FYI: Userspace DTrace MFC to stable/8

[Zhihao Yuan]

On Wed, Mar 30, 2011 at 2:57 AM, Nikolay Denev <ndenev at gmail.com> wrote:
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> On Mar 1, 2011, at 12:10 PM, Kostik Belousov wrote:
>
>> On Tue, Mar 01, 2011 at 11:03:07AM +0200, Nikolay Denev wrote:
>>> On 1 Mar, 2011, at 01:33 , Robert Watson wrote:
>>>
>>>> Dear all:
>>>>
>>>> Just an FYI that I've gone ahead and merged userspace DTrace support to FreeBSD 8.x from 9.x.  While it appeared to pass build tests locally, boot and run, etc, this is a non-trivial merge, and it's possible I've messed up.  If so, apologies in advance, and I'll try to resolve any problems as quickly as I can!
>>>>
>>>> And of course, many thanks go to Rui Paulo, who did the port of userspace DTrace to FreeBSD 9.x with support from the FreeBSD Foundation!
>>>>
>>>> Thanks,
>>>>
>>>> Robert N M Watson
>>>> Computer Laboratory
>>>> University of Cambridge
>>>>
>>>
>>> That's great news! Many thanks to all that made this possible!
>>>
>>> I have a quick question though, now do I have to rebuild my world with "WITH_CTF" ?
>>> I'm asking because I did that by mistake some months ago on a RELENG_8 machine, and
>>> the world that was built had some problems, like gcc giving segfault 11 while compiling world or some ports.
>>>
>> It was a known issue that ctfconvert (I think it is ctfconvert) damages
>> statically linked binaries. Most likely, it was not fixed yet.
>
> I can confirm this is not fixed yet.
>
> I have two STABLE-8 machines which had their world rebuilt with WITH_CTF option,
> and now I'm unable to rebuild the world as both machines fail with Segmentation Fault: 11 on exactly the same place :
>
> mkdep -f .depend -a    -I/usr/obj/usr/src/tmp/legacy/usr/include -I/usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib -I/usr/src/gnu/usr.bin/gperf  /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/bool-array.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/gen-perf.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/hash-table.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/iterator.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/key-list.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/list-node.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/main.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/new.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/options.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/read-line.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/trace.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/vectors.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/src/version.cc /usr/src/gnu/usr.bin/gperf/../../../contrib/gperf/lib/hash.cc
> cc: Internal error: Segmentation fault: 11 (program cc1plus)
> Please submit a full bug report.
> See <URL:http://gcc.gnu.org/bugs.html> for instructions.
> mkdep: compile failed
> *** Error code 1
>
> Stop in /usr/src/gnu/usr.bin/gperf.
> *** Error code 1
>
> Stop in /usr/src.
> *** Error code 1
>
> Stop in /usr/src.
> *** Error code 1
>
> Stop in /usr/src.

I have met this problem before. WITH_CTF on world is not required to
use DTrace, and it seems that the gcc is broken. If can get a working
gcc4.2 in the base system, you are ucky. Or, you can download a base
system for the FreeBSD FTP site, and install it to a temp path, then
copy the gcc binary to /usr/bin.

>
> Regards,
> Nikolay
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-- 
Zhihao Yuan
The best way to predict the future is to invent it.