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How to use ForeachArg method of prog Package

Best Syzkaller code snippet using prog.ForeachArg

analysis.go

Source:analysis.go

1// Copyright 2015 syzkaller project authors. All rights reserved.2// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.3// Conservative resource-related analysis of programs.4// The analysis figures out what files descriptors are [potentially] opened5// at a particular point in program, what pages are [potentially] mapped,6// what files were already referenced in calls, etc.7package prog8import (9	"fmt"10)11const (12	maxPages = 4 << 1013)14type state struct {15	target    *Target16	ct        *ChoiceTable17	files     map[string]bool18	resources map[string][]Arg19	strings   map[string]bool20	pages     [maxPages]bool21}22// analyze analyzes the program p up to but not including call c.23func analyze(ct *ChoiceTable, p *Prog, c *Call) *state {24	s := newState(p.Target, ct)25	for _, c1 := range p.Calls {26		if c1 == c {27			break28		}29		s.analyze(c1)30	}31	return s32}33func newState(target *Target, ct *ChoiceTable) *state {34	s := &state{35		target:    target,36		ct:        ct,37		files:     make(map[string]bool),38		resources: make(map[string][]Arg),39		strings:   make(map[string]bool),40	}41	return s42}43func (s *state) analyze(c *Call) {44	foreachArgArray(&c.Args, c.Ret, func(arg, base Arg, _ *[]Arg) {45		switch typ := arg.Type().(type) {46		case *ResourceType:47			if typ.Dir() != DirIn {48				s.resources[typ.Desc.Name] = append(s.resources[typ.Desc.Name], arg)49				// TODO: negative PIDs and add them as well (that's process groups).50			}51		case *BufferType:52			a := arg.(*DataArg)53			if typ.Dir() != DirOut && len(a.Data) != 0 {54				switch typ.Kind {55				case BufferString:56					s.strings[string(a.Data)] = true57				case BufferFilename:58					s.files[string(a.Data)] = true59				}60			}61		}62	})63	start, npages, mapped := s.target.AnalyzeMmap(c)64	if npages != 0 {65		if start+npages > uint64(len(s.pages)) {66			panic(fmt.Sprintf("address is out of bounds: page=%v len=%v bound=%v",67				start, npages, len(s.pages)))68		}69		for i := uint64(0); i < npages; i++ {70			s.pages[start+i] = mapped71		}72	}73}74func foreachSubargImpl(arg Arg, parent *[]Arg, f func(arg, base Arg, parent *[]Arg)) {75	var rec func(arg, base Arg, parent *[]Arg)76	rec = func(arg, base Arg, parent *[]Arg) {77		f(arg, base, parent)78		switch a := arg.(type) {79		case *GroupArg:80			for _, arg1 := range a.Inner {81				parent1 := parent82				if _, ok := arg.Type().(*StructType); ok {83					parent1 = &a.Inner84				}85				rec(arg1, base, parent1)86			}87		case *PointerArg:88			if a.Res != nil {89				rec(a.Res, arg, parent)90			}91		case *UnionArg:92			rec(a.Option, base, parent)93		}94	}95	rec(arg, nil, parent)96}97func foreachSubarg(arg Arg, f func(arg, base Arg, parent *[]Arg)) {98	foreachSubargImpl(arg, nil, f)99}100func foreachArgArray(args *[]Arg, ret Arg, f func(arg, base Arg, parent *[]Arg)) {101	for _, arg := range *args {102		foreachSubargImpl(arg, args, f)103	}104	if ret != nil {105		foreachSubargImpl(ret, nil, f)106	}107}108func foreachArg(c *Call, f func(arg, base Arg, parent *[]Arg)) {109	foreachArgArray(&c.Args, nil, f)110}111func foreachSubargOffset(arg Arg, f func(arg Arg, offset uint64)) {112	var rec func(Arg, uint64) uint64113	rec = func(arg1 Arg, offset uint64) uint64 {114		switch a := arg1.(type) {115		case *GroupArg:116			f(arg1, offset)117			var totalSize uint64118			for _, arg2 := range a.Inner {119				size := rec(arg2, offset)120				if !arg2.Type().BitfieldMiddle() {121					offset += size122					totalSize += size123				}124			}125			if totalSize > arg1.Size() {126				panic(fmt.Sprintf("bad group arg size %v, should be <= %v for %+v", totalSize, arg1.Size(), arg1))127			}128		case *UnionArg:129			f(arg1, offset)130			size := rec(a.Option, offset)131			offset += size132			if size > arg1.Size() {133				panic(fmt.Sprintf("bad union arg size %v, should be <= %v for arg %+v with type %+v", size, arg1.Size(), arg1, arg1.Type()))134			}135		default:136			f(arg1, offset)137		}138		return arg1.Size()139	}140	rec(arg, 0)141}142func RequiresBitmasks(p *Prog) bool {143	result := false144	for _, c := range p.Calls {145		foreachArg(c, func(arg, _ Arg, _ *[]Arg) {146			if a, ok := arg.(*ConstArg); ok {147				if a.Type().BitfieldOffset() != 0 || a.Type().BitfieldLength() != 0 {148					result = true149				}150			}151		})152	}153	return result154}155func RequiresChecksums(p *Prog) bool {156	result := false157	for _, c := range p.Calls {158		foreachArg(c, func(arg, _ Arg, _ *[]Arg) {159			if _, ok := arg.Type().(*CsumType); ok {160				result = true161			}162		})163	}164	return result165}...

