symbolize regularly to accelarate cover page loading

pkg/manager/http.go

@@ -113,6 +113,17 @@ func (serv *HTTPServer) Serve(ctx context.Context) error {
 	// Browsers like to request this, without special handler this goes to / handler.
 	handle("/favicon.ico", func(w http.ResponseWriter, r *http.Request) {})
 
+	go func() {
+		webAddr := mgrconfig.PublicWebAddr(serv.Cfg.HTTP)
+		urlStr := fmt.Sprintf("%v/subsystemcover", webAddr)
+		timer := time.NewTicker(10 * time.Minute)
+		defer timer.Stop()
+		for range timer.C {
+			log.Logf(2, "accessing %v to symbolize regularly", urlStr)
+			http.Get(urlStr)
+		}
+	}()
+
 	log.Logf(0, "serving http on http://%v", serv.Cfg.HTTP)
 	server := &http.Server{Addr: serv.Cfg.HTTP}
 	go func() {

pkg/mgrconfig/load.go

@@ -6,13 +6,15 @@ package mgrconfig
 import (
 	"bytes"
 	"fmt"
+	"net"
 	"os"
 	"path/filepath"
 	"regexp"
 	"runtime"
 	"strings"
 
 	"github.com/google/syzkaller/pkg/config"
+	"github.com/google/syzkaller/pkg/gce"
 	"github.com/google/syzkaller/pkg/osutil"
 	"github.com/google/syzkaller/pkg/vminfo"
 	"github.com/google/syzkaller/prog"
@@ -499,3 +501,19 @@ func MatchSyscall(name, pattern string) bool {
 	}
 	return false
 }
+
+func PublicWebAddr(addr string) string {
+	if addr == "" {
+		return ""
+	}
+	_, port, err := net.SplitHostPort(addr)
+	if err == nil && port != "" {
+		if host, err := os.Hostname(); err == nil {
+			addr = net.JoinHostPort(host, port)
+		}
+		if GCE, err := gce.NewContext(""); err == nil {
+			addr = net.JoinHostPort(GCE.ExternalIP, port)
+		}
+	}
+	return "http://" + addr
+}

syz-manager/hub.go

@@ -155,7 +155,7 @@ func (hc *HubConnector) connect(corpus []*corpus.Item) (*rpctype.RPCClient, erro
 	if err != nil {
 		return nil, err
 	}
-	http := publicWebAddr(hc.cfg.HTTP)
+	http := mgrconfig.PublicWebAddr(hc.cfg.HTTP)
 	a := &rpctype.HubConnectArgs{
 		Client:  hc.cfg.HubClient,
 		Key:     key,

syz-manager/manager.go

@@ -29,7 +29,6 @@ import (
 	"github.com/google/syzkaller/pkg/flatrpc"
 	"github.com/google/syzkaller/pkg/fuzzer"
 	"github.com/google/syzkaller/pkg/fuzzer/queue"
-	"github.com/google/syzkaller/pkg/gce"
 	"github.com/google/syzkaller/pkg/ifaceprobe"
 	"github.com/google/syzkaller/pkg/image"
 	"github.com/google/syzkaller/pkg/log"
@@ -1376,7 +1375,7 @@ func (mgr *Manager) trackUsedFiles() {
 }
 
 func (mgr *Manager) dashboardReporter() {
-	webAddr := publicWebAddr(mgr.cfg.HTTP)
+	webAddr := mgrconfig.PublicWebAddr(mgr.cfg.HTTP)
 	triageInfoSent := false
 	var lastFuzzingTime time.Duration
 	var lastCrashes, lastSuppressedCrashes, lastExecs uint64
@@ -1463,19 +1462,3 @@ func (mgr *Manager) CoverageFilter(modules []*vminfo.KernelModule) ([]uint64, er
 	}
 	return pcs, nil
 }
-
-func publicWebAddr(addr string) string {
-	if addr == "" {
-		return ""
-	}
-	_, port, err := net.SplitHostPort(addr)
-	if err == nil && port != "" {
-		if host, err := os.Hostname(); err == nil {
-			addr = net.JoinHostPort(host, port)
-		}
-		if GCE, err := gce.NewContext(""); err == nil {
-			addr = net.JoinHostPort(GCE.ExternalIP, port)
-		}
-	}
-	return "http://" + addr
-}