%% -*- erlang-indent-level: 2 -*-
%%--------------------------------------------------------------------
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2006-2011. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
%%%-------------------------------------------------------------------
%%% File : dialyzer_analysis_callgraph.erl
%%% Author : Tobias Lindahl <[email protected]>
%%% Description :
%%%
%%% Created : 5 Apr 2005 by Tobias Lindahl <[email protected]>
%%%-------------------------------------------------------------------
-module(dialyzer_analysis_callgraph).
-export([start/3]).
-include("dialyzer.hrl").
-record(analysis_state,
{
codeserver :: dialyzer_codeserver:codeserver(),
analysis_type = succ_typings :: anal_type(),
defines = [] :: [dial_define()],
doc_plt :: dialyzer_plt:plt(),
include_dirs = [] :: [file:filename()],
no_warn_unused :: set(),
parent :: pid(),
plt :: dialyzer_plt:plt(),
start_from = byte_code :: start_from(),
use_contracts = true :: boolean()
}).
-record(server_state, {parent :: pid(), legal_warnings :: [dial_warn_tag()]}).
%%--------------------------------------------------------------------
%% Main
%%--------------------------------------------------------------------
-spec start(pid(), [dial_warn_tag()], #analysis{}) -> 'ok'.
start(Parent, LegalWarnings, Analysis) ->
RacesOn = ordsets:is_element(?WARN_RACE_CONDITION, LegalWarnings),
Analysis0 = Analysis#analysis{race_detection = RacesOn},
Analysis1 = expand_files(Analysis0),
Analysis2 = run_analysis(Analysis1),
State = #server_state{parent = Parent, legal_warnings = LegalWarnings},
loop(State, Analysis2, none).
run_analysis(Analysis) ->
Self = self(),
Fun = fun() -> analysis_start(Self, Analysis) end,
Analysis#analysis{analysis_pid = spawn_link(Fun)}.
loop(#server_state{parent = Parent, legal_warnings = LegalWarnings} = State,
#analysis{analysis_pid = AnalPid} = Analysis, ExtCalls) ->
receive
{AnalPid, log, LogMsg} ->
send_log(Parent, LogMsg),
loop(State, Analysis, ExtCalls);
{AnalPid, warnings, Warnings} ->
case filter_warnings(LegalWarnings, Warnings) of
[] -> ok;
SendWarnings ->
send_warnings(Parent, SendWarnings)
end,
loop(State, Analysis, ExtCalls);
{AnalPid, cserver, CServer, Plt} ->
send_codeserver_plt(Parent, CServer, Plt),
loop(State, Analysis, ExtCalls);
{AnalPid, done, Plt, DocPlt} ->
case ExtCalls =:= none of
true ->
send_analysis_done(Parent, Plt, DocPlt);
false ->
send_ext_calls(Parent, ExtCalls),
send_analysis_done(Parent, Plt, DocPlt)
end;
{AnalPid, ext_calls, NewExtCalls} ->
loop(State, Analysis, NewExtCalls);
{AnalPid, ext_types, ExtTypes} ->
send_ext_types(Parent, ExtTypes),
loop(State, Analysis, ExtCalls);
{AnalPid, unknown_behaviours, UnknownBehaviour} ->
send_unknown_behaviours(Parent, UnknownBehaviour),
loop(State, Analysis, ExtCalls);
{AnalPid, mod_deps, ModDeps} ->
send_mod_deps(Parent, ModDeps),
loop(State, Analysis, ExtCalls);
{Parent, stop} ->
exit(AnalPid, kill),
ok
end.
