Examine

A drop-in Go package to trace your program automatically.

Caution

Examine is still in very early development

Problem

1. When working on a project I would like to trace execution especially for network requests (incoming and outgoing)
2. The way to do it is either change the code to log these requests or add breakpoints and attach a debugger
3. I would like to Do 1 without doing 2. I would like to just import a package that traces the program network requests

How to use

1. Import Examine to your program with import _ "github.com/emad-elsaid/examine"
2. Build and run your program go build ./cmd/path/to/cmd && ./cmd-name
3. Examine prints traces of your network requests (this can change during development)
4. As Examine pauses programs it will affect performance. and shouldn't be used in production for any case

How it works

1. Examine forks your program
2. Attaches Delve debugger to your program
3. Adds breakpoints to Go standard library
4. Whenever a breakpoint is hit. it'll store relevant information and print them and continue

Known issues

Can't print any variables if the program ran with go run

Turns out go run doesn't include DWARF debugging information. so you have to go build then run the program

Couldn't attach to PID

If you get this message:

ERROR Could not attach to pid 10042: this could be caused by a kernel security setting, try writing "0" to /proc/sys/kernel/yama/ptrace_scope

You need to turn on ptrace_scope in your kernel by

sudo su
echo "0" > /proc/sys/kernel/yama/ptrace_scope