cmd('Delete All', State) ->
    int:no_break(),
    State;
gui_cmd({break, {Mod, Line}, What}, State) ->
    case What of
	delete -> int:delete_break(Mod, Line);
	{status, inactive} -> int:disable_break(Mod, Line);
	{status, active} -> int:enable_break(Mod, Line);
	{trigger, Action} -> int:action_at_break(Mod, Line, Action)
    end,
    State;

%% Options Commands
gui_cmd({'Trace Window', TraceWin}, State) ->
    State2 = State#state{tracewin=TraceWin},
    case State#state.attach of
	false -> ignore;
	{Flags, {dbg_ui_trace, start, StartFlags}} ->
	    case trace_function(State2) of
		{_, _, StartFlags} -> ignore;
		NewFunction -> % {_, _, NewStartFlags}
		    int:auto_attach(Flags, NewFunction)
	    end;
	_AutoAttach -> ignore
    end,
    State2;
gui_cmd({'Auto Attach', When}, State) ->
    if
	When==[] -> int:auto_attach(false);
	true ->
	    Flags = lists:map(fun(Name) -> map(Name) end, When),
	    int:auto_attach(Flags, trace_function(State))
    end,
    State;
gui_cmd({'Stack Trace', [Name]}, State) ->
    int:stack_trace(map(Name)),
    State;
gui_cmd('Back Trace Size...', State) ->
    Window = dbg_wx_mon_win:get_window(State#state.win),
    What = {integer, State#state.backtrace},
    case dbg_wx_win:entry(Window, "Backtrace", 'Backtrace:', What) of
	cancel -> 
	    State;
	{_,BackTrace} ->
	    dbg_wx_mon_win:show_option(State#state.win,back_trace, BackTrace),
	    State#state{backtrace=BackTrace}
    end;

%% Help Menu
gui_cmd('Debugger', State) ->
    HelpFile = filename:join([code:lib_dir(debugger),
			      "doc", "html", "part_frame.html"]),
    Window = dbg_wx_mon_win:get_window(State#state.win),
    dbg_wx_win:open_help(Window, HelpFile),
    State;

gui_cmd({focus, Pid, Win}, State) ->
    {value, PInfo} =
	lists:keysearch(Pid, #pinfo.pid, State#state.pinfos),
    gui_enable_functions(PInfo),
    State#state{win=Win, focus=PInfo};
gui_cmd(default, State) ->
    case lists:member('Attach', menus(enabled, State#state.focus)) of
	true -> gui_cmd('Attach', State);
	false -> State
    end.

%%--Commands from the interpreter-------------------------------------

int_cmd({interpret, Mod}, State) ->
    Win = dbg_wx_mon_win:add_module(State#state.win, 'Module', Mod),
    State#state{win=Win};
int_cmd({no_interpret, Mod}, State) ->
    Win = dbg_wx_mon_win:delete_module(State#state.win, Mod),
    State#state{win=Win};

int_cmd({new_process, {Pid, Function, Status, Info}}, State) ->

    %% Create record with information about the process
    Name = registered_name(Pid),
    PInfo = #pinfo{pid=Pid, status=Status},

    %% Update window
    Win = dbg_wx_mon_win:add_process(State#state.win,
				     Pid, Name, Function, Status, Info),

    %% Store process information
    PInfos = State#state.pinfos ++ [PInfo],
    State#state{win=Win, pinfos=PInfos};
int_cmd({new_status, Pid, Status, Info}, State) ->

    %% Find stored information about the process
    PInfos = State#state.pinfos,
    {value, PInfo} = lists:keysearch(Pid, #pinfo.pid, PInfos),

    %% Update process information
    PInfo2 = PInfo#pinfo{status=Status},
    PInfos2 = lists:keyreplace(Pid, #pinfo.pid, PInfos, PInfo2),
    State2 = State#state{pinfos=PInfos2},

