Debug FASM with VS Code

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KIRK

Joined: 05 Dec 2007
Posts: 20
Location: Russia

KIRK 10 Jul 2022, 08:39

VS Code is probably one of the most convenient code editors, it would be cool to make an extension for debugging applications on FASM or use an existing extension and somehow tweak it to generate and use a .fas debug file.

Some links I have already found:

CodeLLDB
https://marketplace.visualstudio.com/items?itemName=vadimcn.vscode-lldb

Native Debug (GDB, LLDB support)
https://marketplace.visualstudio.com/items?itemName=webfreak.debug

MASM/TASM (works via DOSBox)
https://marketplace.visualstudio.com/items?itemName=xsro.masm-tasm

Symbolic/debug information
https://board.flatassembler.net/topic.php?t=9792

OLLY plugin which adds FASM debug info
https://board.flatassembler.net/topic.php?p=114370

My debugging symbols solution
https://board.flatassembler.net/topic.php?p=149572#149572

Adding windows debug info into .obj file generated fasm
https://board.flatassembler.net/topic.php?p=89369

VS Code Launch Configuration
https://code.visualstudio.com/docs/editor/debugging#_launch-configurations

Last edited by KIRK on 10 Jul 2022, 18:42; edited 6 times in total

10 Jul 2022, 08:39

Roman

Joined: 21 Apr 2012
Posts: 1363

Roman 10 Jul 2022, 08:50

Nice write json highlightings syntax fasm.
I try do this in vs code.

I find vim macro cool feature.
https://www.youtube.com/watch?v=3lmsPScLHb0

Last edited by Roman on 10 Jul 2022, 09:48; edited 1 time in total

10 Jul 2022, 08:50

KIRK

Joined: 05 Dec 2007
Posts: 20
Location: Russia

KIRK 10 Jul 2022, 09:46

These are my settings for CodeLLDB.

Steps:
- add settings below
- open your asm file
- add int3 instruction at the beginning
- press F5 twice for x86, once for x64

Sample file:

Code:

format PE64 GUI
; format PE GUI 4.0
; include 'win32a.inc'
entry @start

@start:
        int3
        mov eax, 3
        ret

.vscode/launch.json

Code:

{
  "version": "0.2.0",
  "configurations": [
    {
      "type": "lldb",
      "request": "launch",
      "name": "Debug",
      "cwd": "${fileDirname}",
      "program": "${fileBasenameNoExtension}.exe",
      "preLaunchTask": "Сompile",
      "args": [],
    }
  ]
}

.vscode/tasks.json

Code:

{
  "version": "2.0.0",
  "tasks": [{
      "type": "process",
      "label": "Сompile",
      "command": "C:/FASM/FASM.EXE",
      "options": {
        "cwd": "${fileDirname}"
      },
      "args": ["${file}", "${fileBasenameNoExtension}.exe"]
  }]
}

settings.json

Code:

"terminal.integrated.env.windows": {
  "INCLUDE": "C:/FASM/INCLUDE",
}

10 Jul 2022, 09:46

KIRK

Joined: 05 Dec 2007
Posts: 20
Location: Russia

KIRK 10 Jul 2022, 11:55

Run with custom debugger:

"F5 Anything" extension
https://marketplace.visualstudio.com/items?itemName=discretegames.f5anything

.vscode/launch.json

Code:

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Debug with OllyDbg",
      "type": "f5anything",
      "request": "launch",
      "command": "\"C:/OllyDbg/ollydbg.exe\" \"${fileDirname}/${fileBasenameNoExtension}.exe\"",
      "preLaunchTask": "Сompile",
    }
  ]
}

10 Jul 2022, 11:55

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