Golang 函数并发编程的调试技巧有哪些？

func f() {
    for i := 0; i < 10; i++ {
        debug.Print(i, ",")
    }
}

func main() {
    f()
    fmt.Println()
}

0,1,2,3,4,5,6,7,8,9,

package main

import (
    "fmt"
    "sync"
    "sync/atomic"
)

var x int64
var wg sync.WaitGroup

func main() {
    wg.Add(1)
    go func() {
        defer wg.Done()
        for i := 0; i < 1000000; i++ {
            atomic.AddInt64(&x, 1)
        }
    }()
    wg.Add(1)
    go func() {
        defer wg.Done()
        for i := 0; i < 1000000; i++ {
            atomic.AddInt64(&x, -1)
        }
    }()
    wg.Wait()
    fmt.Println(x)
}

go tool pprof -alloc_space http://localhost:8080/debug/pprof/profile

dlv debug

package main

import (
    "fmt"
    "time"
)

func main() {
    for i := 0; i < 10; i++ {
        go func(i int) {
            time.Sleep(time.Second)
            fmt.Println(i)
        }(i)
    }
}

fatal error: all goroutines are asleep - deadlock!
goroutine 1 [running]:
main.main()
    /tmp/example.go:15 +0x115
exit status 2

func main() {
    for i := 0; i < 10; i++ {
        go func(i int) {
            time.Sleep(time.Second)
            debug.Print(i, ",")
            fmt.Println(i)
        }(i)
    }
}

0,1,2,3,4,5,6,7,8,9,fatal error: all goroutines are asleep - deadlock!
goroutine 1 [running]:
main.main()
    /tmp/example.go:22 +0x115
exit status 2