[Ironpython-users] IronPython always in 32-bit mode on 64bit machine even when running ipy64.exe

[Vernon D. Cole]

I find that the following works (on all versions I have tested, including
Jython):


> import sys

def Python_is_64bit():
>     if sys.platform == 'cli': #IronPython
>         import System
>         return System.IntPtr.Size == 8
>     else:
>         try:
>             return sys.maxsize > 2147483647
>         except AttributeError:
>             return sys.maxint > 2147483647
>

--
Vernon Cole


On Wed, May 8, 2013 at 8:14 AM, Chong, Petra (HARVEY NASH) <
Petra.Chong at uk.bp.com> wrote:

> I do indeed get output that looks like yours - ****
>
> ** **
>
> c:\Program Files (x86)\IronPython
> 2.7>c:\users\xxxxx\Downloads\corflags.exe ipy64.exe****
>
> Microsoft (R) .NET Framework CorFlags Conversion Tool.  Version
>  2.0.50727.42****
>
> Copyright (c) Microsoft Corporation.  All rights reserved.****
>
> ** **
>
> Version   : v4.0.30319****
>
> CLR Header: 2.5****
>
> PE        : PE32****
>
> CorFlags  : 9****
>
> ILONLY    : 1****
>
> 32BIT     : 0****
>
> Signed    : 1****
>
> ** **
>
> And if I then run this:****
>
> ** **
>
> c:\Program Files (x86)\IronPython
> 2.7>c:\users\xxxxx\Downloads\corflags.exe ipy.exe****
>
> Microsoft (R) .NET Framework CorFlags Conversion Tool.  Version
> 2.0.50727.42****
>
> Copyright (c) Microsoft Corporation.  All rights reserved.****
>
> ** **
>
> Version   : v4.0.30319****
>
> CLR Header: 2.5****
>
> PE        : PE32****
>
> CorFlags  : 11****
>
> ILONLY    : 1****
>
> 32BIT     : 1****
>
> Signed    : 1****
>
> ** **
>
> Thanks,****
>
> ** **
>
> PC****
>
> ** **
>
> ** **
>
> *From:* Curt Hagenlocher [mailto:curt at hagenlocher.org]
> *Sent:* 07 May 2013 17:46
> *To:* Chong, Petra (HARVEY NASH)
> *Cc:* ironpython-users at python.org
> *Subject:* Re: [Ironpython-users] IronPython always in 32-bit mode on
> 64bit machine even when running ipy64.exe****
>
> ** **
>
> Can you use corflags.exe to confirm that your ipy64.exe is actually not
> marked for 32-bit execution? Your output should look like this:****
>
>  ****
>
> PS D:\Program Files\Sho\bin> corflags .\ipy64.exe
> Microsoft (R) .NET Framework CorFlags Conversion Tool.  Version
> 3.5.30729.1
> Copyright (c) Microsoft Corporation.  All rights reserved.****
>
> Version   : v2.0.50727
> CLR Header: 2.5
> PE        : PE32
> CorFlags  : 9
> ILONLY    : 1
> 32BIT     : 0
> Signed    : 1****
>
>  ****
>
> ** **
>
> On Tue, May 7, 2013 at 9:34 AM, Chong, Petra (HARVEY NASH) <
> Petra.Chong at uk.bp.com> wrote:****
>
> (I also asked this on StackOverflow -
> http://stackoverflow.com/questions/16422812/ironpython-always-in-32-bit-mode-on-64bit-machine-even-when-running-ipy64-exe- have copy pasted from there).
> ****
>
>  ****
>
> I am sure I am missing something simple but unfortunately a lot of
> searching hasn't thrown up what it is..****
>
> I am running Windows 7 64-bit (I verified this by looking at Control Panel
> > All Control Panel Items > System and seeing that it says 64-bit Operating
> System).****
>
> I have IronPython 2.7.3 installed from here (
> http://ironpython.codeplex.com/downloads/get/423690)****
>
> This has created the following shortcut (with no corresponding shortcut in
> C:\Program Files\IronPython 2.7...):****
>
> "C:\Program Files (x86)\IronPython 2.7\ipy64.exe"****
>
> If I run this, I get this prompt:****
>
> "c:\Projects>"C:\Program Files (x86)\IronPython 2.7\ipy64.exe"****
>
> IronPython 2.7.3 (2.7.0.40) on .NET 4.0.30319.296 (32-bit)****
>
> The docs from an older version of IronPython (2.6) at
> http://ironpython.codeplex.com/releases/view/27350 say that:****
>
> "A very visible new feature added to this release is that ipy.exe is now
> strictly a 32-bit only assembly. That is, it gets executed as a 32-bit CLR
> process on both x86 and x64 operating systems. ipy64.exe, despite what its
> name might imply, is a platform agnostic assembly matching the old behavior
> of ipy.exe in the sense that it gets executed as a 32-bit process on 32-bit
> OSes and 64-bit on 64-bit OSes."****
>
> From this, I infer that ipy64 should have started as a 64 bit process, but
> that's not what shows in the prompt.****
>
> Any ideas what I am doing wrong? Thanks in advance..****
>
> Edited to add: I have also tried running the following in the IronPython
> shell, which I found from another question on this site, to check whether
> the OS is 64 bit****
>
> >>> import System****
>
> >>> System.Environment.Is64BitOperatingSystem****
>
> True****
>
> ... but then I ran the following which indicates that IronPython really is
> running in 32 bit mode.****
>
> >>> import System****
>
> >>> System.IntPtr.Size****
>
> 4****
>
>  ****
>
> I have tested that I have 64-bit .NET installed by creating a console
> application in Visual Studio with the line
> Console.WriteLn(System.IntPtr.Size) and verifying that the output is "8".
> ****
>
>  ****
>
> Thanks,****
>
>  ****
>
> PC****
>
>
> _______________________________________________
> Ironpython-users mailing list
> Ironpython-users at python.org
> http://mail.python.org/mailman/listinfo/ironpython-users****
>
> ** **
>
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