[Vm-dev] temporary lock up in Cocoa VM

Eliot Miranda eliot.miranda at gmail.com
Mon Feb 15 16:45:11 UTC 2016


Hi John,

    returning to my laptop this morning I found the VM locked showing the
spinning rainbow meatball cursor. This VM uses the platforms/iOS platform
code.  I started up lldb to find out where it was locked and found out it
was in Apple code.  here's the back trace.  Luckily when I quit lldb the VM
unlocked!! :-).  Anyway, HTH

(lldb) thread backtrace
* thread #1: tid = 0x870252, 0x9a759f7a
libsystem_kernel.dylib`mach_msg_trap + 10, queue = 'com.apple.main-thread',
stop reason = signal SIGSTOP
  * frame #0: 0x9a759f7a libsystem_kernel.dylib`mach_msg_trap + 10
    frame #1: 0x9a75916c libsystem_kernel.dylib`mach_msg + 68
    frame #2: 0x9265e57a CoreGraphics`_CGSReenableUpdateForConnection + 119
    frame #3: 0x9265e28d
CoreGraphics`CGSUpdateManager::enable_update(unsigned long long) + 379
    frame #4: 0x9265e0e0 CoreGraphics`CGSReenableUpdateToken + 66
    frame #5: 0x901686d1 AppKit`NSPerformWithScreenUpdatesDisabled + 130
    frame #6: 0x9018e10f AppKit`-[NSWindow(NSWindowSharedFirstResponder)
_changeAllAttachmentsKeyState] + 82
    frame #7: 0x90189ae1 AppKit`-[NSWindow _setFrameNeedsDisplay:] + 200
    frame #8: 0x9018f33a AppKit`-[NSWindow(NSWindow_Theme)
acquireMainAppearance] + 198
    frame #9: 0x9018f1d5 AppKit`-[NSWindow becomeMainWindow] + 39
    frame #10: 0x90358b94 AppKit`_NXShowKeyAndMain + 206
    frame #11: 0x90248397 AppKit`-[NSWindow sendEvent:] + 10155
    frame #12: 0x901e491d AppKit`-[NSApplication sendEvent:] + 4034
    frame #13: 0x0012ca24 Squeak
    frame #14: 0x0012e604 Squeak
    frame #15: 0x0012e6a2 Squeak
    frame #16: 0x00138f40 Squeak
    frame #17: 0x00138f94 Squeak
    frame #18: 0x000d3498 Squeak
    frame #19: 0x000d4a66 Squeak
    frame #20: 0x0451bafb
    frame #21: 0x000c7a8a Squeak
    frame #22: 0x0013bc44 Squeak
    frame #23: 0x9bd42f70 Foundation`__NSFirePerformWithOrder + 419
    frame #24: 0x9b0862be
CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__
+ 30
    frame #25: 0x9b08620f CoreFoundation`__CFRunLoopDoObservers + 399
    frame #26: 0x9b07702e CoreFoundation`__CFRunLoopRun + 974
    frame #27: 0x9b0769ea CoreFoundation`CFRunLoopRunSpecific + 394
    frame #28: 0x9b07684b CoreFoundation`CFRunLoopRunInMode + 123
    frame #29: 0x90eccb5d HIToolbox`RunCurrentEventLoopInMode + 259
    frame #30: 0x90ecc777 HIToolbox`ReceiveNextEventCommon + 163
    frame #31: 0x90ecc6bd
HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 92
    frame #32: 0x90037349 AppKit`_DPSNextEvent + 1602
    frame #33: 0x90036870 AppKit`-[NSApplication
nextEventMatchingMask:untilDate:inMode:dequeue:] + 119
    frame #34: 0x9002915c AppKit`-[NSApplication run] + 727
    frame #35: 0x90011ff8 AppKit`NSApplicationMain + 1165
    frame #36: 0x99a40701 libdyld.dylib`start + 1
_,,,^..^,,,_
best, Eliot
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