user/sven/glibc.git/libio/bits/stdio2-decl.h, branch masterGNU C Library
https://git.stealer.net/cgit.cgi/user/sven/glibc.git/atom?h=master2026-01-01T21:42:29ZUpdate copyright dates with scripts/update-copyrights2026-01-01T21:42:29ZPaul Eggerteggert@cs.ucla.edu2026-01-01T17:32:02Zurn:sha1:66f3e9219d8f86b977d9be04ad469b5d72af0da2Update copyright dates with scripts/update-copyrights2025-01-01T19:22:09ZPaul Eggerteggert@cs.ucla.edu2025-01-01T18:14:45Zurn:sha1:2642002380aafb71a1d3b569b6d7ebeab3284816Update copyright dates with scripts/update-copyrights2024-01-01T18:53:40ZPaul Eggerteggert@cs.ucla.edu2024-01-01T18:12:26Zurn:sha1:dff8da6b3e89b986bb7f6b1ec18cf65d5972e307libio: Add nonnull attribute for most FILE * arguments in stdio.h2023-09-27T00:11:38ZXi Ruoyaoxry111@xry111.site2023-09-25T11:53:26Zurn:sha1:64b1a44183a3094672ed304532bedb9acc707554
During the review of a GCC analyzer test case, we found most stdio
functions accepting a FILE * argument expect it to be nonnull and just
segfault when the argument is NULL. Add nonnull attribute for them.
fflush and fflush_unlocked are well defined when __stream is NULL so
they are not touched.
For fputs, fgets, fread, fwrite, fprintf, vfprintf, and their unlocked
version, if __stream is empty but there is nothing to read or write,
they did not segfault. But the standard disallow __stream to be empty
here, so nonnull attribute is also added for them. Note that this may
blow up some old code already subtly broken.
Also add __nonnull for _chk variants and __fortify_function versions for
them.
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Reviewed-by: Alejandro Colomar <alx@kernel.org>
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
libio/bits/stdio2-decl.h: Avoid PLT entries with _FORTIFY_SOURCE2023-07-05T14:59:48ZFrédéric Bératfberat@redhat.com2023-06-28T07:08:44Zurn:sha1:923b53e920ad069599ca691dbab477ae26d6f02b
The change is meant to avoid unwanted PLT entry for the fgets_unlocked
routine when _FORTIFY_SOURCE is set.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
libio/bits/stdio2.h: Clearly separate declaration from definitions2023-07-05T14:59:48ZFrédéric Bératfberat@redhat.com2023-06-28T07:07:26Zurn:sha1:840dc610c8ff8d53e0f41239e5b875c8175dc791
Move declarations from libio/bits/stdio.h to existing
libio/bits/stdio2-decl.h. This will enable future use of
__REDIRECT_FORTIFY in place of some __REDIRECT.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Update copyright dates with scripts/update-copyrights2023-01-06T21:14:39ZJoseph Myersjoseph@codesourcery.com2023-01-06T21:08:04Zurn:sha1:6d7e8eda9b85b08f207a6dc6f187e94e4817270fApply asm redirections in stdio.h before first use [BZ #27087]2022-07-14T19:01:14ZTulio Magno Quites Machado Filhotuliom@linux.ibm.com2022-07-07T21:12:58Zurn:sha1:d0fa09a7701956036ff36f8ca188e9fff81553d8
Compilers may not be able to apply asm redirections to functions after
these functions are used for the first time, e.g. clang 13.
Fix [BZ #27087] by applying all long double-related asm redirections
before using functions in bits/stdio.h.
However, as these asm redirections depend on the declarations provided
by libio/bits/stdio2.h, this header was split in 2:
- libio/bits/stdio2-decl.h contains all function declarations;
- libio/bits/stdio2.h remains with the remaining contents, including
redirections.
This also adds the access attribute to __vsnprintf_chk that was missing.
Tested with build-many-glibcs.py.
Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>