[LLVMdev] r98459 break of ExceptionDemo

[Garrison Venn]

Forgot to add platform with issue: OS X 10.6.2. I have not tested elsewhere. 

Garrison

On Mar 18, 2010, at 14:20, Garrison Venn wrote:

> Hi Chris,
> 
> The MCSymbol r98459 patch of llvm seems to have broken the ExceptionDemo example. As the example is dying in the
> associated personality's first unwind search phase, which happens to have no language specific context, and is returning
> a _URC_CONTINUE_UNWIND, I believe the issue is generic and not specific to the example. However I'm not sure why then
> this wasn't seen in one of the test cases. Anyway just wanted to give a heads up as I'm studying this, just in case the problem
> is obvious to you. One way to reproduce this in trunk from root is to:
> 
> 1) set environment var BUILD_EXAMPLES 1
> 
> 2) svn switch -r 98458 http://llvm.org/svn/llvm-project/llvm/trunk
> 3) make
> 4) Debug/examples/ExceptionDemo 2
> 5) example will complete successfully
> 
> 6) svn switch -r 98459 http://llvm.org/svn/llvm-project/llvm/trunk
> 7) make
> 8) Debug/examples/ExceptionDemo 2
> 9) example will segv
> 
> Sorry I'm late identifying this. I'll keep on trying to isolate it further, though I'm guessing that the sensitivity is in JITDwarfEmitter.
> 
> Garrison
> 
> PS: Patch ref: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20100308/097798.html