So I thought I'd be extra tricky with some partial continuation stuff and, as sometimes happens, things went Badly Wrong and the VM crashed. What was odd was that it said "last object overwritten", which I've not seen before.
Good news though: I have an image that will trigger the bug in a reproducible fashion! Since it's a 14M tarball, maybe I should mail it to Eliot separately... (but if anyone else wants a look I'm happy to supply a copy).
frank
Stack trace:
last object overwritten
Squeak VM version: 4.0-2678 #1 Wed Feb 6 11:36:48 PST 2013 gcc 4.1.2 Built from: CoInterpreter VMMaker.oscog-eem.264 uuid: 64e76092-8af7-449f-9188-e65f3bd1f08d Feb 6 2013 With: StackToRegisterMappingCogit VMMaker.oscog-eem.264 uuid: 64e76092-8af7-449f-9188-e65f3bd1f08d Feb 6 2013 Revision: VM: r2678 http://www.squeakvm.org/svn/squeak/branches/Cog Plugins: r2545 http://squeakvm.org/svn/squeak/trunk/platforms/Cross/plugins Build host: Linux mcqfes 2.6.18-128.el5 #1 SMP Wed Jan 21 10:44:23 EST 2009 i686 i686 i386 GNU/Linux plugin path: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678 [default: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/lib/squeak/4.0-2678/]
C stack backtrace: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x805cb71] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(error+0x19)[0x805ce59] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x8069bb3] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x80789ff] [0x77709183] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(interpret+0x1eb)[0x807f23b] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(main+0x397)[0x805d237] /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xbb1bd6] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x805ac41]
Smalltalk stack dump: 0xbfc80668 M MethodContext(Object)>copy 2037438000: a(n) MethodContext 0xbfc80684 M MethodContext(ContextPart)>copyTo: 2037438000: a(n) MethodContext 0xbfc806a8 M MethodContext(ContextPart)>copyTo: 2037437956: a(n) MethodContext 0xbfc806cc M MethodContext(ContextPart)>copyTo: 2037437880: a(n) MethodContext 0xbfc87548 M MethodContext(ContextPart)>copyTo: 2037440340: a(n) MethodContext 0xbfc8756c M MethodContext(ContextPart)>copyTo: 2037440248: a(n) MethodContext 0xbfc87590 M MethodContext(ContextPart)>copyTo: 2037439048: a(n) MethodContext 0xbfc875b4 M MethodContext(ContextPart)>copyTo: 2037440156: a(n) MethodContext 0xbfc875d0 M PartialContinuation>from:downTo: 2037440528: a(n) PartialContinuation 0xbfc875f0 M PartialContinuation class>from:downTo: 2032752868: a(n) PartialContinuation class 0xbfc87620 M BlockClosure>shift: 2037439144: a(n) BlockClosure 0xbfc8763c M BlockClosure>shift 2037439144: a(n) BlockClosure 0xbfc87654 M [] in Zipper class>zipOver: 2033885808: a(n) Zipper class 0xbfc87674 M [] in Zipper class>zipOver: 2033885808: a(n) Zipper class 0xbfc8769c M TestTree>collect: 2037413184: a(n) TestTree 0xbfc876cc I TestTree>collect: 2037413204: a(n) TestTree 0x7970d604 s TestTree>collect: 0x7970d630 s [] in Zipper class>zipOver: 0x7970d65c s [] in PartialContinuation>compose: 0x7970d690 s [] in Zipper>next: 0x7970d6c4 s [] in PartialContinuation>compose: 0x7970d700 s [] in Zipper>next: 0x7970d73c s [] in PartialContinuation>compose: 0x7970d780 s [] in Zipper>next: 0x7970d87c s [] in PartialContinuation>compose: 0x7970d8c8 s [] in Zipper>next: 0x7970d914 s [] in PartialContinuation>compose: 0x7970d968 s [] in Zipper>next: 0xbfc92558 M [] in PartialContinuation>compose: 2037435320: a(n) PartialContinuation 0xbfc92578 M [] in Zipper>next: 2037436996: a(n) Zipper 0xbfc92594 M BlockClosure>on:do: 2037437104: a(n) BlockClosure 0xbfc925b4 M BlockClosure>reset 2037437104: a(n) BlockClosure 0xbfc925cc M Zipper>next: 2037436996: a(n) Zipper 0xbfc925f4 M ZipperTest>testEnumerationWorksOverTrees 2035691720: a(n) ZipperTest 0xbfc9260c M ZipperTest(TestCase)>performTest 2035691720: a(n) ZipperTest 0xbfc92624 M [] in ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfc92640 M BlockClosure>on:do: 2037411540: a(n) BlockClosure 0xbfc92668 M [] in ZipperTest(TestCase)>timeout:after: 2035691720: a(n) ZipperTest 0xbfc92688 M BlockClosure>ensure: 2037412856: a(n) BlockClosure 0xbfc926b0 M ZipperTest(TestCase)>timeout:after: 2035691720: a(n) ZipperTest 0xbfc926d0 M [] in ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfcd0508 M BlockClosure>ensure: 2037409660: a(n) BlockClosure 0xbfcd0524 M ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfcd0540 M [] in TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd055c M BlockClosure>on:do: 2037409516: a(n) BlockClosure 0xbfcd0584 M [] in TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd05a0 M BlockClosure>on:do: 2037409368: a(n) BlockClosure 0xbfcd05c4 M TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd05e0 M ZipperTest(TestCase)>run: 2035691720: a(n) ZipperTest 0xbfcd05fc M TestRunner>runTest: 2034780632: a(n) TestRunner 0xbfcd0620 I [] in TestRunner>runSuite: 2034780632: a(n) TestRunner 0xbfcd0658 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfcd0678 M OrderedCollection>do: 2035691588: a(n) OrderedCollection 0xbfcd06a8 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfcd06d0 M [] in MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd504 M BlockClosure>on:do: 2035694312: a(n) BlockClosure 0xbfccd530 M [] in MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd550 M BlockClosure>ensure: 2035694164: a(n) BlockClosure 0xbfccd574 M MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd5a0 M ProgressInitiationException>defaultResumeValue 2035693376: a(n) ProgressInitiationException 0xbfccd5bc M ProgressInitiationException(Exception)>resume 2035693376: a(n) ProgressInitiationException 0xbfccd5d4 M ProgressInitiationException>defaultAction 2035693376: a(n) ProgressInitiationException 0xbfccd5f0 M UndefinedObject>handleSignal: 2004824068: a(n) UndefinedObject 0xbfccd610 M MethodContext(ContextPart)>handleSignal: 2035693708: a(n) MethodContext 0xbfccd62c M ProgressInitiationException(Exception)>signal 2035693376: a(n) ProgressInitiationException 0xbfccd644 M ProgressInitiationException>display:at:from:to:during: 2035693376: a(n) ProgressInitiationException 0xbfccd670 M ProgressInitiationException class>display:at:from:to:during: 2015244060: a(n) ProgressInitiationException class 0xbfccd69c M ByteString(String)>displayProgressAt:from:to:during: 2015249596: a(n) ByteString 0xbfccd6c4 M ByteString(String)>displayProgressFrom:to:during: 