/
jobs.go
278 lines (259 loc) · 7.78 KB
/
jobs.go
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// Copyright 2017 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.
package main
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"time"
"github.com/google/syzkaller/dashboard/dashapi"
"github.com/google/syzkaller/pkg/build"
"github.com/google/syzkaller/pkg/instance"
"github.com/google/syzkaller/pkg/log"
"github.com/google/syzkaller/pkg/mgrconfig"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/pkg/vcs"
)
type JobProcessor struct {
name string
managers []*Manager
dash *dashapi.Dashboard
syzkallerRepo string
syzkallerBranch string
}
func newJobProcessor(cfg *Config, managers []*Manager) *JobProcessor {
jp := &JobProcessor{
name: fmt.Sprintf("%v-job", cfg.Name),
managers: managers,
syzkallerRepo: cfg.SyzkallerRepo,
syzkallerBranch: cfg.SyzkallerBranch,
}
if cfg.DashboardAddr != "" && cfg.DashboardClient != "" {
jp.dash = dashapi.New(cfg.DashboardClient, cfg.DashboardAddr, cfg.DashboardKey)
}
return jp
}
func (jp *JobProcessor) loop(stop chan struct{}) {
if jp.dash == nil {
return
}
ticker := time.NewTicker(time.Minute)
defer ticker.Stop()
for {
select {
case <-ticker.C:
jp.poll()
case <-stop:
log.Logf(0, "job loop stopped")
return
}
}
}
func (jp *JobProcessor) poll() {
var names []string
for _, mgr := range jp.managers {
names = append(names, mgr.name)
}
req, err := jp.dash.JobPoll(names)
if err != nil {
jp.Errorf("failed to poll jobs: %v", err)
return
}
if req.ID == "" {
return
}
var mgr *Manager
for _, m := range jp.managers {
if m.name == req.Manager {
mgr = m
break
}
}
if mgr == nil {
jp.Errorf("got job for unknown manager: %v", req.Manager)
return
}
job := &Job{
req: req,
mgr: mgr,
}
log.Logf(0, "starting job %v for manager %v on %v/%v",
req.ID, req.Manager, req.KernelRepo, req.KernelBranch)
resp := jp.process(job)
log.Logf(0, "done job %v: commit %v, crash %q, error: %s",
resp.ID, resp.Build.KernelCommit, resp.CrashTitle, resp.Error)
if err := jp.dash.JobDone(resp); err != nil {
jp.Errorf("failed to mark job as done: %v", err)
return
}
}
type Job struct {
req *dashapi.JobPollResp
resp *dashapi.JobDoneReq
mgr *Manager
}
func (jp *JobProcessor) process(job *Job) *dashapi.JobDoneReq {
req, mgr := job.req, job.mgr
build := dashapi.Build{
Manager: mgr.name,
ID: req.ID,
OS: mgr.managercfg.TargetOS,
Arch: mgr.managercfg.TargetArch,
VMArch: mgr.managercfg.TargetVMArch,
CompilerID: mgr.compilerID,
KernelRepo: req.KernelRepo,
KernelBranch: req.KernelBranch,
KernelCommit: "[unknown]",
SyzkallerCommit: "[unknown]",
}
job.resp = &dashapi.JobDoneReq{
ID: req.ID,
Build: build,
}
required := []struct {
name string
ok bool
}{
{"kernel repository", req.KernelRepo != ""},
{"kernel branch", req.KernelBranch != ""},
{"kernel config", len(req.KernelConfig) != 0},
{"syzkaller commit", req.SyzkallerCommit != ""},
{"reproducer options", len(req.ReproOpts) != 0},
{"reproducer program", len(req.ReproSyz) != 0},
}
for _, req := range required {
if !req.ok {
job.resp.Error = []byte(req.name + " is empty")
jp.Errorf("%s", job.resp.Error)
return job.resp
}
}
// TODO(dvyukov): this will only work for qemu/gce,
// because e.g. adb requires unique device IDs and we can't use what
// manager already uses. For qemu/gce this is also bad, because we
// override resource limits specified in config (e.g. can OOM), but works.
