gcc/diagnostic.c

   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>
   5
   6 This file is part of GCC.
   7
   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
  11 version.
  12
  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
  16 for more details.
  17
  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/>.  */
  21
  22
  23 /* This file implements the language independent aspect of diagnostic
  24    message module.  */
  25
  26 #include "config.h"
  27 #undef FLOAT /* This is for hpux. They should change hpux.  */
  28 #undef FFS  /* Some systems define this in param.h.  */
  29 #include "system.h"
  30 #include "coretypes.h"
  31 #include "tm.h"
  32 #include "tree.h"
  33 #include "version.h"
  34 #include "tm_p.h"
  35 #include "flags.h"
  36 #include "input.h"
  37 #include "toplev.h"
  38 #include "intl.h"
  39 #include "diagnostic.h"
  40 #include "langhooks.h"
  41 #include "langhooks-def.h"
  42 #include "opts.h"
  43 #include "plugin.h"
  44
  45 #define pedantic_warning_kind() (flag_pedantic_errors ? DK_ERROR : DK_WARNING)
  46 #define permissive_error_kind() (flag_permissive ? DK_WARNING : DK_ERROR)
  47
  48 /* Prototypes.  */
  49 static char *build_message_string (const char *, ...) ATTRIBUTE_PRINTF_1;
  50
  51 static void error_recursion (diagnostic_context *) ATTRIBUTE_NORETURN;
  52
  53 static void diagnostic_action_after_output (diagnostic_context *,
  54                                             diagnostic_info *);
  55 static void real_abort (void) ATTRIBUTE_NORETURN;
  56
  57 /* A diagnostic_context surrogate for stderr.  */
  58 static diagnostic_context global_diagnostic_context;
  59 diagnostic_context *global_dc = &global_diagnostic_context;
  60
  61 \f
  62 /* Return a malloc'd string containing MSG formatted a la printf.  The
  63    caller is responsible for freeing the memory.  */
  64 static char *
  65 build_message_string (const char *msg, ...)
  66 {
  67   char *str;
  68   va_list ap;
  69
  70   va_start (ap, msg);
  71   vasprintf (&str, msg, ap);
  72   va_end (ap);
  73
  74   return str;
  75 }
  76
  77 /* Same as diagnostic_build_prefix, but only the source FILE is given.  */
  78 char *
  79 file_name_as_prefix (const char *f)
  80 {
  81   return build_message_string ("%s: ", f);
  82 }
  83
  84
  85 \f
  86 /* Initialize the diagnostic message outputting machinery.  */
  87 void
  88 diagnostic_initialize (diagnostic_context *context)
  89 {
  90   /* Allocate a basic pretty-printer.  Clients will replace this a
  91      much more elaborated pretty-printer if they wish.  */
  92   context->printer = XNEW (pretty_printer);
  93   pp_construct (context->printer, NULL, 0);
  94   /* By default, diagnostics are sent to stderr.  */
  95   context->printer->buffer->stream = stderr;
  96   /* By default, we emit prefixes once per message.  */
  97   context->printer->wrapping.rule = DIAGNOSTICS_SHOW_PREFIX_ONCE;
  98
  99   memset (context->diagnostic_count, 0, sizeof context->diagnostic_count);
 100   context->issue_warnings_are_errors_message = true;
 101   context->warning_as_error_requested = false;
 102   memset (context->classify_diagnostic, DK_UNSPECIFIED,
 103           sizeof context->classify_diagnostic);
 104   context->show_option_requested = false;
 105   context->abort_on_error = false;
 106   context->internal_error = NULL;
 107   diagnostic_starter (context) = default_diagnostic_starter;
 108   diagnostic_finalizer (context) = default_diagnostic_finalizer;
 109   context->last_module = 0;
