How to use eatExcessive method of prog Package

Best Syzkaller code snippet using prog.eatExcessive

encoding.go

Source:encoding.go Github

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...251 prog.Calls = append(prog.Calls, c)252 p.Parse('(')253 for i := 0; p.Char() != ')'; i++ {254 if i >= len(meta.Args) {255 p.eatExcessive(false, "excessive syscall arguments")256 break257 }258 field := meta.Args[i]259 if IsPad(field.Type) {260 return nil, fmt.Errorf("padding in syscall %v arguments", name)261 }262 arg, err := p.parseArg(field.Type, DirIn)263 if err != nil {264 return nil, err265 }266 c.Args = append(c.Args, arg)267 if p.Char() != ')' {268 p.Parse(',')269 }270 }271 p.Parse(')')272 p.SkipWs()273 if !p.EOF() {274 if p.Char() != '#' {275 return nil, fmt.Errorf("tailing data (line #%v)", p.l)276 }277 if c.Comment != "" {278 prog.Comments = append(prog.Comments, c.Comment)279 }280 c.Comment = strings.TrimSpace(p.s[p.i+1:])281 }282 for i := len(c.Args); i < len(meta.Args); i++ {283 p.strictFailf("missing syscall args")284 c.Args = append(c.Args, meta.Args[i].DefaultArg(DirIn))285 }286 if len(c.Args) != len(meta.Args) {287 return nil, fmt.Errorf("wrong call arg count: %v, want %v", len(c.Args), len(meta.Args))288 }289 if r != "" && c.Ret != nil {290 p.vars[r] = c.Ret291 }292 p.comment = ""293 }294 if p.comment != "" {295 prog.Comments = append(prog.Comments, p.comment)296 }297 return prog, nil298}299func (p *parser) parseArg(typ Type, dir Dir) (Arg, error) {300 r := ""301 if p.Char() == '<' {302 p.Parse('<')303 r = p.Ident()304 p.Parse('=')305 p.Parse('>')306 }307 arg, err := p.parseArgImpl(typ, dir)308 if err != nil {309 return nil, err310 }311 if arg == nil {312 if typ != nil {313 arg = typ.DefaultArg(dir)314 } else if r != "" {315 return nil, fmt.Errorf("named nil argument")316 }317 }318 if r != "" {319 if res, ok := arg.(*ResultArg); ok {320 p.vars[r] = res321 }322 }323 return arg, nil324}325func (p *parser) parseArgImpl(typ Type, dir Dir) (Arg, error) {326 if typ == nil && p.Char() != 'n' {327 p.eatExcessive(true, "non-nil argument for nil type")328 return nil, nil329 }330 switch p.Char() {331 case '0':332 return p.parseArgInt(typ, dir)333 case 'r':334 return p.parseArgRes(typ, dir)335 case '&':336 return p.parseArgAddr(typ, dir)337 case '"', '\'':338 return p.parseArgString(typ, dir)339 case '{':340 return p.parseArgStruct(typ, dir)341 case '[':342 return p.parseArgArray(typ, dir)343 case '@':344 return p.parseArgUnion(typ, dir)345 case 'n':346 p.Parse('n')347 p.Parse('i')348 p.Parse('l')349 return nil, nil350 case 'A':351 p.Parse('A')352 p.Parse('U')353 p.Parse('T')354 p.Parse('O')355 return p.parseAuto(typ, dir)356 default:357 return nil, fmt.Errorf("failed to parse argument at '%c' (line #%v/%v: %v)",358 p.Char(), p.l, p.i, p.s)359 }360}361func (p *parser) parseArgInt(typ Type, dir Dir) (Arg, error) {362 val := p.Ident()363 v, err := strconv.ParseUint(val, 0, 64)364 if err != nil {365 return nil, fmt.Errorf("wrong arg value '%v': %v", val, err)366 }367 switch typ.(type) {368 case *ConstType, *IntType, *FlagsType, *ProcType, *CsumType:369 arg := Arg(MakeConstArg(typ, dir, v))370 if dir == DirOut && !typ.isDefaultArg(arg) {371 p.strictFailf("out arg %v has non-default value: %v", typ, v)372 arg = typ.DefaultArg(dir)373 }374 return arg, nil375 case *LenType:376 return MakeConstArg(typ, dir, v), nil377 case *ResourceType:378 return MakeResultArg(typ, dir, nil, v), nil379 case *PtrType, *VmaType:380 index := -v % uint64(len(p.target.SpecialPointers))381 return MakeSpecialPointerArg(typ, dir, index), nil382 default:383 p.eatExcessive(true, "wrong int arg %T", typ)384 return typ.DefaultArg(dir), nil385 }386}387func (p *parser) parseAuto(typ Type, dir Dir) (Arg, error) {388 switch typ.