aboutsummaryrefslogtreecommitdiffstats
path: root/lib/inviso/src/inviso.erl
blob: de42926ffed925159f05f2536651932d2bc26f4e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
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
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
%% ``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 via the world wide web 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.
%% 
%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
%% AB. All Rights Reserved.''
%% 
%%     $Id$
%%
%% Author: Ann-Marie L�f, [email protected]
%%         Lennart �hman, [email protected]
%%
%% Description: API module for the inviso system.
%% Inviso consists of a control component and possibly one or more runtime
%% components. This module is simply the API to the inviso system. All normal
%% calls goes through the control component.
%% ------------------------------------------------------------------------------

-module(inviso).

%% ------------------------------------------------------------------------------
%% Exported API functions.
%% ------------------------------------------------------------------------------

-export([start/0, start/1,
	 add_node/1, add_node/2, add_node_if_ref/1, add_node_if_ref/2,
	 add_nodes/2, add_nodes/3, add_nodes_if_ref/2, add_nodes_if_ref/3,
	 change_options/1, change_options/2,
	 init_tracing/1, init_tracing/2, 
	 stop_tracing/0, stop_tracing/1, 
	 clear/0, clear/1, clear/2,
	 flush/0,flush/1,
	 stop/0, stop_nodes/0, stop_nodes/1, stop_all/0,
	 tp/1,tp/2,tp/4,tp/5,tp/6,
	 tpl/1,tpl/2,tpl/4,tpl/5,tpl/6,
	 tpm_localnames/0,tpm_localnames/1,tpm_globalnames/0,tpm_globalnames/1,
	 init_tpm/4,init_tpm/5,init_tpm/7,init_tpm/8,
	 tpm/4,tpm/5,tpm/6,tpm/8,tpm/9,
	 tpm_tracer/4,tpm_tracer/5,tpm_tracer/6,tpm_tracer/8,tpm_tracer/9,
	 tpm_ms/5,tpm_ms/6,
	 tpm_ms_tracer/5,tpm_ms_tracer/6,
	 ctpm_ms/4,ctpm_ms/5,ctpm/3,ctpm/4,
	 ctpm_localnames/0,ctpm_localnames/1,ctpm_globalnames/0,ctpm_globalnames/1,
	 ctp/1,ctp/2,ctp/3,ctp/4,
	 ctpl/1,ctpl/2,ctpl/3,ctpl/4,
	 tf/1, tf/2, tf/3,
	 ctf/1, ctf/2, ctf/3,
	 ctp_all/0, ctp_all/1, ctf_all/0, ctf_all/1,
	 suspend/1, suspend/2,
	 cancel_suspension/0, cancel_suspension/1,
	 get_status/0, get_status/1,
	 get_tracerdata/0, get_tracerdata/1,
	 list_logs/0, list_logs/1,
	 fetch_log/2, fetch_log/3, fetch_log/4,
	 delete_log/0, delete_log/1, delete_log/2,
	 subscribe/0, subscribe/1, 
	 unsubscribe/0, unsubscribe/1]).

%% debuging inviso
-export([state/0, state/1]).

%% ------------------------------------------------------------------------------
%% Macros used in this module.
%% ------------------------------------------------------------------------------

-define(CONTROLLER,inviso_c).

%% Some function calls to runtime components may take long time, we must wait
%% longer than the standard timeout for a reply from the control component.
-define(CALL_TIMEOUT,60000).
%% ------------------------------------------------------------------------------



%% =============================================================================
%% CONTROL COMPONENT API FUNCTIONS.
%% =============================================================================

%% start()={ok,pid()}|{error,Reason}
%% start(Options)={ok,pid()}|{error,Reason} 
%%   Options=[Option,...], the options will be default options to runtime components
%%     later started. See add_node about available options.
%%     There are also options consumed by the control component:
%%       Option={subscribe,pid()}
%%
%% Starts a control component process on the local node. A control component must
%% be started before runtime components can be started manually.
start() ->
    gen_server:start({local,?CONTROLLER},?CONTROLLER,{self(),[]},[]).

start(Options) ->
    gen_server:start({local,?CONTROLLER},?CONTROLLER,{self(),Options},[]).
%% -----------------------------------------------------------------------------

%% add_node(Reference)=NodeResult|{error, Reason}
%% add_node(Reference,Options)=NodeResult|{error, Reason}
%%   Reference=PreviousReference = term(),
%%   Options=[Option,...],
%%   Option={dependency,Dep}
%%     Dep=integer()|'infinity'; The timeout before the runtime component will
%%       terminate if abandoned by this control component.
%%   Option={overload,Overload}; controls how and how often overload checks shall
%%       be performed. Instead of specifying a tuple, the atom 'overload' can be
%%       specified to state no loadcheck. The result will actually be the same
%%       if 'infinity' is used as intervall. It is sometimes necessary to
%%       initialize the overlaod check. This can be done with InitMFA. The
%%       loadchecker must then also be removed by using a RemoveMFA.
%%     Overload=Iterval (int() in milliseconds) |
%%         {LoadMF,Interval}|{LoadMF,Interval,InitMFA,RemoveMFA}
%%           LoadMF={Mod,Func}
%%           InitMFA,RemoveMFA={Mod,Func,ArgList}|void
%%           If just Interval is used, it means using a default overload check.
%%   NodeResult={ok,NAns}|{error,Reason} 
%%   NAns=new|{adopted,State,Status,PreviousReference}|already_added
%%   Status = running | {suspended, SReason}
%%
%% Starts or tries to connect to an existing runtime component at the local
%% node, regardless if the system is distributed or not.
%% Options will override any default options specified at start-up of the
%% control component.
add_node(Reference) ->
    gen_server:call(?CONTROLLER,{add_nodes,[node()],[],Reference,any_ref},?CALL_TIMEOUT).

add_node(Reference,Options) when list(Options) ->
    gen_server:call(?CONTROLLER,{add_nodes,[node()],Options,Reference,any_ref},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% add_node(Reference)=NodeResult|{error,{wrong_reference,OtherRef}}|{error,Reason}
%% add_node(Reference,Options)=NodeResult|{error,{wrong_reference,OtherRef}}|
%%   {error,Reason}
%%
%% As add_node/1,/2 but will only connect to an already existing runtime component
%% if its reference is the same as the one given as argument.
add_node_if_ref(Reference) ->
    gen_server:call(?CONTROLLER,{add_nodes,[node()],[],Reference,if_ref},?CALL_TIMEOUT).

