1 /* Language-independent diagnostic subroutines for the GNU Compiler Collection
2 Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004
3 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 2, 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 COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
24 /* This file implements the language independent aspect of diagnostic
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
40 #include "diagnostic.h"
41 #include "langhooks.h"
42 #include "langhooks-def.h"
46 static char *build_message_string (const char *, ...) ATTRIBUTE_PRINTF_1;
48 static void default_diagnostic_starter (diagnostic_context *,
50 static void default_diagnostic_finalizer (diagnostic_context *,
53 static void error_recursion (diagnostic_context *) ATTRIBUTE_NORETURN;
54 static bool text_specifies_location (text_info *, location_t *);
55 static bool diagnostic_count_diagnostic (diagnostic_context *,
57 static void diagnostic_action_after_output (diagnostic_context *,
59 static void real_abort (void) ATTRIBUTE_NORETURN;
61 /* A diagnostic_context surrogate for stderr. */
62 static diagnostic_context global_diagnostic_context;
63 diagnostic_context *global_dc = &global_diagnostic_context;
65 /* Boilerplate text used in two locations. */
66 #define bug_report_request \
67 "Please submit a full bug report,\n\
68 with preprocessed source if appropriate.\n\
69 See %s for instructions.\n"
71 int flag_fatal_errors = 0;
73 /* Return a malloc'd string containing MSG formatted a la printf. The
74 caller is responsible for freeing the memory. */
76 build_message_string (const char *msg, ...)
82 vasprintf (&str, msg, ap);
88 /* Same as diagnostic_build_prefix, but only the source FILE is given. */
90 file_name_as_prefix (const char *f)
92 return build_message_string ("%s: ", f);
97 /* Initialize the diagnostic message outputting machinery. */
99 diagnostic_initialize (diagnostic_context *context)
101 /* Allocate a basic pretty-printer. Clients will replace this a
102 much more elaborated pretty-printer if they wish. */
103 context->printer = xmalloc (sizeof (pretty_printer));
104 pp_construct (context->printer, NULL, 0);
105 /* By default, diagnostics are sent to stderr. */
106 context->printer->buffer->stream = stderr;
107 /* By default, we emit prefixes once per message. */
108 context->printer->prefixing_rule = DIAGNOSTICS_SHOW_PREFIX_ONCE;
110 memset (context->diagnostic_count, 0, sizeof context->diagnostic_count);
111 context->warnings_are_errors_message = warnings_are_errors;
112 context->abort_on_error = false;
113 context->internal_error = NULL;
114 diagnostic_starter (context) = default_diagnostic_starter;
115 diagnostic_finalizer (context) = default_diagnostic_finalizer;
116 context->last_module = 0;
117 context->last_function = NULL;
119 context->x_data = NULL;
122 /* Returns true if the next format specifier in TEXT is a format specifier
123 for a location_t. If so, update the object pointed by LOCUS to reflect
124 the specified location in *TEXT->args_ptr. */
126 text_specifies_location (text_info *text, location_t *locus)
129 /* Skip any leading text. */
130 for (p = text->format_spec; *p && *p != '%'; ++p)
133 /* Extract the location information if any. */
134 if (p[0] == '%' && p[1] == 'H')
136 *locus = *va_arg (*text->args_ptr, location_t *);
137 text->format_spec = p + 2;
140 else if (p[0] == '%' && p[1] == 'J')
142 tree t = va_arg (*text->args_ptr, tree);
143 *locus = DECL_SOURCE_LOCATION (t);
144 text->format_spec = p + 2;
152 diagnostic_set_info (diagnostic_info *diagnostic, const char *msgid,
153 va_list *args, location_t location,
156 diagnostic->message.err_no = errno;
157 diagnostic->message.args_ptr = args;
158 diagnostic->message.format_spec = _(msgid);
159 /* If the diagnostic message doesn't specify a location,
161 if (!text_specifies_location (&diagnostic->message, &diagnostic->location))
162 diagnostic->location = location;
163 diagnostic->kind = kind;
166 /* Return a malloc'd string describing a location. The caller is
167 responsible for freeing the memory. */
169 diagnostic_build_prefix (diagnostic_info *diagnostic)
171 static const char *const diagnostic_kind_text[] = {
172 #define DEFINE_DIAGNOSTIC_KIND(K, T) (T),
173 #include "diagnostic.def"
174 #undef DEFINE_DIAGNOSTIC_KIND
177 if (diagnostic->kind >= DK_LAST_DIAGNOSTIC_KIND)
180 return diagnostic->location.file
181 ? build_message_string ("%s:%d: %s",
182 diagnostic->location.file,
183 diagnostic->location.line,
184 _(diagnostic_kind_text[diagnostic->kind]))
185 : build_message_string ("%s: %s", progname,
186 _(diagnostic_kind_text[diagnostic->kind]));
189 /* Count a diagnostic. Return true if the message should be printed. */