%%--------------------------------------------------------------------
%% The Analysis
%%--------------------------------------------------------------------
analysis_start(Parent, Analysis) ->
CServer = dialyzer_codeserver:new(),
Plt = Analysis#analysis.plt,
State = #analysis_state{codeserver = CServer,
analysis_type = Analysis#analysis.type,
defines = Analysis#analysis.defines,
doc_plt = Analysis#analysis.doc_plt,
include_dirs = Analysis#analysis.include_dirs,
plt = Plt,
parent = Parent,
start_from = Analysis#analysis.start_from,
use_contracts = Analysis#analysis.use_contracts
},
Files = ordsets:from_list(Analysis#analysis.files),
{Callgraph, NoWarn, TmpCServer0} = compile_and_store(Files, State),
%% Remote type postprocessing
NewCServer =
try
NewRecords = dialyzer_codeserver:get_temp_records(TmpCServer0),
NewExpTypes = dialyzer_codeserver:get_temp_exported_types(TmpCServer0),
OldRecords = dialyzer_plt:get_types(Plt),
OldExpTypes0 = dialyzer_plt:get_exported_types(Plt),
MergedRecords = dialyzer_utils:merge_records(NewRecords, OldRecords),
RemMods =
[case Analysis#analysis.start_from of
byte_code -> list_to_atom(filename:basename(F, ".beam"));
src_code -> list_to_atom(filename:basename(F, ".erl"))
end || F <- Files],
OldExpTypes1 = dialyzer_utils:sets_filter(RemMods, OldExpTypes0),
MergedExpTypes = sets:union(NewExpTypes, OldExpTypes1),
TmpCServer1 = dialyzer_codeserver:set_temp_records(MergedRecords, TmpCServer0),
TmpCServer2 =
dialyzer_codeserver:insert_temp_exported_types(MergedExpTypes,
TmpCServer1),
TmpCServer3 = dialyzer_utils:process_record_remote_types(TmpCServer2),
dialyzer_contracts:process_contract_remote_types(TmpCServer3)
catch
throw:{error, _ErrorMsg} = Error -> exit(Error)
end,
NewPlt0 = dialyzer_plt:insert_types(Plt, dialyzer_codeserver:get_records(NewCServer)),
ExpTypes = dialyzer_codeserver:get_exported_types(NewCServer),
NewPlt1 = dialyzer_plt:insert_exported_types(NewPlt0, ExpTypes),
State0 = State#analysis_state{plt = NewPlt1},
dump_callgraph(Callgraph, State0, Analysis),
State1 = State0#analysis_state{codeserver = NewCServer},
State2 = State1#analysis_state{no_warn_unused = NoWarn},
%% Remove all old versions of the files being analyzed
AllNodes = dialyzer_callgraph:all_nodes(Callgraph),
Plt1 = dialyzer_plt:delete_list(NewPlt1, AllNodes),
Exports = dialyzer_codeserver:get_exports(NewCServer),
NewCallgraph =
case Analysis#analysis.race_detection of
true -> dialyzer_callgraph:put_race_detection(true, Callgraph);
false -> Callgraph
end,
State3 = analyze_callgraph(NewCallgraph, State2#analysis_state{plt = Plt1}),
rcv_and_send_ext_types(Parent),
NonExports = sets:subtract(sets:from_list(AllNodes), Exports),
NonExportsList = sets:to_list(NonExports),
Plt2 = dialyzer_plt:delete_list(State3#analysis_state.plt, NonExportsList),
send_codeserver_plt(Parent, CServer, State3#analysis_state.plt),
send_analysis_done(Parent, Plt2, State3#analysis_state.doc_plt).
analyze_callgraph(Callgraph, State) ->
Codeserver = State#analysis_state.codeserver,
Parent = State#analysis_state.parent,
DocPlt = State#analysis_state.doc_plt,
Plt = dialyzer_plt:insert_callbacks(State#analysis_state.plt, Codeserver),
Callgraph1 = dialyzer_callgraph:finalize(Callgraph),
{NewPlt, NewDocPlt} =
case State#analysis_state.analysis_type of
plt_build ->
{dialyzer_succ_typings:analyze_callgraph(Callgraph1, Plt,
Codeserver, Parent),
DocPlt};
succ_typings ->
NoWarn = State#analysis_state.no_warn_unused,
{Warnings, NewPlt0, NewDocPlt0} =
dialyzer_succ_typings:get_warnings(Callgraph1, Plt, DocPlt,
Codeserver, NoWarn, Parent),
send_warnings(State#analysis_state.parent, Warnings),
{NewPlt0, NewDocPlt0}
end,
dialyzer_callgraph:delete(Callgraph1),
State#analysis_state{plt = NewPlt, doc_plt = NewDocPlt}.
%%--------------------------------------------------------------------
%% Build the callgraph and fill the codeserver.