2015249596: a(n) ByteString 0xbfccc5d0 M OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfccc608 I [] in TestRunner>basicRunSuite:do: 2034780632: a(n) TestRunner 0xbfccc628 M BlockClosure>ensure: 2035693036: a(n) BlockClosure 0xbfccc64c I TestRunner>basicRunSuite:do: 2034780632: a(n) TestRunner 0xbfccc674 I TestRunner>runSuite: 2034780632: a(n) TestRunner 0xbfccc690 M TestRunner>runAll 2034780632: a(n) TestRunner 0xbfccc6b0 I PluggableButtonMorphPlus(PluggableButtonMorph)>performAction 2034847192: a(n) PluggableButtonMorphPlus 0xbfccc6d0 I PluggableButtonMorphPlus>performAction 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf534 M [] in PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf558 M Array(SequenceableCollection)>do: 2035687788: a(n) Array 0xbfccf574 M PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf598 I PluggableButtonMorphPlus>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf5b4 M PluggableButtonMorphPlus(Morph)>handleMouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf5d0 M MouseButtonEvent>sentTo: 2035688712: a(n) MouseButtonEvent 0xbfccf5ec M PluggableButtonMorphPlus(Morph)>handleEvent: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf608 M PluggableButtonMorphPlus(Morph)>handleFocusEvent: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf630 M [] in HandMorph>sendFocusEvent:to:clear: 2007171128: a(n) HandMorph 0xbfccf64c M BlockClosure>on:do: 2035688464: a(n) BlockClosure 0xbfccf678 M PasteUpMorph>becomeActiveDuring: 2013415124: a(n) PasteUpMorph 0xbfccf69c M HandMorph>sendFocusEvent:to:clear: 2007171128: a(n) HandMorph 0xbfccf6c4 M HandMorph>sendEvent:focus:clear: 2007171128: a(n) HandMorph 0xbfc755b4 M HandMorph>sendMouseEvent: 2007171128: a(n) HandMorph 0xbfc755d8 M HandMorph>handleEvent: 2007171128: a(n) HandMorph 0xbfc75604 M HandMorph>processEvents 2007171128: a(n) HandMorph 0xbfc75620 M [] in WorldState>doOneCycleNowFor: 2004979600: a(n) WorldState 0xbfc75644 M Array(SequenceableCollection)>do: 2004895736: a(n) Array 0xbfc75660 M WorldState>handsDo: 2004979600: a(n) WorldState 0xbfc75680 M WorldState>doOneCycleNowFor: 2004979600: a(n) WorldState 0xbfc7569c M WorldState>doOneCycleFor: 2004979600: a(n) WorldState 0xbfc756b8 M PasteUpMorph>doOneCycle 2013415124: a(n) PasteUpMorph 0xbfc756d0 M [] in Project class>spawnNewProcess 2012564228: a(n) Project class 0x79075924 s [] in BlockClosure>newProcess
Most recent primitives basicNew basicNew basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy
stack page bytes 4096 available headroom 3300 minimum unused headroom 3504
(last object overwritten)
On 27 February 2013 15:51, Frank Shearar frank.shearar@gmail.com wrote:
So I thought I'd be extra tricky with some partial continuation stuff and, as sometimes happens, things went Badly Wrong and the VM crashed. What was odd was that it said "last object overwritten", which I've not seen before.
Good news though: I have an image that will trigger the bug in a reproducible fashion! Since it's a 14M tarball, maybe I should mail it to Eliot separately... (but if anyone else wants a look I'm happy to supply a copy).
frank
mimimi.. (send it to me too, please ;)
Stack trace:
last object overwritten
Squeak VM version: 4.0-2678 #1 Wed Feb 6 11:36:48 PST 2013 gcc 4.1.2 Built from: CoInterpreter VMMaker.oscog-eem.264 uuid: 64e76092-8af7-449f-9188-e65f3bd1f08d Feb 6 2013 With: StackToRegisterMappingCogit VMMaker.oscog-eem.264 uuid: 64e76092-8af7-449f-9188-e65f3bd1f08d Feb 6 2013 Revision: VM: r2678 http://www.squeakvm.org/svn/squeak/branches/Cog Plugins: r2545 http://squeakvm.org/svn/squeak/trunk/platforms/Cross/plugins Build host: Linux mcqfes 2.6.18-128.el5 #1 SMP Wed Jan 21 10:44:23 EST 2009 i686 i686 i386 GNU/Linux plugin path: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678 [default: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/lib/squeak/4.0-2678/]
C stack backtrace: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x805cb71] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(error+0x19)[0x805ce59] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x8069bb3] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x80789ff] [0x77709183] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(interpret+0x1eb)[0x807f23b] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(main+0x397)[0x805d237] /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xbb1bd6] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x805ac41]
Smalltalk stack dump: 0xbfc80668 M MethodContext(Object)>copy 2037438000: a(n) MethodContext 0xbfc80684 M MethodContext(ContextPart)>copyTo: 2037438000: a(n) MethodContext 0xbfc806a8 M MethodContext(ContextPart)>copyTo: 2037437956: a(n) MethodContext 0xbfc806cc M MethodContext(ContextPart)>copyTo: 2037437880: a(n) MethodContext 0xbfc87548 M MethodContext(ContextPart)>copyTo: 2037440340: a(n) MethodContext 0xbfc8756c M MethodContext(ContextPart)>copyTo: 2037440248: a(n) MethodContext 0xbfc87590 M MethodContext(ContextPart)>copyTo: 2037439048: a(n) MethodContext 0xbfc875b4 M MethodContext(ContextPart)>copyTo: 2037440156: a(n) MethodContext 0xbfc875d0 M PartialContinuation>from:downTo: 2037440528: a(n) PartialContinuation 0xbfc875f0 M PartialContinuation class>from:downTo: 2032752868: a(n) PartialContinuation class 0xbfc87620 M BlockClosure>shift: 2037439144: a(n) BlockClosure 0xbfc8763c M BlockClosure>shift 2037439144: a(n) BlockClosure 0xbfc87654 M [] in Zipper class>zipOver: 2033885808: a(n) Zipper class 0xbfc87674 M [] in Zipper class>zipOver: 2033885808: a(n) Zipper class 0xbfc8769c M TestTree>collect: 2037413184: a(n) TestTree 0xbfc876cc I TestTree>collect: 2037413204: a(n) TestTree 0x7970d604 s TestTree>collect: 0x7970d630 s [] in Zipper class>zipOver: 0x7970d65c s [] in PartialContinuation>compose: 0x7970d690 s [] in Zipper>next: 0x7970d6c4 s [] in PartialContinuation>compose: 0x7970d700 s [] in Zipper>next: 0x7970d73c s [] in PartialContinuation>compose: 0x7970d780 s [] in Zipper>next: 0x7970d87c s [] in PartialContinuation>compose: 0x7970d8c8 s [] in Zipper>next: 0x7970d914 s [] in PartialContinuation>compose: 0x7970d968 s [] in Zipper>next: 0xbfc92558 M [] in PartialContinuation>compose: 2037435320: a(n) PartialContinuation 0xbfc92578 M [] in Zipper>next: 2037436996: a(n) Zipper 0xbfc92594 M BlockClosure>on:do: 2037437104: a(n) BlockClosure 0xbfc925b4 M BlockClosure>reset 2037437104: a(n) BlockClosure 0xbfc925cc M Zipper>next: 