1 /* Language-independent diagnostic subroutines for the GNU Compiler Collection
2 Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
3 2009 Free Software Foundation, Inc.
4 Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
23 /* This file implements the language independent aspect of diagnostic
27 #undef FLOAT /* This is for hpux. They should change hpux. */
28 #undef FFS /* Some systems define this in param.h. */
30 #include "coretypes.h"
39 #include "diagnostic.h"
40 #include "langhooks.h"
41 #include "langhooks-def.h"
45 #define pedantic_warning_kind() (flag_pedantic_errors ? DK_ERROR : DK_WARNING)
46 #define permissive_error_kind() (flag_permissive ? DK_WARNING : DK_ERROR)
49 static char *build_message_string (const char *, ...) ATTRIBUTE_PRINTF_1;
51 static void default_diagnostic_starter (diagnostic_context *,
53 static void default_diagnostic_finalizer (diagnostic_context *,
56 static void error_recursion (diagnostic_context *) ATTRIBUTE_NORETURN;
58 static void diagnostic_action_after_output (diagnostic_context *,
60 static void real_abort (void) ATTRIBUTE_NORETURN;
62 /* A diagnostic_context surrogate for stderr. */
63 static diagnostic_context global_diagnostic_context;
64 diagnostic_context *global_dc = &global_diagnostic_context;
67 /* Return a malloc'd string containing MSG formatted a la printf. The
68 caller is responsible for freeing the memory. */
70 build_message_string (const char *msg, ...)
76 vasprintf (&str, msg, ap);
82 /* Same as diagnostic_build_prefix, but only the source FILE is given. */
84 file_name_as_prefix (const char *f)
86 return build_message_string ("%s: ", f);
91 /* Initialize the diagnostic message outputting machinery. */
93 diagnostic_initialize (diagnostic_context *context)
95 /* Allocate a basic pretty-printer. Clients will replace this a
96 much more elaborated pretty-printer if they wish. */
97 context->printer = XNEW (pretty_printer);
98 pp_construct (context->printer, NULL, 0);
99 /* By default, diagnostics are sent to stderr. */
100 context->printer->buffer->stream = stderr;
101 /* By default, we emit prefixes once per message. */
102 context->printer->wrapping.rule = DIAGNOSTICS_SHOW_PREFIX_ONCE;
104 memset (context->diagnostic_count, 0, sizeof context->diagnostic_count);
105 context->issue_warnings_are_errors_message = true;
106 context->warning_as_error_requested = false;
107 memset (context->classify_diagnostic, DK_UNSPECIFIED,
108 sizeof context->classify_diagnostic);
109 context->show_option_requested = false;
110 context->abort_on_error = false;
111 context->internal_error = NULL;
112 diagnostic_starter (context) = default_diagnostic_starter;
113 diagnostic_finalizer (context) = default_diagnostic_finalizer;
114 context->last_module = 0;
115 context->last_function = NULL;
119 /* Initialize DIAGNOSTIC, where the message MSG has already been
122 diagnostic_set_info_translated (diagnostic_info *diagnostic, const char *msg,
123 va_list *args, location_t location,
126 diagnostic->message.err_no = errno;
127 diagnostic->message.args_ptr = args;
128 diagnostic->message.format_spec = msg;
129 diagnostic->location = location;
130 diagnostic->override_column = 0;
131 diagnostic->kind = kind;
132 diagnostic->option_index = 0;
135 /* Initialize DIAGNOSTIC, where the message GMSGID has not yet been
138 diagnostic_set_info (diagnostic_info *diagnostic, const char *gmsgid,
139 va_list *args, location_t location,
142 diagnostic_set_info_translated (diagnostic, _(gmsgid), args, location, kind);
145 /* Return a malloc'd string describing a location. The caller is
146 responsible for freeing the memory. */
148 diagnostic_build_prefix (diagnostic_info *diagnostic)
150 static const char *const diagnostic_kind_text[] = {
151 #define DEFINE_DIAGNOSTIC_KIND(K, T) (T),
152 #include "diagnostic.def"
153 #undef DEFINE_DIAGNOSTIC_KIND
