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| author | Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> | 2023-07-21 09:18:16 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2023-07-24 15:26:17 -0300 |
| commit | 85ac7edcdf67010c223541936243427213ac87a6 (patch) | |
| tree | e75c54059f5d1192a61e254ada9244014a0c52f9 | |
| parent | 2d472b48610f6a298d28035b683ab13e9afac4cb (diff) | |
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string: Fix bug-strncat1 with fortify enabled
If fortify is enabled, the truncated output warning is issued by
the wrapper itself:
bug-strncat1.c: In function ‘main’:
bug-strncat1.c:14:3: error: ‘__builtin___strncat_chk’ output truncated
copying 1 byte from a string of length 2 [-Werror=stringop-truncation]
14 | strncat (d, "\5\6", 1);
| ^
Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
| -rw-r--r-- | string/bug-strncat1.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/string/bug-strncat1.c b/string/bug-strncat1.c index 65a7ed58c2..cdd2141191 100644 --- a/string/bug-strncat1.c +++ b/string/bug-strncat1.c @@ -1,9 +1,16 @@ #undef __USE_STRING_INLINES #define __USE_STRING_INLINES +#include <sys/cdefs.h> +#include <libc-diag.h> +#if __GNUC_PREREQ (8, 0) +/* GCC warns about strncat truncating output; this is deliberately + tested here. If fortify is enabled, it is also triggered by the + wrappers. */ +DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-truncation"); +#endif #include <stdio.h> #include <stdlib.h> #include <string.h> -#include <libc-diag.h> char d[3] = "\0\1\2"; @@ -11,11 +18,6 @@ int main (void) { DIAG_PUSH_NEEDS_COMMENT; -#if __GNUC_PREREQ (8, 0) - /* GCC 8 warns about strncat truncating output; this is deliberately - tested here. */ - DIAG_IGNORE_NEEDS_COMMENT (8, "-Wstringop-truncation"); -#endif strncat (d, "\5\6", 1); DIAG_POP_NEEDS_COMMENT; if (d[0] != '\5') |