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[Bug dynamic-link/14370] ld.so crashes on mismatched TLS/non-TLS symbols
- From: "hjl.tools at gmail dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Wed, 05 Sep 2012 15:29:56 +0000
- Subject: [Bug dynamic-link/14370] ld.so crashes on mismatched TLS/non-TLS symbols
- Auto-submitted: auto-generated
- References: <bug-14370-131@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=14370
--- Comment #23 from H.J. Lu <hjl.tools at gmail dot com> 2012-09-05 15:29:56 UTC ---
(In reply to comment #22)
> (In reply to comment #20)
>
> > The performance impact is too small to be visible unless most
> > of time is spent in _dl_symbol_lookup_x.
>
> For a large application with 1000+ shared libraries (which is how we run unit
> tests here), time-to-main often *is* dominated by _dl_symbol_lookup_x.
Do you have a setup to simulate this with the newly built glibc
without installing it?
> "make && make check" are about the worst possible way to measure the impact --
> they invoke small programs with (relatively) very few dynamic symbol
> resolutions.
Understand. But it is the easiest way to test the newly built glibc.
> Measuring startup time for Firefox or OpenOffice would (I expect) be much more
> meaningful.
This isn't practical for me.
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