gdbsupport/errors.h

   1 /* Declarations for error-reporting facilities.
   2
   3    Copyright (C) 1986-2023 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef COMMON_ERRORS_H
  21 #define COMMON_ERRORS_H
  22
  23 /* A problem was detected, but the requested operation can still
  24    proceed.  A warning message is constructed using a printf- or
  25    vprintf-style argument list.  The function "vwarning" must be
  26    provided by the client.  */
  27
  28 extern void warning (const char *fmt, ...)
  29      ATTRIBUTE_PRINTF (1, 2);
  30
  31 extern void vwarning (const char *fmt, va_list args)
  32      ATTRIBUTE_PRINTF (1, 0);
  33
  34 /* A non-predictable, non-fatal error was detected.  The requested
  35    operation cannot proceed.  An error message is constructed using
  36    a printf- or vprintf-style argument list.  These functions do not
  37    return.  The function "verror" must be provided by the client.  */
  38
  39 extern void error (const char *fmt, ...)
  40      ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (1, 2);
  41
  42 extern void verror (const char *fmt, va_list args)
  43      ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (1, 0);
  44
  45 /* An internal error was detected.  Internal errors indicate
  46    programming errors such as assertion failures, as opposed to
  47    more general errors beyond the application's control.  These
  48    functions do not return.  An error message is constructed using
  49    a printf- or vprintf-style argument list.  FILE and LINE
  50    indicate the file and line number where the programming error
  51    was detected.  Most client code should call the internal_error
  52    wrapper macro instead, which expands the source location
  53    automatically.  The function "internal_verror" must be provided
  54    by the client.  */
  55
  56 extern void internal_error_loc (const char *file, int line,
  57                                 const char *fmt, ...)
  58      ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (3, 4);
  59
  60 #define internal_error(fmt, ...)                                \
  61   internal_error_loc (__FILE__, __LINE__, fmt, ##__VA_ARGS__)
  62
  63 extern void internal_verror (const char *file, int line,
  64                              const char *fmt, va_list args)
  65      ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (3, 0);
  66
  67 /* An internal problem was detected, but the requested operation can
  68    still proceed.  Internal warnings indicate programming errors as
  69    opposed to more general issues beyond the application's control.
  70    A warning message is constructed using a printf- or vprintf-style
  71    argument list.  The function "internal_vwarning" must be provided
  72    by the client.  */
  73
  74 extern void internal_warning_loc (const char *file, int line,
  75                                   const char *fmt, ...)
  76      ATTRIBUTE_PRINTF (3, 4);
  77
  78 #define internal_warning(fmt, ...)                              \
  79   internal_warning_loc (__FILE__, __LINE__, fmt, ##__VA_ARGS__)
  80
  81 extern void internal_vwarning (const char *file, int line,
  82                                const char *fmt, va_list args)
  83      ATTRIBUTE_PRINTF (3, 0);
  84 \f
  85
  86 /* Return a newly allocated string, containing the PREFIX followed
  87    by the system error message for errno (separated by a colon).
  88    If ERRNUM is given, then use it in place of errno.  */
  89
  90 extern std::string perror_string (const char *prefix, int errnum = 0);
  91
  92 /* Like "error", but the error message is constructed by combining
  93    STRING with the system error message for errno.  If ERRNUM is given,
  94    then use it in place of errno.  This function does not return.  */
  95
  96 extern void perror_with_name (const char *string, int errnum = 0)
  97     ATTRIBUTE_NORETURN;
  98
  99 /* Call this function to handle memory allocation failures.  This
 100    function does not return.  This function must be provided by the
 101    client.  */
 102
 103 extern void malloc_failure (long size) ATTRIBUTE_NORETURN;
 104
 105 /* Flush stdout and stderr.  Must be provided by the client.  */
 106
 107 extern void flush_streams ();
 108
 109 #if defined(USE_WIN32API) || defined(__CYGWIN__)
 110
 111 /* Map the Windows error number in ERROR to a locale-dependent error
 112    message string and return a pointer to it.  Typically, the values
 113    for ERROR come from GetLastError.
 114
 115    The string pointed to shall not be modified by the application,
 116    but may be overwritten by a subsequent call to strwinerror
 117
 118    The strwinerror function does not change the current setting
 119    of GetLastError.  */
 120
 121 extern const char *strwinerror (ULONGEST error);
 122
 123 #endif /* USE_WIN32API */
 124
 125 #endif /* COMMON_ERRORS_H */