Summer is a good time to revisit the old VMMap 2007 sample from Windows via C/C++ book. I've explained the Windows implementation improvements and the Linux port to this new blog post and the source code is available in github.com/chrisnas/ASMap. chrisnas.github.io/posts/2026-0... Happy reading!

How to map the address space of a process on Windows and Linux

From a 2007 Windows via C/C++ VMMap demo to a modern Windows 11 analyzer and its Linux /proc/smaps counterpart - and why Working Set, RSS/PSS and 'committed' memory do not mean the same thing on the t...

chrisnas.github.io

New issue of .NET R&D Digest is here! Thx to @lemire.bsky.social, @maartenballiauw.be, @chrisnas.bsky.social, @meziantou.net, @andrewlock.bsky.social & other authors for their g8 content! olegkarasik.wordpress.com/2026/07/02/n... #dotnet

.NET R&D Digest (June, 2026)

This issue includes bits of AI, software development, C++, C#, diagnostics, architecture and of course .NET and .NET Internals.

olegkarasik.wordpress.com

Let's dig into the new cDAC way to access .NET runtime internals :^) chrisnas.github.io/posts/2026-0... Happy reading!

Reading CLR internals the cDAC way: contracts instead of the DAC

Why .NET is replacing the DAC with the cDAC data contracts, how they work locally / over a process / from a dump, and how to map the GitHub .md contracts to C# - with a from-scratch !eeheap as a worki...

chrisnas.github.io

The source code and the slides of my presentation about .NET CLI tools with AI are available from github.com/chrisnas/Buc....

GitHub - chrisnas/BucharestSoftwareArchitectureSummit2026: Session content for Bucharest Software Architecture Summit 2026

Session content for Bucharest Software Architecture Summit 2026 - chrisnas/BucharestSoftwareArchitectureSummit2026

github.com

Preparing to talk about .NET CLI tool in our AI fury world at #TechWeekRO #BusinessSummits. See you there!

Moving forward into the cDAC way to access CLR internals...

It is time to use agent for production investigations! See how to leverage .NET CLI tools, MCP servers and skills in my new post

.NET CLI tools in the AI fury or how to guide agents during production investigations

How to let an AI coding agent investigate dev and production issues by driving your .NET diagnostics CLI tools — via MCP servers, SKILL.md files, or even by controlling a GUI application.

chrisnas.github.io

When you mess up with file watcher and git...

Thanks everyone for attending my #UCK26 session! The slides and source code are available from my repo - github.com/chrisnas/Upd...

GitHub - chrisnas/UpdateKrakow2026: Session for Update Conference Krakow 2026

Session for Update Conference Krakow 2026. Contribute to chrisnas/UpdateKrakow2026 development by creating an account on GitHub.

github.com

I was a HUGE fan of Cursor UI and I was forced to update to a new version today so now... it is unusable :^( Maybe it was too easy to have conversation per folder in a sidebar with most of the screen dedicated to plan. Cursor team: please let me use the previous version!!

Finishing to prepare my .NET CLI & AI session for #UCK26: dotnet-pstacks and dotnet-dstrings have been updated to behave as MCP servers with tools and custom prompts. In addition, dedicated SKILL.md files have been added to github.com/chrisnas/Deb.... Happy troubleshooting!

While preparing my session about .NET CLI and AI for #UpdateConference, I just realized that dotnet-dump was downloaded 60+ million times and still growing!

The loneliness of the speaker before his talk @kevingosse.net #Techorama

The content of my #Techorama Belgium talk is available at github.com/chrisnas/Tec...: slides and source code including the Frozen Segment implementation by @kevingosse.net

GitHub - chrisnas/Techorama2026: Techorama 2026 session

Techorama 2026 session. Contribute to chrisnas/Techorama2026 development by creating an account on GitHub.

github.com

Even when we don't co-present, @kevingosse.net is able to make me change the slides (and code) of my presentation! See you tomorrow at #Techorama!

I've just added 13 "old" posts to chrisnas.github.io: everything about TraceEvent, counters and the ClrMD series are back on line (Broken links and missing figures from Criteo)!

For my new session about .NET CLI tools and AI, I've updated my own CLI tools to support new versions of .NET in the future (dotnet-wait, dotnet-http, dotnet-gcstats, dotnet-fullgc) and act as MCP server (dotnet-pstacks, dotnet-dstrings) during production investigations Happy troubleshooting!

How to let agents investigate issues with the right SKILL.md.

Blogged: Removing byte[] allocations in .NET Framework using ReadOnlySpan<T> andrewlock.net/removingbyte... In this post I describe how to remove static byte[] allocations, even on .NET Framework, by using Span<T> look at the associated IL, and discuss the potential risks #dotnet

Removing byte[] allocations in .NET Framework using ReadOnlySpan<T>

In this post I describe how to remove static byte[] allocations, even on .NET Framework, by using Span<T>, look at the associated IL, and discuss the risks

andrewlock.net

I'm moving from Medium to Github pages! chnasarre.medium.com/aa972d9ff6c6...

I’m moving to chrisnas.github.io

For easier access, I’ve decided to move my blog to github pages at https://chrisnas.github.io/.

chnasarre.medium.com

Great discussion about "new" async/await in .NET with Andy Gocke from the .NET team! A lot for me to read and dig into the new implementation - github.com/dotnet/runti...

Magical

After DIA and DbgHelp, time to dig into ISymUnmanagedReader to get line and source information from .NET Framework symbols - chnasarre.medium.com/7663f9043b6b...

How to support .NET Framework PDB format and source line with ISymUnmanagedReader

After DIA and DbgHelp, time to dig into ISymUnmanagedReader to get its line in source code.

chnasarre.medium.com

This is nice: thanks VS!

1h40 de sujets techniques liés aux bons/mauvais usages des strings en .NET avec tout plein de questions pertinentes de @dvoituron.bsky.social, Adrien Clerbois et @peug.net. Les ressources (outils, code source et vidéos) sont aussi disponibles. devapps.ms/podcasts/116...

116 - Optimiser les Strings en .NET

devapps.ms

Why would you need .pdb files for .NET assemblies? Don't their already contain all the needed metadata? This post will show you how to extract the source code and line number information from the .pdb files generated by .NET compilers thanks to DbgHelp API. chnasarre.medium.com/4188f862211d...

But where is my method code? DbgHelp comes to the rescue

This post show how DbgHelp could help you figure out the line and source code of each managed methods from a .pdb file

chnasarre.medium.com

I just implemented a tool accepting a .pdb file to generate a .sym file listing functions symbols. A first post (chnasarre.medium.com/9826fd4f251e...) shows the coding details. I'm sharing my vibe coding experience using Cursor in a second longer one (chnasarre.medium.com/f957106a3e9f...)

How to dump function symbols from a .pdb file

Detail how to write a tool that generates a .sym file listing functions symbols with their address, size and signature from a .pdb file

chnasarre.medium.com

I spent more time than expected to understand why my .NET profiler never received the event that would help me figuring out the GC mode (Server/Workstation) but Perfview and dotnet-trace did. I needed to debug the CLR to realize that the event is emitted before the profiler gets initialized :^(

And now the profiler is deadlocking the GC :^(

When you realize that the C++ exceptions you get while debugging your complicated profiler code come from... the Windows anti-virus