Summary:
According to the standard, after a `wread` or `fwrite` call the file position
becomes "indeterminate". It is assumable that a next read or write causes
undefined behavior, so a (fatal error) warning is added for this case.
The indeterminate position can be cleared by some operations, for example
`fseek` or `freopen`, not with `clearerr`.
Reviewers: Szelethus, baloghadamsoftware, martong, NoQ, xazax.hun, dcoughlin
Reviewed By: Szelethus
Subscribers: rnkovacs, NoQ, xazax.hun, baloghadamsoftware, szepet, a.sidorin, mikhail.ramalho, Szelethus, donat.nagy, dkrupp, gamesh411, Charusso, martong, ASDenysPetrov, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D80018
Summary:
Stream functions `fread` and `fwrite` are evaluated
and preconditions checked.
A new bug type is added for a (non fatal) warning if `fread`
is called in EOF state.
Reviewers: Szelethus, NoQ, dcoughlin, baloghadamsoftware, martong, xazax.hun
Reviewed By: Szelethus
Subscribers: rnkovacs, xazax.hun, baloghadamsoftware, szepet, a.sidorin, mikhail.ramalho, Szelethus, donat.nagy, dkrupp, gamesh411, Charusso, martong, ASDenysPetrov, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D80015
The comment in Checkers.td explains whats going on. As StreamChecker grows,
expect a need to have smaller checkers out of it, but let that be a worry for
later.
Differential Revision: https://reviews.llvm.org/D78120
Balázs Kéri