[issue2733] mmap resize fails on anonymous memory

Change by Tim Golden : -- resolution: later -> duplicate superseder: -> multiple problems with mmap.resize() in Windows ___ Python tracker ___

[issue2733] mmap resize fails on anonymous memory

Tim Golden added the comment: Superseded by issue40915 -- ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: htt

[issue2733] mmap resize fails on anonymous memory

Change by Tim Golden : -- resolution: -> later stage: -> resolved status: open -> closed ___ Python tracker ___ ___ Python-bugs-lis

[issue2733] mmap resize fails on anonymous memory

Tim Golden added the comment: https://bugs.python.org/issue40915 is related Retargetting for 3.10+ -- assignee: -> tim.golden versions: +Python 3.10, Python 3.11 -Python 2.7, Python 3.2 ___ Python tracker __

[issue2733] mmap resize fails on anonymous memory

Piotr Zolnierczuk added the comment: I wonder if this is related to the problem I reported about two weeks ago http://bugs.python.org/issue12562? -- nosy: +zolnie ___ Python tracker

[issue2733] mmap resize fails on anonymous memory

Alexander Belopolsky added the comment: I don't see an actual crash reported. An unexpected exception is not a crash. Changing the type to "behavior". -- nosy: +belopolsky type: crash -> behavior ___ Python tracker

[issue2733] mmap resize fails on anonymous memory

Hirokazu Yamamoto added the comment: I still think we should forbid to resize anonymous memory map because this operation is really problematic. I think original poster's purpose can be fulfilled with creation of another mmap object with same tagname. Here is a patch for it. -- compone

[issue2733] mmap resize fails on anonymous memory (Windows)

Hirokazu Yamamoto added the comment: - Sorry for having clear solution for this. + Sorry for having no clear solution for this. ___ Python tracker ___

[issue2733] mmap resize fails on anonymous memory (Windows)

Hirokazu Yamamoto added the comment: More two cents which I noticed. (After the patch was applied) 1. On windows, resize for anonymous map can clear its contents. >>> import mmap >>> m = mmap.mmap(-1, 10) >>> m[:] = "0123456789" >>> m[:] '0123456789' >>> m.resize(20) >>> m[:] '\x00\x00\x00\x00

[issue2733] mmap resize fails on anonymous memory (Windows)

Changes by Hirokazu Yamamoto : Added file: http://bugs.python.org/file13131/mmapmodule.patch ___ Python tracker ___ ___ Python-bugs-list mailin

[issue2733] mmap resize fails on anonymous memory (Windows)

Tim Golden added the comment: Hirokazu Yamamoto wrote: > Hirokazu Yamamoto added the comment: > > I reconsidered this issue. When mmap is anonymous, > self->file_handle == INVALID_HANDLE_VALUE (-1), so we should not call > SetFilePointer and SetEndOfFile for this handle. I'm inclined to agre

[issue2733] mmap resize fails on anonymous memory (Windows)

Hirokazu Yamamoto added the comment: I reconsidered this issue. When mmap is anonymous, self->file_handle == INVALID_HANDLE_VALUE (-1), so we should not call SetFilePointer and SetEndOfFile for this handle. And the behavior of mmap.resize is not documented clearly though, current behavior for

[issue2733] mmap resize fails on anonymous memory (Windows)

Tim Golden added the comment: >From me, yes of course, but I assume you want another core dev for a 2nd opinion. ___ Python tracker ___ ___ Pyt

[issue2733] mmap resize fails on anonymous memory (Windows)

Hirokazu Yamamoto added the comment: Tim, I confirmed your test fails on my machine, and is fixed by your patch. I want to commit this. Can I? -- components: +Extension Modules, Windows -Library (Lib) nosy: +ocean-city stage: -> commit review versions: +Python 2.6, Python 2.7, Python 3

[issue2733] mmap resize fails on anonymous memory (Windows)

Tim Golden added the comment: Patch attached to mmapmodule.c and test_mmap.py -- keywords: +patch Added file: http://bugs.python.org/file13107/mmapmodule.patch ___ Python tracker ___

[issue2733] mmap resize fails on anonymous memory (Windows)

Tim Golden added the comment: OK, I can see why this is happening and in fact there are two levels of problem. The trouble is that, in my ignorance, I can't work out exactly why the existing code is doing what it's doing. (References to mmapmodule.c at r69666) Problem 1: At line 456, the Creat

[issue2733] mmap resize fails on anonymous memory (Windows)

Changes by Trent Nelson <[EMAIL PROTECTED]>: -- nosy: +Trent.Nelson __ Tracker <[EMAIL PROTECTED]> __ ___ Python-bugs-list mailing list Unsubscr

[issue2733] mmap resize fails on anonymous memory (Windows)

Kathryn M Kowalski <[EMAIL PROTECTED]> added the comment: sorry Added file: http://bugs.python.org/file10170/testofResize.py.txt __ Tracker <[EMAIL PROTECTED]> __ _

[issue2733] mmap resize fails on anonymous memory (Windows)

Amaury Forgeot d'Arc <[EMAIL PROTECTED]> added the comment: It seems that you attached the output file instead of a python script... -- nosy: +amaury.forgeotdarc __ Tracker <[EMAIL PROTECTED]> ___

[issue2733] mmap resize fails on anonymous memory (Windows)

New submission from Kathryn M Kowalski <[EMAIL PROTECTED]>: We have a shared memory module that has been running fine on Windows with Active State Python 2.4.3 Build 12. On machines with 2.5.1.1 mmap.resize fails on an existing anonymous shared memory. The attached file is a stripped down ve