52 type env struct {  struct
56 	inst      *instance.Env
71 	env := &env{
76 		env.log("searching for fixing commit since %v", cfg.Kernel.Commit)
78 		env.log("searching for guilty commit starting from %v", cfg.Kernel.Commit)
81 	res, err := env.bisect()
82 	env.log("revisions tested: %v, total time: %v (build: %v, test: %v)",
83 		env.numTests, time.Since(start), env.buildTime, env.testTime)
85 		env.log("error: %v", err)
89 		env.log("the crash is still unfixed")
96 	env.log("first %v commit: %v %v", what, res.Hash, res.Title)
97 	env.log("cc: %q", res.CC)
101 func (env *env) bisect() (*vcs.Commit, error) {  argument
102 	cfg := env.cfg
104 	if env.inst, err = instance.NewEnv(&cfg.Manager); err != nil {
107 	if env.head, err = env.repo.Poll(cfg.Kernel.Repo, cfg.Kernel.Branch); err != nil {
114 	env.log("building syzkaller on %v", cfg.Syzkaller.Commit)
115 	if err := env.inst.BuildSyzkaller(cfg.Syzkaller.Repo, cfg.Syzkaller.Commit); err != nil {
118 	if _, err := env.repo.SwitchCommit(cfg.Kernel.Commit); err != nil {
121 	if res, err := env.test(); err != nil {
126 	res, bad, good, err := env.commitRange()
136 	return env.repo.Bisect(bad, good, cfg.Trace, func() (vcs.BisectResult, error) {
137 		res, err := env.test()
149 func (env *env) commitRange() (*vcs.Commit, string, string, error) {  argument
150 	if env.cfg.Fix {
151 		return env.commitRangeForFix()
153 	return env.commitRangeForBug()
156 func (env *env) commitRangeForFix() (*vcs.Commit, string, string, error) {  argument
157 	env.log("testing current HEAD %v", env.head.Hash)
158 	if _, err := env.repo.SwitchCommit(env.head.Hash); err != nil {
161 	res, err := env.test()
168 	return nil, env.head.Hash, env.cfg.Kernel.Commit, nil
171 func (env *env) commitRangeForBug() (*vcs.Commit, string, string, error) {  argument
172 	cfg := env.cfg
173 	tags, err := env.repo.PreviousReleaseTags(cfg.Kernel.Commit)
191 		env.log("testing release %v", tag)
192 		commit, err := env.repo.SwitchCommit(tag)
196 		res, err := env.test()
213 func (env *env) test() (vcs.BisectResult, error) {  argument
214 	cfg := env.cfg
215 	env.numTests++
216 	current, err := env.repo.HeadCommit()
220 	be, err := env.buildEnvForCommit(current.Hash)
228 	env.log("testing commit %v with %v", current.Hash, compilerID)
234 	err = env.inst.BuildKernel(be.compiler, cfg.Kernel.Userspace,
236 	env.buildTime += time.Since(buildStart)
239 			env.log("%v", verr.Title)
240 			env.saveDebugFile(current.Hash, 0, verr.Output)
242 			env.log("%v", err)
247 	results, err := env.inst.Test(8, cfg.Repro.Syz, cfg.Repro.Opts, cfg.Repro.C)
248 	env.testTime += time.Since(testStart)
250 		env.log("failed: %v", err)
253 	bad, good := env.processResults(current, results)
263 func (env *env) processResults(current *vcs.Commit, results []error) (bad, good int) {  argument
282 			env.saveDebugFile(current.Hash, i, output)
290 			env.saveDebugFile(current.Hash, i, output)
300 		env.log("all runs: %v", verdicts[0])
303 			env.log("run #%v: %v", i, verdict)
310 func (env *env) buildEnvForCommit(commit string) (*buildEnv, error) {  argument
311 	cfg := env.cfg
312 	tags, err := env.repo.PreviousReleaseTags(commit)
336 func (env *env) saveDebugFile(hash string, idx int, data []byte) {  argument
337 	if env.cfg.DebugDir == "" || len(data) == 0 {
340 	osutil.WriteFile(filepath.Join(env.cfg.DebugDir, fmt.Sprintf("%v.%v", hash, idx)), data)
343 func (env *env) log(msg string, args ...interface{}) {  argument
344 	fmt.Fprintf(env.cfg.Trace, msg+"\n", args...)