generates a windows pdb from a unity il2cpp game with no external tools. reads GameAssembly.dll and global-metadata.dat (both ship with the game), dumps the il2cpp metadata natively (types, methods, signatures, il2cpp.h) and writes the pdb from scratch: msf container plus tpi / dbi / gsi / psi streams. no compiler, no linker, no il2cppdumper. x64 pe only (metadata v39, e.g. rust).

build (visual studio 2022, x64 release): msbuild rust_pdb.sln -p:Configuration=Release -p:Platform=x64

run: x64\Release\rust_pdb.exe x64\Release\rust_pdb.exe <GameAssembly.dll> <global-metadata.dat> [out.pdb]

with no arguments it auto-detects a steam rust install (GameAssembly.dll plus RustClient_Data\il2cpp_data\Metadata\global-metadata.dat) and writes the pdb next to the dll. byte-identical to the reference native writer on the same inputs (same sha256).

pipeline (all in-process): metadata global-metadata.dat parser (v39) il2cpp_binary pe parse, registration discovery, method pointers, rgctx executor type and method names, c-type signatures struct_gen il2cpp.h (fields, vtable, rgctx, static, arrays, enums) pdb writer il2cpp.h -> tpi records, procs and data symbols, msf + streams

refs: llvm pdb file format docs, microsoft-pdb reference repo perfare/il2cppdumper (metadata layout and struct generation reference)