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mercury/browser/declarative_user.m
Zoltan Somogyi b56885be93 Fix a bug that caused bootchecks with --optimize-constructor-last-call to fail. 
Estimated hours taken: 12
Branches: main

Fix a bug that caused bootchecks with --optimize-constructor-last-call to fail.

The problem was not in lco.m, but in follow_code.m. In some cases,
(specifically, the LCMC version of insert_2 in sparse_bitset.m),
follow_code.m moved an impure goal (store_at_ref) into the arms of an
if-then-else without marking those arms, or the if-then-else, as impure.
The next pass, simplify, then deleted the entire if-then-else, since it
had no outputs. (The store_at_ref that originally appeared after the
if-then-else was the only consumer of its only output.)

The fix is to get follow_code.m to make branched control structures such as
if-then-elses, as well as their arms, semipure or impure if a goal being moved
into them is semipure or impure, or if they came from an semipure or impure
conjunction.

Improve the optimization of the LCMC version of sparse_bitset.insert_2, which
had a foreign_proc invocation of bits_per_int in it: replace such invocations
with a unification of the bits_per_int constant if not cross compiling.

Add a new option, --optimize-constructor-last-call-null. When set, LCMC will
assign NULLs to the fields not yet filled in, to avoid any junk happens to be
there from being followed by the garbage collector's mark phase.

This diff also makes several other changes that helped me to track down
the bug above.

compiler/follow_code.m:
	Make the fix described above.

	Delete all the provisions for --prev-code; it won't be implemented.

	Don't export a predicate that is not now used anywhere else.

compiler/simplify.m:
	Make the optimization described above.

compiler/lco.m:
	Make sure that the LCMC specialized procedure is a predicate, not a
	function: having a function with the mode LCMC_insert_2(in, in) = in
	looks wrong.

	To avoid name collisions when a function and a predicate with the same
	name and arity have LCMC applied to them, include the predicate vs
	function status of the original procedure included in the name of the
	new procedure.

	Update the sym_name of calls to LCMC variants, not just the pred_id,
	because without that, the HLDS dump looks misleading.

compiler/pred_table.m:
	Don't have optimizations like LCMC insert new predicates at the front
	of the list of predicates. Maintain the list of predicates in the
	module as a two part list, to allow efficient addition of new pred_ids
	at the (logical) end without using O(N^2) algorithms. Having predicates
	in chronological order makes it easier to look at HLDS dumps and
	.c files.

compiler/hlds_module.m:
	Make module_info_predids return a module_info that is physically
	updated though logically unchanged.

compiler/options.m:
	Add --optimize-constructor-last-call-null.

	Make the options --dump-hlds-pred-id, --debug-opt-pred-id and
	--debug-opt-pred-name into accumulating options, to allow the user
	to specify more than one predicate to be dumped (e.g. insert_2 and
	its LCMC variant).

	Delete --prev-code.

doc/user_guide.texi:
	Document the changes in options.m.

compiler/code_info.m:
	Record the value of --optimize-constructor-last-call-null in the
	code_info, to avoid lookup at every cell construction.

compiler/unify_gen.m:
compiler/var_locn.m:
	When deciding whether a cell can be static or not, make sure that
	we never make static a cell that has some fields initialized with
	dummy zeros, to be filled in for real later.

compiler/hlds_out.m:
	For goals that are semipure or impure, note this fact. This info was
	lost when I changed the representation of impurity from markers to a
	field.

mdbcomp/prim_data.m:
	Rename some ambiguous function symbols.

compiler/intermod.m:
compiler/trans_opt.m:
	Rename the main predicates (and some function symbols) of these modules
	to avoid ambiguity and to make them more expressive.

compiler/llds.m:
	Don't print line numbers for foreign_code fragments if the user has
	specified --no-line-numbers.

compiler/make.dependencies.m:
compiler/mercury_to_mercury.m:
compiler/recompilation.usage.m:
	Don't use io.write to write out information to files we may need to
	parse again, because this is vulnerable to changes to the names of
	function symbols (e.g. the one to mdbcomp/prim_data.m).

	The compiler still contains some uses of io.write, but they are
	for debugging. I added an item to the todo list of the one exception,
	ilasm.m.

compiler/recompilation.m:
	Rename a misleading function symbol name.

compiler/parse_tree.m:
	Don't import recompilation.m here. It is not needed (all the components
	of parse_tree that need recompilation.m already import it themselves),
	and deleting the import avoids recompiling almost everything when
	recompilation.m changes.

compiler/*.m:
	Conform to the changes above.

compiler/*.m:
browser/*.m:
slice/*.m:
	Conform to the change to mdbcomp.

library/sparse_bitset.m:
	Use some better variable names.
2007-01-19 07:05:06 +00:00

