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Get goroutine id for debugging
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| package main | |
| // 80195: doc/faq: explain why goroutines are anonymous | https://go-review.googlesource.com/c/go/+/80195 | |
| // faq: document why there is no way to get a goroutine ID | https://github.com/golang/go/issues/22770 | |
| import ( | |
| "fmt" | |
| "runtime" | |
| "strconv" | |
| "strings" | |
| "sync" | |
| ) | |
| func goid() int { | |
| var buf [64]byte | |
| n := runtime.Stack(buf[:], false) | |
| idField := strings.Fields(strings.TrimPrefix(string(buf[:n]), "goroutine "))[0] | |
| id, err := strconv.Atoi(idField) | |
| if err != nil { | |
| panic(fmt.Sprintf("cannot get goroutine id: %v", err)) | |
| } | |
| return id | |
| } | |
| func main() { | |
| fmt.Println("main", goid()) | |
| var wg sync.WaitGroup | |
| for i := 0; i < 10; i++ { | |
| i := i | |
| wg.Add(1) | |
| go func() { | |
| defer wg.Done() | |
| fmt.Println(i, goid()) | |
| }() | |
| } | |
| wg.Wait() | |
| } |
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