Mailman 3 June 2011 - pypy-dev

Understanding pypy
by Thomas Heller 09 Jun '11

09 Jun '11

I have read the blog posts about 'writing an interpreter with pypy' with large interest, but not tried the code myself. It seems that if I restrict myself to the RPython subset, then I can write programs with python syntax, and compile them to standalone executables, optionally containing a jit compiler. Is that correct? Are there any runtime dependencies? Thanks, Thomas

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Re: [pypy-dev] Patch: comtypes works with these changes.
by Laura Creighton 09 Jun '11

09 Jun '11

Thank you for the patches, which are most appreciated. If you have any more of them, can you send them to the bug tracker https://bugs.pypy.org/ ? Things posted to the mailing list sometimes get forgotten. Thank you, and thank you for the patches, Laura

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os.tmpnam warnings
by Da_Blitz 09 Jun '11

09 Jun '11

Hi pypy 1.5 does not display a warning when using the os.tempnam and os.tmpnam functions. use of these functions is not recommended as they can cause security issues and hence python issues a RuntimeWarning below is a patch to app_posix.py to make it act more like cpython ------------------------------------------ diff -r b590cf6de419 pypy/module/posix/app_posix.py --- a/pypy/module/posix/app_posix.py Fri Apr 29 17:42:40 2011 +0200 +++ b/pypy/module/posix/app_posix.py Mon Jun 06 23:15:15 2011 +1000 @@ -107,6 +107,10 @@ def tmpnam(): """Return an absolute pathname of a file that did not exist at the time the call is made.""" + from warnings import warn + from exceptions import RuntimeWarning + warn(RuntimeWarning("tmpnam is a potential security risk to your program")) + import tempfile return tempfile.mktemp() @@ -114,6 +118,10 @@ """Return an absolute pathname of a file that did not exist at the time the call is made. The directory and a prefix may be specified as strings; they may be omitted or None if not needed.""" + from warnings import warn + from exceptions import RuntimeWarning + warn(RuntimeWarning("tempnam is a potential security risk to your program")) + import tempfile return tempfile.mktemp('', prefix or 'tmp', dir)

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setpgrp and getpgrp platform:errors
by Da_Blitz 09 Jun '11

09 Jun '11

Hi below is a patch that removes these errors during translation or when using py.py i am poking with things i do not fully understand here and would prefer it if someone told me i was an idiot and that args were passed to the functions for some reason (eg compatibility with the BSD's). according to the man page on linux (debian) there are 2 calling conventions, the System V and the BSD the os.setpgrp and os.getpgrp do not appear to take arguments and so i just chopped them off and "Magic Happened" (tm) feel free to point out somthing i missed/broke/caused meltdown on ------------------------- diff -r b590cf6de419 pypy/rpython/module/ll_os.py --- a/pypy/rpython/module/ll_os.py Fri Apr 29 17:42:40 2011 +0200 +++ b/pypy/rpython/module/ll_os.py Mon Jun 06 23:26:35 2011 +1000 @@ -191,13 +191,13 @@ if hasattr(os, 'getpgrp'): self.GETPGRP_HAVE_ARG = platform.checkcompiles( - "getpgrp(0)", + "getpgrp()", '#include <unistd.h>', []) if hasattr(os, 'setpgrp'): self.SETPGRP_HAVE_ARG = platform.checkcompiles( - "setpgrp(0,0)", + "setpgrp()", '#include <unistd.h>', []) (

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Interactive fails on pypy
by Paolo Basso 08 Jun '11

08 Jun '11

Hi, I tryed to run the attached code with pypy but it fails (it works correctly with python 2.6). Can anybody tell me why? Thanks. P

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Arrays in rpython
by Timothy Baldridge 08 Jun '11

08 Jun '11

Is there a way in rpython to specify that a given list should be implemented as an array? I want to create a list of objects exactly 32 entries long. I could use [] but it seems like that would be slower than using an array. In CPython I can create an array of primitive types, but I'm looking to create a array of object types. Timothy -- “One of the main causes of the fall of the Roman Empire was that–lacking zero–they had no way to indicate successful termination of their C programs.” (Robert Firth)

