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Paper Details


%T Another Side of SPoC: occam\[rs]s ALTer Ego Dissected with PC\-lint
%A √ėyvind Teig
%E Barry M. Cook
%B Proceedings of WoTUG\-22: Architectures, Languages and Techniques for Concurrent Systems
%X 26500 lines of Standard C (ANSI C) generated from occam
   sources by the Southampton Portable occam Compiler (SPoC)
   has been analysed by the static analysis tool PC\-lint. The
   target machine is a TMS320C32 DSP where all (the supported)
   C\\[rs]s primitive data types are mapped to 32 bit read and
   writes. This architecture stretches "ANSI"
   C quite a bit, but the "portable" occam
   compiler promised to handle it. Even if we had experienced
   no problems with the generated code and it compiled with all
   error handling enabled, we had to insert some 15\-20
   different global PC\-lint filters plus local filters via
   in\-line C in the occam sources. This was in addition to the
   base\-level filters we also used for hand\-written C. It
   kept PC\-lint quiet, for individual C files as well as
   "global wrap up". By discussing each
   individual filter we arrive at the conclusion that none hid
   errors in the generated C. The analysis revealed a few
   points where the occam language definition could have been
   made stricter. We would like to PC\-lint the generated
   sources with fewer messages disabled \- changes to SPoC are
   therefore suggested. Altogether SPoC seems to have passed
   this test quite well. Even if we have no expertise to modify
   the (open) SPoC sources, this report could be considered as
   contributing to a prospective "Bazaar"
   development model \- to bring forward an even more robust
   compiler for a portable and perhaps prospering occam
   language.


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