add_node_if_ref(Reference,Options) when list(Options) ->
    gen_server:call(?CONTROLLER,{add_nodes,[node()],Options,Reference,if_ref},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% add_nodes(Nodes,Reference)={ok,NodeResults}|{error,Reason}
%% add_nodes(Nodes,Reference,Options)={ok,NodeResults}|{error,Reason}
%%   Nodes=[Node,...], 
%%   NodeResults=[{Node,NodeResult},...]
%%
%% As add_node/1,/2 but for the nodes specified in Nodes.
%% It is possible but not intended to use this function in a non-distributed
%% system. By speicifying node() as the node where the runtime component shall
%% be started. The return value will then follow the rules of non distributed
%% returnvalues and not have a node indicator.
add_nodes(Nodes,Reference) when list(Nodes) ->
    gen_server:call(?CONTROLLER,{add_nodes,Nodes,[],Reference,any_ref},?CALL_TIMEOUT).

add_nodes(Nodes,Reference,Options) when list(Nodes),list(Options) ->
    gen_server:call(?CONTROLLER,{add_nodes,Nodes,Options,Reference,any_ref},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% add_nodes_if_ref(Nodes,Reference)={ok,NodeResults}|{error,Reason}
%% add_nodes_if_ref(Nodes,Reference,Options)={ok,NodeResults}|{error,Reason}
%%
%% As add_nodes/2,/3 but will only connect to an already existing runtime component
%% if its reference is the same as the one given as argument.
add_nodes_if_ref(Nodes,Reference) when list(Nodes) ->
    gen_server:call(?CONTROLLER,{add_nodes,Nodes,[],Reference,if_ref},?CALL_TIMEOUT).

add_nodes_if_ref(Nodes,Reference,Options) when list(Nodes),list(Options) ->
    gen_server:call(?CONTROLLER,{add_nodes,Nodes,Options,Reference,if_ref},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% change_options(Options)={ok,NodeResults}|NodeResult|{error,Reason}
%% change_options(Nodes,Options)={ok,NodeResults}|{error,Reason}
%%   Nodes=[Node,...], 
%%   Options= see add_node and add_nodes on available options.
%%
%% Change options on all or specified Nodes. This may result in for instance
%% reinitialization of overloadcheck.
change_options(Options) when list(Options) ->
    gen_server:call(?CONTROLLER,{change_options,all,Options},?CALL_TIMEOUT).
change_options(Nodes,Options) when list(Nodes),list(Options)  ->
    gen_server:call(?CONTROLLER,{change_options,Nodes,Options},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% init_tracing(TracerData)={ok,[{Node,NodeResult}]} | NodeResult | {error,Reason}
%% init_tracing(TracerList)={ok,[{Node,NodeResult}]} | {error,Reason}
%% init_tracing(Nodes,TracerData)={ok,[{Node,NodeResult}]}|{error,Reason}
%%   TracerData = [{trace,LogTD} [,{ti,TiTD}]}] | LogTD
%%   LogTD      = {HandlerFun,Data} | collector | {relayer,pid()} |  
%%                {relayer,CollectingNode} | {ip,IPPortParameters} |
%%                {file,FilePortParameters}
%%   TiTD       = {file,FileName} | {file,FileName,TiMFA}
%%   TiMFA      = {Module,Function,ArgumentList} initiating a private loopdata
%%                inside the meta-tracer.
%%   TracerList = [{Node,TracerData}],
%%   IPPortParameters = Portno | {Portno, Qsiz}
%%   Qsiz = 
%%   FilePortParameters = {Filename, wrap, Tail, {time, WrapTime}, WrapCnt} |
%%                        {FileName, wrap, Tail, WrapSize, WrapCnt} |
%%                        {FileName, wrap, Tail, WrapSize} |
%%                        {FileName, wrap, Tail} | FileName
%%                          Tail =/= ""
%%   HandlerFun is a function taking 2 arguments.
%%   Nodes = [node()], 
%%   CollectingNode = pid() | node(),
%%   NodeResult = {ok,LogResults} | {error, NReason} 
%%     LogResults=[LogResult,...]
%%       LogResult={trace_log,LogRes} | {ti_log,LogRes}
%%         LogRes=ok|{error,Reason}
%%
%% Starts tracing on the nodes specified. If just providing a TracerData tracing
%% will be initiated on all our nodes. If it is the non distributed case, that
%% means only on the local non distributed node.
%%
%% {HandlerFun,Data}
%%   Will use the runtime components own process as tracer and handle all
%%   incomming trace message using HandlerFun.
%% {relayer,CollectingNode}
%%   The runtime component addressed will act tracer and relay all incomming trace
%%   messages to Node or Pid, if CollectingNode is not a traced node connected 
%%   to the controll component, the init_tracing call will return an error.
%%   Note that {relayer, Node} only is syntactical sugar for
%%   {relayer, rpc:call(Node,erlang,whereis,[inviso_rt])}
%% collector
%%   The runtime component is used as tracer or collector of relayed 
%%   trace messages using the default handler writing them to io.
%% ip | file - will open a trace-port on Node using PortParameters
init_tracing(TracerDataList) ->
    gen_server:call(?CONTROLLER,{init_tracing,TracerDataList},?CALL_TIMEOUT).

init_tracing(Nodes,TracerData) when list(Nodes) ->
    gen_server:call(?CONTROLLER,{init_tracing,Nodes,TracerData},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% stop_tracing(Nodes)={ok,NodeResults}|{error,Reason}
%% stop_tracing()={ok,NodeResults}|NodeResult
%%   Nodes=[Node,...], 
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult={ok,State}|{error,Reason}
%%     State=new|idle
%% Stops tracing on all or specified Nodes. Flushes trace buffert, 
%% closes trace port and removes all trace flags and meta-patterns.
%% The nodes are called in parallel.
stop_tracing() ->
    gen_server:call(?CONTROLLER,{stop_tracing,all},?CALL_TIMEOUT).

stop_tracing(Nodes) when is_list(Nodes) ->
    gen_server:call(?CONTROLLER,{stop_tracing,Nodes},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% clear()={ok,NodeResults}|NodeResult
%% clear(Nodes,Options)={ok,NodeResults}|{error,Reason}
%% clear(Options)={ok,NodeResults}|NodeResult|{error,Reason}
%%   Nodes=[Node,...], 
%%   Options=[Option,...],
%%   Option=keep_trace_patterns|keep_log_files
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult={ok,{new,Status}}|{error,Reason}
%%     Status=running|{suspended,SReason}
%%
%% Stops all tracing including removing meta-trace patterns. If the node is tracing
%% or idle, logs belonging to the current tracerdata are removed. Hence the node
%% is returned to state 'new'. Note that node can still be suspended.
clear() ->
    gen_server:call(?CONTROLLER,{clear,all,[]},?CALL_TIMEOUT).

