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64b1a44183
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> |
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| types | ||
| stdio2-decl.h | ||
| stdio2.h | ||
| stdio-ldbl.h | ||
| stdio.h | ||