2037436996: a(n) Zipper 0xbfc925f4 M ZipperTest>testEnumerationWorksOverTrees 2035691720: a(n) ZipperTest 0xbfc9260c M ZipperTest(TestCase)>performTest 2035691720: a(n) ZipperTest 0xbfc92624 M [] in ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfc92640 M BlockClosure>on:do: 2037411540: a(n) BlockClosure 0xbfc92668 M [] in ZipperTest(TestCase)>timeout:after: 2035691720: a(n) ZipperTest 0xbfc92688 M BlockClosure>ensure: 2037412856: a(n) BlockClosure 0xbfc926b0 M ZipperTest(TestCase)>timeout:after: 2035691720: a(n) ZipperTest 0xbfc926d0 M [] in ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfcd0508 M BlockClosure>ensure: 2037409660: a(n) BlockClosure 0xbfcd0524 M ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfcd0540 M [] in TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd055c M BlockClosure>on:do: 2037409516: a(n) BlockClosure 0xbfcd0584 M [] in TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd05a0 M BlockClosure>on:do: 2037409368: a(n) BlockClosure 0xbfcd05c4 M TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd05e0 M ZipperTest(TestCase)>run: 2035691720: a(n) ZipperTest 0xbfcd05fc M TestRunner>runTest: 2034780632: a(n) TestRunner 0xbfcd0620 I [] in TestRunner>runSuite: 2034780632: a(n) TestRunner 0xbfcd0658 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfcd0678 M OrderedCollection>do: 2035691588: a(n) OrderedCollection 0xbfcd06a8 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfcd06d0 M [] in MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd504 M BlockClosure>on:do: 2035694312: a(n) BlockClosure 0xbfccd530 M [] in MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd550 M BlockClosure>ensure: 2035694164: a(n) BlockClosure 0xbfccd574 M MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd5a0 M ProgressInitiationException>defaultResumeValue 2035693376: a(n) ProgressInitiationException 0xbfccd5bc M ProgressInitiationException(Exception)>resume 2035693376: a(n) ProgressInitiationException 0xbfccd5d4 M ProgressInitiationException>defaultAction 2035693376: a(n) ProgressInitiationException 0xbfccd5f0 M UndefinedObject>handleSignal: 2004824068: a(n) UndefinedObject 0xbfccd610 M MethodContext(ContextPart)>handleSignal: 2035693708: a(n) MethodContext 0xbfccd62c M ProgressInitiationException(Exception)>signal 2035693376: a(n) ProgressInitiationException 0xbfccd644 M ProgressInitiationException>display:at:from:to:during: 2035693376: a(n) ProgressInitiationException 0xbfccd670 M ProgressInitiationException class>display:at:from:to:during: 2015244060: a(n) ProgressInitiationException class 0xbfccd69c M ByteString(String)>displayProgressAt:from:to:during: 2015249596: a(n) ByteString 0xbfccd6c4 M ByteString(String)>displayProgressFrom:to:during: 2015249596: a(n) ByteString 0xbfccc5d0 M OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfccc608 I [] in TestRunner>basicRunSuite:do: 2034780632: a(n) TestRunner 0xbfccc628 M BlockClosure>ensure: 2035693036: a(n) BlockClosure 0xbfccc64c I TestRunner>basicRunSuite:do: 2034780632: a(n) TestRunner 0xbfccc674 I TestRunner>runSuite: 2034780632: a(n) TestRunner 0xbfccc690 M TestRunner>runAll 2034780632: a(n) TestRunner 0xbfccc6b0 I PluggableButtonMorphPlus(PluggableButtonMorph)>performAction 2034847192: a(n) PluggableButtonMorphPlus 0xbfccc6d0 I PluggableButtonMorphPlus>performAction 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf534 M [] in PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf558 M Array(SequenceableCollection)>do: 2035687788: a(n) Array 0xbfccf574 M PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf598 I PluggableButtonMorphPlus>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf5b4 M PluggableButtonMorphPlus(Morph)>handleMouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf5d0 M MouseButtonEvent>sentTo: 2035688712: a(n) MouseButtonEvent 0xbfccf5ec M PluggableButtonMorphPlus(Morph)>handleEvent: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf608 M PluggableButtonMorphPlus(Morph)>handleFocusEvent: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf630 M [] in HandMorph>sendFocusEvent:to:clear: 2007171128: a(n) HandMorph 0xbfccf64c M BlockClosure>on:do: 2035688464: a(n) BlockClosure 0xbfccf678 M PasteUpMorph>becomeActiveDuring: 2013415124: a(n) PasteUpMorph 0xbfccf69c M HandMorph>sendFocusEvent:to:clear: 2007171128: a(n) HandMorph 0xbfccf6c4 M HandMorph>sendEvent:focus:clear: 2007171128: a(n) HandMorph 0xbfc755b4 M HandMorph>sendMouseEvent: 2007171128: a(n) HandMorph 0xbfc755d8 M HandMorph>handleEvent: 2007171128: a(n) HandMorph 0xbfc75604 M HandMorph>processEvents 2007171128: a(n) HandMorph 0xbfc75620 M [] in WorldState>doOneCycleNowFor: 2004979600: a(n) WorldState 0xbfc75644 M Array(SequenceableCollection)>do: 2004895736: a(n) Array 0xbfc75660 M WorldState>handsDo: 2004979600: a(n) WorldState 0xbfc75680 M WorldState>doOneCycleNowFor: 2004979600: a(n) WorldState 0xbfc7569c M WorldState>doOneCycleFor: 2004979600: a(n) WorldState 0xbfc756b8 M PasteUpMorph>doOneCycle 2013415124: a(n) PasteUpMorph 0xbfc756d0 M [] in Project class>spawnNewProcess 2012564228: a(n) Project class 0x79075924 s [] in BlockClosure>newProcess
Most recent primitives basicNew basicNew basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy
stack page bytes 4096 available headroom 3300 minimum unused headroom 3504
(last object overwritten)
On 27 February 2013 15:30, Igor Stasenko siguctua@gmail.com wrote:
On 27 February 2013 15:51, Frank Shearar frank.shearar@gmail.com wrote:
So I thought I'd be extra tricky with some partial continuation stuff and, as sometimes happens, things went Badly Wrong and the VM crashed. What was odd was that it said "last object overwritten", which I've not seen before.
Good news though: I have an image that will trigger the bug in a reproducible fashion! Since it's a 14M tarball, maybe I should mail it to Eliot separately... (but if anyone else wants a look I'm happy to supply a copy).
frank
mimimi.. (send it to me too, please ;)
Check your inbox :)
frank
On 27 February 2013 15:35, Frank Shearar frank.shearar@gmail.com wrote:
On 27 February 2013 15:30, Igor Stasenko siguctua@gmail.com wrote:
On 27 February 2013 15:51, Frank Shearar frank.shearar@gmail.com wrote:
So I thought I'd be extra tricky with some partial continuation stuff and, as sometimes happens, things went Badly Wrong and the VM crashed. What was odd was that it said "last object overwritten", which I've not seen before.