 110   context->last_function = NULL;
 111   context->lock = 0;
 112   context->inhibit_notes_p = false;
 113 }
 114
 115 /* Initialize DIAGNOSTIC, where the message MSG has already been
 116    translated.  */
 117 void
 118 diagnostic_set_info_translated (diagnostic_info *diagnostic, const char *msg,
 119                                 va_list *args, location_t location,
 120                                 diagnostic_t kind)
 121 {
 122   diagnostic->message.err_no = errno;
 123   diagnostic->message.args_ptr = args;
 124   diagnostic->message.format_spec = msg;
 125   diagnostic->location = location;
 126   diagnostic->override_column = 0;
 127   diagnostic->kind = kind;
 128   diagnostic->option_index = 0;
 129 }
 130
 131 /* Initialize DIAGNOSTIC, where the message GMSGID has not yet been
 132    translated.  */
 133 void
 134 diagnostic_set_info (diagnostic_info *diagnostic, const char *gmsgid,
 135                      va_list *args, location_t location,
 136                      diagnostic_t kind)
 137 {
 138   diagnostic_set_info_translated (diagnostic, _(gmsgid), args, location, kind);
 139 }
 140
 141 /* Return a malloc'd string describing a location.  The caller is
 142    responsible for freeing the memory.  */
 143 char *
 144 diagnostic_build_prefix (diagnostic_info *diagnostic)
 145 {
 146   static const char *const diagnostic_kind_text[] = {
 147 #define DEFINE_DIAGNOSTIC_KIND(K, T) (T),
 148 #include "diagnostic.def"
 149 #undef DEFINE_DIAGNOSTIC_KIND
 150     "must-not-happen"
 151   };
 152   const char *text = _(diagnostic_kind_text[diagnostic->kind]);
 153   expanded_location s = expand_location (diagnostic->location);
 154   if (diagnostic->override_column)
 155     s.column = diagnostic->override_column;
 156   gcc_assert (diagnostic->kind < DK_LAST_DIAGNOSTIC_KIND);
 157
 158   return
 159     (s.file == NULL
 160      ? build_message_string ("%s: %s", progname, text)
 161      : flag_show_column
 162      ? build_message_string ("%s:%d:%d: %s", s.file, s.line, s.column, text)
 163      : build_message_string ("%s:%d: %s", s.file, s.line, text));
 164 }
 165
 166 /* Take any action which is expected to happen after the diagnostic
 167    is written out.  This function does not always return.  */
 168 static void
 169 diagnostic_action_after_output (diagnostic_context *context,
 170                                 diagnostic_info *diagnostic)
 171 {
 172   switch (diagnostic->kind)
 173     {
 174     case DK_DEBUG:
 175     case DK_NOTE:
 176     case DK_ANACHRONISM:
 177     case DK_WARNING:
 178       break;
 179
 180     case DK_ERROR:
 181     case DK_SORRY:
 182       if (context->abort_on_error)
 183         real_abort ();
 184       if (flag_fatal_errors)
 185         {
 186           fnotice (stderr, "compilation terminated due to -Wfatal-errors.\n");
 187           exit (FATAL_EXIT_CODE);
 188         }
 189       break;
 190
 191     case DK_ICE:
 192       if (context->abort_on_error)
 193         real_abort ();
 194
 195       fnotice (stderr, "Please submit a full bug report,\n"
 196                "with preprocessed source if appropriate.\n"
 197                "See %s for instructions.\n", bug_report_url);
 198       exit (ICE_EXIT_CODE);
 199
 200     case DK_FATAL:
 201       if (context->abort_on_error)
 202         real_abort ();
 203
 204       fnotice (stderr, "compilation terminated.\n");
 205       exit (FATAL_EXIT_CODE);
 206
 207     default:
 208       gcc_unreachable ();
 209     }
 210 }
 211
 212 /* Prints out, if necessary, the name of the current function
