How to use testCProg method of repro Package

Best Syzkaller code snippet using repro.testCProg

repro.go

Source:repro.go Github

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...141 // Try to rerun the repro if the report is corrupted.142 for attempts := 0; ctx.report.Corrupted && attempts < 3; attempts++ {143 ctx.reproLog(3, "report is corrupted, running repro again")144 if res.CRepro {145 _, err = ctx.testCProg(res.Prog, res.Duration, res.Opts)146 } else {147 _, err = ctx.testProg(res.Prog, res.Duration, res.Opts)148 }149 if err != nil {150 return nil, err151 }152 }153 ctx.reproLog(3, "final repro crashed as (corrupted=%v):\n%s",154 ctx.report.Corrupted, ctx.report.Report)155 res.Report = ctx.report156 res.Stats = ctx.stats157 }158 close(ctx.bootRequests)159 for inst := range ctx.instances {160 inst.Close()161 }162 return res, err163}164func (ctx *context) repro(entries []*prog.LogEntry, crashStart int) (*Result, error) {165 // Cut programs that were executed after crash.166 for i, ent := range entries {167 if ent.Start > crashStart {168 entries = entries[:i]169 break170 }171 }172 reproStart := time.Now()173 defer func() {174 ctx.reproLog(3, "reproducing took %s", time.Since(reproStart))175 }()176 res, err := ctx.extractProg(entries)177 if err != nil {178 return nil, err179 }180 if res == nil {181 return nil, nil182 }183 defer func() {184 if res != nil {185 res.Opts.Repro = false186 }187 }()188 res, err = ctx.minimizeProg(res)189 if err != nil {190 return nil, err191 }192 // Try extracting C repro without simplifying options first.193 res, err = ctx.extractC(res)194 if err != nil {195 return nil, err196 }197 // Simplify options and try extracting C repro.198 if !res.CRepro {199 res, err = ctx.simplifyProg(res)200 if err != nil {201 return nil, err202 }203 }204 // Simplify C related options.205 if res.CRepro {206 res, err = ctx.simplifyC(res)207 if err != nil {208 return nil, err209 }210 }211 return res, nil212}213func (ctx *context) extractProg(entries []*prog.LogEntry) (*Result, error) {214 ctx.reproLog(2, "extracting reproducer from %v programs", len(entries))215 start := time.Now()216 defer func() {217 ctx.stats.ExtractProgTime = time.Since(start)218 }()219 // Extract last program on every proc.220 procs := make(map[int]int)221 for i, ent := range entries {222 procs[ent.Proc] = i223 }224 var indices []int225 for _, idx := range procs {226 indices = append(indices, idx)227 }228 sort.Ints(indices)229 var lastEntries []*prog.LogEntry230 for i := len(indices) - 1; i >= 0; i-- {231 lastEntries = append(lastEntries, entries[indices[i]])232 }233 // The shortest duration is 10 seconds to detect simple crashes (i.e. no races and no hangs).234 // The longest duration is 5 minutes to catch races and hangs. Note that this value must be larger235 // than hang/no output detection duration in vm.MonitorExecution, which is currently set to 3 mins.236 timeouts := []time.Duration{10 * time.Second, 1 * time.Minute, 5 * time.Minute}237 for _, timeout := range timeouts {238 // Execute each program separately to detect simple crashes caused by a single program.239 // Programs are executed in reverse order, usually the last program is the guilty one.240 res, err := ctx.extractProgSingle(reverseEntries(lastEntries), timeout)241 if err != nil {242 return nil, err243 }244 if res != nil {245 ctx.reproLog(3, "found reproducer with %d syscalls", len(res.Prog.Calls))246 return res, nil247 }248 // Don't try bisecting if there's only one entry.249 if len(entries) == 1 {250 continue251 }252 // Execute all programs and bisect the log to find multiple guilty programs.253 res, err = ctx.extractProgBisect(reverseEntries(entries), timeout)254 if err != nil {255 return nil, err256 }257 if res != nil {258 ctx.reproLog(3, "found reproducer with %d syscalls", len(res.Prog.Calls))259 return res, nil260 }261 }262 ctx.reproLog(0, "failed to extract reproducer")263 return nil, nil264}265func (ctx *context) createDefaultOps() csource.Options {266 opts := csource.Options{267 Threaded: true,268 Collide: true,269 Repeat: true,270 Procs: ctx.cfg.Procs,271 Sandbox: ctx.cfg.Sandbox,272 EnableTun: true,273 EnableCgroups: true,274 EnableNetdev: true,275 ResetNet: true,276 UseTmpDir: true,277 HandleSegv: true,278 WaitRepeat: true,279 Repro: true,280 }281 return opts282}283func (ctx *context) extractProgSingle(entries []*prog.LogEntry, duration time.Duration) (*Result, error) {284 ctx.reproLog(3, "single: executing %d programs separately with timeout %s", len(entries), duration)285 opts := ctx.createDefaultOps()286 for _, ent := range entries {287 opts.Fault = ent.Fault288 opts.FaultCall = ent.FaultCall289 opts.FaultNth = ent.FaultNth290 if opts.FaultCall < 0 || opts.FaultCall >= len(ent.P.Calls) {291 opts.FaultCall = len(ent.P.Calls) - 1292 }293 crashed, err := ctx.testProg(ent.P, duration, opts)294 if err != nil {295 return nil, err296 }297 if crashed {298 res := &Result{299 Prog: ent.P,300 Duration: duration * 3 / 2,301 Opts: opts,302 }303 ctx.reproLog(3, "single: successfully extracted reproducer")304 return res, nil305 }306 }307 ctx.reproLog(3, "single: failed to extract reproducer")308 return nil, nil309}310func (ctx *context) extractProgBisect(entries []*prog.LogEntry, baseDuration time.Duration) (*Result, error) {311 ctx.reproLog(3, "bisect: bisecting %d programs with base timeout %s", len(entries), baseDuration)312 opts := ctx.createDefaultOps()313 duration := func(entries int) time.Duration {314 return baseDuration + time.Duration((entries/4))*time.Second315 }316 // Bisect the log to find multiple guilty programs.317 entries, err := ctx.bisectProgs(entries, func(progs []*prog.LogEntry) (bool, error) {318 return ctx.testProgs(progs, duration(len(progs)), opts)319 })320 if err != nil {321 return nil, err322 }323 if len(entries) == 0 {324 return nil, nil325 }326 // TODO: Minimize each program before concatenation.327 // TODO: Return multiple programs if concatenation fails.328 ctx.reproLog(3, "bisect: %d programs left: \n\n%s\n", len(entries), encodeEntries(entries))329 ctx.reproLog(3, "bisect: trying to concatenate")330 // Concatenate all programs into one.331 prog := &prog.Prog{332 Target: entries[0].P.Target,333 }334 for _, entry := range entries {335 prog.Calls = append(prog.Calls, entry.P.Calls...)336 }337 dur := duration(len(entries)) * 3 / 2338 // Execute the program without fault injection.339 crashed, err := ctx.testProg(prog, dur, opts)340 if err != nil {341 return nil, err342 }343 if crashed {344 res := &Result{345 Prog: prog,346 Duration: dur,347 Opts: opts,348 }349 ctx.reproLog(3, "bisect: concatenation succeeded")350 return res, nil351 }352 // Try with fault injection.353 calls := 0354 for _, entry := range entries {355 if entry.Fault {356 opts.FaultCall = calls + entry.FaultCall357 opts.FaultNth = entry.FaultNth358 if entry.FaultCall < 0 || entry.FaultCall >= len(entry.P.Calls) {359 opts.FaultCall = calls + len(entry.P.Calls) - 1360 }361 crashed, err := ctx.testProg(prog, dur, opts)362 if err != nil {363 return nil, err364 }365 if crashed {366 res := &Result{367 Prog: prog,368 Duration: dur,369 Opts: opts,370 }371 ctx.reproLog(3, "bisect: concatenation succeeded with fault injection")372 return res, nil373 }374 }375 calls += len(entry.P.Calls)376 }377 ctx.reproLog(3, "bisect: concatenation failed")378 return nil, nil379}380// Minimize calls and arguments.381func (ctx *context) minimizeProg(res *Result) (*Result, error) {382 ctx.reproLog(2, "minimizing guilty program")383 start := time.Now()384 defer func() {385 ctx.stats.MinimizeProgTime = time.Since(start)386 }()387 call := -1388 if res.Opts.Fault {389 call = res.Opts.FaultCall390 }391 res.Prog, res.Opts.FaultCall = prog.Minimize(res.Prog, call, true,392 func(p1 *prog.Prog, callIndex int) bool {393 crashed, err := ctx.testProg(p1, res.Duration, res.Opts)394 if err != nil {395 