JitInspect 1.0.3

JitInspect

👁 NuGet

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

LICENSE

MIT