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 default_diagnostic_starter (diagnostic_context *,
  52                                         diagnostic_info *);
  53 static void default_diagnostic_finalizer (diagnostic_context *,
  54                                           diagnostic_info *);
  55
  56 static void error_recursion (diagnostic_context *) ATTRIBUTE_NORETURN;
  57
  58 static void diagnostic_action_after_output (diagnostic_context *,
  59                                             diagnostic_info *);
  60 static void real_abort (void) ATTRIBUTE_NORETURN;
  61
  62 /* A diagnostic_context surrogate for stderr.  */
  63 static diagnostic_context global_diagnostic_context;
  64 diagnostic_context *global_dc = &global_diagnostic_context;
  65
  66 \f
  67 /* Return a malloc'd string containing MSG formatted a la printf.  The
  68    caller is responsible for freeing the memory.  */
  69 static char *
  70 build_message_string (const char *msg, ...)
  71 {
  72   char *str;
  73   va_list ap;
  74
  75   va_start (ap, msg);
  76   vasprintf (&str, msg, ap);
  77   va_end (ap);
  78
  79   return str;
  80 }
  81
  82 /* Same as diagnostic_build_prefix, but only the source FILE is given.  */
  83 char *
  84 file_name_as_prefix (const char *f)
  85 {
  86   return build_message_string ("%s: ", f);
  87 }
  88
  89
  90 \f
  91 /* Initialize the diagnostic message outputting machinery.  */
  92 void
  93 diagnostic_initialize (diagnostic_context *context)
  94 {
  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;
 103
 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;
 116   context->lock = 0;
 117 }
 118
 119 /* Initialize DIAGNOSTIC, where the message MSG has already been
 120    translated.  */
 121 void
 122 diagnostic_set_info_translated (diagnostic_info *diagnostic, const char *msg,
 123                                 va_list *args, location_t location,
 124                                 diagnostic_t kind)
 125 {
 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;
 133 }
 134
 135 /* Initialize DIAGNOSTIC, where the message GMSGID has not yet been
 136    translated.  */
 137 void
 138 diagnostic_set_info (diagnostic_info *diagnostic, const char *gmsgid,
 139                      va_list *args, location_t location,
 140                      diagnostic_t kind)
 141 {
 142   diagnostic_set_info_translated (diagnostic, _(gmsgid), args, location, kind);
 143 }
 144
 145 /* Return a malloc'd string describing a location.  The caller is
 146    responsible for freeing the memory.  */
 147 char *
 148 diagnostic_build_prefix (diagnostic_info *diagnostic)
 149 {
 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
 154     "must-not-happen"
 155   };
 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);
 161
 162   return
 163     (s.file == NULL
 164      ? build_message_string ("%s: %s", progname, text)
 165      : flag_show_column
 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));
 168 }
 169
 170 /* Take any action which is expected to happen after the diagnostic
 171    is written out.  This function does not always return.  */
 172 static void
 173 diagnostic_action_after_output (diagnostic_context *context,
 174                                 diagnostic_info *diagnostic)
 175 {
 176   switch (diagnostic->kind)
 177     {
 178     case DK_DEBUG:
 179     case DK_NOTE:
 180     case DK_ANACHRONISM:
 181     case DK_WARNING:
 182       break;
 183
 184     case DK_ERROR:
 185     case DK_SORRY:
 186       if (context->abort_on_error)
 187         real_abort ();
 188       if (flag_fatal_errors)
 189         {
 190           fnotice (stderr, "compilation terminated due to -Wfatal-errors.\n");
 191           exit (FATAL_EXIT_CODE);
 192         }
 193       break;
 194
 195     case DK_ICE:
 196       if (context->abort_on_error)
 197         real_abort ();
 198
 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);
 203
 204     case DK_FATAL:
 205       if (context->abort_on_error)
 206         real_abort ();
 207
 208       fnotice (stderr, "compilation terminated.\n");
 209       exit (FATAL_EXIT_CODE);
 210
 211     default:
 212       gcc_unreachable ();
 213     }
 214 }
 215
 216 /* Prints out, if necessary, the name of the current function
 217    that caused an error.  Called from all error and warning functions.  */
 218 void
 219 diagnostic_report_current_function (diagnostic_context *context,
 220                                     diagnostic_info *diagnostic)
 221 {
 222   diagnostic_report_current_module (context);
 223   lang_hooks.print_error_function (context, input_filename, diagnostic);
 224 }
 225
 226 void
 227 diagnostic_report_current_module (diagnostic_context *context)