%%--------------------------------------------------------------------
compile_and_store(Files, #analysis_state{codeserver = CServer,
defines = Defs,
include_dirs = Dirs,
parent = Parent,
use_contracts = UseContracts,
start_from = StartFrom
} = State) ->
send_log(Parent, "Reading files and computing callgraph... "),
{T1, _} = statistics(runtime),
Includes = [{i, D} || D <- Dirs],
Defines = [{d, Macro, Val} || {Macro, Val} <- Defs],
Callgraph = dialyzer_callgraph:new(),
Fun = case StartFrom of
src_code ->
fun(File, {TmpCG, TmpCServer, TmpFailed, TmpNoWarn, TmpMods}) ->
case compile_src(File, Includes, Defines, TmpCG,
TmpCServer, UseContracts) of
{error, Reason} ->
{TmpCG, TmpCServer, [{File, Reason}|TmpFailed], TmpNoWarn,
TmpMods};
{ok, NewCG, NoWarn, NewCServer, Mod} ->
{NewCG, NewCServer, TmpFailed, NoWarn++TmpNoWarn,
[Mod|TmpMods]}
end
end;
byte_code ->
fun(File, {TmpCG, TmpCServer, TmpFailed, TmpNoWarn, TmpMods}) ->
case compile_byte(File, TmpCG, TmpCServer, UseContracts) of
{error, Reason} ->
{TmpCG, TmpCServer, [{File, Reason}|TmpFailed], TmpNoWarn,
TmpMods};
{ok, NewCG, NoWarn, NewCServer, Mod} ->
{NewCG, NewCServer, TmpFailed, NoWarn++TmpNoWarn,
[Mod|TmpMods]}
end
end
end,
{NewCallgraph1, NewCServer, Failed, NoWarn, Modules} =
lists:foldl(Fun, {Callgraph, CServer, [], [], []}, Files),
case Failed =:= [] of
true ->
NewFiles = lists:zip(lists:reverse(Modules), Files),
ModDict =
lists:foldl(fun({Mod, F}, Dict) -> dict:append(Mod, F, Dict) end,
dict:new(), NewFiles),
check_for_duplicate_modules(ModDict);
false ->
Msg = io_lib:format("Could not scan the following file(s): ~p",
[lists:flatten(Failed)]),
exit({error, Msg})
end,
{T2, _} = statistics(runtime),
Msg1 = io_lib:format("done in ~.2f secs\nRemoving edges... ", [(T2-T1)/1000]),
send_log(Parent, Msg1),
NewCallgraph2 = cleanup_callgraph(State, NewCServer, NewCallgraph1, Modules),
{T3, _} = statistics(runtime),
Msg2 = io_lib:format("done in ~.2f secs\n", [(T3-T2)/1000]),
send_log(Parent, Msg2),
{NewCallgraph2, sets:from_list(NoWarn), NewCServer}.
cleanup_callgraph(#analysis_state{plt = InitPlt, parent = Parent,
codeserver = CodeServer
},
CServer, Callgraph, Modules) ->
ModuleDeps = dialyzer_callgraph:module_deps(Callgraph),
send_mod_deps(Parent, ModuleDeps),
{Callgraph1, ExtCalls} = dialyzer_callgraph:remove_external(Callgraph),
RelevantAPICalls =
dialyzer_behaviours:get_behaviour_apis([gen_server]),
BehaviourAPICalls = [Call || {_From, To} = Call <- ExtCalls,
lists:member(To, RelevantAPICalls)],
Callgraph2 =
dialyzer_callgraph:put_behaviour_api_calls(BehaviourAPICalls,
Callgraph1),
ExtCalls1 = [Call || Call = {_From, To} <- ExtCalls,
not dialyzer_plt:contains_mfa(InitPlt, To)],
{BadCalls1, RealExtCalls} =
if ExtCalls1 =:= [] -> {[], []};
true ->
ModuleSet = sets:from_list(Modules),
PltModuleSet = dialyzer_plt:all_modules(InitPlt),
AllModules = sets:union(ModuleSet, PltModuleSet),
Pred = fun({_From, {M, _F, _A}}) -> sets:is_element(M, AllModules) end,
lists:partition(Pred, ExtCalls1)
end,
NonLocalCalls = dialyzer_callgraph:non_local_calls(Callgraph1),
BadCalls2 = [Call || Call = {_From, To} <- NonLocalCalls,
not dialyzer_codeserver:is_exported(To, CServer)],
case BadCalls1 ++ BadCalls2 of
[] -> ok;
BadCalls -> send_bad_calls(Parent, BadCalls, CodeServer)
end,
if RealExtCalls =:= [] -> ok;
true ->
send_ext_calls(Parent, lists:usort([To || {_From, To} <- RealExtCalls]))
end,
Callgraph2.
