aboutsummaryrefslogblamecommitdiffstats
path: root/lib/dialyzer/src/dialyzer_cl.erl
blob: 703eef67ab25a9b28697c011cecd505d279a01c3 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444


                                                                     


                                                        




                                                                      
  



                                                                         
  






















                                                                      
                                                     







                                                                              

                                                              








































































































































































































































































































































































































                                                                               


                                                             






















































































                                                                                  


                                                             



                                                                   

                                                                   



































                                                                                




                                                                           

































                                                                   
                             
                                      


































                                                            





























                                                            


                                                             

                                                          








                                                                      
                                                                       



















                                                                              













































































                                                                            
%% -*- erlang-indent-level: 2 -*-
%%-------------------------------------------------------------------
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2006-2010. 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_cl.erl
%%% Authors : Tobias Lindahl <[email protected]>
%%%           Kostis Sagonas <[email protected]>
%%% Description : The command line interface for the Dialyzer tool.
%%%
%%% Created : 27 Apr 2004 by Tobias Lindahl <[email protected]>
%%%-------------------------------------------------------------------

-module(dialyzer_cl).

-export([start/1]).

-include("dialyzer.hrl").
-include_lib("kernel/include/file.hrl").  % needed for #file_info{}

-record(cl_state,
	{backend_pid                      :: pid(),
	 erlang_mode     = false          :: boolean(),
	 external_calls  = []             :: [mfa()],
         external_types  = []             :: [mfa()],
	 legal_warnings  = ordsets:new()  :: [dial_warn_tag()],
	 mod_deps        = dict:new()     :: dict(),
	 output          = standard_io	  :: io:device(),
	 output_format   = formatted      :: 'raw' | 'formatted',
	 output_plt      = none           :: 'none' | file:filename(),
	 plt_info        = none           :: 'none' | dialyzer_plt:plt_info(),
	 report_mode     = normal         :: rep_mode(),
	 return_status= ?RET_NOTHING_SUSPICIOUS	:: dial_ret(),
	 stored_warnings = []             :: [dial_warning()],
	 unknown_behaviours = []          :: [atom()]
	}).

%%--------------------------------------------------------------------

-spec start(#options{}) -> {dial_ret(), [dial_warning()]}.

start(#options{analysis_type = AnalysisType} = Options) ->
  process_flag(trap_exit, true),
  case AnalysisType of
    plt_check  -> check_plt(Options);
    plt_build  -> build_plt(Options);
    plt_add    -> add_to_plt(Options);
    plt_remove -> remove_from_plt(Options);
    succ_typings -> do_analysis(Options)
  end.

%%--------------------------------------------------------------------

build_plt(Opts) ->
  Opts1 = init_opts_for_build(Opts),
  Files = get_files_from_opts(Opts1),
  Md5 = dialyzer_plt:compute_md5_from_files(Files),
  PltInfo = {Md5, dict:new()},
  do_analysis(Files, Opts1, dialyzer_plt:new(), PltInfo).

init_opts_for_build(Opts) ->
  case Opts#options.output_plt =:= none of
    true ->
      case Opts#options.init_plt of
	none -> Opts#options{init_plt = none, output_plt = get_default_plt()};
	Plt  -> Opts#options{init_plt = none, output_plt = Plt}
      end;
    false -> Opts#options{init_plt = none}
  end.

%%--------------------------------------------------------------------

add_to_plt(Opts) ->
  Opts1 = init_opts_for_add(Opts),
  AddFiles = get_files_from_opts(Opts1),
  plt_common(Opts1, [], AddFiles).

init_opts_for_add(Opts) ->
  case Opts#options.output_plt =:= none of
    true ->
      case Opts#options.init_plt of
	none -> Opts#options{output_plt = get_default_plt(),
			     init_plt = get_default_plt()};
	Plt  -> Opts#options{output_plt = Plt}
      end;
    false ->
      case Opts#options.init_plt =:= none of
	true  -> Opts#options{init_plt = get_default_plt()};
	false -> Opts
      end
  end.

