[Bug analyzer/106299] New: RFE: analyzer handling of fdopen
dmalcolm at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Thu Jul 14 14:46:56 GMT 2022
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106299
Bug ID: 106299
Summary: RFE: analyzer handling of fdopen
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: analyzer
Assignee: dmalcolm at gcc dot gnu.org
Reporter: dmalcolm at gcc dot gnu.org
Blocks: 106003
Target Milestone: ---
Now that the analyzer supports checking both filedescriptor *and* FILE * usage,
we should probably add special-case handling of fdopen:
https://www.man7.org/linux/man-pages/man3/fdopen.3p.html
I'm not quite sure how to model the interaction between the two state machines;
perhaps a successful fdopen on a fd should transition the fd from an open state
to the "stop" state (i.e. stop tracking state on this fd), and transition the
FILE * from the start state to the open state.
See also bug 101550, which has an example of using fdopen.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106003
[Bug 106003] RFE: -fanalyzer could complain about misuse of file-descriptors
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