Why filling AA in shared library freezes execution?

Sat Feb 6 10:44:08 UTC 2021

On Saturday, 30 January 2021 at 20:32:36 UTC, Siemargl wrote:
> No, this is a deadlock in memory manager.
>
> To find roots of problem, needed a debug version of druntime, 
> but i were unsuccesfull to compile it.

I make debug vesion of druntime and catch nicer stacktrace. Maybe 
this can help somebody knowing GC internals

ntdll!ZwWaitForSingleObject+0xa
ntdll!RtlDeNormalizeProcessParams+0x5a8
ntdll!RtlDeNormalizeProcessParams+0x4a4
ntdll!RtlInitializeCriticalSectionEx+0x3b9
KERNELBASE!HeapDestroy+0x3a
KERNELBASE!GetModuleHandleExW+0x39
test_dll!D4core6thread8osthread23ll_startDLLUnloadThreadFNbNiZb+0x86
test_dll!D4core6thread8osthread20createLowLevelThreadFNbNiDFNbZvkDFNbZvZk+0x153
test_dll!D2gc4impl12conservativeQw3Gcx16startScanThreadsMFNbZv+0xc5
test_dll!D2gc4impl12conservativeQw3Gcx11fullcollectMFNbbZm+0x12f
test_dll!D2gc4impl12conservativeQw3Gcx10smallAllocMFNbmKmkxC8TypeInfoZPv+0x135
test_dll!D2gc4impl12conservativeQw14ConservativeGC__T9runLockedS_DQCeQCeQCcQCnQBs12mallocNoSyncMFNbmkKmxC8TypeInfoZPvS_DQEgQEgQEeQEp10mallocTimelS_DQFiQFiQFgQFr10numMallocslTmTkTmTxQCzZQFcMFNbKmKkKmKxQDsZQDl+0xa1
test_dll!D2gc4impl12conservativeQw14ConservativeGC6mallocMFNbmkxC8TypeInfoZPv+0x4b
test_dll!gc_malloc+0x2d
test_dll!aaGetX+0x2ca
test_dll!aaGetY+0x39
test_dll!test_dll.TestFun+0x93
test_dll_exe!D main+0x111
test_dll_exe!D2rt6dmain212_d_run_main2UAAamPUQgZiZ6runAllMFZ9__lambda1MFZv+0x33
test_dll_exe!D2rt6dmain212_d_run_main2UAAamPUQgZiZ7tryExecMFMDFZvZv+0x3c