/************************************************************************* * * * YAP Prolog * * * * Yap Prolog was developed at NCCUP - Universidade do Porto * * * * Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 * * * ************************************************************************** * * * File: utilities for messing around in YAP internals. * * comments: error messages for YAP * * * * Last rev: $Date: 2008-03-24 23:48:47 $,$Author: vsc $ * * * * * *************************************************************************/ :- module('$hacks', [display_stack_info/4, display_stack_info/6, display_pc/3, code_location/3]). display_stack_info(CPs,Envs,Lim,PC) :- display_stack_info(CPs,Envs,Lim,CP,Lines,[]), flush_output(user_output), flush_output(user_error), print_message_lines(user_error, '', Lines). code_location(Info,Where,Location) :- integer(Where) , !, '$pred_for_code'(Where,Name,Arity,Mod,Clause), construct_code(Clause,Name,Arity,Mod,Info,Location). code_location(Info,_,Info). construct_code(-1,Name,Arity,Mod,Where,Location) :- !, number_codes(Arity,ArityCode), atom_codes(ArityAtom,ArityCode), atom_concat([Where,' at ',Mod,':',Name,'/',ArityAtom,' at indexing code'],Location). construct_code(0,_,_,_,Location,Location) :- !. construct_code(Cl,Name,Arity,Mod,Where,Location) :- number_codes(Arity,ArityCode), atom_codes(ArityAtom,ArityCode), number_codes(Cl,ClCode), atom_codes(ClAtom,ClCode), atom_concat([Where,' at ',Mod,':',Name,'/',ArityAtom,' (clause ',ClAtom,')'],Location). '$prepare_loc'(Info,Where,Location) :- integer(Where), !, '$pred_for_code'(Where,Name,Arity,Mod,Clause), '$construct_code'(Clause,Name,Arity,Mod,Info,Location). '$prepare_loc'(Info,_,Info). display_pc(PC) --> { integer(PC) }, { '$pred_for_code'(PC,Name,Arity,Mod,Clause) }, pc_code(Clause,Name,Arity,Mod). pc_code(-1,Name,Arity,Mod) --> !, [ ' indexing code of ~a:~q/~d' - [Mod,Name,Arity] ]. pc_code(Cl,Name,Arity,Mod) --> { Cl > 0 }, [ ' clause ~d of ~a:~q/~d' - [Cl,Mod,Name,Arity] ]. display_stack_info(_,_,0,_) --> !. display_stack_info([],[],_,_) --> []. display_stack_info([CP|CPs],[],I,_) --> show_lone_cp(CP), { I1 is I-1 }, display_stack_info(CPs,[],I1,_). display_stack_info([],[Env|Envs],I,Cont) --> show_env(Env, Cont, NCont), { I1 is I-1 }, display_stack_info([], Envs, I1, NCont). display_stack_info([CP|LCPs],[Env|LEnvs],I,Cont) --> { yap_hacks:continuation(Env, _, NCont, CB), I1 is I-1 }, ( { CP == Env, CB < CP } -> % if we follow choice-point and we cut to before choice-point % we are the same goal show_cp(CP, 'Cur'), % display_stack_info(LCPs, LEnvs, I1, NCont) ; { CP > Env } -> show_cp(CP, 'Next'), display_stack_info(LCPs,[Env|LEnvs],I1,Cont) ; show_env(Env,Cont,NCont), display_stack_info([CP|LCPs],LEnvs,I1,NCont) ). show_cp(CP, Continuation) --> { yap_hacks:choicepoint(CP, Addr, Mod, Name, Arity, Goal, ClNo) }, ( { Goal = (_;_) } -> [ '0x~16r~t*~16+ Cur~t~d~16+ ~q:~q/~d( ? ; ? )~n'- [Addr, ClNo, Mod, Name, Arity] ] ; { prolog_flag( debugger_print_options, Opts) }, [ '0x~16r~t *~16+ ~a~t ~d~16+ ~q:' - [Addr, Continuation, ClNo, Mod]] ), {clean_goal(Goal,Mod,G)}, ['~@.~n' - write_term(G,Opts)]. show_env(Env,Cont,NCont) --> { yap_hacks:continuation(Env, Addr, NCont, _), yap_hacks:cp_to_predicate(Cont, Mod, Name, Arity, ClId) }, [ '0x~16r~t ~16+ Cur~t ~d~16+ ~q:' - [Addr, ClId, Mod] ], {scratch_goal(Name, Arity, Mod, G)}, ['~@.