compile_src(File, Includes, Defines, Callgraph, CServer, UseContracts) ->
DefaultIncludes = default_includes(filename:dirname(File)),
SrcCompOpts = dialyzer_utils:src_compiler_opts(),
CompOpts = SrcCompOpts ++ Includes ++ Defines ++ DefaultIncludes,
case dialyzer_utils:get_abstract_code_from_src(File, CompOpts) of
{error, _Msg} = Error -> Error;
{ok, AbstrCode} ->
compile_common(File, AbstrCode, CompOpts, Callgraph, CServer, UseContracts)
end.
compile_byte(File, Callgraph, CServer, UseContracts) ->
case dialyzer_utils:get_abstract_code_from_beam(File) of
error ->
{error, " Could not get abstract code for: " ++ File ++ "\n" ++
" Recompile with +debug_info or analyze starting from source code"};
{ok, AbstrCode} ->
compile_common(File, AbstrCode, [], Callgraph, CServer, UseContracts)
end.
compile_common(File, AbstrCode, CompOpts, Callgraph, CServer, UseContracts) ->
case dialyzer_utils:get_core_from_abstract_code(AbstrCode, CompOpts) of
error -> {error, " Could not get core Erlang code for: " ++ File};
{ok, Core} ->
Mod = cerl:concrete(cerl:module_name(Core)),
NoWarn = abs_get_nowarn(AbstrCode, Mod),
case dialyzer_utils:get_record_and_type_info(AbstrCode) of
{error, _} = Error -> Error;
{ok, RecInfo} ->
CServer1 =
dialyzer_codeserver:store_temp_records(Mod, RecInfo, CServer),
case UseContracts of
true ->
case dialyzer_utils:get_spec_info(Mod, AbstrCode, RecInfo) of
{error, _} = Error -> Error;
{ok, SpecInfo, CallbackInfo} ->
CServer2 =
dialyzer_codeserver:store_temp_contracts(Mod, SpecInfo,
CallbackInfo,
CServer1),
store_core(Mod, Core, NoWarn, Callgraph, CServer2)
end;
false ->
store_core(Mod, Core, NoWarn, Callgraph, CServer1)
end
end
end.
store_core(Mod, Core, NoWarn, Callgraph, CServer) ->
Exp = get_exports_from_core(Core),
OldExpTypes = dialyzer_codeserver:get_temp_exported_types(CServer),
NewExpTypes = get_exported_types_from_core(Core),
MergedExpTypes = sets:union(NewExpTypes, OldExpTypes),
CServer1 = dialyzer_codeserver:insert_exports(Exp, CServer),
CServer2 = dialyzer_codeserver:insert_temp_exported_types(MergedExpTypes,
CServer1),
{LabeledCore, CServer3} = label_core(Core, CServer2),
store_code_and_build_callgraph(Mod, LabeledCore, Callgraph, CServer3, NoWarn).
abs_get_nowarn(Abs, M) ->
Opts = lists:flatten([C || {attribute, _, compile, C} <- Abs]),
Warn = erl_lint:bool_option(warn_unused_function, nowarn_unused_function,
true, Opts),
case Warn of
false ->
[{M, F, A} || {function, _, F, A, _} <- Abs]; % all functions
true ->
OnLoad =
lists:flatten([{M, F, A} || {attribute, _, on_load, {F, A}} <- Abs]),
OnLoad ++ [{M, F, A} ||
{nowarn_unused_function, FAs} <- Opts,
{F, A} <- lists:flatten([FAs])]
end.
