How to use FallbackSignal method of prog Package

Best Syzkaller code snippet using prog.FallbackSignal

prog_test.go

Source:prog_test.go Github

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...219 t.Errorf("path %q: got %v, want %v", path, got, want)220 }221 }222}223func TestFallbackSignal(t *testing.T) {224 type desc struct {225 prog string226 info []CallInfo227 }228 tests := []desc{229 // Test restored errno values and that non-executed syscalls don't get fallback signal.230 {231 `232fallback$0()233fallback$0()234fallback$0()235`,236 []CallInfo{237 {238 Flags: CallExecuted,239 Errno: 0,240 Signal: make([]uint32, 1),241 },242 {243 Flags: CallExecuted,244 Errno: 42,245 Signal: make([]uint32, 1),246 },247 {},248 },249 },250 // Test different cases of argument-dependent signal and that unsuccessful calls don't get it.251 {252 `253r0 = fallback$0()254fallback$1(r0)255fallback$1(r0)256fallback$1(0xffffffffffffffff)257fallback$1(0x0)258fallback$1(0x0)259`,260 []CallInfo{261 {262 Flags: CallExecuted,263 Errno: 0,264 Signal: make([]uint32, 1),265 },266 {267 Flags: CallExecuted,268 Errno: 1,269 Signal: make([]uint32, 1),270 },271 {272 Flags: CallExecuted,273 Errno: 0,274 Signal: make([]uint32, 2),275 },276 {277 Flags: CallExecuted,278 Errno: 0,279 Signal: make([]uint32, 1),280 },281 {282 Flags: CallExecuted,283 Errno: 0,284 Signal: make([]uint32, 2),285 },286 {287 Flags: CallExecuted,288 Errno: 2,289 Signal: make([]uint32, 1),290 },291 },292 },293 // Test that calls get no signal after a successful seccomp.294 {295 `296fallback$0()297fallback$0()298seccomp()299fallback$0()300seccomp()301fallback$0()302fallback$0()303`,304 []CallInfo{305 {306 Flags: CallExecuted,307 Errno: 0,308 Signal: make([]uint32, 1),309 },310 {311 Flags: CallExecuted,312 Errno: 0,313 Signal: make([]uint32, 1),314 },315 {316 Flags: CallExecuted,317 Errno: 1,318 Signal: make([]uint32, 1),319 },320 {321 Flags: CallExecuted,322 Errno: 0,323 Signal: make([]uint32, 1),324 },325 {326 Flags: CallExecuted,327 Errno: 0,328 Signal: make([]uint32, 1),329 },330 {331 Flags: CallExecuted,332 },333 {334 Flags: CallExecuted,335 },336 },337 },338 }339 target, err := GetTarget("test", "64")340 if err != nil {341 t.Fatal(err)342 }343 for i, test := range tests {344 t.Run(fmt.Sprint(i), func(t *testing.T) {345 p, err := target.Deserialize([]byte(test.prog), Strict)346 if err != nil {347 t.Fatal(err)348 }349 if len(p.Calls) != len(test.info) {350 t.Fatalf("call=%v info=%v", len(p.Calls), len(test.info))351 }352 wantSignal := make([]int, len(test.info))353 for i := range test.info {354 wantSignal[i] = len(test.info[i].Signal)355 test.info[i].Signal = nil356 }357 p.FallbackSignal(test.info)358 for i := range test.info {359 if len(test.info[i].Signal) != wantSignal[i] {360 t.Errorf("call %v: signal=%v want=%v", i, len(test.info[i].Signal), wantSignal[i])361 }362 for _, sig := range test.info[i].Signal {363 call, errno := DecodeFallbackSignal(sig)364 if call != p.Calls[i].Meta.ID {365 t.Errorf("call %v: sig=%x id=%v want=%v", i, sig, call, p.Calls[i].Meta.ID)366 }367 if errno != test.info[i].Errno {368 t.Errorf("call %v: sig=%x errno=%v want=%v", i, sig, errno, test.info[i].Errno)369 }370 }371 }372 })373 }374}375func TestSanitizeRandom(t *testing.T) {376 testEachTargetRandom(t, func(t *testing.T, target *Target, rs rand.Source, iters int) {377 for i := 0; i < iters; i++ {...