(type) {389 case *ConstType, *LenType, *CsumType:390 return p.auto(MakeConstArg(typ, dir, 0)), nil391 default:392 return nil, fmt.Errorf("wrong type %T for AUTO", typ)393 }394}395func (p *parser) parseArgRes(typ Type, dir Dir) (Arg, error) {396 id := p.Ident()397 var div, add uint64398 if p.Char() == '/' {399 p.Parse('/')400 op := p.Ident()401 v, err := strconv.ParseUint(op, 0, 64)402 if err != nil {403 return nil, fmt.Errorf("wrong result div op: '%v'", op)404 }405 div = v406 }407 if p.Char() == '+' {408 p.Parse('+')409 op := p.Ident()410 v, err := strconv.ParseUint(op, 0, 64)411 if err != nil {412 return nil, fmt.Errorf("wrong result add op: '%v'", op)413 }414 add = v415 }416 v := p.vars[id]417 if v == nil {418 p.strictFailf("undeclared variable %v", id)419 return typ.DefaultArg(dir), nil420 }421 arg := MakeResultArg(typ, dir, v, 0)422 arg.OpDiv = div423 arg.OpAdd = add424 return arg, nil425}426func (p *parser) parseArgAddr(typ Type, dir Dir) (Arg, error) {427 var elem Type428 elemDir := DirInOut429 switch t1 := typ.(type) {430 case *PtrType:431 elem, elemDir = t1.Elem, t1.ElemDir432 case *VmaType:433 default:434 p.eatExcessive(true, "wrong addr arg")435 return typ.DefaultArg(dir), nil436 }437 p.Parse('&')438 auto := false439 var addr, vmaSize uint64440 if p.Char() == 'A' {441 p.Parse('A')442 p.Parse('U')443 p.Parse('T')444 p.Parse('O')445 if elem == nil {446 return nil, fmt.Errorf("vma type can't be AUTO")447 }448 auto = true449 } else {450 var err error451 addr, vmaSize, err = p.parseAddr()452 if err != nil {453 return nil, err454 }455 }456 var inner Arg457 if p.Char() == '=' {458 p.Parse('=')459 if p.Char() == 'A' {460 p.Parse('A')461 p.Parse('N')462 p.Parse('Y')463 p.Parse('=')464 anyPtr := p.target.getAnyPtrType(typ.Size())465 typ, elem, elemDir = anyPtr, anyPtr.Elem, anyPtr.ElemDir466 }467 var err error468 inner, err = p.parseArg(elem, elemDir)469 if err != nil {470 return nil, err471 }472 }473 if elem == nil {474 if addr%p.target.PageSize != 0 {475 p.strictFailf("unaligned vma address 0x%x", addr)476 addr &= ^(p.target.PageSize - 1)477 }478 return MakeVmaPointerArg(typ, dir, addr, vmaSize), nil479 }480 if inner == nil {481 inner = elem.DefaultArg(elemDir)482 }483 arg := MakePointerArg(typ, dir, addr, inner)484 if auto {485 p.auto(arg)486 }487 return arg, nil488}489func (p *parser) parseArgString(t Type, dir Dir) (Arg, error) {490 typ, ok := t.(*BufferType)491 if !ok {492 p.eatExcessive(true, "wrong string arg")493 return t.DefaultArg(dir), nil494 }495 data, err := p.deserializeData()496 if err != nil {497 return nil, err498 }499 size := ^uint64(0)500 if p.Char() == '/' {501 p.Parse('/')502 sizeStr := p.Ident()503 size, err = strconv.ParseUint(sizeStr, 0, 64)504 if err != nil {505 return nil, fmt.Errorf("failed to parse buffer size: %q", sizeStr)506 }507 maxMem := p.target.NumPages * p.target.PageSize508 if size > maxMem {509 p.strictFailf("too large string argument %v", size)510 size = maxMem511 }512 }513 if !typ.Varlen() {514 size = typ.Size()515 } else if size == ^uint64(0) {516 size = uint64(len(data))517 }518 if dir == DirOut {519 return MakeOutDataArg(typ, dir, size), nil520 }521 if diff := int(size) - len(data); diff > 0 {522 data = append(data, make([]byte, diff)...)523 }524 data = data[:size]525 if typ.Kind == BufferString && len(typ.Values) != 0 &&526 // AUTOGENERATED will be padded by 0's.527 !strings.HasPrefix(typ.Values[0], "AUTOGENERATED") {528 matched := false529 for _, val := range typ.Values {530 if string(data) == val {531 matched = true532 break533 }534 }535 if !matched {536 p.strictFailf("bad string value %q, expect %q", data, typ.Values)537 data = []byte(typ.Values[0])538 }539 }540 return MakeDataArg(typ, dir, data), nil541}542func (p *parser) parseArgStruct(typ Type, dir Dir) (Arg, error) {543 p.Parse('{')544 t1, ok := typ.(*StructType)545 if !ok {546 p.eatExcessive(false, "wrong struct arg")547 p.Parse('}')548 return typ.DefaultArg(dir), nil549 }550 var inner []Arg551 for i := 0; p.Char() != '}'; i++ {552 if i >= len(t1.Fields) {553 p.eatExcessive(false, "excessive struct %v fields", typ.Name())554 break555 }556 field := t1.Fields[i]557 if IsPad(field.Type) {558 inner = append(inner, MakeConstArg(field.Type, dir, 0))559 } else {560 arg, err := p.parseArg(field.Type, dir)561 if err != nil {562 return nil, err563 }564 inner = append(inner, arg)565 if p.Char() != '}' {566 p.Parse(',')567 }568 }569 }570 p.Parse('}')571 for len(inner) < len(t1.Fields) {572 field := t1.Fields[len(inner)]573 if !IsPad(field.Type) {574 p.strictFailf("missing struct %v fields %v/%v", typ.Name(), len(inner), len(t1.Fields))575 }576 inner = append(inner, field.Type.DefaultArg(dir))577 }578 return MakeGroupArg(typ, dir, inner), nil579}580func (p *parser) parseArgArray(typ Type, dir Dir) (Arg, error) {581 p.Parse('[')582 t1, ok := typ.(*ArrayType)583 if !ok {584 p.eatExcessive(false, "wrong array arg %T", typ)585 p.Parse(']')586 return typ.DefaultArg(dir), nil587 }588 var inner []Arg589 for i := 0; p.Char() != ']'; i++ {590 arg, err := p.parseArg(t1.Elem, dir)591 if err != nil {592 return nil, err593 }594 inner = append(inner, arg)595 if p.Char() != ']' {596 p.Parse(',')597 }598 }599 p.Parse(']')600 if t1.Kind == ArrayRangeLen && t1.RangeBegin == t1.RangeEnd {601 for uint64(len(inner)) < t1.RangeBegin {602 p.strictFailf("missing array elements")603 inner = append(inner, t1.Elem.DefaultArg(dir))604 }605 inner = inner[:t1.RangeBegin]606 }607 return MakeGroupArg(typ, dir, inner), nil608}609func (p *parser) parseArgUnion(typ Type, dir Dir) (Arg, error) {610 t1, ok := typ.(*UnionType)611 if !ok {612 p.eatExcessive(true, "wrong union arg")613 return typ.DefaultArg(dir), nil614 }615 p.Parse('@')616 name := p.Ident()617 var optType Type618 index := -1619 for i, field := range t1.Fields {620 if name == field.Name {621 optType, index = field.Type, i622 break623 }624 }625 if optType == nil {626 p.eatExcessive(true, "wrong union option")627 return typ.DefaultArg(dir), nil628 }629 var opt Arg630 if p.Char() == '=' {631 p.Parse('=')632 var err error633 opt, err = p.parseArg(optType, dir)634 if err != nil {635 return nil, err636 }637 } else {638 opt = optType.DefaultArg(dir)639 }640 return MakeUnionArg(typ, dir, opt, index), nil641}642// Eats excessive call arguments and struct fields to recover after description changes.643func (p *parser) eatExcessive(stopAtComma bool, what string, args ...interface{}) {644 p.strictFailf(what, args...)645 paren, brack, brace := 0, 0, 0646 for !p.EOF() && p.e == nil {647 ch := p.Char()648 switch ch {649 case '(':650 paren++651 case ')':652 if paren == 0 {653 return654 }655 paren--656 case '[':657 brack++...

