#pypy on 2019-07-17 — irc logs at freenode.irclog.whitequark.org

2018-11-25 07:18 arigato changed the topic of #pypy to: PyPy, the flexible snake (IRC logs: https://quodlibet.duckdns.org/irc/pypy/latest.log.html#irc-end ) | use cffi for calling C | mac OS and Fedora are not Windows

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00:15 <bbot2> Failure: http://buildbot.pypy.org/builders/rpython-win-x86-32/builds/172 [default]

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00:33 <bbot2> Failure: http://buildbot.pypy.org/builders/rpython-linux-x86-64/builds/202 [default]

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01:00 <bbot2> Started: http://buildbot.pypy.org/builders/own-linux-x86-32/builds/6541 [py3.6]

01:00 <bbot2> Started: http://buildbot.pypy.org/builders/pypy-c-jit-linux-x86-32/builds/5319 [py3.6]

01:00 <bbot2> Started: http://buildbot.pypy.org/builders/pypy-c-jit-macosx-x86-64/builds/4491 [py3.6]

01:00 <bbot2> Started: http://buildbot.pypy.org/builders/pypy-c-jit-linux-x86-64/builds/6318 [py3.6]

01:00 <bbot2> Started: http://buildbot.pypy.org/builders/own-linux-x86-64/builds/7568 [py3.6]

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01:21 <bbot2> Failure: http://buildbot.pypy.org/builders/rpython-linux-s390x/builds/141 [default]

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01:53 <bbot2> Failure: http://buildbot.pypy.org/builders/pypy-c-jit-win-x86-32/builds/4715 [default]

01:53 <bbot2> Started: http://buildbot.pypy.org/builders/pypy-c-jit-win-x86-32/builds/4716 [py3.6]

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02:06 <bbot2> Failure: http://buildbot.pypy.org/builders/pypy-c-jit-linux-x86-32/builds/5319 [py3.6]

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02:29 <bbot2> Failure: http://buildbot.pypy.org/builders/pypy-c-jit-linux-x86-64/builds/6318 [py3.6]

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02:49 <bbot2> Failure: http://buildbot.pypy.org/builders/own-win-x86-32/builds/2081 [default]

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03:38 <bbot2> Failure: http://buildbot.pypy.org/builders/own-linux-x86-32/builds/6541 [py3.6]

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04:03 <bbot2> Failure: http://buildbot.pypy.org/builders/own-linux-x86-64/builds/7568 [py3.6]

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05:00 <bbot2> Started: http://buildbot.pypy.org/builders/jit-benchmark-linux-x86-64/builds/2658

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05:45 <bbot2> Failure: http://buildbot.pypy.org/builders/pypy-c-jit-macosx-x86-64/builds/4491 [py3.6]

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06:51 <bbot2> Failure: http://buildbot.pypy.org/builders/pypy-c-jit-win-x86-32/builds/4716 [py3.6]

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07:17 <bbot2> Success: http://buildbot.pypy.org/builders/jit-benchmark-linux-x86-64/builds/2658

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09:24 <bbot2> Failure: http://buildbot.pypy.org/builders/jitbackendonly-own-linux-armhf-v7/builds/1567 [default]

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09:56 <cfbolz> arigato: cffi question, how can I query the value of preprocessor defined integers?

09:56 <cfbolz> (also, hi :-) )

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10:33 <bbot2> Success: http://buildbot.pypy.org/builders/jitbackendonly-own-linux-armhf/builds/1823 [default]

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11:12 <arigato> cfbolz: just do ffi.cdef("""#define FOO ..."""), and then in the final lib, read it with lib.FOO

11:12 <arigato> (literally ``...`` here)

11:13 <cfbolz> arigato: right

11:13 <cfbolz> arigato: is it possible that it's not actually documented? or did I just not find it?

