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[Bug libc/16291] feature request: provide simpler ways to compute stack and tls boundaries
- From: "carlos at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 30 Jan 2014 19:21:31 +0000
- Subject: [Bug libc/16291] feature request: provide simpler ways to compute stack and tls boundaries
- Auto-submitted: auto-generated
- References: <bug-16291-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=16291
--- Comment #30 from Carlos O'Donell <carlos at redhat dot com> ---
(In reply to Sergey Matveev from comment #29)
> Callbacks are a natural fit for this. If glibc cooperates by calling our
> callbacks immediately after a DTLS block allocation and immediately before
> deallocation, and the callbacks record those events atomically, then we can
> freeze the thread at an arbitrary point and be sure that our record of what
> the DTLS looks like is up-to-date.
Instead of a callback could we use a systemtap probe with the right arguments?
We have precedent set for adding probes to libc and it would be easy to do with
the current infrastructure and low-overhead.
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