Good news though: I have an image that will trigger the bug in a reproducible fashion! Since it's a 14M tarball, maybe I should mail it to Eliot separately... (but if anyone else wants a look I'm happy to supply a copy).
frank
mimimi.. (send it to me too, please ;)
Check your inbox :)
Oh, I should add, just for sanity's sake, that this particular test used to work: it did when I wrote this: http://www.lshift.net/blog/2011/06/30/the-other-kind-of-zipper
frank
Hi Frank,
On Wed, Feb 27, 2013 at 6:51 AM, Frank Shearar frank.shearar@gmail.comwrote:
So I thought I'd be extra tricky with some partial continuation stuff and, as sometimes happens, things went Badly Wrong and the VM crashed. What was odd was that it said "last object overwritten", which I've not seen before.
this means what it says and is pointing to e.g. a bug in an FFI call. Cog fills the object eden zone with a bit pattern and checks on every allocation that the word pointed to by the allocation pointer contains the correct bit pattern. If the last object allocated is written-to past its end this will corrupt the bit pattern in the allocation zone and the next allocation will exit with an error. Such overwriting happens e.g. when one supplies a buffer that is too short to external code that writes to the buffer.
So if you're making FFI calls perhaps you can debug this yourself.
If you're not then, yes, please send me the tarball in email.
cheers.
Good news though: I have an image that will trigger the bug in a reproducible fashion! Since it's a 14M tarball, maybe I should mail it to Eliot separately... (but if anyone else wants a look I'm happy to supply a copy).
frank
Stack trace:
last object overwritten
Squeak VM version: 4.0-2678 #1 Wed Feb 6 11:36:48 PST 2013 gcc 4.1.2 Built from: CoInterpreter VMMaker.oscog-eem.264 uuid: 64e76092-8af7-449f-9188-e65f3bd1f08d Feb 6 2013 With: StackToRegisterMappingCogit VMMaker.oscog-eem.264 uuid: 64e76092-8af7-449f-9188-e65f3bd1f08d Feb 6 2013 Revision: VM: r2678 http://www.squeakvm.org/svn/squeak/branches/Cog Plugins: r2545 http://squeakvm.org/svn/squeak/trunk/platforms/Cross/plugins Build host: Linux mcqfes 2.6.18-128.el5 #1 SMP Wed Jan 21 10:44:23 EST 2009 i686 i686 i386 GNU/Linux plugin path: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678 [default: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/lib/squeak/4.0-2678/]
C stack backtrace:
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x805cb71]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(error+0x19)[0x805ce59]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x8069bb3]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x80789ff] [0x77709183]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(interpret+0x1eb)[0x807f23b]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(main+0x397)[0x805d237] /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xbb1bd6]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x805ac41]
Smalltalk stack dump: 0xbfc80668 M MethodContext(Object)>copy 2037438000: a(n) MethodContext 0xbfc80684 M MethodContext(ContextPart)>copyTo: 2037438000: a(n) MethodContext 0xbfc806a8 M MethodContext(ContextPart)>copyTo: 2037437956: a(n) MethodContext 0xbfc806cc M MethodContext(ContextPart)>copyTo: 2037437880: a(n) MethodContext 0xbfc87548 M MethodContext(ContextPart)>copyTo: 2037440340: a(n) MethodContext 0xbfc8756c M MethodContext(ContextPart)>copyTo: 2037440248: a(n) MethodContext 0xbfc87590 M MethodContext(ContextPart)>copyTo: 2037439048: a(n) MethodContext 0xbfc875b4 M MethodContext(ContextPart)>copyTo: 2037440156: a(n) MethodContext 0xbfc875d0 M PartialContinuation>from:downTo: 2037440528: a(n) PartialContinuation 0xbfc875f0 M PartialContinuation class>from:downTo: 2032752868: a(n) PartialContinuation class 0xbfc87620 M BlockClosure>shift: 2037439144: a(n) BlockClosure 0xbfc8763c M BlockClosure>shift 2037439144: a(n) BlockClosure 0xbfc87654 M [] in Zipper class>zipOver: 2033885808: a(n) Zipper class 0xbfc87674 M [] in Zipper class>zipOver: 2033885808: a(n) Zipper class 0xbfc8769c M TestTree>collect: 2037413184: a(n) TestTree 0xbfc876cc I TestTree>collect: 2037413204: a(n) TestTree 0x7970d604 s TestTree>collect: 0x7970d630 s [] in Zipper class>zipOver: 0x7970d65c s [] in PartialContinuation>compose: 0x7970d690 s [] in Zipper>next: 0x7970d6c4 s [] in PartialContinuation>compose: 0x7970d700 s [] in Zipper>next: 0x7970d73c s [] in PartialContinuation>compose: 0x7970d780 s [] in Zipper>next: 0x7970d87c s [] in PartialContinuation>compose: 0x7970d8c8 s [] in Zipper>next: 0x7970d914 s [] in PartialContinuation>compose: 0x7970d968 s [] in Zipper>next: 0xbfc92558 M [] in PartialContinuation>compose: 2037435320: a(n) PartialContinuation 0xbfc92578 M [] in Zipper>next: 2037436996: a(n) Zipper 0xbfc92594 M BlockClosure>on:do: 2037437104: a(n) BlockClosure 0xbfc925b4 M BlockClosure>reset 2037437104: a(n) BlockClosure 0xbfc925cc M Zipper>next: 2037436996: a(n) Zipper 0xbfc925f4 M ZipperTest>testEnumerationWorksOverTrees 2035691720: a(n) ZipperTest 0xbfc9260c M ZipperTest(TestCase)>performTest 2035691720: a(n) ZipperTest 0xbfc92624 M [] in ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfc92640 M BlockClosure>on:do: 2037411540: a(n) BlockClosure 0xbfc92668 M [] in ZipperTest(TestCase)>timeout:after: 2035691720: a(n) ZipperTest 0xbfc92688 M BlockClosure>ensure: 2037412856: a(n) BlockClosure 0xbfc926b0 M ZipperTest(TestCase)>timeout:after: 2035691720: a(n) ZipperTest 0xbfc926d0 M [] in ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfcd0508 M BlockClosure>ensure: 2037409660: a(n) BlockClosure 0xbfcd0524 M ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfcd0540 M [] in TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd055c M BlockClosure>on:do: 2037409516: a(n) BlockClosure 0xbfcd0584 M [] in TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd05a0 M BlockClosure>on:do: 2037409368: a(n) BlockClosure 0xbfcd05c4 M TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd05e0 M ZipperTest(TestCase)>run: 2035691720: a(n) ZipperTest 0xbfcd05fc M TestRunner>runTest: 2034780632: a(n) TestRunner 0xbfcd0620 I [] in TestRunner>runSuite: 2034780632: a(n) TestRunner 0xbfcd0658 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfcd0678 M OrderedCollection>do: 2035691588: a(n) OrderedCollection 0xbfcd06a8 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfcd06d0 M [] in MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd504 M BlockClosure>on:do: 2035694312: a(n) BlockClosure 0xbfccd530 M [] in MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd550 M BlockClosure>ensure: 2035694164: a(n) BlockClosure 0xbfccd574 M MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd5a0 M ProgressInitiationException>defaultResumeValue 2035693376: a(n) ProgressInitiationException 0xbfccd5bc M ProgressInitiationException(Exception)>resume 2035693376: a(n) ProgressInitiationException 0xbfccd5d4 M ProgressInitiationException>defaultAction 2035693376: a(n) ProgressInitiationException 0xbfccd5f0 M UndefinedObject>handleSignal: 2004824068: a(n) UndefinedObject 0xbfccd610 M MethodContext(ContextPart)>handleSignal: 2035693708: a(n) MethodContext 0xbfccd62c M ProgressInitiationException(Exception)>signal 2035693376: a(n) ProgressInitiationException 0xbfccd644 M ProgressInitiationException>display:at:from:to:during: 2035693376: a(n) ProgressInitiationException 0xbfccd670 M ProgressInitiationException class>display:at:from:to:during: 2015244060: a(n) ProgressInitiationException class 0xbfccd69c M ByteString(String)>displayProgressAt:from:to:during: 2015249596: a(n) ByteString 0xbfccd6c4 M ByteString(String)>displayProgressFrom:to:during: 2015249596: a(n) ByteString 0xbfccc5d0 M OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfccc608 I [] in TestRunner>basicRunSuite:do: 2034780632: a(n) TestRunner 0xbfccc628 M BlockClosure>ensure: 2035693036: a(n) BlockClosure 0xbfccc64c I TestRunner>basicRunSuite:do: 2034780632: a(n) TestRunner 0xbfccc674 I TestRunner>runSuite: 2034780632: a(n) TestRunner 0xbfccc690 M TestRunner>runAll 2034780632: a(n) TestRunner 0xbfccc6b0 I PluggableButtonMorphPlus(PluggableButtonMorph)>performAction 2034847192: a(n) PluggableButtonMorphPlus 0xbfccc6d0 I PluggableButtonMorphPlus>performAction 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf534 M [] in PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf558 M Array(SequenceableCollection)>do: 2035687788: a(n) Array 0xbfccf574 M PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf598 I PluggableButtonMorphPlus>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf5b4 M PluggableButtonMorphPlus(Morph)>handleMouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf5d0 M MouseButtonEvent>sentTo: 2035688712: a(n) MouseButtonEvent 0xbfccf5ec M PluggableButtonMorphPlus(Morph)>handleEvent: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf608 M PluggableButtonMorphPlus(Morph)>handleFocusEvent: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf630 M [] in HandMorph>sendFocusEvent:to:clear: 2007171128: a(n) HandMorph 0xbfccf64c M BlockClosure>on:do: 2035688464: a(n) BlockClosure 0xbfccf678 M PasteUpMorph>becomeActiveDuring: 2013415124: a(n) PasteUpMorph 0xbfccf69c M HandMorph>sendFocusEvent:to:clear: 2007171128: a(n) HandMorph 0xbfccf6c4 M HandMorph>sendEvent:focus:clear: 2007171128: a(n) HandMorph 0xbfc755b4 M HandMorph>sendMouseEvent: 2007171128: a(n) HandMorph 0xbfc755d8 M HandMorph>handleEvent: 2007171128: a(n) HandMorph 0xbfc75604 M HandMorph>processEvents 2007171128: a(n) HandMorph 0xbfc75620 M [] in WorldState>doOneCycleNowFor: 2004979600: a(n) WorldState 0xbfc75644 M Array(SequenceableCollection)>do: 2004895736: a(n) Array 0xbfc75660 M WorldState>handsDo: 2004979600: a(n) WorldState 0xbfc75680 M WorldState>doOneCycleNowFor: 2004979600: a(n) WorldState 0xbfc7569c M WorldState>doOneCycleFor: 2004979600: a(n) WorldState 0xbfc756b8 M PasteUpMorph>doOneCycle 2013415124: a(n) PasteUpMorph 0xbfc756d0 M [] in Project class>spawnNewProcess 2012564228: a(n) Project class 0x79075924 s [] in BlockClosure>newProcess
Most recent primitives basicNew basicNew basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy
stack page bytes 4096 available headroom 3300 minimum unused headroom 3504
(last object overwritten)
On 27 February 2013 18:15, Eliot Miranda eliot.miranda@gmail.com wrote:
Hi Frank,
On Wed, Feb 27, 2013 at 6:51 AM, Frank Shearar frank.shearar@gmail.com wrote:
So I thought I'd be extra tricky with some partial continuation stuff and, as sometimes happens, things went Badly Wrong and the VM crashed. What was odd was that it said "last object overwritten", which I've not seen before.
this means what it says and is pointing to e.g. a bug in an FFI call. Cog fills the object eden zone with a bit pattern and checks on every allocation that the word pointed to by the allocation pointer contains the correct bit pattern. If the last object allocated is written-to past its end this will corrupt the bit pattern in the allocation zone and the next allocation will exit with an error. Such overwriting happens e.g. when one supplies a buffer that is too short to external code that writes to the buffer.
So if you're making FFI calls perhaps you can debug this yourself.
That just makes things stranger, because I'm not using FFI. Other than the fact that I'm stack-hacking, there's nothing other than normal Smalltalk stuff going on.
If you're not then, yes, please send me the tarball in email.
Good, because I did that already :)
frank
cheers.
Good news though: I have an image that will trigger the bug in a reproducible fashion! Since it's a 14M tarball, maybe I should mail it to Eliot separately... (but if anyone else wants a look I'm happy to supply a copy).
frank
Stack trace:
last object overwritten
Squeak VM version: 4.0-2678 #1 Wed Feb 6 11:36:48 PST 2013 gcc 4.1.2 Built from: CoInterpreter VMMaker.oscog-eem.264 uuid: 64e76092-8af7-449f-9188-e65f3bd1f08d Feb 6 2013 With: StackToRegisterMappingCogit VMMaker.oscog-eem.264 uuid: 64e76092-8af7-449f-9188-e65f3bd1f08d Feb 6 2013 Revision: VM: r2678 http://www.squeakvm.org/svn/squeak/branches/Cog Plugins: r2545 http://squeakvm.org/svn/squeak/trunk/platforms/Cross/plugins Build host: Linux mcqfes 2.6.18-128.el5 #1 SMP Wed Jan 21 10:44:23 EST 2009 i686 i686 i386 GNU/Linux plugin path: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678 [default: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/lib/squeak/4.0-2678/]
C stack backtrace: /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x805cb71] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(error+0x19)[0x805ce59] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x8069bb3] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x80789ff] [0x77709183] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(interpret+0x1eb)[0x807f23b] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(main+0x397)[0x805d237] /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xbb1bd6] /home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x805ac41]