191 diagnostic_count_diagnostic (diagnostic_context *context,
192 diagnostic_info *diagnostic)
194 diagnostic_t kind = diagnostic->kind;
202 #ifndef ENABLE_CHECKING
203 /* When not checking, ICEs are converted to fatal errors when an
204 error has already occurred. This is counteracted by
206 if ((diagnostic_kind_count (context, DK_ERROR) > 0
207 || diagnostic_kind_count (context, DK_SORRY) > 0)
208 && !context->abort_on_error)
210 fnotice (stderr, "%s:%d: confused by earlier errors, bailing out\n",
211 diagnostic->location.file, diagnostic->location.line);
212 exit (FATAL_EXIT_CODE);
215 if (context->internal_error)
216 (*context->internal_error) (diagnostic->message.format_spec,
217 diagnostic->message.args_ptr);
220 case DK_FATAL: case DK_SORRY:
221 case DK_ANACHRONISM: case DK_NOTE:
222 ++diagnostic_kind_count (context, kind);
226 if (!diagnostic_report_warnings_p ())
229 if (!warnings_are_errors)
231 ++diagnostic_kind_count (context, DK_WARNING);
235 if (context->warnings_are_errors_message)
237 pp_verbatim (context->printer,
238 "%s: warnings being treated as errors\n", progname);
239 context->warnings_are_errors_message = false;
242 /* And fall through. */
244 ++diagnostic_kind_count (context, DK_ERROR);
251 /* Take any action which is expected to happen after the diagnostic
252 is written out. This function does not always return. */
254 diagnostic_action_after_output (diagnostic_context *context,
255 diagnostic_info *diagnostic)
257 switch (diagnostic->kind)
267 if (context->abort_on_error)
269 if (flag_fatal_errors)
271 fnotice (stderr, "compilation terminated due to -Wfatal-errors.\n");
272 exit (FATAL_EXIT_CODE);
277 if (context->abort_on_error)
280 fnotice (stderr, bug_report_request, bug_report_url);
281 exit (FATAL_EXIT_CODE);
284 if (context->abort_on_error)
287 fnotice (stderr, "compilation terminated.\n");
288 exit (FATAL_EXIT_CODE);
295 /* Prints out, if necessary, the name of the current function
296 that caused an error. Called from all error and warning functions.
297 We ignore the FILE parameter, as it cannot be relied upon. */
300 diagnostic_report_current_function (diagnostic_context *context)
302 diagnostic_report_current_module (context);
303 lang_hooks.print_error_function (context, input_filename);
307 diagnostic_report_current_module (diagnostic_context *context)
309 struct file_stack *p;
311 if (pp_needs_newline (context->printer))
313 pp_newline (context->printer);
314 pp_needs_newline (context->printer) = false;
317 if (input_file_stack && diagnostic_last_module_changed (context))
319 p = input_file_stack;
320 pp_verbatim (context->printer,
321 "In file included from %s:%d",
322 p->location.file, p->location.line);
323 while ((p = p->next) != NULL)
324 pp_verbatim (context->printer,
326 p->location.file, p->location.line);
327 pp_verbatim (context->printer, ":\n");
328 diagnostic_set_last_module (context);
333 default_diagnostic_starter (diagnostic_context *context,
334 diagnostic_info *diagnostic)
336 diagnostic_report_current_function (context);
337 pp_set_prefix (context->printer, diagnostic_build_prefix (diagnostic));
341 default_diagnostic_finalizer (diagnostic_context *context,
342 diagnostic_info *diagnostic __attribute__((unused)))
344 pp_destroy_prefix (context->printer);
347 /* Report a diagnostic message (an error or a warning) as specified by
348 DC. This function is *the* subroutine in terms of which front-ends
349 should implement their specific diagnostic handling modules. The
350 front-end independent format specifiers are exactly those described
351 in the documentation of output_format. */
354 diagnostic_report_diagnostic (diagnostic_context *context,
355 diagnostic_info *diagnostic)
357 if (context->lock++ && diagnostic->kind < DK_SORRY)
358 error_recursion (context);
360 if (diagnostic_count_diagnostic (context, diagnostic))
362 (*diagnostic_starter (context)) (context, diagnostic);
363 pp_format_text (context->printer, &diagnostic->message);
364 (*diagnostic_finalizer (context)) (context, diagnostic);
365 pp_flush (context->printer);
366 diagnostic_action_after_output (context, diagnostic);
372 /* Given a partial pathname as input, return another pathname that
373 shares no directory elements with the pathname of __FILE__. This
374 is used by fancy_abort() to print `Internal compiler error in expr.c'
375 instead of `Internal compiler error in ../../GCC/gcc/expr.c'. */
378 trim_filename (const char *name)
380 static const char this_file[] = __FILE__;
381 const char *p = name, *q = this_file;
383 /* First skip any "../" in each filename. This allows us to give a proper
384 reference to a file in a subdirectory. */
385 while (p[0] == '.' && p[1] == '.'
