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yap-6.3/pl/debug.yap
2013-12-13 08:42:57 +00:00

962 lines
28 KiB
Prolog

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: debug.pl *
* Last rev: *
* mods: *
* comments: YAP debugger *
* *
*************************************************************************/
/*-----------------------------------------------------------------------------
Debugging / creating spy points
-----------------------------------------------------------------------------*/
:- op(900,fx,[spy,nospy]).
'$init_debugger' :-
'$nb_getval'('$trace', _, fail), !.
'$init_debugger' :-
nb_setval('$trace',off),
nb_setval('$if_skip_mode',no_skip),
nb_setval('$spy_glist',[]),
nb_setval('$spy_gn',1),
nb_setval('$debug_run',off),
nb_setval('$debug_jump',false).
% First part : setting and reseting spy points
% $suspy does most of the work
'$suspy'(V,S,M) :- var(V) , !,
'$do_error'(instantiation_error,M:spy(V,S)).
'$suspy'((M:S),P,_) :- !,
'$suspy'(S,P,M).
'$suspy'([],_,_) :- !.
'$suspy'([F|L],S,M) :- !, ( '$suspy'(F,S,M) ; '$suspy'(L,S,M) ).
'$suspy'(F/N,S,M) :- !,
functor(T,F,N),
'$do_suspy'(S, F, N, T, M).
'$suspy'(A,S,M) :- atom(A), !,
'$suspy_predicates_by_name'(A,S,M).
'$suspy'(P,spy,M) :- !,
'$do_error'(domain_error(predicate_spec,P),spy(M:P)).
'$suspy'(P,nospy,M) :-
'$do_error'(domain_error(predicate_spec,P),nospy(M:P)).
'$suspy_predicates_by_name'(A,S,M) :-
% just check one such predicate exists
(
current_predicate(A,M:_)
->
M = EM,
A = NA
;
recorded('$import','$import'(EM,M,GA,_,A,_),_),
functor(GA,NA,_)
),
!,
'$do_suspy_predicates_by_name'(NA,S,EM).
'$suspy_predicates_by_name'(A,spy,M) :- !,
print_message(warning,no_match(spy(M:A))).
'$suspy_predicates_by_name'(A,nospy,M) :-
print_message(warning,no_match(nospy(M:A))).
'$do_suspy_predicates_by_name'(A,S,M) :-
current_predicate(A,M:T),
functor(T,A,N),
'$do_suspy'(S, A, N, T, M).
'$do_suspy_predicates_by_name'(A, S, M) :-
recorded('$import','$import'(EM,M,T0,_,A,N),_),
functor(T0,A0,N0),
'$do_suspy'(S, A0, N0, T, EM).
%
% protect against evil arguments.
%
'$do_suspy'(S, F, N, T, M) :-
recorded('$import','$import'(EM,M,T0,_,F,N),_), !,
functor(T0, F0, N0),
'$do_suspy'(S, F0, N0, T, EM).
'$do_suspy'(S, F, N, T, M) :-
'$undefined'(T,M), !,
( S = spy ->
print_message(warning,no_match(spy(M:F/N)))
;
print_message(warning,no_match(nospy(M:F/N)))
).
'$do_suspy'(S, F, N, T, M) :-
'$system_predicate'(T,M),
'$flags'(T,M,F,F),
F /\ 0x118dd080 =\= 0,
( S = spy ->
'$do_error'(permission_error(access,private_procedure,T),spy(M:F/N))
;
'$do_error'(permission_error(access,private_procedure,T),nospy(M:F/N))
).
'$do_suspy'(S, F, N, T, M) :-
'$undefined'(T,M), !,
( S = spy ->
print_message(warning,no_match(spy(M:F/N)))
;
print_message(warning,no_match(nospy(M:F/N)))
).
'$do_suspy'(S,F,N,T,M) :-
'$suspy2'(S,F,N,T,M).
'$suspy2'(spy,F,N,T,M) :-
recorded('$spy','$spy'(T,M),_), !,
print_message(informational,breakp(bp(debugger,plain,M:T,M:F/N,N),add,already)).
'$suspy2'(spy,F,N,T,M) :- !,
recorda('$spy','$spy'(T,M),_),
'$set_spy'(T,M),
print_message(informational,breakp(bp(debugger,plain,M:T,M:F/N,N),add,ok)).
'$suspy2'(nospy,F,N,T,M) :-
recorded('$spy','$spy'(T,M),R), !,
erase(R),
'$rm_spy'(T,M),
print_message(informational,breakp(bp(debugger,plain,M:T,M:F/N,N),remove,last)).