 228 {
 229   const struct line_map *map;
 230
 231   if (pp_needs_newline (context->printer))
 232     {
 233       pp_newline (context->printer);
 234       pp_needs_newline (context->printer) = false;
 235     }
 236
 237   if (input_location <= BUILTINS_LOCATION)
 238     return;
 239
 240   map = linemap_lookup (line_table, input_location);
 241   if (map && diagnostic_last_module_changed (context, map))
 242     {
 243       diagnostic_set_last_module (context, map);
 244       if (! MAIN_FILE_P (map))
 245         {
 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",
 250                          map->to_file,
 251                          LAST_SOURCE_LINE (map), LAST_SOURCE_COLUMN (map));
 252           else
 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))
 257             {
 258               map = INCLUDED_FROM (line_table, map);
 259               pp_verbatim (context->printer,
 260                            ",\n                 from %s:%d",
 261                            map->to_file, LAST_SOURCE_LINE (map));
 262             }
 263           pp_verbatim (context->printer, ":");
 264           pp_newline (context->printer);
 265         }
 266     }
 267 }
 268
 269 static void
 270 default_diagnostic_starter (diagnostic_context *context,
 271                             diagnostic_info *diagnostic)
 272 {
 273   diagnostic_report_current_function (context, diagnostic);
 274   pp_set_prefix (context->printer, diagnostic_build_prefix (diagnostic));
 275 }
 276
 277 static void
 278 default_diagnostic_finalizer (diagnostic_context *context,
 279                               diagnostic_info *diagnostic ATTRIBUTE_UNUSED)
 280 {
 281   pp_destroy_prefix (context->printer);
 282 }
 283
 284 /* Interface to specify diagnostic kind overrides.  Returns the
 285    previous setting, or DK_UNSPECIFIED if the parameters are out of
 286    range.  */
 287 diagnostic_t
 288 diagnostic_classify_diagnostic (diagnostic_context *context,
 289                                 int option_index,
 290                                 diagnostic_t new_kind)
 291 {
 292   diagnostic_t old_kind;
 293
 294   if (option_index <= 0
 295       || option_index >= N_OPTS
 296       || new_kind >= DK_LAST_DIAGNOSTIC_KIND)
 297     return DK_UNSPECIFIED;
 298
 299   old_kind = context->classify_diagnostic[option_index];
 300   context->classify_diagnostic[option_index] = new_kind;
 301   return old_kind;
 302 }
 303
 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.  */
 310
 311 bool
 312 diagnostic_report_diagnostic (diagnostic_context *context,
 313                               diagnostic_info *diagnostic)
 314 {
 315   location_t location = diagnostic->location;
 316   bool maybe_print_warnings_as_errors_message = false;
 317   const char *saved_format_spec;
 318
 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))
 323     return false;
 324
 325   if (diagnostic->kind == DK_PEDWARN)
 326     diagnostic->kind = pedantic_warning_kind ();
 327
 328   if (context->lock > 0)
 329     {
 330       /* If we're reporting an ICE in the middle of some other error,
 331          try to flush out the previous error, then let this one
 332          through.  Don't do this more than once.  */
 333       if (diagnostic->kind == DK_ICE && context->lock == 1)
 334         pp_flush (context->printer);
 335       else
 336         error_recursion (context);
 337     }
 338
 339   /* If the user requested that warnings be treated as errors, so be
 340      it.  Note that we do this before the next block so that
 341      individual warnings can be overridden back to warnings with
 342      -Wno-error=*.  */
 343   if (context->warning_as_error_requested
 344       && diagnostic->kind == DK_WARNING)
 345     {
 346       diagnostic->kind = DK_ERROR;
 347       maybe_print_warnings_as_errors_message = true;
 348     }
 349
 350   if (diagnostic->option_index)
 351     {
 352       /* This tests if the user provided the appropriate -Wfoo or
 353          -Wno-foo option.  */
 354       if (! option_enabled (diagnostic->option_index))
 355         return false;
 356       /* This tests if the user provided the appropriate -Werror=foo
 357          option.  */
 358       if (context->classify_diagnostic[diagnostic->option_index] != DK_UNSPECIFIED)
 359         {
 360           diagnostic->kind = context->classify_diagnostic[diagnostic->option_index];
 361           maybe_print_warnings_as_errors_message = false;
 362         }
 363       /* This allows for future extensions, like temporarily disabling
 364          warnings for ranges of source code.  */
 365       if (diagnostic->kind == DK_IGNORED)
 366         return false;
