[lldb-dev] Emacs LLDB support & the GDB/MI Interface

Jan Kratochvil via lldb-dev lldb-dev at lists.llvm.org
Sat Jul 29 13:43:59 PDT 2017

On Sat, 29 Jul 2017 21:59:03 +0200, ylluminate via lldb-dev wrote:
> And one thread seems to indicate that if if we could "convince LLDB
> developers to provide

> a decent implementation of the GDB/MI protocol,

That is an oxymoron.

MI protocol was designed to minimize the amount of data transferred between
gdb/lldb and a front end.  But this communication isn't anything expensive as
the debugger always runs on the same host as the frontend anyway
(gdb/lldb<->gdbserver link is for remote debugging).  Unfortunately complexity
of the GDB/MI protocol from this misoptimization leads to many bugs on both
sides of the implementation, for GDB:
	101 bugs found.

The MI protocol in use does not conform to its spec as there is a bug-to-bug
compatibility instead such as:

There still also isn't any reasonable MI library to be used by a front end.

I find the LLDB API to be a better choice to be used by the frontend/emacs
(I have only little but great experience with the LLDB API).


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