    %% Update window
    dbg_wx_mon_win:update_process(State2#state.win, Pid, Status, Info),
    case State2#state.focus of
	#pinfo{pid=Pid} ->
	    gui_enable_functions(PInfo2),
	    State2#state{focus=PInfo2};
	_ ->
	    State2
    end;

int_cmd({new_break, Break}, State) ->
    Win = dbg_wx_mon_win:add_break(State#state.win, 'Break', Break),
    State#state{win=Win};
int_cmd({delete_break, Point}, State) ->
    Win = dbg_wx_mon_win:delete_break(State#state.win, Point),
    State#state{win=Win};
int_cmd({break_options, Break}, State) ->
    dbg_wx_mon_win:update_break(State#state.win, Break),
    State;
int_cmd(no_break, State) ->
    Win = dbg_wx_mon_win:clear_breaks(State#state.win),
    State#state{win=Win};
int_cmd({no_break, Mod}, State) ->
    Win = dbg_wx_mon_win:clear_breaks(State#state.win, Mod),
    State#state{win=Win};

int_cmd({auto_attach, AutoAttach}, State) ->
    OnFlags = case AutoAttach of
		  false -> [];
		  {Flags, _Function} -> Flags
	      end,
    OffFlags = [init, exit, break] -- OnFlags,
    dbg_wx_mon_win:show_option(State#state.win, auto_attach, OnFlags),
    lists:foreach(fun(Flag) ->
			  dbg_wx_mon_win:select(map(Flag), true)
		  end,
		  OnFlags),
    lists:foreach(fun(Flag) ->
			  dbg_wx_mon_win:select(map(Flag), false)
		  end,
		  OffFlags),
    State#state{attach=AutoAttach};
int_cmd({stack_trace, Flag}, State) ->
    dbg_wx_mon_win:show_option(State#state.win, stack_trace, Flag),
    dbg_wx_mon_win:select(map(Flag), true),
    State.


%%====================================================================
%% GUI auxiliary functions
%%====================================================================

menus() ->
    [{'File', [{'Load Settings...', 0},
	       {'Save Settings...', 2},
	       separator,
	       {'Exit', 0}]},
     {'Edit', [{'Refresh', no},
	       {'Kill All', no}]},
     {'Module', [{'Interpret...', 0},
		 {'Delete All Modules', no},
		 separator]},
     {'Process', [{'Step', 0},
		  {'Next', 0},
		  {'Continue', 0},
		  {'Finish ', 0},
		  separator,
		  {'Attach', 0},
		  {'Kill', no}]},
     {'Break', [{'Line Break...', 5},
		{'Conditional Break...', no},
		{'Function Break...', no},
		separator,
		{'Enable All', no},
		{'Disable All', no},
		{'Delete All', 0},
		separator]},
     {'Options', [{'Trace Window', no, cascade,
		   [{'Search Area', no, check},
		    {'Button Area', no, check},
		    {'Evaluator Area', no, check},
		    {'Bindings Area', no, check},
		    {'Trace Area', no, check}]},
		  {'Auto Attach', no, cascade,
		   [{'First Call', no, check},
		    {'On Break', no, check},
		    {'On Exit', no, check}]},
		  {'Stack Trace', no, cascade,
		   [{'Stack On, Tail', no, radio},
		    {'Stack On, No Tail', no, radio},
		    {'Stack Off', no, radio}]},
		  {'Back Trace Size...', no}]},
     {'Windows', []},
     {'Help', [{'Debugger', no}]}].

menus(enabled,  undefined) ->
    [];
menus(disabled, undefined) ->
    ['Step','Next','Continue','Finish ','Attach','Kill'];
menus(enabled,  #pinfo{status=exit}) ->
    ['Attach'];
menus(disabled, #pinfo{status=exit}) ->
    ['Step','Next','Continue','Finish ','Kill'];
menus(enabled,  #pinfo{status=break}) ->
    ['Step','Next','Continue','Finish ','Attach','Kill'];
menus(disabled, #pinfo{status=break}) ->
    [];
menus(enabled,  _PInfo) ->
    ['Attach','Kill'];
menus(disabled, _PInfo) ->
    ['Step','Next','Continue','Finish '].

shortcut(l) -> {always, 'Load Settings...'};
shortcut(v) -> {always, 'Save Settings...'};
shortcut(e) -> {always, 'Exit'};

shortcut(i) -> {always, 'Interpret...'};

shortcut(s) -> {if_enabled, 'Step'};
shortcut(n) -> {if_enabled, 'Next'};
shortcut(c) -> {if_enabled, 'Continue'};
shortcut(f) -> {if_enabled, 'Finish '};
shortcut(a) -> {if_enabled, 'Attach'};

shortcut(b) -> {always, 'Line Break...'};
shortcut(d) -> {always, 'Delete All'};

shortcut(_) -> false.