get_exported_types_from_core(Core) ->
Attrs = cerl:module_attrs(Core),
ExpTypes1 = [cerl:concrete(L2) || {L1, L2} <- Attrs, cerl:is_literal(L1),
cerl:is_literal(L2),
cerl:concrete(L1) =:= 'export_type'],
ExpTypes2 = lists:flatten(ExpTypes1),
M = cerl:atom_val(cerl:module_name(Core)),
sets:from_list([{M, F, A} || {F, A} <- ExpTypes2]).
get_exports_from_core(Core) ->
Tree = cerl:from_records(Core),
Exports1 = cerl:module_exports(Tree),
Exports2 = [cerl:var_name(V) || V <- Exports1],
M = cerl:atom_val(cerl:module_name(Tree)),
[{M, F, A} || {F, A} <- Exports2].
label_core(Core, CServer) ->
NextLabel = dialyzer_codeserver:get_next_core_label(CServer),
CoreTree = cerl:from_records(Core),
{LabeledTree, NewNextLabel} = cerl_trees:label(CoreTree, NextLabel),
{cerl:to_records(LabeledTree),
dialyzer_codeserver:set_next_core_label(NewNextLabel, CServer)}.
store_code_and_build_callgraph(Mod, Core, Callgraph, CServer, NoWarn) ->
CoreTree = cerl:from_records(Core),
NewCallgraph = dialyzer_callgraph:scan_core_tree(CoreTree, Callgraph),
CServer2 = dialyzer_codeserver:insert(Mod, CoreTree, CServer),
{ok, NewCallgraph, NoWarn, CServer2, Mod}.
%%--------------------------------------------------------------------
%% Utilities
%%--------------------------------------------------------------------
expand_files(Analysis = #analysis{files = Files, start_from = StartFrom}) ->
Ext = case StartFrom of
byte_code -> ".beam";
src_code -> ".erl"
end,
case expand_files(Files, Ext, []) of
[] ->
Msg = "No " ++ Ext ++ " files to analyze" ++
case StartFrom of
byte_code -> " (no --src specified?)";
src_code -> ""
end,
exit({error, Msg});
NewFiles ->
Analysis#analysis{files = NewFiles}
end.
expand_files([File|Left], Ext, FileAcc) ->
case filelib:is_dir(File) of
true ->
{ok, List} = file:list_dir(File),
NewFiles = lists:foldl(fun (X, Acc) ->
case filename:extension(X) =:= Ext of
true -> [filename:join(File, X)|Acc];
false -> Acc
end
end, FileAcc, List),
expand_files(Left, Ext, NewFiles);
false ->
expand_files(Left, Ext, [File|FileAcc])
end;
expand_files([], _Ext, FileAcc) ->
FileAcc.
check_for_duplicate_modules(ModDict) ->
Duplicates = dict:filter(fun(_, [_]) -> false;
(_, _Files) -> true
end, ModDict),
case dict:size(Duplicates) =:= 0 of
true ->
ok;
false ->
Mods = [X || {_, X} <- dict:to_list(Duplicates)],
Msg = io_lib:format("Duplicate modules: ~p", [Mods]),
exit({error, Msg})
end.
default_includes(Dir) ->
L1 = ["..", "../incl", "../inc", "../include"],
[{i, filename:join(Dir, X)} || X <- L1].
%%-------------------------------------------------------------------
%% Handle Messages
%%-------------------------------------------------------------------
rcv_and_send_ext_types(Parent) ->
Self = self(),
Self ! {Self, done},
case rcv_ext_types(Self, []) of
[] -> ok;
ExtTypes -> Parent ! {Self, ext_types, ExtTypes}
end,
ok.
rcv_ext_types(Self, ExtTypes) ->
receive
{Self, ext_types, ExtType} ->
rcv_ext_types(Self, [ExtType|ExtTypes]);
{Self, done} -> lists:usort(ExtTypes)
end.
send_log(Parent, Msg) ->
Parent ! {self(), log, Msg},
ok.
send_warnings(_Parent, []) ->
ok;
send_warnings(Parent, Warnings) ->
Parent ! {self(), warnings, Warnings},
ok.
filter_warnings(LegalWarnings, Warnings) ->
[TIW || {Tag, _Id, _Warning} = TIW <- Warnings,
ordsets:is_element(Tag, LegalWarnings)].
send_analysis_done(Parent, Plt, DocPlt) ->
Parent ! {self(), done, Plt, DocPlt},
ok.
