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Re: [Pharo-users] Pharo 4 Image Freeze

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Nicolai Hess
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Re: [Pharo-users] Pharo 4 Image Freeze

Nicolai Hess


2015-06-01 23:44 GMT+02:00 Craig Johnson <[hidden email]>:
Sure thing.

To see the bug, file the code below into a clean image and run the example.  The when the debugger pops, step over each line in the method.  I'm doing this on a Windows OS.

Object subclass: #Cooler
    instanceVariableNames: ''
    classVariableNames: ''
    poolDictionaries: ''
    category: 'ImageFreeze'!

!Cooler methodsFor: 'as yet unclassified' stamp: 'CraigJohnson 6/1/2015 23:31'!
runMe
    |  a |
    self halt.
    self except.
    a := 1.! !

"-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- "!

Cooler class
    instanceVariableNames: ''!

!Cooler class methodsFor: 'as yet unclassified' stamp: 'CraigJohnson 6/1/2015 23:16'!
example
    self new runMe ! !


This worked until pharo 40245
-> it looks like phase4 in issue
Wrong exception handler problem

introduced this behavior.




 



On 2015/06/01 11:00 PM, Esteban Lorenzano wrote:
well… pharo4 is not a beta :)
weird that no one else reports same bug… can you give us a way to reproduce the problem? Instead telling you which image does not have a problem I was not aware, I would like more to give you a bugfix :)

Esteban

On 01 Jun 2015, at 22:31, Craig Johnson <[hidden email]> wrote:


Hi All,

I'm getting tired of Pharo 4 beta freezing.  It happens whenever a exception occurs while in the debugger.

Funny that I don't remember any of the Pharo 4 development images freezing.

Which image can I use that won't do this?

Craig
stepharo
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Re: [Pharo-users] Pharo 4 Image Freeze

stepharo
I passed the info to martin mcClure.
May be he will have a look at the issue.

Le 2/6/15 00:12, Nicolai Hess a écrit :


2015-06-01 23:44 GMT+02:00 Craig Johnson <[hidden email]>:
Sure thing.

To see the bug, file the code below into a clean image and run the example.  The when the debugger pops, step over each line in the method.  I'm doing this on a Windows OS.

Object subclass: #Cooler
    instanceVariableNames: ''
    classVariableNames: ''
    poolDictionaries: ''
    category: 'ImageFreeze'!

!Cooler methodsFor: 'as yet unclassified' stamp: 'CraigJohnson 6/1/2015 23:31'!
runMe
    |  a |
    self halt.
    self except.
    a := 1.! !

"-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- "!

Cooler class
    instanceVariableNames: ''!

!Cooler class methodsFor: 'as yet unclassified' stamp: 'CraigJohnson 6/1/2015 23:16'!
example
    self new runMe ! !


This worked until pharo 40245
-> it looks like phase4 in issue
Wrong exception handler problem

introduced this behavior.




 



On 2015/06/01 11:00 PM, Esteban Lorenzano wrote:
well… pharo4 is not a beta :)
weird that no one else reports same bug… can you give us a way to reproduce the problem? Instead telling you which image does not have a problem I was not aware, I would like more to give you a bugfix :)

Esteban

On 01 Jun 2015, at 22:31, Craig Johnson <[hidden email]> wrote:


Hi All,

I'm getting tired of Pharo 4 beta freezing.  It happens whenever a exception occurs while in the debugger.

Funny that I don't remember any of the Pharo 4 development images freezing.

Which image can I use that won't do this?

Craig
Martin McClure-2
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Re: [Pharo-users] Pharo 4 Image Freeze

Martin McClure-2
On 06/04/2015 12:38 PM, stepharo wrote:
> I passed the info to martin mcClure.
> May be he will have a look at the issue.

Well, I can reproduce the problem, in Windows. In Linux, my usual
platform, the image does not hang. This suggests that the problem might
be in the Windows VM. Is there a way to get trace output from the VM so
I can see the sequence leading up to the hang, or a way to get a
Smalltalk stack trace from a C debugger?

