Re: [PATCH 1/4] New gdb arch hook: return_with_first_hidden_param_p

Yao Qi
2012-05-15T06:51:25Z

On 05/15/2012 01:14 AM, Joel Brobecker wrote:
>>> > > Can we use the fact that functions that have their first parameter
>>> > > be a nameless, artificial, paramter whose type is a pointer to
>>> > > the return type? Or would this heuristics trigger in other situations?
>> >
>> > Yeah, I thought of that heuristics, but it still can't differentiate
>> > passing 3 or 4 parameters.
> So, you are saying that we have functions who have an extra hidden
> parameter used for something other than the function's return value?
>

No, the extra hidden parameter's type is the reference of the function's
return type. My point is if we only examine debug info, we don't know
whether hidden parameter is passed, because the debug info is the same
regardless of hidden parameter is passed or not.

--
Yao (é½å°§)