clear(Nodes) when list(Nodes) ->
    gen_server:call(?CONTROLLER,{clear,Nodes,[]},?CALL_TIMEOUT).

clear(Nodes,Options) when list(Nodes),list(Options) ->
    gen_server:call(?CONTROLLER,{clear,Nodes,Options},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% flush()={ok,NodeResults} | NodeResult
%% flush(Nodes)={ok,NodeResults}
%%   Nodes=[Node,...]
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult=ok | {error,Reason}
%% Sends a flush request to the trace-port driver on the nodes in Nodes.
%% There will be an error for nodes that are not tracing. It is not an error to
%% try to flush runtime components not using a trace-port.
flush() ->
    gen_server:call(?CONTROLLER,{flush,all},?CALL_TIMEOUT).
flush(Nodes) when is_list(Nodes) ->
    gen_server:call(?CONTROLLER,{flush,Nodes},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% stop()=shutdown
%%
%% Stops the controll component. Runtime components are left as is. They will
%% behave according to their dependency values.
stop() ->
    case catch gen_server:call(?CONTROLLER,stop,?CALL_TIMEOUT) of
	shutdown ->
	    shutdown;
	{'EXIT',{noproc,_}} ->
	    shutdown;
	{'EXIT',Reason} ->
	    exit(Reason)
    end.
%% -----------------------------------------------------------------------------

%% stop_nodes()={ok,NodeResults}|NodeResult
%% stop_nodes(Nodes)={ok,NodeResults}|{error,Reason}
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult=ok|{error,Reason}
%%
%% Stops runtime component on Nodes. stop_nodes/0 will if the control component
%% is running on a distributed node stop all runtime components. And if running
%% on a non distributed node, stop the local and only runtime component.
stop_nodes() ->
    gen_server:call(?CONTROLLER,{stop_nodes,all},?CALL_TIMEOUT).
stop_nodes(Nodes) when is_list(Nodes) ->
    gen_server:call(?CONTROLLER,{stop_nodes,Nodes},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% stop_all()={ok,NodeResults}|NodeResult
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult=ok|{error,Reason}
%%
%% A combination of stop/0 and stop_nodes/0.
stop_all() ->
    gen_server:call(?CONTROLLER, stop_all,?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% tp(Nodes,Module,Function,Arity,MatchSpec,Opts)={ok,NodeResults}|{error,Reason}
%% tp(Nodes,Module,Function,Arity,MatchSpec)={ok,NodeResults}|{error,Reason}
%% tp(Module,Function,Arity,MatchSpec)={ok,NodeResults}|NodeResult|{error,Reason}
%% tp(Nodes,PatternList)={ok,NodeResults}|{error,Reason}
%% tp(PatternList)={ok,NodeResults}|NodeResult|{error,Reason}
%%   Nodes=[Node,...] 
%%   Module,Function=atom() | '_'
%%   Arity=integer() | '_'
%%   MatchSpec=true|false|[]| matchspec()
%%   PatternList=[Pattern,...],
%%   Pattern={Module,Function,Arity,MatchSpec,Opts},
%%   Opts=[Opt,...]
%%     Opt='only_loaded'; means that the runtime component shall not try to load
%%           a module should it not already be present in the runtime system.
%%   NodeResults=[NodeResult,...]
%%   NodeResult={ok,[Ans]}|{error,Reason},
%%   Ans=integer()|{error,Reason}
%%
%% Set trace pattern (global) on specified or all Nodes. The integer replied
%% if the call was successfully describes the matched number of functions.
%% The functions without a Nodes argument means all nodes, in a non-distributed
%% environment it means the local node.
%% When calling several nodes, the nodes are called in parallel.
tp(Nodes,Module,Function,Arity,MatchSpec,Opts) ->
    trace_pattern(Nodes,[{Module,Function,Arity,MatchSpec,Opts}],[global]).

tp(Nodes,Module,Function,Arity,MatchSpec) when list(Nodes) -> 
    trace_pattern(Nodes,[{Module,Function,Arity,MatchSpec,[]}],[global]);
tp(Module,Function,Arity,MatchSpec,Opts) when atom(Module) ->
    trace_pattern(all,[{Module,Function,Arity,MatchSpec,Opts}],[global]).

tp(Module,Function,Arity,MatchSpec) ->
    trace_pattern(all,[{Module,Function,Arity,MatchSpec,[]}],[global]).

tp(Nodes,PatternList) ->
    trace_pattern(Nodes,PatternList,[global]).

tp(PatternList) ->
    trace_pattern(all,PatternList,[global]).
%% -----------------------------------------------------------------------------

%% tpl(Nodes,Module,Function,Arity,MatchSpec)={ok,NodeResults}|{error,Reason}
%% tpl(Module,Function,Arity,MatchSpec)={ok,NodeResults}|NodeResult|{error,Reason}
%% tpl(Nodes,PatternList)={ok,NodeResults}|{error,Reason}
%% tpl(PatternList)={ok,NodeResults}|NodeResult|{error,Reason}
%%   see tp/X for description.
%%
%% Set trace pattern (local) on specified or all Nodes. The integer replied
%% if the command was successfully describes the matched number of functions.
%% The functions without a Nodes argument means all nodes, in a non-distributed
%% environment it means the local node.
%% When calling several nodes, the nodes are called in parallel.
tpl(Nodes,Module,Function,Arity,MatchSpec,Opts) ->
    trace_pattern(Nodes,[{Module,Function,Arity,MatchSpec,Opts}],[local]).

tpl(Nodes,Module,Function,Arity,MatchSpec) when list(Nodes) ->
    trace_pattern(Nodes,[{Module,Function,Arity,MatchSpec,[]}],[local]);
tpl(Module,Function,Arity,MatchSpec,Opts) when atom(Module) ->
    trace_pattern(all,[{Module,Function,Arity,MatchSpec,Opts}],[local]).

tpl(Module,Function,Arity,MatchSpec) ->
    trace_pattern(all,[{Module,Function,Arity,MatchSpec,[]}],[local]).

tpl(Nodes, PatternList) ->
    trace_pattern(Nodes,PatternList,[local]).

tpl(PatternList) ->
    trace_pattern(all,PatternList,[local]).
%% -----------------------------------------------------------------------------

