How to debug Golang functions using remote debugging?

The steps to use remote debugging in Golang functions are as follows: Enable listening in the program: import _ "net/http/pprof" Build and run the program: go run -listen=0.0.0.0:1234 main.go is set in the IDE Debugger, connected to a running program. Set breakpoints. Run the debugger, attached to the running program.

How to use remote debugging in Golang functions

Remote debugging allows you to do it from an IDE or Examine a running Golang application in the debugger. This is especially useful for debugging difficult-to-reproduce problems or distributed systems.

Prerequisites:

• Install Go 1.13 or higher
• An IDE with debugging capabilities (such as IntelliJ IDEA or Visual Studio Code )

Steps:

1. Enable listen listening

In the program to be debugged, add a line Code to enable listening to the remote debugger:

import _ "net/http/pprof"

2. Build and run the program

Build the target program and run it with the -listen flag It, specifies the port to listen on:

go run -listen=0.0.0.0:1234 main.go

3. Set up the debugger

In the IDE, set the debug configuration to connect to the running program:

• IntelliJ IDEA： Run > Attach to Process...
• Visual Studio Code： Debug > Attach and configure

Configure connection details:

• Host: The hostname or IP address where the program is running
• Port: The port you specified in step 2 (e.g. 1234)

4. Interrupt execution

In the IDE, set the breakpoint to be debugged.

5. Debugging

Run the debugger to attach to a running program. The IDE will pause execution at the breakpoint. You can inspect variables, set watch expressions, and step through code.

Practical case:

Debugging a complex application containing multiple microservices in a distributed system:

• In each microservice Enable remote debugging in .
• Use IDE to connect to each microservice separately.
• Set breakpoints across microservices and step through them as needed.

Trace the execution flow across services and diagnose complex interactions of distributed systems through remote debugging.

Note:

• Remote debugging may have a slight impact on the performance of your application.
• Make sure to disable remote debugging listening in production environments to avoid security issues.

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