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%-----------------------------------------------------------------------------%
% vim: ft=mercury ts=4 sw=4 et
%-----------------------------------------------------------------------------%
% Copyright (C) 1999-2007 The University of Melbourne.
% This file may only be copied under the terms of the GNU Library General
% Public License - see the file COPYING.LIB in the Mercury distribution.
%-----------------------------------------------------------------------------%
%
% File: declarative_user.m.
% Author: Mark Brown.
%
% This module performs all the user interaction of the front end of the
% declarative debugger. It is responsible for displaying questions and bugs
% in a human-readable format, and for getting responses to debugger queries
% from the user.
%
%-----------------------------------------------------------------------------%
%-----------------------------------------------------------------------------%
:- module mdb.declarative_user.
:- interface.
:- import_module mdb.browser_info.
:- import_module mdb.declarative_debugger.
:- import_module mdb.help.
:- import_module bool.
:- import_module io.
%-----------------------------------------------------------------------------%
:- type user_question(T)
---> plain_question(decl_question(T))
; question_with_default(decl_question(T), decl_truth).
:- type user_response(T)
---> user_response_answer(decl_question(T), decl_answer(T))
; user_response_trust_predicate(decl_question(T))
; user_response_trust_module(decl_question(T))
; user_response_show_info(io.output_stream)
% Request that the analyser display some information about the
% state of the search and the current question to the given output
% stream.
; user_response_change_search(user_search_mode)
% Request that a new search strategy be used.
; user_response_undo
% The user wants to undo the last answer they gave.
; user_response_exit_diagnosis(T)
; user_response_abort_diagnosis.
:- type user_search_mode
---> user_top_down
; user_divide_and_query
; user_suspicion_divide_and_query
; user_binary.
:- type user_state.
:- pred user_state_init(io.input_stream::in, io.output_stream::in,
browser_info.browser_persistent_state::in, help.system::in,
user_state::out) is det.
% This predicate handles the interactive part of the declarative
% debugging process. The user is presented with a question,
% possibly with a default answer, and is asked to respond about the
% truth of it in the intended interpretation.
%
:- pred query_user(user_question(T)::in, user_response(T)::out,
user_state::in, user_state::out, io::di, io::uo) is cc_multi.
% Confirm that the node found is indeed an e_bug or an i_bug.
%
:- pred user_confirm_bug(decl_bug::in, decl_confirmation::out,
user_state::in, user_state::out, io::di, io::uo) is cc_multi.
% Returns the state of the term browser.
%
:- func get_browser_state(user_state) = browser_info.browser_persistent_state.
% Sets the state of the term browser.
%
:- pred set_browser_state(browser_info.browser_persistent_state::in,
user_state::in, user_state::out) is det.
% Return the output stream used for interacting with the user.
%
:- func get_user_output_stream(user_state) = io.output_stream.
% Set the testing flag of the user_state.
%
:- pred set_user_testing_flag(bool::in, user_state::in, user_state::out)
is det.
%-----------------------------------------------------------------------------%
%-----------------------------------------------------------------------------%
:- implementation.
:- import_module mdb.browse.
:- import_module mdb.browser_term.
:- import_module mdb.declarative_execution.
:- import_module mdb.declarative_tree.
:- import_module mdb.io_action.
:- import_module mdb.parse.
:- import_module mdb.term_rep.
:- import_module mdb.util.
:- import_module mdbcomp.prim_data.
:- import_module mdbcomp.program_representation.
:- import_module mdbcomp.rtti_access.
:- import_module char.
:- import_module deconstruct.
:- import_module exception.
:- import_module getopt.
:- import_module int.
:- import_module list.
:- import_module maybe.
:- import_module string.
:- import_module svmap.
:- import_module univ.
%-----------------------------------------------------------------------------%
:- type user_command
---> user_cmd_yes
% The node is correct.
; user_cmd_no
% The node is erroneous.
; user_cmd_inadmissible
% The node is inadmissible.
; user_cmd_skip
% The user has no answer.
; user_cmd_browse_arg(maybe(int))
% Browse the nth argument before answering. Or browse
% the whole predicate/function if the maybe is no.
; user_cmd_browse_xml_arg(maybe(int))
% Browse the argument using an XML browser.
; user_cmd_browse_io(int)
% Browse the nth IO action before answering.
; user_cmd_print_arg(int, int)
% Print the nth to the mth arguments before answering.
; user_cmd_print_io(int, int)
% Print the nth to the mth IO actions before answering.
; user_cmd_pd
% Commence procedural debugging from this point.
; user_cmd_param_command(param_cmd)
; user_cmd_trust_predicate
% Trust the predicate being asked about.
; user_cmd_trust_module
% Trust the module being asked about.
; user_cmd_info
% Print some information about the current question.
; user_cmd_undo
% Undo the user's last answer.
; user_cmd_ask
% The user wants the current question re-asked.
; user_cmd_change_search(user_search_mode)
% Change the current search strategy.
; user_cmd_quit
% Abort this diagnosis session.
; user_cmd_help(maybe(string))
% Request help before answering. If the maybe argument
% is no then a general help message is displayed,
% otherwise help on the given command is displayed.
; user_cmd_empty
% User just pressed return.
; user_cmd_illegal.
% None of the above.
:- type user_state
---> user_state(
instr :: io.input_stream,
outstr :: io.output_stream,
browser :: browser_persistent_state,
% Yes if the question should be displayed when querying
% the user. This is used to suppress the displaying of the
% question after the user issues a command which does not
% answer the question (such as an `info' command).
display_question :: bool,
help_system :: help.system,
% If this following flag is set to yes then user responses
