public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/97817] -Wformat-truncation=2 elicits invalid warning Date: Fri, 13 Nov 2020 22:36:26 +0000 [thread overview] Message-ID: <bug-97817-4-rA5AJAtEHW@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-97817-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97817 Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |msebor at gcc dot gnu.org Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> --- Level 2 of the warning is documented to warn also about calls to bounded functions whose return value is used and that might result in truncation given an argument of sufficient length or magnitude. The level is meant to help write code with the least likelihood of truncation given unknown arguments. In the test case, the output of the function will be truncated unless buflen is at least 16. It will also be truncated if buflen is 16 and errnum is either negative or bigger than 9. The note printed after the warning indicates the minimum size of output (i.e., 16) and the maximum (26) beyond which truncation is impossible.
next prev parent reply other threads:[~2020-11-13 22:36 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-13 18:16 [Bug c/97817] New: " jim at meyering dot net 2020-11-13 18:24 ` [Bug c/97817] " jim at meyering dot net 2020-11-13 18:37 ` schwab@linux-m68k.org 2020-11-13 22:36 ` msebor at gcc dot gnu.org [this message] 2020-11-13 23:03 ` jim at meyering dot net 2020-11-18 23:16 ` msebor at gcc dot gnu.org
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-97817-4-rA5AJAtEHW@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).