Smalltalk stack dump: 0xbfc80668 M MethodContext(Object)>copy 2037438000: a(n) MethodContext 0xbfc80684 M MethodContext(ContextPart)>copyTo: 2037438000: a(n) MethodContext 0xbfc806a8 M MethodContext(ContextPart)>copyTo: 2037437956: a(n) MethodContext 0xbfc806cc M MethodContext(ContextPart)>copyTo: 2037437880: a(n) MethodContext 0xbfc87548 M MethodContext(ContextPart)>copyTo: 2037440340: a(n) MethodContext 0xbfc8756c M MethodContext(ContextPart)>copyTo: 2037440248: a(n) MethodContext 0xbfc87590 M MethodContext(ContextPart)>copyTo: 2037439048: a(n) MethodContext 0xbfc875b4 M MethodContext(ContextPart)>copyTo: 2037440156: a(n) MethodContext 0xbfc875d0 M PartialContinuation>from:downTo: 2037440528: a(n) PartialContinuation 0xbfc875f0 M PartialContinuation class>from:downTo: 2032752868: a(n) PartialContinuation class 0xbfc87620 M BlockClosure>shift: 2037439144: a(n) BlockClosure 0xbfc8763c M BlockClosure>shift 2037439144: a(n) BlockClosure 0xbfc87654 M [] in Zipper class>zipOver: 2033885808: a(n) Zipper class 0xbfc87674 M [] in Zipper class>zipOver: 2033885808: a(n) Zipper class 0xbfc8769c M TestTree>collect: 2037413184: a(n) TestTree 0xbfc876cc I TestTree>collect: 2037413204: a(n) TestTree 0x7970d604 s TestTree>collect: 0x7970d630 s [] in Zipper class>zipOver: 0x7970d65c s [] in PartialContinuation>compose: 0x7970d690 s [] in Zipper>next: 0x7970d6c4 s [] in PartialContinuation>compose: 0x7970d700 s [] in Zipper>next: 0x7970d73c s [] in PartialContinuation>compose: 0x7970d780 s [] in Zipper>next: 0x7970d87c s [] in PartialContinuation>compose: 0x7970d8c8 s [] in Zipper>next: 0x7970d914 s [] in PartialContinuation>compose: 0x7970d968 s [] in Zipper>next: 0xbfc92558 M [] in PartialContinuation>compose: 2037435320: a(n) PartialContinuation 0xbfc92578 M [] in Zipper>next: 2037436996: a(n) Zipper 0xbfc92594 M BlockClosure>on:do: 2037437104: a(n) BlockClosure 0xbfc925b4 M BlockClosure>reset 2037437104: a(n) BlockClosure 0xbfc925cc M Zipper>next: 2037436996: a(n) Zipper 0xbfc925f4 M ZipperTest>testEnumerationWorksOverTrees 2035691720: a(n) ZipperTest 0xbfc9260c M ZipperTest(TestCase)>performTest 2035691720: a(n) ZipperTest 0xbfc92624 M [] in ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfc92640 M BlockClosure>on:do: 2037411540: a(n) BlockClosure 0xbfc92668 M [] in ZipperTest(TestCase)>timeout:after: 2035691720: a(n) ZipperTest 0xbfc92688 M BlockClosure>ensure: 2037412856: a(n) BlockClosure 0xbfc926b0 M ZipperTest(TestCase)>timeout:after: 2035691720: a(n) ZipperTest 0xbfc926d0 M [] in ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfcd0508 M BlockClosure>ensure: 2037409660: a(n) BlockClosure 0xbfcd0524 M ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfcd0540 M [] in TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd055c M BlockClosure>on:do: 2037409516: a(n) BlockClosure 0xbfcd0584 M [] in TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd05a0 M BlockClosure>on:do: 2037409368: a(n) BlockClosure 0xbfcd05c4 M TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd05e0 M ZipperTest(TestCase)>run: 2035691720: a(n) ZipperTest 0xbfcd05fc M TestRunner>runTest: 2034780632: a(n) TestRunner 0xbfcd0620 I [] in TestRunner>runSuite: 2034780632: a(n) TestRunner 0xbfcd0658 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfcd0678 M OrderedCollection>do: 2035691588: a(n) OrderedCollection 0xbfcd06a8 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfcd06d0 M [] in MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd504 M BlockClosure>on:do: 2035694312: a(n) BlockClosure 0xbfccd530 M [] in MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd550 M BlockClosure>ensure: 2035694164: a(n) BlockClosure 0xbfccd574 M MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd5a0 M ProgressInitiationException>defaultResumeValue 2035693376: a(n) ProgressInitiationException 0xbfccd5bc M ProgressInitiationException(Exception)>resume 2035693376: a(n) ProgressInitiationException 0xbfccd5d4 M ProgressInitiationException>defaultAction 2035693376: a(n) ProgressInitiationException 0xbfccd5f0 M UndefinedObject>handleSignal: 2004824068: a(n) UndefinedObject 0xbfccd610 M MethodContext(ContextPart)>handleSignal: 2035693708: a(n) MethodContext 0xbfccd62c M ProgressInitiationException(Exception)>signal 2035693376: a(n) ProgressInitiationException 0xbfccd644 M ProgressInitiationException>display:at:from:to:during: 2035693376: a(n) ProgressInitiationException 0xbfccd670 M ProgressInitiationException class>display:at:from:to:during: 2015244060: a(n) ProgressInitiationException class 0xbfccd69c M ByteString(String)>displayProgressAt:from:to:during: 2015249596: a(n) ByteString 0xbfccd6c4 M ByteString(String)>displayProgressFrom:to:during: 2015249596: a(n) ByteString 0xbfccc5d0 M OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfccc608 I [] in TestRunner>basicRunSuite:do: 2034780632: a(n) TestRunner 0xbfccc628 M BlockClosure>ensure: 2035693036: a(n) BlockClosure 0xbfccc64c I TestRunner>basicRunSuite:do: 2034780632: a(n) TestRunner 0xbfccc674 I TestRunner>runSuite: 2034780632: a(n) TestRunner 0xbfccc690 M TestRunner>runAll 2034780632: a(n) TestRunner 0xbfccc6b0 I PluggableButtonMorphPlus(PluggableButtonMorph)>performAction 2034847192: a(n) PluggableButtonMorphPlus 0xbfccc6d0 I PluggableButtonMorphPlus>performAction 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf534 M [] in PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf558 M Array(SequenceableCollection)>do: 2035687788: a(n) Array 0xbfccf574 M PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf598 I PluggableButtonMorphPlus>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf5b4 M PluggableButtonMorphPlus(Morph)>handleMouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf5d0 M MouseButtonEvent>sentTo: 2035688712: a(n) MouseButtonEvent 0xbfccf5ec M PluggableButtonMorphPlus(Morph)>handleEvent: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf608 M PluggableButtonMorphPlus(Morph)>handleFocusEvent: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf630 M [] in HandMorph>sendFocusEvent:to:clear: 2007171128: a(n) HandMorph 0xbfccf64c M BlockClosure>on:do: 2035688464: a(n) BlockClosure 0xbfccf678 M PasteUpMorph>becomeActiveDuring: 2013415124: a(n) PasteUpMorph 0xbfccf69c M HandMorph>sendFocusEvent:to:clear: 2007171128: a(n) HandMorph 0xbfccf6c4 M HandMorph>sendEvent:focus:clear: 2007171128: a(n) HandMorph 0xbfc755b4 M HandMorph>sendMouseEvent: 2007171128: a(n) HandMorph 0xbfc755d8 M HandMorph>handleEvent: 2007171128: a(n) HandMorph 0xbfc75604 M HandMorph>processEvents 2007171128: a(n) HandMorph 0xbfc75620 M [] in WorldState>doOneCycleNowFor: 2004979600: a(n) WorldState 0xbfc75644 M Array(SequenceableCollection)>do: 2004895736: a(n) Array 0xbfc75660 M WorldState>handsDo: 2004979600: a(n) WorldState 0xbfc75680 M WorldState>doOneCycleNowFor: 2004979600: a(n) WorldState 0xbfc7569c M WorldState>doOneCycleFor: 2004979600: a(n) WorldState 0xbfc756b8 M PasteUpMorph>doOneCycle 2013415124: a(n) PasteUpMorph 0xbfc756d0 M [] in Project class>spawnNewProcess 2012564228: a(n) Project class 0x79075924 s [] in BlockClosure>newProcess
Most recent primitives basicNew basicNew basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy
stack page bytes 4096 available headroom 3300 minimum unused headroom 3504
(last object overwritten)-- best, Eliot
On Wed, Feb 27, 2013 at 10:23 AM, Frank Shearar frank.shearar@gmail.comwrote:
On 27 February 2013 18:15, Eliot Miranda eliot.miranda@gmail.com wrote:
Hi Frank,
On Wed, Feb 27, 2013 at 6:51 AM, Frank Shearar frank.shearar@gmail.com
wrote:
So I thought I'd be extra tricky with some partial continuation stuff and, as sometimes happens, things went Badly Wrong and the VM crashed. What was odd was that it said "last object overwritten", which I've not seen before.
this means what it says and is pointing to e.g. a bug in an FFI call.