 367     }
 368
 369   /* If we changed the kind due to -Werror, and didn't override it, we
 370      need to print this message.  */
 371   if (context->issue_warnings_are_errors_message
 372       && maybe_print_warnings_as_errors_message)
 373     {
 374       pp_verbatim (context->printer,
 375                    "%s: warnings being treated as errors\n", progname);
 376       context->issue_warnings_are_errors_message = false;
 377     }
 378
 379   context->lock++;
 380
 381   if (diagnostic->kind == DK_ICE && plugins_active_p ())
 382     {
 383       fnotice (stderr, "*** WARNING *** there are active plugins, do not report"
 384                " this as a bug unless you can reproduce it without enabling"
 385                " any plugins.\n");
 386       dump_active_plugins (stderr);
 387     }
 388
 389   if (diagnostic->kind == DK_ICE)
 390     {
 391 #ifndef ENABLE_CHECKING
 392       /* When not checking, ICEs are converted to fatal errors when an
 393          error has already occurred.  This is counteracted by
 394          abort_on_error.  */
 395       if ((diagnostic_kind_count (context, DK_ERROR) > 0
 396            || diagnostic_kind_count (context, DK_SORRY) > 0)
 397           && !context->abort_on_error)
 398         {
 399           expanded_location s = expand_location (diagnostic->location);
 400           fnotice (stderr, "%s:%d: confused by earlier errors, bailing out\n",
 401                    s.file, s.line);
 402           exit (ICE_EXIT_CODE);
 403         }
 404 #endif
 405       if (context->internal_error)
 406         (*context->internal_error) (diagnostic->message.format_spec,
 407                                     diagnostic->message.args_ptr);
 408     }
 409   ++diagnostic_kind_count (context, diagnostic->kind);
 410
 411   saved_format_spec = diagnostic->message.format_spec;
 412   if (context->show_option_requested && diagnostic->option_index)
 413     diagnostic->message.format_spec
 414       = ACONCAT ((diagnostic->message.format_spec,
 415                   " [", cl_options[diagnostic->option_index].opt_text, "]", NULL));
 416
 417   diagnostic->message.locus = &diagnostic->location;
 418   diagnostic->message.abstract_origin = &diagnostic->abstract_origin;
 419   diagnostic->abstract_origin = NULL;
 420   pp_format (context->printer, &diagnostic->message);
 421   (*diagnostic_starter (context)) (context, diagnostic);
 422   pp_output_formatted_text (context->printer);
 423   (*diagnostic_finalizer (context)) (context, diagnostic);
 424   pp_flush (context->printer);
 425   diagnostic_action_after_output (context, diagnostic);
 426   diagnostic->message.format_spec = saved_format_spec;
 427   diagnostic->abstract_origin = NULL;
 428
 429   context->lock--;
 430
 431   return true;
 432 }
 433
 434 /* Given a partial pathname as input, return another pathname that
 435    shares no directory elements with the pathname of __FILE__.  This
 436    is used by fancy_abort() to print `Internal compiler error in expr.c'
 437    instead of `Internal compiler error in ../../GCC/gcc/expr.c'.  */
 438
 439 const char *
 440 trim_filename (const char *name)
 441 {
 442   static const char this_file[] = __FILE__;
 443   const char *p = name, *q = this_file;
 444
 445   /* First skip any "../" in each filename.  This allows us to give a proper
 446      reference to a file in a subdirectory.  */
 447   while (p[0] == '.' && p[1] == '.' && IS_DIR_SEPARATOR (p[2]))
 448     p += 3;
 449
 450   while (q[0] == '.' && q[1] == '.' && IS_DIR_SEPARATOR (q[2]))
 451     q += 3;
 452
 453   /* Now skip any parts the two filenames have in common.  */
 454   while (*p == *q && *p != 0 && *q != 0)
 455     p++, q++;
 456
 457   /* Now go backwards until the previous directory separator.  */
 458   while (p > name && !IS_DIR_SEPARATOR (p[-1]))
 459     p--;
 460
 461   return p;
 462 }
 463 \f
 464 /* Standard error reporting routines in increasing order of severity.
 465    All of these take arguments like printf.  */
 466
 467 /* Text to be emitted verbatim to the error message stream; this
 468    produces no prefix and disables line-wrapping.  Use rarely.  */
 469 void
 470 verbatim (const char *gmsgid, ...)
 471 {
 472   text_info text;
 473   va_list ap;
 474
 475   va_start (ap, gmsgid);
 476   text.err_no = errno;
 477   text.args_ptr = &ap;
 478   text.format_spec = _(gmsgid);
 479   text.locus = NULL;
 480   text.abstract_origin = NULL;
 481   pp_format_verbatim (global_dc->printer, &text);
 482   pp_flush (global_dc->printer);
 483   va_end (ap);
 484 }
 485
 486 bool
 487 emit_diagnostic (diagnostic_t kind, location_t location, int opt,
 488                  const char *gmsgid, ...)
