From 'dotnet run' to 'hello world'
Download as PPTX, PDF8 likes88,877 views
The document outlines the main components and initialization process of the .NET runtime, along with details on the hosting API and Just-In-Time (JIT) compilation. It includes insights into the architecture, such as the coreclr repository, and discusses type loading, garbage collection, and performance analysis. Resources for further exploration of .NET internals and the CLR's functionalities are also provided.
From 'dotnet run' to 'hello world'
- 1. From ‘dotnet run’ to “Hello World” @matthewwarren mattwarren.org
- 2. From ‘dotnet run’ to “Hello World” http://raygun.com/apm
- 3. I ❤ ‘.NET Internals’
- 4. Understand one level below your usual abstraction Neal Ford
- 5. Demo – “Hello World”
- 6. Outline • Main Components • Hosting the runtime • CLR Initialisation • Type Loader • JIT Compilation • Everything Else
- 8. CoreCLR Repository • 2.6 million of source code, under src • 8.2 million lines of test code • 24,485 Files (7,466 source & 17,019 test) – 6,626 C# (956 source & 5,670 test) – 2,074 C and C++ – 3,701 IL – 93 Assembler, 43 Python & 6 Perl!!
- 17. Virtual Machine (VM) • Type System, Generics • Built-in Types • Loading types/classes • Threading • Exception Handling and Stack Walking • Event Tracing and Profiling • P/Invoke
- 18. Hosting
- 19. Hosting API 1. Identify the managed entry point 2. Find and load CoreCLR.dll 3. Get an ICLRRuntimeHost2 Instance 4. Set start-up flags and start the runtime 5. Preparing AppDomain settings 6. Create the AppDomain 7. Run managed code 8. Clean up https://docs.microsoft.com/en-us/dotnet/core/tutorials/netcore-hosting
- 20. Demo – Hosting API
- 21. Initialisation
- 22. Initialising the CLR • Phase 1 - Set-up infrastructure for all components • Phase 2 - Initialise the core, low-level components • Phase 3 - Start-up the low-level components, i.e. error handling, profiling API, debugging • Phase 4 - Start the main components, i.e. GC & AppDomains • Phase 5 - Final setup and send out a notification http://mattwarren.org/2017/02/07/The-68-things-the-CLR-does-before- executing-a-single-line-of-your-code/
- 23. Demo - PerfView
- 27. https://docs.microsoft.com/en-us/dotnet/standard/garbage-collection/fundamentals
- 28. Type Loader
- 32. JIT Compilation
- 35. http://mattwarren.org/2017/12/15/How-does-.NET-JIT-a- method-and-Tiered-Compilation/ Before JIT-ing After JIT-ing with ‘Tiered Compilation’
- 36. http://mattwarren.org/2017/12/15/How-does-.NET-JIT-a- method-and-Tiered-Compilation/ After JIT-ing with ‘Tiered Compilation’ - Optimised
- 37. Everything Else
- 39. Resources • http://mattwarren.org/tags/#Internals – Resources for Learning about .NET Internals – Exploring the Internals of the .NET Runtime – Tools for Exploring .NET Internals – Presentations and Talks covering '.NET Internals' • Book of the Runtime (BotR) – https://github.com/dotnet/coreclr/tree/master/Document ation/botr
- 40. I ❤ ‘.NET Internals’ AMA
Editor's Notes
- #5: We’re Engineers, we love knowing what’s going on ‘under the hood’ Helps with Perf (Ben Adams, Kestrel, TechEmpower, deep JIT knowledge) As a community we should understand our ecosystem
- #10: mscorlib is now System.Private.CoreLib
- #11: mscorlib is now System.Private.CoreLib
- #12: mscorlib is now System.Private.CoreLib
- #13: mscorlib is now System.Private.CoreLib
- #14: mscorlib is now System.Private.CoreLib
- #15: mscorlib is now System.Private.CoreLib
- #16: mscorlib is now System.Private.CoreLib
- #17: mscorlib is now System.Private.CoreLib
- #23: Phase 1 – Config, ThreadManager, ETW Events, Diagnostics & Perf logs Phase 2 – Assembly Binding (aka “Fusion”), Perf Counters, Stub Manager, Debugger Manager Phase 3 – Also initial runtime thread is started Phase 4 – Code Access Security (CAS), Stack Probes, Phase 5 - Set-up all the shared static variables
- #32: Partially filled in ‘data structures’ More data is added at each step A class can only progress through the steps if it’s dependencies also progress