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improve out-of-bounds checking with GCC 10 attribute access [BZ #25219]

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Adds the access attribute newly introduced in GCC 10 to the subset of
function declarations that are already covered by _FORTIFY_SOURCE and
that don't have corresponding GCC built-in equivalents.

Reviewed-by: DJ Delorie <dj@redhat.com>
This commit is contained in:
Martin Sebor
2020-05-04 11:21:50 -06:00
parent 38c6788818
commit 06febd8c67
9 changed files with 146 additions and 82 deletions
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libio/stdio.h
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@@ -566,7 +566,7 @@ extern int putw (int __w, FILE *__stream);
This function is a possible cancellation point and therefore not
marked with __THROW. */
extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
__wur;
__wur __attr_access ((__write_only__, 1, 2));
#if __GLIBC_USE (DEPRECATED_GETS)
/* Get a newline-terminated string from stdin, removing the newline.
@@ -589,7 +589,8 @@ extern char *gets (char *__s) __wur __attribute_deprecated__;
or due to the implementation it is a cancellation point and
therefore not marked with __THROW. */
extern char *fgets_unlocked (char *__restrict __s, int __n,
FILE *__restrict __stream) __wur;
FILE *__restrict __stream) __wur
__attr_access ((__write_only__, 1, 2));
#endif