'$suspy2'(nospy,F,N,_,M) :-
print_message(informational,breakp(no,breakpoint_for,M:F/N)).
'$pred_being_spied'(G, M) :-
recorded('$spy','$spy'(G,M),_), !.
spy Spec :-
'$init_debugger',
prolog:debug_action_hook(spy(Spec)), !.
spy L :-
'$current_module'(M),
'$suspy'(L, spy, M), fail.
spy _ :- debug.
nospy Spec :-
'$init_debugger',
prolog:debug_action_hook(nospy(Spec)), !.
nospy L :-
'$current_module'(M),
'$suspy'(L, nospy, M), fail.
nospy _.
nospyall :-
'$init_debugger',
prolog:debug_action_hook(nospyall), !.
nospyall :-
recorded('$spy','$spy'(T,M),_), functor(T,F,N), '$suspy'(F/N,nospy,M), fail.
nospyall.
% debug mode -> debug flag = 1
debug :-
'$init_debugger',
( nb_getval('$spy_gn',L) -> true ; nb_setval('$spy_gn',1) ),
'$start_debugging'(on),
print_message(informational,debug(debug)).
'$start_debugging'(Mode) :-
(Mode == on ->
'$swi_set_prolog_flag'(debug, true)
;
'$swi_set_prolog_flag'(debug, false)
),
nb_setval('$debug_run',off),
nb_setval('$debug_jump',false).
nodebug :-
'$init_debugger',
'$swi_set_prolog_flag'(debug, false),
nb_setval('$trace',off),
print_message(informational,debug(off)).
%
% remove any debugging info after an abort.
%
trace :-
'$init_debugger',
'$nb_getval'('$trace', on, fail), !.
trace :-
nb_setval('$trace',on),
'$start_debugging'(on),
print_message(informational,debug(trace)),
'$creep'.
notrace :-
'$init_debugger',
nodebug.
/*-----------------------------------------------------------------------------
leash
-----------------------------------------------------------------------------*/
leash(X) :- var(X),
'$do_error'(instantiation_error,leash(X)).
leash(X) :-
'$init_debugger',
'$leashcode'(X,Code),
set_value('$leash',Code),
'$show_leash'(informational,Code), !.
leash(X) :-
'$do_error'(type_error(leash_mode,X),leash(X)).
'$show_leash'(Msg,0) :-
print_message(Msg,leash([])).
'$show_leash'(Msg,Code) :-
'$check_leash_bit'(Code,0x8,L3,call,LF),
'$check_leash_bit'(Code,0x4,L2,exit,L3),
'$check_leash_bit'(Code,0x2,L1,redo,L2),
'$check_leash_bit'(Code,0x1,[],fail,L1),
print_message(Msg,leash(LF)).
'$check_leash_bit'(Code,Bit,L0,_,L0) :- Bit /\ Code =:= 0, !.
'$check_leash_bit'(_,_,L0,Name,[Name|L0]).
'$leashcode'(full,0xf) :- !.
'$leashcode'(on,0xf) :- !.
'$leashcode'(half,0xb) :- !.
'$leashcode'(loose,0x8) :- !.
'$leashcode'(off,0x0) :- !.
'$leashcode'(none,0x0) :- !.
%'$leashcode'([L|M],Code) :- !, '$leashcode_list'([L|M],Code).
'$leashcode'([L|M],Code) :- !,
'$list2Code'([L|M],Code).
'$leashcode'(N,N) :- integer(N), N >= 0, N =< 0xf.
'$list2Code'(V,_) :- var(V), !,
'$do_error'(instantiation_error,leash(V)).
'$list2Code'([],0) :- !.
'$list2Code'([V|L],_) :- var(V), !,
'$do_error'(instantiation_error,leash([V|L])).
'$list2Code'([call|L],N) :- '$list2Code'(L,N1), N is 0x8 + N1.
'$list2Code'([exit|L],N) :- '$list2Code'(L,N1), N is 0x4 + N1.
'$list2Code'([redo|L],N) :- '$list2Code'(L,N1), N is 0x2 + N1.
'$list2Code'([fail|L],N) :- '$list2Code'(L,N1), N is 0x1 + N1.
/*-----------------------------------------------------------------------------
debugging
-----------------------------------------------------------------------------*/
debugging :-
'$init_debugger',
prolog:debug_action_hook(nospyall), !.
debugging :-
( '$swi_current_prolog_flag'(debug, true) ->
print_message(help,debug(debug))
;
print_message(help,debug(off))
),
findall(M:(N/A),(recorded('$spy','$spy'(T,M),_),functor(T,N,A)),L),
print_message(help,breakpoints(L)),
get_value('$leash',Leash),
'$show_leash'(help,Leash).
