[PATCH] D80018: [Analyzer][StreamChecker] Added check for "indeterminate file position".

[Balázs Kéri via Phabricator via cfe-commits]

balazske created this revision.
Herald added subscribers: cfe-commits, ASDenysPetrov, martong, Charusso, gamesh411, dkrupp, donat.nagy, Szelethus, mikhail.ramalho, a.sidorin, szepet, baloghadamsoftware, xazax.hun.
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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`.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D80018

Files:
  clang/lib/StaticAnalyzer/Checkers/StreamChecker.cpp
  clang/test/Analysis/stream-error.c

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