From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: possible snprintf() regression in 3.3.2
Date: Mon, 22 Nov 2021 11:34:12 +0100 [thread overview]
Message-ID: <YZtyJDXdrMzVR2lJ@calimero.vinschen.de> (raw)
In-Reply-To: <20211121001613.GH10332@venus.tony.develop-help.com>
On Nov 21 11:16, Tony Cook wrote:
> On Thu, Nov 18, 2021 at 09:08:40PM +0000, Sam Edge via Cygwin wrote:
> > I use newlib on embedded with threading libs that have predetermined
> > fixed thread stack sizes. While we tend to have more RAM than in former
> > times we also have multiple thread stacks. Use of alloca() or variable
> > length automatic arrays makes me wince especially in code I might not be
> > able to avoid calling which is often the case with XXXprintf() in
> > third-party libraries' debug output. I'd usually rather take the
> > performance hit from using heap instead of having to make all my stacks
> > bigger.
>
> A simple option would be to use an small auto fixed buffer for most
> conversions, but use malloc() for %f formats for numbers greater in
> magnitude than some limit, though it would also need to be adjusted
> for the precision (ndigits here), since they take extra space.
>
> This would avoid using the optional-to-implement VLA feature too.
Good idea. I guess I create a simple fix doing just that.
Thanks,
Corinna
next prev parent reply other threads:[~2021-11-22 10:34 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-17 0:37 Tony Cook
2021-11-17 9:21 ` Takashi Yano
2021-11-17 12:27 ` Corinna Vinschen
2021-11-18 0:06 ` Tony Cook
2021-11-18 11:35 ` Takashi Yano
2021-11-18 13:19 ` Corinna Vinschen
2021-11-18 14:11 ` Noel Grandin
2021-11-18 14:27 ` Corinna Vinschen
2021-11-18 21:08 ` Sam Edge
2021-11-21 0:16 ` Tony Cook
2021-11-22 10:34 ` Corinna Vinschen [this message]
2021-11-22 13:04 ` Corinna Vinschen
2021-11-22 23:23 ` Tony Cook
2021-11-23 8:34 ` Takashi Yano
2021-11-23 9:48 ` Corinna Vinschen
2021-11-24 3:40 ` Takashi Yano
2021-11-24 8:48 ` Corinna Vinschen
2021-11-24 8:52 ` Takashi Yano
2021-11-24 9:14 ` Takashi Yano
2021-11-24 9:28 ` Corinna Vinschen
2021-11-24 12:29 ` Lemke, Michael SF/HZA-ZI2E
2021-11-25 12:02 ` Takashi Yano
2021-11-25 12:45 ` Corinna Vinschen
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