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From: "priour.be at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug analyzer/109439] New: RFE: Spurious -Wanalyzer-use-of-uninitialized-value tagging along -Wanalyzer-out-of-bounds Date: Thu, 06 Apr 2023 17:08:02 +0000 [thread overview] Message-ID: <bug-109439-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109439 Bug ID: 109439 Summary: RFE: Spurious -Wanalyzer-use-of-uninitialized-value tagging along -Wanalyzer-out-of-bounds Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: analyzer Assignee: dmalcolm at gcc dot gnu.org Reporter: priour.be at gmail dot com CC: priour.be at gmail dot com Target Milestone: --- Build: 13.0.1 20230328 (experimental) For every -Wanalyzer-out-of-bounds, a corresponding -Wanalyzer-use-of-initialized-value seemingly tags along. As most likely fixing the former would also fix the latter, it would make sense to only have a OOB diagnosed. Tested on trunk. int would_like_only_oob () { int arr[] = {1,2,3,4,5,6,7}; int y1 = arr[9]; // 2 warnings instead of only OOB warning are emitted here return y1; } In the mail list, David suggested that "Maybe we could fix this by having region_model::check_region_bounds return a bool that signifies if the access is valid, and propagating that value up through callers so that we can return a non- poisoned_svalue at the point where we'd normally return an "uninitialized" poisoned_svalue. Alternatively, we could simply terminate any analysis path in which an OOB access is detected (by implementing the pending_diagnostic::terminate_path_p virtual function for class out_of_bounds)."
next reply other threads:[~2023-04-06 17:08 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-04-06 17:08 priour.be at gmail dot com [this message] 2023-05-20 22:42 ` [Bug analyzer/109439] " vultkayn at gcc dot gnu.org 2023-06-08 9:50 ` cvs-commit at gcc dot gnu.org 2023-07-07 11:05 ` vultkayn at gcc dot gnu.org
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