Cog fills the object eden zone with a bit pattern and checks on every allocation that the word pointed to by the allocation pointer contains the correct bit pattern. If the last object allocated is written-to past its end this will corrupt the bit pattern in the allocation zone and the next allocation will exit with an error. Such overwriting happens e.g. when one supplies a buffer that is too short to external code that writes to the buffer.
So if you're making FFI calls perhaps you can debug this yourself.
That just makes things stranger, because I'm not using FFI. Other than the fact that I'm stack-hacking, there's nothing other than normal Smalltalk stuff going on.
Indeed. There's a bug in primitive shallowCopy of contexts that makes the copy a word too short. Do that a few times and ... bang. Should have a fix soon. Amazing this stuff ever works at all ;)
If you're not then, yes, please send me the tarball in email.
Good, because I did that already :)
frank
cheers.
Good news though: I have an image that will trigger the bug in a reproducible fashion! Since it's a 14M tarball, maybe I should mail it to Eliot separately... (but if anyone else wants a look I'm happy to supply a copy).
frank
Stack trace:
last object overwritten
Squeak VM version: 4.0-2678 #1 Wed Feb 6 11:36:48 PST 2013 gcc 4.1.2 Built from: CoInterpreter VMMaker.oscog-eem.264 uuid: 64e76092-8af7-449f-9188-e65f3bd1f08d Feb 6 2013 With: StackToRegisterMappingCogit VMMaker.oscog-eem.264 uuid: 64e76092-8af7-449f-9188-e65f3bd1f08d Feb 6 2013 Revision: VM: r2678 http://www.squeakvm.org/svn/squeak/branches/Cog Plugins: r2545
http://squeakvm.org/svn/squeak/trunk/platforms/Cross/plugins
Build host: Linux mcqfes 2.6.18-128.el5 #1 SMP Wed Jan 21 10:44:23 EST 2009 i686 i686 i386 GNU/Linux plugin path:
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678
[default:
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/lib/squeak/4.0-2678/]
C stack backtrace:
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x805cb71]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(error+0x19)[0x805ce59]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x8069bb3]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x80789ff]
[0x77709183]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(interpret+0x1eb)[0x807f23b]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak(main+0x397)[0x805d237]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xbb1bd6]
/home/frank/Documents/squeak-ci/target/cog.r2678/coglinux/bin/../lib/squeak/4.0-2678/squeak[0x805ac41]
Smalltalk stack dump: 0xbfc80668 M MethodContext(Object)>copy 2037438000: a(n) MethodContext 0xbfc80684 M MethodContext(ContextPart)>copyTo: 2037438000: a(n)
MethodContext
0xbfc806a8 M MethodContext(ContextPart)>copyTo: 2037437956: a(n)
MethodContext
0xbfc806cc M MethodContext(ContextPart)>copyTo: 2037437880: a(n)
MethodContext
0xbfc87548 M MethodContext(ContextPart)>copyTo: 2037440340: a(n)
MethodContext
0xbfc8756c M MethodContext(ContextPart)>copyTo: 2037440248: a(n)
MethodContext
0xbfc87590 M MethodContext(ContextPart)>copyTo: 2037439048: a(n)
MethodContext
0xbfc875b4 M MethodContext(ContextPart)>copyTo: 2037440156: a(n)
MethodContext
0xbfc875d0 M PartialContinuation>from:downTo: 2037440528: a(n) PartialContinuation 0xbfc875f0 M PartialContinuation class>from:downTo: 2032752868: a(n) PartialContinuation class 0xbfc87620 M BlockClosure>shift: 2037439144: a(n) BlockClosure 0xbfc8763c M BlockClosure>shift 2037439144: a(n) BlockClosure 0xbfc87654 M [] in Zipper class>zipOver: 2033885808: a(n) Zipper class 0xbfc87674 M [] in Zipper class>zipOver: 2033885808: a(n) Zipper class 0xbfc8769c M TestTree>collect: 2037413184: a(n) TestTree 0xbfc876cc I TestTree>collect: 2037413204: a(n) TestTree 0x7970d604 s TestTree>collect: 0x7970d630 s [] in Zipper class>zipOver: 0x7970d65c s [] in PartialContinuation>compose: 0x7970d690 s [] in Zipper>next: 0x7970d6c4 s [] in PartialContinuation>compose: 0x7970d700 s [] in Zipper>next: 0x7970d73c s [] in PartialContinuation>compose: 0x7970d780 s [] in Zipper>next: 0x7970d87c s [] in PartialContinuation>compose: 0x7970d8c8 s [] in Zipper>next: 0x7970d914 s [] in PartialContinuation>compose: 0x7970d968 s [] in Zipper>next: 0xbfc92558 M [] in PartialContinuation>compose: 2037435320: a(n) PartialContinuation 0xbfc92578 M [] in Zipper>next: 2037436996: a(n) Zipper 0xbfc92594 M BlockClosure>on:do: 2037437104: a(n) BlockClosure 0xbfc925b4 M BlockClosure>reset 2037437104: a(n) BlockClosure 0xbfc925cc M Zipper>next: 2037436996: a(n) Zipper 0xbfc925f4 M ZipperTest>testEnumerationWorksOverTrees 2035691720: a(n) ZipperTest 0xbfc9260c M ZipperTest(TestCase)>performTest 2035691720: a(n)
ZipperTest
0xbfc92624 M [] in ZipperTest(TestCase)>runCase 2035691720: a(n)
ZipperTest
0xbfc92640 M BlockClosure>on:do: 2037411540: a(n) BlockClosure 0xbfc92668 M [] in ZipperTest(TestCase)>timeout:after: 2035691720: a(n) ZipperTest 0xbfc92688 M BlockClosure>ensure: 2037412856: a(n) BlockClosure 0xbfc926b0 M ZipperTest(TestCase)>timeout:after: 2035691720: a(n)
ZipperTest
0xbfc926d0 M [] in ZipperTest(TestCase)>runCase 2035691720: a(n)
ZipperTest
0xbfcd0508 M BlockClosure>ensure: 2037409660: a(n) BlockClosure 0xbfcd0524 M ZipperTest(TestCase)>runCase 2035691720: a(n) ZipperTest 0xbfcd0540 M [] in TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd055c M BlockClosure>on:do: 2037409516: a(n) BlockClosure 0xbfcd0584 M [] in TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd05a0 M BlockClosure>on:do: 2037409368: a(n) BlockClosure 0xbfcd05c4 M TestResult>runCase: 2035689052: a(n) TestResult 0xbfcd05e0 M ZipperTest(TestCase)>run: 2035691720: a(n) ZipperTest 0xbfcd05fc M TestRunner>runTest: 2034780632: a(n) TestRunner 0xbfcd0620 I [] in TestRunner>runSuite: 2034780632: a(n) TestRunner 0xbfcd0658 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfcd0678 M OrderedCollection>do: 2035691588: a(n) OrderedCollection 0xbfcd06a8 M [] in OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfcd06d0 M [] in MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd504 M BlockClosure>on:do: 2035694312: a(n) BlockClosure 0xbfccd530 M [] in MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd550 M BlockClosure>ensure: 2035694164: a(n) BlockClosure 0xbfccd574 M MorphicUIManager>displayProgress:at:from:to:during: 2015074224: a(n) MorphicUIManager 0xbfccd5a0 M ProgressInitiationException>defaultResumeValue 2035693376: a(n) ProgressInitiationException 0xbfccd5bc M ProgressInitiationException(Exception)>resume 2035693376: a(n) ProgressInitiationException 0xbfccd5d4 M ProgressInitiationException>defaultAction 2035693376: a(n) ProgressInitiationException 0xbfccd5f0 M UndefinedObject>handleSignal: 2004824068: a(n)
