C# Language Internals
summary
Live demo of compiler internals showing the actual code paths: inspects Roslyn source and generated IL, attaches the compiler in the debugger, and opens WinDbg/SOS to run dumpheap and dumpil. Shows events implemented with a generated add/remove loop using interlocked compare-exchange, explains synthetic synchronous entrypoints for async main, and walks the async lowering that builds a struct state machine which does state machine boxing when an await yields, hoists evaluation-stack temporaries to fields, and uses ExceptionDispatchInfo for await-in-finally.
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chapters (20)
- 0:00Start
- 2:20Initializers
- 2:35Interpolated Strings
- 2:59Events
- 5:58Multicast Delegate
- 8:04Interlock Compare Exchange
- 8:58Source Code
- 9:08Roslin Source Code
- 11:28Async Tasks
- 12:10Async Main
- 21:39Get Well-Known Member
- 22:56Display Classes
- 23:53Async Method
- 26:54Async State Machine
- 41:30Stacks Building
- 45:16Hidden Hot Potato
- 46:25Exception Dispatch Infer
- 46:45Runtime Exception Services
- 48:50Transparent Identifier
- 50:42Polymorphic Inline Cache
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