%% ctp(Nodes,Module,Function,Arity)={ok,NodeResults}|{error,Reason}
%% ctp(Module,Function,Arity)={ok,NodeResults}|NodeResult|{error,Reason}
%% ctp(Nodes,PatternList)={ok,NodeResults}|{error,Reason}
%% ctp(PatternList)={ok,NodeResults}|NodeResult|{error,Reason}
%%   PatternList=[{Mod,Func,Arity},...]
%%   see tp/X for other argument descriptions.
%%
%% Clear trace pattern (global) on specified or all Nodes. The integer replied
%% if the call was successfully describes the matched number of functions.
%% The functions without a Nodes argument means all nodes, in a non-distributed
%% environment it means the local node.
%% When calling several nodes, the nodes are called in parallel.
ctp(Nodes,Module,Function,Arity) ->
    trace_pattern(Nodes,[{Module,Function,Arity,false,[only_loaded]}],[global]).

ctp(Module,Function,Arity) ->
    trace_pattern(all,[{Module,Function,Arity,false,[only_loaded]}],[global]).

ctp(Nodes,PatternList) when list(PatternList) ->
    trace_pattern(Nodes,
		  lists:map(fun({M,F,A})->{M,F,A,false,[only_loaded]} end,PatternList),
		  [global]).

ctp(PatternList) when list(PatternList) ->
    trace_pattern(all,
		  lists:map(fun({M,F,A})->{M,F,A,false,[only_loaded]} end,PatternList),
		  [global]).
%% -----------------------------------------------------------------------------

%% ctpl(Nodes,Module,Function,Arity)={ok,NodeResults}|{error,Reason}
%% ctpl(Module,Function,Arity)={ok,NodeResults}|NodeResult|{error,Reason}
%% ctpl(Nodes,PatternList)={ok,NodeResults}|{error,Reason}
%% ctpl(PatternList)={ok,NodeResults}|NodeResult|{error,Reason}
%%   see ctp/X for argument description.
%%
%% Clear trace pattern (local) on specified or all Nodes. The integer replied
%% if the call was successfully describes the matched number of functions.
%% The functions without a Nodes argument means all nodes, in a non-distributed
%% environment it means the local node.
%% When calling several nodes, the nodes are called in parallel.
ctpl(Nodes,Module,Function,Arity) ->
    trace_pattern(Nodes,[{Module,Function,Arity,false,[only_loaded]}],[local]).

ctpl(Module,Function,Arity) ->
    trace_pattern(all,[{Module,Function,Arity,false,[only_loaded]}],[local]).

ctpl(Nodes,PatternList) when list(PatternList) ->
    trace_pattern(Nodes,
		  lists:map(fun({M,F,A})->{M,F,A,false,[only_loaded]} end,PatternList),
		  [local]).

ctpl(PatternList) when list(PatternList) ->
    trace_pattern(all,
		  lists:map(fun({M,F,A})->{M,F,A,false,[only_loaded]} end,PatternList),
		  [local]).
%% -----------------------------------------------------------------------------

%% Help function doing the control component calling for all tp/X, tpl/X, ctp/X
%% and ctpl/X functions.
trace_pattern(Nodes,Patterns,FlagList)  -> 
    gen_server:call(?CONTROLLER, {trace_pattern, Nodes, Patterns, FlagList},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------
%% -----------------------------------------------------------------------------

%% tf(Nodes,PidSpec,FlagList)={ok,NodeResults}|{error,Reason}
%% tf(PidSpec,FlagList)={ok,NodeResults}|NodeResult|{error,Reason}
%% tf(Nodes,TraceConfList)={ok,NodeResults}|{error,Reason}
%% tf(NodeTraceConfList)={ok,NodeResults}|{error,Reason}
%% tf(TraceConfList)={ok,NodeResults}|NodeResult|{error,Reason}
%%   Nodes=[Node,...],
%%   NodeTraceConfList=[{Node,TraceConfList}]
%%   TraceConfList=[{PidSpec,FlagList},...],
%%   FlagList=[Flags],
%%   PidSpec=all|new|existing|pid()|locally_registered_name()
%%   Flags= all process trace flags allowed.
%%   NodeResult={ok,[Ans]}|{error,Reason},
%%   Ans=integer() | {error,Reason}
%%
%% Set process trace flags on processes on all or specified Nodes. The integer
%% return if the call was successfully describes the matched number of processes.
%% The functions without a Nodes argument means all nodes, in a non-distributed
%% environment it means the local node.
%% There are many combinations which does not make musch scense. For instance
%% specifying a certain pid at all nodes. Or an empty TraceConfList for all
%% nodes.
%% When calling several nodes, the nodes are called in parallel.
tf(Nodes,PidSpec,FlagList) when list(Nodes),list(FlagList) ->
    trace_flags(Nodes,[{PidSpec, FlagList}],true).

tf(Nodes,TraceConfList) when list(Nodes),list(TraceConfList) -> 
    trace_flags(Nodes,TraceConfList,true);
tf(PidSpec,FlagList) when list(FlagList) -> 
    trace_flags(all,[{PidSpec,FlagList}],true).

tf(ArgList) when list(ArgList) ->            % This one has triple functionality!
    case ArgList of
	[{_Process,Flags}|_] when list(Flags),atom(hd(Flags))-> % A call to all nodes.
	    trace_flags(all,ArgList,true);
	[{_Node,TraceConfList}|_] when list(TraceConfList),tuple(hd(TraceConfList)) ->
	    trace_flags(ArgList,true);
	[{_Node,_TraceConfList,_How}|_] ->
	    trace_flags(ArgList);
	[] ->                                % Stupid but allowed.
	    trace_flags(all,ArgList,true)    % Actually doesn't matter which we choose.
    end.
%% -----------------------------------------------------------------------------

%% ctf(Nodes,PidSpec,FlagList)={ok,NodeResults}|{error,Reason}
%% ctf(PidSpec,FlagList)={ok,NodeResults}|NodeResult|{error,Reason}
%% ctf(Nodes,TraceConfList)={ok,NodeResults}|{error,Reason}
%% ctf(TraceConfList)={ok,NodeResults}|NodeResult|{error,Reason}
%%   see tf/X for arguments.
%%
%% Clear process trace flags on all or specified Nodes. The integer replied
%% if the command was successfully describes the matched number of processes.
%% The functions without a Nodes argument means all nodes, in a non-distributed
%% environment it means the local node.
%% When calling several nodes, the nodes are called in parallel.
ctf(Nodes,PidSpec,FlagList) when list(Nodes),list(FlagList) ->
    trace_flags(Nodes,[{PidSpec,FlagList}],false).

ctf(Nodes,TraceConfList) when list(Nodes),list(TraceConfList) -> 
    trace_flags(Nodes,TraceConfList,false);
ctf(PidSpec,FlagList) when list(FlagList) -> 
    trace_flags(all,[{PidSpec,FlagList}],false).

