llvm dev - Jan 2014 - [LLVMdev] Unable to catch Win64 exceptions that occur in the mcjit(ted) code

Hi all,

In my MSVC-compiled project I am using MCJIT to run some generated code. I
faced that in case of Win64 ('x86_64-pc-win32-elf') __try/__except block
doesn't work - the stack can not be unwound.
I have found that the only way to fix it is implementing my own
*registerEHFrames* function of the Memory Manager (but I'm not sure this
helps).

Maybe someone had a success solving the same problem?
What would be the best approach to catch exceptions from dynamically
generated code on Win64?

Thank you in advance

Best regard
Alexey
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Hi Aliaksei,

Exceptions on Win64 are not supported yet.
Kai Nacke is working on the implementation.

Yaron



2014/1/17 Aliaksei Zasenka <listhex at gmail.com>
>
> Hi all,
>
> In my MSVC-compiled project I am using MCJIT to run some generated code.
I faced that in case of Win64 ('x86_64-pc-win32-elf') __try/__except
block
doesn't work - the stack can not be unwound.
> I have found that the only way to fix it is implementing my own
registerEHFrames function of the Memory Manager (but I'm not sure this
helps).
>
> Maybe someone had a success solving the same problem?
> What would be the best approach to catch exceptions from dynamically
generated code on Win64?
>
> Thank you in advance
>
> Best regard
> Alexey
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
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Hi Yaron, Kai and all,

Thanks for your answer. What is the current status of the issue?

You wrote
>Kai Nacke implemented a patch for mingw32 / Win64 / SEH exceptions for the
LDC compiler on top of LLVM

Does it mean that Kai is working only on gcc-mingw Win64/SEH  support? Is
it planned to implement something like the *RtlAddFunctionTable*-based
registrar for dynamically loaded code?
May be I can help fixing it?

Aliaksei


2014/1/17 Yaron Keren <yaron.keren at gmail.com>
> Hi Aliaksei,
>
> Exceptions on Win64 are not supported yet.
> Kai Nacke is working on the implementation.
>
> Yaron
>
>
>
> 2014/1/17 Aliaksei Zasenka <listhex at gmail.com>
> >
> > Hi all,
> >
> > In my MSVC-compiled project I am using MCJIT to run some generated
code.
> I faced that in case of Win64 ('x86_64-pc-win32-elf')
__try/__except block
> doesn't work - the stack can not be unwound.
> > I have found that the only way to fix it is implementing my own
> registerEHFrames function of the Memory Manager (but I'm not sure this
> helps).
> >
> > Maybe someone had a success solving the same problem?
> > What would be the best approach to catch exceptions from dynamically
> generated code on Win64?
> >
> > Thank you in advance
> >
> > Best regard
> > Alexey
> >
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> >
>
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