64bit Dll not working on IIS 8 with windows server 2012 standard edition 64 bit

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Hi Experts,

I have on asp.net application deployed on IIS 8 in Windows Server 2012 Standard Edition 64 Bit.

In the dependency of my asp.net application, One DLL is present in its bin directory. This DLL
is build on Any CPU Platform.

Suppose The name of this DLL is X.dll build on Any CPU

now this X.dll is calling native dll.
Suppose the name of native dll is a32.dll and a64.dll
With the length of pointer I Decide that which dll has been import...

If I enable32 bit application in application pool, then it is working fine, because it is detecting always 32 bit native dll in 64bit server.

But If i disable 32 bit application in application pool it crash my application.
That means it is always try to execute a32.dll on 64bit system.
Then Why my a64.dll is not working on 64bit system.

When I try to call same things in windows application. it is working fine with a64.dll in same 64bit server, but in IIS 8 It is not working.

I have tried several things like ApplicationHost settings, application.config setting,
remove entry of 32 bit aspnet_filter.dll, unregister 32 bit asp.net in IIS , so and so...

How can I resolve this issue. I have to run a64.dll instead of a32.dll in 64bit server.

Thanks in advance.

Posted 5-Jun-13 19:53pm

Mr. Mahesh Patel

Updated 5-Jun-13 19:54pm

v2

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RedDk 6-Jun-13 15:01pm

64-bit Windows Server running on what AMD ... INTEL ...?

RedDk 7-Jun-13 14:50pm

Day Two ...
Have you tried retaining the 32-bit app but this time change how (any) execution takes place by adding ALL to the "pool" I think it's called. Sorry, my encounters are strictly IIS 7 so this is only a guess.

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-06-05T20:33:00

Solution 1

Just in case: did you take into account that there is one 32-bit x86 architecture, but two different, incompatible 64-bit architectures in Intel: x86-64, and IE64 (Itanium). If not, check it out:
http://en.wikipedia.org/wiki/X86-64[^],
http://en.wikipedia.org/wiki/Itanium[^].

—SA

Posted 5-Jun-13 20:33pm

Sergey Alexandrovich Kryukov

Comments

Mr. Mahesh Patel 6-Jun-13 3:36am

no, it is not like intel:x86-64. This is pure 64 bit processor and 64 bit OS

Sergey Alexandrovich Kryukov 6-Jun-13 9:43am

What do you mean no?! There is no such thing as "pure 64-bit processor". It must be one of the two I mentioned. Please check it up.
—SA

RedDk 6-Jun-13 12:56pm

I suspect what he is trying state is that his "app" that he wants to run is a 64-bit app (typically to access more than 4GB memory, right?) and a 32-bit processor is not going to be as "pure" as a potentially 64-bit one might be ...

Sergey Alexandrovich Kryukov 6-Jun-13 13:17pm

I would not understand that... :-)
The things are as simple as that, exactly as I described. OP simply does not understand that x98-64 is the most usual "64-bit processor" and that there is incompatible original IE-64 aka Itanium. And both run as x86 via WoW64...
—SA

RedDk 6-Jun-13 14:52pm

Yes, but "x86" is your term. By "pure" he acknowledges that the fault is in the WOW64 but he doesn't know wher or why or how. Which is why I say that perhaps the misidentification that Windows seems to make wrt processor might have a memory component attached. Especially when using VS to select platform. After all that's still only 32-bit.

[Edit]
The box I'm running on right now is Intel 64-bit processor. And it's not Itanium ... Which isn't to say that Windows 32-bit OS can't be installed on this motherboard. It's all about adressing >4GB memory.
[End Edit]

Sergey Alexandrovich Kryukov 6-Jun-13 15:00pm

Yes, very basically, but the "not Itanium" you and most of people use is called x86-64 (AMD architecture later embraced by Intel)...
—SA

RedDk 6-Jun-13 15:07pm

Oh ok,

That would explain why Windows misidentifies the Hyperthreading 64-bit CPU as Itanium then (it ain't dancing with the one what brung it)
[edit]
... so this statment is not entirely true ... and apparently besides the point now. See beneath.
[end edit]

Sergey Alexandrovich Kryukov 6-Jun-13 15:22pm

What is that misidentification and how come it becomes explainable? I did not get it...
Where this identification came from?
—SA

RedDk 6-Jun-13 15:28pm

Honestly, I'd have to go digging for the exact message. I believe here on Windows Server 2008 in "Server Manager" my processor is pegged as "Itanium". And, Sergey, I have never ever seen "x86-64" anywhere in a decade of Windows use until today. I even clicked on the wikilink!
[Edit]
I't a mis-identification that crops up now and again in various messages ... something akin to the false factoid that the network connection is IPv6 enabled/not enabled. It is here but it's not here
{edit end]

Sergey Alexandrovich Kryukov 6-Jun-13 16:03pm

OK, this would be good to know.

As to the name of architecture, click on my two links above and you will see their "real" and "historical" name. This is, by its origin, "AMD 64", extension of IA-32. Everything else is jargon. One popular jargon name set is this: "i64" for x86-64=AMD-64, and "ia64" for IA-64=Itanium. Roughly speaking, Intel came up with "real" IA-64, but later AMD came up with cheap and less powerful AMD-64; and later, due it popularity, Intel embraced it as x85-64. Cheap stuff wins, by apparent reasons... :-)

—SA

RedDk 7-Jun-13 13:50pm

Found it ...

Sacrosanct commandline output (set):
.
.
.
PROCESSOR_ARCHITECTURE=AMD64
PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 15 Stepping 6, GenuineIntel
PROCESSOR_LEVEL=6
PROCESSOR_REVISION=0f06
.
.
.

That says it, right?

Sergey Alexandrovich Kryukov 7-Jun-13 14:17pm

It does. Now, AMD64 is the same as x86-64, aka "i64", but not IE64, which is incompatible.
Thank you for the note.
—SA

Mr. Mahesh Patel 7-Jun-13 0:27am

I mean it is not that the OS is 64 bit and Processor is 86 bit, But It Is Intel X64 Bit processor, No any AMD processor.

Sergey Alexandrovich Kryukov 7-Jun-13 0:32am

Read!!!!!!!!!!!!!!!
—SA