How Can I Detect if the GoLand Debugger is Running in My Go Program?

How to Detect Running GoLand Debugger in a Program

While debugging in managed languages, one might want to disable certain timing behaviors or execute alternative code paths. C# provides System.Diagnostics.Debugger.IsAttached for this purpose. But how do we do this in Go?

An Indirect Solution for Go

Although there's no direct equivalent to Debugger.IsAttached in Go, you can indirectly detect the presence of the debugger using build tags.

Step 1: Create Two Helper Files

• isdelve/delve.go when debugging is enabled:

  // +build delve
  
  package isdelve
  
  const Enabled = true

• isdelve/nodelve.go when debugging is not enabled:

  // +build !delve
  
  package isdelve
  
  const Enabled = false

Step 2: Check for the Build Tag in Your Main Program

import (
    "fmt"
    "isdelve"
)

func main() {
    fmt.Println("Debugging:", isdelve.Enabled)
}

Step 3: Configure Goland

In GoLand's "Run/Debug Configurations" window, under "Go tool arguments," add:

-tags=delve

When debugging with Goland, Enabled will be set to true. Otherwise, it will be false.

Step 4: Alternative Method Using DLV

If you prefer to use dlv directly, use:

dlv debug --build-flags='-tags=delve' a.go

This will set Enabled to true.

Step 5: Dynamic Variable Setting

Alternatively, you can use the dlv command to set a variable manually after starting the debugger, as follows:

> set enabled true

This sets a global enabled variable that you can check in your code.

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