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Notification: pypy-test2
by Bitbucket 07 Jun '11

07 Jun '11

You have received a notification from xoraxax. Hi, I forked pypy. My fork is at https://bitbucket.org/xoraxax/pypy-test2. -- Change your notification settings at https://bitbucket.org/account/notifications/

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Notification: pypy-test
by Bitbucket 07 Jun '11

07 Jun '11

You have received a notification from xoraxax. Hi, I forked pypy. My fork is at https://bitbucket.org/xoraxax/pypy-test. -- Change your notification settings at https://bitbucket.org/account/notifications/

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Re: [pypy-dev] [pypy-commit] pypy default: (arigo, bivab) implement longlong2float and float2longlong in a way that is more close to the C standard. On ARM/32bit this code was causing a reodering of instructions that filled one of the two words with
by Armin Rigo 07 Jun '11

07 Jun '11

Hi Anto, On Mon, Jun 6, 2011 at 8:58 PM, Antonio Cuni <anto.cuni(a)gmail.com> wrote: > speaking of portability, what about using sizeof(double)/sizeof(char) instead > of hardcoding 8? That change was not about portability, but about C compilers getting too clever at optimizing. These two functions are (supposed) to be only used on machines with 8-byte long longs and doubles. I could add an assert, checking that sizeof(double) == sizeof(long long) == 8. Armin.

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CFP: IWTC 2011: First International Workshop on Trace Compilation
by Carl Friedrich Bolz 07 Jun '11

07 Jun '11

IWTC 2011: First International Workshop on Trace Compilation August 24, 2011, Kongens Lyngby, Denmark Colocated with PPPJ 2011 === SCOPE === The first International Workshop on Trace Compilation (IWTC) aims to bring together researchers and practitioners who study trace compilation and optimization techniques within statically and dynamically typed programming languages. The workshop will be co-located with PPPJ 2011, August 24-26, at the Technical University of Denmark, Kongens Lyngby, Denmark. We invite papers on all topics related to trace compilation, including but not limited to: Trace recording and compilation Trace compilation for static and dynamic languages VM integration of trace compilers Novel optimizations for trace based compilers Novel intermediate representations for trace based compilers Formal aspects of traces Integration of trace compilers and method compilers Traces in binary translation systems Trace collection and analysis Testing of trace based compilers Industry / experience papers Tool demonstration === IMPORTANT DATES === June 20, 2011 Paper Submission July 15, 2011 Author Notification August 1, 2011 Camera Ready Submissions === SUBMISSION GUIDELINES === All papers must represent original and unpublished work that is not currently under review. Papers will be evaluated according to their significance, originality, technical content, style, clarity, and relevance to the conference. At least one author of each accepted paper is required to attend the conference and present the paper. Papers should range between 4 and 6 pages. Please number the pages. The workshop proceedings will be published as part of the ACM International Proceedings Series and will be disseminated through the ACM Digital Library. The required format for the submission is the ACM SIGPLAN Proceedings Style, using 9-point font size. The author information containing the Latex and Word templates can be found at http://www.sigplan.org/authorInformation.htm. Please apply the ACM Computing Classification categories and terms. The submission website is at http://www.sigplan.org/authorInformation.htm. === PROGRAM COMMITTEE === - Michael Bebenita, University of California, Irvine (USA), chair - Borys J. Bradel, Altera Corporation (Canada) - Michael Franz, University of California, Irvine (USA) - Carl Friedrich Bolz, Heinrich-Heine-University Düsseldorf (Germany) - Andreas Gal, Mozilla Corporation (USA) - Ian Rogers, Azul Systems (USA) - Nikolai Tillman, Microsoft Corporation (USA) - Christian Wimmer, Oracle Corporation (USA) - Peng Wu, IBM T.J.Watson Research Center (USA) - Mathew Zaleski, University of Toronto (Canada)

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