1 /* Language-independent diagnostic subroutines for the GNU Compiler Collection
2 Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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"
38 #include "diagnostic.h"
39 #include "langhooks.h"
40 #include "langhooks-def.h"
44 static char *build_message_string (const char *, ...) ATTRIBUTE_PRINTF_1;
46 static void default_diagnostic_starter (diagnostic_context *,
48 static void default_diagnostic_finalizer (diagnostic_context *,
51 static void error_recursion (diagnostic_context *) ATTRIBUTE_NORETURN;
52 static bool text_specifies_location (text_info *, location_t *);
53 static bool diagnostic_count_diagnostic (diagnostic_context *,
55 static void diagnostic_action_after_output (diagnostic_context *,
57 static void real_abort (void) ATTRIBUTE_NORETURN;
59 /* A diagnostic_context surrogate for stderr. */
60 static diagnostic_context global_diagnostic_context;
61 diagnostic_context *global_dc = &global_diagnostic_context;
63 /* Boilerplate text used in two locations. */
64 #define bug_report_request \
65 "Please submit a full bug report,\n\
66 with preprocessed source if appropriate.\n\
67 See %s for instructions.\n"
70 /* Return a malloc'd string containing MSG formatted a la printf. The
71 caller is responsible for freeing the memory. */
73 build_message_string (const char *msg, ...)
79 vasprintf (&str, msg, ap);
85 /* Same as diagnostic_build_prefix, but only the source FILE is given. */
87 file_name_as_prefix (const char *f)
89 return build_message_string ("%s: ", f);
94 /* Initialize the diagnostic message outputting machinery. */
96 diagnostic_initialize (diagnostic_context *context)
98 /* Allocate a basic pretty-printer. Clients will replace this a
99 much more elaborated pretty-printer if they wish. */
100 context->printer = xmalloc (sizeof (pretty_printer));
101 pp_construct (context->printer, NULL, 0);
102 /* By default, diagnostics are sent to stderr. */
103 context->printer->buffer->stream = stderr;
104 /* By default, we emit prefixes once per message. */
105 context->printer->prefixing_rule = DIAGNOSTICS_SHOW_PREFIX_ONCE;
107 memset (context->diagnostic_count, 0, sizeof context->diagnostic_count);
108 context->warnings_are_errors_message = warnings_are_errors;
109 context->abort_on_error = false;
110 context->internal_error = NULL;
111 diagnostic_starter (context) = default_diagnostic_starter;
112 diagnostic_finalizer (context) = default_diagnostic_finalizer;
113 context->last_module = 0;
114 context->last_function = NULL;
116 context->x_data = NULL;
119 /* Returns true if the next format specifier in TEXT is a format specifier
120 for a location_t. If so, update the object pointed by LOCUS to reflect
121 the specified location in *TEXT->args_ptr. */
123 text_specifies_location (text_info *text, location_t *locus)
126 /* Skip any leading text. */
127 for (p = text->format_spec; *p && *p != '%'; ++p)
130 /* Extract the location information if any. */
131 if (p[0] == '%' && p[1] == 'H')
133 *locus = *va_arg (*text->args_ptr, location_t *);
134 text->format_spec = p + 2;
137 else if (p[0] == '%' && p[1] == 'J')
139 tree t = va_arg (*text->args_ptr, tree);
140 *locus = DECL_SOURCE_LOCATION (t);
141 text->format_spec = p + 2;
149 diagnostic_set_info (diagnostic_info *diagnostic, const char *msgid,
150 va_list *args, location_t location,
153 diagnostic->message.err_no = errno;
154 diagnostic->message.args_ptr = args;
155 diagnostic->message.format_spec = _(msgid);
156 /* If the diagnostic message doesn't specify a location,
158 if (!text_specifies_location (&diagnostic->message, &diagnostic->location))
159 diagnostic->location = location;
160 diagnostic->kind = kind;
163 /* Return a malloc'd string describing a location. The caller is
164 responsible for freeing the memory. */
166 diagnostic_build_prefix (diagnostic_info *diagnostic)
168 static const char *const diagnostic_kind_text[] = {
169 #define DEFINE_DIAGNOSTIC_KIND(K, T) (T),
170 #include "diagnostic.def"
171 #undef DEFINE_DIAGNOSTIC_KIND
174 if (diagnostic->kind >= DK_LAST_DIAGNOSTIC_KIND)
177 return diagnostic->location.file
178 ? build_message_string ("%s:%d: %s",
179 diagnostic->location.file,
180 diagnostic->location.line,
181 _(diagnostic_kind_text[diagnostic->kind]))
182 : build_message_string ("%s: %s", progname,
183 _(diagnostic_kind_text[diagnostic->kind]));
186 /* Count a diagnostic. Return true if the message should be printed. */
188 diagnostic_count_diagnostic (diagnostic_context *context,
189 diagnostic_info *diagnostic)
191 diagnostic_t kind = diagnostic->kind;
