Question 1

How to use Fasmi to disassemble a C# assembly?

Accepted Answer

Fasmi can disassemble any .NET assembly (.dll). Run 'dotnet fasmi path/to/assembly.dll' with optional flags like --language il to generate IL code, as it's language-agnostic across .NET.

Question 2

What's the difference between Fasmi and ILSpy?

Accepted Answer

Fasmi focuses on disassembling to low-level assembly or IL code via CLI with features like watch mode, while ILSpy is a GUI-based decompiler for high-level source code reconstruction. Fasmi is better for performance tuning and educational insights into JIT output.

Question 3

Does Fasmi work on .NET Core or .NET 6+?

Accepted Answer

Fasmi uses .NET 5.0 for compiling F# scripts, but it can disassemble assemblies from newer .NET versions. However, for F# scripts, the compilation is limited to .NET 5.0, which might affect feature support.

Question 4

How to interpret the assembly output from Fasmi?

Accepted Answer

The output is standard x86/x64 assembly or MSIL code without additional annotations. Users need familiarity with assembly language or IL; Fasmi provides raw disassembly for analysis or learning purposes.

Question 5

Can Fasmi be integrated into a CI/CD pipeline?

Accepted Answer

Yes, as a dotnet tool, Fasmi can be installed and run in automated environments to generate disassembly reports. Use command-line options like --output to save files, making it suitable for performance regression testing.

Question 6

Is Fasmi suitable for beginners learning .NET internals?

Accepted Answer

While educational, Fasmi requires prior knowledge of .NET and low-level concepts; it's best for developers already debugging or optimizing code, as the output is technical and lacks guided explanations.

fasm

What is fasm?

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