gcc/errors.c

   1 /* Basic error reporting routines.
   2    Copyright (C) 1999-2019 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 HOST_GENERATOR_FILE
  25 #include "config.h"
  26 #define GENERATOR_FILE 1
  27 #else
  28 #include "bconfig.h"
  29 #endif
  30 #include "system.h"
  31 #include "errors.h"
  32
  33 /* Set this to argv[0] at the beginning of main.  */
  34
  35 const char *progname;
  36
  37 /* Starts out 0, set to 1 if error is called.  */
  38
  39 int have_error = 0;
  40
  41 /* Print a warning message - output produced, but there may be problems.  */
  42
  43 void
  44 warning (const char *format, ...)
  45 {
  46   va_list ap;
  47
  48   va_start (ap, format);
  49   fprintf (stderr, "%s: warning: ", progname);
  50   vfprintf (stderr, format, ap);
  51   va_end (ap);
  52   fputc ('\n', stderr);
  53 }
  54
  55
  56 /* Print an error message - we keep going but the output is unusable.  */
  57
  58 void
  59 error (const char *format, ...)
  60 {
  61   va_list ap;
  62
  63   va_start (ap, format);
  64   fprintf (stderr, "%s: ", progname);
  65   vfprintf (stderr, format, ap);
  66   va_end (ap);
  67   fputc ('\n', stderr);
  68
  69   have_error = 1;
  70 }
  71
  72
  73 /* Fatal error - terminate execution immediately.  Does not return.  */
  74
  75 void
  76 fatal (const char *format, ...)
  77 {
  78   va_list ap;
  79
  80   va_start (ap, format);
  81   fprintf (stderr, "%s: ", progname);
  82   vfprintf (stderr, format, ap);
  83   va_end (ap);
  84   fputc ('\n', stderr);
  85   exit (FATAL_EXIT_CODE);
  86 }
  87
  88 /* Similar, but say we got an internal error.  */
  89
  90 void
  91 internal_error (const char *format, ...)
  92 {
  93   va_list ap;
  94
  95   va_start (ap, format);
  96   fprintf (stderr, "%s: Internal error: ", progname);
  97   vfprintf (stderr, format, ap);
  98   va_end (ap);
  99   fputc ('\n', stderr);
 100   exit (FATAL_EXIT_CODE);
 101 }
 102
 103 /* Given a partial pathname as input, return another pathname that
 104    shares no directory elements with the pathname of __FILE__.  This
 105    is used by fancy_abort() to print `Internal compiler error in expr.c'
 106    instead of `Internal compiler error in ../../GCC/gcc/expr.c'.  This
 107    version is meant to be used for the gen* programs and therefor need not
 108    handle subdirectories.  */
 109
 110 const char *
 111 trim_filename (const char *name)
 112 {
 113   static const char this_file[] = __FILE__;
 114   const char *p = name, *q = this_file;
 115
 116   /* Skip any parts the two filenames have in common.  */
 117   while (*p == *q && *p != 0 && *q != 0)
 118     p++, q++;
 119
 120   /* Now go backwards until the previous directory separator.  */
 121   while (p > name && !IS_DIR_SEPARATOR (p[-1]))
 122     p--;
 123
 124   return p;
 125 }
 126
 127 /* "Fancy" abort.  Reports where in the compiler someone gave up.
 128    This file is used only by build programs, so we're not as polite as
 129    the version in diagnostic.c.  */
 130 void
 131 fancy_abort (const char *file, int line, const char *func)
 132 {
 133   internal_error ("abort in %s, at %s:%d", func, trim_filename (file), line);
 134 }