199 #ifndef ENABLE_CHECKING
200 /* When not checking, ICEs are converted to fatal errors when an
201 error has already occurred. This is counteracted by
203 if ((diagnostic_kind_count (context, DK_ERROR) > 0
204 || diagnostic_kind_count (context, DK_SORRY) > 0)
205 && !context->abort_on_error)
207 fnotice (stderr, "%s:%d: confused by earlier errors, bailing out\n",
208 diagnostic->location.file, diagnostic->location.line);
209 exit (FATAL_EXIT_CODE);
212 if (context->internal_error)
213 (*context->internal_error) (diagnostic->message.format_spec,
214 diagnostic->message.args_ptr);
217 case DK_FATAL: case DK_SORRY:
218 case DK_ANACHRONISM: case DK_NOTE:
219 ++diagnostic_kind_count (context, kind);
223 if (!diagnostic_report_warnings_p ())
226 if (!warnings_are_errors)
228 ++diagnostic_kind_count (context, DK_WARNING);
232 if (context->warnings_are_errors_message)
234 pp_verbatim (context->printer,
235 "%s: warnings being treated as errors\n", progname);
236 context->warnings_are_errors_message = false;
239 /* And fall through. */
241 ++diagnostic_kind_count (context, DK_ERROR);
248 /* Take any action which is expected to happen after the diagnostic
249 is written out. This function does not always return. */
251 diagnostic_action_after_output (diagnostic_context *context,
252 diagnostic_info *diagnostic)
254 switch (diagnostic->kind)
264 if (context->abort_on_error)
269 if (context->abort_on_error)
272 fnotice (stderr, bug_report_request, bug_report_url);
273 exit (FATAL_EXIT_CODE);
276 if (context->abort_on_error)
279 fnotice (stderr, "compilation terminated.\n");
280 exit (FATAL_EXIT_CODE);
287 /* Prints out, if necessary, the name of the current function
288 that caused an error. Called from all error and warning functions.
289 We ignore the FILE parameter, as it cannot be relied upon. */
292 diagnostic_report_current_function (diagnostic_context *context)
294 diagnostic_report_current_module (context);
295 (*lang_hooks.print_error_function) (context, input_filename);
299 diagnostic_report_current_module (diagnostic_context *context)
301 struct file_stack *p;
303 if (pp_needs_newline (context->printer))
305 pp_newline (context->printer);
306 pp_needs_newline (context->printer) = false;
309 if (input_file_stack && diagnostic_last_module_changed (context))
311 p = input_file_stack;
312 pp_verbatim (context->printer,
313 "In file included from %s:%d",
314 p->location.file, p->location.line);
315 while ((p = p->next) != NULL)
316 pp_verbatim (context->printer,
318 p->location.file, p->location.line);
319 pp_verbatim (context->printer, ":\n");
320 diagnostic_set_last_module (context);
325 default_diagnostic_starter (diagnostic_context *context,
326 diagnostic_info *diagnostic)
328 diagnostic_report_current_function (context);
329 pp_set_prefix (context->printer, diagnostic_build_prefix (diagnostic));
333 default_diagnostic_finalizer (diagnostic_context *context,
334 diagnostic_info *diagnostic __attribute__((unused)))
336 pp_destroy_prefix (context->printer);
339 /* Report a diagnostic message (an error or a warning) as specified by
340 DC. This function is *the* subroutine in terms of which front-ends
341 should implement their specific diagnostic handling modules. The
342 front-end independent format specifiers are exactly those described
343 in the documentation of output_format. */
346 diagnostic_report_diagnostic (diagnostic_context *context,
347 diagnostic_info *diagnostic)
349 if (context->lock++ && diagnostic->kind < DK_SORRY)
350 error_recursion (context);
352 if (diagnostic_count_diagnostic (context, diagnostic))
354 (*diagnostic_starter (context)) (context, diagnostic);
355 pp_format_text (context->printer, &diagnostic->message);
356 (*diagnostic_finalizer (context)) (context, diagnostic);
357 pp_flush (context->printer);
358 diagnostic_action_after_output (context, diagnostic);
364 /* Given a partial pathname as input, return another pathname that
365 shares no directory elements with the pathname of __FILE__. This
366 is used by fancy_abort() to print `Internal compiler error in expr.c'
367 instead of `Internal compiler error in ../../GCC/gcc/expr.c'. */
370 trim_filename (const char *name)
372 static const char this_file[] = __FILE__;
373 const char *p = name, *q = this_file;
375 /* First skip any "../" in each filename. This allows us to give a proper
376 reference to a file in a subdirectory. */
377 while (p[0] == '.' && p[1] == '.'
378 && (p[2] == DIR_SEPARATOR
379 #ifdef DIR_SEPARATOR_2
380 || p[2] == DIR_SEPARATOR_2
385 while (q[0] == '.' && q[1] == '.'