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analysis.go

Source:analysis.go Github

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...179 fallbackSignalCtor180 fallbackSignalFlags181 fallbackCallMask = 0x1fff182)183func (p *Prog) FallbackSignal(info []CallInfo) {184 resources := make(map[*ResultArg]*Call)185 for i, c := range p.Calls {186 inf := &info[i]187 if inf.Flags&CallExecuted == 0 {188 continue189 }190 id := c.Meta.ID191 typ := fallbackSignalErrno192 if inf.Flags&CallFinished != 0 && inf.Flags&CallBlocked != 0 {193 typ = fallbackSignalErrnoBlocked194 }195 inf.Signal = append(inf.Signal, encodeFallbackSignal(typ, id, inf.Errno))196 if c.Meta.Attrs.BreaksReturns {197 break198 }199 if inf.Errno != 0 {200 continue201 }202 ForeachArg(c, func(arg Arg, _ *ArgCtx) {203 if a, ok := arg.(*ResultArg); ok {204 resources[a] = c205 }206 })207 // Specifically look only at top-level arguments,208 // deeper arguments can produce too much false signal.209 flags := 0210 for _, arg := range c.Args {211 flags = extractArgSignal(arg, id, flags, inf, resources)212 }213 if flags != 0 {214 inf.Signal = append(inf.Signal,215 encodeFallbackSignal(fallbackSignalFlags, id, flags))216 }217 }218}219func extractArgSignal(arg Arg, callID, flags int, inf *CallInfo, resources map[*ResultArg]*Call) int {220 switch a := arg.(type) {221 case *ResultArg:222 flags <<= 1223 if a.Res != nil {224 ctor := resources[a.Res]225 if ctor != nil {226 inf.Signal = append(inf.Signal,227 encodeFallbackSignal(fallbackSignalCtor, callID, ctor.Meta.ID))228 }229 } else {230 if a.Val != a.Type().(*ResourceType).SpecialValues()[0] {231 flags |= 1232 }233 }234 case *ConstArg:235 const width = 3236 flags <<= width237 switch typ := a.Type().(type) {238 case *FlagsType:239 if typ.BitMask {240 for i, v := range typ.Vals {241 if a.Val&v != 0 {242 flags ^= 1 << (uint(i) % width)243 }244 }245 } else {246 for i, v := range typ.Vals {247 if a.Val == v {248 flags |= i % (1 << width)249 break250 }251 }252 }253 case *LenType:254 flags <<= 1255 if a.Val == 0 {256 flags |= 1257 }258 }259 case *PointerArg:260 flags <<= 1261 if a.IsSpecial() {262 flags |= 1263 }264 }265 return flags266}267func DecodeFallbackSignal(s uint32) (callID, errno int) {268 typ, id, aux := decodeFallbackSignal(s)269 switch typ {270 case fallbackSignalErrno, fallbackSignalErrnoBlocked:271 return id, aux272 case fallbackSignalCtor, fallbackSignalFlags:273 return id, 0274 default:275 panic(fmt.Sprintf("bad fallback signal type %v", typ))276 }277}278func encodeFallbackSignal(typ, id, aux int) uint32 {279 if typ & ^7 != 0 {280 panic(fmt.Sprintf("bad fallback signal type %v", typ))281 }282 if id & ^fallbackCallMask != 0 {283 panic(fmt.Sprintf("bad call id in fallback signal %v", id))284 }285 return uint32(typ) | uint32(id&fallbackCallMask)<<3 | uint32(aux)<<16286}287func decodeFallbackSignal(s uint32) (typ, id, aux int) {288 return int(s & 7), int((s >> 3) & fallbackCallMask), int(s >> 16)289}...

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FallbackSignal

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1import (2func main() {3 c := make(chan os.Signal, 2)4 signal.Notify(c, os.Interrupt, syscall.SIGTERM)5 go func() {6 fmt.Println("Got signal:", sig)7 fmt.Println("Exiting...")8 os.Exit(1)9 }()10 for {11 fmt.Println("Waiting...")12 time.Sleep(1 * time.Second)13 }14}

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FallbackSignal

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1import (2func main() {3 c := make(chan os.Signal, 1)4 signal.Notify(c, os.Interrupt, syscall.SIGTERM)5 go func() {6 fmt.Println("Exiting...")7 os.Exit(0)8 }()9 for {10 fmt.Println("Running...")11 }12}13import (14func main() {15 c := make(chan os.Signal, 1)16 signal.Notify(c, os.Interrupt, syscall.SIGTERM)17 go func() {18 fmt.Println("Exiting...")19 os.Exit(0)20 }()21 for {22 fmt.Println("Running...")23 }24}25import (26func main() {27 c := make(chan os.Signal, 1)28 signal.Notify(c, os.Interrupt

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FallbackSignal

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1import (2func main() {3 fmt.Println("Starting...")4 quit := make(chan os.Signal, 1)5 signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)6 fmt.Println("Shutdown Server ...")7}

