/
runtest.go
312 lines (295 loc) · 7.8 KB
/
runtest.go
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// Copyright 2018 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
// Runtest runs syzkaller test programs in sys/*/test/*. Start as:
// $ syz-runtest -config manager.config
// Also see pkg/runtest docs.
package main
import (
"errors"
"flag"
"fmt"
"io/ioutil"
"log"
"net"
"os"
"path/filepath"
"strings"
"sync"
"time"
"github.com/google/syzkaller/pkg/instance"
"github.com/google/syzkaller/pkg/mgrconfig"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/pkg/report"
"github.com/google/syzkaller/pkg/rpctype"
"github.com/google/syzkaller/pkg/runtest"
"github.com/google/syzkaller/prog"
_ "github.com/google/syzkaller/sys"
"github.com/google/syzkaller/sys/targets"
"github.com/google/syzkaller/vm"
)
var (
flagConfig = flag.String("config", "", "manager config")
flagDebug = flag.Bool("debug", false, "debug mode")
flagTests = flag.String("tests", "", "prefix to match test file names")
)
func main() {
flag.Parse()
cfg, err := mgrconfig.LoadFile(*flagConfig)
if err != nil {
log.Fatal(err)
}
target, err := prog.GetTarget(cfg.TargetOS, cfg.TargetArch)
if err != nil {
log.Fatal(err)
}
testDir := filepath.Join(cfg.Syzkaller, "sys", target.OS, "test")
if err := testParsing(target, testDir); err != nil {
log.Fatal(err)
}
vmPool, err := vm.Create(cfg, *flagDebug)
if err != nil {
log.Fatal(err)
}
reporter, err := report.NewReporter(cfg)
if err != nil {
log.Fatal(err)
}
osutil.MkdirAll(cfg.Workdir)
mgr := &Manager{
cfg: cfg,
target: target,
vmPool: vmPool,
reporter: reporter,
debug: *flagDebug,
requests: make(chan *runtest.RunRequest, 2*vmPool.Count()),
checkResultC: make(chan *rpctype.CheckArgs, 1),
checkResultReady: make(chan bool),
vmStop: make(chan bool),
reqMap: make(map[int]*runtest.RunRequest),
lastReq: make(map[string]int),
}
s, err := rpctype.NewRPCServer(cfg.RPC, "Manager", mgr)
if err != nil {
log.Fatalf("failed to create rpc server: %v", err)
}
mgr.port = s.Addr().(*net.TCPAddr).Port
go s.Serve()
var wg sync.WaitGroup
wg.Add(vmPool.Count())
fmt.Printf("booting VMs...\n")
for i := 0; i < vmPool.Count(); i++ {
i := i
go func() {
defer wg.Done()
name := fmt.Sprintf("vm-%v", i)
for {
rep, err := mgr.boot(name, i)
if err != nil {
log.Fatal(err)
}
if rep == nil {
return
}
if err := mgr.finishRequest(name, rep); err != nil {
log.Fatal(err)
}
}
}()
}
mgr.checkResult = <-mgr.checkResultC
close(mgr.checkResultReady)
enabledCalls := make(map[string]map[*prog.Syscall]bool)
for sandbox, ids := range mgr.checkResult.EnabledCalls {
calls := make(map[*prog.Syscall]bool)
for _, id := range ids {
calls[target.Syscalls[id]] = true
}
enabledCalls[sandbox] = calls
}
for _, feat := range mgr.checkResult.Features.Supported() {
fmt.Printf("%-24v: %v\n", feat.Name, feat.Reason)
}
for sandbox, calls := range enabledCalls {
if sandbox == "" {
sandbox = "no"
}
fmt.Printf("%-24v: %v calls enabled\n", sandbox+" sandbox", len(calls))
}
ctx := &runtest.Context{
Dir: testDir,
Target: target,
Features: mgr.checkResult.Features,
EnabledCalls: enabledCalls,
Requests: mgr.requests,
LogFunc: func(text string) { fmt.Println(text) },
Verbose: false,
Debug: *flagDebug,
Tests: *flagTests,
}
err = ctx.Run()
close(vm.Shutdown)
wg.Wait()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
type Manager struct {
cfg *mgrconfig.Config
target *prog.Target
vmPool *vm.Pool
reporter report.Reporter
requests chan *runtest.RunRequest
checkResult *rpctype.CheckArgs
checkResultReady chan bool
checkResultC chan *rpctype.CheckArgs
vmStop chan bool
port int
debug bool
reqMu sync.Mutex
reqSeq int
reqMap map[int]*runtest.RunRequest
lastReq map[string]int
}
func (mgr *Manager) boot(name string, index int) (*report.Report, error) {
inst, err := mgr.vmPool.Create(index)
if err != nil {
return nil, fmt.Errorf("failed to create instance: %v", err)
}
defer inst.Close()
fwdAddr, err := inst.Forward(mgr.port)
if err != nil {
return nil, fmt.Errorf("failed to setup port forwarding: %v", err)
}
fuzzerBin, err := inst.Copy(mgr.cfg.SyzFuzzerBin)
if err != nil {
return nil, fmt.Errorf("failed to copy binary: %v", err)
}
// If SyzExecutorCmd is provided, it means that syz-executor is already in
// the image, so no need to copy it.