/*-----------------------------------------------------------------------------
spy
-----------------------------------------------------------------------------*/
% ok, I may have a spy point for this goal, or not.
% if I do, I should check what mode I am in.
% Goal/Mode Have Spy Not Spied
% Creep Stop Stop
% Leap Stop Create CP
% Skip Create CP Create CP
% FastLeap Stop Ignore
% FastIgnore Ignore Ignore
% flag description initial possible values
% spy_gn goal number 1 1...
% spy_trace trace 0 0, 1
% spy_skip leap off Num (stop level)
% debug_prompt stop at spy points on on,off
% a flip-flop is also used
% when 1 spying is enabled *(the same as spy stop).
%'$spy'(G) :- write(user_error,'$spy'(G)), nl, fail.
%
% handle suspended goals
% take care with hidden goals.
%
% $spy may be called from user code, so be careful.
'$spy'([Mod|G]) :-
'$swi_current_prolog_flag'(debug, false), !,
'$execute_nonstop'(G,Mod).
'$spy'([Mod|G]) :-
CP is '$last_choice_pt',
'$do_spy'(G, Mod, CP, spy).
% last argument to do_spy says that we are at the end of a context. It
% is required to know whether we are controlled by the debugger.
%'$do_spy'(V, M, CP, Flag) :-
% writeln('$do_spy'(V, M, CP, Flag)), fail.
'$do_spy'(V, M, CP, Flag) :-
var(V), !,
'$do_spy'(call(V), M, CP, Flag).
'$do_spy'(!, _, CP, _) :-
!, '$$cut_by'(CP).
'$do_spy'('$cut_by'(M), _, _, _) :-
!, '$$cut_by'(M).
'$do_spy'(true, _, _, _) :- !.
%'$do_spy'(fail, _, _, _) :- !, fail.
'$do_spy'(M:G, _, CP, CalledFromDebugger) :- !,
'$do_spy'(G, M, CP, CalledFromDebugger).
'$do_spy'((A,B), M, CP, CalledFromDebugger) :- !,
'$do_spy'(A, M, CP, debugger),
'$do_spy'(B, M, CP, CalledFromDebugger).
'$do_spy'((T->A;B), M, CP, CalledFromDebugger) :- !,
( '$do_spy'(T, M, CP, debugger) -> '$do_spy'(A, M, CP, CalledFromDebugger)
;
'$do_spy'(B, M, CP, CalledFromDebugger)
).
'$do_spy'((T->A|B), M, CP, CalledFromDebugger) :- !,
( '$do_spy'(T, M, CP, debugger) -> '$do_spy'(A, M, CP, CalledFromDebugger)
;
'$do_spy'(B, M, CP, CalledFromDebugger)
).
'$do_spy'((T->A), M, CP, CalledFromDebugger) :- !,
( '$do_spy'(T, M, CP, debugger) -> '$do_spy'(A, M, CP, CalledFromDebugger) ).
'$do_spy'((A;B), M, CP, CalledFromDebugger) :- !,
(
'$do_spy'(A, M, CP, CalledFromDebugger)
;
'$do_spy'(B, M, CP, CalledFromDebugger)
).
'$do_spy'((A|B), M, CP, CalledFromDebugger) :- !,
(
'$do_spy'(A, M, CP, CalledFromDebugger)
;
'$do_spy'(B, M, CP, CalledFromDebugger)
).
'$do_spy'((\+G), M, CP, CalledFromDebugger) :- !,
\+ '$do_spy'(G, M, CP, CalledFromDebugger).
'$do_spy'((not(G)), M, CP, CalledFromDebugger) :- !,
\+ '$do_spy'(G, M, CP, CalledFromDebugger).
'$do_spy'(G, Module, _, CalledFromDebugger) :-
nb_getval('$spy_gn',L), /* get goal no. */
L1 is L+1, /* bump it */
nb_setval('$spy_gn',L1), /* and save it globaly */
b_getval('$spy_glist',History), /* get goal list */
b_setval('$spy_glist',[info(L,Module,G,_Retry,_Det,_HasFoundAnswers)|History]), /* and update it */
'$loop_spy'(L, G, Module, CalledFromDebugger).
% we are skipping, so we can just call the goal,
% while leaving the minimal structure in place.
'$loop_spy'(GoalNumber, G, Module, CalledFromDebugger) :-
'$current_choice_point'(CP),
'$system_catch'('$loop_spy2'(GoalNumber, G, Module, CalledFromDebugger, CP),
Module, error(Event,Context),
'$loop_spy_event'(error(Event,Context), GoalNumber, G, Module, CalledFromDebugger)).
