[PATCH v3 4/5] gdb: generalize commit_resume, avoid commit-resuming when threads have pending statuses

[Simon Marchi]

On 2021-01-11 3:28 p.m., Simon Marchi wrote:
> On 2021-01-09 3:34 p.m., Pedro Alves wrote:
>>> @@ -86,6 +77,35 @@ class process_stratum_target : public target_ops
>>>  
>>>    /* The connection number.  Visible in "info connections".  */
>>>    int connection_number = 0;
>>> +
>>> +  /* Whether resumed threads must be committed to the target.
>>> +
>>> +     When true, resumed threads must be committed to the execution target.
>>> +
>>> +     When false, the process stratum target may leave resumed threads stopped
>>> +     when it's convenient or efficient to do so.  When the core requires resumed
>>> +     threads to be committed again, this is set back to true and calls the
>>> +     `commit_resumed` method to allow the target to do so.
>>> +
>>> +     To simplify the implementation of process stratum targets, the following
>>> +     methods are guaranteed to be called with COMMIT_RESUMED_STATE set to
>>> +     false:
>>> +
>>> +       - resume
>>> +       - stop
>>> +       - wait
>>
>> Should we mention this in the documentation of each of these methods?
> 
> Yeah that would be nice.  Would you mention it in both places
> or just in those methods' documentation?

I just remembered why I put it there and not on the target methods.
Since commit-resumed is a concept specific to process targets, I don't
think that information belongs in struct target_ops, since it doesn't
make sense for other target_ops implementers.

Simon