[MacRuby-devel] Return from thread context

[Laurent Sansonetti]

Hi Perry,

Which spec are you talking about specifically?

Laurent

On Jul 9, 2009, at 5:56 AM, Perry Smith wrote:

> The spec says that a 'return' from a thread should raise a  
> LocalJumpError.
>
> Looking at the code for RETURN_NODE in compiler.cpp, the question of  
> "Is this a thread" is never asked.  And, I guess this exception is  
> only for the top level block of the thread since a function called  
> from the block could do a return.
>
> I looked briefly at the Thread create process and I didn't see  
> anything that flagged the block passed as the top level block for  
> the thread.
>
> The testcase causes a segmentation fault.  I looked at the signal  
> handler too and it appears as if it is "lets do this for now and  
> address it later" code.  The SEGV fault handler simply sets a flag  
> and returns.  The return will put us back where we were just at so  
> we immediately seg fault again and then we do an exit -- with no  
> core file.
>
> I don't see the value of catching SEGV in the first place unless the  
> underlying Ruby code has asked us to do that.  I think that would  
> generally apply to all signals.
>
> Perry
>
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