% will be simulated and will always be `no', except when
% confirming a bug in which case the response will be `yes'.
testing :: bool
).
user_state_init(InStr, OutStr, Browser, HelpSystem,
user_state(InStr, OutStr, Browser, yes, HelpSystem, no)).
%-----------------------------------------------------------------------------%
query_user(UserQuestion, Response, !User, !IO) :-
Question = get_decl_question(UserQuestion),
(
!.User ^ testing = yes,
Node = get_decl_question_node(Question),
Response = user_response_answer(Question,
truth_value(Node, truth_erroneous))
;
!.User ^ testing = no,
(
!.User ^ display_question = yes,
write_decl_question(Question, !.User, !IO),
user_question_prompt(UserQuestion, Prompt),
!:User = !.User ^ display_question := no
;
!.User ^ display_question = no,
Prompt = "dd> "
),
get_command(Prompt, Command, !User, !IO),
handle_command(Command, UserQuestion, Response, !User, !IO),
( Response \= user_response_show_info(_) ->
!:User = !.User ^ display_question := yes
;
true
)
).
:- pred handle_command(user_command::in, user_question(T)::in,
user_response(T)::out, user_state::in, user_state::out,
io::di, io::uo) is cc_multi.
handle_command(user_cmd_yes, UserQuestion, Response, !User, !IO) :-
Question = get_decl_question(UserQuestion),
Node = get_decl_question_node(Question),
Response = user_response_answer(Question,
truth_value(Node, truth_correct)).
handle_command(user_cmd_no, UserQuestion, Response, !User, !IO) :-
Question = get_decl_question(UserQuestion),
Node = get_decl_question_node(Question),
Response = user_response_answer(Question,
truth_value(Node, truth_erroneous)).
handle_command(user_cmd_inadmissible, UserQuestion, Response, !User, !IO) :-
Question = get_decl_question(UserQuestion),
Node = get_decl_question_node(Question),
Response = user_response_answer(Question,
truth_value(Node, truth_inadmissible)).
handle_command(user_cmd_skip, UserQuestion, Response, !User, !IO) :-
Question = get_decl_question(UserQuestion),
Node = get_decl_question_node(Question),
Response = user_response_answer(Question, skip(Node)).
handle_command(user_cmd_browse_arg(MaybeArgNum), UserQuestion, Response,
!User, !IO) :-
Question = get_decl_question(UserQuestion),
edt_node_trace_atoms(Question, InitAtom, FinalAtom),
(
MaybeArgNum = yes(ArgNum),
browse_atom_argument(InitAtom, FinalAtom, ArgNum, MaybeTrack,
!User, !IO),
(
MaybeTrack = no_track,
query_user(UserQuestion, Response, !User, !IO)
;
MaybeTrack = track(HowTrack, ShouldAssertInvalid, TermPath),
ArgPos = arg_num_to_arg_pos(ArgNum),
Node = get_decl_question_node(Question),
Answer = suspicious_subterm(Node, ArgPos, TermPath, HowTrack,
ShouldAssertInvalid),
Response = user_response_answer(Question, Answer)
)
;
MaybeArgNum = no,
browse_atom(InitAtom, FinalAtom, MaybeTrack, !User, !IO),
(
MaybeTrack = no_track,
query_user(UserQuestion, Response, !User, !IO)
;
MaybeTrack = track(HowTrack, ShouldAssertInvalid,
[ArgNum | TermPath]),
ArgPos = arg_num_to_arg_pos(ArgNum),
Node = get_decl_question_node(Question),
Answer = suspicious_subterm(Node, ArgPos, TermPath,
HowTrack, ShouldAssertInvalid),
Response = user_response_answer(Question, Answer)
;
%
% Tracking the entire atom doesn't make sense.
%
MaybeTrack = track(_, _, []),
io.write_string(!.User ^ outstr,
"Cannot track the entire atom. " ++
"Please select a subterm to track.\n", !IO),
query_user(UserQuestion, Response, !User, !IO)
)
).
handle_command(user_cmd_browse_xml_arg(MaybeArgNum), UserQuestion, Response,
!User, !IO) :-
Question = get_decl_question(UserQuestion),
edt_node_trace_atoms(Question, _, FinalAtom),
(
MaybeArgNum = yes(ArgNum),
browse_xml_atom_argument(FinalAtom, ArgNum, !.User, !IO)
;
MaybeArgNum = no,
browse_xml_atom(FinalAtom, !.User, !IO)
),
query_user(UserQuestion, Response, !User, !IO).
handle_command(user_cmd_print_arg(From, To), UserQuestion, Response,
!User, !IO) :-
Question = get_decl_question(UserQuestion),
edt_node_trace_atoms(Question, _, TraceAtom),
print_atom_arguments(TraceAtom, From, To, !.User, !IO),
query_user(UserQuestion, Response, !User, !IO).
handle_command(user_cmd_param_command(ParamCommand), UserQuestion, Response,
!User, !IO) :-
Browser0 = !.User ^ browser,
DummyTerm = synthetic_term("", [], no),
Info0 = browser_info(DummyTerm, [], print, no, Browser0, no_track, no),
run_param_command(internal, ParamCommand, no, Info0, Info, !IO),
Info = browser_info(_, _, _, _, Browser, _, _),
!:User = !.User ^ browser := Browser,
query_user(UserQuestion, Response, !User, !IO).
handle_command(user_cmd_trust_predicate, UserQuestion,
user_response_trust_predicate(Question), !User, !IO) :-
Question = get_decl_question(UserQuestion).
handle_command(user_cmd_trust_module, UserQuestion,
user_response_trust_module(Question), !User, !IO) :-
Question = get_decl_question(UserQuestion).
handle_command(user_cmd_info, _, user_response_show_info(!.User ^ outstr),
!User, !IO).
handle_command(user_cmd_undo, _, user_response_undo, !User, !IO).
handle_command(user_cmd_browse_io(ActionNum), UserQuestion, Response,
!User, !IO) :-
Question = get_decl_question(UserQuestion),
edt_node_io_actions(Question, MaybeIoActions),
% We don't have code yet to trace a marked I/O action.
browse_chosen_io_action(MaybeIoActions, ActionNum, _MaybeTrack,
!User, !IO),
query_user(UserQuestion, Response, !User, !IO).
handle_command(user_cmd_print_io(From, To), UserQuestion, Response,
!User, !IO) :-
Question = get_decl_question(UserQuestion),
edt_node_io_actions(Question, MaybeIoActions),
print_chosen_io_actions(MaybeIoActions, From, To, !.User, !IO),
query_user(UserQuestion, Response, !User, !IO).
handle_command(user_cmd_change_search(Mode), _,
user_response_change_search(Mode), !User, !IO).
handle_command(user_cmd_ask, UserQuestion, Response, !User, !IO) :-
!:User = !.User ^ display_question := yes,
query_user(UserQuestion, Response, !User, !IO).
handle_command(user_cmd_pd, UserQuestion, Response, !User, !IO) :-
Question = get_decl_question(UserQuestion),
Node = get_decl_question_node(Question),
Response = user_response_exit_diagnosis(Node).
handle_command(user_cmd_quit, _, Response, !User, !IO) :-
Response = user_response_abort_diagnosis.
handle_command(user_cmd_help(MaybeCmd), UserQuestion, Response, !User, !IO) :-
(
