From 85ac7edcdf67010c223541936243427213ac87a6 Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Netto Date: Fri, 21 Jul 2023 09:18:16 -0300 Subject: string: Fix bug-strncat1 with fortify enabled MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- string/bug-strncat1.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'string') 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 +#include +#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 #include #include -#include 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') -- cgit 1.4.1