156 const char *text = _(diagnostic_kind_text[diagnostic->kind]);
157 expanded_location s = expand_location (diagnostic->location);
158 if (diagnostic->override_column)
159 s.column = diagnostic->override_column;
160 gcc_assert (diagnostic->kind < DK_LAST_DIAGNOSTIC_KIND);
164 ? build_message_string ("%s: %s", progname, text)
166 ? build_message_string ("%s:%d:%d: %s", s.file, s.line, s.column, text)
167 : build_message_string ("%s:%d: %s", s.file, s.line, text));
170 /* Take any action which is expected to happen after the diagnostic
171 is written out. This function does not always return. */
173 diagnostic_action_after_output (diagnostic_context *context,
174 diagnostic_info *diagnostic)
176 switch (diagnostic->kind)
186 if (context->abort_on_error)
188 if (flag_fatal_errors)
190 fnotice (stderr, "compilation terminated due to -Wfatal-errors.\n");
191 exit (FATAL_EXIT_CODE);
196 if (context->abort_on_error)
199 fnotice (stderr, "Please submit a full bug report,\n"
200 "with preprocessed source if appropriate.\n"
201 "See %s for instructions.\n", bug_report_url);
202 exit (ICE_EXIT_CODE);
205 if (context->abort_on_error)
208 fnotice (stderr, "compilation terminated.\n");
209 exit (FATAL_EXIT_CODE);
216 /* Prints out, if necessary, the name of the current function
217 that caused an error. Called from all error and warning functions. */
219 diagnostic_report_current_function (diagnostic_context *context,
220 diagnostic_info *diagnostic)
222 diagnostic_report_current_module (context);
223 lang_hooks.print_error_function (context, input_filename, diagnostic);
227 diagnostic_report_current_module (diagnostic_context *context)
229 const struct line_map *map;
231 if (pp_needs_newline (context->printer))
233 pp_newline (context->printer);
234 pp_needs_newline (context->printer) = false;
237 if (input_location <= BUILTINS_LOCATION)
240 map = linemap_lookup (line_table, input_location);
241 if (map && diagnostic_last_module_changed (context, map))
243 diagnostic_set_last_module (context, map);
244 if (! MAIN_FILE_P (map))
246 map = INCLUDED_FROM (line_table, map);
247 if (flag_show_column)
248 pp_verbatim (context->printer,
249 "In file included from %s:%d:%d",
251 LAST_SOURCE_LINE (map), LAST_SOURCE_COLUMN (map));
253 pp_verbatim (context->printer,
254 "In file included from %s:%d",
255 map->to_file, LAST_SOURCE_LINE (map));
256 while (! MAIN_FILE_P (map))
258 map = INCLUDED_FROM (line_table, map);
259 pp_verbatim (context->printer,
261 map->to_file, LAST_SOURCE_LINE (map));
263 pp_verbatim (context->printer, ":");
264 pp_newline (context->printer);
270 default_diagnostic_starter (diagnostic_context *context,
271 diagnostic_info *diagnostic)
273 diagnostic_report_current_function (context, diagnostic);
274 pp_set_prefix (context->printer, diagnostic_build_prefix (diagnostic));
278 default_diagnostic_finalizer (diagnostic_context *context,
279 diagnostic_info *diagnostic ATTRIBUTE_UNUSED)
281 pp_destroy_prefix (context->printer);
284 /* Interface to specify diagnostic kind overrides. Returns the
285 previous setting, or DK_UNSPECIFIED if the parameters are out of
288 diagnostic_classify_diagnostic (diagnostic_context *context,
290 diagnostic_t new_kind)
292 diagnostic_t old_kind;
294 if (option_index <= 0
295 || option_index >= N_OPTS
296 || new_kind >= DK_LAST_DIAGNOSTIC_KIND)
297 return DK_UNSPECIFIED;
299 old_kind = context->classify_diagnostic[option_index];
300 context->classify_diagnostic[option_index] = new_kind;
304 /* Report a diagnostic message (an error or a warning) as specified by
305 DC. This function is *the* subroutine in terms of which front-ends
306 should implement their specific diagnostic handling modules. The
307 front-end independent format specifiers are exactly those described
308 in the documentation of output_format.