 213    that caused an error.  Called from all error and warning functions.  */
 214 void
 215 diagnostic_report_current_function (diagnostic_context *context,
 216                                     diagnostic_info *diagnostic)
 217 {
 218   diagnostic_report_current_module (context);
 219   lang_hooks.print_error_function (context, input_filename, diagnostic);
 220 }
 221
 222 void
 223 diagnostic_report_current_module (diagnostic_context *context)
 224 {
 225   const struct line_map *map;
 226
 227   if (pp_needs_newline (context->printer))
 228     {
 229       pp_newline (context->printer);
 230       pp_needs_newline (context->printer) = false;
 231     }
 232
 233   if (input_location <= BUILTINS_LOCATION)
 234     return;
 235
 236   map = linemap_lookup (line_table, input_location);
 237   if (map && diagnostic_last_module_changed (context, map))
 238     {
 239       diagnostic_set_last_module (context, map);
 240       if (! MAIN_FILE_P (map))
 241         {
 242           map = INCLUDED_FROM (line_table, map);
 243           if (flag_show_column)
 244             pp_verbatim (context->printer,
 245                          "In file included from %s:%d:%d",
 246                          map->to_file,
 247                          LAST_SOURCE_LINE (map), LAST_SOURCE_COLUMN (map));
 248           else
 249             pp_verbatim (context->printer,
 250                          "In file included from %s:%d",
 251                          map->to_file, LAST_SOURCE_LINE (map));
 252           while (! MAIN_FILE_P (map))
 253             {
 254               map = INCLUDED_FROM (line_table, map);
 255               pp_verbatim (context->printer,
 256                            ",\n                 from %s:%d",
 257                            map->to_file, LAST_SOURCE_LINE (map));
 258             }
 259           pp_verbatim (context->printer, ":");
 260           pp_newline (context->printer);
 261         }
 262     }
 263 }
 264
 265 void
 266 default_diagnostic_starter (diagnostic_context *context,
 267                             diagnostic_info *diagnostic)
 268 {
 269   diagnostic_report_current_function (context, diagnostic);
 270   pp_set_prefix (context->printer, diagnostic_build_prefix (diagnostic));
 271 }
 272
 273 void
 274 default_diagnostic_finalizer (diagnostic_context *context,
 275                               diagnostic_info *diagnostic ATTRIBUTE_UNUSED)
 276 {
 277   pp_destroy_prefix (context->printer);
 278 }
 279
 280 /* Interface to specify diagnostic kind overrides.  Returns the
 281    previous setting, or DK_UNSPECIFIED if the parameters are out of
 282    range.  */
 283 diagnostic_t
 284 diagnostic_classify_diagnostic (diagnostic_context *context,
 285                                 int option_index,
 286                                 diagnostic_t new_kind)
 287 {
 288   diagnostic_t old_kind;
 289
 290   if (option_index <= 0
 291       || option_index >= N_OPTS
 292       || new_kind >= DK_LAST_DIAGNOSTIC_KIND)
 293     return DK_UNSPECIFIED;
 294
 295   old_kind = context->classify_diagnostic[option_index];
 296   context->classify_diagnostic[option_index] = new_kind;
 297   return old_kind;
 298 }
 299
 300 /* Report a diagnostic message (an error or a warning) as specified by
 301    DC.  This function is *the* subroutine in terms of which front-ends
 302    should implement their specific diagnostic handling modules.  The
 303    front-end independent format specifiers are exactly those described
 304    in the documentation of output_format.