send_ext_calls(Parent, ExtCalls) ->
Parent ! {self(), ext_calls, ExtCalls},
ok.
send_ext_types(Parent, ExtTypes) ->
Parent ! {self(), ext_types, ExtTypes},
ok.
send_unknown_behaviours(Parent, UnknownBehaviours) ->
Parent ! {self(), unknown_behaviours, UnknownBehaviours},
ok.
send_codeserver_plt(Parent, CServer, Plt ) ->
Parent ! {self(), cserver, CServer, Plt},
ok.
send_bad_calls(Parent, BadCalls, CodeServer) ->
send_warnings(Parent, format_bad_calls(BadCalls, CodeServer, [])).
send_mod_deps(Parent, ModuleDeps) ->
Parent ! {self(), mod_deps, ModuleDeps},
ok.
format_bad_calls([{{_, _, _}, {_, module_info, A}}|Left], CodeServer, Acc)
when A =:= 0; A =:= 1 ->
format_bad_calls(Left, CodeServer, Acc);
format_bad_calls([{FromMFA, {M, F, A} = To}|Left], CodeServer, Acc) ->
{_Var, FunCode} = dialyzer_codeserver:lookup_mfa_code(FromMFA, CodeServer),
Msg = {call_to_missing, [M, F, A]},
FileLine = find_call_file_and_line(FunCode, To),
NewAcc = [{?WARN_CALLGRAPH, FileLine, Msg}|Acc],
format_bad_calls(Left, CodeServer, NewAcc);
format_bad_calls([], _CodeServer, Acc) ->
Acc.
find_call_file_and_line(Tree, MFA) ->
Fun =
fun(SubTree, Acc) ->
case cerl:is_c_call(SubTree) of
true ->
M = cerl:call_module(SubTree),
F = cerl:call_name(SubTree),
A = cerl:call_arity(SubTree),
case cerl:is_c_atom(M) andalso cerl:is_c_atom(F) of
true ->
case {cerl:concrete(M), cerl:concrete(F), A} of
MFA ->
Ann = cerl:get_ann(SubTree),
[{get_file(Ann), get_line(Ann)}|Acc];
_ -> Acc
end;
false -> Acc
end;
false -> Acc
end
end,
hd(cerl_trees:fold(Fun, [], Tree)).
get_line([Line|_]) when is_integer(Line) -> Line;
get_line([_|Tail]) -> get_line(Tail);
get_line([]) -> -1.
get_file([{file, File}|_]) -> File;
get_file([_|Tail]) -> get_file(Tail).
-spec dump_callgraph(dialyzer_callgraph:callgraph(), #analysis_state{}, #analysis{}) ->
'ok'.
dump_callgraph(_CallGraph, _State, #analysis{callgraph_file = ""}) -> ok;
dump_callgraph(CallGraph, State, #analysis{callgraph_file = File} = Analysis) ->
Extension = filename:extension(File),
Start_Msg = io_lib:format("Dumping the callgraph... ", []),
send_log(State#analysis_state.parent, Start_Msg),
{T1, _} = statistics(runtime),
dump_callgraph(CallGraph, State, Analysis, Extension),
{T2, _} = statistics(runtime),
Finish_Msg = io_lib:format("done in ~2f secs\n", [(T2-T1)/1000]),
send_log(State#analysis_state.parent, Finish_Msg),
ok.
dump_callgraph(CallGraph, _State, #analysis{callgraph_file = File}, ".dot") ->
dialyzer_callgraph:to_dot(CallGraph, File);
dump_callgraph(CallGraph, _State, #analysis{callgraph_file = File}, ".ps") ->
Args = "-Gratio=compress -Gsize=\"100,100\"",
dialyzer_callgraph:to_ps(CallGraph, File, Args);
dump_callgraph(CallGraph, State, #analysis{callgraph_file = File}, _Ext) ->
case file:open(File, [write]) of
{ok, Fd} ->
io:format(Fd, "~p", [CallGraph]),
ok = file:close(Fd);
{error, Reason} ->
Msg = io_lib:format("Could not open output file ~p, Reason: ~p\n",
[File, Reason]),
send_log(State#analysis_state.parent, Msg)
end.
