[PATCH] MCJIT MachO debugging support

[Keno Fischer]

I implemented the LLDB side of this interface, but I don't know GDB at all,
so we'd have to talk to those folks.


On Tue, Jul 15, 2014 at 2:57 PM, Lang Hames <lhames at gmail.com> wrote:

> Hi Keno,
>
> ELF is broken too, and I'll be looking at fixing that in the future. The
> impact on MachO is higher as MachO relies on the section address info for
> relocation, which ELF does not.
>
> I would love to fix this by changing the debugger interface. I was
> planning to send an email out about that this afternoon. Do you work on the
> GDB side of this interface?
>
> Cheers,
> Lang.
>
>
> On Tue, Jul 15, 2014 at 1:40 PM, Keno Fischer <
> kfischer at college.harvard.edu> wrote:
>
>> The ELF backend does the exact same thing here. Should we rip that out
>> too? Otherwise, could we maybe selectively enable it for the MCJIT case? I
>> guess the real problem here is the debugger interface, which requires this
>> kind of thing. Might be good to sit down very soon and think about if
>> there's a better interface to the debugger we should expose. It would be
>> good to do that sooner rather than later.
>>
>>
>> On Tue, Jul 15, 2014 at 12:54 PM, Lang Hames <lhames at gmail.com> wrote:
>>
>>> Hi Keno,
>>>
>>> I've reverted this in r213086 and filed
>>> http://llvm.org/bugs/show_bug.cgi?id=20309 to track re-enabling support.
>>>
>>> Cheers,
>>> Lang.
>>>
>>>
>>>
>>> On Tue, Jul 15, 2014 at 11:30 AM, Lang Hames <lhames at gmail.com> wrote:
>>>
>>>> Hi Keno,
>>>>
>>>> Sorry - I'm going to have to back this out: It's breaking llvm-rtdyld
>>>> due to the read-only MemoryBuffer issue. It also wreaks havoc with
>>>> RuntimeDyldMachO in general, since we can no longer code to the
>>>> MachOObjectFile API (section address references are common, and now these
>>>> all need to go via the ObjectImage).
>>>>
>>>> Once the RuntimeDyldMachO cleanup is in (hopefully today) I'll return
>>>> to this - I think I can adapt your patch to build a solution that will do
>>>> the right thing here.
>>>>
>>>> Cheers,
>>>> Lang.
>>>>
>>>>
>>>>
>>>> On Tue, Jun 24, 2014 at 5:29 PM, Lang Hames <lhames at gmail.com> wrote:
>>>>
>>>>> Committed in r211652. Thanks Keno!
>>>>>
>>>>> http://reviews.llvm.org/D4005
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>
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