 305    Return true if a diagnostic was printed, false otherwise.  */
 306
 307 bool
 308 diagnostic_report_diagnostic (diagnostic_context *context,
 309                               diagnostic_info *diagnostic)
 310 {
 311   location_t location = diagnostic->location;
 312   bool maybe_print_warnings_as_errors_message = false;
 313   const char *saved_format_spec;
 314
 315   /* Give preference to being able to inhibit warnings, before they
 316      get reclassified to something else.  */
 317   if ((diagnostic->kind == DK_WARNING || diagnostic->kind == DK_PEDWARN)
 318       && !diagnostic_report_warnings_p (location))
 319     return false;
 320
 321   if (diagnostic->kind == DK_PEDWARN)
 322     diagnostic->kind = pedantic_warning_kind ();
 323
 324   if (diagnostic->kind == DK_NOTE && context->inhibit_notes_p)
 325     return false;
 326
 327   if (context->lock > 0)
 328     {
 329       /* If we're reporting an ICE in the middle of some other error,
 330          try to flush out the previous error, then let this one
 331          through.  Don't do this more than once.  */
 332       if (diagnostic->kind == DK_ICE && context->lock == 1)
 333         pp_flush (context->printer);
 334       else
 335         error_recursion (context);
 336     }
 337
 338   /* If the user requested that warnings be treated as errors, so be
 339      it.  Note that we do this before the next block so that
 340      individual warnings can be overridden back to warnings with
 341      -Wno-error=*.  */
 342   if (context->warning_as_error_requested
 343       && diagnostic->kind == DK_WARNING)
 344     {
 345       diagnostic->kind = DK_ERROR;
 346       maybe_print_warnings_as_errors_message = true;
 347     }
 348
 349   if (diagnostic->option_index)
 350     {
 351       /* This tests if the user provided the appropriate -Wfoo or
 352          -Wno-foo option.  */
 353       if (! option_enabled (diagnostic->option_index))
 354         return false;
 355       /* This tests if the user provided the appropriate -Werror=foo
 356          option.  */
 357       if (context->classify_diagnostic[diagnostic->option_index] != DK_UNSPECIFIED)
 358         {
 359           diagnostic->kind = context->classify_diagnostic[diagnostic->option_index];
 360           maybe_print_warnings_as_errors_message = false;
 361         }
 362       /* This allows for future extensions, like temporarily disabling
 363          warnings for ranges of source code.  */
 364       if (diagnostic->kind == DK_IGNORED)
 365         return false;
 366     }
 367
 368   /* If we changed the kind due to -Werror, and didn't override it, we
 369      need to print this message.  */
 370   if (context->issue_warnings_are_errors_message
 371       && maybe_print_warnings_as_errors_message)
 372     {
 373       pp_verbatim (context->printer,
 374                    "%s: warnings being treated as errors\n", progname);
 375       context->issue_warnings_are_errors_message = false;
 376     }
 377
 378   context->lock++;
 379
 380   if (diagnostic->kind == DK_ICE && plugins_active_p ())
 381     {
 382       fnotice (stderr, "*** WARNING *** there are active plugins, do not report"
 383                " this as a bug unless you can reproduce it without enabling"
 384                " any plugins.\n");
 385       dump_active_plugins (stderr);
 386     }
 387
 388   if (diagnostic->kind == DK_ICE)
 389     {
 390 #ifndef ENABLE_CHECKING
 391       /* When not checking, ICEs are converted to fatal errors when an
 392          error has already occurred.  This is counteracted by
 393          abort_on_error.  */
 394       if ((diagnostic_kind_count (context, DK_ERROR) > 0
 395            || diagnostic_kind_count (context, DK_SORRY) > 0)
 396           && !context->abort_on_error)
 397         {
 398           expanded_location s = expand_location (diagnostic->location);
 399           fnotice (stderr, "%s:%d: confused by earlier errors, bailing out\n",
 400                    s.file, s.line);
 401           exit (ICE_EXIT_CODE);
 402         }
 403 #endif
 404       if (context->internal_error)
 405         (*context->internal_error) (diagnostic->message.format_spec,