 489 {
 490   diagnostic_info diagnostic;
 491   va_list ap;
 492
 493   va_start (ap, gmsgid);
 494   if (kind == DK_PERMERROR)
 495     {
 496       diagnostic_set_info (&diagnostic, gmsgid, &ap, location,
 497                            permissive_error_kind ());
 498       diagnostic.option_index = OPT_fpermissive;
 499     }
 500   else {
 501       diagnostic_set_info (&diagnostic, gmsgid, &ap, location, kind);
 502       if (kind == DK_WARNING || kind == DK_PEDWARN)
 503         diagnostic.option_index = opt;
 504   }
 505   va_end (ap);
 506
 507   return report_diagnostic (&diagnostic);
 508 }
 509
 510 /* An informative note at LOCATION.  Use this for additional details on an error
 511    message.  */
 512 void
 513 inform (location_t location, const char *gmsgid, ...)
 514 {
 515   diagnostic_info diagnostic;
 516   va_list ap;
 517
 518   va_start (ap, gmsgid);
 519   diagnostic_set_info (&diagnostic, gmsgid, &ap, location, DK_NOTE);
 520   report_diagnostic (&diagnostic);
 521   va_end (ap);
 522 }
 523
 524 /* A warning at INPUT_LOCATION.  Use this for code which is correct according
 525    to the relevant language specification but is likely to be buggy anyway.
 526    Returns true if the warning was printed, false if it was inhibited.  */
 527 bool
 528 warning (int opt, const char *gmsgid, ...)
 529 {
 530   diagnostic_info diagnostic;
 531   va_list ap;
 532
 533   va_start (ap, gmsgid);
 534   diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_WARNING);
 535   diagnostic.option_index = opt;
 536
 537   va_end (ap);
 538   return report_diagnostic (&diagnostic);
 539 }
 540
 541 /* A warning at LOCATION.  Use this for code which is correct according to the
 542    relevant language specification but is likely to be buggy anyway.
 543    Returns true if the warning was printed, false if it was inhibited.  */
 544
 545 bool
 546 warning_at (location_t location, int opt, const char *gmsgid, ...)
 547 {
 548   diagnostic_info diagnostic;
 549   va_list ap;
 550
 551   va_start (ap, gmsgid);
 552   diagnostic_set_info (&diagnostic, gmsgid, &ap, location, DK_WARNING);
 553   diagnostic.option_index = opt;
 554   va_end (ap);
 555   return report_diagnostic (&diagnostic);
 556 }
 557
 558 /* A "pedantic" warning at LOCATION: issues a warning unless
 559    -pedantic-errors was given on the command line, in which case it
 560    issues an error.  Use this for diagnostics required by the relevant
 561    language standard, if you have chosen not to make them errors.
 562
 563    Note that these diagnostics are issued independent of the setting
 564    of the -pedantic command-line switch.  To get a warning enabled
 565    only with that switch, use either "if (pedantic) pedwarn
 566    (OPT_pedantic,...)" or just "pedwarn (OPT_pedantic,..)".  To get a
 567    pedwarn independently of the -pedantic switch use "pedwarn (0,...)".
 568
 569    Returns true if the warning was printed, false if it was inhibited.  */
 570
 571 bool
 572 pedwarn (location_t location, int opt, const char *gmsgid, ...)
 573 {
 574   diagnostic_info diagnostic;
 575   va_list ap;
 576
 577   va_start (ap, gmsgid);
 578   diagnostic_set_info (&diagnostic, gmsgid, &ap, location,  DK_PEDWARN);
 579   diagnostic.option_index = opt;
 580   va_end (ap);
 581   return report_diagnostic (&diagnostic);
 582 }
 583
 584 /* A "permissive" error at LOCATION: issues an error unless
 585    -fpermissive was given on the command line, in which case it issues
 586    a warning.  Use this for things that really should be errors but we
 587    want to support legacy code.
 588
 589    Returns true if the warning was printed, false if it was inhibited.  */
 590
 591 bool
 592 permerror (location_t location, const char *gmsgid, ...)
 593 {
 594   diagnostic_info diagnostic;
 595   va_list ap;
 596
 597   va_start (ap, gmsgid);
 598   diagnostic_set_info (&diagnostic, gmsgid, &ap, location,
 599                        permissive_error_kind ());
 600   diagnostic.option_index = OPT_fpermissive;
 601   va_end (ap);
 602   return report_diagnostic (&diagnostic);
 603 }
 604
 605 /* A hard error: the code is definitely ill-formed, and an object file
 606    will not be produced.  */
 607 void
 608 error (const char *gmsgid, ...)
