RFR: 8144885: agent/src/os/linux/libproc.h needs to support Linux/SPARC builds

[Mikael Vidstedt]

Got it, thanks.

I'm pushing the change now, thanks for the help reviewing and verifying it!

Cheers,
Mikael

On 2015-12-10 18:48, Alexander Smundak wrote:
> I just replaced -MMD option with -MD in the compilation commands, and
> verified that all the generated .d files (dependencies for 'make')
> contain asm/ptrace.h as dependency. Admittedly, it might be that the
> asm/ptrace.h is included, but later than where your
> patch includes it.
>
> On Thu, Dec 10, 2015 at 3:05 PM, Mikael Vidstedt
> <mikael.vidstedt at oracle.com> wrote:
>> Only because I'm curios - which include chain makes that happen?
>>
>> Cheers,
>> Mikael
>>
>>
>> On 2015-12-10 13:44, Alexander Smundak wrote:
>>> It works for the little-endian PPC64 (actually, asm/ptrace.h will be
>>> included anyway, regardless of the change).
>>>
>>> On Thu, Dec 10, 2015 at 9:34 AM, Mikael Vidstedt
>>> <mikael.vidstedt at oracle.com> wrote:
>>>> It would surprise me (but probably shouldn't) if this breaks on ppc64,
>>>> but -
>>>> hey, ppc64 guys, this work for you? :)
>>>>
>>>> http://cr.openjdk.java.net/~mikael/webrevs/8144885/webrev.01/webrev
>>>>
>>>> Cheers,
>>>> Mikael
>>>>
>>>> On 2015-12-09 21:09, David Holmes wrote:
>>>>> On 10/12/2015 8:28 AM, Dmitry Samersoff wrote:
>>>>>> Mikael,
>>>>>>
>>>>>> Looks good for me.
>>>>>>
>>>>>> Hope it doesn't brake ppc64 build.
>>>>>
>>>>> This needs to be checked with ppc64 folk first I think - else modified
>>>>> to
>>>>> not affect ppc64.
>>>>>
>>>>> Thanks,
>>>>> David
>>>>>
>>>>>> -Dmitry
>>>>>>
>>>>>> On 2015-12-10 00:49, Mikael Vidstedt wrote:
>>>>>>>
>>>>>>> Right, I think that's the way to go. I suggest the following change:
>>>>>>>
>>>>>>> http://cr.openjdk.java.net/~mikael/webrevs/8144885/webrev.01/webrev
>>>>>>>
>>>>>>> Cheers,
>>>>>>> Mikael
>>>>>>>
>>>>>>> On 2015-12-09 13:01, Dmitry Samersoff wrote:
>>>>>>>> Mikael,
>>>>>>>>
>>>>>>>>> It simply doesn't export the type we need on SPARC (struct pt_regs
>>>>>>>>> or
>>>>>>>>> whatever it's called, I don't have the code in front of me right
>>>>>>>>> now). I don't know why, it simply doesn't :)
>>>>>>>> For this case, please include <asm/ptrace.h> rest of code
>>>>>>>> used to it.
>>>>>>>>
>>>>>>>> -Dmitry
>>>>>>>>
>>>>>>>>
>>>>>>>> On 2015-12-09 08:58, Mikael Vidstedt wrote:
>>>>>>>>>> On Dec 8, 2015, at 20:08, David Holmes <david.holmes at oracle.com>
>>>>>>>>>> wrote:
>>>>>>>>>>
>>>>>>>>>>> On 9/12/2015 4:05 AM, Mikael Vidstedt wrote:
>>>>>>>>>>>
>>>>>>>>>>> The problem is that this needs to be backporting to jdk8u where
>>>>>>>>>>> there is no devkit, and more importantly, even if there were I
>>>>>>>>>>> believe we would see the same issue: the types needed are not
>>>>>>>>>>> made available by including sys/ptrace.h on this platform. I
>>>>>>>>>>> believe we can choose between linux/ptrace.h or asm/ptrace.h. The
>>>>>>>>>>> former feels slightly better.
>>>>>>>>>> Sorry I'm not convinced. What is the issue with using sys/ptrace.h
>>>>>>>>>> (which should exist on your build platforms and your devkit)?
>>>>>>>>> It simply doesn't export the type we need on SPARC (struct pt_regs
>>>>>>>>> or
>>>>>>>>> whatever it's called, I don't have the code in front of me right
>>>>>>>>> now). I don't know why, it simply doesn't :)
>>>>>>>>>
>>>>>>>>> Cheers, Mikael
>>>>>>>>>
>>>>>>>>>> Thanks, David
>>>>>>>>>>
>>>>>>>>>>> Cheers, Mikael
>>>>>>>>>>>
>>>>>>>>>>>> On Dec 8, 2015, at 03:15, Dmitry Samersoff
>>>>>>>>>>>> <dmitry.samersoff at oracle.com> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>> Jerry,
>>>>>>>>>>>>
>>>>>>>>>>>>> In which case the devkit needs fixing I think, not the code.
>>>>>>>>>>>> I'm second to David.
>>>>>>>>>>>>
>>>>>>>>>>>> It's better to not include linux/* headers explicitly.
>>>>>>>>>>>>
>>>>>>>>>>>> -Dmitry
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>>> On 2015-12-08 08:23, David Holmes wrote: On 8/12/2015 2:59
>>>>>>>>>>>>>> PM, Gerald Thornbrugh wrote: Hi David,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Yes, I believe this is a devkit issue.  Mikael and I have
>>>>>>>>>>>>>> been working to get JDK9 building in JPRT with the lab
>>>>>>>>>>>>>> Linux/SPARC machines that use a devkit and this change was
>>>>>>>>>>>>>> needed. I will update the bug detailing this as a devkit
>>>>>>>>>>>>>> issue.
>>>>>>>>>>>>> In which case the devkit needs fixing I think, not the code.
>>>>>>>>>>>>>
>>>>>>>>>>>>> Cheers, David
>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks!
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Jerry
>>>>>>>>>>>>>>> Hi Jerry,
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> On 8/12/2015 8:58 AM, Gerald Thornbrugh wrote: Hi
>>>>>>>>>>>>>>>> Everyone,
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Please review this small change which fixes a JDK9
>>>>>>>>>>>>>>>> Linux/SPARC build problem in
>>>>>>>>>>>>>>>> "hotspot/agent/src/os/linux/libproc.h” so the correct
>>>>>>>>>>>>>>>> “ptrace.h” include file will be used during the build
>>>>>>>>>>>>>>>> process.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8144885
>>>>>>>>>>>>>>>> <https://bugs.openjdk.java.net/browse/JDK-8144885>
>>>>>>>>>>>>>>>> Webrev:
>>>>>>>>>>>>>>>> http://cr.openjdk.java.net/~gthornbr/8144885/webrev/
>>>>>>>>>>>>>>>> <http://cr.openjdk.java.net/~gthornbr/8144885/webrev/>
>>>>>>>>>>>>>>> As far as I can see both versions of ptrace.h exist on
>>>>>>>>>>>>>>> linux x86 and linux sparc distributions, so it is not at
>>>>>>>>>>>>>>> all clear why this change is needed. Is it perhaps an
>>>>>>>>>>>>>>> issue with a devkit?
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Thanks, David
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Jerry
>>>>>>>>>>>>
>>>>>>>>>>>> -- Dmitry Samersoff Oracle Java development team, Saint
>>>>>>>>>>>> Petersburg, Russia * I would love to change the world, but they
>>>>>>>>>>>> won't give me the source code.
>>>>>>>>