[MacRuby-devel] Return from thread context

[Perry Smith]

The file is:
./spec/frozen/language/return_spec.rb

I don't know how to describe which one other than the first describe  
that starts "in a Thread"

Currently it does:

The return keyword in a Thread
- raises a LocalJumpError if used to exit a threadSEGV recieved in  
SEGV handler
unknown: [BUG] Segmentation fault

Perry
Ease Software, Inc. ( http://www.easesoftware.com )

Low cost SATA Disk Systems for IBMs p5, pSeries, and RS/6000 AIX systems

On Jul 9, 2009, at 2:35 PM, Laurent Sansonetti wrote:

> 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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>
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