% handle weird things happening in the debugger.
'$loop_spy_event'('$pass'(Event), _, _, _, _) :- !,
throw(Event).
'$loop_spy_event'(error('$retry_spy'(G0),_), GoalNumber, G, Module, CalledFromDebugger) :-
G0 >= GoalNumber, !,
'$loop_spy'(GoalNumber, G, Module, CalledFromDebugger).
'$loop_spy_event'(error('$retry_spy'(GoalNumber),_), _, _, _, _) :- !,
throw(error('$retry_spy'(GoalNumber),[])).
'$loop_spy_event'(error('$fail_spy'(G0),_), GoalNumber, G, Module, CalledFromDebugger) :-
G0 >= GoalNumber, !,
'$loop_fail'(GoalNumber, G, Module, CalledFromDebugger).
'$loop_spy_event'(error('$fail_spy'(GoalNumber),_), _, _, _, _) :- !,
throw(error('$fail_spy'(GoalNumber),[])).
'$loop_spy_event'(error('$done_spy'(G0),_), GoalNumber, G, _, CalledFromDebugger) :-
G0 >= GoalNumber, !,
'$continue_debugging'(zip, CalledFromDebugger).
'$loop_spy_event'(error('$done_spy'(GoalNumber),_), _, _, _, _) :- !,
throw(error('$done_spy'(GoalNumber),[])).
'$loop_spy_event'(Event, GoalNumber, G, Module, CalledFromDebugger) :-
'$debug_error'(Event),
'$system_catch'(
('$trace'(exception(Event),G,Module,GoalNumber,_),fail),
Module,
error(NewEvent,NewContext),
'$loop_spy_event'(error(NewEvent,NewContext), GoalNumber, G, Module, CalledFromDebugger)
).
'$debug_error'(Event) :-
'$Error'(Event), fail.
'$debug_error'(_).
% just fail here, don't really need to call debugger, the user knows what he
% wants to do
'$loop_fail'(_GoalNumber, _G, _Module, CalledFromDebugger) :-
'$continue_debugging'(fail, CalledFromDebugger),
fail.
% if we are in
'$loop_spy2'(GoalNumber, G0, Module, CalledFromDebugger, CP) :-
/* the following choice point is where the predicate is called */
(
'$is_metapredicate'(G0, Module)
->
'$meta_expansion'(G0,Module,Module,Module,G,[])
;
G = G0
),
b_getval('$spy_glist',[Info|_]), /* get goal list */
Info = info(_,_,_,Retry,Det,false),
(
/* call port */
'$enter_goal'(GoalNumber, G, Module),
'$spycall'(G, Module, CalledFromDebugger, Retry),
% make sure we are in system mode when running the debugger.
(
'$debugger_deterministic_goal'(G) ->
Det=true
;
Det=false
),
/* go execute the continuation */
(
/* exit port */
Retry = false,
/* found an answer, so it can redo */
nb_setarg(6, Info, true),
'$show_trace'(exit,G,Module,GoalNumber,Det), /* output message at exit */
/* exit port */
/* get rid of deterministic computations */
(
Det == true
->
'$$cut_by'(CP)
;
true
),
'$continue_debugging'(exit, CalledFromDebugger)
;
% make sure we are in system mode when running the debugger.
/* backtracking from exit */
/* we get here when we want to redo a goal */
/* redo port */
(
arg(6, Info, true)
->
'$show_trace'(redo,G,Module,GoalNumber,_), /* inform user_error */
nb_setarg(6, Info, false)
;
true
),
'$continue_debugging'(fail, CalledFromDebugger),
fail /* to backtrack to spycalls */
)
;
'$show_trace'(fail,G,Module,GoalNumber,_), /* inform at fail port */
'$continue_debugging'(fail, CalledFromDebugger),
/* fail port */
fail
).
'$enter_goal'(GoalNumber, G, Module) :-
'$zip'(GoalNumber, G, Module), !.
'$enter_goal'(GoalNumber, G, Module) :-
'$trace'(call, G, Module, GoalNumber, _).
'$show_trace'(_, G, Module, GoalNumber,_) :-
'$zip'(GoalNumber, G, Module), !.
'$show_trace'(P,G,Module,GoalNumber,Deterministic) :-
'$trace'(P,G,Module,GoalNumber,Deterministic).
%
% skip a goal or a port
%
'$zip'(GoalNumber, G, Module) :-
nb_getval('$debug_run',StopPoint),
% zip mode off, we cannot zip
StopPoint \= off,
(
% skip spy points (eg, s).
StopPoint == spy
->
\+ '$pred_being_spied'(G, Module)
;
% skip goals (eg, l).
number(StopPoint)
->
StopPoint < GoalNumber
).
%
'$spycall'(G, M, _, _) :-
nb_getval('$debug_jump',true),
!,
'$execute_nonstop'(G,M).
'$spycall'(G, M, _, _) :-
(
'$system_predicate'(G,M)
;
'$system_module'(M)
),
!,
(
'$is_metapredicate'(G,M)
->
'$creep'(G,M)
;
'$execute'(M:G)
).
'$spycall'(G, M, _, _) :-
'$tabled_predicate'(G,M),
!,
'$continue_debugging_goal'(no, '$execute_nonstop'(G,M)).
'$spycall'(G, M, CalledFromDebugger, InRedo) :-
'$flags'(G,M,F,F),
F /\ 0x08402000 =\= 0, !, % dynamic procedure, logical semantics, or source
% use the interpreter
CP is '$last_choice_pt',
'$clause'(G, M, Cl, _),
% I may backtrack to here from far away
( '$do_spy'(Cl, M, CP, debugger) ; InRedo = true ).
'$spycall'(G, M, CalledFromDebugger, InRedo) :-
'$undefined'(G, M), !,
'$find_goal_definition'(M, G, NM, Goal),
'$spycall'(Goal, NM, CalledFromDebugger, InRedo).
'$spycall'(G, M, _, InRedo) :-
% I lost control here.
CP is '$last_choice_pt',
'$static_clause'(G,M,_,R),
% I may backtrack to here from far away
(
'$continue_debugging_goal'(no, '$execute_clause'(G, M, R, CP))
;
InRedo = true
).
%
% execute a built-in in creep mode
%
'$creep'(G,M) :-
(
'$$save_by'(CP1),
'$creep',
'$execute_nonstop'(G,M),
'$$save_by'(CP2),
(CP1 == CP2 -> ! ; ( true ; '$creep', fail ) ),
'$stop_creeping'
;
fail
).
'$tabled_predicate'(G,M) :-
'$flags'(G,M,F,F),
F /\ 0x00000040 =\= 0.
%'$trace'(P,G,Module,L,Deterministic) :-
% '$nb_getval'('$system_mode',On,fail), writeln(On), fail.
'$trace'(P,G,Module,L,Deterministic) :-
% at this point we are done with leap or skip
nb_setval('$debug_run',off),
% make sure we run this code outside debugging mode.
'$swi_set_prolog_flag'(debug, false),
repeat,
'$trace_msg'(P,G,Module,L,Deterministic),
(
'$unleashed'(P) ->
'$action'(10,P,L,G,Module,Debug),
put_code(user_error, 10)
;
write(user_error,' ? '), get0(user_input,C),
'$action'(C,P,L,G,Module,Debug)
),
(Debug = on
->
'$swi_set_prolog_flag'(debug, true)
;
Debug = zip
->
'$swi_set_prolog_flag'(debug, true)
;
'$swi_set_prolog_flag'(debug, false)
),
!.
'$trace_msg'(P,G,Module,L,Deterministic) :-
flush_output(user_output),
flush_output(user_error),
functor(P,P0,_),
(P = exit, Deterministic \= true -> Det = '?' ; Det = ' '),
('$pred_being_spied'(G,Module) -> CSPY = '*' ; CSPY = ' '),
% vsc: fix this
% ( SL = L -> SLL = '>' ; SLL = ' '),
SLL = ' ',
( Module\=prolog,
Module\=user
->
GW = Module:G
;
GW = G
),
format(user_error,'~a~a~a (~d) ~q:',[Det,CSPY,SLL,L,P0]),
'$debugger_write'(user_error,GW).
'$unleashed'(call) :- get_value('$leash',L), L /\ 2'1000 =:= 0. %'
'$unleashed'(exit) :- get_value('$leash',L), L /\ 2'0100 =:= 0. %'
'$unleashed'(redo) :- get_value('$leash',L), L /\ 2'0010 =:= 0. %'
'$unleashed'(fail) :- get_value('$leash',L), L /\ 2'0001 =:= 0. %'
% the same as fail.
'$unleashed'(exception(_)) :- get_value('$leash',L), L /\ 2'0001 =:= 0. %'
'$debugger_write'(Stream, G) :-
recorded('$print_options','$debugger'(OUT),_), !,
write_term(Stream, G, OUT).
'$debugger_write'(Stream, G) :-
writeq(Stream, G).
'$action'(13,P,CallNumber,G,Module,Zip) :- !, % newline creep
get0(user_input,C),
'$action'(C,P,CallNumber,G,Module,Zip).