ctf(TraceConfList) when list(TraceConfList) -> 
    trace_flags(all,TraceConfList,false).
%% -----------------------------------------------------------------------------

%% ctf_all(Nodes)={ok,NodeResults}|{error,Reason}
%% ctf_all()={ok,NodeResults}|NodeResult|{error,Reason}
%%   Nodes=[Node,...],
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult=ok|{error,Reason},
%%
%% Clears all trace flags on all or specified nodes. Just for convenience.
ctf_all() ->
    gen_server:call(?CONTROLLER,{trace_flags,all,[{all,[all]}],false},?CALL_TIMEOUT).

ctf_all(Nodes) ->
    gen_server:call(?CONTROLLER,{trace_flags,Nodes,[{all,[all]}],false},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% Help function to tf/X and ctf/X making the call to the control component.
trace_flags(Nodes, TraceConfList, How) -> 
    gen_server:call(?CONTROLLER, {trace_flags, Nodes, TraceConfList, How},?CALL_TIMEOUT).

trace_flags(NodeTraceConfList,How) ->
    gen_server:call(?CONTROLLER,{trace_flags,NodeTraceConfList,How},?CALL_TIMEOUT).

trace_flags(NodeTraceConfListHow) ->
    gen_server:call(?CONTROLLER,{trace_flags,NodeTraceConfListHow},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------
%% -----------------------------------------------------------------------------

%% tpm_localnames()={ok,NodeResults}|NodeResult|{error,Reason}
%% tpm_localnames(Nodes)={ok,NodeResults}|{error,Reason}
%%   NodeResults=[{Node,NodeResult},...]
%%     NodeResult={ok,N}|{error,Reason}, Note that N can only be 0 or 1.
%%
%% Quick version for setting meta-trace patterns on erlang:register/2. It uses
%% a default CallFunc and ReturnFunc in the meta-tracer server.
%% The main purpose of this function is to create ti-log entries for printing
%% the aliases for process instead of their process identities.
tpm_localnames() ->
    tpm_localnames(all).

tpm_localnames(Nodes) ->
    gen_server:call(?CONTROLLER,{meta_pattern,Nodes,{local_register,[]}},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% tpm_globalnames()={ok,NodeResults}|NodeResult|{error,Reason}
%% tpm_globalnames(Nodes)={ok,NodeResults}|{error,Reason}
%%   NodeResults=[{Node,NodeResult},...]
%%     NodeResult={SubResult,SubResult}
%%       SubResult={ok,N}|{error,Reason}, Note that N can only be 0 or 1.
%% As tpm_locanames/0,/1 but for registering names with global. Note that this
%% actually involves setting meta trace patterns on two functions in global.
tpm_globalnames() ->
    tpm_globalnames(all).

tpm_globalnames(Nodes) ->
    gen_server:call(?CONTROLLER,{meta_pattern,Nodes,{global_register,[]}},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% init_tpm(Mod,Func,Arity,CallFunc)={ok,NodeResults}|NodeResult|{error,Reason}
%% init_tpm(Nodes,Mod,Func,Arity,CallFunc)={ok,NodeResults}|{error,Reason}
%% init_tpm(Mod,Func,Arity,InitFunc,CallFunc,ReturnFunc,RemoveFunc)=
%%   {ok,NodeResults}|NodeResult|{error,Reason}
%% init_tpm(Nodes,Mod,Func,Arity,InitFunc,CallFunc,ReturnFunc,RemoveFunc)=
%%   {ok,NodeResults}|{error,Reason}
%%
%%   Mod,Func=Pointing out the function which shall be meta traced, atom().
%%   Arity=As above, integer().
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult=ok|{error,Reason}
%%
%%   InitFunc,RemoveFunc={Module,Function}|fun(), functions being called when
%%     to initialize the public loopdata structure, and to reset it.
%%       InitFunc(Mod,Func,Arity,PublLD)->{ok,NewPublLD,Output}
%%         Supposed to initialize whatever needs to be done before
%%         handling any incoming meta-trace message for the Mod:Func/Arity.
%%       RemoveFunc(Mod,Func,Arity,PublLD)->{ok,NewPublLD}
%%         Called when meta tracing of Mod:Func/Arity is stopped. It is supposed
%%         to clear datastructures away from the PublLD.
%% Initializes the public loopdata for this function. Note that we can not use wildcards
%% here (even if it is perfectly legal in Erlang). It also sets the CallFunc and
%% ReturnFunc for the meta traced function. The function is hence ready to be
%% meta traced with either tpm/5 or tpm_ms/5.
%% When calling several nodes, the nodes are called in parallel.
init_tpm(Mod,Func,Arity,CallFunc) ->
    init_tpm(all,Mod,Func,Arity,CallFunc).

init_tpm(Nodes,Mod,Func,Arity,CallFunc) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,
		     Nodes,
		     {init_tpm,
		      [Mod,Func,Arity,CallFunc]}},
		    ?CALL_TIMEOUT).

init_tpm(Mod,Func,Arity,InitFunc,CallFunc,ReturnFunc,RemoveFunc) ->
    init_tpm(all,Mod,Func,Arity,InitFunc,CallFunc,ReturnFunc,RemoveFunc).

init_tpm(Nodes,Mod,Func,Arity,InitFunc,CallFunc,ReturnFunc,RemoveFunc) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,
		     Nodes,
		     {init_tpm,
		      [Mod,Func,Arity,InitFunc,CallFunc,ReturnFunc,RemoveFunc]}},
		    ?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% tpm(Mod,Func,Arity,MS)={ok,NodeResults}|NodeResult|{error,Reason}
%% tpm(Nodes,Mod,Func,Arity,MS)={ok,NodeResults}|{error,Reason}
%% tpm(Mod,Func,Arity,MS,CallFunc)={ok,NodeResults}|NodeResults|{error,Reason}
%% tpm(Nodes,Mod,Func,Arity,MS,CallFunc)={ok,NodeResults}|{error,Reason}
%% tpm(Mod,Func,Arity,MS,InitFunc,CallFunc,ReturnFunc,RemoveFunc)=
%%   {ok,NodeResults}|NodeResults|{error,Reason}
%% tpm(Nodes,Mod,Func,Arity,MS,InitFunc,CallFunc,ReturnFunc,RemoveFunc)=
%%   {ok,NodeResults}|{error,Reason}
%%
%%   Mod,Func=atom() and not '_'.
%%   Arity=integer()
%%   MS=list(), matchspecification.
%%   Nodes=List of nodenames.
%%   InitFunc,CallFunc,ReturnFunc,RemoveFunc={Module,Function}|fun(),
%%     functions being called when these functions are called by the meta trace
%%     server at certain events.
%%       CallFunc(CallingPid,ActualArgList,PublLD)->{ok,NewPrivLD,Output}
%%       ReturnFunc(CallingPid,ReturnValue,PublLD)->{ok,NewPrivLD,Output}
%%         When a call respectively return_from trace message arrives for the meta
%%         traced function, the corresponding function is called.
%%         The ReturnFunc must handle the fact that a return_from message arrives
%%         for a call which was never noticed. This because the message queue of the
%%         meta tracer may have been emptied.
%%
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult={ok,N}|{error,Reason}, Note that N can only be 0 or 1.
%%
%% Activates meta-tracing in the inviso_rt_meta tracer. Except when using tpm/6,/8
%% and /9 the function must first have been initiated using init_tpm. If running
%% a non distributed system the variants without Node shall be used. If running
%% in a distributed environment, without Node means all our nodes.
%% When calling several nodes, the nodes are called in parallel.
tpm(Mod,Func,Arity,MS) ->
    tpm(all,Mod,Func,Arity,MS).

