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package utils
import (
"fmt"
"net"
"os"
"regexp"
"runtime"
"runtime/debug"
"strings"
"sync"
"sync/atomic"
"time"
)
var connsCount int64
var printer sync.Once
var mu sync.Mutex
var createdStacks = make(map[string]int)
var reg = regexp.MustCompile(`0[xX][0-9a-fA-F]+`)
type connCounting struct {
net.Conn
closed bool
}
// Socket leak debug net.Conn wrapper
func NewCountingConn(conn net.Conn) net.Conn {
c := &connCounting{
Conn: conn,
closed: false,
}
runtime.SetFinalizer(c, func(cc *connCounting) {
if !cc.closed {
atomic.AddInt64(&connsCount, -1)
cc.closed = true
}
})
atomic.AddInt64(&connsCount, 1)
printer.Do(func() {
go func() {
t := time.NewTicker(time.Second)
f, err := os.Create("sockets.ticker")
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create sockets.ticker file: %v\n", err)
return
}
for {
<-t.C
fmt.Fprintf(f, "Connections count: %v\n", atomic.LoadInt64(&connsCount))
f.Sync()
}
}()
})
st := string(debug.Stack())
st = st[strings.Index(st, "\n")+1:]
st = reg.ReplaceAllString(st, "")
mu.Lock()
_, has := createdStacks[st]
if !has {
createdStacks[st] = 1
} else {
createdStacks[st]++
}
printStacks()
mu.Unlock()
return c
}
func (c *connCounting) Close() error {
if !c.closed {
atomic.AddInt64(&connsCount, -1)
c.closed = true
}
return c.Conn.Close()
}
func printStacks() {
f, _ := os.Create("sockets.created")
for s, c := range createdStacks {
fmt.Fprintf(f, "%v:\n%v\n\n", c, s)
}
f.Sync()
f.Close()
}
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