JitInspect 1.0.3

JitInspect

JitInspect disassembles JIT compiled managed methods to a x86/x64/Arm64 ASM. Inspired by JitBuddy

NuGet

https://www.nuget.org/packages/JitInspect

dotnet add package JitInspect

Usage

using JitInspect;
TestMethod(1, 1);
var action = TestMethod;
Console.WriteLine(action.Method.Disassemble(maxRecursiveDepth: 1, printSource: true));

static void TestMethod(int a, int b)
{
    for (int i = 0; i < a; i++)
        Console.WriteLine(a + b);
}

Output: 2

; Program.<<Main>$>g__TestMethod|0_0(Int32, Int32)
       push      rbp
       sub       rsp,70
       lea       rbp,[rsp+70]
       xor       eax,eax
       mov       [rbp-3C],eax
       mov       [rbp+10],ecx
       mov       [rbp+18],edx
;     for (int i = 0; i < a; i++)
;          ^^^^^^^^^
       xor       eax,eax
       mov       [rbp-3C],eax
       mov       dword ptr [rbp-48],3E8
       jmp       short M00_L01
M00_L00:
       mov       rcx,7FFF7F562790
       call      CORINFO_HELP_COUNTPROFILE32
;         Console.WriteLine(a + b);
;         ^^^^^^^^^^^^^^^^^^^^^^^^^
       mov       eax,[rbp+10]
       mov       ecx,eax
       add       ecx,[rbp+18]
       call      qword ptr [7FFF7F5446C0]; System.Console.WriteLine(Int32)
       mov       eax,[rbp-3C]
       inc       eax
       mov       [rbp-3C],eax
M00_L01:
       mov       eax,[rbp-48]
       dec       eax
       mov       [rbp-48],eax
       cmp       dword ptr [rbp-48],0
       jg        short M00_L02
       lea       rcx,[rbp-48]
       mov       edx,10
       call      CORINFO_HELP_PATCHPOINT
M00_L02:
       mov       eax,[rbp-3C]
       cmp       eax,[rbp+10]
       jl        short M00_L00
       mov       rcx,7FFF7F562794
       call      CORINFO_HELP_COUNTPROFILE32
       nop
       add       rsp,70
       pop       rbp
       ret
; Total bytes of code 130

; System.Console.WriteLine(Int32)
       push      rbx
       sub       rsp,20
       mov       ebx,ecx
       call      qword ptr [7FF8C9EE4930]
       mov       rcx,rax
       mov       edx,ebx
       lea       r11,[System.IO.ConsoleStream.get_CanSeek()]
       cmp       [rcx],ecx
       call      qword ptr [r11]
       nop
       add       rsp,20
       pop       rbx
       ret
; Total bytes of code 37

Credits

• JitBuddy
• ClrMD
• BenchmarkDotNet
• iced
• Capstone.NET

LICENSE

MIT