tpm(Nodes,Mod,Func,Arity,MS) when integer(Arity) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,Nodes,{tpm,[Mod,Func,Arity,MS]}});
tpm(Mod,Func,Arity,MS,CallFunc) when integer(Arity) ->
    tpm(all,Mod,Func,Arity,MS,CallFunc).

tpm(Nodes,Mod,Func,Arity,MS,CallFunc) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,Nodes,{tpm,[Mod,Func,Arity,MS,CallFunc]}}).

tpm(Mod,Func,Arity,MS,InitFunc,CallFunc,ReturnFunc,RemoveFunc) ->
    tpm(all,Mod,Func,Arity,MS,InitFunc,CallFunc,ReturnFunc,RemoveFunc).

tpm(Nodes,Mod,Func,Arity,MS,InitFunc,CallFunc,ReturnFunc,RemoveFunc) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,
		     Nodes,
		     {tpm,
		      [Mod,Func,Arity,MS,InitFunc,CallFunc,ReturnFunc,RemoveFunc]}},
		    ?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% Same as tpm/X but the meta tracer will append {tracer,Tracer} to any enable
%% list in a trace body action term.
tpm_tracer(Mod,Func,Arity,MS) ->
    tpm_tracer(all,Mod,Func,Arity,MS).

tpm_tracer(Nodes,Mod,Func,Arity,MS) when integer(Arity) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,Nodes,{tpm_tracer,[Mod,Func,Arity,MS]}},
		    ?CALL_TIMEOUT);
tpm_tracer(Mod,Func,Arity,MS,CallFunc) when integer(Arity) ->
    tpm_tracer(all,Mod,Func,Arity,MS,CallFunc).

tpm_tracer(Nodes,Mod,Func,Arity,MS,CallFunc) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,Nodes,{tpm_tracer,[Mod,Func,Arity,MS,CallFunc]}}).

tpm_tracer(Mod,Func,Arity,MS,InitFunc,CallFunc,ReturnFunc,RemoveFunc) ->
    tpm_tracer(all,Mod,Func,Arity,MS,InitFunc,CallFunc,ReturnFunc,RemoveFunc).

tpm_tracer(Nodes,Mod,Func,Arity,MS,InitFunc,CallFunc,ReturnFunc,RemoveFunc) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,
		     Nodes,
		     {tpm_tracer,
		      [Mod,Func,Arity,MS,InitFunc,CallFunc,ReturnFunc,RemoveFunc]}},
		    ?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% tpm_ms(Mod,Func,Arity,MSname,MS)={ok,NodeResults}|NodeResult|{error,Reason}
%% tpm_ms(Nodes,Mod,Func,Arity,MSname,MS)={ok,NodeResults}|{error,Reason}
%%   Nodes= List of all nodes where the function shall be carried out.
%%   Mod,Func=Pointing out the function to which we shall add a match-spec., atom().
%%   Arity=As above, integer().
%%   MSname=A name to be used if this MS shall be removed later. term().
%%   MatchSpec=List of match specification, Remember {return_trace}
%%     if expecting return_from messages.
%%   NodeResults=[{Node,NodeResult},...]
%%     NodeResult={ok,1}|{ok,0}|{error,Reason} where {ok,1} indicates that
%%       setting the matchspecification for the function succeeded.
%%
%% This function adds a list of match-specs to the already existing ones. It
%% uses an internal database to keep track of existing match-specs. If the
%% match-spec does not result in any meta traced functions (for whatever reason),
%% the MS is not saved in the database. The previously known match-specs are
%% not removed.
%% The function must previously have been initiated in order for this function
%% to add a match-spec.
%% When calling several nodes, the nodes are called in parallel.
tpm_ms(Mod,Func,Arity,MSname,MS) ->
    tpm_ms(all,Mod,Func,Arity,MSname,MS).

tpm_ms(Nodes,Mod,Func,Arity,MSname,MS) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,Nodes,{tpm_ms,[Mod,Func,Arity,MSname,MS]}},
		    ?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% Same as tpm_ms/5, /6 but the meta tracer will append {tracer,Tracer} to any enable
%% list in a trace body action term.
tpm_ms_tracer(Mod,Func,Arity,MSname,MS) ->
    tpm_ms_tracer(all,Mod,Func,Arity,MSname,MS).

tpm_ms_tracer(Nodes,Mod,Func,Arity,MSname,MS) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,Nodes,{tpm_ms_tracer,[Mod,Func,Arity,MSname,MS]}},
		    ?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% ctpm_ms(Mod,Func,Arity,MSname)={ok,NodeResults}|NodeResult|{error,Reason}
%% ctpm_ms(Nodes,Mod,Func,Arity,MSname)={ok,NodeResults}|{error,Reason}
%%   NodeResults=[{Node,NodeResult},...]
%%     NodeResult=ok|{error,Reason}
%%
%% Removes a named match-spec from the meta traced function. Note that it never
%% is a fault to remove an MS. Not even from a function which is non existant.
%% When calling several nodes, the nodes are called in parallel.
ctpm_ms(Mod,Func,Arity,MSname) ->
    ctpm_ms(all,Mod,Func,Arity,MSname).

ctpm_ms(Nodes,Mod,Func,Arity,MSname) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,Nodes,{ctpm_ms,[Mod,Func,Arity,MSname]}},
		    ?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% ctpm(Mod,Func,Arity)={ok,NodeResults}|NodeResult|{error,Reason}
%% ctpm(Node,Mod,Func,Arity)={ok,NodeResults}|{error,Reason}
%%   NodeResults=[{Node,NodeResult},...]
%%     NodeResult=ok|{error,Reason}
%%
%% Removes the meta trace pattern for the function, means stops generating output
%% for this function. The public LD may be cleared by the previously entered
%% RemoveFunc.
%% When calling several nodes, the nodes are called in parallel.
ctpm(Mod,Func,Arity) ->
    ctpm(all,Mod,Func,Arity).

