[lldb-dev] Serial port support in LLDB

[Pavel Labath via lldb-dev]

On 08/10/2021 11:06, Pavel Labath via lldb-dev wrote:
> On 06/10/2021 14:59, Michał Górny wrote:
>> On Wed, 2021-10-06 at 14:32 +0200, Pavel Labath wrote:
>>> Let me try to make a counterproposal.
>>>
>>> Since the serial parameters are a property of a specific connection, and
>>> one could theoretically have be debugging multiple processes with
>>> different connection parameters, having a (global) setting for them does
>>> not seem ideal. And since lldb already has a history of using made up
>>> urls (unix-connect://, tcp://), I am wondering if we couldn't/shouldn't
>>> invent a new url scheme for this. So like instead of file:///dev/ttyS0,
>>> one would use a new scheme (say serial:// to connect), and we would
>>> somehow encode the connection parameters into the url. For example, this
>>> could look something like
>>>     serial://[PARODD,STOP1,B19200]/dev/ttyS0
>>> This connection string could be passed to both lldb and lldb-server
>>> without any new arguments. Implementation-wise this url could be
>>> detected at a fairly high level, and would cause us to instantiate a new
>>> class which would handle the serial connection.
>>
>> I don't have a strong opinion either way.  I suppose this would be
>> a little easier to implement, though I'd prefer using something more
>> classically URL-ish, i.e.:
>>
>>    serial:///dev/ttyS0?baud=115200&parity=odd...
>>
>> or:
>>
>>    serial:///dev/ttyS0,baud=115200,parity=odd...
>>
>> I suppose it would prevent weird paths but I don't think we need to
>> account for weird paths for ttys (and if we did, we should probably
>> urlencode them anyway).
>>
> 
> The the full-url version (with ? and &). I'm sure you've noticed this 
> already, but for the sake of others, let me just mention that we already 
> have a TODO to support a syntax like this.
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(I meant to say I like the full url version)