[Vm-dev] Error: sweep failed to find exact end of memory

[Mariano Martinez Peck]

On Wed, Dec 8, 2010 at 1:00 AM, Andreas Raab <andreas.raab at gmx.de> wrote:

>
> The error means that the heap is corrupted. It has nothing to do with
> number of objects. Basically, what happens is that the garbage collector
> found that the last object it compacted in memory did not end exactly at the
> current allocation pointer. This cannot happen under any circumstances and
> means that the heap is in a corrupted state.
>

Thanks Andreas. And what does it mean that the "heap is corrupted"? can you
give me details?

Thanks again in advance,

Mariano


>
> Why it happens is your guess but I can tell you that it must've happened
> since the last (incr/full) GC since this test is extremely cheap and
> therefore done on every GC cycle.
>
> Cheers,
>  - Andreas
>
>
> On 12/7/2010 3:34 PM, Mariano Martinez Peck wrote:
>
>>
>>
>>
>>
>> Hi, I am having this error quite frequently while working with the
>> proxies for CompiledMethods. I don't understand....I am reaching a
>> maximum in the memory? I checked both, the amount of Objects I create
>> and the amount of memory and doesn't look that large.  I am in mac and I
>> am even doing -memory 1500m and also setting HeapSize in plist.info
>> <http://plist.info>.
>>
>>
>> Any hints?  I serached in Google and I found a bug with signed and
>> unsiged stuff...but i didn't understand and I am not sure which is the
>> status today (the threads were quite old).
>>
>> Here is an example:
>>
>>
>> sweep failed to find exact end of memory
>>
>> 594035904 Object>myDependents:
>> 594035812 Object>breakDependents
>> 594035720 Object>actAsExecutor
>> 594035628 StandardFileStream>actAsExecutor
>> 594035496 Object>executor
>> 594035332 WeakRegistry>add:
>> 594035240 >register:
>> 594035148 StandardFileStream>register
>> 594034104 StandardFileStream>open:forWrite:
>> 594032588 >fileNamed:
>> 594032496 FuelMareaSerializer>mareaUnserializeMethodFrom:
>> 594032216 >mareaLoadCompiledMethodFor:
>> 594032124 >mareaUninstallForProxy:ifNotInstalled:
>> 594032032 >mareaUninstallForProxy:
>> 594027820 >mareaHandleRun:with:in:forProxy:
>> 594027640 AbstractCompiledMethodProxy>run:with:in:
>> 593741548 OMenuMorph>drawOn:
>> 593741456 CompiledMethod>valueWithReceiver:arguments:
>> 593740508 >mareaHandleRun:with:in:forProxy:
>> 593740416 AbstractCompiledMethodProxy>run:with:in:
>> 593740324 Canvas>draw:
>> 593740232 Canvas>drawMorph:
>> 593740140 Morph>fullDrawOn:
>> 593740028 FormCanvas>roundCornersOf:in:during:
>> 593739936 Canvas>roundCornersOf:during:
>> 593739808 Morph>fullDrawOn:
>> 593739628 Canvas>fullDraw:
>> 593739536 Canvas>fullDrawMorph:
>> 593739004 WorldState>drawWorld:submorphs:invalidAreasOn:
>> 593738104 Rectangle>allAreasOutsideList:startingAt:do:
>> 593738012 Rectangle>allAreasOutsideList:do:
>> 593738708 WorldState>drawWorld:submorphs:invalidAreasOn:
>> 593737920 SequenceableCollection>do:
>> 593737652 WorldState>drawWorld:submorphs:invalidAreasOn:
>> 593737532 WorldState>displayWorld:submorphs:
>> 593737440 FormCanvas>roundCornersOf:in:during:
>> 593737348 Canvas>roundCornersOf:during:
>> 593737244 WorldState>displayWorld:submorphs:
>> 593737152 PasteUpMorph>privateOuterDisplayWorld
>> 593737004 PasteUpMorph>displayWorld
>> 593736912 WorldState>displayWorldSafely:
>> 593736820 BlockClosure>on:do:
>> 593736728 BlockClosure>ifError:
>> 593736636 WorldState>displayWorldSafely:
>> 593731064 WorldState>doOneCycleNowFor:
>> 593730972 WorldState>doOneCycleFor:
>> 593730880 PasteUpMorph>doOneCycle
>> 564294164 >spawnNewProcess
>> 564294036 BlockClosure>newProcess
>>
>>
>> But this is just one example.
>>
>> Thanks in advance for any help
>>
>> Mariano
>>
>
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