%%--------------------------------------------------------------------

check_plt(Opts) ->
  Opts1 = init_opts_for_check(Opts),
  report_check(Opts),
  plt_common(Opts1, [], []).

init_opts_for_check(Opts) ->
  Plt =
    case Opts#options.init_plt of
      none -> get_default_plt();
      Plt0 -> Plt0
    end,
  Opts#options{files         = [],
	       files_rec     = [],
	       analysis_type = plt_check,
	       defines       = [],
	       from          = byte_code,
	       init_plt      = Plt,
	       include_dirs  = [],
	       output_plt    = Plt,
	       use_contracts = true
	      }.

%%--------------------------------------------------------------------

remove_from_plt(Opts) ->
  Opts1 = init_opts_for_remove(Opts),
  Files = get_files_from_opts(Opts1),
  plt_common(Opts1, Files, []).

init_opts_for_remove(Opts) ->
  case Opts#options.output_plt =:= none of
    true ->
      case Opts#options.init_plt of
	none -> Opts#options{output_plt = get_default_plt(),
			     init_plt = get_default_plt()};
	Plt  -> Opts#options{output_plt = Plt}
      end;
    false ->
      case Opts#options.init_plt =:= none of
	true  -> Opts#options{init_plt = get_default_plt()};
	false -> Opts
      end
  end.

%%--------------------------------------------------------------------

plt_common(Opts, RemoveFiles, AddFiles) ->
  case check_plt(Opts, RemoveFiles, AddFiles) of
    ok ->
      case Opts#options.report_mode of
	quiet -> ok;
	_ -> io:put_chars(" yes\n")
      end,
      {?RET_NOTHING_SUSPICIOUS, []};
    {old_version, Md5} ->
      PltInfo = {Md5, dict:new()},
      Files = [F || {F, _} <- Md5],
      do_analysis(Files, Opts, dialyzer_plt:new(), PltInfo);
    {differ, Md5, DiffMd5, ModDeps} ->
      report_failed_plt_check(Opts, DiffMd5),
      {AnalFiles, RemovedMods, ModDeps1} = 
	expand_dependent_modules(Md5, DiffMd5, ModDeps),
      Plt = clean_plt(Opts#options.init_plt, RemovedMods),
      case AnalFiles =:= [] of
	true ->
	  %% Only removed stuff. Just write the PLT.
	  dialyzer_plt:to_file(Opts#options.output_plt, Plt, ModDeps, 
			       {Md5, ModDeps}),
	  {?RET_NOTHING_SUSPICIOUS, []};
	false ->
	  do_analysis(AnalFiles, Opts, Plt, {Md5, ModDeps1})
      end;
    {error, no_such_file} ->
      Msg = io_lib:format("Could not find the PLT: ~s\n~s",
			  [Opts#options.init_plt, default_plt_error_msg()]),
      error(Msg);
    {error, not_valid} ->
      Msg = io_lib:format("The file: ~s is not a valid PLT file\n~s",
			  [Opts#options.init_plt, default_plt_error_msg()]),
      error(Msg);
    {error, read_error} ->
      Msg = io_lib:format("Could not read the PLT: ~s\n~s",
			  [Opts#options.init_plt, default_plt_error_msg()]),
      error(Msg);
    {error, {no_file_to_remove, F}} ->
      Msg = io_lib:format("Could not remove the file ~s from the PLT: ~s\n",
			  [F, Opts#options.init_plt]),
      error(Msg)
  end.

default_plt_error_msg() ->
  "Use the options:\n"
    "   --build_plt   to build a new PLT; or\n"
    "   --add_to_plt  to add to an existing PLT\n"
    "\n"
    "For example, use a command like the following:\n"
    "   dialyzer --build_plt --apps erts kernel stdlib mnesia\n"
    "Note that building a PLT such as the above may take 20 mins or so\n"
    "\n"
    "If you later need information about other applications, say crypto,\n"
    "you can extend the PLT by the command:\n"
    "  dialyzer --add_to_plt --apps crypto\n"
    "For applications that are not in Erlang/OTP use an absolute file name.\n".

%%--------------------------------------------------------------------

check_plt(Opts, RemoveFiles, AddFiles) ->
  Plt = Opts#options.init_plt,
  case dialyzer_plt:check_plt(Plt, RemoveFiles, AddFiles) of
    {old_version, _MD5} = OldVersion ->
      report_old_version(Opts),
      OldVersion;
    {differ, _MD5, _DiffMd5, _ModDeps} = Differ ->
      Differ;
    ok ->
      ok;
    {error, _Reason} = Error ->
      Error
  end.