Regards,

-Martin

>
> Le 2/6/15 00:12, Nicolai Hess a écrit :
>>
>>
>> 2015-06-01 23:44 GMT+02:00 Craig Johnson <[hidden email]
>> <mailto:[hidden email]>>:
>>
>>     Sure thing.
>>
>>     To see the bug, file the code below into a clean image and run the
>>     example.  The when the debugger pops, step over each line in the
>>     method.  I'm doing this on a Windows OS.
>>
>>     Object subclass: #Cooler
>>         instanceVariableNames: ''
>>         classVariableNames: ''
>>         poolDictionaries: ''
>>         category: 'ImageFreeze'!
>>
>>     !Cooler methodsFor: 'as yet unclassified' stamp: 'CraigJohnson
>>     6/1/2015 23:31'!
>>     runMe
>>         |  a |
>>         self halt.
>>         self except.
>>         a := 1.! !
>>
>>     "-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- "!
>>
>>     Cooler class
>>         instanceVariableNames: ''!
>>
>>     !Cooler class methodsFor: 'as yet unclassified' stamp:
>>     'CraigJohnson 6/1/2015 23:16'!
>>     example
>>         self new runMe ! !
>>
>>
>> This worked until pharo 40245
>> -> it looks like phase4 in issue
>> 11996 <https://pharo.fogbugz.com/default.asp?11996>
>> Wrong exception handler problem
>>
>> introduced this behavior.
>

Martin McClure-2
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Re: [Pharo-users] Pharo 4 Image Freeze

Martin McClure-2
On 06/04/2015 03:35 PM, Martin McClure wrote:
> On 06/04/2015 12:38 PM, stepharo wrote:
>> I passed the info to martin mcClure.
>> May be he will have a look at the issue.
>
> Well, I can reproduce the problem, in Windows. In Linux, my usual
> platform, the image does not hang. This suggests that the problem might
> be in the Windows VM. Is there a way to get trace output from the VM so
> I can see the sequence leading up to the hang, or a way to get a
> Smalltalk stack trace from a C debugger?

Well, the "trace" option to the VM sounded promising, but all that
yields is an access violation while the image is loading.

Regards,

-Martin


ccrraaiigg
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Re: [Pharo-users] Pharo 4 Image Freeze

ccrraaiigg
In reply to this post by Martin McClure-2

Hi Martin--

> ...the problem might be in the Windows VM. Is there a way to get
> trace output from the VM so I can see the sequence leading up to the
> hang, or a way to get a Smalltalk stack trace from a C debugger?

     You can evaluate, for example, printCallStack() from the Microsoft
Visual C++ debugger console. Or make a snapshot at that point with
primitiveSnapshot(), and poke around with the virtual machine simulator
on your preferred host platform.


-C

--
Craig Latta
netjam.org
+31   6 2757 7177 (SMS ok)
+ 1 415  287 3547 (no SMS)


Nicolai Hess
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Re: [Pharo-users] Pharo 4 Image Freeze

Nicolai Hess
In reply to this post by Martin McClure-2


2015-06-05 1:51 GMT+02:00 Martin McClure <[hidden email]>:
On 06/04/2015 03:35 PM, Martin McClure wrote:
> On 06/04/2015 12:38 PM, stepharo wrote:
>> I passed the info to martin mcClure.
>> May be he will have a look at the issue.
>
> Well, I can reproduce the problem, in Windows. In Linux, my usual
> platform, the image does not hang. This suggests that the problem might
> be in the Windows VM. Is there a way to get trace output from the VM so
> I can see the sequence leading up to the hang, or a way to get a
> Smalltalk stack trace from a C debugger?

Well, the "trace" option to the VM sounded promising, but all that
yields is an access violation while the image is loading.

Regards,

-Martin




This happens on linux too, but not always.
And  the image does not freeze, but it looks like an endless loop of dnu:

excerpt from the debug log:
Message>>sentTo:
Cooler(Object)>>doesNotUnderstand: #except
Message>>sentTo:
Cooler(Object)>>doesNotUnderstand: #except
Message>>sentTo:
Cooler(Object)>>doesNotUnderstand: #except
Message>>sentTo:
Cooler(Object)>>doesNotUnderstand: #except
Message>>sentTo:
Cooler(Object)>>doesNotUnderstand: #except
Message>>sentTo:
Cooler(Object)>>doesNotUnderstand: #except
Message>>sentTo:
Cooler(Object)>>doesNotUnderstand: #except
Message>>sentTo:
Cooler(Object)>>doesNotUnderstand: #except
Message>>sentTo:
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