They leak if end up either blocked forever on I/O like channel communication or fall into infinite loops. Even blocked goroutine consumes resources so the program may use more memory than actually needed or eventually run out of memory and crash
Sending to a channel without receiver
channel部分的操作
import "github.com/google/gops/agent"
...
if err := agent.Start(); err != nil {
log.Fatal(err)
}
time.Sleep(time.Hour)
> ./bin/gops
12365 gops (/Users/mlowicki/projects/golang/spec/bin/gops)
12336* lab (/Users/mlowicki/projects/golang/spec/bin/lab)
> ./bin/gops vitals -p=12336
goroutines: 14
OS threads: 9
GOMAXPROCS: 4
num CPU: 4通过gops的引入
runtime.Stack的方式
Stack formats a stack trace of the calling goroutine into buf and returns the number of bytes written to buf. If all is true, Stack formats stack traces of all other goroutines into buf after the trace for the current goroutine.