309 Return true if a diagnostic was printed, false otherwise. */
312 diagnostic_report_diagnostic (diagnostic_context *context,
313 diagnostic_info *diagnostic)
315 location_t location = diagnostic->location;
316 bool maybe_print_warnings_as_errors_message = false;
317 const char *saved_format_spec;
319 /* Give preference to being able to inhibit warnings, before they
320 get reclassified to something else. */
321 if ((diagnostic->kind == DK_WARNING || diagnostic->kind == DK_PEDWARN)
322 && !diagnostic_report_warnings_p (location))
325 if (diagnostic->kind == DK_NOTE && flag_compare_debug)
328 if (diagnostic->kind == DK_PEDWARN)
329 diagnostic->kind = pedantic_warning_kind ();
331 if (context->lock > 0)
333 /* If we're reporting an ICE in the middle of some other error,
334 try to flush out the previous error, then let this one
335 through. Don't do this more than once. */
336 if (diagnostic->kind == DK_ICE && context->lock == 1)
337 pp_flush (context->printer);
339 error_recursion (context);
342 /* If the user requested that warnings be treated as errors, so be
343 it. Note that we do this before the next block so that
344 individual warnings can be overridden back to warnings with
346 if (context->warning_as_error_requested
347 && diagnostic->kind == DK_WARNING)
349 diagnostic->kind = DK_ERROR;
350 maybe_print_warnings_as_errors_message = true;
353 if (diagnostic->option_index)
355 /* This tests if the user provided the appropriate -Wfoo or
357 if (! option_enabled (diagnostic->option_index))
359 /* This tests if the user provided the appropriate -Werror=foo
361 if (context->classify_diagnostic[diagnostic->option_index] != DK_UNSPECIFIED)
363 diagnostic->kind = context->classify_diagnostic[diagnostic->option_index];
364 maybe_print_warnings_as_errors_message = false;
366 /* This allows for future extensions, like temporarily disabling
367 warnings for ranges of source code. */
368 if (diagnostic->kind == DK_IGNORED)
372 /* If we changed the kind due to -Werror, and didn't override it, we
373 need to print this message. */
374 if (context->issue_warnings_are_errors_message
375 && maybe_print_warnings_as_errors_message)
377 pp_verbatim (context->printer,
378 "%s: warnings being treated as errors\n", progname);
379 context->issue_warnings_are_errors_message = false;
384 if (diagnostic->kind == DK_ICE && plugins_active_p ())
386 fnotice (stderr, "*** WARNING *** there are active plugins, do not report"
387 " this as a bug unless you can reproduce it without enabling"
389 dump_active_plugins (stderr);
392 if (diagnostic->kind == DK_ICE)
394 #ifndef ENABLE_CHECKING
395 /* When not checking, ICEs are converted to fatal errors when an
396 error has already occurred. This is counteracted by
398 if ((diagnostic_kind_count (context, DK_ERROR) > 0
399 || diagnostic_kind_count (context, DK_SORRY) > 0)
400 && !context->abort_on_error)
402 expanded_location s = expand_location (diagnostic->location);
403 fnotice (stderr, "%s:%d: confused by earlier errors, bailing out\n",
405 exit (ICE_EXIT_CODE);
408 if (context->internal_error)
409 (*context->internal_error) (diagnostic->message.format_spec,
410 diagnostic->message.args_ptr);
412 ++diagnostic_kind_count (context, diagnostic->kind);
414 saved_format_spec = diagnostic->message.format_spec;
415 if (context->show_option_requested && diagnostic->option_index)
416 diagnostic->message.format_spec
417 = ACONCAT ((diagnostic->message.format_spec,
418 " [", cl_options[diagnostic->option_index].opt_text, "]", NULL));
420 diagnostic->message.locus = &diagnostic->location;
421 diagnostic->message.abstract_origin = &diagnostic->abstract_origin;
422 diagnostic->abstract_origin = NULL;
423 pp_format (context->printer, &diagnostic->message);
424 (*diagnostic_starter (context)) (context, diagnostic);
425 pp_output_formatted_text (context->printer);
426 (*diagnostic_finalizer (context)) (context, diagnostic);
427 pp_flush (context->printer);
428 diagnostic_action_after_output (context, diagnostic);
429 diagnostic->message.format_spec = saved_format_spec;
430 diagnostic->abstract_origin = NULL;
437 /* Given a partial pathname as input, return another pathname that
438 shares no directory elements with the pathname of __FILE__. This
439 is used by fancy_abort() to print `Internal compiler error in expr.c'
440 instead of `Internal compiler error in ../../GCC/gcc/expr.c'. */
443 trim_filename (const char *name)
445 static const char this_file[] = __FILE__;
446 const char *p = name, *q = this_file;
448 /* First skip any "../" in each filename. This allows us to give a proper
449 reference to a file in a subdirectory. */
450 while (p[0] == '.' && p[1] == '.' && IS_DIR_SEPARATOR (p[2]))
453 while (q[0] == '.' && q[1] == '.' && IS_DIR_SEPARATOR (q[2]))
456 /* Now skip any parts the two filenames have in common. */
457 while (*p == *q && *p != 0 && *q != 0)
460 /* Now go backwards until the previous directory separator. */
461 while (p > name && !IS_DIR_SEPARATOR (p[-1]))
467 /* Standard error reporting routines in increasing order of severity.