11:14 <arigato> it should be documented, a sec

11:14 <arigato> https://cffi.readthedocs.io/en/latest/cdef.html, search for "integer constants and macros"

11:16 <cfbolz> ok, sorry

11:31 <bbot2> Failure: http://buildbot.pypy.org/builders/pypy-c-jit-linux-s390x/builds/1106 [default]

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13:49 <arigato> cfbolz: don't be sorry, this documentation is too terse and compact for its own good

13:50 <cfbolz> arigato: writing good documentation is hard

13:51 <cfbolz> arigato: I am writing a little c Library at the moment and using cffi and pytest to test it

13:52 <cfbolz> Using hypothesis to minimise segfaulting test cases by running them in a subprocess is quite awesome

13:53 <arigato> :-)

13:53 <Alex_Gaynor> cfbolz: if it's a parser or something like that that takes a string as input, you might also enjoy libFuzzer, it's quite good

13:54 <cfbolz> Alex_Gaynor: good plan

13:57 <antocuni> it seems that EP's photographers has captured one of the starting moments of the pyhandle idea :) https://www.flickr.com/photos/146052955@N06/48263222932/in/album-72157709591018892/

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14:03 <krono> hey. I need some advice. In an exposed primitive in my RPython vm, I want to make sure that all given arguments have a certain property (in my case, answer True to is_value).

14:04 <krono> What is the most jit-friendly way to do that? something along the lines of make_sure_not_resized would be cool but this seems the wrong level of abstraction

14:04 <arigato> antocuni: :-)

14:05 <arigato> krono: "assert is_value(x)" is what we usually do in RPython

14:06 <arigato> if computing is_value() is side-effect-free, then I think the JIT will remove it completely from the final traces but use the assertion while tracing

14:07 <arigato> (not completely sure about that)

14:07 <krono> arigato: thats my plan, but that'll be in a loop.

14:08 <arigato> try to use assert and look at the traces

14:08 <krono> https://www.irccloud.com/pastebin/5FKduXTu/

14:08 <arigato> ah, that's still fine if "objects_w" is of reasonable length and fixed for a given trace

14:09 <krono> the first, most probably, the second surely not. should I specialize on the length?

14:10 <arigato> I mean, when the JIT is busy making a trace, it's going to assume the length is constant for this particular trace

14:10 <krono> whereas… I really should look at the traces first…

14:11 <krono> arigato: thank you.

14:11 <arigato> if that's not the case, maybe you want "if not we_are_jitted(): ...do some extra checks...", in this case the JIT will completely ignore the extra checks

14:12 <krono> something like that. makes sense, thanks

14:20 <krono> baa, I seem to need to raise an exception, the assert does not cut it

14:22 <arigato> note that RPython won't statically learn something like "it's a list of `ThisActualSubclass`" from doing "for x in lst: assert isinstance(x, ThisActualSubclass)"

14:26 <xorAxAx> that fact needs to be established before inserting the items into the list, right?

14:27 <krono> arigato: this list transitions from the "guestland" to "vm land" where I use the elements to initialize other objects

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14:28 <krono> I have to make sure that those objects are only filled with is_value() objects.

14:28 <simpson> def coerce(x): assert isinstance(x, MyClass); return x;; def foo(l): xs = [coerce(x) for x in l]

14:28 <simpson> Coerce the elements before building the list, so that RPython thinks that the list's contents are all of the desired type.

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14:31 <krono> simpson: sounds good. sadly, I have a disjoint hierarchy…

14:31 <simpson> Hm. Dispatch on sum types, maybe? Not sure.

14:36 <krono> na, I have to work around that.

14:38 <krono> it looks like that: W_MyValue subclasses are is_value(), but also W_MyInteger and W_MyFloat, but none of other things in the Hierarchy. And i cannot easily metaprogrammatically change the superclass of W_MyInteger

14:38 <krono> or can I?

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14:38 <krono> (I have to monkey-patch in my stuff…)

15:18 <mjacob> if someone is interested in a mercurial sprint in leipzig: https://framadate.org/jIs6Idj4r8tldJKZ

15:21 <mattip> mjacob: EuroScipy is 2-6 Sept

15:22 <mjacob> mattip: good to know. not sure how big the overlap is, though.

15:23 <mjacob> mattip: except if we do a pypy sprint before or after the mercurial sprint ;)

15:27 <mjacob> mattip: nevermind the sentence about the overlap. i was misinterpreting your sentence a bit probably.

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21:00 <pamplemo1sse> trying to build pypy3 locally on NixOS, I am hitting a test failure: "FAIL: test_load_default_certs_env (test.test_ssl.ContextTests)"

21:01 <pamplemo1sse> is something broken?

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