Il2CppInspector | Powerful automated tool for reverse engineering Unity IL2CPP binaries | Reverse Engineering library

Build the CLI and Windows GUI versions:.
Three Powershell scripts are provided to enable easy building and testing of IL2CPP binaries:. builds each C# source file ìnto a .NET assembly DLL, a C++ source folder and one IL2CPP binary per supported architecture. builds MyFirstTest.cs into MyFirstTest.dll, creates a C++ source folder named MyFirstTest and an IL2CPP binary for each supported architecture. builds MyFirstTest.cs and MySecondTest.cs into individual assembly DLLs, C++ source folders and IL2CPP binaries, using Unity 2019.3.1f1. as above but specifies a custom path for your Unity installation. The minimum supported Unity version is 2017.1.0f3. To learn more about these features, see the section entitled Using Il2CppInspector to generate IL2CPP code in IL2CPP Reverse Engineering Part 1.
il2cpp.ps1 is the main workhorse and compiles each specified C# source file in TestSources (or all of them if none supplied) as a separate assembly, and outputs them to TestAssemblies. It then takes every specified assembly in TestAssemblies and compiles each one as a separate IL2CPP project for each of these architectures: Windows x86 standalone Windows x64 standalone Android ARMv7 (32-bit) Android ARMv8-A (64-bit) These are placed into the TestBinaries folder. The C++ source code for each build is placed into the TestCpp folder. It then calls generate-tests.ps1. Specify a comma-separated list of source files (without the .cs extension) to process as the first argument (or -assemblies). You can optionally specify a Unity version or Unity install path with the 2nd argument (or -unityVersion). If none is supplied, the latest installed Unity version will be used. You can also specify wildcards, eg. 2019* will use the latest installed version of Unity 2019, 2018.3* will use the latest installed version of Unity 2018.3 etc. Use Unity Hub to install the desired versions. Therefore with one command you can generate an assembly DLL, C++ source code and IL2CPP binary for each architecture for any given list of source files, one set of outputs per source file, for a specified version of Unity.
generate-tests.ps1 generates a file called Tests.cs in the Il2CppTests project, containing one test per IL2CPP project in TestBinaries. This file will be compiled by the Il2CppTests project. You will then be able to see one test per IL2CPP project in Visual Studio's Test Explorer. The auto-generated tests generate C#, JSON and C header files in the test IL2CPP binary's folder in TestBinaries (each filename prefixed with test) and compares them (whitespace-insensitive) with the corresponding project name files in TestExpectedResults. In this way, you can check for files with known structure that the analysis is being performed correctly, or step through the analysis of specific binaries in the debugger without having to change the project's command-line arguments.
update-expected-results.ps1 copies all of the output test results from TestBinaries into TestExpectedResults, therefore updating the files that will be used to verify correct test results.