~n' - write_term(G,Opts)]. clean_goal(G,Mod,NG) :- beautify_hidden_goal(G,Mod,[NG],[]), !. clean_goal(G,_,G). scratch_goal(N,A,Mod,NG) :- list_of_qmarks(A,L), G=..[N|L], ( beautify_hidden_goal(G,Mod,[NG],[]) ; G = NG ), !. list_of_qmarks(0,[]) :- !. list_of_qmarks(I,[?|L]) :- I1 is I-1, list_of_qmarks(I1,L). beautify_hidden_goal('$yes_no'(G,Query), prolog) --> !, { Call =.. [(?), G] }, [Call]. beautify_hidden_goal('$do_yes_no'(G,Mod), prolog) --> [Mod:G]. beautify_hidden_goal('$query'(G,VarList), prolog) --> [query(G,VarList)]. beautify_hidden_goal('$enter_top_level', prolog) --> ['TopLevel']. % The user should never know these exist. beautify_hidden_goal('$csult'(Files,Mod),prolog) --> [reconsult(Mod:Files)]. beautify_hidden_goal('$use_module'(Files,Mod,Is),prolog) --> [use_module(Mod,Files,Is)]. beautify_hidden_goal('$continue_with_command'(reconsult,V,G,Source),prolog) --> ['Assert'(G,V,Source)]. beautify_hidden_goal('$continue_with_command'(consult,V,G,Source),prolog) --> ['Assert'(G,V,Source)]. beautify_hidden_goal('$continue_with_command'(top,V,G,_),prolog) --> ['Query'(G,V)]. beautify_hidden_goal('$continue_with_command'(Command,V,G,Source),prolog) --> ['TopLevel'(Command,G,V,Source)]. beautify_hidden_goal('$spycall'(G,M,InControl,Redo),prolog) --> ['DebuggerCall'(M:G, InControl, Redo)]. beautify_hidden_goal('$do_spy'(Goal, Mod, CP, InControl),prolog) --> ['DebuggerCall'(Mod:Goal, InControl)]. beautify_hidden_goal('$system_catch'(G,Mod,Exc,Handler),prolog) --> [catch(Mod:G, Exc, Handler)]. beautify_hidden_goal('$catch'(G,Exc,Handler),prolog) --> [catch(G, Exc, Handler)]. beautify_hidden_goal('$execute_command'(Query,V,Option,Source),prolog) --> [toplevel_query(Query, V, Option, Source)]. beautify_hidden_goal('$process_directive'(Gs,_,Mod),prolog) --> [(:- Mod:Gs)]. beautify_hidden_goal('$loop'(Stream,Option),prolog) --> [execute_load_file(Stream, consult=Option)]. beautify_hidden_goal('$load_files'(Files,Opts,?),prolog) --> [load_files(Files,Opts)]. beautify_hidden_goal('$load_files'(_,_,Name),prolog) --> [Name]. beautify_hidden_goal('$reconsult'(Files,Mod),prolog) --> [reconsult(Mod:Files)]. beautify_hidden_goal('$undefp'([M|G]),prolog) --> ['CallUndefined'(Mod:G)]. beautify_hidden_goal('$undefp'(?),prolog) --> ['CallUndefined'(?:?)]. beautify_hidden_goal(repeat,prolog) --> [repeat]. beautify_hidden_goal('$recorded_with_key'(A,B,C),prolog) --> recorded(A,B,C). beautify_hidden_goal('$findall_with_common_vars'(Templ,Gen,Answ),prolog) --> [findall(Templ,Gen,Answ)]. beautify_hidden_goal('$bagof'(Templ,Gen,Answ),prolog) --> [bagof(Templ,Gen,Answ)]. beautify_hidden_goal('$setof'(Templ,Gen,Answ),prolog) --> [setof(Templ,Gen,Answ)]. beautify_hidden_goal('$findall'(T,G,S,A),prolog) --> [findall(T,G,S,A)]. beautify_hidden_goal('$listing'(G,M,_Stream),prolog) --> [listing(M:G)]. beautify_hidden_goal('$call'(G,CP,?,M),prolog) --> [call(M:G)]. beautify_hidden_goal('$call'(G,CP,G0,M),prolog) --> [call(M:G0)]. beautify_hidden_goal('$current_predicate'(M,Na,Ar),prolog) --> [current_predicate(M,Na/Ar)]. beautify_hidden_goal('$current_predicate_for_atom'(M,Na,Ar),prolog) --> [current_predicate(M,Na/Ar)]. beautify_hidden_goal('$list_clauses'(Stream,M,Pred),prolog) --> [listing(M:Pred)].