ctx.reproLog(0, "minimization failed with %v", err)396 return false397 }398 return crashed399 })400 return res, nil401}402// Simplify repro options (threaded, collide, sandbox, etc).403func (ctx *context) simplifyProg(res *Result) (*Result, error) {404 ctx.reproLog(2, "simplifying guilty program")405 start := time.Now()406 defer func() {407 ctx.stats.SimplifyProgTime = time.Since(start)408 }()409 for _, simplify := range progSimplifies {410 opts := res.Opts411 if simplify(&opts) {412 crashed, err := ctx.testProg(res.Prog, res.Duration, opts)413 if err != nil {414 return nil, err415 }416 if crashed {417 res.Opts = opts418 // Simplification successful, try extracting C repro.419 res, err := ctx.extractC(res)420 if err != nil {421 return nil, err422 }423 if res.CRepro {424 return res, nil425 }426 }427 }428 }429 return res, nil430}431// Try triggering crash with a C reproducer.432func (ctx *context) extractC(res *Result) (*Result, error) {433 ctx.reproLog(2, "extracting C reproducer")434 start := time.Now()435 defer func() {436 ctx.stats.ExtractCTime = time.Since(start)437 }()438 crashed, err := ctx.testCProg(res.Prog, res.Duration, res.Opts)439 if err != nil {440 return nil, err441 }442 res.CRepro = crashed443 return res, nil444}445// Try to simplify the C reproducer.446func (ctx *context) simplifyC(res *Result) (*Result, error) {447 ctx.reproLog(2, "simplifying C reproducer")448 start := time.Now()449 defer func() {450 ctx.stats.SimplifyCTime = time.Since(start)451 }()452 for _, simplify := range cSimplifies {453 opts := res.Opts454 if simplify(&opts) {455 crashed, err := ctx.testCProg(res.Prog, res.Duration, opts)456 if err != nil {457 return nil, err458 }459 if crashed {460 res.Opts = opts461 }462 }463 }464 return res, nil465}466func (ctx *context) testProg(p *prog.Prog, duration time.Duration, opts csource.Options) (crashed bool, err error) {467 entry := prog.LogEntry{P: p}468 if opts.Fault {469 entry.Fault = true470 entry.FaultCall = opts.FaultCall471 entry.FaultNth = opts.FaultNth472 }473 return ctx.testProgs([]*prog.LogEntry{&entry}, duration, opts)474}475func (ctx *context) testProgs(entries []*prog.LogEntry, duration time.Duration, opts csource.Options) (476 crashed bool, err error) {477 inst := <-ctx.instances478 if inst == nil {479 return false, fmt.Errorf("all VMs failed to boot")480 }481 defer ctx.returnInstance(inst)482 if len(entries) == 0 {483 return false, fmt.Errorf("no programs to execute")484 }485 pstr := encodeEntries(entries)486 progFile, err := osutil.WriteTempFile(pstr)487 if err != nil {488 return false, err489 }490 defer os.Remove(progFile)491 vmProgFile, err := inst.Copy(progFile)492 if err != nil {493 return false, fmt.Errorf("failed to copy to VM: %v", err)494 }495 repeat := 1496 if opts.Repeat {497 repeat = 0498 }499 if !opts.Fault {500 opts.FaultCall = -1501 }502 program := entries[0].P.String()503 if len(entries) > 1 {504 program = "["505 for i, entry := range entries {506 program += fmt.Sprintf("%v", len(entry.P.Calls))507 if i != len(entries)-1 {508 program += ", "509 }510 }511 program += "]"512 }513 command := fmt.Sprintf("%v -executor %v -arch=%v -cover=0 -procs=%v -repeat=%v"+514 " -sandbox %v -threaded=%v -collide=%v %v",515 inst.execprogBin, inst.executorBin, ctx.cfg.TargetArch, opts.Procs, repeat,516 opts.Sandbox, opts.Threaded, opts.Collide, vmProgFile)517 ctx.reproLog(2, "testing program (duration=%v, %+v): %s", duration, opts, program)518 return ctx.testImpl(inst.Instance, command, duration)519}520func (ctx *context) testCProg(p *prog.Prog, duration time.Duration, opts csource.Options) (crashed bool, err error) {521 src, err := csource.Write(p, opts)522 if err != nil {523 return false, err524 }525 srcf, err := osutil.WriteTempFile(src)526 if err != nil {527 return false, err528 }529 defer os.Remove(srcf)530 bin, err := csource.Build(p.Target, "c", srcf)531 if err != nil {532 return false, err533 }534 defer os.Remove(bin)...

