Re: [ptp-dev] Subscript out of range on AIX in AbstractRemoteResourceMan

[Dave Wootton <dwootton@xxxxxxxxxx>]

Greg
I see different behavior on Linux/gtk and Aix/Motif Eclipse. On AIX, I 
open the new resource manager wizard and select 'PE' from the list of 
available RM types then click next. At that point, the breakpoint I have 
set on the updateRemotePlugin method triggers, before the second page of 
the wizard displays. On Linux, when I do the same thing, the breakpoint 
does not trigger. It only triggers after the 2nd page is displayed and I 
click the 'new' button.

For AIX, it looks like what is going on is the following at the breakpoint
1) updateRemotePulldown() calls remoteCombo.removeAll() (approx line 421)
2) The Combo class calls OS.XmTextSetString, which in turn calls 
OS._XmTextSetString
3) _XmTextSetString calls Display.windowProc (presumably the Motif 
ComboBox widget has invoked a XmNvalueChangedCallback due to clearing the 
combo box list)
4) The Combo class handles the event and calls 
AbstractRemoteResourceManagerConfigurationWizardPage$1.modifyText (the 
listener for the ModifyEvent)
5) The listener calls updateRemotePulldown
6) At approx line 381, updateRemotePulldown calls 
remoteCombo.getSelectionIndex()
7) Since the combo box is not displayed and/or because the combo box is 
empty (from step 1), there cannot be a selection made, so 
getSelectionIndex() returns -1.
8) Subscript out of range exception.

I fixed this by ensuring that the selection index was >=0. Would the 
correct solution be that if selection index is -1 (no selection), that 
this method does nothing?

Unfortunately, I think this potentially affects any place where we use 
combo widgets. Assuming this is correct behavior, I wonder how the rest of 
eclipse deals with this.

This man page explains a little about ComboBox and XmNvalueChangedCallback

http://hpux.ewi.tudelft.nl/hppd/hpux/Development/Libraries/ComboBox-1.32/man.html

Dave



Greg Watson <g.watson@xxxxxxxxxxxx> 
Sent by: ptp-dev-bounces@xxxxxxxxxxx
08/06/2007 09:26 PM
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Subject
Re: [ptp-dev] Subscript out of range on AIX in 
AbstractRemoteResourceManagerConfigurationWizardPage






Ugh, I don't have an AIX machine to even begin to look at this. I can 
take a look at the code to see if I can figure out what is going on, 
but I suspect this may be an AIX/Motif thing. Particularly if it 
doesn't happen on Linux. If you can get a handle on what is going 
wrong, let me know. I'll try and give you a call in the next couple 
of days if you like.

Greg

On Aug 6, 2007, at 4:14 PM, Dave Wootton wrote:

> I've sorted out my problems with configure scripts and have my proxy
> successfully built for AIX. I've installed RSE runtime and RSE SDK 
> into my
> AIX installation and started my PTP session in a new workspace. I 
> created
> a Local connection from within the RSE perspective even though I'm not
> sure I needed one. Then I switched to the PTP perspective and tried 
> to add
> a new PE proxy. I get the first page of the proxy wizard and select 
> PE (my
> proxy type) from the list and click next. Nothing happens, except 
> for an
> ArrayIndexOutOfBoundsException with index -1 reported at line 381 of
> AbstractRemoteResourceManagerConfigurationWizardPage
> (updateConnectionPulldown()) is posted to the error log.
>
> I traced thru code for the call to remoteCombo.getSelectionIndex() 
> and in
> getSelection() I see a line 'if (OS.XmListPosSelected(argList[1], 
> index))
> return index - 1;
> This is returning -1. This is before my proxy wizard page is even
> displayed.
>
> If I modify the code in updateConnectionPulldown() to call
> remoteCombo.getSelectionIndex, and use the max of the returned 
> value or
> zero, then I do get the second wizard page and can create an entry 
> for my
> proxy.
>
> This all works correctly on x86 Linux, so I'm wondering if I missed
> something in my setup or if there is something odd going on with the
> AIX/Motif Eclipse.
>
> Dave
> _______________________________________________
> ptp-dev mailing list
> ptp-dev@xxxxxxxxxxx
> https://dev.eclipse.org/mailman/listinfo/ptp-dev
>

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