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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug other/109163] New: SARIF (and other JSON) output files are non-deterministic Date: Thu, 16 Mar 2023 22:05:56 +0000 [thread overview] Message-ID: <bug-109163-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109163 Bug ID: 109163 Summary: SARIF (and other JSON) output files are non-deterministic Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: other Assignee: unassigned at gcc dot gnu.org Reporter: dmalcolm at gcc dot gnu.org Target Milestone: --- gcc/json.cc's json::object uses a hash_map for tracking the key/value pairs, and object::print iterates through them in arbitrary order, so every time we emit json files they can potentially vary, which makes it much harder to compare them from run to run (see e.g. PR 105959). It would probably be much more user-friendly to use an ordered_hash_map here to preserve insertion order and thus have deterministic output. I don't know if this would have a noticeable performance hit.
next reply other threads:[~2023-03-16 22:05 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-03-16 22:05 dmalcolm at gcc dot gnu.org [this message] 2023-03-16 22:10 ` [Bug other/109163] " dmalcolm at gcc dot gnu.org 2023-03-16 22:49 ` dmalcolm at gcc dot gnu.org 2023-03-17 20:57 ` dmalcolm at gcc dot gnu.org 2023-03-24 15:41 ` cvs-commit at gcc dot gnu.org 2023-03-31 13:03 ` dmalcolm at gcc dot gnu.org
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