ctpm(Nodes,Mod,Func,Arity) ->
    gen_server:call(?CONTROLLER,
		    {meta_pattern,Nodes,{ctpm,[Mod,Func,Arity]}},
		    ?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% ctpm_localnames()={ok,NodeResults}|NodeResult|{error,Reason}
%% ctpm_localnames(Nodes)={ok,NodeResults}|{error,Reason}
%%   NodeResults=[{Node,NodeResult},...]
%%     NodeResult=ok|{error,Reason}
%%
%% Removes meta-trace pattern for erlang:register/2, previously set by tpm_localnames.
%% When calling several nodes, the nodes are called in parallel.
ctpm_localnames() ->
    ctpm_localnames(all).

ctpm_localnames(Nodes) ->
    gen_server:call(?CONTROLLER,{meta_pattern,Nodes,{remove_local_register,[]}},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% ctpm_localnames()={ok,NodeResults}|NodeResult|{error,Reason}
%% ctpm_localnames(Nodes)={ok,NodeResults}|{error,Reason}
%%   NodeResults=[{Node,NodeResult},...]
%%     NodeResult={SubResult,Subresult}
%%       SubResult=ok|{error,Reason}
%%
%% Removes meta-trace pattern for the register functions in global. Note that there
%% are two of them.
%% When calling several nodes, the nodes are called in parallel.
ctpm_globalnames() ->
    ctpm_globalnames(all).

ctpm_globalnames(Nodes) ->
    gen_server:call(?CONTROLLER,{meta_pattern,Nodes,{remove_global_register,[]}},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% ctp_all(Nodes)={ok,NodeResults}|{error,Reason}
%% ctp_all()={ok,NodeResults}|NodeResult|{error,Reason}
%%   Nodes=[Node,...], 
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult=ok|{error,Reason},
%%
%% Clears all both global and local trace patterns on all or specified nodes.
%% Does not effect meta patterns.
ctp_all() ->
    gen_server:call(?CONTROLLER,{ctp_all,all},?CALL_TIMEOUT).

ctp_all(Nodes) ->
    gen_server:call(?CONTROLLER,{ctp_all,Nodes},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% suspend(Nodes,Reason)={ok,NodeResults}|{error,Reason}
%% suspend(Reason)={ok,NodeResults}|NodeResult|{error,Reason}
%%   Nodes=[Node],
%%   Reason=term(); supposed to describe the reason why suspended.
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult=ok|{error,Reason},
%%
%% Suspend all or specified Nodes with reason Reason. Suspend means that all
%% process trace flags are removed and all meta-patterns.
suspend(Nodes, Reason) ->
    gen_server:call(?CONTROLLER,{suspend,Reason,Nodes},?CALL_TIMEOUT).

suspend(Reason) ->
    gen_server:call(?CONTROLLER,{suspend,Reason,all},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% cancel_suspension(Nodes)={ok,NodeResults}|{error,Reason}
%% cancel_suspension()={ok,NodeResults}|NodeResult|{error,Reason}
%%   Nodes=[Node,...],
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult=ok|{error,Reason},
%% Cancel suspension on all or specified Nodes. Note that this does not imply
%% that "business" is resumed as before. You must reactivate flags and meta-patter
%% your self.
cancel_suspension(Nodes) ->
    gen_server:call(?CONTROLLER,{cancel_suspension,Nodes},?CALL_TIMEOUT).

cancel_suspension() ->
    gen_server:call(?CONTROLLER,{cancel_suspension,all},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% get_status(Nodes)={ok,NodeResults}|{error,Reason}
%% get_status()={ok,NodeResults}|NodeResult|{error,Reason}
%%   Nodes=[Node,...],
%%   NodeResults=[{Node,NodeResult},...]
%%   NodeResult={ok,{State,Status}}|{error,Reason},
%%   State=new|idle|tracing
%%   Status=running|{suspended,SReason}
%%
%% Get Status form all or specified runtime components.
get_status(Nodes) when list(Nodes) ->
    gen_server:call(?CONTROLLER,{get_status,Nodes},?CALL_TIMEOUT).

get_status() ->
    gen_server:call(?CONTROLLER,{get_status,all},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% get_tracerdata()={ok,NodeResults}|NodeResult|{error,Reason}
%% get_tracerdata(Nodes)={ok,NodeResults}|{error,Reason}
%%   Nodes=[Node,...],
%%   NodeResult={ok,NResult}|{error,Reason},
%%   NResult=TracerData|no_tracerdata
%%   TracerData will be exactly as it was specified when doing init_tracing.
%%
%% Get TracerData form all or specified runtime components.
get_tracerdata() ->
    gen_server:call(?CONTROLLER,{get_tracerdata,all},?CALL_TIMEOUT).

get_tracerdata(Nodes) when is_list(Nodes) -> 
    gen_server:call(?CONTROLLER,{get_tracerdata,Nodes},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% list_logs(TracerData)={ok,NodeResults}|NodeResult|{error,Reason}
%% list_logs(NodeList)={ok,NodeResults}|{error,Reason}
%% list_logs()={ok,NodeResults}|NodeResult|{error,Reason}
%%   TracerData  see init_tracing/1/2
%%   NodeList=[NodeSpec,...]
%%     NodeSpec=Node|{Node,TracerData}
%%   NodeResults=[{Node,NodeResult},...]
%%     NodeResult={ok,FileList}|{ok,no_log}|{error,Reason}
%%       FileList=[FileType,...], one or more of different types.
%%         FileType={trace_log,Dir,Files}|{ti_log,Dir,Files}
%%         Files=[FileNameWithOutPath,...]
%%
%% Ask local or specified runtime components for now existing logs given 
%% TracerData. If TracerData is left out, the runtime components TracerData, 
%% if existing, will be used instead. 
list_logs() ->
    gen_server:call(?CONTROLLER,list_logs,?CALL_TIMEOUT).

list_logs(TracerDataOrNodesList) when list(TracerDataOrNodesList) ->
    gen_server:call(?CONTROLLER,{list_logs,TracerDataOrNodesList},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------

