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Fix extra stack frame on exception stack trace #99263
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Why do we want NATIVEAOT behavior to be different?
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I am actually not sure if the issue occurs with NativeAOT too. It uses a different way of filtering frames in the UpdateStackTrace based on equal frame pointers, which doesn't work on coreclr. So I've made the change for coreclr, but plan to investigate the nativeaot case.
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What does the diagnostic test that this fixing do?
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It is the NestedException2 test. Basically, there is this code:
The
ExceptionsTestHelper.Bar<int>(1);
just throwsInvalidOperationException
. The issue is that theException
thrown in the code above has the line ofExceptionsTestHelper.Bar<int>(1);
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I see the
My.Main()
line duplicated:There is ifdefed-out code in UpdateStackTrace that seems to be dealing with this situation:
runtime/src/coreclr/nativeaot/Runtime.Base/src/System/Runtime/ExceptionHandling.cs
Lines 966 to 968 in 68f7885
Can this bug be fixed by deleting the ifdef in
UpdateStackTrace
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No, that's what I've mentioned above. The frame pointer check doesn't work in coreclr, since there are cases where two non-funclet methods have the same frame pointer - when they don't use Rbp as a frame pointer and use just Rsp instead. I've actually attempted to fix the problem by removing the ifdef, thinking I was originally wrong. But then another diagnostic test started to fail due the fact I've just mentioned.