MaybeCmd = yes(Cmd),
Path = ["decl", Cmd]
;
MaybeCmd = no,
Path = ["concepts", "decl_debug"]
),
help.path(!.User ^ help_system, Path, !.User ^ outstr, Res, !IO),
(
Res = help_ok
;
Res = help_error(Message),
io.write_strings([Message, "\n"], !IO)
),
query_user(UserQuestion, Response, !User, !IO).
handle_command(user_cmd_empty, UserQuestion, Response, !User, !IO) :-
(
UserQuestion = plain_question(_),
Command = user_cmd_skip
;
UserQuestion = question_with_default(_, Truth),
(
Truth = truth_correct,
Command = user_cmd_yes
;
Truth = truth_erroneous,
Command = user_cmd_no
;
Truth = truth_inadmissible,
Command = user_cmd_inadmissible
)
),
handle_command(Command, UserQuestion, Response, !User, !IO).
handle_command(user_cmd_illegal, UserQuestion, Response, !User, !IO) :-
io.write_string(!.User ^ outstr, "Unknown command, 'h' for help.\n", !IO),
query_user(UserQuestion, Response, !User, !IO).
:- func arg_num_to_arg_pos(int) = arg_pos.
arg_num_to_arg_pos(ArgNum) = ArgPos :-
Which = chosen_head_vars_presentation,
(
Which = only_user_headvars,
ArgPos = user_head_var(ArgNum)
;
Which = all_headvars,
ArgPos = any_head_var(ArgNum)
).
:- func get_decl_question(user_question(T)) = decl_question(T).
get_decl_question(plain_question(Q)) = Q.
get_decl_question(question_with_default(Q, _)) = Q.
:- pred user_question_prompt(user_question(T)::in, string::out) is det.
user_question_prompt(plain_question(Question), Prompt) :-
decl_question_prompt(Question, Prompt).
user_question_prompt(question_with_default(Question, DefaultTruth), Prompt) :-
decl_question_prompt(Question, QuestionPrompt),
default_prompt(DefaultTruth, DefaultPrompt),
string.append(QuestionPrompt, DefaultPrompt, Prompt).
:- pred decl_question_prompt(decl_question(T)::in, string::out) is det.
decl_question_prompt(wrong_answer(_, _, _), "Valid? ").
decl_question_prompt(missing_answer(_, _, [_ | _]), "Complete? ").
decl_question_prompt(missing_answer(_, _, []), "Unsatisfiable? ").
decl_question_prompt(unexpected_exception(_, _, _), "Expected? ").
:- pred default_prompt(decl_truth::in, string::out) is det.
default_prompt(truth_correct, "[yes] ").
default_prompt(truth_erroneous, "[no] ").
default_prompt(truth_inadmissible, "[inadmissible] ").
% Find the initial and final atoms for a question. For all
% questions besides wrong answer questions the initial and
% final atoms will be the same.
%
:- pred edt_node_trace_atoms(decl_question(T)::in, trace_atom::out,
trace_atom::out) is det.
edt_node_trace_atoms(wrong_answer(_, InitDeclAtom, FinalDeclAtom),
InitDeclAtom ^ init_atom, FinalDeclAtom ^ final_atom).
edt_node_trace_atoms(missing_answer(_, InitDeclAtom, _),
InitDeclAtom ^ init_atom, InitDeclAtom ^ init_atom).
edt_node_trace_atoms(unexpected_exception(_, InitDeclAtom, _),
InitDeclAtom ^ init_atom, InitDeclAtom ^ init_atom).
:- pred edt_node_io_actions(decl_question(T)::in, maybe(io_action_range)::out)
is det.
edt_node_io_actions(wrong_answer(_, _, FinalDeclAtom),
FinalDeclAtom ^ final_io_actions).
edt_node_io_actions(missing_answer(_, _, _), no).
edt_node_io_actions(unexpected_exception(_, _, _), no).
:- pred decl_bug_trace_atom(decl_bug::in, trace_atom::out, trace_atom::out)
is det.
decl_bug_trace_atom(e_bug(incorrect_contour(InitDeclAtom, FinalDeclAtom, _,
_)), InitDeclAtom ^ init_atom, FinalDeclAtom ^ final_atom).
decl_bug_trace_atom(e_bug(partially_uncovered_atom(InitDeclAtom, _)),
InitDeclAtom ^ init_atom, InitDeclAtom ^ init_atom).
decl_bug_trace_atom(e_bug(unhandled_exception(InitDeclAtom, _, _)),
InitDeclAtom ^ init_atom, InitDeclAtom ^ init_atom).
decl_bug_trace_atom(i_bug(inadmissible_call(_, _, InitDeclAtom, _)),
InitDeclAtom ^ init_atom, InitDeclAtom ^ init_atom).
:- pred decl_bug_io_actions(decl_bug::in, maybe(io_action_range)::out) is det.
decl_bug_io_actions(e_bug(incorrect_contour(_, FinalDeclAtom, _, _)),
FinalDeclAtom ^ final_io_actions).
decl_bug_io_actions(e_bug(partially_uncovered_atom(_, _)), no).
decl_bug_io_actions(e_bug(unhandled_exception(_, _, _)), no).
decl_bug_io_actions(i_bug(inadmissible_call(_, _, _, _)), no).
:- pred browse_chosen_io_action(maybe(io_action_range)::in, int::in,
maybe_track_subterm(term_path)::out, user_state::in, user_state::out,
io::di, io::uo) is cc_multi.
browse_chosen_io_action(MaybeIoActions, ActionNum, MaybeTrack, !User, !IO) :-
(
MaybeIoActions = yes(IoActions),
find_tabled_io_action(IoActions, ActionNum, MaybeIoAction, !IO),
(
MaybeIoAction = yes(IoAction),
browse_io_action(IoAction, MaybeTrack, !User, !IO)
;
MaybeIoAction = no,
MaybeTrack = no_track
)
;
MaybeIoActions = no,
io.write_string("No such IO action.\n", !IO),
MaybeTrack = no_track
).
:- pred find_tabled_io_action(io_action_range::in, int::in,
maybe(io_action)::out, io::di, io::uo) is det.
find_tabled_io_action(io_action_range(Cur, End), TabledActionNum,
MaybeIoAction, !IO) :-
( Cur = End ->
MaybeIoAction = no
;
get_maybe_io_action(Cur, MaybeTabledIoAction, !IO),
(
MaybeTabledIoAction = tabled(IoAction),
( TabledActionNum = 1 ->
MaybeIoAction = yes(IoAction)
;
find_tabled_io_action(io_action_range(Cur + 1, End),
TabledActionNum - 1, MaybeIoAction, !IO)
)
;
MaybeTabledIoAction = untabled,
find_tabled_io_action(io_action_range(Cur + 1, End),
TabledActionNum, MaybeIoAction, !IO)
)
).
:- pred print_chosen_io_actions(maybe(io_action_range)::in, int::in, int::in,
user_state::in, io::di, io::uo) is cc_multi.
print_chosen_io_actions(MaybeIoActions, From, To, User0, !IO) :-
print_chosen_io_action(MaybeIoActions, From, User0, OK, !IO),
(
OK = yes,
From + 1 =< To
->
print_chosen_io_actions(MaybeIoActions, From + 1, To, User0, !IO)
;
true
).
:- pred print_chosen_io_action(maybe(io_action_range)::in, int::in,
user_state::in, bool::out, io::di, io::uo) is cc_multi.
print_chosen_io_action(MaybeIoActions, ActionNum, User0, OK, !IO) :-
(
MaybeIoActions = yes(IoActions),
find_tabled_io_action(IoActions, ActionNum, MaybeIoAction, !IO),
(
MaybeIoAction = yes(IoAction),
print_tabled_io_action(User0, tabled(IoAction), !IO),
OK = yes
;
MaybeIoAction = no,
io.write_string("No such IO action.\n", !IO),
OK = no
)
;
MaybeIoActions = no,
io.write_string("No such IO action.\n", !IO),
OK = no
).
:- pred browse_io_action(io_action::in, maybe_track_subterm(term_path)::out,
