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[Bug dynamic-link/14370] ld.so crashes on mismatched TLS/non-TLS symbols
- From: "carlos_odonell at mentor dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Tue, 04 Sep 2012 22:03:15 +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 #18 from Carlos O'Donell <carlos_odonell at mentor dot com> 2012-09-04 22:03:15 UTC ---
(In reply to comment #17)
> Here are before and after timings of "make all" and "make check".
H.J., Thanks for working on this...
This looks like your patch *improved* performance, of which I'm skeptical
because it adds more instructions into the _dl_symbol_lookup_x hot path.
Are the build times from a cold reboot or after a "flush" to ensure the
previous build didn't change the numbers?
I don't like it that ld.so crashes, but I'm not sold that this is the best
solution, but it certainly makes the dynamic linker more rugged and perhaps
avoids what could possibly be used as an attack vector for a security breach.
Please post this to libc-alpha for wide review.
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