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77008252 JJ |
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 | |
cf398b1e KC |
27 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
28 | 02110-1301, USA. */ | |
77008252 JJ |
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 |