[lldb-dev] Support for Error Strings in remote protocol

[Jim Ingham via lldb-dev]

Because the gdb remote protocol docs explicitly state:

The error response returned for some packets includes a two character error number. That number is not well defined.

we don't put much stock in the actual error numbers.  

If you can determine that you are talking to lldb-server, then we could actually make these meaningful by keeping a common table.  But that would only work for lldbserver.

Jim


> On Jun 21, 2017, at 4:18 PM, Stephane Sezer via lldb-dev <lldb-dev at lists.llvm.org> wrote:
> 
> What's the specific use case that you're trying to support with error messages in the protocol? My initial thought on this is that it's not really the debug server's job to generate human-readable error messages and that the debugger is better suited to do the job.
> 
> Can this problem be solved by extending the current integer list used for errors?
> 
> On Wed, Jun 21, 2017 at 8:31 AM Ravitheja Addepally via lldb-dev <lldb-dev at lists.llvm.org> wrote:
> Hello all,
>        Currently the remote protocol in LLDB does not allow sending Error Strings in response to remote packets, it only allows for "ENN" format where N is a hex integer. In our current ongoing work, we would like to have support for Sending Error Strings from lldb-server. I would like to invite any opinions or suggestions in this matter ?
> 
> A very simple proposal would be to just attach an error string maybe as a Name:Value Pair ? like so ->
> 
> EXX;"Error String"
>  or
> EXX;M"Error String"
> 
> I guess removing EXX would make it incompatible with gdb-server. Also adding new packets to query errors might not be desired ?
> 
> 
> Regards,
> A Ravi Theja
> 
> 
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