'$action'(10,_,_,_,_,on) :- !, % newline creep
nb_setval('$debug_jump',false).
'$action'(0'!,_,_,_,_,_) :- !, % ! 'g execute
read(user,G),
% don't allow yourself to be caught by creep.
'$swi_current_prolog_flag'(debug, OldDeb),
'$swi_set_prolog_flag'(debug, false),
( '$execute'(G) -> true ; true),
'$swi_set_prolog_flag'(debug, OldDeb),
% '$skipeol'(0'!), % '
fail.
'$action'(0'<,_,_,_,_,_) :- !, % <'Depth
'$new_deb_depth',
'$skipeol'(0'<),
fail.
'$action'(0'^,_,_,G,_,_) :- !, % '
'$print_deb_sterm'(G),
'$skipeol'(0'^),
fail.
'$action'(0'a,_,_,_,_,off) :- !, % 'a abort
'$skipeol'(0'a),
abort.
'$action'(0'b,_,_,_,_,_) :- !, % 'b break
'$skipeol'(0'b),
break,
fail.
'$action'(0'A,_,_,_,_,_) :- !, % 'b break
'$skipeol'(0'A),
'$stack_dump',
fail.
'$action'(0'c,_,_,_,_,on) :- !, % 'c creep
'$skipeol'(0'c),
nb_setval('$debug_jump',false).
'$action'(0'e,_,_,_,_,_) :- !, % 'e exit
'$skipeol'(0'e),
halt.
'$action'(0'f,_,CallId,_,_,_) :- !, % 'f fail
'$scan_number'(0'f, CallId, GoalId), %'f
throw(error('$fail_spy'(GoalId),[])).
'$action'(0'h,_,_,_,_,_) :- !, % 'h help
'$action_help',
'$skipeol'(104),
fail.
'$action'(0'?,_,_,_,_,_) :- !, % '? help
'$action_help',
'$skipeol'(104),
fail.
'$action'(0'p,_,_,G,Module,_) :- !, % 'p print
((Module = prolog ; Module = user) ->
print(user_error,G), nl(user_error)
;
print(user_error,Module:G), nl(user_error)
),
'$skipeol'(0'p),
fail.
'$action'(0'd,_,_,G,Module,_) :- !, % 'd display
((Module = prolog ; Module = user) ->
display(user_error,G), nl(user_error)
;
display(user_error,Module:G), nl(user_error)
),
'$skipeol'(0'd),
fail.
'$action'(0'l,_,_,_,_,on) :- !, % 'l leap
'$skipeol'(0'l),
nb_setval('$debug_run',spy),
nb_setval('$debug_jump',false).
'$action'(0'z,_,_,_,_,zip) :- !, % 'z zip, fast leap
'$skipeol'(0'z), % 'z
nb_setval('$debug_run',spy),
nb_setval('$debug_jump',true).
% skip first call (for current goal),
% stop next time.
'$action'(0'k,_,_,_,_,zip) :- !, % 'k zip, fast leap
'$skipeol'(0'k), % '
nb_setval('$debug_run',spy),
nb_setval('$debug_jump',true).
% skip first call (for current goal),
% stop next time.
'$action'(0'n,_,_,_,_,off) :- !, % 'n nodebug
'$skipeol'(0'n), % '
% tell debugger never to stop.
nb_setval('$debug_run', -1),
nb_setval('$debug_jump',true),
nodebug.
'$action'(0'r,_,CallId,_,_,_) :- !, % 'r retry
'$scan_number'(0'r,CallId,ScanNumber), % '
'$swi_set_prolog_flag'(debug, true),
throw(error('$retry_spy'(ScanNumber),[])).
'$action'(0's,P,CallNumber,_,_,on) :- !, % 's skip
'$skipeol'(0's), % '
( (P=call; P=redo) ->
nb_setval('$debug_run',CallNumber),
nb_setval('$debug_jump',false)
;
'$ilgl'(0's) % '
).
'$action'(0't,P,CallNumber,_,_,zip) :- !, % 't fast skip
'$skipeol'(0't), % '
( (P=call; P=redo) ->
nb_setval('$debug_run',CallNumber),
nb_setval('$debug_jump',true)
;
'$ilgl'(0't) % '
).
'$action'(0'+,_,_,G,M,_) :- !, % '+ spy this
functor(G,F,N), spy(M:(F/N)),
'$skipeol'(0'+), % '
fail.
'$action'(0'-,_,_,G,M,_) :- !, % '- nospy this
functor(G,F,N), nospy(M:(F/N)),
'$skipeol'(0'-), % '
fail.