%% Enable/disable functionality depending on the state of the process
%% currently in Focus
gui_enable_functions(PInfo) ->
    Enabled = menus(enabled, PInfo),
    Disabled = menus(disabled, PInfo),
    dbg_wx_mon_win:enable(Enabled, true),
    dbg_wx_mon_win:enable(Disabled, false).

%% Map values used by int to/from GUI names
map('First Call')        -> init;               % Auto attach
map('On Exit')           -> exit;
map('On Break')          -> break;
map(init)                -> 'First Call';
map(exit)                -> 'On Exit';
map(break)               -> 'On Break';

map('Stack On, Tail')    -> all;               % Stack trace
map('Stack On, No Tail') -> no_tail;
map('Stack Off')         -> false;
map(all)                 -> 'Stack On, Tail';
map(true)                -> 'Stack On, Tail';
map(no_tail)             -> 'Stack On, No Tail';
map(false)               -> 'Stack Off'.


%%====================================================================
%% Debugger settings
%%====================================================================

load_settings(SFile, State) ->
    case file:read_file(SFile) of
	{ok, Binary} ->
	    case catch binary_to_term(Binary) of
		{debugger_settings, Settings} ->
		    load_settings2(Settings,
				   State#state{sfile=SFile,
					       changed=false});
		_Error -> State
	    end;
	{error, _Reason} -> State
    end.

load_settings2(Settings, State) ->
    {TraceWin, AutoAttach, StackTrace, BackTrace, Files, Breaks} =
	Settings,

    TraceWinAll = ['Button Area', 'Evaluator Area', 'Bindings Area',
		   'Trace Area'],
    lists:foreach(fun(Area) -> dbg_wx_mon_win:select(Area, true) end,
		  TraceWin),
    lists:foreach(fun(Area) -> dbg_wx_mon_win:select(Area, false) end,
		  TraceWinAll--TraceWin),

    case AutoAttach of
	false -> int:auto_attach(false);
	{Flags, Function} -> int:auto_attach(Flags, Function)
    end,

    int:stack_trace(StackTrace),

    dbg_wx_mon_win:show_option(State#state.win, back_trace, BackTrace),

    case State#state.mode of
	local -> lists:foreach(fun(File) -> int:i(File) end, Files);
	global -> lists:foreach(fun(File) -> int:ni(File) end, Files)
    end,
    lists:foreach(fun(Break) ->
			  {{Mod, Line}, [Status, Action, _, Cond]} =
			      Break,
			  int:break(Mod, Line),
			  if
			      Status==inactive ->
				  int:disable_break(Mod, Line);
			      true -> ignore
			  end,
			  if
			      Action/=enable ->
				  int:action_at_break(Mod,Line,Action);
			      true -> ignore
			  end,
			  case Cond of
			      CFunction when is_tuple(CFunction) ->
				  int:test_at_break(Mod,Line,CFunction);
			      null -> ignore
			  end
		  end,
		  Breaks),

    State#state{tracewin=TraceWin, backtrace=BackTrace}.

save_settings(SFile, State) ->
    Settings = {State#state.tracewin,
		int:auto_attach(),
		int:stack_trace(),
		State#state.backtrace,
		lists:map(fun(Mod) ->
				  int:file(Mod)
			  end,
			  int:interpreted()),
		int:all_breaks()},

    Binary = term_to_binary({debugger_settings, Settings}),
    case file:write_file(SFile, Binary) of
	ok ->
	    State#state{sfile=SFile, changed=false};
	{error, _Reason} ->
	    State
    end.


%%====================================================================
%% Other internal functions
%%====================================================================

registered_name(Pid) ->

    %% Yield in order to give Pid more time to register its name
    timer:sleep(200),

    Node = node(Pid),
    if
	Node==node() ->
	    case erlang:process_info(Pid, registered_name) of
		{registered_name, Name} -> Name;
		_ -> undefined
	    end;
	true ->
	    case rpc:call(Node,erlang,process_info,
			  [Pid,registered_name]) of
		{registered_name, Name} -> Name;
		_ -> undefined
	    end
    end.

trace_function(State) ->
    {dbg_wx_trace, start, [State#state.tracewin, State#state.backtrace]}.