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Date:      Wed, 19 Apr 2017 14:13:06 -0500
From:      Justin Hibbits <jrh29@alumni.cwru.edu>
To:        rgrimes@freebsd.org
Cc:        John Baldwin <jhb@freebsd.org>, Slawa Olhovchenkov <slw@zxy.spb.ru>,  "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>,  "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, src-committers <src-committers@freebsd.org>
Subject:   Re: svn commit: r317094 - head/share/mk
Message-ID:  <CAHSQbTCF_JAkubQuBi=9nDVr79KjpLnbCMhjjSW1J9n1gDchcg@mail.gmail.com>
In-Reply-To: <201704191633.v3JGXWmu031427@pdx.rh.CN85.dnsmgr.net>
References:  <1709565.BYcnqjiFaR@ralph.baldwin.cx> <201704191633.v3JGXWmu031427@pdx.rh.CN85.dnsmgr.net>

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On Wed, Apr 19, 2017 at 11:33 AM, Rodney W. Grimes
<freebsd@pdx.rh.cn85.dnsmgr.net> wrote:
>> On Wednesday, April 19, 2017 01:28:37 AM Slawa Olhovchenkov wrote:
>> > On Tue, Apr 18, 2017 at 12:45:25PM -0700, John Baldwin wrote:
>> >
>> > > On Tuesday, April 18, 2017 07:30:13 PM Slawa Olhovchenkov wrote:
>> > > > On Tue, Apr 18, 2017 at 04:27:48PM +0000, John Baldwin wrote:
>> > > >
>> > > > > Author: jhb
>> > > > > Date: Tue Apr 18 16:27:48 2017
>> > > > > New Revision: 317094
>> > > > > URL: https://svnweb.freebsd.org/changeset/base/317094
>> > > > >
>> > > > > Log:
>> > > > >   Disable in-tree GDB by default on x86, mips, and powerpc.
>> > > > >
>> > > > >   GDB in ports contains all of the functionality as GDB in base
>> > > > >   (including kgdb) for these platforms along with additional
>> > > > >   functionality.  In-tree GDB remains enabled on ARM and sparc64.
>> > > > >   GDB in ports does not currently support kernel debugging on arm,
>> > > > >   and ports GDB for sparc64 has not been tested (though it does
>> > > > >   include sparc64 support).
>> > > > >
>> > > > >   Reviewed by:        bdrewery, emaste, imp
>> > > > >   Relnotes:   yes
>> > > > >   Sponsored by:       DARPA / AFRL
>> > > > >   Differential Revision:      https://reviews.freebsd.org/D10399
>> > > >
>> > > > Generating core.txt now complety broken?
>> > >
>> > > No.  crashinfo has supported gdb from ports for quite a while now.
>> > > If you 'pkg install gdb' crashinfo defaults to using the ports gdb over
>> > > the base one already.
>> >
>> > I am about clean install, w/o ports.
>>
>> Until we get some sort of klldb support that will not work.  However,
>> we already have platforms now where /usr/bin/gdb doesn't work for that.
>> riscv and aarch64 aren't supported in ancient gdb, and the MIPS
>> /usr/bin/gdb didn't really work for me in my testing.
>
> So we break what worked on a Tier1 Platform?  With my "user" hat on
> these are the exact kind of breakages that send me looking for another
> platform to run on.  We far to often just go oh you can do X y and Z
> to get around what we broke forgetting that the user 6 months from now
> when this hits a release isnt gona come ask, he may just go down the
> road to something else.
>
> Remove gdb WHEN klldb can replace it, not a day before.  Using "oh its
> broken on aarch64 and mips" is not a reason to break things on i386/amd64.
>

It's not removed, it's disabled by default now.  As the commit message
states, gdb in ports is much more feature filled than gdb in base

> Yes, I know we want to get gnu stuff out of the tree, but that needs
> to come AFTER a proper replacement is avaliable.
>
>>
>> > Also, how to generate core.txt after crash, reboot and install gdb
>> > from ports? (port instaled after crash)
>>
>> You can always run crashinfo by hand.
>
> /me starts to look for a new OS, this one is not very good at user support.

I'd say this more warrants a set of "blessed" packages to include on
install disks so we get this functionality without the extra step.

- Justin

>
>
> --
> Rod Grimes                                                 rgrimes@freebsd.org
>



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