468 All of these take arguments like printf. */
470 /* Text to be emitted verbatim to the error message stream; this
471 produces no prefix and disables line-wrapping. Use rarely. */
473 verbatim (const char *gmsgid, ...)
478 va_start (ap, gmsgid);
481 text.format_spec = _(gmsgid);
483 text.abstract_origin = NULL;
484 pp_format_verbatim (global_dc->printer, &text);
485 pp_flush (global_dc->printer);
490 emit_diagnostic (diagnostic_t kind, location_t location, int opt,
491 const char *gmsgid, ...)
493 diagnostic_info diagnostic;
496 va_start (ap, gmsgid);
497 if (kind == DK_PERMERROR)
499 diagnostic_set_info (&diagnostic, gmsgid, &ap, location,
500 permissive_error_kind ());
501 diagnostic.option_index = OPT_fpermissive;
504 diagnostic_set_info (&diagnostic, gmsgid, &ap, location, kind);
505 if (kind == DK_WARNING || kind == DK_PEDWARN)
506 diagnostic.option_index = opt;
510 return report_diagnostic (&diagnostic);
513 /* An informative note at LOCATION. Use this for additional details on an error
516 inform (location_t location, const char *gmsgid, ...)
518 diagnostic_info diagnostic;
521 va_start (ap, gmsgid);
522 diagnostic_set_info (&diagnostic, gmsgid, &ap, location, DK_NOTE);
523 report_diagnostic (&diagnostic);
527 /* A warning at INPUT_LOCATION. Use this for code which is correct according
528 to the relevant language specification but is likely to be buggy anyway.
529 Returns true if the warning was printed, false if it was inhibited. */
531 warning (int opt, const char *gmsgid, ...)
533 diagnostic_info diagnostic;
536 va_start (ap, gmsgid);
537 diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_WARNING);
538 diagnostic.option_index = opt;
541 return report_diagnostic (&diagnostic);
544 /* A warning at LOCATION. Use this for code which is correct according to the
545 relevant language specification but is likely to be buggy anyway.
546 Returns true if the warning was printed, false if it was inhibited. */
549 warning_at (location_t location, int opt, const char *gmsgid, ...)
551 diagnostic_info diagnostic;
554 va_start (ap, gmsgid);
555 diagnostic_set_info (&diagnostic, gmsgid, &ap, location, DK_WARNING);
556 diagnostic.option_index = opt;
558 return report_diagnostic (&diagnostic);
561 /* A "pedantic" warning at LOCATION: issues a warning unless
562 -pedantic-errors was given on the command line, in which case it
563 issues an error. Use this for diagnostics required by the relevant
564 language standard, if you have chosen not to make them errors.
566 Note that these diagnostics are issued independent of the setting
567 of the -pedantic command-line switch. To get a warning enabled
568 only with that switch, use either "if (pedantic) pedwarn
569 (OPT_pedantic,...)" or just "pedwarn (OPT_pedantic,..)". To get a
570 pedwarn independently of the -pedantic switch use "pedwarn (0,...)".
572 Returns true if the warning was printed, false if it was inhibited. */
575 pedwarn (location_t location, int opt, const char *gmsgid, ...)