 406                                     diagnostic->message.args_ptr);
 407     }
 408   ++diagnostic_kind_count (context, diagnostic->kind);
 409
 410   saved_format_spec = diagnostic->message.format_spec;
 411   if (context->show_option_requested && diagnostic->option_index)
 412     diagnostic->message.format_spec
 413       = ACONCAT ((diagnostic->message.format_spec,
 414                   " [", cl_options[diagnostic->option_index].opt_text, "]", NULL));
 415
 416   diagnostic->message.locus = &diagnostic->location;
 417   diagnostic->message.abstract_origin = &diagnostic->abstract_origin;
 418   diagnostic->abstract_origin = NULL;
 419   pp_format (context->printer, &diagnostic->message);
 420   (*diagnostic_starter (context)) (context, diagnostic);
 421   pp_output_formatted_text (context->printer);
 422   (*diagnostic_finalizer (context)) (context, diagnostic);
 423   pp_flush (context->printer);
 424   diagnostic_action_after_output (context, diagnostic);
 425   diagnostic->message.format_spec = saved_format_spec;
 426   diagnostic->abstract_origin = NULL;
 427
 428   context->lock--;
 429
 430   return true;
 431 }
 432
 433 /* Given a partial pathname as input, return another pathname that
 434    shares no directory elements with the pathname of __FILE__.  This
 435    is used by fancy_abort() to print `Internal compiler error in expr.c'
 436    instead of `Internal compiler error in ../../GCC/gcc/expr.c'.  */
 437
 438 const char *
 439 trim_filename (const char *name)
 440 {
 441   static const char this_file[] = __FILE__;
 442   const char *p = name, *q = this_file;
 443
 444   /* First skip any "../" in each filename.  This allows us to give a proper
 445      reference to a file in a subdirectory.  */
 446   while (p[0] == '.' && p[1] == '.' && IS_DIR_SEPARATOR (p[2]))
 447     p += 3;
 448
 449   while (q[0] == '.' && q[1] == '.' && IS_DIR_SEPARATOR (q[2]))
 450     q += 3;
 451
 452   /* Now skip any parts the two filenames have in common.  */
 453   while (*p == *q && *p != 0 && *q != 0)
 454     p++, q++;
 455
 456   /* Now go backwards until the previous directory separator.  */
 457   while (p > name && !IS_DIR_SEPARATOR (p[-1]))
 458     p--;
 459
 460   return p;
 461 }
 462 \f
 463 /* Standard error reporting routines in increasing order of severity.
 464    All of these take arguments like printf.  */
 465
 466 /* Text to be emitted verbatim to the error message stream; this
 467    produces no prefix and disables line-wrapping.  Use rarely.  */
 468 void
 469 verbatim (const char *gmsgid, ...)
 470 {
 471   text_info text;
 472   va_list ap;
 473
 474   va_start (ap, gmsgid);
 475   text.err_no = errno;
 476   text.args_ptr = &ap;
 477   text.format_spec = _(gmsgid);
 478   text.locus = NULL;
 479   text.abstract_origin = NULL;
 480   pp_format_verbatim (global_dc->printer, &text);
 481   pp_flush (global_dc->printer);
 482   va_end (ap);
 483 }
 484
 485 bool
 486 emit_diagnostic (diagnostic_t kind, location_t location, int opt,
 487                  const char *gmsgid, ...)
 488 {
 489   diagnostic_info diagnostic;
 490   va_list ap;
 491
 492   va_start (ap, gmsgid);
 493   if (kind == DK_PERMERROR)
 494     {
 495       diagnostic_set_info (&diagnostic, gmsgid, &ap, location,
 496                            permissive_error_kind ());
 497       diagnostic.option_index = OPT_fpermissive;
 498     }
 499   else {
 500       diagnostic_set_info (&diagnostic, gmsgid, &ap, location, kind);
 501       if (kind == DK_WARNING || kind == DK_PEDWARN)
 502         diagnostic.option_index = opt;
 503   }
 504   va_end (ap);
 505
 506   return report_diagnostic (&diagnostic);
 507 }
 508
 509 /* An informative note at LOCATION.  Use this for additional details on an error
 510    message.  */
 511 void
 512 inform (location_t location, const char *gmsgid, ...)
 513 {
 514   diagnostic_info diagnostic;
 515   va_list ap;
 516
 517   va_start (ap, gmsgid);
 518   diagnostic_set_info (&diagnostic, gmsgid, &ap, location, DK_NOTE);
 519   report_diagnostic (&diagnostic);
 520   va_end (ap);
 521 }
 522
 523 /* A warning at INPUT_LOCATION.  Use this for code which is correct according
 524    to the relevant language specification but is likely to be buggy anyway.