user_state::in, user_state::out, io::di, io::uo) is cc_multi.
browse_io_action(IoAction, no_track, !User, !IO) :-
Term = io_action_to_browser_term(IoAction),
browse_browser_term(Term, !.User ^ instr, !.User ^ outstr, no,
MaybeTrackDirs, !.User ^ browser, Browser, !IO),
(
MaybeTrackDirs = track(_, _, _),
io.write_string(!.User ^ outstr,
"Sorry, tracking of I/O actions is not yet supported.\n", !IO),
browse_io_action(IoAction, _, !User, !IO)
;
MaybeTrackDirs = no_track
),
!:User = !.User ^ browser := Browser.
:- pred browse_decl_bug(decl_bug::in, maybe(int)::in, user_state::in,
user_state::out, io::di, io::uo) is cc_multi.
browse_decl_bug(Bug, MaybeArgNum, !User, !IO) :-
decl_bug_trace_atom(Bug, InitAtom, FinalAtom),
(
MaybeArgNum = yes(ArgNum),
browse_atom_argument(InitAtom, FinalAtom, ArgNum, _, !User, !IO)
;
MaybeArgNum = no,
browse_atom(InitAtom, FinalAtom, _, !User, !IO)
).
:- pred browse_xml_decl_bug(decl_bug::in, maybe(int)::in, user_state::in,
io::di, io::uo) is cc_multi.
browse_xml_decl_bug(Bug, MaybeArgNum, User, !IO) :-
decl_bug_trace_atom(Bug, _, FinalAtom),
(
MaybeArgNum = yes(ArgNum),
browse_xml_atom_argument(FinalAtom, ArgNum, User, !IO)
;
MaybeArgNum = no,
browse_xml_atom(FinalAtom, User, !IO)
).
:- pred browse_atom_argument(trace_atom::in, trace_atom::in, int::in,
maybe_track_subterm(term_path)::out, user_state::in, user_state::out,
io::di, io::uo) is cc_multi.
browse_atom_argument(InitAtom, FinalAtom, ArgNum, MaybeTrack, !User, !IO) :-
FinalAtom = atom(_, Args0),
maybe_filter_headvars(chosen_head_vars_presentation, Args0, Args),
(
list.index1(Args, ArgNum, ArgInfo),
ArgInfo = arg_info(_, _, MaybeArg),
MaybeArg = yes(ArgRep),
term_rep.rep_to_univ(ArgRep, Arg)
->
browse_browser_term(univ_to_browser_term(Arg),
!.User ^ instr, !.User ^ outstr,
yes(get_subterm_mode_from_atoms_for_arg(ArgNum,
InitAtom, FinalAtom)),
MaybeTrackDirs, !.User ^ browser, Browser, !IO),
convert_maybe_track_dirs_to_term_path_from_arg(ArgRep,
MaybeTrackDirs, MaybeTrack),
!:User = !.User ^ browser := Browser
;
io.write_string(!.User ^ outstr, "Invalid argument number\n", !IO),
MaybeTrack = no_track
).
:- pred browse_xml_atom_argument(trace_atom::in, int::in, user_state::in,
io::di, io::uo) is cc_multi.
browse_xml_atom_argument(Atom, ArgNum, User, !IO) :-
Atom = atom(_, Args0),
maybe_filter_headvars(chosen_head_vars_presentation, Args0, Args),
(
list.index1(Args, ArgNum, ArgInfo),
ArgInfo = arg_info(_, _, MaybeArg),
MaybeArg = yes(ArgRep),
term_rep.rep_to_univ(ArgRep, Arg)
->
save_and_browse_browser_term_xml(univ_to_browser_term(Arg),
User ^ outstr, User ^ outstr, User ^ browser, !IO)
;
io.write_string(User ^ outstr, "Invalid argument number\n", !IO)
).
:- pred browse_atom(trace_atom::in, trace_atom::in,
maybe_track_subterm(term_path)::out,
user_state::in, user_state::out, io::di, io::uo) is cc_multi.
browse_atom(InitAtom, FinalAtom, MaybeTrack, !User, !IO) :-
FinalAtom = atom(ProcLayout, Args),
ProcLabel = get_proc_label_from_layout(ProcLayout),
get_user_arg_values(Args, ArgValues),
get_pred_attributes(ProcLabel, Module, Name, _, PredOrFunc),
IsFunction = pred_to_bool(unify(PredOrFunc, pf_function)),
ModuleStr = sym_name_to_string(Module),
BrowserTerm = synthetic_term_to_browser_term(ModuleStr ++ "." ++ Name,
ArgValues, IsFunction),
browse_browser_term(BrowserTerm, !.User ^ instr, !.User ^ outstr,
yes(get_subterm_mode_from_atoms(InitAtom, FinalAtom)),
MaybeTrackDirs, !.User ^ browser, Browser, !IO),
convert_maybe_track_dirs_to_term_path_from_atom(FinalAtom,
MaybeTrackDirs, MaybeTrack),
!:User = !.User ^ browser := Browser.
:- pred browse_xml_atom(trace_atom::in, user_state::in, io::di, io::uo)
is cc_multi.
browse_xml_atom(Atom, User, !IO) :-
Atom = atom(ProcLayout, Args),
ProcLabel = get_proc_label_from_layout(ProcLayout),
get_user_arg_values(Args, ArgValues),
get_pred_attributes(ProcLabel, Module, Name, _, PredOrFunc),
IsFunction = pred_to_bool(unify(PredOrFunc, pf_function)),
ModuleStr = sym_name_to_string(Module),
BrowserTerm = synthetic_term_to_browser_term(ModuleStr ++ "." ++ Name,
ArgValues, IsFunction),
save_and_browse_browser_term_xml(BrowserTerm, User ^ outstr,
User ^ outstr, User ^ browser, !IO).
:- func get_subterm_mode_from_atoms(trace_atom::in, trace_atom::in,
list(dir)::in(simplified_dirs)) = (browser_term_mode::out) is det.
get_subterm_mode_from_atoms(InitAtom, FinalAtom, Dirs) = Mode :-
convert_dirs_to_term_path_from_atom(FinalAtom, Dirs, Path),
(
Path = [ArgNum | TermPath],
ArgPos = arg_num_to_arg_pos(ArgNum),
Mode = get_subterm_mode_from_atoms_and_term_path(InitAtom,
FinalAtom, ArgPos, TermPath)
;
Path = [],
Mode = not_applicable
).
:- func get_subterm_mode_from_atoms_and_term_path(trace_atom, trace_atom,
arg_pos, term_path) = browser_term_mode.
get_subterm_mode_from_atoms_and_term_path(InitAtom, FinalAtom, ArgPos,
TermPath) = Mode :-
( trace_atom_subterm_is_ground(InitAtom, ArgPos, TermPath) ->
Mode = input
; trace_atom_subterm_is_ground(FinalAtom, ArgPos, TermPath) ->
Mode = output
;
Mode = unbound
).
:- func get_subterm_mode_from_atoms_for_arg(int::in, trace_atom::in,
trace_atom::in, list(dir)::in(simplified_dirs)) =
(browser_term_mode::out) is det.
get_subterm_mode_from_atoms_for_arg(ArgNum, InitAtom, FinalAtom, Dirs)
= Mode :-
convert_dirs_to_term_path_from_atom(FinalAtom, Dirs, TermPath),
ArgPos = arg_num_to_arg_pos(ArgNum),
Mode = get_subterm_mode_from_atoms_and_term_path(InitAtom, FinalAtom,
ArgPos, TermPath).
:- pred get_user_arg_values(list(trace_atom_arg)::in, list(univ)::out) is det.
get_user_arg_values([], []).
get_user_arg_values([arg_info(UserVisible, _, MaybeValue) | Args], Values) :-
get_user_arg_values(Args, Values0),
(
UserVisible = yes,
(
MaybeValue = yes(ValueRep),
term_rep.rep_to_univ(ValueRep, Value)
;
MaybeValue = no,
Value = univ('_'`with_type`unbound)
),
Values = [Value | Values0]
;
UserVisible = no,
Values = Values0
).
:- pred print_atom_arguments(trace_atom::in, int::in, int::in, user_state::in,
io::di, io::uo) is cc_multi.
print_atom_arguments(Atom, From, To, User, !IO) :-
print_atom_argument(Atom, From, User, OK, !IO),
(
OK = yes,
From + 1 =< To
->
print_atom_arguments(Atom, From + 1, To, User, !IO)
;
true
).
