Re: [PATCH 00/12] Initial support for ROCm platform (AMDGPU) debugging

[Simon Marchi <simark@simark.ca>]

On 12/6/22 08:57, Simon Marchi via Gdb-patches wrote:
> This patch series adds initial support for debugging programs offloaded
> to AMD GPUs using the ROCm platform.
> 
> Patches 1 to 11 are preparatory patches, and patch 12 is the big one.
> We included in that patch only what we consider to be the bare minimum
> for a cohesive first step, something that can be run and tested.  See
> the commit message of patch 12 for more details.
> 
> At the end of this series, it is possible to hit breakpoints in GPU code
> and resume execution until the end of the program.  Notably, GDB is not
> able to compute the backtrace, which is of course an important piece to
> do any real debugging.  Supporting this will require GDB to support some
> extensions to DWARF, which is a big piece in itself.  This part, as well
> as other features, will come as future patches.
> 
> Patch 12 also contains documentation changes.  This series was tested on
> Ubuntu 22.04, and no regressions appear for x86-64 / Linux debugging
> when and the AMDGPU / ROCm platform support is compiled in.
> Built-tested with --enable-targets=all.
> 
> Porting GDB to the ROCm platform brought up many challenges and has a
> few interesting differences, compared to a "standard" CPU port.  We did
> a presentation at the 2022 Cauldron, in Prague, that explains some of
> them:
> 
>   https://www.youtube.com/watch?v=X1iZ_Ta7jOo

FYI, I pushed patches 5, 7, 8 and 9, since they seemed like good
changes, independently from this series (and they were LGTM'ed by
Andrew).

Simon