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* Update copyright dates with scripts/update-copyrightsPaul Eggert2024-01-011-1/+1
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* libio: Add nonnull attribute for most FILE * arguments in stdio.hXi Ruoyao2023-09-261-6/+9
| | | | | | | | | | | | | | | | | | | | | | 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_SOURCEFrédéric Bérat2023-07-051-1/+1
| | | | | | | 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 definitionsFrédéric Bérat2023-07-051-0/+49
| | | | | | | | 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-copyrightsJoseph Myers2023-01-061-1/+1
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* Apply asm redirections in stdio.h before first use [BZ #27087]Tulio Magno Quites Machado Filho2022-07-141-0/+111
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>