386 && (q[2] == DIR_SEPARATOR
387 #ifdef DIR_SEPARATOR_2
388 || p[2] == DIR_SEPARATOR_2
393 /* Now skip any parts the two filenames have in common. */
394 while (*p == *q && *p != 0 && *q != 0)
397 /* Now go backwards until the previous directory separator. */
398 while (p > name && p[-1] != DIR_SEPARATOR
399 #ifdef DIR_SEPARATOR_2
400 && p[-1] != DIR_SEPARATOR_2
408 /* Standard error reporting routines in increasing order of severity.
409 All of these take arguments like printf. */
411 /* Text to be emitted verbatim to the error message stream; this
412 produces no prefix and disables line-wrapping. Use rarely. */
414 verbatim (const char *msgid, ...)
419 va_start (ap, msgid);
422 text.format_spec = _(msgid);
423 pp_format_verbatim (global_dc->printer, &text);
424 pp_flush (global_dc->printer);
428 /* An informative note. Use this for additional details on an error
431 inform (const char *msgid, ...)
433 diagnostic_info diagnostic;
436 va_start (ap, msgid);
437 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_NOTE);
438 report_diagnostic (&diagnostic);
442 /* A warning. Use this for code which is correct according to the
443 relevant language specification but is likely to be buggy anyway. */
445 warning (const char *msgid, ...)
447 diagnostic_info diagnostic;
450 va_start (ap, msgid);
451 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_WARNING);
452 report_diagnostic (&diagnostic);
456 /* A "pedantic" warning: issues a warning unless -pedantic-errors was
457 given on the command line, in which case it issues an error. Use
458 this for diagnostics required by the relevant language standard,
459 if you have chosen not to make them errors.
461 Note that these diagnostics are issued independent of the setting
462 of the -pedantic command-line switch. To get a warning enabled
463 only with that switch, write "if (pedantic) pedwarn (...);" */
465 pedwarn (const char *msgid, ...)
467 diagnostic_info diagnostic;
470 va_start (ap, msgid);
471 diagnostic_set_info (&diagnostic, msgid, &ap, input_location,
472 pedantic_error_kind ());
473 report_diagnostic (&diagnostic);
477 /* A hard error: the code is definitely ill-formed, and an object file
478 will not be produced. */
480 error (const char *msgid, ...)
482 diagnostic_info diagnostic;
485 va_start (ap, msgid);
486 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_ERROR);
487 report_diagnostic (&diagnostic);
491 /* "Sorry, not implemented." Use for a language feature which is
492 required by the relevant specification but not implemented by GCC.
493 An object file will not be produced. */
495 sorry (const char *msgid, ...)
497 diagnostic_info diagnostic;
500 va_start (ap, msgid);
501 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_SORRY);
502 report_diagnostic (&diagnostic);
506 /* An error which is severe enough that we make no attempt to
507 continue. Do not use this for internal consistency checks; that's
508 internal_error. Use of this function should be rare. */
510 fatal_error (const char *msgid, ...)
512 diagnostic_info diagnostic;
515 va_start (ap, msgid);
516 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_FATAL);
517 report_diagnostic (&diagnostic);
524 /* An internal consistency check has failed. We make no attempt to
525 continue. Note that unless there is debugging value to be had from
526 a more specific message, or some other good reason, you should use
527 abort () instead of calling this function directly. */
529 internal_error (const char *msgid, ...)
531 diagnostic_info diagnostic;
534 va_start (ap, msgid);
535 diagnostic_set_info (&diagnostic, msgid, &ap, input_location, DK_ICE);
536 report_diagnostic (&diagnostic);
543 /* Special case error functions. Most are implemented in terms of the
544 above, or should be. */
546 /* Print a diagnostic MSGID on FILE. This is just fprintf, except it
547 runs its second argument through gettext. */
549 fnotice (FILE *file, const char *msgid, ...)
553 va_start (ap, msgid);
554 vfprintf (file, _(msgid), ap);
558 /* Inform the user that an error occurred while trying to report some
559 other error. This indicates catastrophic internal inconsistencies,
560 so give up now. But do try to flush out the previous error.
561 This mustn't use internal_error, that will cause infinite recursion. */
564 error_recursion (diagnostic_context *context)
566 if (context->lock < 3)
567 pp_flush (context->printer);
570 "Internal compiler error: Error reporting routines re-entered.\n");
571 fnotice (stderr, bug_report_request, bug_report_url);
572 exit (FATAL_EXIT_CODE);
575 /* Report an internal compiler error in a friendly manner. This is
576 the function that gets called upon use of abort() in the source
577 code generally, thanks to a special macro. */
580 fancy_abort (const char *file, int line, const char *function)
582 internal_error ("in %s, at %s:%d", function, trim_filename (file), line);
585 /* Really call the system 'abort'. This has to go right at the end of
586 this file, so that there are no functions after it that call abort
587 and get the system abort instead of our macro. */