%% fetch_log(LogSpecList,DestDir,Prefix)={ok,NodeResults}|{error,not_distributed}|
%%     {error,Reason} 
%% fetch_log(DestDir,Prefix)={ok,NodeResults}|{error,not_distributed}|
%%     {error,Reason} 
%% fetch_log(ToNode,DestDir,Prefix)=
%% fetch_log(ToNode,LogSpecList,DestDir,Prefix)=
%%   DestDir=string(), to where the fetched files shall be placed.
%%   Prefix=string(), prefix on locally saved fetched files.
%%   LogSpecList=[LogSpec,...],
%%   LogSpec={Node,FileSpecList}|Node|{Node,TracerData} 
%%   TracerData=see init_tracing/1/2
%%   FileSpecList=[{trace_log,Dir,FileList},{ti_log,Dir,FileList}]
%%       where each tuple-item is optional.
%%   FileList=[RemoteFileName,...]
%%   ToNode=atom()
%%   NodeResult={Conclusion,ResultFileSpec}|no_log|{error,NReason}
%%     Conclusion=complete|incomplete
%%     ResultFileSpec=[{trace_log,FileResults},{ti_log,FileResults}]
%%       FileResults=[FileResult,...]
%%         FileResult={ok,FileName}|{error,FReason}
%%     NReason=own_node|Reason
%%   FReason = {file_open,{posix(),FileName}} |
%%             {file_open,{posix(),RemoteFileName}}
%%             {file_open,{posix(),[DestDir,Prefix,RemoteFileName]}}
%%             {file_write,{posix(),FileName}} |
%%             {truncated,FileName}
%%             {truncated,{Reason,FileName}}
%%   posix() - an atom which is named from the Posix error codes used in
%%             Unix, and in the runtime libraries of most C compilers.
%%             See module file in Kernel Reference manual.
%%
%% Copies logfiles over distributed erlang to ToNode. This
%% function can only be used in a distributed system.
%% The resulting transfered files will have the prefix Prefix and will be 
%% located in DestDir.
%% Note that the client process using this function will wait until all files
%% are moved. The job can be cancelled, causing any already copied files to be
%% removed, by simply terminating the waiting client process.
fetch_log(DestDir,Prefix) when list(DestDir),list(Prefix) ->
    gen_server:call(?CONTROLLER,{fetch_log,node(),all,DestDir,Prefix},infinity).

fetch_log(ToNode,DestDir,Prefix) when atom(ToNode),list(DestDir),list(Prefix) ->
    gen_server:call(?CONTROLLER,{fetch_log,ToNode,all,DestDir,Prefix},infinity);

fetch_log(LogSpecList,DestDir,Prefix) when list(LogSpecList),list(DestDir),list(Prefix) ->
    gen_server:call(?CONTROLLER,{fetch_log,node(),LogSpecList,DestDir,Prefix},infinity).

fetch_log(ToNode,LogSpecList,DestDir,Prefix)
  when atom(ToNode),list(LogSpecList),list(DestDir),list(Prefix) ->
    gen_server:call(?CONTROLLER,{fetch_log,ToNode,LogSpecList,DestDir,Prefix},infinity).
%% ------------------------------------------------------------------------------

%% delete_log(Nodes,TracerData)={ok,NodeResults}|{error,Reason}
%% delete_log(NodeSpecList)={ok,NodeResults}|{error,Reason}
%% delete_log(Spec)={ok,NodeResults}|NodeResult|{error,Reason}
%% delete_log(TracerData)={ok,NodeResults}|NodeResult|{error,Reason}
%% delete_log()={ok,NodeResults}|NodeResult|{error,Reason}
%%   Nodes=[Node,...], 
%%   NodeSpecList=[{Node,Spec},...]
%%   Spec=[AbsPathFileName,...]|LogSpecs
%%   LogSpecs=[LogSpec,...]
%%     LogSpec={trace_log,Dir,[FileNameWithoutPath,...]}|
%%             {ti_log,Dir,[FileNameWithoutPath,...]}
%%   TracerData = see init_tracing/1/2
%%   NodeResults=[{Node,NodeResult},...]
%%     NodeResult={ok,no_log}|{ok,LogInfos}|{ok,FileInfos}
%%       LogInfos=[LogInfo,...]
%%         LogInfo={trace_log,FileInfos}|{ti_log,FileInfos}
%%           FileInfos=[FileInfo,...]
%%             FileInfo={ok,FileName}|{error,Reason} whether FileName contains
%%               full path or not depends on if AbsPathFileName or LogSpec was
%%               used when specifying the files.
%%
%% Deletes listed files or files corresponding to TracerData from specified
%% or all Nodes. If no TracerData or list of files is specified in the call the 
%% TracerData at Node will be used to identify log files to delete.
delete_log() ->
    gen_server:call(?CONTROLLER,{delete_log,all},?CALL_TIMEOUT).
delete_log(What) ->
    gen_server:call(?CONTROLLER,{delete_log,What},?CALL_TIMEOUT).
delete_log(Nodes,Spec) ->
    gen_server:call(?CONTROLLER,{delete_log,Nodes,Spec},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% subscribe()= same as subscribe(self())
%% subscribe(Pid)=ok|{error,Reason}
%%   Pid=pid(),  
%%   Reason = 
%% Add Pid or self() to event sending list. Note that it is possible to add a 
%% pid several times and that the Pid then will receive several event messages.
%% All events will be sent to all subscribers in the event sending list.
%%   Event={inviso_event,ControllerPid,erlang:localtime(),Msg},
%%   Msg= 
%%     {connected, Node, {Tag, {State, Status}}}
%%     {disconnected, Node, not_applicable}
%%     {state_change, Node, {State, Status}}
%%     {port_down, Node, Reason}
%%   Node = node() | local_runtime (when running in a non-distributed 
%%                                  environment)
subscribe() ->
    gen_server:call(?CONTROLLER,{subscribe,self()},?CALL_TIMEOUT).

subscribe(Pid) ->
    gen_server:call(?CONTROLLER,{subscribe,Pid},?CALL_TIMEOUT).
%% -----------------------------------------------------------------------------

%% unsubscribe()= same as unsubscribe(self())
%% unsubscribe(Pid)=ok
%%   Pid=pid(),  
%%
%% Remove, if present, first occurrence of Pid or self() from event sending 
%% list. Note that it is not an error to remove a non existing subscription.
unsubscribe() ->
    gen_server:call(?CONTROLLER,{unsubscribe,self()},?CALL_TIMEOUT).

unsubscribe(Pid) ->
    gen_server:call(?CONTROLLER,{unsubscribe,Pid},?CALL_TIMEOUT).
%% ------------------------------------------------------------------------------



%% debuging the controller
%% ----------------------------------------------------------------------------
state() ->
    ?CONTROLLER ! state.

%% debuging the runtime component
state(Node) ->
    ?CONTROLLER ! {state, Node}.

%%% end of file