switch typ := mgr.managercfg.Type; typ {
case "gce", "qemu":
default:
job.resp.Error = []byte(fmt.Sprintf("testing is not yet supported for %v machine type.", typ))
jp.Errorf("%s", job.resp.Error)
return job.resp
}
if err := jp.test(job); err != nil {
job.resp.Error = []byte(err.Error())
}
return job.resp
}
func (jp *JobProcessor) test(job *Job) error {
kernelBuildSem <- struct{}{}
defer func() { <-kernelBuildSem }()
req, resp, mgr := job.req, job.resp, job.mgr
dir := osutil.Abs(filepath.Join("jobs", mgr.managercfg.TargetOS))
kernelDir := filepath.Join(dir, "kernel")
mgrcfg := new(mgrconfig.Config)
*mgrcfg = *mgr.managercfg
mgrcfg.Name += "-job"
mgrcfg.Workdir = filepath.Join(dir, "workdir")
mgrcfg.KernelSrc = kernelDir
mgrcfg.Syzkaller = filepath.Join(dir, "gopath", "src", "github.com", "google", "syzkaller")
os.RemoveAll(mgrcfg.Workdir)
defer os.RemoveAll(mgrcfg.Workdir)
env, err := instance.NewEnv(mgrcfg)
if err != nil {
return err
}
log.Logf(0, "job: building syzkaller on %v...", req.SyzkallerCommit)
resp.Build.SyzkallerCommit = req.SyzkallerCommit
if err := env.BuildSyzkaller(jp.syzkallerRepo, req.SyzkallerCommit); err != nil {
return err
}
log.Logf(0, "job: fetching kernel...")
repo, err := vcs.NewRepo(mgrcfg.TargetOS, mgrcfg.Type, kernelDir)
if err != nil {
return fmt.Errorf("failed to create kernel repo: %v", err)
}
var kernelCommit *vcs.Commit
if vcs.CheckCommitHash(req.KernelBranch) {
kernelCommit, err = repo.CheckoutCommit(req.KernelRepo, req.KernelBranch)
if err != nil {
return fmt.Errorf("failed to checkout kernel repo %v on commit %v: %v",
req.KernelRepo, req.KernelBranch, err)
}
resp.Build.KernelBranch = ""
} else {
kernelCommit, err = repo.CheckoutBranch(req.KernelRepo, req.KernelBranch)
if err != nil {
return fmt.Errorf("failed to checkout kernel repo %v/%v: %v",
req.KernelRepo, req.KernelBranch, err)
}
}
resp.Build.KernelCommit = kernelCommit.Hash
resp.Build.KernelCommitTitle = kernelCommit.Title
resp.Build.KernelCommitDate = kernelCommit.Date
if err := build.Clean(mgrcfg.TargetOS, mgrcfg.TargetVMArch, mgrcfg.Type, kernelDir); err != nil {
return fmt.Errorf("kernel clean failed: %v", err)
}
if len(req.Patch) != 0 {
if err := vcs.Patch(kernelDir, req.Patch); err != nil {
return err
}
}
log.Logf(0, "job: building kernel...")
if err := env.BuildKernel(mgr.mgrcfg.Compiler, mgr.mgrcfg.Userspace, mgr.mgrcfg.KernelCmdline,
mgr.mgrcfg.KernelSysctl, req.KernelConfig); err != nil {
return err
}
resp.Build.KernelConfig, err = ioutil.ReadFile(filepath.Join(mgrcfg.KernelSrc, ".config"))
if err != nil {
return fmt.Errorf("failed to read config file: %v", err)
}
log.Logf(0, "job: testing...")
results, err := env.Test(3, req.ReproSyz, req.ReproOpts, req.ReproC)
if err != nil {
return err
}
// We can have transient errors and other errors of different types.
// We need to avoid reporting transient "failed to boot" or "failed to copy binary" errors.
// If any of the instances crash during testing, we report this with the highest priority.
// Then if any of the runs succeed, we report that (to avoid transient errors).
// If all instances failed to boot, then we report one of these errors.
anySuccess := false
var anyErr, testErr error
for _, res := range results {
if res == nil {
anySuccess = true
continue
}
anyErr = res
switch err := res.(type) {
case *instance.TestError:
// We should not put rep into resp.CrashTitle/CrashReport,
// because that will be treated as patch not fixing the bug.
if rep := err.Report; rep != nil {
testErr = fmt.Errorf("%v\n\n%s\n\n%s", rep.Title, rep.Report, rep.Output)
} else {
testErr = fmt.Errorf("%v\n\n%s", err.Title, err.Output)
}
case *instance.CrashError:
resp.CrashTitle = err.Report.Title
resp.CrashReport = err.Report.Report
resp.CrashLog = err.Report.Output
return nil
}
}
if anySuccess {
return nil
}
if testErr != nil {
return testErr
}
return anyErr
}
// Errorf logs non-fatal error and sends it to dashboard.
func (jp *JobProcessor) Errorf(msg string, args ...interface{}) {
log.Logf(0, "job: "+msg, args...)
if jp.dash != nil {
jp.dash.LogError(jp.name, msg, args...)
}
}