Geant4-v11.1.2 PTL error on macOS Sonoma

[ohynkwn]

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_Geant4 Version:_11.1.2
_Operating System:_macOS Sonoma (Version 14, MacOSX14.0.sdk)
_Compiler/Version:_Apple clang version 15.0.0 (clang-1500.0.40.1)
_CMake Version:_3.27.6
_QMake Version:_3.1 (Using Qt version 5.15.10 in /usr/local/Cellar/qt@5/5.15.10_1/lib)

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Hi all,

Based on my experience, almost every macOS huge update makes some small compiler errors, so I was ready to handle this. However, this time is a bit weird for me. I am not sure that the problem below would be from macOS Sonoma or something else.

The “geant4-v11.1.2” source file in my /usr/local/Geant4/source directory was successfully built without any errors during each step, including “ccmake,” “make,” and “make install.” However, upon attempting to execute “exampleB1,” I encountered the following error messages:

I’ve already ruled out permission issues by applying “chmod -R 777” to the directories. Could this problem possibly stem from threads, version mismatches, or PTL file issues?

I believe this to be a minor issue. Would you be able to investigate and provide some insight into resolving it? Your assistance is greatly appreciated. Thank you.

[bmorgan]

Just to confirm, this is an Intel Mac? If so, what chip does it report in “About this Mac”. We have observed something similar in very preliminary Sonoma/Clang 15 tests, so this is a useful test case.

[ohynkwn]

Thank you for your fast response. Yes, this Mac is an intel one.

[bmorgan]

As a temporary workaround, it looks like this doesn’t affect the classic POSIX threading mode, so running the example as:

$ G4FORCE_RUN_MANAGER_TYPE=MT ./exampleB1 ...

Should allow you to work until we have a full triage and fix in place. That should work with any Geant4 application provided the run manager factory is used to instantiate the G4RunManager, e.g.

auto* runManager = G4RunManagerFactory::CreateRunManager(G4RunManagerType::Default);

[bmorgan]

For tracking and reference on fixes, I’ve created 2564 – EXC_BAD_ACCESS (code=EXC_I386_GPFLT) errors from PTL::ThreadPool on Intel Macs with Clang 15

It’s not totally clear if this is a bug on our side or a compiler/system one, but there are workarounds, and a patch is in testing.

[bmorgan]

A workaround patch for 11.1 is now posted on Bugzilla 2564. It should be considered a workaround for now, and does require a rebuild of Geant4 after applying it.

The Bugzilla ticket will be kept open until we fully understand if this is a system/compiler problem or a true issue in Geant4.

[ohynkwn]

Thank you so much for your work, and the command “G4FORCE_RUN_MANAGER_TYPE=MT ./exampleB1” works not only for exampleB1 but the others too! I was using my institution’s server computer (CentOS) instead during that time, so sorry for the late response.