On 7/19/2010 9:29 AM, Igor Stasenko wrote:
> No, debugger, actually doing a primitive call,
> but in order to intercept a primitive failure and 'step into' method,
> it does the trick
> with replacing the subject method with temporary method (which will
> call the same primitive with same arguments&  recevier).
> Then, if primitive runs ok, it simply behaves as a 'step over',
> and if primitive fails, then debugger itercepts it and creates a
> context for subject method, which should handle primitive failure.

Correct. Stepping over FFI calls will only fail if the FFI call actually 
fails. So whatever the problem it's somewhere in your FFI call.

Cheers,
   - Andreas

> On 19 July 2010 19:22, Schwab,Wilhelm K<bschwab at anest.ufl.edu>  wrote:
>> So the external call does not happen and the fall-back code executes.  That explains it.  It might be nice if FFI calls could be made to happen, or at least to have a more informative error message, such as "Primitive not executed by the debugger" rather than "Unable to find function address."
>>
>> Bill
>>
>>
>>
>>
>> ________________________________________
>> From: pharo-project-bounces at lists.gforge.inria.fr [pharo-project-bounces at lists.gforge.inria.fr] On Behalf Of Levente Uzonyi [leves at elte.hu]
>> Sent: Monday, July 19, 2010 12:20 PM
>> To: Pharo-project at lists.gforge.inria.fr
>> Subject: Re: [Pharo-project] Debug-it and external calls
>>
>> On Mon, 19 Jul 2010, Schwab,Wilhelm K wrote:
>>
>>> I often (not always??) find that using the Debug-it command and debugging into an external call (FFI) leads to a false claim of "Unable to find function address."  Stepping over the call works; stepping into it make it look like it fails.
>>>
>>> I am curently using a 1.1 RC2 image and the 4.0.3 vm on Ubuntu.  I cannot easily move the offending code to Windows, nor do I particularly care to do so (feels good<g>), and FFI is fairly uncommon in Squeak/Pharo.
>>>
>>> Can anyone else tinker with this to see if it is real?
>>
>> IIRC when you're using the debugger, primitives are not evaluated.
>>
>>
>> Levente
>>
>>>
>>> Bill
>>>
>>>
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