577 diagnostic_info diagnostic;
580 va_start (ap, gmsgid);
581 diagnostic_set_info (&diagnostic, gmsgid, &ap, location, DK_PEDWARN);
582 diagnostic.option_index = opt;
584 return report_diagnostic (&diagnostic);
587 /* A "permissive" error at LOCATION: issues an error unless
588 -fpermissive was given on the command line, in which case it issues
589 a warning. Use this for things that really should be errors but we
590 want to support legacy code.
592 Returns true if the warning was printed, false if it was inhibited. */
595 permerror (location_t location, const char *gmsgid, ...)
597 diagnostic_info diagnostic;
600 va_start (ap, gmsgid);
601 diagnostic_set_info (&diagnostic, gmsgid, &ap, location,
602 permissive_error_kind ());
603 diagnostic.option_index = OPT_fpermissive;
605 return report_diagnostic (&diagnostic);
608 /* A hard error: the code is definitely ill-formed, and an object file
609 will not be produced. */
611 error (const char *gmsgid, ...)
613 diagnostic_info diagnostic;
616 va_start (ap, gmsgid);
617 diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_ERROR);
618 report_diagnostic (&diagnostic);
622 /* Same as ebove, but use location LOC instead of input_location. */
624 error_at (location_t loc, const char *gmsgid, ...)
626 diagnostic_info diagnostic;
629 va_start (ap, gmsgid);
630 diagnostic_set_info (&diagnostic, gmsgid, &ap, loc, DK_ERROR);
631 report_diagnostic (&diagnostic);
635 /* "Sorry, not implemented." Use for a language feature which is
636 required by the relevant specification but not implemented by GCC.
637 An object file will not be produced. */
639 sorry (const char *gmsgid, ...)
641 diagnostic_info diagnostic;
644 va_start (ap, gmsgid);
645 diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_SORRY);
646 report_diagnostic (&diagnostic);
650 /* An error which is severe enough that we make no attempt to
651 continue. Do not use this for internal consistency checks; that's
652 internal_error. Use of this function should be rare. */
654 fatal_error (const char *gmsgid, ...)
656 diagnostic_info diagnostic;
659 va_start (ap, gmsgid);
660 diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_FATAL);
661 report_diagnostic (&diagnostic);
667 /* An internal consistency check has failed. We make no attempt to
668 continue. Note that unless there is debugging value to be had from
669 a more specific message, or some other good reason, you should use
670 abort () instead of calling this function directly. */
672 internal_error (const char *gmsgid, ...)
674 diagnostic_info diagnostic;
677 va_start (ap, gmsgid);
678 diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_ICE);
679 report_diagnostic (&diagnostic);
685 /* Special case error functions. Most are implemented in terms of the
686 above, or should be. */
688 /* Print a diagnostic MSGID on FILE. This is just fprintf, except it
689 runs its second argument through gettext. */
691 fnotice (FILE *file, const char *cmsgid, ...)
695 va_start (ap, cmsgid);
696 vfprintf (file, _(cmsgid), ap);
700 /* Inform the user that an error occurred while trying to report some
701 other error. This indicates catastrophic internal inconsistencies,
702 so give up now. But do try to flush out the previous error.
703 This mustn't use internal_error, that will cause infinite recursion. */
706 error_recursion (diagnostic_context *context)
708 diagnostic_info diagnostic;
710 if (context->lock < 3)
711 pp_flush (context->printer);
714 "Internal compiler error: Error reporting routines re-entered.\n");
716 /* Call diagnostic_action_after_output to get the "please submit a bug
717 report" message. It only looks at the kind field of diagnostic_info. */
718 diagnostic.kind = DK_ICE;
719 diagnostic_action_after_output (context, &diagnostic);
721 /* Do not use gcc_unreachable here; that goes through internal_error
722 and therefore would cause infinite recursion. */
726 /* Report an internal compiler error in a friendly manner. This is
727 the function that gets called upon use of abort() in the source
728 code generally, thanks to a special macro. */
731 fancy_abort (const char *file, int line, const char *function)
733 internal_error ("in %s, at %s:%d", function, trim_filename (file), line);
736 /* Really call the system 'abort'. This has to go right at the end of
737 this file, so that there are no functions after it that call abort
738 and get the system abort instead of our macro. */