Re: ntpd wedged by libc?

[AGC <agcarver+netbsd%acarver.net@localhost>]

On 3/8/2012 09:40, Christos Zoulas wrote:
> On Mar 7,  9:41pm, agcarver+netbsd%acarver.net@localhost (AGC) wrote:
> -- Subject: Re: ntpd wedged by libc?
>
> | On 3/7/2012 18:58, Christos Zoulas wrote:
> |>  On Mar 7,  5:14pm, hart%ntp.org@localhost (Dave Hart) wrote:
> |
> |>  | You might be able to expose the bug with t_printf.c by changing it to
> |>  | generate and snprintf thousands of random floating point numbers.
> |>  |
> |>  That is what t_printf does... One million snprintf random numbers. Another
> |>  thing to do is to run top while it is running to see if it grows...
> |
> | No change in top while it's running.  It stays at 3228K/804K(resident)
> | the entire time.
>
> So something else must be leaking. You said that with the c99 snprintf
> it does not leak anymore? So that we've settled that this is snprintf/dtoa
> related?

Correct, using the hand-coded snprintf replacement inside ntpd's code 
(activated by a configure switch) ntpd does not leak memory that I can 
tell.  Other things that use libc appear to leak somewhat but I'm unsure 
what as the rate of leakage is slow on those processes.