[PATCH] D154838: [analyzer] Add check for null pointer passed to %p of printf family
Georgiy Lebedev via Phabricator via cfe-commits
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Mon Jul 10 05:58:00 PDT 2023
CuriousGeorgiy created this revision.
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Add a new check to the UnixAPI portability checker: the result of passing a
null pointer to pointer conversion specifier of printf family of functions
is implementation defined — for instance, on Windows zeros are printed,
whilst on Linux '(nil)' is printed.
The check assumes that a null pointer is only passed to a pointer
conversion specifier, otherwise it would be undefined behaviour. By making
this assumption we do not have to check the format string and match data
arguments to conversion specifiers.
Closes #43453
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D154838
Files:
clang/lib/StaticAnalyzer/Checkers/UnixAPIChecker.cpp
clang/test/Analysis/Inputs/expected-plists/unix-fns.c.plist
clang/test/Analysis/unix-fns.c
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