Re: Running area detector simulator IOC on OS X aarch64 (M2) , segmentation fault

[Heinz Junkes via Tech-talk <tech-talk@aps.anl.gov>]

Hi Érico,

i have now tried the whole thing on darwin-x86 and get this:

epics> save_restore:write_save_file: Backup file (./autosave/auto_settings.savB) bad or not found.  Writing a new one. [231004-221444]

dbpf 13SIM1:cam1:Acquire 1

DBF_STRING:         "Acquire"

NDArrayPool:release ERROR, reference count < 0 pArray=0x7fa034009508

Thread SimDetTask (0x60000306dd40) can't proceed, suspending.

Dumping a stack trace of thread 'SimDetTask':

epics> [       0x10883c300]: /Users/junkes/EPICS/epics-base/lib/darwin-x86/libCom.3.22.1.dylib(epicsStackTrace+0x70)

[       0x10882d25e]: /Users/junkes/EPICS/epics-base/lib/darwin-x86/libCom.3.22.1.dylib(cantProceed+0xae)

[       0x107195e97]: /Users/junkes/EPICS/epics-support/areaDetector/ADCore/lib/darwin-x86/libADBase.dylib(_ZN11NDArrayPool7releaseEP7NDArray+0x167)

[       0x107120f82]: /Users/junkes/EPICS/epics-support/areaDetector/ADSimDetector/lib/darwin-x86/libsimDetector.dylib(_ZN11simDetector12computeImageEv+0x672)

[       0x1071234a6]: /Users/junkes/EPICS/epics-support/areaDetector/ADSimDetector/lib/darwin-x86/libsimDetector.dylib(_ZN11simDetector7simTaskEv+0x156)

[       0x1071247b9]: /Users/junkes/EPICS/epics-support/areaDetector/ADSimDetector/lib/darwin-x86/libsimDetector.dylib(_ZL8simTaskCPv+0x9)

[       0x10883780b]: /Users/junkes/EPICS/epics-base/lib/darwin-x86/libCom.3.22.1.dylib(start_routine+0x14b)

[    0x7ff8141381d3]: /usr/lib/system/libsystem_pthread.dylib(_pthread_start+0x7d)

[    0x7ff814133bd3]: /usr/lib/system/libsystem_pthread.dylib(thread_start+0xf)

On 28. Sep 2023, at 15:59, Érico Nogueira Rolim <erico.rolim@lnls.br> wrote:

Hi,

If getting a traceback via a debugger is an option, then you can also attempt to set a watchpoint for the pNDArrayPool member of the NDArray object, in order to find out when it gets set to 0.

Cheers,

Érico

On 28/09/2023 10:18, Mark Rivers via Tech-talk wrote:

Hi Heinz,

Some questions:

• Have any images been collected before this error?
• What plugins are running?
• What happens if you disable all plugins before starting acquisition?
• Can you get a traceback when NDArray::release is called and NDArray.pNDArrayPool is 0?  

Mark

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