[lldb-dev] Remote Debugging on Linux

[Abhishek Aggarwal]

Hi Vince

Do you mean that you are cross-compiling LLDB or are you cross-compiling
only LLDB-server ?
Can you share with me the procedure to do it? I couldn't find any
documentation for it.

On Fri, Feb 27, 2015 at 5:06 AM, Vince Harron <vharron at google.com> wrote:

> We are focusing on cross compiling the 32bit LLDB server from x86_64.  We
> will eventually need to compile the 32bit host binaries on Windows but we
> aren't focused on 32 but Mac/Linux hosts.  Please feel free to get this
> working.
>
> Vince
>  On Feb 25, 2015 9:00 AM, "Abhishek Aggarwal" <abhiinnitald at gmail.com>
> wrote:
>
>> Hi All
>>
>> Thanks a lot for all the inputs.
>>
>> @Greg: I could make it work using the lldb-platform. I had checked out
>> source code of LLDB on Feb 16 and had built (Debug+Asserts) it on Fedora 20
>> system (x86_64). I will like to make few comments which are inlined.
>>
>> @Vince: Are you building LLDB for x86_32 Linux ? I tried to build it
>> (Debug build) for such a system and it fails during linking process because
>> of lack of memory.
>> In order to bring up x86_32 support, are you following a different
>> approach ? I read the thread initiated by you "Transitioning to Linux local
>> debugging via lldb-gdbserver" . Are you using this approach?
>>
>>
>> On Tue, Feb 24, 2015 at 11:34 PM, Vince Harron <vharron at google.com>
>> wrote:
>>
>>> It's only really tested on x86_64->x86_64.  We are bringing up x86_32
>>> and arm32/64 now-ish, MIPS soon to follow.
>>>
>>> Please let us know if you hit any problems!
>>>
>>>
>>> On Tue, Feb 24, 2015 at 3:52 PM, Greg Clayton <gclayton at apple.com>
>>> wrote:
>>>
>>>> The first way to do this is to use the lldb-platform to allow you to
>>>> view and launch processes on the remote host.
>>>>
>>>> On the remote machine launch lldb-server:
>>>>
>>>
>>
>>> remote.foo.com% lldb-server platform --listen=2000 --stay-alive
>>>>
>>>>
>> I had to replace "lldb-server platform" by "lldb-platform" because right
>> now, building lldb doesn't generate any binary with name lldb-server.
>>
>>
>>> Then on your host machine:
>>>>
>>>> host.bar.com% lldb
>>>> (lldb) platform select remote-linux
>>>> (lldb) platform connect connect://remote.foo.com:2000
>>>>
>>>> Now you have a live connection to a platform server on the remote host
>>>> so you can list existing processes:
>>>>
>>>> (lldb) platform process list
>>>> (lldb) platform process attach --pid ...
>>>>
>>>> Or you can launch:
>>>>
>>>> (lldb) file /path/to/binary
>>>> (lldb) process launch -- arg1 arg2
>>>>
>>>> The platform will launch a lldb-server to debug your programs on the
>>>> other system.
>>>>
>>>>
>> This thing worked pretty well.
>>
>>
>>>
>>>>
>>>> The other is to just directly debug a process. In this case we don't go
>>>> through the platform, we just start lldb-server on
>>>>
>>>> remote.foo.com% lldb-server gdbserver host.bar.com:2000 -- arg1 arg2
>>>>
>>>>
>> Again , I replaced "lldb-server gdbserver" by lldb-gdbserver.
>>
>>
>>> Then attach to it:
>>>>
>>>> host.bar.com% lldb
>>>> (lldb) file /path/to/binary
>>>> (lldb) process connect connect://remote.foo.com:2000
>>>>
>>>>
>> While running process connect command, I got the following error
>>        "error: remote connections are not supported"
>>
>>
>>
>>> Now you will be stopped at the program entry point and ready to debug a
>>>> single process.
>>>>
>>>> All of this is of course using the top of tree SVN sources. It will
>>>> change a bit if you are using older sources.
>>>>
>>>
>> The above error might be because my source code is old. But I am not sure
>> given that the source code is 9 days old.
>>
>>
>>>
>>>> Greg
>>>>
>>>>
>>>> > On Feb 24, 2015, at 6:09 AM, Abhishek Aggarwal <
>>>> abhiinnitald at gmail.com> wrote:
>>>> >
>>>> > Hi All
>>>> >
>>>> > I am new to LLDB. I want to remotely debug some applications. Both
>>>> the host and target OS is Linux.
>>>> >
>>>> > I went through few discussions in this list regarding remote
>>>> debugging but I am still unclear about how to do it.
>>>> > I could figure out from the discussions that there are 2 ways to do
>>>> remote debugging: lldb-platform and lldb-gdbserver
>>>> >
>>>> > I don't know which one of them is fully functional for Linux. I would
>>>> highly appreciate some comments here.
>>>> >
>>>> >
>>>> > Thanks
>>>> > Abhiinnit
>>>> > _______________________________________________
>>>> > lldb-dev mailing list
>>>> > lldb-dev at cs.uiuc.edu
>>>> > http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>>>>
>>>>
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>>>>
>>>
>>>
>>>
>>> --
>>>
>>> Vince Harron | Technical Lead Manager | vharron at google.com |
>>> 858-442-0868
>>>
>>
>> Thanks
>>
>>
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