Debugger assert - `Assert failure(PID 28244 [0x00006e54], Thread: 11360 [0x2c60]): pProcess->ThreadHoldsProcessLock()`

[AaronRobinsonMSFT]

Using Visual Studio internal preview to debug a DBG flavor of the runtime, causes the following assert to fire.

Assert failure(PID 28244 [0x00006e54], Thread: 11360 [0x2c60]): pProcess->ThreadHoldsProcessLock()

MSCORDBI! InternalDacCallbackHolder::InternalDacCallbackHolder + 0x38 (0x00007ffc`df154698)
MSCORDBI! CordbProcess::LookupMetaData + 0x49 (0x00007ffc`df17cc59)
MSCORDACCORE! DacDbiInterfaceImpl::GetMDImport + 0x186 (0x00007ffc`db15c1a6)
MSCORDACCORE! ClrDataAccess::GetMDImport + 0x4E (0x00007ffc`db17c4ae)
MSCORDACCORE! DacGetMDImport + 0x42 (0x00007ffc`db179e32)
MSCORDACCORE! PEAssembly::GetMDImport + 0x1E (0x00007ffc`db137bbe)
MSCORDACCORE! Module::GetMDImport + 0x5F (0x00007ffc`db137b8f)
MSCORDACCORE! MethodDesc::GetMDImport + 0x31 (0x00007ffc`db1e4681)
MSCORDACCORE! MethodDesc::GetAttrs + 0xA5 (0x00007ffc`db36c225)
MSCORDACCORE! MethodDesc::IsVirtual + 0x1C (0x00007ffc`db36edfc)
    File: E:\runtime\src\coreclr\debug\di\rspriv.h:11468
    Image: C:\Program Files\Microsoft Visual Studio\2022\Preview\Common7\IDE\devenv.exe

The scenario is as follows:

1. Set the following in a file to pass to corerun.exe via the -e flag OR set them for the debuggee process in some other way.

   DOTNET_TieredCompilation=0
   DOTNET_ReadyToRun=0
   

2. Use corerun.exe to run a simple helloworld console application.
3. Set breakpoint within System.Private.CoreLib, when Main will be on the stack.
4. Using the stack window, navigate to the Main frame.
5. Using the locals window, look at a local Delegate instance.

Stack from within WinDBG

[0x2]   mscordbi!DbgAssertDialog+0x31f   0x9516b7de40   0x7ffcdf154698   
[0x3]   mscordbi!InternalDacCallbackHolder::InternalDacCallbackHolder+0x38   0x9516b7e050   0x7ffcdf17cc59   
[0x4]   mscordbi!CordbProcess::LookupMetaData+0x49   0x9516b7e080   0x7ffcdb15c1a6   
[0x5]   mscordaccore!DacDbiInterfaceImpl::GetMDImport+0x186   0x9516b7e3f0   0x7ffcdb17c4ae   
[0x6]   mscordaccore!ClrDataAccess::GetMDImport+0x4e   0x9516b7e5f0   0x7ffcdb179e32   
[0x7]   mscordaccore!DacGetMDImport+0x42   0x9516b7e640   0x7ffcdb137bbe   
[0x8]   mscordaccore!PEAssembly::GetMDImport+0x1e   0x9516b7e670   0x7ffcdb137b8f   
[0x9]   mscordaccore!Module::GetMDImport+0x5f   0x9516b7e6a0   0x7ffcdb1e4681   
[0xa]   mscordaccore!MethodDesc::GetMDImport+0x31   0x9516b7e6d0   0x7ffcdb36c225   
[0xb]   mscordaccore!MethodDesc::GetAttrs+0xa5   0x9516b7e710   0x7ffcdb36edfc   
[0xc]   mscordaccore!MethodDesc::IsVirtual+0x1c   0x9516b7e780   0x7ffcdb36e38d   
[0xd]   mscordaccore!MethodDesc::IsDefaultInterfaceMethod+0x4d   0x9516b7e7b0   0x7ffcdb36cf60   
[0xe]   mscordaccore!MethodDesc::GetNativeCode+0x30   0x9516b7e7f0   0x7ffcdb15d1bf   
[0xf]   mscordaccore!DacDbiInterfaceImpl::GetMethodRegionInfo+0x7f   0x9516b7e840   0x7ffcdb15dd3e   
[0x10]   mscordaccore!DacDbiInterfaceImpl::GetNativeCodeInfo+0x12e   0x9516b7e910   0x7ffcdf251c17   
[0x11]   mscordbi!CordbObjectValue::GetFunctionHelper+0x217   0x9516b7e9b0   0x7ffcdf251959   
[0x12]   mscordbi!CordbObjectValue::GetFunction+0x799   0x9516b7eb90   0x7ffce0b1a1c3   
...

[dotnet-policy-service]

Tagging subscribers to this area: @tommcdon
See info in area-owners.md if you want to be subscribed.