%%--------------------------------------------------------------------

report_check(#options{report_mode = ReportMode, init_plt = InitPlt}) ->
  case ReportMode of
    quiet -> ok;
    _ ->
      io:format("  Checking whether the PLT ~s is up-to-date...", [InitPlt])
  end.

report_old_version(#options{report_mode = ReportMode, init_plt = InitPlt}) ->
  case ReportMode of
    quiet -> ok;
    _ ->
      io:put_chars(" no\n"),
      io:format("    (the PLT ~s was built with an old version of Dialyzer)\n",
		[InitPlt])
  end.

report_failed_plt_check(#options{analysis_type = AnalType, 
				 report_mode = ReportMode}, DiffMd5) ->
  case AnalType =:= plt_check of
    true ->
      case ReportMode of
	quiet -> ok;
	normal -> io:format(" no\n", []);
	verbose -> report_md5_diff(DiffMd5)
      end;
    false -> ok
  end.

report_analysis_start(#options{analysis_type = Type,
			       report_mode = ReportMode,
			       init_plt = InitPlt, 
			       output_plt = OutputPlt}) ->
  case ReportMode of
    quiet -> ok;
    _ ->
      io:format("  "),
      case Type of
	plt_add ->
	  case InitPlt =:= OutputPlt of
	    true -> io:format("Adding information to ~s...", [OutputPlt]);
	    false -> io:format("Adding information from ~s to ~s...", 
			       [InitPlt, OutputPlt])
	  end;
	plt_build ->
	  io:format("Creating PLT ~s ...", [OutputPlt]);
	plt_check ->
	  io:format("Rebuilding the information in ~s...", [OutputPlt]);
	plt_remove ->
	  case InitPlt =:= OutputPlt of
	    true -> io:format("Removing information from ~s...", [OutputPlt]);
	    false -> io:format("Removing information from ~s to ~s...", 
			       [InitPlt, OutputPlt])
	  end;
	succ_typings -> io:format("Proceeding with analysis...")
      end
  end.

report_native_comp(#options{report_mode = ReportMode}) ->
  case ReportMode of
    quiet -> ok;
    _ -> io:format("  Compiling some key modules to native code...")
  end.

report_elapsed_time(T1, T2, #options{report_mode = ReportMode}) ->
  case ReportMode of
    quiet -> ok;
    _ ->
      ElapsedTime = T2 - T1,
      Mins = ElapsedTime div 60000,
      Secs = (ElapsedTime rem 60000) / 1000,
      io:format(" done in ~wm~.2fs\n", [Mins, Secs])
  end.

report_md5_diff(List) ->
  io:format("    The PLT information is not up to date:\n", []),
  case [Mod || {removed, Mod} <- List] of
    [] -> ok;
    RemovedMods -> io:format("    Removed modules: ~p\n", [RemovedMods])
  end,
  case [Mod || {differ, Mod} <- List] of
    [] -> ok;
    ChangedMods -> io:format("    Changed modules: ~p\n", [ChangedMods])
  end.

%%--------------------------------------------------------------------

get_default_plt() ->
  dialyzer_plt:get_default_plt().

%%--------------------------------------------------------------------

do_analysis(Options) ->
  Files = get_files_from_opts(Options),
  case Options#options.init_plt of
    none -> do_analysis(Files, Options, dialyzer_plt:new(), none);
    File -> do_analysis(Files, Options, dialyzer_plt:from_file(File), none)
  end.
  
do_analysis(Files, Options, Plt, PltInfo) ->
  assert_writable(Options#options.output_plt),
  hipe_compile(Files, Options),
  report_analysis_start(Options),
  State0 = new_state(),
  State1 = init_output(State0, Options),
  State2 = State1#cl_state{legal_warnings = Options#options.legal_warnings,
			   output_plt = Options#options.output_plt,
			   plt_info = PltInfo,
			   erlang_mode = Options#options.erlang_mode,
			   report_mode = Options#options.report_mode},
  AnalysisType = convert_analysis_type(Options#options.analysis_type,
				       Options#options.get_warnings),
  InitAnalysis = #analysis{type = AnalysisType,
			   defines = Options#options.defines,
			   include_dirs = Options#options.include_dirs,
			   files = Files,
			   start_from = Options#options.from, 
			   plt = Plt,
			   use_contracts = Options#options.use_contracts,
			   callgraph_file = Options#options.callgraph_file},
  State3 = start_analysis(State2, InitAnalysis),
  {T1, _} = statistics(wall_clock),
  Return = cl_loop(State3),
  {T2, _} = statistics(wall_clock),
  report_elapsed_time(T1, T2, Options),
  Return.

