[Vm-dev] squeak.cog.spur x64 macos & linux reproducible VM crash

[Nicolas Cellier]

MBP-de-Nicolas:nsboot nicolas$ lldb
/Users/nicolas/Smalltalk/OpenSmalltalk/opensmalltalk-vm/build.macos64x64/squeak.cog.spur/SqueakDebug.app/Contents/MacOS/Squeak

(lldb) target create
"/Users/nicolas/Smalltalk/OpenSmalltalk/opensmalltalk-vm/build.macos64x64/squeak.cog.spur/SqueakDebug.app/Contents/MacOS/Squeak"
Current executable set to
'/Users/nicolas/Smalltalk/OpenSmalltalk/opensmalltalk-vm/build.macos64x64/squeak.cog.spur/SqueakDebug.app/Contents/MacOS/Squeak'
(x86_64).
(lldb) run ../../image/trunk6-64.image
Process 76862 launched:
'/Users/nicolas/Smalltalk/OpenSmalltalk/opensmalltalk-vm/build.macos64x64/squeak.cog.spur/SqueakDebug.app/Contents/MacOS/Squeak'
(x86_64)

Process 76862 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS
(code=1, address=0x16a)
    frame #0: 0x0000000107c02436
->  0x107c02436: movq   (%rdi), %r9
    0x107c02439: andq   $0x3fffff, %r9            ; imm = 0x3FFFFF
    0x107c02440: cmpq   $0x22, %r9
    0x107c02444: jne    0x107c0244d
Target 0: (Squeak) stopped.
(lldb) print $rdi
(unsigned long) $0 = 362
(lldb) call printCallStack()
    0x7ffeefbd54c8 M WebUtils class>jsonDecode: 0x109098170: a(n) WebUtils
class
    0x7ffeefbd5500 M WebClientServerTest>decode: 0x107eb0c38: a(n)
WebClientServerTest
    0x7ffeefbd5548 M WebClientServerTest>testNumbers 0x107eb0c38: a(n)
WebClientServerTest
    0x7ffeefbd5578 M WebClientServerTest(TestCase)>performTest 0x107eb0c38:
a(n) WebClientServerTest
    0x7ffeefbd55a8 M [] in WebClientServerTest(TestCase)>runCase
0x107eb0c38: a(n) WebClientServerTest
    0x7ffeefbd55e0 M BlockClosure>on:do: 0x1081f30f8: a(n) BlockClosure
    0x7ffeefbd5630 M [] in WebClientServerTest(TestCase)>timeout:after:
0x107eb0c38: a(n) WebClientServerTest
    0x7ffeefbd5670 M BlockClosure>ensure: 0x1081f3a08: a(n) BlockClosure
    0x7ffeefbd56c0 M WebClientServerTest(TestCase)>timeout:after:
0x107eb0c38: a(n) WebClientServerTest
    0x7ffeefbd5700 M [] in WebClientServerTest(TestCase)>runCase
0x107eb0c38: a(n) WebClientServerTest
    0x7ffeefbd1f60 M BlockClosure>ensure: 0x1081efb68: a(n) BlockClosure
    0x7ffeefbd1f98 M WebClientServerTest(TestCase)>runCase 0x107eb0c38:
a(n) WebClientServerTest
    0x7ffeefbd1fd0 M [] in TestResult>runCase: 0x107e66628: a(n) TestResult
    0x7ffeefbd2008 M BlockClosure>on:do: 0x1081efa58: a(n) BlockClosure
    0x7ffeefbd2058 M [] in TestResult>runCase: 0x107e66628: a(n) TestResult
    0x7ffeefbd2090 M BlockClosure>on:do: 0x1081ef940: a(n) BlockClosure
    0x7ffeefbd20d8 M TestResult>runCase: 0x107e66628: a(n) TestResult
    0x7ffeefbd2110 M WebClientServerTest(TestCase)>run: 0x107eb0c38: a(n)
WebClientServerTest
    0x7ffeefbd2148 M TestRunner>runTest: 0x10c7e9c98: a(n) TestRunner
    0x7ffeefbd2180 M [] in TestRunner>runSuite: 0x10c7e9c98: a(n) TestRunner
    0x7ffeefbd21f0 M [] in
OrderedCollection(Collection)>do:displayingProgress:every: 0x107e689b8:
a(n) OrderedCollection
    0x7ffeefbd2230 M OrderedCollection>do: 0x107e689b8: a(n)
OrderedCollection
    0x7ffeefbd2290 M [] in
OrderedCollection(Collection)>do:displayingProgress:every: 0x107e689b8:
a(n) OrderedCollection
    0x7ffeefbd22e0 M [] in
MorphicUIManager>displayProgress:at:from:to:during: 0x109d48eb8: a(n)
MorphicUIManager
    0x7ffeefbd2318 M BlockClosure>on:do: 0x107e68bf0: a(n) BlockClosure
    0x7ffeefbd2370 M [] in
MorphicUIManager>displayProgress:at:from:to:during: 0x109d48eb8: a(n)
MorphicUIManager
    0x7ffeefbd23b0 M BlockClosure>ensure: 0x107e68dc0: a(n) BlockClosure
    0x7ffeefbd2408 I MorphicUIManager>displayProgress:at:from:to:during:
0x109d48eb8: a(n) MorphicUIManager
    0x7ffeefbd2470 I ProgressInitiationException>defaultResumeValue
0x107e68ed8: a(n) ProgressInitiationException
    0x7ffeefbd24b8 I ProgressInitiationException(Exception)>resume
0x107e68ed8: a(n) ProgressInitiationException
    0x7ffeefbd24f8 I ProgressInitiationException>defaultAction 0x107e68ed8:
a(n) ProgressInitiationException
