llvm dev - Dec 2019 - addition of vendor dwarf operator extension.

Hello all,

There is one enhancement request open for dwarfv5,
http://dwarfstd.org/ShowIssue.php?issue=191107.1
The request is for addition of dwarf expression operator to swap the top of the
dwarf stack, the response seems positive but it may take some time till v6.
I like to add that operator as vendor extension but I am not sure how to go
about it for llvm/lldb. Currently I am using it as vendor specific extension on
our local fork.

Does adding it as vender specific extension seems like a good idea? If yes
please provide me the details about adding specific vendor.

Regards,

Chirag Patel
Software Engineer | Raincode Labs India
Tel: (+91) 080 41159811
Mob: (+91) 9049336744
www.raincodelabs.com<http://www.raincodelabs.com/>
[linkedin-button]<https://in.linkedin.com/in/chirag-patel->

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There are some vendor extensions already in LLVM/LLDB, though I guess the
main question would be: what's the motivation?

On Mon, Dec 2, 2019 at 3:14 AM Chirag Patel via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hello all,
>
>
>
> There is one enhancement request open for dwarfv5,
> http://dwarfstd.org/ShowIssue.php?issue=191107.1
>
> The request is for addition of dwarf expression operator to swap the top
> of the dwarf stack, the response seems positive but it may take some time
> till v6.
>
> I like to add that operator as vendor extension but I am not sure how to
> go about it for llvm/lldb. Currently I am using it as vendor specific
> extension on our local fork.
>
>
>
> Does adding it as vender specific extension seems like a good idea? If yes
> please provide me the details about adding specific vendor.
>
>
>
> Regards,
>
>
>
> *Chirag Patel*
>
> Software Engineer | Raincode Labs India
>
> *Tel*: (+91) 080 41159811
>
> *Mob*: (+91) 9049336744
>
> *www.raincodelabs.com <http://www.raincodelabs.com/>*
>
> [image: linkedin-button] <https://in.linkedin.com/in/chirag-patel->
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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Hello,

Thanks for prompt reply.

Motivation,
In case of debugging of bi-endian dwarf and value known at runtime some of the
raw values needs to be byte swapped to change the endianity. We have a llvm
based compiler which generates such dwarf, TAG_variable marked as big endian and
debugging on little endian host using lldb. The listed operator on dwarf issues
does that, one operator instead of list of operators.

Proposal,
Addition of listed dwarf operator as vender extension in llvm/lldb till it gets
released.

Regards,

Chirag Patel
Software Engineer | Raincode Labs India
Tel: (+91) 080 41159811
Mob: (+91) 9049336744
www.raincodelabs.com<http://www.raincodelabs.com/>
[linkedin-button]<https://in.linkedin.com/in/chirag-patel->

From: David Blaikie <dblaikie at gmail.com>
Sent: 02 December 2019 19:51
To: Chirag Patel <Chirag at raincode.com>; Adrian Prantl <aprantl at
apple.com>; Paul Robinson <paul.robinson at sony.com>; Jonas
Devlieghere <jdevlieghere at apple.com>
Cc: llvm-dev at lists.llvm.org
Subject: Re: [llvm-dev] addition of vendor dwarf operator extension.

There are some vendor extensions already in LLVM/LLDB, though I guess the main
question would be: what's the motivation?

On Mon, Dec 2, 2019 at 3:14 AM Chirag Patel via llvm-dev <llvm-dev at
lists.llvm.org<mailto:llvm-dev at lists.llvm.org>> wrote:
Hello all,

There is one enhancement request open for dwarfv5,
http://dwarfstd.org/ShowIssue.php?issue=191107.1
The request is for addition of dwarf expression operator to swap the top of the
dwarf stack, the response seems positive but it may take some time till v6.
I like to add that operator as vendor extension but I am not sure how to go
about it for llvm/lldb. Currently I am using it as vendor specific extension on
our local fork.

Does adding it as vender specific extension seems like a good idea? If yes
please provide me the details about adding specific vendor.

Regards,

Chirag Patel
Software Engineer | Raincode Labs India
Tel: (+91) 080 41159811
Mob: (+91) 9049336744
www.raincodelabs.com<http://www.raincodelabs.com/>
[linkedin-button]<https://in.linkedin.com/in/chirag-patel->

_______________________________________________
LLVM Developers mailing list
llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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In addition to a number of things on the thread I'd like to see this
supported in gdb as well if we're going to emit it.

Thanks!

-eric

On Mon, Dec 2, 2019 at 12:14 AM Chirag Patel via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hello all,
>
>
>
> There is one enhancement request open for dwarfv5,
> http://dwarfstd.org/ShowIssue.php?issue=191107.1
>
> The request is for addition of dwarf expression operator to swap the top
> of the dwarf stack, the response seems positive but it may take some time
> till v6.
>
> I like to add that operator as vendor extension but I am not sure how to
> go about it for llvm/lldb. Currently I am using it as vendor specific
> extension on our local fork.
>
>
>
> Does adding it as vender specific extension seems like a good idea? If yes
> please provide me the details about adding specific vendor.
>
>
>
> Regards,
>
>
>
> *Chirag Patel*
>
> Software Engineer | Raincode Labs India
>
> *Tel*: (+91) 080 41159811
>
> *Mob*: (+91) 9049336744
>
> *www.raincodelabs.com <http://www.raincodelabs.com/>*
>
> [image: linkedin-button] <https://in.linkedin.com/in/chirag-patel->
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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