'$action'(0'g,_,_,_,_,_) :- !, % 'g ancestors
'$scan_number'(0'g,-1,HowMany), % '
'$show_ancestors'(HowMany),
fail.
'$action'(C,_,_,_,_,_) :-
'$skipeol'(C),
'$ilgl'(C),
fail.
% first argument is exit, zip or fail
% second is creep, meta_creep, spy, or debugger
%'$continue_debugging'(Exit, Debugger) :-
% writeln('$continue_debugging'(Exit, Debugger)), fail.
% that's what follows
'$continue_debugging'(_, debugger) :- !.
% do not need to debug!
% go back to original sequence.
'$continue_debugging'(zip, _) :- !.
'$continue_debugging'(_, creep) :- !,
'$creep'.
'$continue_debugging'(fail, _) :- !.
'$continue_debugging'(_, _).
% if we are in the interpreter, don't need to care about forcing a trace, do we?
'$continue_debugging_goal'(yes,G) :- !,
'$execute_dgoal'(G).
% do not need to debug!
'$continue_debugging_goal'(_,G) :-
'nb_getval'('$debug_run',Zip),
(Zip == nodebug ; number(Zip) ; Zip == spy ), !,
'$execute_dgoal'(G).
'$continue_debugging_goal'(_,G) :-
'$execute_creep_dgoal'(G).
'$execute_dgoal'('$execute_nonstop'(G,M)) :-
'$execute_nonstop'(G,M).
'$execute_dgoal'('$execute_clause'(G, M, R, CP)) :-
'$execute_clause'(G, M, R, CP).
'$execute_creep_dgoal'('$execute_nonstop'(G,M)) :-
'$creep',
'$execute_nonstop'(G,M).
'$execute_creep_dgoal'('$execute_clause'(G, M, R, CP)) :-
'$creep',
'$execute_clause'(G, M, R, CP).
'$show_ancestors'(HowMany) :-
b_getval('$spy_glist',[_|History]),
(
History == []
->
print_message(help, ancestors([]))
;
'$show_ancestors'(History,HowMany),
nl(user_error)
).
'$show_ancestors'([],_).
'$show_ancestors'([_|_],0) :- !.
'$show_ancestors'([info(L,M,G,Retry,Det,_Exited)|History],HowMany) :-
'$show_ancestor'(L,M,G,Retry,Det,HowMany,HowMany1),
'$show_ancestors'(History,HowMany1).
% skip exit port, we're looking at true ancestors
'$show_ancestor'(_,_,_,_,Det,HowMany,HowMany) :-
nonvar(Det), !.
% look at retry
'$show_ancestor'(GoalNumber, M, G, Retry, _, HowMany, HowMany1) :-
nonvar(Retry), !,
HowMany1 is HowMany-1,
'$trace_msg'(redo, G, M, GoalNumber, _), nl(user_error).
'$show_ancestor'(GoalNumber, M, G, _, _, HowMany, HowMany1) :-
HowMany1 is HowMany-1,
'$trace_msg'(call, G, M, GoalNumber, _), nl(user_error).
'$action_help' :-
format(user_error,'newline creep a abort~n', []),
format(user_error,'c creep e exit~n', []),
format(user_error,'f Goal fail h help~n', []),
format(user_error,'l leap r Goal retry~n', []),
format(user_error,'s skip t fastskip~n', []),
format(user_error,'q quasiskip k quasileap~n', []),
format(user_error,'b break n no debug~n', []),
format(user_error,'p print d display~n', []),
format(user_error,'<D depth D < full term~n', []),
format(user_error,'+ spy this - nospy this~n', []),
format(user_error,'^ view subg ^^ view using~n', []),
format(user_error,'A choices g [N] ancestors~n', []),
format(user_error,'! g execute goal~n', []).
'$ilgl'(C) :-
print_message(warning, trace_command(C)),
print_message(help, trace_help),
fail.
'$skipeol'(10) :- !.
'$skipeol'(_) :- get0(user,C), '$skipeol'(C).
'$scan_number'(_, _, Nb) :-
get0(user,C),
'$scan_number2'(C, Nb), !.
'$scan_number'(_, CallId, CallId).
'$scan_number2'(10, _) :- !, fail.
'$scan_number2'(0' , Nb) :- !, % '
get0(user,C),
'$scan_number2'(C , Nb).
'$scan_number2'(0' , Nb) :- !, %'
get0(user,C),
'$scan_number2'(C, Nb).
'$scan_number2'(C, Nb) :-
'$scan_number3'(C, 0, Nb).
'$scan_number3'(10, Nb, Nb) :- !, Nb > 0.
'$scan_number3'( C, Nb0, Nb) :-
C >= "0", C =< "9",
NbI is Nb0*10+(C-"0"),
get0(user, NC),
'$scan_number3'( NC, NbI, Nb).
'$print_deb_sterm'(G) :-
'$get_sterm_list'(L), !,
'$deb_get_sterm_in_g'(L,G,A),
recorda('$debug_sub_skel',L,_),
format(user_error,'~n~w~n~n',[A]).
'$print_deb_sterm'(_) :- '$skipeol'(94).
'$get_sterm_list'(L) :-
get0(user_input,C),
'$deb_inc_in_sterm_oldie'(C,L0,CN),
'$get_sterm_list'(L0,CN,0,L).
'$deb_inc_in_sterm_oldie'(94,L0,CN) :- !,
get0(user_input,CN),
( recorded('$debug_sub_skel',L0,_) -> true ;
CN = [] ).
'$deb_inc_in_sterm_oldie'(C,[],C).
'$get_sterm_list'(L0,C,N,L) :-
( C =:= "^", N =\= 0 -> get0(CN),
'$get_sterm_list'([N|L0],CN,0,L) ;
C >= "0", C =< "9" -> NN is 10*N+C-"0", get0(CN),
'$get_sterm_list'(L0,CN,NN,L);
C =:= 10 -> (N =:= 0 -> L = L0 ; L=[N|L0]) ).
'$deb_get_sterm_in_g'([],G,G).
'$deb_get_sterm_in_g'([H|T],G,A) :-
'$deb_get_sterm_in_g'(T,G,A1),
arg(H,A1,A).
'$new_deb_depth' :-
get0(user_input,C),
'$get_deb_depth'(C,D),
'$set_deb_depth'(D).
'$get_deb_depth'(10,10) :- !. % default depth is 0
'$get_deb_depth'(C,XF) :-
'$get_deb_depth_char_by_char'(C,0,XF).
'$get_deb_depth_char_by_char'(10,X,X) :- !.
'$get_deb_depth_char_by_char'(C,X0,XF) :-
C >= "0", C =< "9", !,
XI is X0*10+C-"0",
get0(user_input,NC),
'$get_deb_depth_char_by_char'(NC,XI,XF).
% reset when given garbage.
'$get_deb_depth_char_by_char'(C,_,10) :- '$skipeol'(C).
'$set_deb_depth'(D) :-
recorded('$print_options','$debugger'(L),R), !,
'$delete_if_there'(L, max_depth(_), LN),
erase(R),
recorda('$print_options','$debugger'([max_depth(D)|LN]),_).
'$set_deb_depth'(D) :-
recorda('$print_options','$debugger'([quoted(true),numbervars(true),portrayed(true),max_depth(D)]),_).
'$delete_if_there'([], _, []).
'$delete_if_there'([T|L], T, LN) :- !,
'$delete_if_there'(L, T, LN).
'$delete_if_there'([Q|L], T, [Q|LN]) :-
'$delete_if_there'(L, T, LN).
'$debugger_deterministic_goal'(G) :-
yap_hacks:current_choicepoints(CPs0),
% $cps(CPs0),
'$debugger_skip_traces'(CPs0,CPs1),
'$debugger_skip_loop_spy2'(CPs1,CPs2),
'$debugger_skip_spycall'(CPs2,CPs3),
'$debugger_skip_loop_spy2'(CPs3,[Catch|_]),
yap_hacks:choicepoint(Catch,_,prolog,'$catch',3,'$catch'(_,'$loop_spy_event'(_,_,G,_,_),_),_).
'$cps'([CP|CPs]) :-
yap_hacks:choicepoint(CP,A,B,C,D,E,F),
write(A:B:C:D:E:F),nl,
'$cps'(CPs).
'$cps'([]).
'$debugger_skip_spycall'([CP|CPs],CPs1) :-
yap_hacks:choicepoint(CP,_,prolog,'$spycall',4,(_;_),_), !,
'$debugger_skip_spycall'(CPs,CPs1).
'$debugger_skip_spycall'(CPs,CPs).
'$debugger_skip_traces'([CP|CPs],CPs1) :-
yap_hacks:choicepoint(CP,_,prolog,'$trace',4,(_;_),_), !,
'$debugger_skip_traces'(CPs,CPs1).
'$debugger_skip_traces'(CPs,CPs).
'$debugger_skip_loop_spy2'([CP|CPs],CPs1) :-
yap_hacks:choicepoint(CP,_,prolog,'$loop_spy2',5,(_;_),_), !,
'$debugger_skip_loop_spy2'(CPs,CPs1).
'$debugger_skip_loop_spy2'(CPs,CPs).