Xdumpgo Tutorial Link

Since xdumpgo is not a mainstream standard command, this report assumes it refers to a Go-oriented core dump inspection utility (similar to gdump or an extended go tool objdump). If you meant something else (e.g., a custom/internal tool), please clarify. Otherwise, this tutorial-style report will be useful for practical scenarios.

3. Generating a Core Dump for Practice

Run a crashing Go program:

// crash.go
package main
func main() 
ch := make(chan int)
close(ch)
ch <- 1 // panic: send on closed channel
 xdumpgo tutorial

Compile and run with core dump:

go build -o crash crash.go
export GOTRACEBACK=crash
./crash
# core file will be created (e.g., core.pid)

5. Use Cases

API Logging: Log the exact state of a request object before sending it to a third-party API.
Forensics: Analyze the state of an object during a panic recovery.
Configuration Validation: Verify that your config structs are loading environment variables correctly.

8. Quick Reference Card

| Task | xdumpgo command | Delve alternative | |------|----------------|-------------------| | Load core | xdumpgo info | dlv core | | Goroutines list | xdumpgo goroutines | goroutines | | Stack trace | xdumpgo stack -g N | bt | | Heap stats | xdumpgo heap | heap | | Variables | xdumpgo globals | vars |

Best Practices & Tips

Alias common commands
Add to ~/.bashrc:

alias hex='xdumpgo -c -C'
alias small='xdumpgo -n 128'

Use with grep for patterns

xdumpgo -C firmware.bin | grep -i "secret"

Pipe to clipboard for analysis

xdumpgo -x -n 512 data.bin | pbcopy   # macOS

Profile memory usage
For huge files, always use StreamDumper, not NewDumper.

10. Next steps and learning resources

Learn Go runtime internals (goroutine scheduling, GC).
Combine xdumpgo with pprof, delve, and GDB for deeper post-mortem.
Add runtime/pprof endpoints or periodic snapshots in staging to catch regressions early.