ForeachArg

Using AI Code Generation

1import (2func main() {3	f, err := parser.ParseFile(fset, "1.go", nil, parser.ParseComments)4	if err != nil {5		fmt.Println("error parsing file", err)6	}7	for _, s := range f.Imports {8		fmt.Println(s.Path.Value)9	}10	for _, s := range f.Decls {11		fmt.Println(s)12	}13	for _, s := range f.Scope.Objects {14		fmt.Println(s.Name)15	}16	for _, s := range f.Comments {17		fmt.Println(s)18	}19	for _, s := range f.Unresolved {20		fmt.Println(s)21	}22	for _, s := range f.Scope.Objects {23		fmt.Println(s)24	}25	for _, s := range f.Scope.Objects {26		fmt.Println(s)27	}28	for _, s := range f.Scope.Objects {29		fmt.Println(s)30	}31	for _, s := range f.Scope.Objects {32		fmt.Println(s)33	}34	for _, s := range f.Scope.Objects {35		fmt.Println(s)36	}37	for _, s := range f.Scope.Objects {38		fmt.Println(s)39	}40	for _, s := range f.Scope.Objects {41		fmt.Println(s)42	}43	for _, s := range f.Scope.Objects {44		fmt.Println(s)45	}46}47import (48func main() {

ForeachArg

Using AI Code Generation

1import (2func main() {3	target, err := prog.GetTarget("linux", "amd64")4	if err != nil {5		fmt.Fprintf(os.Stderr, "failed to create target instance: %v", err)6		os.Exit(1)7	}8	prog, err := target.Deserialize([]byte(`9		#syz call: openat$fs2(0xffffffffffffff9c, 0x7f0000000000, 0x0, 0x0)10		openat$fs2(0xffffffffffffff9c, 0x7f0000000000, 0x0, 0x0)11	if err != nil {12		fmt.Fprintf(os.Stderr, "failed to deserialize the prog: %v", err)13		os.Exit(1)14	}15	fmt.Println("Program:")16	fmt.Println(prog.String())17	fmt.Println("Arg values:")18	prog.Calls[0].ForeachArg(func(arg prog.Arg, ctx prog.VisitCtx) {19		fmt.Printf("%v: %#v20	})21}22openat$fs2(0xffffffffffffff9c, 0x7f0000000000, 0x0, 0x0)23Arg{0}: 0xffffffffffffff9c24Arg{0}->Dir: 0xffffffffffffff9c25Arg{1}: 0x7f000000000026Arg{1}->Path: 0x7f000000000027Arg{2}: 0x028Arg{2}->Flags: 0x029Arg{3}: 0x030Arg{3}->Mode: 0x0

