1 /* Checking vsprintf. 2 Copyright (C) 2005 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 2, or (at your option) any later 9 version. 10 11 In addition to the permissions in the GNU General Public License, the 12 Free Software Foundation gives you unlimited permission to link the 13 compiled version of this file into combinations with other programs, 14 and to distribute those combinations without any restriction coming 15 from the use of this file. (The General Public License restrictions 16 do apply in other respects; for example, they cover modification of 17 the file, and distribution when not linked into a combine 18 executable.) 19 20 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 21 WARRANTY; without even the implied warranty of MERCHANTABILITY or 22 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 23 for more details. 24 25 You should have received a copy of the GNU General Public License 26 along with GCC; see the file COPYING. If not, write to the Free 27 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 28 02110-1301, USA. */ 29 30 /* As a special exception, if you link this library with files compiled with 31 GCC to produce an executable, this does not cause the resulting executable 32 to be covered by the GNU General Public License. This exception does not 33 however invalidate any other reasons why the executable file might be 34 covered by the GNU General Public License. */ 35 36 #include "config.h" 37 #include <ssp/ssp.h> 38 #include <stdarg.h> 39 #ifdef HAVE_LIMITS_H 40 # include <limits.h> 41 #endif 42 #ifdef HAVE_STDIO_H 43 # include <stdio.h> 44 #endif 45 46 extern void __chk_fail (void) __attribute__((__noreturn__)); 47 48 #ifdef HAVE_USABLE_VSNPRINTF 49 int 50 __vsprintf_chk (char *s, int flags __attribute__((unused)), 51 size_t slen, const char *format, va_list arg) 52 { 53 int done; 54 55 if (slen > (size_t) INT_MAX) 56 done = vsprintf (s, format, arg); 57 else 58 { 59 done = vsnprintf (s, slen, format, arg); 60 if (done >= 0 && (size_t) done >= slen) 61 __chk_fail (); 62 } 63 return done; 64 } 65 #endif 66