    0x7ffeefbd2530 M UndefinedObject>handleSignal: 0x1085e78e0: a(n)
UndefinedObject
    0x7ffeefbd2578 I ProgressInitiationException(Exception)>signal
0x107e68ed8: a(n) ProgressInitiationException
    0x7ffeefbd25b8 I ProgressInitiationException>display:at:from:to:during:
0x107e68ed8: a(n) ProgressInitiationException
    0x7ffeefbd2620 I ProgressInitiationException
class>display:at:from:to:during: 0x108b34888: a(n)
ProgressInitiationException class
    0x7ffeefbd2688 I ByteString(String)>displayProgressAt:from:to:during:
0x108ed25d0: a(n) ByteString
    0x7ffeefbd26e8 I ByteString(String)>displayProgressFrom:to:during:
0x108ed25d0: a(n) ByteString
       0x107e69158 s
OrderedCollection(Collection)>do:displayingProgress:every:
       0x107e736a8 s [] in TestRunner>basicRunSuite:do:
       0x107eb01c0 s BlockClosure>ensure:
       0x107ebae20 s TestRunner>basicRunSuite:do:
       0x107e735f0 s TestRunner>runSuite:
       0x107eb00e8 s TestRunner>runAll
       0x107ebad38 s
PluggableButtonMorphPlus(PluggableButtonMorph)>performAction
       0x107ec0030 s PluggableButtonMorphPlus>performAction
       0x107ec5028 s [] in
PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp:
       0x107ec9e00 s Array(SequenceableCollection)>do:
       0x107ecb020 s PluggableButtonMorphPlus(PluggableButtonMorph)>mouseUp:
       0x107eccab0 s PluggableButtonMorphPlus(Morph)>handleMouseUp:
       0x107ecd4f0 s MouseButtonEvent>sentTo:
       0x107ece660 s PluggableButtonMorphPlus(Morph)>handleEvent:
       0x107ecee40 s PluggableButtonMorphPlus(Morph)>handleFocusEvent:
       0x107ed1838 s MorphicEventDispatcher>doHandlingForFocusEvent:with:
       0x107edbe30 s MorphicEventDispatcher>dispatchFocusEvent:with:
       0x107edc568 s
PluggableButtonMorphPlus(Morph)>processFocusEvent:using:
       0x107ededf8 s PluggableButtonMorphPlus(Morph)>processFocusEvent:
       0x107edf1f8 s [] in HandMorph>sendFocusEvent:to:clear:
       0x107edf458 s BlockClosure>ensure:
       0x107edf5f0 s MouseButtonEvent(MorphicEvent)>becomeActiveDuring:
       0x107edf6d0 s [] in HandMorph>sendFocusEvent:to:clear:
       0x107edf7a0 s BlockClosure>ensure:
       0x107edf8b0 s HandMorph>becomeActiveDuring:
       0x107edf990 s [] in HandMorph>sendFocusEvent:to:clear:
       0x107edfa48 s BlockClosure>ensure:
       0x107edfb38 s PasteUpMorph>becomeActiveDuring:
       0x107edfc18 s HandMorph>sendFocusEvent:to:clear:
       0x107edfcd0 s HandMorph>sendEvent:focus:clear:
       0x107edfda8 s HandMorph>sendMouseEvent:
       0x107edfe70 s HandMorph>handleEvent:
       0x107edff28 s HandMorph>processEvents
       0x107edffe0 s [] in WorldState>doOneCycleNowFor:
       0x107ee0098 s Array(SequenceableCollection)>do:
       0x107ee0188 s WorldState>handsDo:
       0x107ee0240 s WorldState>doOneCycleNowFor:
       0x107ee02f8 s WorldState>doOneCycleFor:
       0x107ee03b0 s PasteUpMorph>doOneCycle
       0x10a1bcb48 s [] in MorphicProject>spawnNewProcess
       0x10a1bc3e8 s [] in BlockClosure>newProcess
(lldb)

To trigger this, just start an updated trunk64 squeak image and run this:
WebClientServerTest suite run.

You might have to accept connections in macos dialog box at first run.

I always have $RDI register = 362, same in linux x64...

(gdb) print $rdi
$1 = 362
(gdb) x /4i $pc
=> 0x8803c33: mov    (%rdi),%r9
   0x8803c36: and    $0x3fffff,%r9
   0x8803c3d: cmp    $0x22,%r9
   0x8803c41: jne    0x8803c4a

Could it be a conflict in register allocation?

On Win64, I could not get anything useful from gdb (call printCallStack()
sigsegv gdb itself...).

Though, the instructions are quite similar (the register are different due
to Win64 ABI)...
(gdb) x /4i $pc
=> 0x4f02043:   mov    (%rcx),%r10
   0x4f02046:   and    $0x3fffff,%r10
   0x4f0204d:   cmp    $0x22,%r10
   0x4f02051:   jne    0x4f0205a
(gdb) print $rcx
$1 = 362

This might well be related to recurring Newspeak bootstrap crash on the CI
side...
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