Hi Raoul, On 27 April 2016 at 22:42, Raoul Veroy <rve...@cs.tufts.edu> wrote: > First a question about the old reference counting implementation in Pypy.
It is still there, used mainly by tests of the C backend. But it wasn't used for translating the full PyPy for many years now, so you are very likely to get into various problems. > I wanted to do some studies on reference counting and the implementation > does not have to be efficient or fast. Well, a good reference counting implementation would be able to remove a large fraction of the incref/decref operations, by clever code analysis. I don't really understand what kind of study might be interesting on a bad reference counting implementation like ours. > Secondly, I wanted to log a trace of all allocations of objects and all > updates to references. Is there infrastructure or tool that exists for this? No. I tried in the distant past to do that to track a hard bug, with some success, but it involved too many hacks to be merged back into "default". If you want to dig, it was the branch "lltrace", last check-in 2011-02-24. Nowadays there would be additional complications; for example, the JIT often allocates several objects using a single pointer bump. A bientôt, Armin. _______________________________________________ pypy-dev mailing list pypy-dev@python.org https://mail.python.org/mailman/listinfo/pypy-dev
