GSoC: Implementation of OMPD

[Martin Jambor]

Hi Tony,

sorry for a late reply, things are a bit crazy recently.

On Sat, Mar 07 2020, y2s1982 . wrote:
> Hello everyone,
>
> My name is Tony Sim. In anticipation to planning for my last summer within
> my degree program, I am considering to take part in the Google Summer of
> Codes.  In particular, I would like to work on implementing OMPD for GCC
> and related programs.
>
> I have studied CPU and GPU parallel programming in the span of two
> semesters, which included OpenMP as a significant part of the curriculum. I
> am quite fascinated by its possibilities and would love a chance to learn
> more while tackling a real-world challenge.
>
> I would appreciate any additional information on the project.  It looks
> very interesting. Really, it sounds like something I wish I had when I was
> taking the course.
>

The OMPD project idea might be the most ambitious from the whole lot.
Basically, the goal is to come up with a prototype implementation of
chapter 5 of OpenMP 5.0 Specification
(https://www.openmp.org/specifications/), so that OpenMP programs
compiled with GCC can be debugged in GDB using OpenMP terminology.

In order to start you need to understand how OpenMP programs are
internally structured (compile some a few basic ones with
-fdump-tree-optimized and then examine the generated dump) and
especially familiarize yourself with the libgomp library that provides
essential run-time support to OpenMP programs.  Libgomp is part of GCC
project, see https://gcc.gnu.org/git/?p=gcc.git;a=tree;f=libgomp.

The long-term goal is to implement that chapter 5 in libgomp, so that
internal structures of libgomp and the run program can be exposed with
this interface.  Of course, that would be too big a project for one
summer, so the immediate goal would be to come up with an implementation
of a subset that would behave well in a given set of contexts... and
either make it consumable by GDB or at the very least demonstrate that
it can be done.  Still a lot of work.

If you have any further questions, please feel free to ask.

Good luck with your GSoC!

Martin