 525    Returns true if the warning was printed, false if it was inhibited.  */
 526 bool
 527 warning (int opt, const char *gmsgid, ...)
 528 {
 529   diagnostic_info diagnostic;
 530   va_list ap;
 531
 532   va_start (ap, gmsgid);
 533   diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_WARNING);
 534   diagnostic.option_index = opt;
 535
 536   va_end (ap);
 537   return report_diagnostic (&diagnostic);
 538 }
 539
 540 /* A warning at LOCATION.  Use this for code which is correct according to the
 541    relevant language specification but is likely to be buggy anyway.
 542    Returns true if the warning was printed, false if it was inhibited.  */
 543
 544 bool
 545 warning_at (location_t location, int opt, const char *gmsgid, ...)
 546 {
 547   diagnostic_info diagnostic;
 548   va_list ap;
 549
 550   va_start (ap, gmsgid);
 551   diagnostic_set_info (&diagnostic, gmsgid, &ap, location, DK_WARNING);
 552   diagnostic.option_index = opt;
 553   va_end (ap);
 554   return report_diagnostic (&diagnostic);
 555 }
 556
 557 /* A "pedantic" warning at LOCATION: issues a warning unless
 558    -pedantic-errors was given on the command line, in which case it
 559    issues an error.  Use this for diagnostics required by the relevant
 560    language standard, if you have chosen not to make them errors.
 561
 562    Note that these diagnostics are issued independent of the setting
 563    of the -pedantic command-line switch.  To get a warning enabled
 564    only with that switch, use either "if (pedantic) pedwarn
 565    (OPT_pedantic,...)" or just "pedwarn (OPT_pedantic,..)".  To get a
 566    pedwarn independently of the -pedantic switch use "pedwarn (0,...)".
 567
 568    Returns true if the warning was printed, false if it was inhibited.  */
 569
 570 bool
 571 pedwarn (location_t location, int opt, const char *gmsgid, ...)
 572 {
 573   diagnostic_info diagnostic;
 574   va_list ap;
 575
 576   va_start (ap, gmsgid);
 577   diagnostic_set_info (&diagnostic, gmsgid, &ap, location,  DK_PEDWARN);
 578   diagnostic.option_index = opt;
 579   va_end (ap);
 580   return report_diagnostic (&diagnostic);
 581 }
 582
 583 /* A "permissive" error at LOCATION: issues an error unless
 584    -fpermissive was given on the command line, in which case it issues
 585    a warning.  Use this for things that really should be errors but we
 586    want to support legacy code.
 587
 588    Returns true if the warning was printed, false if it was inhibited.  */
 589
 590 bool
 591 permerror (location_t location, const char *gmsgid, ...)
 592 {
 593   diagnostic_info diagnostic;
 594   va_list ap;
 595
 596   va_start (ap, gmsgid);
 597   diagnostic_set_info (&diagnostic, gmsgid, &ap, location,
 598                        permissive_error_kind ());
 599   diagnostic.option_index = OPT_fpermissive;
 600   va_end (ap);
 601   return report_diagnostic (&diagnostic);
 602 }
 603
 604 /* A hard error: the code is definitely ill-formed, and an object file
 605    will not be produced.  */
 606 void
 607 error (const char *gmsgid, ...)
 608 {
 609   diagnostic_info diagnostic;
 610   va_list ap;
 611
 612   va_start (ap, gmsgid);
 613   diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_ERROR);
 614   report_diagnostic (&diagnostic);
 615   va_end (ap);
 616 }
 617
 618 /* Same as ebove, but use location LOC instead of input_location.  */
 619 void
 620 error_at (location_t loc, const char *gmsgid, ...)
