Date: Mon, 31 Mar 2014 10:15:17 -0400 From: Mark Johnston <markj@freebsd.org> To: Dimitry Andric <dim@freebsd.org> Cc: freebsd-stable stable <freebsd-stable@freebsd.org>, Kai Wang <kaiw@freebsd.org> Subject: Re: HEADS UP: merged llvm/clang 3.4 Message-ID: <CAMw1wOxLPoyMO61uASDkikz=t5fzvS%2BauaFJgjZOuE09NT0bag@mail.gmail.com> In-Reply-To: <16CDBEB1-3900-4EE4-B643-C95BA58F4C4E@FreeBSD.org> References: <0E7E81A1-54E9-4920-A360-005A1C0C4D47@FreeBSD.org> <20140327002240.GC49672@raichu> <C0345D09-CC49-49F6-ACCA-B85C7882AAC3@FreeBSD.org> <CAMw1wOxgwC47sj_rDvzys7_xb8%2BYRz=kdMq9dj=Z=WchypmU5Q@mail.gmail.com> <20140328225902.GA7417@soulhacker> <16CDBEB1-3900-4EE4-B643-C95BA58F4C4E@FreeBSD.org>
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On Sat, Mar 29, 2014 at 1:25 PM, Dimitry Andric <dim@freebsd.org> wrote:
> On 28 Mar 2014, at 23:59, Kai Wang <kaiw@FreeBSD.org> wrote:
>> On Thu, Mar 27, 2014 at 11:03:11PM -0400, Mark Johnston wrote:
>>> On Thu, Mar 27, 2014 at 6:32 PM, Dimitry Andric <dim@freebsd.org> wrote:
>>>> On 27 Mar 2014, at 01:22, Mark Johnston <markj@freebsd.org> wrote:
> ...
>>>>> DTrace seems to no longer work properly on stable/10; I get errors like
>>>>> the following
>>>>>
>>>>> dtrace: invalid probe specifier pid$target::malloc:entry{ }:
>>>>> "/usr/lib/dtrace/io.d", line 49: cannot find type: struct devstat*: Type
>>>>> information is in parent and unavailable
> ...
>> I extracted a patch for ctfconvert from -head and adapted it to the
>> old libdwarf in stable/10. The patch fixes some type parsing bugs for
>> ctfconvert with Clang 3.4 objects, which might be related to your
>> DTrace issue, but I'm not sure...
>>
>> The patch is here:
>>
>> http://people.freebsd.org/~kaiw/ctfconvert-stable10.patch
>>
>> (It should apply to stable/10. Both world and kernel needs recompile)
>
> Thanks! I have merged this to stable/10, and (slightly modified) to
> stable/9, in r263915. I have verified that on both branches, simple
> dtrace commands like:
>
> dtrace -n 'syscall:::entry { @num[execname] = count(); }'
>
> work as expected. I assume DTrace will now work OK, but any other more
> extensive verification by somebody familiar with DTrace is welcome.
Thank you both! I'll do some testing in the next couple of days and
report back if I run into any new problems.
>
> Note that you *must* first build and install at least the CTF tools,
> before building a kernel, otherwise the broken versions from /usr/bin
> will still be used. This is actually a problem in our kernel build
> tools stage, but a solution for that is still missing.
>
> -Dimitry
>
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