convert_analysis_type(plt_check, true)   -> succ_typings;
convert_analysis_type(plt_check, false)  -> plt_build;
convert_analysis_type(plt_add, true)     -> succ_typings;
convert_analysis_type(plt_add, false)    -> plt_build;
convert_analysis_type(plt_build, true)   -> succ_typings;
convert_analysis_type(plt_build, false)  -> plt_build;
convert_analysis_type(plt_remove, true)  -> succ_typings;
convert_analysis_type(plt_remove, false) -> plt_build;
convert_analysis_type(succ_typings, _)   -> succ_typings.

%%--------------------------------------------------------------------

assert_writable(none) ->
  ok;
assert_writable(PltFile) ->
  case check_if_writable(PltFile) of
    true -> ok;
    false ->
      Msg = io_lib:format("    The PLT file ~s is not writable", [PltFile]),
      error(Msg)
  end.

check_if_writable(PltFile) ->
  case filelib:is_regular(PltFile) of
    true -> is_writable_file_or_dir(PltFile);
    false ->
      case filelib:is_dir(PltFile) of
	true -> false;
	false ->
	  DirName = filename:dirname(PltFile),
	  filelib:is_dir(DirName) andalso is_writable_file_or_dir(DirName)
      end
  end.

is_writable_file_or_dir(PltFile) ->
  case file:read_file_info(PltFile) of
    {ok, #file_info{access = A}} ->
      (A =:= write) orelse (A =:= read_write);
    {error, _} ->
      false
  end.

%%--------------------------------------------------------------------

clean_plt(PltFile, RemovedMods) ->
  %% Clean the plt from the removed modules.
  Plt = dialyzer_plt:from_file(PltFile),
  sets:fold(fun(M, AccPlt) -> dialyzer_plt:delete_module(AccPlt, M) end,
	    Plt, RemovedMods).

expand_dependent_modules(Md5, DiffMd5, ModDeps) ->
  ChangedMods = sets:from_list([M || {differ, M} <- DiffMd5]),
  RemovedMods = sets:from_list([M || {removed, M} <- DiffMd5]),
  BigSet = sets:union(ChangedMods, RemovedMods),
  BigList = sets:to_list(BigSet),
  ExpandedSet = expand_dependent_modules_1(BigList, BigSet, ModDeps),
  NewModDeps = dialyzer_callgraph:strip_module_deps(ModDeps, BigSet),
  AnalyzeMods = sets:subtract(ExpandedSet, RemovedMods),  
  FilterFun = fun(File) ->
		  Mod = list_to_atom(filename:basename(File, ".beam")),
		  sets:is_element(Mod, AnalyzeMods)
	      end,
  {[F || {F, _} <- Md5, FilterFun(F)], RemovedMods, NewModDeps}.

expand_dependent_modules_1([Mod|Mods], Included, ModDeps) ->
  case dict:find(Mod, ModDeps) of
    {ok, Deps} ->
      NewDeps = sets:subtract(sets:from_list(Deps), Included), 
      case sets:size(NewDeps) =:= 0 of
	true -> expand_dependent_modules_1(Mods, Included, ModDeps);
	false -> 
	  NewIncluded = sets:union(Included, NewDeps),
	  expand_dependent_modules_1(sets:to_list(NewDeps) ++ Mods, 
				     NewIncluded, ModDeps)
      end;
    error ->
      expand_dependent_modules_1(Mods, Included, ModDeps)
  end;
expand_dependent_modules_1([], Included, _ModDeps) ->
  Included.

-define(MIN_FILES_FOR_NATIVE_COMPILE, 20).

