Error on attach ... key 'processId' not found when trying attach neovim-dap debug adapter to netcoredbg

Question

Additional to a configuration where netcoredbg is started I want to have a configuration where I attached dap to the running debug server. For that I added a coreclrattach adapter and a corresponding attach configuration:

local dap, dapui = require("dap"), require("dapui")

dap.adapters.coreclr = {
  type = 'executable',
  command = '/usr/local/netcoredbg',
  args = { '--interpreter=vscode' },
}

dap.adapters.coreclrattach = {
  type = 'server',
  port = 4711,
}

dap.configurations.cs = {
  {
    type = "coreclr",
    name = "launch - netcoredbg",
    request = "launch",
    program = function()
      return vim.fn.input('Path to dll', vim.fn.getcwd() .. '/bin/Debug/', 'file')
    end,
  },
  {
    type = "coreclrattach",
    name = "attach - netcoredbg",
    request = "attach",
    pid = require('dap.utils').pick_process,
    args = {},
  },
}

In one shell session I start debugging with

/usr/local/netcoredbg --interpreter=vscode --server -- dotnet run -c Debug

and in the other session I start debugging with the attach configuration

Configuration:
1: launch - netcoredbg
2: attach - netcoredbg
Type number and <Enter> or click with the mouse (q or empty cancels): 2

with selecting the process to be debugged.

However attaching seems not to work and this error is raised:

Error on attach: can't parse: [json.exception.out_of_range.403] key 'processId' not found

log file log.txt imho bears no additional information:

9827.176 I/NETCOREDBG(P60708, T60708): main.cpp: main(431) > Netcoredbg started
9853.273 I/NETCOREDBG(P60708, T60708): main.cpp: instantiate_protocol(113) > Creating protocol VSCodeProtocol
9853.274 I/NETCOREDBG(P60708, T60708): main.cpp: main(475) > pidDebugee 0
9853.274 I/NETCOREDBG(P60708, T60832): ioredirect.cpp: worker(164) > worker started
9853.275 E/NETCOREDBG(P60708, T60836): vscodeprotocol.cpp: HandleCommandJSON(855) > JSON error: [json.exception.out_of_range.403] key 'processId' not found
9853.280 I/NETCOREDBG(P60708, T60708): vscodeprotocol.cpp: ReadData(872) > EOF

What I also tried

In another post I found, that processId is used instead of pid - which I took from this cookbook.

Hence I adapted my configuration to

  {
    type = "coreclrattach",
    name = "attach - netcoredbg",
    request = "attach",
    processId = require('dap.utils').pick_process,
    args = {},
  },

repeated to start the debugging session, but got

Failed command 'configurationDone' : 0x80070057

Is there a way to achieve this?

raised also an issue with netcoredbg : https://github.com/Samsung/netcoredbg/issues/139

score 0 · Answer 1 · answered Sep 01 '23 at 09:21

I confused how to wire up NeoVim/DAP with netcoredbg - I basically tried to attach to netcoredbg from DAP instead of starting netcoredbg which then itself attaches to the debuggee.

This is my working configuration:

local dap, dapui = require("dap"), require("dapui")

-- dap.set_log_level('DEBUG')

dap.adapters.coreclr = {
  type = 'executable',
  command = '/usr/local/netcoredbg',
  args = { '--interpreter=vscode' },
}

dap.configurations.cs = {
  {
    type = "coreclr",
    name = "launch - netcoredbg",
    request = "launch",
    program = function()
      return vim.fn.input('Path to dll', vim.fn.getcwd() .. '/bin/Debug/', 'file')
    end,
  },
  {
    type = "coreclr",
    name = "attach - netcoredbg",
    request = "attach",
    processId = require('dap.utils').pick_process,
  },
}

dapui.setup()

Error on attach ... key 'processId' not found when trying attach neovim-dap debug adapter to netcoredbg

What I also tried

1 Answers1