Access to origin (without optimizations) Stack Trace in .NET 8+ with PGO

[djfoxer]

Hi, with .NET8+ and PGO enabled code might be changed in runtime. So when we check Stack Trace at Environment.StackTrace or Exception.StackTrace we have stack changed by PGO and other optimizations. Can we somehow get access to origin Stack Trace (without optimizations)?

[dotnet-issue-labeler]

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[dotnet-issue-labeler]

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[Forgind]

Hi @djfoxer!

I'm not 100% sure I understand your question, so please correct me if this doesn't make sense.

Enabling PGO means it should just spend more time optimizing certain code paths and predicting conditions more accurately based on your data. That might mean rearranging the order that it tries to execute things—not sure about that—but I imagine it ensures that any variable accesses have the right data at the time of access regardless of optimizations, or else it isn't an optimization but a bug.

What do you need the stack traces for? Most uses of stack traces I can think of are in testing or debugging, and for that I'd just disable optimizations in the first place.