-spec hipe_compile([file:filename()], #options{}) -> 'ok'.

hipe_compile(Files, #options{erlang_mode = ErlangMode} = Options) ->
  NoNative = (get(dialyzer_options_native) =:= false),
  FewFiles = (length(Files) < ?MIN_FILES_FOR_NATIVE_COMPILE),
  case NoNative orelse FewFiles orelse ErlangMode of
    true -> ok;
    false ->
      case erlang:system_info(hipe_architecture) of
	undefined -> ok;
	_ ->
	  Mods = [lists, dict, gb_sets, gb_trees, ordsets, sets,
		  cerl, cerl_trees, erl_types, erl_bif_types,
		  dialyzer_analysis_callgraph, dialyzer_codeserver,
		  dialyzer_dataflow, dialyzer_dep, dialyzer_plt,
		  dialyzer_succ_typings, dialyzer_typesig],
	  report_native_comp(Options),
	  {T1, _} = statistics(wall_clock),
	  native_compile(Mods),
	  {T2, _} = statistics(wall_clock),
	  report_elapsed_time(T1, T2, Options)
      end
  end.

native_compile(Mods) ->
  case erlang:system_info(schedulers) of
    %% N when N > 1 ->
    %%   Parent = self(),
    %%   Pids = [spawn(fun () -> Parent ! {self(), hc(M)} end) || M <- Mods],
    %%   lists:foreach(fun (Pid) -> receive {Pid, Res} -> Res end end, Pids);
    _ -> % 1 ->
      lists:foreach(fun (Mod) -> hc(Mod) end, Mods)
  end.

hc(Mod) ->
  case code:ensure_loaded(Mod) of
    {module, Mod} -> ok;
    {error, sticky_directory} -> ok
  end,
  case code:is_module_native(Mod) of
    true -> ok;
    false ->
      {ok, Mod} = hipe:c(Mod),
      ok
  end.

new_state() ->
  #cl_state{}.

init_output(State0, #options{output_file = OutFile, output_format = OutFormat}) ->
  State = State0#cl_state{output_format = OutFormat},
  case OutFile =:= none of
    true ->
      State;
    false ->
      case file:open(OutFile, [write]) of
	{ok, File} ->
	  State#cl_state{output = File};
	{error, Reason} ->
	  Msg = io_lib:format("Could not open output file ~p, Reason: ~p\n",
			      [OutFile, Reason]),
	  error(State, lists:flatten(Msg))
      end
  end.

-spec maybe_close_output_file(#cl_state{}) -> 'ok'.

maybe_close_output_file(State) ->
  case State#cl_state.output of
    standard_io -> ok;
    File -> ok = file:close(File)
  end.

%% ----------------------------------------------------------------
%%
%%  Main Loop
%%

-define(LOG_CACHE_SIZE, 10).

%%-spec cl_loop(#cl_state{}) -> 
cl_loop(State) ->
  cl_loop(State, []).

cl_loop(State, LogCache) ->
  BackendPid = State#cl_state.backend_pid,
  receive
    {BackendPid, log, LogMsg} ->
      %%io:format(State#cl_state.output ,"Log: ~s\n", [LogMsg]),
      cl_loop(State, lists:sublist([LogMsg|LogCache], ?LOG_CACHE_SIZE));
    {BackendPid, warnings, Warnings} ->
      NewState = store_warnings(State, Warnings),
      cl_loop(NewState, LogCache);
    {BackendPid, unknown_behaviours, Behaviours} ->
      NewState = store_unknown_behaviours(State, Behaviours),
      cl_loop(NewState, LogCache);
    {BackendPid, done, NewPlt, _NewDocPlt} ->
      return_value(State, NewPlt);
    {BackendPid, ext_calls, ExtCalls} ->
      cl_loop(State#cl_state{external_calls = ExtCalls}, LogCache);
    {BackendPid, ext_types, ExtTypes} ->
      cl_loop(State#cl_state{external_types = ExtTypes}, LogCache);
    {BackendPid, mod_deps, ModDeps} ->
      NewState = State#cl_state{mod_deps = ModDeps},
      cl_loop(NewState, LogCache);
    {'EXIT', BackendPid, {error, Reason}} ->
      Msg = failed_anal_msg(Reason, LogCache),
      error(State, Msg);
    {'EXIT', BackendPid, Reason} when Reason =/= 'normal' ->
      Msg = failed_anal_msg(io_lib:format("~P", [Reason, 12]), LogCache),
      error(State, Msg);
    _Other ->
      %% io:format("Received ~p\n", [_Other]),
      cl_loop(State, LogCache)
  end.

-spec failed_anal_msg(string(), [_]) -> string().

failed_anal_msg(Reason, LogCache) ->
  Msg = "Analysis failed with error: " ++ Reason ++ "\n",
  case LogCache =:= [] of
    true -> Msg;
    false ->
      Msg ++ "Last messages in the log cache:\n  " ++ format_log_cache(LogCache)
  end.