:- pred print_atom_argument(trace_atom::in, int::in, user_state::in, bool::out,
io::di, io::uo) is cc_multi.
print_atom_argument(Atom, ArgNum, User, OK, !IO) :-
Atom = atom(_, Args0),
maybe_filter_headvars(chosen_head_vars_presentation, Args0, Args),
(
list.index1(Args, ArgNum, ArgInfo),
ArgInfo = arg_info(_, _, MaybeArg),
MaybeArg = yes(ArgRep),
term_rep.rep_to_univ(ArgRep, Arg)
->
print_browser_term(univ_to_browser_term(Arg), User ^ outstr,
decl_caller_type, User ^ browser, !IO),
OK = yes
;
io.write_string(User ^ outstr, "Invalid argument number\n", !IO),
OK = no
).
:- pred convert_maybe_track_dirs_to_term_path_from_atom(
trace_atom::in,
maybe_track_subterm(list(dir))::in,
maybe_track_subterm(term_path)::out) is det.
convert_maybe_track_dirs_to_term_path_from_atom(_, no_track, no_track).
convert_maybe_track_dirs_to_term_path_from_atom(Atom,
track(HowTrack, ShouldAssertInvalid, Dirs),
track(HowTrack, ShouldAssertInvalid, TermPath)) :-
simplify_dirs(Dirs, SimplifiedDirs),
convert_dirs_to_term_path_from_atom(Atom, SimplifiedDirs, TermPath).
:- pred convert_maybe_track_dirs_to_term_path_from_arg(
term_rep::in,
maybe_track_subterm(list(dir))::in,
maybe_track_subterm(term_path)::out) is det.
convert_maybe_track_dirs_to_term_path_from_arg(_, no_track, no_track).
convert_maybe_track_dirs_to_term_path_from_arg(Term,
track(HowTrack, ShouldAssertInvalid, Dirs),
track(HowTrack, ShouldAssertInvalid, TermPath)) :-
simplify_dirs(Dirs, SimplifiedDirs),
convert_dirs_to_term_path(Term, SimplifiedDirs, TermPath).
% Reverse the first argument and append the second to it.
%
:- pred reverse_and_append(list(T)::in, list(T)::in, list(T)::out) is det.
reverse_and_append([], Bs, Bs).
reverse_and_append([A | As], Bs, Cs) :-
reverse_and_append(As, [A | Bs], Cs).
%-----------------------------------------------------------------------------%
:- pred user_confirm_bug_help(user_state::in, io::di, io::uo) is det.
user_confirm_bug_help(User, !IO) :-
io.write_strings(User ^ outstr, [
"Answer one of:\n",
"\ty\tyes\t\tconfirm that the suspect is a bug\n",
"\tn\tno\t\tdo not accept that the suspect is a bug\n",
"\tb\tbrowse\t\tbrowse the suspect\n",
"\tq\tquit\t\t",
"abort this diagnosis session and return to mdb\n",
"\th, ?\thelp\t\tthis help message\n"
], !IO).
:- pred get_command(string::in, user_command::out,
user_state::in, user_state::out, io::di, io::uo) is det.
get_command(Prompt, Command, User, User, !IO) :-
util.trace_getline(Prompt, Result, User ^ instr, User ^ outstr, !IO),
(
Result = ok(String),
Words = string.words_separator(char.is_whitespace, String),
(
Words = [CmdWord | CmdArgs],
(
cmd_handler(CmdWord, CmdHandler),
CmdHandler(CmdArgs, CommandPrime)
->
Command = CommandPrime
;
Command = user_cmd_illegal
)
;
Words = [],
Command = user_cmd_empty
)
;
Result = error(Error),
io.error_message(Error, Msg),
io.write_string(User ^ outstr, Msg, !IO),
io.nl(User ^ outstr, !IO),
Command = user_cmd_quit
;
Result = eof,
Command = user_cmd_quit
).
:- pred cmd_handler(string::in,
(pred(list(string), user_command)::out(pred(in, out) is semidet)))
is semidet.
cmd_handler("y", one_word_cmd(user_cmd_yes)).
cmd_handler("yes", one_word_cmd(user_cmd_yes)).
cmd_handler("n", one_word_cmd(user_cmd_no)).
cmd_handler("no", one_word_cmd(user_cmd_no)).
cmd_handler("i", one_word_cmd(user_cmd_inadmissible)).
cmd_handler("inadmissible", one_word_cmd(user_cmd_inadmissible)).
cmd_handler("s", one_word_cmd(user_cmd_skip)).
cmd_handler("skip", one_word_cmd(user_cmd_skip)).
cmd_handler("pd", one_word_cmd(user_cmd_pd)).
% `abort' is a synonym for `quit' and is just here for backwards compatibility.
cmd_handler("a", one_word_cmd(user_cmd_quit)).
cmd_handler("abort", one_word_cmd(user_cmd_quit)).
cmd_handler("q", one_word_cmd(user_cmd_quit)).
cmd_handler("quit", one_word_cmd(user_cmd_quit)).
cmd_handler("?", help_cmd).
cmd_handler("h", help_cmd).
cmd_handler("help", help_cmd).
cmd_handler("info", one_word_cmd(user_cmd_info)).
cmd_handler("b", browse_arg_cmd).
cmd_handler("browse", browse_arg_cmd).
cmd_handler("p", print_arg_cmd).
cmd_handler("print", print_arg_cmd).
cmd_handler("format", format_arg_cmd).
cmd_handler("depth", format_param_arg_cmd("depth")).
cmd_handler("size", format_param_arg_cmd("size")).
cmd_handler("width", format_param_arg_cmd("width")).
cmd_handler("lines", format_param_arg_cmd("lines")).
cmd_handler("actions", num_io_actions_cmd).
% cmd_handler("xml_browser_cmd", set_xml_browser_cmd_cmd).
% cmd_handler("xml_tmp_filename", set_xml_tmp_filename_cmd).
cmd_handler("t", trust_arg_cmd).
cmd_handler("trust", trust_arg_cmd).
cmd_handler("mode", search_mode_cmd).
cmd_handler("m", search_mode_cmd).
cmd_handler("undo", one_word_cmd(user_cmd_undo)).
cmd_handler("params", one_word_cmd(user_cmd_param_command(print_params))).
:- pred one_word_cmd(user_command::in, list(string)::in, user_command::out)
is semidet.
one_word_cmd(Cmd, [], Cmd).
:- pred browse_arg_cmd(list(string)::in, user_command::out) is semidet.
browse_arg_cmd([], user_cmd_browse_arg(no)).
browse_arg_cmd([Arg], BrowseCmd) :-
( string.to_int(Arg, ArgNum) ->
BrowseCmd = user_cmd_browse_arg(yes(ArgNum))
;
( Arg = "-x" ; Arg = "--xml" ),
BrowseCmd = user_cmd_browse_xml_arg(no)
).
browse_arg_cmd(["-x", Arg], user_cmd_browse_xml_arg(yes(ArgNum))) :-
string.to_int(Arg, ArgNum).
browse_arg_cmd(["--xml", Arg], user_cmd_browse_xml_arg(yes(ArgNum))) :-
string.to_int(Arg, ArgNum).
browse_arg_cmd(["io", Arg], user_cmd_browse_io(ArgNum)) :-
string.to_int(Arg, ArgNum).
:- pred print_arg_cmd(list(string)::in, user_command::out) is semidet.
print_arg_cmd([], user_cmd_ask).
print_arg_cmd([Arg], user_cmd_print_arg(From, To)) :-
string_to_range(Arg, From, To).
print_arg_cmd(["io", Arg], user_cmd_print_io(From, To)) :-
string_to_range(Arg, From, To).
:- pred format_arg_cmd(list(string)::in, user_command::out) is semidet.
format_arg_cmd(ArgWords,
user_cmd_param_command(format(MaybeOptionTable, Setting))) :-
ArgWords = [_ | _],
parse.parse(["format" | ArgWords],
param_command(format(MaybeOptionTable, Setting))).
:- pred format_param_arg_cmd(string::in, list(string)::in,
user_command::out) is semidet.
format_param_arg_cmd(Cmd, ArgWords0, Command) :-
( ArgWords0 = ["io" | ArgWords1] ->
ArgWords = ArgWords1,
HasIOArg = yes : bool
