Are there any known 32/64 bit issues on Windows?

[Jens v.P.]

Hi all,

I have written a software using LWJGL. On my system (Mac OS X) everything works fine on 32 and on 64 bit. I have also tested the system in a VM with Windows XP (32 bit). Unfortunately, a user reported problems when running the system on Windows 7 (64bit) with a 32 bit Java. This is his output:

----------------------------------------
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x691da262, pid=4296, tid=4004
#
# JRE version: 6.0_22-b04
# Java VM: Java HotSpot(TM) Client VM (17.1-b03 mixed mode, sharing windows-x86 )
# Problematic frame:
# C  [atioglxx.dll+0x1aa262]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j  org.lwjgl.opengl.GL11.nglDrawArrays(IIIJ)V+0
j  org.lwjgl.opengl.GL11.glDrawArrays(III)V+20
----------------------------------------

The system log shows, besides others, that the following dlls are loaded:

----------------------------------------
...
C:\Windows\system32\OPENGL32.dll
C:\Windows\system32\GLU32.dll
C:\Windows\system32\atioglxx.dll
.. eclipse-modeling-galileo-SR2-incubation-win32\eclipse\plugins\org.lwjgl_2.6.0\native\windows\lwjgl.dll
...
----------------------------------------

This seems to be the 32bit version, is that correct?

Could this be a 32 vs 64 bit issue or is it simply a problem of the atioglxx.dll driver (in combination with glDrawArrays)?

Cheers,

Jens

[jediTofu]

I use Windows 7 64-bit mainly, and it works fine.

Why is he using the 32-bit version of Java?  LWJGL selects the native libraries based on the System's properties, which would be 64-bit for his system.

[Jens v.P.]

@jediTofu: He is using the 32-bit version of Java, as the software actually is an Eclipse plugin, which requires Eclipse 3.5 (3.6 doest not work). At the Eclipse download page, only a 32 bit Eclipse 3.5 is available  for Windows.

Besides, as far as I read the log, the 32 bit version is selected, isn't it? In native/windows, all DLLs come in two version. I assume lwjgl.dll is 32 bit, and lwjgl64.dll is the 64 bit version. So it seems as if the 32 bit version is loaded?

Cheers,
Jens

[jediTofu]

Well, to find out if this is either a 32-bit vs 64-bit problem or an atioglxx.dll driver problem, you'll probably need to have him try compiling the LWJGL code in a 64-bit JDK (with either javac or ant build scripts).

I assume that Eclipse would have the same functionality as NetBeans where you can select the Java Platform.  I've had a 32-bit version of NetBeans before, and I just had to manually download/install the 64-bit JDK/JRE from Java's website and then select that as the default Java platform within the IDE, as the IDE is just a wrapper around it anyway.