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GNU Cauldron 2012, Prague, talk11

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Published on Jul 19, 2012

Presenters: Kevin POUGET, Miguel SANTANA, Jean-François MEHAUT and Vania Marangozova-Martin

In this presentation, we will introduce the work we have undertaken in a join R&D effort of STMicroelectronics and the Laboratoire d'Informatique de Grenoble on the GDB project.

In the context of parallel and embedded computing, debugging is well- recognized as a complex activity. Nowadays, such applications are not developed anymore from scratch, relying only on the programming language primitives. Instead, they lean upon more advanced programming models allowing an easier expression of parallelism.

Interactive debuggers like GDB evolved from their earlier times when they could only handle machine instructions to support the source languages used by developers to write their applications. We believe that their next evolution could be the support of programming models, which would help the developers to manipulate higher level abstractions like the entities or communication mechanisms defined by the programming model. These abstractions will have the advantage of being closer to the concepts the developer dealt with during development time and they will help her to keep focused on application execution behaviour.

Hence, our work consists in improving GDB towards the support of such programming models. On top of GDB's Python interface, and extending it with contributed patches whenever it was required, we prepared a framework supporting the debugging of an ST home-made embedded component framework for MPSoC systems, running on an x86 simulator. The presentation will detail how we leveraged GDB to gather relevant runtime information about the component framework and the set of new features we developed, along with use-cases about their usage.

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