Disasmo

VS2022 Add-in. Click on any method or class to see JIT's codegen and more.

Starting with .NET 7.0 RC1 this add-in no longer requires a local build of dotnet/runtime repo. However, it offers more features with a local one, to obtain a local one please follow these steps:

git clone git@github.com:dotnet/runtime.git
cd runtime
build.cmd Clr+Clr.Aot+Libs -c Release -rc Checked

# optional (for crossgen2 + arm64 for hw intrinsics):
build.cmd Clr.CoreLib -c Release -a arm64

See windows-requirements.md.

Release notes

See RELEASE_NOTES.md

Installation

Click on Extensions\Manage Extensions menu, select Online tab and type Disasmo in the "Search" text box. Once the add-in is installed you have to close all active instances of VS2022 to let the installer finish its job.

Features

• Hot-key to quickly see codegen (Alt+Shift+D by default, can be changed in VS's settings)
• Is able to show codegen for ARM64
• Flowgraphs and JitDumps for JIT contributors
• Diffs
• "System.Runtime.Intrinsics quick search" tab
• Inliner's decisions
• 'Run' mode. Is useful for e.g. PGO inspection

Known Issues

• Only .NET 6.0 and later projects are supported with custom runtime
• .NET 7.0 RC1 (or newer) is needed for non-custom runtime mode
• I only tested it for simple Console Apps, but it should work for libs as well
• Generic methods are only supported in 'Run' mode
• Resharper hides Roslyn actions by default (Uncheck "Do not show Visual Studio Light Bulb").
• The lightbulb can be slow on first launch

3rd party dependencies

• MvvmLight (MIT)
• AvalonEdit (MIT)