Date: Fri, 21 Nov 2014 19:24:13 +0100 From: Jan Beich <jbeich@vfemail.net> To: Fabian Keil <freebsd-listen@fabiankeil.de> Cc: freebsd-ports@freebsd.org Subject: Re: Request for (i386) testing: american fuzzy lop Message-ID: <zjbk-1kfm-wny@vfemail.net> In-Reply-To: <1e452c69.4f66f2ab@fabiankeil.de> (Fabian Keil's message of "Fri, 21 Nov 2014 18:12:13 %2B0100") References: <3dc1c153.7b7b9177@fabiankeil.de> <546DF8A5.3060601@gmail.com> <3fb914c3.1002708a@fabiankeil.de> <a93l-6cj5-wny@vfemail.net> <8C0E4BEC-3B2B-4234-8BA8-60D53F5E0795@FreeBSD.org> <1e452c69.4f66f2ab@fabiankeil.de>
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Fabian Keil <freebsd-listen@fabiankeil.de> writes:
>> On 20 Nov 2014, at 17:51, Jan Beich <jbeich@vfemail.net> wrote:
>> ...
>> > while poudriere caught Clang i386 failing
>> >
>> > [*] Testing the CC wrapper and instrumentation output...
>> > AFL_QUIET=1 AFL_INST_RATIO=100 AFL_PATH=. ./afl-clang -O2 -pipe
>> > -fstack-protector -fno-strict-aliasing -Wall -D_FORTIFY_SOURCE=2
>> > -Wno-pointer-sign -DAFL_PATH=\"/prefix/afl-0.60b/lib/afl\"
>> > -DDOC_PATH=\"/prefix/afl-0.60b/share/doc/afl\" -DVERSION=\"0.60b\"
>> > -Wno-format test-instr.c -o test-instr
>> > /tmp/.afl-19244-1416499444.s: Assembler messages:
>> > /tmp/.afl-19244-1416499444.s:222: Error: unknown pseudo-op: `.cfi_sections'
>> > clang: error: assembler command failed with exit code 1 (use -v
>> > to see invocation)
>>
>> This has nothing do to with clang per se, it's GNU as outputting these messages.
>> Clang just runs it, if you disable its integrated assembler.
>> Is "afl-clang" a customized version?
>
> afl-clang is a thin wrapper around clang that makes sure afl-as
> (a wrapper around as) gets called.
In clang case, afl-as should feed the modified assembly back to the
compiler, not to GNU as. Try replacing |as| with |${CC} -c| except
adjusting positional parameters may slightly complicate it.
>
> Fabian
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