386 && (p[2] == DIR_SEPARATOR
387 #ifdef DIR_SEPARATOR_2
388 || p[2] == DIR_SEPARATOR_2
393 while (q[0] == '.' && q[1] == '.'
394 && (q[2] == DIR_SEPARATOR
395 #ifdef DIR_SEPARATOR_2
396 || p[2] == DIR_SEPARATOR_2
401 /* Now skip any parts the two filenames have in common. */
402 while (*p == *q && *p != 0 && *q != 0)
405 /* Now go backwards until the previous directory separator. */
406 while (p > name && p[-1] != DIR_SEPARATOR
407 #ifdef DIR_SEPARATOR_2
408 && p[-1] != DIR_SEPARATOR_2
416 /* Standard error reporting routines in increasing order of severity.
417 All of these take arguments like printf. */
419 /* Text to be emitted verbatim to the error message stream; this
420 produces no prefix and disables line-wrapping. Use rarely. */
422 verbatim (const char *msgid, ...)
427 va_start (ap, msgid);
430 text.format_spec = _(msgid);
431 pp_format_verbatim (global_dc->printer, &text);
432 pp_flush (global_dc->printer);
436 /* An informative note. Use this for additional details on an error
439 inform (const char *msgid, ...)
441 diagnostic_info diagnostic;
444 va_start (ap, msgid);
445 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_NOTE);
446 report_diagnostic (&diagnostic);
450 /* A warning. Use this for code which is correct according to the
451 relevant language specification but is likely to be buggy anyway. */
453 warning (const char *msgid, ...)
455 diagnostic_info diagnostic;
458 va_start (ap, msgid);
459 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_WARNING);
460 report_diagnostic (&diagnostic);
464 /* A "pedantic" warning: issues a warning unless -pedantic-errors was
465 given on the command line, in which case it issues an error. Use
466 this for diagnostics required by the relevant language standard,
467 if you have chosen not to make them errors.
469 Note that these diagnostics are issued independent of the setting
470 of the -pedantic command-line switch. To get a warning enabled
471 only with that switch, write "if (pedantic) pedwarn (...);" */
473 pedwarn (const char *msgid, ...)
475 diagnostic_info diagnostic;
478 va_start (ap, msgid);
479 diagnostic_set_info (&diagnostic, msgid, &ap, input_location,
480 pedantic_error_kind ());
481 report_diagnostic (&diagnostic);
485 /* A hard error: the code is definitely ill-formed, and an object file
486 will not be produced. */
488 error (const char *msgid, ...)
490 diagnostic_info diagnostic;
493 va_start (ap, msgid);
494 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_ERROR);
495 report_diagnostic (&diagnostic);
499 /* "Sorry, not implemented." Use for a language feature which is
500 required by the relevant specification but not implemented by GCC.
501 An object file will not be produced. */
503 sorry (const char *msgid, ...)
505 diagnostic_info diagnostic;
508 va_start (ap, msgid);
509 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_SORRY);
510 report_diagnostic (&diagnostic);
514 /* An error which is severe enough that we make no attempt to
515 continue. Do not use this for internal consistency checks; that's
516 internal_error. Use of this function should be rare. */
518 fatal_error (const char *msgid, ...)
520 diagnostic_info diagnostic;
523 va_start (ap, msgid);
524 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_FATAL);
525 report_diagnostic (&diagnostic);
532 /* An internal consistency check has failed. We make no attempt to
533 continue. Note that unless there is debugging value to be had from
534 a more specific message, or some other good reason, you should use
535 abort () instead of calling this function directly. */
537 internal_error (const char *msgid, ...)
539 diagnostic_info diagnostic;
542 va_start (ap, msgid);
543 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_ICE);
544 report_diagnostic (&diagnostic);
551 /* Special case error functions. Most are implemented in terms of the
552 above, or should be. */
554 /* Print a diagnostic MSGID on FILE. This is just fprintf, except it
555 runs its second argument through gettext. */
557 fnotice (FILE *file, const char *msgid, ...)
561 va_start (ap, msgid);
562 vfprintf (file, _(msgid), ap);
566 /* Inform the user that an error occurred while trying to report some
567 other error. This indicates catastrophic internal inconsistencies,
568 so give up now. But do try to flush out the previous error.
569 This mustn't use internal_error, that will cause infinite recursion. */
572 error_recursion (diagnostic_context *context)
574 if (context->lock < 3)
575 pp_flush (context->printer);
578 "Internal compiler error: Error reporting routines re-entered.\n");
579 fnotice (stderr, bug_report_request, bug_report_url);
580 exit (FATAL_EXIT_CODE);
583 /* Report an internal compiler error in a friendly manner. This is
584 the function that gets called upon use of abort() in the source
585 code generally, thanks to a special macro. */
588 fancy_abort (const char *file, int line, const char *function)
590 internal_error ("in %s, at %s:%d", function, trim_filename (file), line);
593 /* Really call the system 'abort'. This has to go right at the end of
594 this file, so that there are no functions after it that call abort
595 and get the system abort instead of our macro. */