executorCmd := targets.Get(mgr.cfg.TargetOS, mgr.cfg.TargetArch).SyzExecutorCmd
if executorCmd == "" {
executorCmd, err = inst.Copy(mgr.cfg.SyzExecutorBin)
if err != nil {
return nil, fmt.Errorf("failed to copy binary: %v", err)
}
}
cmd := instance.FuzzerCmd(fuzzerBin, executorCmd, name,
mgr.cfg.TargetOS, mgr.cfg.TargetArch, fwdAddr, mgr.cfg.Sandbox, mgr.cfg.Procs, 0,
mgr.cfg.Cover, false, mgr.debug, false, true)
outc, errc, err := inst.Run(time.Hour, mgr.vmStop, cmd)
if err != nil {
return nil, fmt.Errorf("failed to run fuzzer: %v", err)
}
rep := inst.MonitorExecution(outc, errc, mgr.reporter, vm.ExitNormal)
return rep, nil
}
func (mgr *Manager) finishRequest(name string, rep *report.Report) error {
mgr.reqMu.Lock()
defer mgr.reqMu.Unlock()
lastReq := mgr.lastReq[name]
req := mgr.reqMap[lastReq]
if lastReq == 0 || req == nil {
return fmt.Errorf("vm crash: %v\n%s\n%s", rep.Title, rep.Report, rep.Output)
}
delete(mgr.reqMap, lastReq)
delete(mgr.lastReq, name)
req.Err = fmt.Errorf("%v", rep.Title)
req.Output = rep.Report
if len(req.Output) == 0 {
req.Output = rep.Output
}
close(req.Done)
return nil
}
func (mgr *Manager) Connect(a *rpctype.ConnectArgs, r *rpctype.ConnectRes) error {
r.GitRevision = prog.GitRevision
r.TargetRevision = mgr.target.Revision
r.AllSandboxes = true
select {
case <-mgr.checkResultReady:
r.CheckResult = mgr.checkResult
default:
}
return nil
}
func (mgr *Manager) Check(a *rpctype.CheckArgs, r *int) error {
if a.Error != "" {
log.Fatalf("machine check: %v", a.Error)
}
select {
case mgr.checkResultC <- a:
default:
}
return nil
}
func (mgr *Manager) Poll(a *rpctype.RunTestPollReq, r *rpctype.RunTestPollRes) error {
req := <-mgr.requests
if req == nil {
return nil
}
mgr.reqMu.Lock()
if mgr.lastReq[a.Name] != 0 {
log.Fatalf("double poll req from %v", a.Name)
}
mgr.reqSeq++
r.ID = mgr.reqSeq
mgr.reqMap[mgr.reqSeq] = req
mgr.lastReq[a.Name] = mgr.reqSeq
mgr.reqMu.Unlock()
if req.Bin != "" {
data, err := ioutil.ReadFile(req.Bin)
if err != nil {
log.Fatalf("failed to read bin file: %v", err)
}
r.Bin = data
return nil
}
r.Prog = req.P.Serialize()
r.Cfg = req.Cfg
r.Opts = req.Opts
r.Repeat = req.Repeat
return nil
}
func (mgr *Manager) Done(a *rpctype.RunTestDoneArgs, r *int) error {
mgr.reqMu.Lock()
lastReq := mgr.lastReq[a.Name]
if lastReq != a.ID {
log.Fatalf("wrong done id %v from %v", a.ID, a.Name)
}
req := mgr.reqMap[a.ID]
delete(mgr.reqMap, a.ID)
delete(mgr.lastReq, a.Name)
mgr.reqMu.Unlock()
if req == nil {
log.Fatalf("got done request for unknown id %v", a.ID)
}
req.Output = a.Output
req.Info = a.Info
if a.Error != "" {
req.Err = errors.New(a.Error)
}
close(req.Done)
return nil
}
func testParsing(target *prog.Target, dir string) error {
files, err := ioutil.ReadDir(dir)
if err != nil {
return fmt.Errorf("failed to read %v: %v", dir, err)
}
for _, file := range files {
if strings.HasSuffix(file.Name(), "~") {
continue
}
if strings.HasSuffix(file.Name(), ".swp") {
continue
}
if !strings.HasPrefix(file.Name(), *flagTests) {
continue
}
if err := runtest.TestParseProg(target, dir, file.Name()); err != nil {
return err
}
}
return nil
}