;
ArgWords = ArgWords0,
HasIOArg = no : bool
),
ArgWords \= [],
parse.parse([Cmd | ArgWords], ParsedCommand),
ParsedCommand = param_command(format_param(MaybeOptionTable0, Setting)),
(
HasIOArg = yes,
% Since the command was invoked with the `io' argument we want to
% change the settings for the `print all' configuration parameter,
% rather than the ones for `print'.
some [!OptionTable] (
MaybeOptionTable0 = ok(!:OptionTable),
svmap.det_update(set_print, bool(no), !OptionTable),
svmap.det_update(set_print_all, bool(yes), !OptionTable),
MaybeOptionTable = ok(!.OptionTable)
)
;
HasIOArg = no,
MaybeOptionTable = MaybeOptionTable0
),
Command = user_cmd_param_command(format_param(MaybeOptionTable, Setting)).
:- pred num_io_actions_cmd(list(string)::in, user_command::out) is semidet.
num_io_actions_cmd([Arg], user_cmd_param_command(num_io_actions(N))) :-
string.to_int(Arg, N).
% :- func set_xml_browser_cmd_cmd(list(string)::in) = (user_command::out)
% is semidet.
%
% set_xml_browser_cmd_cmd([Arg]) = param_command(xml_browser_cmd(Arg)).
%
% :- func set_xml_tmp_filename_cmd(list(string)::in) = (user_command::out)
% is semidet.
%
% set_xml_tmp_filename_cmd([Arg]) = param_command(xml_tmp_filename(Arg)).
:- pred trust_arg_cmd(list(string)::in, user_command::out) is semidet.
trust_arg_cmd([], user_cmd_trust_predicate).
trust_arg_cmd(["module"], user_cmd_trust_module).
:- pred search_mode_cmd(list(string)::in, user_command::out) is semidet.
search_mode_cmd(["top-down"], user_cmd_change_search(user_top_down)).
search_mode_cmd(["top_down"], user_cmd_change_search(user_top_down)).
search_mode_cmd(["td"], user_cmd_change_search(user_top_down)).
search_mode_cmd(["divide-and-query"],
user_cmd_change_search(user_divide_and_query)).
search_mode_cmd(["divide_and_query"],
user_cmd_change_search(user_divide_and_query)).
search_mode_cmd(["dq"], user_cmd_change_search(user_divide_and_query)).
search_mode_cmd(["binary"], user_cmd_change_search(user_binary)).
search_mode_cmd(["b"], user_cmd_change_search(user_binary)).
search_mode_cmd(["suspicion-divide-and-query"],
user_cmd_change_search(user_suspicion_divide_and_query)).
search_mode_cmd(["suspicion_divide_and_query"],
user_cmd_change_search(user_suspicion_divide_and_query)).
search_mode_cmd(["sdq"],
user_cmd_change_search(user_suspicion_divide_and_query)).
:- pred help_cmd(list(string)::in, user_command::out) is semidet.
help_cmd([], user_cmd_help(no)).
help_cmd([Cmd], user_cmd_help(yes(Cmd))).
:- pred string_to_range(string::in, int::out, int::out) is semidet.
string_to_range(Arg, From, To) :-
( string.to_int(Arg, Num) ->
From = Num,
To = Num
;
[FirstStr, SecondStr] = string.words_separator(is_dash, Arg),
string.to_int(FirstStr, First),
string.to_int(SecondStr, Second),
( First =< Second ->
From = First,
To = Second
;
From = Second,
To = First
)
).
:- pred is_dash(char::in) is semidet.
is_dash('-').
%-----------------------------------------------------------------------------%
user_confirm_bug(Bug, Response, !User, !IO) :-
(
!.User ^ testing = yes,
Response = confirm_bug
;
!.User ^ testing = no,
write_decl_bug(Bug, !.User, !IO),
get_command("Is this a bug? ", Command, !User, !IO),
( Command = user_cmd_yes ->
Response = confirm_bug
; Command = user_cmd_no ->
Response = overrule_bug
; Command = user_cmd_quit ->
Response = abort_diagnosis
; Command = user_cmd_browse_arg(MaybeArgNum) ->
browse_decl_bug(Bug, MaybeArgNum, !User, !IO),
user_confirm_bug(Bug, Response, !User, !IO)
; Command = user_cmd_browse_xml_arg(MaybeArgNum) ->
browse_xml_decl_bug(Bug, MaybeArgNum, !.User, !IO),
user_confirm_bug(Bug, Response, !User, !IO)
; Command = user_cmd_browse_io(ActionNum) ->
decl_bug_io_actions(Bug, MaybeIoActions),
browse_chosen_io_action(MaybeIoActions, ActionNum, _MaybeTrack,
!User, !IO),
user_confirm_bug(Bug, Response, !User, !IO)
;
user_confirm_bug_help(!.User, !IO),
user_confirm_bug(Bug, Response, !User, !IO)
)
).
%-----------------------------------------------------------------------------%
% Returns the caller type we want to use throughout the
% declarative debugger.
%
:- func decl_caller_type = browse_caller_type.
decl_caller_type = print.
% Display the node in user readable form on the current output stream.
%
:- pred write_decl_question(decl_question(T)::in, user_state::in,
io::di, io::uo) is cc_multi.
write_decl_question(wrong_answer(_, _, Atom), User, !IO) :-
write_decl_final_atom(User, "", decl_caller_type, Atom, !IO).
write_decl_question(missing_answer(_, Call, Solns), User, !IO) :-
write_decl_init_atom(User, "Call ", decl_caller_type, Call, !IO),
(
Solns = []
;
Solns = [_ | _],
io.write_string(User ^ outstr, "Solutions:\n", !IO),
list.foldl(write_decl_final_atom(User, "\t", print_all), Solns, !IO)
).
write_decl_question(unexpected_exception(_, Call, ExceptionRep), User, !IO) :-
write_decl_init_atom(User, "Call ", decl_caller_type, Call, !IO),
io.write_string(User ^ outstr, "Throws ", !IO),
term_rep.rep_to_univ(ExceptionRep, Exception),
io.write(User ^ outstr, include_details_cc, univ_value(Exception), !IO),
io.nl(User ^ outstr, !IO).
:- pred write_decl_bug(decl_bug::in, user_state::in, io::di, io::uo)
is cc_multi.
write_decl_bug(e_bug(EBug), User, !IO) :-
(
EBug = incorrect_contour(_, Atom, Contour, _),
io.write_string(User ^ outstr, "Found incorrect contour:\n", !IO),
io.write_list(Contour, "",
write_decl_final_atom(User, "", decl_caller_type), !IO),
write_decl_final_atom(User, "", decl_caller_type, Atom, !IO)
;
EBug = partially_uncovered_atom(Atom, _),
io.write_string(User ^ outstr,
"Found partially uncovered atom:\n", !IO),
write_decl_init_atom(User, "", decl_caller_type, Atom, !IO)
;
EBug = unhandled_exception(Atom, ExceptionRep, _),
io.write_string(User ^ outstr,
"Found unhandled or incorrect exception:\n", !IO),
write_decl_init_atom(User, "", decl_caller_type, Atom, !IO),
term_rep.rep_to_univ(ExceptionRep, Exception),
io.write(User ^ outstr, include_details_cc,
univ_value(Exception), !IO),
io.nl(User ^ outstr, !IO)
).
write_decl_bug(i_bug(IBug), User, !IO) :-
IBug = inadmissible_call(Parent, _, Call, _),
io.write_string(User ^ outstr, "Found inadmissible call:\n", !IO),
write_decl_atom(User, "Parent ", decl_caller_type, init(Parent), !IO),
