Go get stacktrace

main.go

func getStack(skip int) string {
        buffer := make([]byte, 1024)
        for {
                written := runtime.Stack(buffer, false)
                if written < len(buffer) {
                        // call stack contains of goroutine number and set of calls
                        //   goroutine NN [running]:
                        //   github.com/user/project.(*Type).MethodFoo()
                        //        path/to/src.go:line
                        //   github.com/user/project.MethodBar()
                        //        path/to/src.go:line
                        // so if we need to skip 2 calls than we must split stack on
                        // following parts:
                        //   2(call)+2(call path)+1(goroutine header) + 1(callstack)
                        // and extract first and last parts of resulting slice
                        stack := strings.SplitN(string(buffer[:written]), "\n", skip*2+2)
                        return stack[0] + "\n" + stack[skip*2+1]
                }

                buffer = make([]byte, 2*len(buffer))
        }
}