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eatExcessive

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

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eatExcessive

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1func main() {2 prog.eatExcessive()3}4func main() {5 prog.eatExcessive()6}7func main() {8 prog.eatExcessive()9}10func main() {11 prog.eatExcessive()12}13func main() {14 prog.eatExcessive()15}16func main() {17 prog.eatExcessive()18}19func main() {20 prog.eatExcessive()21}22func main() {23 prog.eatExcessive()24}25func main() {26 prog.eatExcessive()27}28func main() {29 prog.eatExcessive()30}31func main() {32 prog.eatExcessive()33}34func main() {35 prog.eatExcessive()36}37func main() {38 prog.eatExcessive()39}40func main() {41 prog.eatExcessive()42}

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eatExcessive

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1import "fmt"2type prog struct {3}4func (p prog) eatExcessive() {5fmt.Println("Eating too much")6}7func main() {8p1 := prog{name: "James", age: 32}9p1.eatExcessive()10}11import "fmt"12type prog struct {13}14func (p prog) eatExcessive() {15fmt.Println("Eating too much")16}17func main() {18p1 := prog{name: "James", age: 32}19p1.eatExcessive()20}21import "fmt"22type prog struct {23}24func (p prog) eatExcessive() {25fmt.Println("Eating too much")26}27func main() {28p1 := prog{name: "James", age: 32}29p1.eatExcessive()30}31import "fmt"32type prog struct {33}34func (p prog) eatExcessive() {35fmt.Println("Eating too much")36}37func main() {38p1 := prog{name: "James", age: 32}39p1.eatExcessive()40}41import "fmt"42type prog struct {43}44func (p prog) eatExcessive() {45fmt.Println("Eating too much")46}47func main() {48p1 := prog{name: "James", age: 32}49p1.eatExcessive()50}51import "fmt"52type prog struct {53}54func (p prog) eatExcessive() {55fmt.Println("Eating too much")56}

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eatExcessive

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1import (2type prog struct {3}4func (p prog) eatExcessive() {5 fmt.Println("I am", p.name, "and I am eating too much")6}7func main() {8 p1 := prog{9 }10 p1.eatExcessive()11}12import (13type prog struct {14}15func (p *prog) eatExcessive() {16 fmt.Println("I am", p.name, "and I am eating too much")17}18func main() {19 p1 := prog{20 }21 p1.eatExcessive()22 fmt.Println(p1.age)23}24import (25type prog struct {26}27func (p prog) eatExcessive() {28 fmt.Println("I am", p.name, "and I am eating too much")29}30func main() {31 p1 := prog{32 }33 p1.eatExcessive()34 fmt.Println(p1.age)35}

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eatExcessive

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

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eatExcessive

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1import (2func main() {3 prog.EatExcessive(100)4 fmt.Println("End of main")5}6import (7func EatExcessive(amount int) {8 fmt.Println("Eating excessive amount of food", amount)9}10import (11func EatExcessive(amount int) {12 fmt.Println("Eating excessive amount of food", amount)13}14import (15func EatExcessive(amount int) {16 fmt.Println("Eating excessive amount of food", amount)17}18import (19func EatExcessive(amount int) {20 fmt.Println("Eating excessive amount of food", amount)21}22import (23func EatExcessive(amount int) {24 fmt.Println("Eating excessive amount of food", amount)25}26import (27func EatExcessive(amount int) {28 fmt.Println("Eating excessive amount of food", amount)29}30import (31func EatExcessive(amount int) {32 fmt.Println("Eating excessive amount of food", amount)33}34import (35func EatExcessive(amount int) {36 fmt.Println("Eating excessive amount of food", amount)37}38import (39func EatExcessive(amount int) {40 fmt.Println("Eating excessive amount of food", amount)41}42import (43func EatExcessive(amount int) {44 fmt.Println("Eating excessive amount of food", amount)45}46import (47func EatExcessive(amount int) {48 fmt.Println("Eating excessive amount of food", amount)49}50import (51func EatExcessive(amount int) {52 fmt.Println("Eating excessive amount of food", amount)53}

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eatExcessive

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1import (2func main() {3 fmt.Println("Hello, playground")4 p.EatExcessive()5}6import (7type Prog struct {8}9func (p Prog) EatExcessive() {10 fmt.Println("I am eating too much")11}12Let’s see the code of the program. We have created a package called myprog. It has a struct called Prog. It has a method called EatExcessive. We are importing this package in the main package. W

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