GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/matt/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/matt/gocode"
GOPROXY=""
GORACE=""
GOROOT="/Users/matt/repos/go"
GOTMPDIR=""
GOTOOLDIR="/Users/matt/repos/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/l_/ldzhcfsd1g3fg8bdzfgrc_840000gn/T/go-build487155815=/tmp/go-build -gno-record-gcc-switches -fno-common"

package main

import (
	"os"
	"os/signal"
	"runtime/debug"
	"syscall"
	"time"
)

type leakyFoo struct {
	index int
}

// Leaky program writes heapdump to stdout on SIGUSR2
func main() {
	setupHeapdumpHandler()

	// Leak some structs forever
	leak := []*leakyFoo{}

	for i := 0; ; i++ {
		leak = append(leak, &leakyFoo{
			index: i,
		})
		time.Sleep(100000000)
	}
}

func setupHeapdumpHandler() {
	go func() {
		usr2sig := make(chan os.Signal, 1)
		signal.Notify(usr2sig, syscall.SIGUSR2)
		for {
			<-usr2sig
			debug.WriteHeapDump(os.Stdout.Fd())
		}
	}()
}