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FallbackSignal

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

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FallbackSignal

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1import (2func main() {3 c := make(chan os.Signal, 1)4 signal.Notify(c, os.Interrupt, syscall.SIGTERM)5 fmt.Println("Got signal:", s)6}7import (8func main() {9 c := make(chan os.Signal, 1)10 signal.Notify(c, os.Interrupt, syscall.SIGTERM)11 fmt.Println("Got signal:", s)12}13import (14func main() {15 c := make(chan os.Signal, 1)16 signal.Notify(c, os.Interrupt, syscall.SIGTERM)17 fmt.Println("Got signal:", s)18}19import (20func main() {21 c := make(chan os.Signal, 1)22 signal.Notify(c, os.Interrupt, syscall.SIGTERM)23 fmt.Println("Got signal:", s)24}25import (26func main() {27 c := make(chan os.Signal, 1)28 signal.Notify(c, os.Interrupt

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FallbackSignal

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1import (2type prog struct {3}4func (p *prog) FallbackSignal() {5}6func main() {7 var args struct {8 }9 arg.MustParse(&args)10 p := &prog{11 Signal: make(chan os.Signal, 1),12 }13 signal.Notify(p.Signal, syscall.SIGINT, syscall.SIGTERM)14 defer signal.Stop(p.Signal)15 go func() {16 time.Sleep(args.Timeout)17 p.FallbackSignal()18 }()19 select {20 fmt.Println("Signal received:", s)21 case <-time.After(args.Timeout):22 fmt.Println("Timeout")23 }24}25import (26type prog struct {27}28func (p *prog) FallbackSignal() {29}30func main() {31 var args struct {32 }33 arg.MustParse(&args)34 p := &prog{35 Signal: make(chan os.Signal, 1),36 }37 signal.Notify(p.Signal, syscall.SIGINT, syscall.SIGTERM)38 defer signal.Stop(p.Signal)39 go func() {40 time.Sleep(args.Timeout)41 p.FallbackSignal()42 }()43 select {44 fmt.Println("Signal received:", s)45 case <-time.After(args.Timeout):46 fmt.Println("Timeout")47 }48}49import (50type prog struct {51}52func (p *prog) FallbackSignal() {53}54func main() {

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FallbackSignal

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1import "fmt"2import "github.com/alexflint/go-arg"3type Args struct {4}5func main() {6 args := Args{}7 arg.MustParse(&args)8 fmt.Println(args.FallbackSignal)9}10import "fmt"11import "github.com/alexflint/go-arg"12type Args struct {13}14func main() {15 args := Args{}16 arg.MustParse(&args)17 fmt.Println(args.FallbackSignal)18}19import "fmt"20import "github.com/alexflint/go-arg"21type Args struct {22}23func main() {24 args := Args{}25 arg.MustParse(&args)26 fmt.Println(args.FallbackSignal)27}28import "fmt"29import "github.com/alexflint/go-arg"30type Args struct {31}32func main() {33 args := Args{}34 arg.MustParse(&args)35 fmt.Println(args.FallbackSignal)36}37import "fmt"38import "github.com/alexflint/go-arg"39type Args struct {40}41func main() {42 args := Args{}43 arg.MustParse(&args)44 fmt.Println(args.FallbackSignal)45}46import "fmt"47import "github.com/alexflint/go-arg"48type Args struct {49}50func main() {51 args := Args{}52 arg.MustParse(&args)53 fmt.Println(args.FallbackSignal)54}55import "fmt

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FallbackSignal

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1import "fmt"2import "time"3func main() {4 fmt.Println("Starting Go Program")5 time.Sleep(10 * time.Second)6 fmt.Println("Go Program Exiting")7}8import "fmt"9import "time"10func main() {11 fmt.Println("Starting Go Program")12 time.Sleep(20 * time.Second)13 fmt.Println("Go Program Exiting")14}15import "fmt"16import "time"17func main() {18 fmt.Println("Starting Go Program")19 time.Sleep(30 * time.Second)20 fmt.Println("Go Program Exiting")21}22import "fmt"23import "time"24func main() {25 fmt.Println("Starting Go Program")26 time.Sleep(40 * time.Second)27 fmt.Println("Go Program Exiting")28}29import "fmt"30import "time"31func main() {32 fmt.Println("Starting Go Program")33 time.Sleep(50 * time.Second)34 fmt.Println("Go Program Exiting")35}36import "fmt"37import "time"38func main() {39 fmt.Println("Starting Go Program")40 time.Sleep(60 * time.Second)41 fmt.Println("Go Program Exiting")42}43import "fmt"44import "time"45func main() {46 fmt.Println("Starting Go Program")47 time.Sleep(70 * time.Second)48 fmt.Println("Go Program Exiting")49}50import "fmt"51import "time"52func main() {53 fmt.Println("Starting Go Program")54 time.Sleep(80 * time.Second)55 fmt.Println("Go Program Exiting")56}57import "fmt"58import "time"59func main() {

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