Date: Thu, 21 Nov 2002 09:38:56 +0100 (CET) From: Harti Brandt <brandt@fokus.gmd.de> To: hackers@freebsd.org Subject: kernel basic block profiling Message-ID: <20021121093752.A36443-100000@beagle.fokus.gmd.de>
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Hi,
${subject} seems not to work on -current. First of all 'man kernbb' tells
me to compile at least one kernel file with '-a'. Well, gcc tells me that
it doesn't know anything about '-a'. After some grepping in the gcc
sources I came to the conclusion, that -fprofile-arcs is what it wants.
But even then 'kernbb' gives me nothing on the new kernel and gdb shows
bbhead to contain a 0. As far as I could figure out, the profile-arcs uses
a ctor section and I somehow doubt, that this works in the kernel case.
So, is ${subject} usable on current or is it just a stale feature?
Regards,
harti
--
harti brandt,
http://www.fokus.gmd.de/research/cc/cats/employees/hartmut.brandt/private
brandt@fokus.gmd.de, brandt@fokus.fhg.de
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