 621 {
 622   diagnostic_info diagnostic;
 623   va_list ap;
 624
 625   va_start (ap, gmsgid);
 626   diagnostic_set_info (&diagnostic, gmsgid, &ap, loc, DK_ERROR);
 627   report_diagnostic (&diagnostic);
 628   va_end (ap);
 629 }
 630
 631 /* "Sorry, not implemented."  Use for a language feature which is
 632    required by the relevant specification but not implemented by GCC.
 633    An object file will not be produced.  */
 634 void
 635 sorry (const char *gmsgid, ...)
 636 {
 637   diagnostic_info diagnostic;
 638   va_list ap;
 639
 640   va_start (ap, gmsgid);
 641   diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_SORRY);
 642   report_diagnostic (&diagnostic);
 643   va_end (ap);
 644 }
 645
 646 /* An error which is severe enough that we make no attempt to
 647    continue.  Do not use this for internal consistency checks; that's
 648    internal_error.  Use of this function should be rare.  */
 649 void
 650 fatal_error (const char *gmsgid, ...)
 651 {
 652   diagnostic_info diagnostic;
 653   va_list ap;
 654
 655   va_start (ap, gmsgid);
 656   diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_FATAL);
 657   report_diagnostic (&diagnostic);
 658   va_end (ap);
 659
 660   gcc_unreachable ();
 661 }
 662
 663 /* An internal consistency check has failed.  We make no attempt to
 664    continue.  Note that unless there is debugging value to be had from
 665    a more specific message, or some other good reason, you should use
 666    abort () instead of calling this function directly.  */
 667 void
 668 internal_error (const char *gmsgid, ...)
 669 {
 670   diagnostic_info diagnostic;
 671   va_list ap;
 672
 673   va_start (ap, gmsgid);
 674   diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_ICE);
 675   report_diagnostic (&diagnostic);
 676   va_end (ap);
 677
 678   gcc_unreachable ();
 679 }
 680 \f
 681 /* Special case error functions.  Most are implemented in terms of the
 682    above, or should be.  */
 683
 684 /* Print a diagnostic MSGID on FILE.  This is just fprintf, except it
 685    runs its second argument through gettext.  */
 686 void
 687 fnotice (FILE *file, const char *cmsgid, ...)
 688 {
 689   va_list ap;
 690
 691   va_start (ap, cmsgid);
 692   vfprintf (file, _(cmsgid), ap);
 693   va_end (ap);
 694 }
 695
 696 /* Inform the user that an error occurred while trying to report some
 697    other error.  This indicates catastrophic internal inconsistencies,
 698    so give up now.  But do try to flush out the previous error.
 699    This mustn't use internal_error, that will cause infinite recursion.  */
 700
 701 static void
 702 error_recursion (diagnostic_context *context)
 703 {
 704   diagnostic_info diagnostic;
 705
 706   if (context->lock < 3)
 707     pp_flush (context->printer);
 708
 709   fnotice (stderr,
 710            "Internal compiler error: Error reporting routines re-entered.\n");
 711
 712   /* Call diagnostic_action_after_output to get the "please submit a bug
 713      report" message.  It only looks at the kind field of diagnostic_info.  */
 714   diagnostic.kind = DK_ICE;
 715   diagnostic_action_after_output (context, &diagnostic);
 716
 717   /* Do not use gcc_unreachable here; that goes through internal_error
 718      and therefore would cause infinite recursion.  */
 719   real_abort ();
 720 }
 721
 722 /* Report an internal compiler error in a friendly manner.  This is
 723    the function that gets called upon use of abort() in the source
 724    code generally, thanks to a special macro.  */
 725
 726 void
 727 fancy_abort (const char *file, int line, const char *function)
 728 {
 729   internal_error ("in %s, at %s:%d", function, trim_filename (file), line);
 730 }
 731
 732 /* Really call the system 'abort'.  This has to go right at the end of
 733    this file, so that there are no functions after it that call abort
 734    and get the system abort instead of our macro.  */
 735 #undef abort
 736 static void
 737 real_abort (void)
 738 {
 739   abort ();
 740 }