Windows x86 CoreCLR assert failure: ExecutionManager::IsManagedCode(GetControlPC(pCF->GetRegisterSet()))

[jkoritzinsky]

When running the DllImportGenerator.Tests test suite against CoreCLR x86 Checked builds, sometimes we get an assert failure when calling GC.Collect in an UnmanagedCallersOnly method that was called from managed code with some native code in between.

See https://dev.azure.com/dnceng/public/_build/results?buildId=1429326&view=ms.vss-test-web.build-test-results-tab&runId=41318808&resultId=188820&paneView=debug for a repro in a rolling build.

This took about 40-50 runs locally to reproduce, so it's a rare occurrence.

After some basic investigation, it looks like the CrawlFrame instance has a null ControlPC, so something is not being constructed/discovered correctly with it.

[jkoritzinsky]

cc: @AaronRobinsonMSFT @elinor-fung @janvorli @davidwrighton

[janvorli]

I am looking into it.

[janvorli]

It looks like yet another place that needs to be touched to support stack walking when calling managed method marked as native callable only from another managed function without intermediate native frames. Similar to what I've fixed in #58796 some time ago.

[jkotas]

Fixed by #63826