[cfe-dev] How to debug a clang compiled executable.
clattner at apple.com
Thu Jul 29 09:20:40 PDT 2010
On Jul 29, 2010, at 7:12 AM, Sean McBride wrote:
> On Wed, 28 Jul 2010 17:04:47 -0700, Bill Wendling said:
>>> strncat_chk is used because you defined _FORTIFY_SOURCE. IIRC, it helps
>>> check for overruns using C string functions. I believe in 10.5 the
>>> _FORTIFY_SOURCE version of strncat was screwy, ah, here you go:
>>> I think it's fixed on 10.6.
>>> Try again without -D_FORTIFY_SOURCE=2, and maybe remove -fstack-
>>> protector-all too.
>> Ewww...don't remove the "-fstack-protector-all". It's your friend. :) If
> It is one's friend, in general.
>> it's aborting because of the stack protector, then you have a definite
>> buffer overrun.
> That's fallacious. It could be aborting because of a bug with -fstack-
> protector-all, which is exactly what I'm saying. See <rdar://6105964>
> if you have access.
FWIW That bug got fixed in 2008 and the fix shipped with SnowLeopard.
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