%%
%% formats the log cache (treating it as a string) for pretty-printing
%%
format_log_cache(LogCache) ->
  Str = lists:append(lists:reverse(LogCache)),
  string:join(string:tokens(Str, "\n"), "\n  ").

-spec store_warnings(#cl_state{}, [dial_warning()]) -> #cl_state{}.

store_warnings(#cl_state{stored_warnings = StoredWarnings} = St, Warnings) ->
  St#cl_state{stored_warnings = StoredWarnings ++ Warnings}.

-spec store_unknown_behaviours(#cl_state{}, [_]) -> #cl_state{}.

store_unknown_behaviours(#cl_state{unknown_behaviours = Behs} = St, Beh) ->
  St#cl_state{unknown_behaviours = Beh ++ Behs}.

-spec error(string()) -> no_return().

error(Msg) ->
  throw({dialyzer_error, Msg}).

-spec error(#cl_state{}, string()) -> no_return().

error(State, Msg) ->
  case State#cl_state.output of
    standard_io -> ok;
    Outfile -> io:format(Outfile, "\n~s\n", [Msg])
  end,
  maybe_close_output_file(State),
  throw({dialyzer_error, Msg}).

return_value(State = #cl_state{erlang_mode = ErlangMode,
			       mod_deps = ModDeps,
			       output_plt = OutputPlt,
			       plt_info = PltInfo,
			       stored_warnings = StoredWarnings},
	     Plt) ->
  case OutputPlt =:= none of
    true -> ok;
    false -> dialyzer_plt:to_file(OutputPlt, Plt, ModDeps, PltInfo)
  end,
  RetValue =
    case StoredWarnings =:= [] of
      true -> ?RET_NOTHING_SUSPICIOUS;
      false -> ?RET_DISCREPANCIES
    end,
  case ErlangMode of
    false ->
      print_warnings(State),
      print_ext_calls(State),
      print_ext_types(State),
      print_unknown_behaviours(State),
      maybe_close_output_file(State),
      {RetValue, []};
    true -> 
      {RetValue, process_warnings(StoredWarnings)}
  end.

print_ext_calls(#cl_state{report_mode = quiet}) ->
  ok;
print_ext_calls(#cl_state{output = Output,
			  external_calls = Calls,
			  stored_warnings = Warnings,
			  output_format = Format}) ->
  case Calls =:= [] of
    true -> ok;
    false ->
      case Warnings =:= [] of
	true -> io:nl(Output); %% Need to do a newline first
	false -> ok
      end,
      case Format of
	formatted ->
	  io:put_chars(Output, "Unknown functions:\n"),
	  do_print_ext_calls(Output, Calls, "  ");
	raw ->
	  io:put_chars(Output, "%% Unknown functions:\n"),
	  do_print_ext_calls(Output, Calls, "%%  ")
      end
  end.

do_print_ext_calls(Output, [{M,F,A}|T], Before) ->
  io:format(Output, "~s~p:~p/~p\n", [Before,M,F,A]),
  do_print_ext_calls(Output, T, Before);
do_print_ext_calls(_, [], _) ->
  ok.

print_ext_types(#cl_state{report_mode = quiet}) ->
  ok;
print_ext_types(#cl_state{output = Output,
                          external_calls = Calls,
                          external_types = Types,
                          stored_warnings = Warnings,
                          output_format = Format}) ->
  case Types =:= [] of
    true -> ok;
    false ->
      case Warnings =:= [] andalso Calls =:= [] of
        true -> io:nl(Output); %% Need to do a newline first
        false -> ok
      end,
      case Format of
        formatted ->
          io:put_chars(Output, "Unknown types:\n"),
          do_print_ext_types(Output, Types, "  ");
        raw ->
          io:put_chars(Output, "%% Unknown functions:\n"),
          do_print_ext_types(Output, Types, "%%  ")
      end
  end.

do_print_ext_types(Output, [{M,F,A}|T], Before) ->
  io:format(Output, "~s~p:~p/~p\n", [Before,M,F,A]),
  do_print_ext_types(Output, T, Before);
do_print_ext_types(_, [], _) ->
  ok.

