gcc/errors.c

   1 /* Basic error reporting routines.
   2    Copyright (C) 1999-2013 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 /* warning, error, and fatal.  These definitions are suitable for use
  21    in the generator programs; the compiler has a more elaborate suite
  22    of diagnostic printers, found in diagnostic.c.  */
  23
  24 #ifdef GENERATOR_FILE
  25 #include "bconfig.h"
  26 #else
  27 #include "config.h"
  28 #endif
  29 #include "system.h"
  30 #include "errors.h"
  31
  32 /* Set this to argv[0] at the beginning of main.  */
  33
  34 const char *progname;
  35
  36 /* Starts out 0, set to 1 if error is called.  */
  37
  38 int have_error = 0;
  39
  40 /* Print a warning message - output produced, but there may be problems.  */
  41
  42 void
  43 warning (const char *format, ...)
  44 {
  45   va_list ap;
  46
  47   va_start (ap, format);
  48   fprintf (stderr, "%s: warning: ", progname);
  49   vfprintf (stderr, format, ap);
  50   va_end (ap);
  51   fputc ('\n', stderr);
  52 }
  53
  54
  55 /* Print an error message - we keep going but the output is unusable.  */
  56
  57 void
  58 error (const char *format, ...)
  59 {
  60   va_list ap;
  61
  62   va_start (ap, format);
  63   fprintf (stderr, "%s: ", progname);
  64   vfprintf (stderr, format, ap);
  65   va_end (ap);
  66   fputc ('\n', stderr);
  67
  68   have_error = 1;
  69 }
  70
  71
  72 /* Fatal error - terminate execution immediately.  Does not return.  */
  73
  74 void
  75 fatal (const char *format, ...)
  76 {
  77   va_list ap;
  78
  79   va_start (ap, format);
  80   fprintf (stderr, "%s: ", progname);
  81   vfprintf (stderr, format, ap);
  82   va_end (ap);
  83   fputc ('\n', stderr);
  84   exit (FATAL_EXIT_CODE);
  85 }
  86
  87 /* Similar, but say we got an internal error.  */
  88
  89 void
  90 internal_error (const char *format, ...)
  91 {
  92   va_list ap;
  93
  94   va_start (ap, format);
  95   fprintf (stderr, "%s: Internal error: ", progname);
  96   vfprintf (stderr, format, ap);
  97   va_end (ap);
  98   fputc ('\n', stderr);
  99   exit (FATAL_EXIT_CODE);
 100 }
 101
 102 /* Given a partial pathname as input, return another pathname that
 103    shares no directory elements with the pathname of __FILE__.  This
 104    is used by fancy_abort() to print `Internal compiler error in expr.c'
 105    instead of `Internal compiler error in ../../GCC/gcc/expr.c'.  This
 106    version is meant to be used for the gen* programs and therefor need not
 107    handle subdirectories.  */
 108
 109 const char *
 110 trim_filename (const char *name)
 111 {
 112   static const char this_file[] = __FILE__;
 113   const char *p = name, *q = this_file;
 114
 115   /* Skip any parts the two filenames have in common.  */
 116   while (*p == *q && *p != 0 && *q != 0)
 117     p++, q++;
 118
 119   /* Now go backwards until the previous directory separator.  */
 120   while (p > name && !IS_DIR_SEPARATOR (p[-1]))
 121     p--;
 122
 123   return p;
 124 }
 125
 126 /* "Fancy" abort.  Reports where in the compiler someone gave up.
 127    This file is used only by build programs, so we're not as polite as
 128    the version in diagnostic.c.  */
 129 void
 130 fancy_abort (const char *file, int line, const char *func)
 131 {
 132   internal_error ("abort in %s, at %s:%d", func, trim_filename (file), line);
 133 }