UndefinedObject
0xbfccd610 M MethodContext(ContextPart)>handleSignal: 2035693708: a(n) MethodContext 0xbfccd62c M ProgressInitiationException(Exception)>signal 2035693376: a(n) ProgressInitiationException 0xbfccd644 M ProgressInitiationException>display:at:from:to:during: 2035693376: a(n) ProgressInitiationException 0xbfccd670 M ProgressInitiationException class>display:at:from:to:during: 2015244060: a(n) ProgressInitiationException class 0xbfccd69c M ByteString(String)>displayProgressAt:from:to:during: 2015249596: a(n) ByteString 0xbfccd6c4 M ByteString(String)>displayProgressFrom:to:during: 2015249596: a(n) ByteString 0xbfccc5d0 M OrderedCollection(Collection)>do:displayingProgress:every: 2035691588: a(n) OrderedCollection 0xbfccc608 I [] in TestRunner>basicRunSuite:do: 2034780632: a(n)
TestRunner
0xbfccc628 M BlockClosure>ensure: 2035693036: a(n) BlockClosure 0xbfccc64c I TestRunner>basicRunSuite:do: 2034780632: a(n) TestRunner 0xbfccc674 I TestRunner>runSuite: 2034780632: a(n) TestRunner 0xbfccc690 M TestRunner>runAll 2034780632: a(n) TestRunner 0xbfccc6b0 I
PluggableButtonMorphPlus(PluggableButtonMorph)>performAction
2034847192: a(n) PluggableButtonMorphPlus 0xbfccc6d0 I PluggableButtonMorphPlus>performAction 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf534 M [] in PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf558 M Array(SequenceableCollection)>do: 2035687788: a(n) Array 0xbfccf574 M PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf598 I PluggableButtonMorphPlus>mouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf5b4 M PluggableButtonMorphPlus(Morph)>handleMouseUp: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf5d0 M MouseButtonEvent>sentTo: 2035688712: a(n) MouseButtonEvent 0xbfccf5ec M PluggableButtonMorphPlus(Morph)>handleEvent: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf608 M PluggableButtonMorphPlus(Morph)>handleFocusEvent: 2034847192: a(n) PluggableButtonMorphPlus 0xbfccf630 M [] in HandMorph>sendFocusEvent:to:clear: 2007171128: a(n)
HandMorph
0xbfccf64c M BlockClosure>on:do: 2035688464: a(n) BlockClosure 0xbfccf678 M PasteUpMorph>becomeActiveDuring: 2013415124: a(n)
PasteUpMorph
0xbfccf69c M HandMorph>sendFocusEvent:to:clear: 2007171128: a(n)
HandMorph
0xbfccf6c4 M HandMorph>sendEvent:focus:clear: 2007171128: a(n) HandMorph 0xbfc755b4 M HandMorph>sendMouseEvent: 2007171128: a(n) HandMorph 0xbfc755d8 M HandMorph>handleEvent: 2007171128: a(n) HandMorph 0xbfc75604 M HandMorph>processEvents 2007171128: a(n) HandMorph 0xbfc75620 M [] in WorldState>doOneCycleNowFor: 2004979600: a(n)
WorldState
0xbfc75644 M Array(SequenceableCollection)>do: 2004895736: a(n) Array 0xbfc75660 M WorldState>handsDo: 2004979600: a(n) WorldState 0xbfc75680 M WorldState>doOneCycleNowFor: 2004979600: a(n) WorldState 0xbfc7569c M WorldState>doOneCycleFor: 2004979600: a(n) WorldState 0xbfc756b8 M PasteUpMorph>doOneCycle 2013415124: a(n) PasteUpMorph 0xbfc756d0 M [] in Project class>spawnNewProcess 2012564228: a(n)
Project class
0x79075924 s [] in BlockClosure>newProcess
Most recent primitives basicNew basicNew basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy basicNew findNextHandlerContextStarting tempAt: tempAt: tempAt:put: tempAt: findNextUnwindContextUpTo: tempAt: tempAt:put: tempAt: terminateTo: tempAt:put: findNextUnwindContextUpTo: terminateTo: basicNew shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy shallowCopy
stack page bytes 4096 available headroom 3300 minimum unused headroom
3504
(last object overwritten)-- best, Eliot
On 28 February 2013 20:35, Eliot Miranda eliot.miranda@gmail.com wrote:
On Wed, Feb 27, 2013 at 10:23 AM, Frank Shearar frank.shearar@gmail.com wrote:
On 27 February 2013 18:15, Eliot Miranda eliot.miranda@gmail.com wrote:
Hi Frank,
On Wed, Feb 27, 2013 at 6:51 AM, Frank Shearar frank.shearar@gmail.com wrote:
So I thought I'd be extra tricky with some partial continuation stuff and, as sometimes happens, things went Badly Wrong and the VM crashed. What was odd was that it said "last object overwritten", which I've not seen before.
this means what it says and is pointing to e.g. a bug in an FFI call. Cog fills the object eden zone with a bit pattern and checks on every allocation that the word pointed to by the allocation pointer contains the correct bit pattern. If the last object allocated is written-to past its end this will corrupt the bit pattern in the allocation zone and the next allocation will exit with an error. Such overwriting happens e.g. when one supplies a buffer that is too short to external code that writes to the buffer.
So if you're making FFI calls perhaps you can debug this yourself.
That just makes things stranger, because I'm not using FFI. Other than the fact that I'm stack-hacking, there's nothing other than normal Smalltalk stuff going on.
Indeed. There's a bug in primitive shallowCopy of contexts that makes the copy a word too short. Do that a few times and ... bang. Should have a fix soon. Amazing this stuff ever works at all ;)
I'm perversely proud that my perverse code has now flushed out two context bugs! I should make little ascii art tokens, and claim Ace status for the Control package when I hit #5!
frank
vm-dev@lists.squeakfoundation.org
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Eliot Miranda -
Frank Shearar -
Igor Stasenko