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testCProg

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1repro := NewRepro()2repro.testCProg()3repro := NewRepro()4repro.testCProg()5repro := NewRepro()6repro.testCProg()7repro := NewRepro()8repro.testCProg()9repro := NewRepro()10repro.testCProg()11repro := NewRepro()12repro.testCProg()13repro := NewRepro()14repro.testCProg()15repro := NewRepro()16repro.testCProg()17repro := NewRepro()18repro.testCProg()19repro := NewRepro()20repro.testCProg()21repro := NewRepro()22repro.testCProg()23repro := NewRepro()24repro.testCProg()25repro := NewRepro()26repro.testCProg()27repro := NewRepro()28repro.testCProg()29repro := NewRepro()30repro.testCProg()31repro := NewRepro()32repro.testCProg()

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testCProg

Using AI Code Generation

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1import (2func main() {3 fmt.Println("Hello World")4}5import (6func main() {7 fmt.Println("Hello World")8}9import (10func main() {11 fmt.Println("Hello World")12}13import (14func main() {15 fmt.Println("Hello World")16}17import (18func main() {19 fmt.Println("Hello World")20}21import (22func main() {23 fmt.Println("Hello World")24}25import (26func main() {27 fmt.Println("Hello World")28}29import (30func main() {31 fmt.Println("Hello World")32}33import (34func main() {35 fmt.Println("Hello World")36}37import (38func main() {39 fmt.Println("Hello World")40}41import (42func main() {43 fmt.Println("Hello World")44}45import (46func main() {47 fmt.Println("Hello World")48}49import (50func main() {51 fmt.Println("Hello World")52}

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testCProg

Using AI Code Generation

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1import (2func main() {3 r.TestCProg()4 fmt.Println("Hello, playground")5}6import "fmt"7type Repro struct {8}9func (r Repro) TestCProg() {10 fmt.Println("Hello, playground")11}12./2.go:8: cannot use r (type Repro) as type repro.Repro in argument to repro.TestCProg13How can I import the repro package and use the TestCProg method?

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testCProg

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1import "fmt"2import "C"3func main() {4 r.testCProg()5}6import "fmt"7import "C"8func main() {9 r.testCProg()10}11import "fmt"12import "C"13func main() {14 r.testCProg()15}16import "fmt"17import "C"18func main() {19 r.testCProg()20}21import "fmt"22import "C"23func main() {24 r.testCProg()25}26import "fmt"27import "C"28func main() {29 r.testCProg()30}31import "fmt"32import "C"33func main() {34 r.testCProg()35}36import "fmt"37import "C"38func main() {39 r.testCProg()40}41import "fmt"42import "C"43func main() {44 r.testCProg()45}46import "fmt"47import "C"48func main() {49 r.testCProg()50}51import "fmt"52import "C"53func main() {54 r.testCProg()

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testCProg

Using AI Code Generation

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1import (2func main() {3 fmt.Println(repro.TestCProg())4}5import (6func main() {7 fmt.Println(repro.TestCProg())8}9import (10func main() {11 fmt.Println(repro.TestCProg())12}13import (14func main() {15 fmt.Println(repro.TestCProg())16}17import (18func main() {19 fmt.Println(repro.TestCProg())20}21import (22func main() {23 fmt.Println(repro.TestCProg())24}25import (26func main() {27 fmt.Println(repro.TestCProg())28}29import (30func main() {31 fmt.Println(repro.TestCProg())32}33import (34func main() {35 fmt.Println(repro.TestCProg())36}

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testCProg

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1import "fmt"2import "repro"3func main() {4 fmt.Println(a.TestCProg())5}6import "fmt"7type A struct {}8func (a A) TestCProg() string {9 return fmt.Sprint("Hello from TestCProg")10}

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testCProg

Using AI Code Generation

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1import (2func main() {3 cmd := exec.Command("./testCProg")4 err := cmd.Run()5 if err != nil {6 fmt.Println("Error: ", err)7 }8 fmt.Println("Exit code: ", cmd.ProcessState.Sys().(syscall.WaitStatus).ExitStatus())9}

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testCProg

Using AI Code Generation

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1import (2func main() {3 canvas := svg.New(os.Stdout)4 canvas.Start(w, h)5 canvas.Rect(x, y, w, h, "fill:rgb(0,0,255);stroke-width:1;stroke:rgb(0,0,0)")6 canvas.End()7}8import (9func main() {10 canvas := svg.New(os.Stdout)11 canvas.Start(w, h)12 canvas.Rect(x, y, w, h, "fill:rgb(0,0,255);stroke-width:1;stroke:rgb(0,0,0)")13 canvas.End()14}15import (16func main() {17 canvas := svg.New(os.Stdout)18 canvas.Start(w, h)19 canvas.Rect(x, y, w, h, "fill:rgb(0,0,255);stroke-width:1;stroke:rgb(0,0,0)")20 canvas.End()21}22import (23func main() {24 canvas := svg.New(os.Stdout)

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testCProg

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1import (2func testCProg(s *C.char) *C.char {3 fmt.Println("Inside testCProg function")4}5func main() {6 fmt.Println("Inside main function")7 s := C.CString("Hello World")8 defer C.free(unsafe.Pointer(s))9 testCProg(s)10}11import "C"12import (13func main() {14 fmt.Println("Inside main function")15 s := C.CString("Hello World")16 defer C.free(unsafe.Pointer(s))17 C.testCProg(s)18}19gcc (Raspbian 6.3.0-18+rpi1+deb9u1) 6.3.0 20170516

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