write_decl_atom(User, "Call ", decl_caller_type, init(Call), !IO).
:- pred write_decl_init_atom(user_state::in, string::in,
browse_caller_type::in, init_decl_atom::in,
io::di, io::uo) is cc_multi.
write_decl_init_atom(User, Indent, CallerType, InitAtom, !IO) :-
write_decl_atom(User, Indent, CallerType, init(InitAtom), !IO).
:- pred write_decl_final_atom(user_state::in, string::in,
browse_caller_type::in, final_decl_atom::in,
io::di, io::uo) is cc_multi.
write_decl_final_atom(User, Indent, CallerType, FinalAtom, !IO) :-
write_decl_atom(User, Indent, CallerType, final(FinalAtom), !IO).
:- pred write_decl_atom(user_state::in, string::in, browse_caller_type::in,
some_decl_atom::in, io::di, io::uo) is cc_multi.
write_decl_atom(User, Indent, CallerType, DeclAtom, !IO) :-
io.write_string(User ^ outstr, Indent, !IO),
unravel_decl_atom(DeclAtom, TraceAtom, MaybeIoActions),
TraceAtom = atom(ProcLayout, Args0),
ProcLabel = get_proc_label_from_layout(ProcLayout),
get_pred_attributes(ProcLabel, _, Functor, _, PredOrFunc),
Which = chosen_head_vars_presentation,
maybe_filter_headvars(Which, Args0, Args1),
list.map(trace_atom_arg_to_univ, Args1, Args),
% Call the term browser to print the atom (or part of it up to
% a size limit) as a goal.
BrowserTerm = synthetic_term_to_browser_term(Functor, Args,
is_function(PredOrFunc)),
browse.print_browser_term(BrowserTerm, User ^ outstr, CallerType,
User ^ browser, !IO),
write_maybe_tabled_io_actions(User, MaybeIoActions, !IO).
:- pred write_maybe_tabled_io_actions(user_state::in,
maybe(io_action_range)::in, io::di, io::uo) is cc_multi.
write_maybe_tabled_io_actions(User, MaybeIoActions, !IO) :-
(
MaybeIoActions = yes(IoActions),
count_tabled_io_actions(IoActions, NumTabled, NumUntabled, !IO),
write_io_actions(User, NumTabled, IoActions, !IO),
( NumUntabled > 0 ->
io.write_string(User ^ outstr, "Warning: some IO " ++
"actions for this atom are not tabled.\n", !IO)
;
true
)
;
MaybeIoActions = no
).
:- pred count_tabled_io_actions(io_action_range::in, int::out, int::out,
io::di, io::uo) is det.
count_tabled_io_actions(io_action_range(Start, End), NumTabled,
NumUntabled, !IO) :-
count_tabled_io_actions_2(Start, End, 0, NumTabled, 0,
NumUntabled, !IO).
:- pred count_tabled_io_actions_2(io_seq_num::in,
io_seq_num::in, int::in, int::out, int::in, int::out, io::di, io::uo)
is det.
count_tabled_io_actions_2(Cur, End, PrevTabled, Tabled,
PrevUntabled, Untabled, !IO) :-
( Cur = End ->
Untabled = PrevUntabled,
Tabled = PrevTabled
;
get_maybe_io_action(Cur, MaybeIoAction, !IO),
(
MaybeIoAction = tabled(_),
NewPrevUntabled = PrevUntabled,
NewPrevTabled = PrevTabled + 1
;
MaybeIoAction = untabled,
NewPrevUntabled = PrevUntabled + 1,
NewPrevTabled = PrevTabled
),
count_tabled_io_actions_2(Cur + 1, End,
NewPrevTabled, Tabled, NewPrevUntabled, Untabled, !IO)
).
:- pred trace_atom_arg_to_univ(trace_atom_arg::in, univ::out) is det.
trace_atom_arg_to_univ(TraceAtomArg, Univ) :-
MaybeUniv = TraceAtomArg ^ arg_value,
(
MaybeUniv = yes(Rep),
term_rep.rep_to_univ(Rep, Univ)
;
MaybeUniv = no,
Univ = univ('_' `with_type` unbound)
).
:- pred write_io_actions(user_state::in, int::in, io_action_range::in,
io::di, io::uo) is cc_multi.
write_io_actions(User, NumTabled, IoActions, !IO) :-
( NumTabled = 0 ->
true
;
( NumTabled = 1 ->
io.write_string(User ^ outstr, "1 tabled IO action:", !IO)
;
io.write_int(User ^ outstr, NumTabled, !IO),
io.write_string(User ^ outstr, " tabled IO actions:", !IO)
),
NumPrinted = get_num_printed_io_actions(User ^ browser),
( NumTabled =< NumPrinted ->
io.nl(User ^ outstr, !IO),
print_tabled_io_actions(User, IoActions, !IO)
;
io.write_string(User ^ outstr, " too many to show", !IO),
io.nl(User ^ outstr, !IO)
)
).
:- pred print_tabled_io_actions(user_state::in, io_action_range::in,
io::di, io::uo) is cc_multi.
print_tabled_io_actions(User, IoActions, !IO) :-
IoActions = io_action_range(Start, End),
print_tabled_io_actions_2(User, Start, End, !IO).
:- pred print_tabled_io_actions_2(user_state::in,
io_seq_num::in, io_seq_num::in, io::di, io::uo) is cc_multi.
print_tabled_io_actions_2(User, Cur, End, !IO) :-
( Cur = End ->
true
;
get_maybe_io_action(Cur, MaybeIoAction, !IO),
print_tabled_io_action(User, MaybeIoAction, !IO),
print_tabled_io_actions_2(User, Cur + 1, End, !IO)
).
:- pred print_tabled_io_action(user_state::in, maybe_tabled_io_action::in,
io::di, io::uo) is cc_multi.
print_tabled_io_action(_, untabled, !IO).
print_tabled_io_action(User, tabled(IoAction), !IO) :-
Term = io_action_to_browser_term(IoAction),
browse.print_browser_term(Term, User ^ outstr, print_all,
User ^ browser, !IO).
%-----------------------------------------------------------------------------%
get_browser_state(User) = User ^ browser.
set_browser_state(Browser, !User) :-
!:User = !.User ^ browser := Browser.
get_user_output_stream(User) = User ^ outstr.
set_user_testing_flag(Testing, User, User ^ testing := Testing).
%-----------------------------------------------------------------------------%
:- pred convert_dirs_to_term_path_from_atom(trace_atom::in,
list(dir)::in(simplified_dirs), term_path::out) is det.
convert_dirs_to_term_path_from_atom(_, [], []).
convert_dirs_to_term_path_from_atom(atom(_, Args), [Dir | Dirs], TermPath) :-
(
Dir = child_num(Pos),
Arg = list.det_index1(Args, Pos),
Arg = arg_info(_, _, MaybeValue)
;
Dir = child_name(Name),
( string_is_return_value_alias(Name) ->
( list.last(Args, LastArg) ->
LastArg = arg_info(_, _, MaybeValue),
Pos = list.length(Args)
;
throw(internal_error("convert_dirs_to_term_path_from_atom",
"argument list empty"))
)
;
throw(internal_error("convert_dirs_to_term_path_from_atom",
"argument of atom cannot be named"))
)
),
(
MaybeValue = yes(TermRep),
convert_dirs_to_term_path(TermRep, Dirs, TermPath0),
TermPath = [Pos | TermPath0]
;
MaybeValue = no,
(
% The user can cd to an unbound argument, but they
% can't cd into subterms of an unbound argument.
(
Dirs = [],
TermPath = [Pos]
;
Dirs = [_ | _],
throw(internal_error("convert_dirs_to_term_path_from_atom",
"no value for first position in path"))
)
)
).
%-----------------------------------------------------------------------------%
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