Hands-On High Performance with Go

GOTRACEBACK

GOTRACEBACK allows you to control the generated output from a Go program with unexpected runtime conditions or unrecovered panic states. Setting a GOTRACEBACK variable will allow you to see more or less granular information about the goroutines that are instantiated for your specific error or panic. An example of panic from a channel/goroutine interrupt is as follows:

package mainimport (    "time")func main() {    c := make(chan bool, 1)    go panicRoutine(c)    for i := 0; i < 2; i++ {       <-c    }}func panicRoutine(c chan bool) {    time.Sleep(100 * time.Millisecond)    panic("Goroutine Panic")    c <- true}

If we tweak the GOTRACEBACK variable in our output, we will see different varying levels of stack trace. Setting GOTRACEBACK=none or GOTRACEBACK=0 ...