llvm dev - Jan 2010 - [LLVMdev] Exception Implementation Example added to Wiki

If the powers at be want this, I could easily transform the source to the LLVM
coding standards, and add
the necessary portable UNIX support--someone else would have to add non-UNIX
support although the
System library probably helps with this. However I'm guessing the LLVM
release flux of the exception system,
along with a lack of universal platform, dwarf JIT support might be a hinderance
in such an endeavor. I don't
know what the current platform boundaries are for either JIT or JIT with dwarf
emission, but I do know that
the LLVM exception design is being reconsidered for future releases (possibly
2.7?).

Also, as noted in the wiki, please see:

http://code.google.com/p/tart/ and 
http://www.incasoftware.de/~kamm/projects/index.php/2008/08/19/exception-handling-in-llvmdc-using-llvm/

for real world implementations. There are many others, as can be seen in the
LLVM project page.

Garrison

On Jan 8, 2010, at 20:06, OvermindDL1 wrote:
> On Fri, Jan 8, 2010 at 12:12 PM, Garrison Venn <gvenn.cfe.dev at
gmail.com> wrote:
>> I just added an exception example to the wiki intended to be run in a
JIT environment. Although this information is heavily date dependent,
>> as the LLVM exception subsystem will be modified as time goes on, I
could have used such an example when I was looking into this; hence the
submission.
>> Having said this, I'm not an LLVM expert, and even though the code
works, I'm sure there are omissions and inaccuracies, so if the experts have
>> the time ...
>> 
>> Hopefully some members of the community will find this beneficial
>> 
>> Garrison
>> 
>> PS: Is there a better to upload source to the wiki than merely pasting
it in? Only image file types seemed to be allowed for upload.
> 
> 
> Oh I could definitely use an example like that, would be very nice if
> there was such an example as an included project in LLVM itself like
> the other examples and tutorials, would force it to stay updated too.
> 
> EDIT:  Er, helps if I send to the LLVM list...
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

On Sat, Jan 9, 2010 at 5:54 AM, Garrison Venn <gvenn.cfe.dev at gmail.com>
wrote:
> If the powers at be want this, I could easily transform the source to the
LLVM coding standards, and add
> the necessary portable UNIX support--someone else would have to add
non-UNIX support although the
> System library probably helps with this. However I'm guessing the LLVM
release flux of the exception system,
> along with a lack of universal platform, dwarf JIT support might be a
hinderance in such an endeavor. I don't
> know what the current platform boundaries are for either JIT or JIT with
dwarf emission, but I do know that
> the LLVM exception design is being reconsidered for future releases
(possibly 2.7?).
>
> Also, as noted in the wiki, please see:
>
> http://code.google.com/p/tart/ and
>
http://www.incasoftware.de/~kamm/projects/index.php/2008/08/19/exception-handling-in-llvmdc-using-llvm/
>
> for real world implementations. There are many others, as can be seen in
the LLVM project page.
I am one such non-unix platform, so if the example does not work for
me, it is still as worthless as bad documentation for note...

Understood. Sorry for my lack of background on these platforms. Do you know if
llvm.eh.selector and dwarf emission
for a JIT execution environment works on your platform of choice? If so, and if
the unwind system conforms to
http://refspecs.freestandards.org/abi-eh-1.21.html, the port will not be too
bad. Beyond use of fprintf and strtoul, and
an include of unwind.h, I don't believe there is much else that is specific
to UNIX. These may even exist in your platform's
headers. The structures/APIs defined in unwind.h are fully defined and useable
as is in
http://refspecs.freestandards.org/abi-eh-1.21.html.

Garrison

On Jan 9, 2010, at 8:07, OvermindDL1 wrote:
> On Sat, Jan 9, 2010 at 5:54 AM, Garrison Venn <gvenn.cfe.dev at
gmail.com> wrote:
>> If the powers at be want this, I could easily transform the source to
the LLVM coding standards, and add
>> the necessary portable UNIX support--someone else would have to add
non-UNIX support although the
>> System library probably helps with this. However I'm guessing the
LLVM release flux of the exception system,
>> along with a lack of universal platform, dwarf JIT support might be a
hinderance in such an endeavor. I don't
>> know what the current platform boundaries are for either JIT or JIT
with dwarf emission, but I do know that
>> the LLVM exception design is being reconsidered for future releases
(possibly 2.7?).
>> 
>> Also, as noted in the wiki, please see:
>> 
>> http://code.google.com/p/tart/ and
>>
http://www.incasoftware.de/~kamm/projects/index.php/2008/08/19/exception-handling-in-llvmdc-using-llvm/
>> 
>> for real world implementations. There are many others, as can be seen
in the LLVM project page.
> 
> I am one such non-unix platform, so if the example does not work for
> me, it is still as worthless as bad documentation for note...
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev