前言

經常有人問：怎麽檢視.NET組譯程式碼？一般的來說檢視ASM，可以透過VS選單欄-】偵錯-】組譯，來檢視。此處檢視的是ASM是未最佳化，粗糙的程式碼。專業點的會透過設定環境變量，Release編譯檢視。

C:\test>set DOTNET_JitDisasm=MainC:\test>dotnet run -c Release;Assembly listing for method ConsoleApplication.Program:Main(System.Collections.Generic.IEnumerable`1[System.String]):System.String (Instrumented Tier0);Emitting BLENDED_CODE for X64 with AVX512 - Windows;Instrumented Tier0 code;rbp based frame;fully interruptibleG_M000_IG01: ;; offset=0x0000pushrbpsubrsp, 208learbp, [rsp+0xD0]xoreax, eaxmovqword ptr [rbp-0x98], raxvxorpsxmm4, xmm4, xmm4vmovdqaxmmword ptr [rbp-0x90], xmm4vmovdqaxmmword ptr [rbp-0x80], xmm4vmovdqaxmmword ptr [rbp-0x70], xmm4vmovdqaxmmword ptr [rbp-0x60], xmm4vmovdqaxmmword ptr [rbp-0x50], xmm4movqword ptr [rbp-0x40], raxmovqword ptr [rbp-0xB0], rspmovgword ptr [rbp+0x10], rcx

更專業的可以透過LLDB來檢視，但這些過程比較麻煩，有無簡化的方法？當然有，即是VS2022+.NET頂級技術合成外掛程式:Disasmo，後端透過LLVM操控。

Disasmo

外掛程式用法：

VS2022選單欄-】擴充套件-】管理擴充套件，搜尋:Disasmo，下載即可

如果你在VS2022裏面下載擴充套件外掛程式速度非常慢，則可以在以下地址直接下載vsix外掛程式：

https://marketplace.visualstudio.com/items?itemName=EgorBogatov.Disasmo

下載下來之後，雙擊 Disasmo.Vsix.vsix，選擇:Microsoft Visual Stuido Version Selector，彈出安裝對話方塊

安裝下即可，這裏需要註意如果你用命令列安裝：

PSC:\> code --install-extension .\Disasmo.Vsix.vsixInstallingextensions...Error: extension/package.json not found inside zip.atZipFile.<anonymous> (D:\visusl_studio_code\Microsoft VS Code\resources\app\out\vs\code\node\cliProcessMain.js:18:15678)atObject.onceWrapper (node:events:628:28)atZipFile.emit (node:events:514:28)atFdSlicer.<anonymous> (D:\visusl_studio_code\Microsoft VS Code\resources\app\node_modules.asar\yauzl\index.js:202:10)atObject.onceWrapper (node:events:628:28)atFdSlicer.emit (node:events:514:28)atonCloseDone (D:\visusl_studio_code\Microsoft VS Code\resources\app\node_modules.asar\fd-slicer\index.js:74:12)atD:\visusl_studio_code\Microsoft VS Code\resources\app\node_modules.asar\graceful-fs\graceful-fs.js:61:14atFSReqCallback.oncomplete (node:fs:202:23)FailedInstalling Extensions: file:///c:/Disasmo.Vsix.vsix