[lldb-dev] [RFC] [PATCH] Self Debugging on Linux

[Russell Harmon]

Hey Todd,

Did you get a chance to look at the patches?

Thanks,
Russ

On Mon Sep 29 2014 at 9:12:53 AM Todd Fiala <tfiala at google.com> wrote:

> Hey Russell,
>
> I'll have a look at those patches sometime over the next couple days and
> get back here.
>
> Thanks for sharing them!
>
> Sincerely,
> Todd Fiala
>
> On Fri, Sep 26, 2014 at 9:56 AM, <eatnumber1 at google.com> wrote:
>
>> Hey everyone,
>>
>> I've got some preliminary but functioning work in place in order to
>> support
>> self-debugging. Immediately forthcoming is two patches, summarized below,
>> which
>> implement basic support for self-debugging on Linux. I've leveraged the
>> ProcessMonitor architecture on Linux in order to do this, so the first
>> patch is
>> a refactor of ProcessMonitor to allow me to create a different
>> implementation of
>> it. The second patch actually fills in the self-debugging implementation.
>>
>> [PATCH 1/2] Refactor ProcessMonitor into an abstract base class.
>> [PATCH 2/2] Support debugging yourself on Linux.
>>
>> There's still some issues:
>>  * I needed to disable JITLoaderGDB [1] in order to prevent lldb from
>> attempting
>>    to set a breakpoint at attach. I'm also not clear on what JITLoaderGDB
>> does
>>    even after perusing the code, so I'm not sure if disabling it is the
>> right
>>    thing to do.
>>  * I needed to disable LLDB copying it's stdin to it's inferior's [1] as
>> it
>>    would result in multiple threads reading from stdin - making it
>> impossible to
>>    use the prompt. This behavior makes sense to me if the debugee is
>> launched
>>    from LLDB, but I'm not clear on why LLDB attempts to do it when you've
>>    attached to your debugee.
>>  * "thread list" returns nothing. I think there's a larger problem here.
>> Needs
>>    investigation.
>>
>> Thanks,
>> Russ Harmon
>>
>> [1]: https://gist.github.com/anonymous/188533a776226257206f
>>
> _______________________________________________
>> lldb-dev mailing list
>> lldb-dev at cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>>
>
>
>
> --
> Todd Fiala | Software Engineer | tfiala at google.com | 650-943-3180
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/lldb-dev/attachments/20141008/731996e2/attachment.html>