 609 {
 610   diagnostic_info diagnostic;
 611   va_list ap;
 612
 613   va_start (ap, gmsgid);
 614   diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_ERROR);
 615   report_diagnostic (&diagnostic);
 616   va_end (ap);
 617 }
 618
 619 /* Same as ebove, but use location LOC instead of input_location.  */
 620 void
 621 error_at (location_t loc, const char *gmsgid, ...)
 622 {
 623   diagnostic_info diagnostic;
 624   va_list ap;
 625
 626   va_start (ap, gmsgid);
 627   diagnostic_set_info (&diagnostic, gmsgid, &ap, loc, DK_ERROR);
 628   report_diagnostic (&diagnostic);
 629   va_end (ap);
 630 }
 631
 632 /* "Sorry, not implemented."  Use for a language feature which is
 633    required by the relevant specification but not implemented by GCC.
 634    An object file will not be produced.  */
 635 void
 636 sorry (const char *gmsgid, ...)
 637 {
 638   diagnostic_info diagnostic;
 639   va_list ap;
 640
 641   va_start (ap, gmsgid);
 642   diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_SORRY);
 643   report_diagnostic (&diagnostic);
 644   va_end (ap);
 645 }
 646
 647 /* An error which is severe enough that we make no attempt to
 648    continue.  Do not use this for internal consistency checks; that's
 649    internal_error.  Use of this function should be rare.  */
 650 void
 651 fatal_error (const char *gmsgid, ...)
 652 {
 653   diagnostic_info diagnostic;
 654   va_list ap;
 655
 656   va_start (ap, gmsgid);
 657   diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_FATAL);
 658   report_diagnostic (&diagnostic);
 659   va_end (ap);
 660
 661   gcc_unreachable ();
 662 }
 663
 664 /* An internal consistency check has failed.  We make no attempt to
 665    continue.  Note that unless there is debugging value to be had from
 666    a more specific message, or some other good reason, you should use
 667    abort () instead of calling this function directly.  */
 668 void
 669 internal_error (const char *gmsgid, ...)
 670 {
 671   diagnostic_info diagnostic;
 672   va_list ap;
 673
 674   va_start (ap, gmsgid);
 675   diagnostic_set_info (&diagnostic, gmsgid, &ap, input_location, DK_ICE);
 676   report_diagnostic (&diagnostic);
 677   va_end (ap);
 678
 679   gcc_unreachable ();
 680 }
 681 \f
 682 /* Special case error functions.  Most are implemented in terms of the
 683    above, or should be.  */
 684
 685 /* Print a diagnostic MSGID on FILE.  This is just fprintf, except it
 686    runs its second argument through gettext.  */
 687 void
 688 fnotice (FILE *file, const char *cmsgid, ...)
 689 {
 690   va_list ap;
 691
 692   va_start (ap, cmsgid);
 693   vfprintf (file, _(cmsgid), ap);
 694   va_end (ap);
 695 }
 696
 697 /* Inform the user that an error occurred while trying to report some
 698    other error.  This indicates catastrophic internal inconsistencies,
 699    so give up now.  But do try to flush out the previous error.
 700    This mustn't use internal_error, that will cause infinite recursion.  */
 701
 702 static void
 703 error_recursion (diagnostic_context *context)
 704 {
 705   diagnostic_info diagnostic;
 706
 707   if (context->lock < 3)
 708     pp_flush (context->printer);
 709
 710   fnotice (stderr,
 711            "Internal compiler error: Error reporting routines re-entered.\n");
 712
 713   /* Call diagnostic_action_after_output to get the "please submit a bug
 714      report" message.  It only looks at the kind field of diagnostic_info.  */
 715   diagnostic.kind = DK_ICE;
 716   diagnostic_action_after_output (context, &diagnostic);
 717
 718   /* Do not use gcc_unreachable here; that goes through internal_error
 719      and therefore would cause infinite recursion.  */
 720   real_abort ();
 721 }
 722
 723 /* Report an internal compiler error in a friendly manner.  This is
 724    the function that gets called upon use of abort() in the source
 725    code generally, thanks to a special macro.  */
 726
 727 void
 728 fancy_abort (const char *file, int line, const char *function)
 729 {
 730   internal_error ("in %s, at %s:%d", function, trim_filename (file), line);
 731 }
 732
 733 /* Really call the system 'abort'.  This has to go right at the end of
 734    this file, so that there are no functions after it that call abort
 735    and get the system abort instead of our macro.  */
 736 #undef abort
 737 static void
 738 real_abort (void)
 739 {
 740   abort ();
 741 }