Can't get Unity Debugger to work

[Imlimp]

When I run "lua require("dap").continue()" I get this output:

UnityDebug: Initializing
UnityDebug: Searching for Unity process 'Unity Editor'
UnityDebug: Multiple targets with name 'Unity Editor' running. Unable to connect.
Use "Unity Attach Debugger" from the command palette (View > Command Palette...) to specify which process to attach to.
UnityDebug: Found Unity process 'Unity Editor (Unity)' (52762)
UnityDebug: Found Unity process 'Unity Editor (Unity)' (52760)
UnityDebug: Found Unity process 'Unity Editor (Unity)' (47696)

Do anyone know what I am doint wrong?

This is my current setup:

local dap = require('dap')

dap.adapters.unity = {
type = 'executable',
command = '/Library/Frameworks/Mono.framework/Versions/Current/Commands/mono',
args = {'/Users/linus/.vscode/extensions/unity.unity-debug-3.0.2/bin/UnityDebug.exe'}
}

dap.configurations.cs = {
{
type = 'unity',
request = 'attach',
name = 'Unity Editor',
}
}

require("dapui").setup({})

[nagaohiroki]

please add 'path' parameter. dap can find your Unity proccess.

dap.configurations.cs = {
{
type = 'unity',
request = 'attach',
name = 'Unity Editor',
path = 'YourUnityProject/Library/EditorInstance.json'
}
}

[yemibox51]

@Imlimp @nagaohiroki How are you able to configure the adapter now that VSDebug has been deprecated and newer versions of Unity are using Unity for VS Code extension?

[nagaohiroki]

@yemibox51
I tried the new Unity Debugger.
Error occurs while connecting to Unity
vstuc.log
(my settings may be wrong)

dap.adapters.vstuc= {
	type = 'executable',
	command = vim.env.HOME .. '/AppData/Roaming/Code/User/globalStorage/ms-dotnettools.vscode-dotnet-runtime/.dotnet/7.0.14~x64/dotnet.exe',
	args = {vim.env.HOME .. '/.vscode/extensions/visualstudiotoolsforunity.vstuc-0.9.3/bin/UnityDebugAdapter.dll'},
	name = 'Attach to Unity',
}
dap.configurations.cs = {
	{
		type = 'vstuc',
		request = 'attach',
		name = 'Attach to Unity',
		-- path = 'UnityProject/Library/EditorInstance.json -- not working?
		logFile = vim.env.HOME .. "/Desktop/vstuc.log",
		endPoint = "127.0.0.1:56912" -- from Unity Editor.log 

	},
}

[PostCyberPunk]

instead absolute path, you can use

          path = vim.fn.getcwd().."/Library/EditorInstance.json",

as for vstuc, it may has some optimization that cant fit in neovim based on the trace

--> E (output): {"type":"event","event":"output","body":{"output":"Debugger catastrophic exception: `System.NullReferenceException: Object reference not set to an instance of an object.\r\n   at Microsoft.VisualStudio.Unity.ExceptionManager.ProcessRequest(SetExceptionBreakpointsArguments arguments)\r\n   at Microsoft.VisualStudio.Unity.AD7DebugAdapter.HandleSetExceptionBreakpointsRequest(SetExceptionBreakpointsArguments arguments)\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.DebugAdapterBase.HandleProtocolRequest(String requestType, Object requestArgs)\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.DebugAdapterBase.OnProtocolRequestReceived(Object sender, RequestReceivedEventArgs e)\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.DebugProtocol.OnRequestReceived(String command, IRequestResponder responder)\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.DebugAdapterBase.HandleSetExceptionBreakpointsRequestAsync(IRequestResponder`1 responder)\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.DebugAdapterBase.HandleSetExceptionBreakpointsRequestAsync(IRequestResponder`2 responder)\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.DebugAdapterBase.<InitializeProtocolClient>b__5_36(IRequestResponder`2 r)\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.RequestWithResponseInfo`2.InvokeHandler(DebugProtocol protocol, ProtocolRequest request, Object args)\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.DebugProtocol.HandleIncomingRequest(String msg)\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.DebugProtocol.HandleIncomingMessage(String msg)\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.DebugProtocol.ProcessMessageBody()\r\n   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.DebugProtocol.ReaderThreadProc()`"},"seq":94}
System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.VisualStudio.Unity.ExceptionManager.ProcessRequest(SetExceptionBreakpointsArguments arguments)
   at Microsoft.VisualStudio.Unity.AD7DebugAdapter.HandleSetExceptionBreakpointsRequest(SetExceptionBreakpointsArguments arguments)
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.DebugAdapterBase.HandleProtocolRequest(String requestType, Object requestArgs)
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.DebugAdapterBase.OnProtocolRequestReceived(Object sender, RequestReceivedEventArgs e)
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.DebugProtocol.OnRequestReceived(String command, IRequestResponder responder)
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.DebugAdapterBase.HandleSetExceptionBreakpointsRequestAsync(IRequestResponder`1 responder)
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.DebugAdapterBase.HandleSetExceptionBreakpointsRequestAsync(IRequestResponder`2 responder)
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.DebugAdapterBase.<InitializeProtocolClient>b__5_36(IRequestResponder`2 r)
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.RequestWithResponseInfo`2.InvokeHandler(DebugProtocol protocol, ProtocolRequest request, Object args)
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.DebugProtocol.HandleIncomingRequest(String msg)
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.DebugProtocol.HandleIncomingMessage(String msg)
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.DebugProtocol.ProcessMessageBody()
   at Microsoft.VisualStudio.Shared.VSCodeDebugProtocol.Protocol.DebugProtocol.ReaderThreadProc()

Unlike the old debugger provided by unity,vstuc is not open-source.so it need some decompiling work.

[CosmicBagel]

Breakpoints not working (logs have a null reference exception), but I hacked together a little way to make connecting to unity more consistent (since that port number keeps changing each time you open it)

local vstuc_path = os.getenv("HOME") ..
    "/.vscode/extensions/visualstudiotoolsforunity.vstuc-1.0.1/bin/"
dap.adapters.vstuc = {
    type = 'executable',
    command = 'dotnet',
    args = {
        vstuc_path .. 'UnityDebugAdapter.dll'
    }
}

dap.configurations.cs = {
    {
        name = 'Attach to Unity',
        type = 'vstuc',
        request = 'attach',
        path = vim.fn.getcwd() .. "/Library/EditorInstance.json",
        logFile = vim.env.HOME .. "/vstuc.log",
        endPoint = function()
            local system_obj = vim.system(
                { "dotnet", vstuc_path .. "UnityAttachProbe.dll" })
            local probe_result = system_obj:wait(2000).stdout

            if probe_result == nil or #probe_result == 0 then
                print("No endpoint found (is unity running?)")
                return ""
            end
            local pattern = [["debuggerPort":(%d+)]]
            local port = string.match(probe_result, pattern)

            if port == nil or #port == 0 then
                print("Failed to parse debugger port")
                return ""
            end

            return "127.0.0.1:" .. port
        end,
    }
}

Running UnityAttachProbe.dll gets you output like this:

[{"processId":90141,"address":"127.0.0.1","machine":"msiarch","projectName":"","information":"","profilerPort":0,"debuggerPort":56141,"messagerPort":56143,"unityPlayer":null,"type":"Editor","discoveryType":"Automatic","debuggerEngine":"VSTU","isBackground":false,"isProcessDetection":true,"displayType":"Editor","displayConnection":"Port:56141 (VSTU)"}]

and it will give you nothing if there is no unity instance running