%%print_unknown_behaviours(#cl_state{report_mode = quiet}) ->
%%  ok;
print_unknown_behaviours(#cl_state{output = Output,
                                   external_calls = Calls,
				   external_types = Types,
				   stored_warnings = Warnings,
				   unknown_behaviours = DupBehaviours,
				   legal_warnings = LegalWarnings,
				   output_format = Format}) ->
  case ordsets:is_element(?WARN_BEHAVIOUR, LegalWarnings)
    andalso DupBehaviours =/= [] of
    false -> ok;
    true ->
      Behaviours = lists:usort(DupBehaviours),
      case Warnings =:= [] andalso Calls =:= [] andalso Types =:= [] of
	true -> io:nl(Output); %% Need to do a newline first
	false -> ok
      end,
      case Format of
	formatted ->
	  io:put_chars(Output, "Unknown behaviours (behaviour_info(callbacks)"
		       " does not return any specs):\n"),
	  do_print_unknown_behaviours(Output, Behaviours, "  ");
	raw ->
	  io:put_chars(Output, "%% Unknown behaviours:\n"),
	  do_print_unknown_behaviours(Output, Behaviours, "%%  ")
      end
  end.

do_print_unknown_behaviours(Output, [B|T], Before) ->
  io:format(Output, "~s~p\n", [Before,B]),
  do_print_unknown_behaviours(Output, T, Before);
do_print_unknown_behaviours(_, [], _) ->
  ok.

print_warnings(#cl_state{stored_warnings = []}) ->
  ok;
print_warnings(#cl_state{output = Output,
			 output_format = Format,
			 stored_warnings = Warnings}) ->
  PrWarnings = process_warnings(Warnings),
  case PrWarnings of
    [] -> ok;
    [_|_] ->
      S = case Format of
	    formatted ->
	      [dialyzer:format_warning(W) || W <- PrWarnings];
	    raw ->
	      [io_lib:format("~p. \n", [W]) || W <- PrWarnings]
	  end,
      io:format(Output, "\n~s", [S])
  end.

-spec process_warnings([dial_warning()]) -> [dial_warning()].
  
process_warnings(Warnings) ->
  Warnings1 = lists:keysort(2, Warnings), %% Sort on file/line
  remove_duplicate_warnings(Warnings1, []).

remove_duplicate_warnings([Duplicate, Duplicate|Left], Acc) ->
  remove_duplicate_warnings([Duplicate|Left], Acc);
remove_duplicate_warnings([NotDuplicate|Left], Acc) ->
  remove_duplicate_warnings(Left, [NotDuplicate|Acc]);
remove_duplicate_warnings([], Acc) ->
  lists:reverse(Acc).

get_files_from_opts(Options) ->
  From = Options#options.from,
  Files1 = add_files(Options#options.files, From),
  Files2 = add_files_rec(Options#options.files_rec, From),
  ordsets:union(Files1, Files2).

add_files_rec(Files, From) ->
  add_files(Files, From, true).

add_files(Files, From) ->
  add_files(Files, From, false).

add_files(Files, From, Rec) ->
  Files1 = [filename:absname(F) || F <- Files],
  Files2 = ordsets:from_list(Files1), 
  Dirs = ordsets:filter(fun(X) -> filelib:is_dir(X) end, Files2),
  Files3 = ordsets:subtract(Files2, Dirs),
  Extension = case From of
		byte_code -> ".beam";
		src_code -> ".erl"
	      end,
  Fun = add_file_fun(Extension),
  lists:foldl(fun(Dir, Acc) ->
		  filelib:fold_files(Dir, Extension, Rec, Fun, Acc)
	      end, Files3, Dirs).

add_file_fun(Extension) ->
  fun(File, AccFiles) ->
      case filename:extension(File) =:= Extension of
	true ->
	  AbsName = filename:absname(File),
	  ordsets:add_element(AbsName, AccFiles);
	false -> AccFiles
      end
  end.

-spec start_analysis(#cl_state{}, #analysis{}) -> #cl_state{}.

start_analysis(State, Analysis) ->
  Self = self(),
  LegalWarnings = State#cl_state.legal_warnings,
  Fun = fun() -> 
	    dialyzer_analysis_callgraph:start(Self, LegalWarnings, Analysis)
	end,
  BackendPid = spawn_link(Fun),
  State#cl_state{backend_pid = BackendPid}.