Test program for playing with pprof's heap profiler.

leak.go

package main

import (
	"log"
	"math/rand"
	"net/http"
	_ "net/http/pprof"
	"os"
	"os/signal"
	"runtime/debug"
	"time"
)

var store [][]byte

func storeReference(b []byte) {
	store = append(store, b)
}

func removeReferences() {
	store = nil
	debug.FreeOSMemory()
}

func escapedAllocation() []byte {
	b := make([]byte, 65536)
	rand.Read(b)
	return b
}

func leak() {
	sigint := make(chan os.Signal, 1)
	signal.Notify(sigint, os.Interrupt)
	for {
		if done(sigint) {
			log.Print("clearing all references")
			removeReferences()
			break
		}
		storeReference(escapedAllocation())
		time.Sleep(time.Millisecond)
	}
	<-sigint
	os.Exit(0)
}

func done(sigint chan os.Signal) bool {
	select {
	case <-sigint:
		return true
	default:
		return false
	}
}

func main() {
	go leak()
	log.Print("pprof listening on :8080")
	log.Fatal(http.ListenAndServe(":8080", nil))
}