ForeachArg

Using AI Code Generation

1import (2func main() {3	flag.Parse()4	if flag.NArg() < 1 {5		fmt.Fprintln(os.Stderr, "usage: 2 [packages]")6		os.Exit(1)7	}8	conf := loader.Config{Build: &loader.FakeContext{GoPath: os.Getenv("GOPATH")}}9	_, err := conf.FromArgs(flag.Args(), true)10	if err != nil {11		log.Fatal(err)12	}13	prog, err := conf.Load()14	if err != nil {15		log.Fatal(err)16	}17	mainPkg := prog.Package("main").Pkg18	prog.BuildAll()19	fmt.Printf("Members of package %q:20", mainPkg.Path())21	for _, mem := range mainPkg.Scope().Children() {22		fmt.Println(mem.Name())23	}24	fmt.Printf("25", mainPkg.Path())26	for _, mem := range mainPkg.Scope().Children() {27		if fn, ok := mem.(*ssa.Function); ok {28			fmt.Println(fn.Name())29		}30	}31	fmt.Printf("32", mainPkg.Path())33	for _, mem := range mainPkg.Scope().Children() {34		if fn, ok := mem.(*ssa.Function); ok {35			fmt.Println(fn.Name())36		}37	}38	fmt.Printf("39", mainPkg.Path())40	for _, mem := range mainPkg.Scope().Children() {41		if fn, ok := mem.(*ssa.Function); ok {42			fmt.Println(fn.Name())43		}44	}45	fmt.Printf("46", mainPkg.Path())47	for _, mem := range mainPkg.Scope().Children() {48		if fn, ok := mem.(*ssa.Function); ok {49			fmt.Println(fn.Name

ForeachArg

Using AI Code Generation

1import (2func main() {3	var (4		name = flag.String("name", "everyone", "The greeting object.")5	flag.Parse()6	fmt.Printf("Hello, %s!7}8import (9func main() {10	var (11		name = flag.String("name", "everyone", "The greeting object.")12	flag.Parse()13	fmt.Printf("Hello, %s!14}15import (16func main() {17	var (18		name = flag.String("name", "everyone", "The greeting object.")19	flag.Parse()20	fmt.Printf("Hello, %s!21}22import (23func main() {24	var (25		name = flag.String("name", "everyone", "The greeting object.")26	flag.Parse()27	fmt.Printf("Hello, %s!28}29import (30func main() {31	var (32		name = flag.String("name", "everyone", "The greeting object.")33	flag.Parse()34	fmt.Printf("Hello, %s!35}36import (37func main() {38	var (39		name = flag.String("name", "everyone", "The greeting object.")40	flag.Parse()41	fmt.Printf("Hello, %s!42}43import (44func main() {45	var (46		name = flag.String("name", "everyone", "The greeting object.")47	flag.Parse()48	fmt.Printf("Hello, %s!49}

ForeachArg

Using AI Code Generation

1import (2func main() {3    flagset := getopt.New()4    log.SetFlags(0)5    log.SetPrefix("findcallers: ")6    flagset.Usage = func() {7        fmt.Fprintln(os.Stderr, "findcallers finds callers of a function")8        fmt.Fprintln(os.Stderr, "usage: findcallers [flags] functionname")9        flagset.PrintDefaults()10    }11    flagset.Parse(true)12    if flagset.NArg() != 1 {13        flagset.Usage()14        os.Exit(2)15    }16    funcname := flagset.Arg(0)17    prog, err := ssautil.AllPackages(nil, 0)18    if err != nil {19        log.Fatal(err)20    }21    prog.Build()22    for _, mem := range prog.Members {23        if mem.Name() == funcname {24            fmt.Printf("25            for _, b := range mem.Blocks {26                for _, instr := range b.Instrs {27                    if call, ok := instr.(*ssa.Call); ok {28                        if call.Call.IsInvoke() {29                            fmt.Printf("%s.%s30", call.Call.Value.Type(), call.Call.Method)31                        } else {32                            fmt.Printf("%s33                        }34                    }35                }36            }37        }38    }39    if n == 0 {40        fmt.Printf("%s not found41    }42}

ForeachArg

Using AI Code Generation

1import (2func main() {3	p, err := prog.Deserialize([]byte("r1 = openat$sockfs(0xffffffffffffff9c, 0x7f0000000000, 0x0, 0x1)"))4	if err != nil {5		panic(err)6	}7	p.ForeachArg(func(arg prog.Arg, ctx prog.ForeachArgCtx) {8		if arg.Type().Dir() == prog.DirOut {9			ctx.ReplaceArg(arg)10		}11	})12	fmt.Println(p.Serialize())13}14r1 = openat$sockfs(0xffffffffffffff9c, 0x7f0000000000, 0x0, 0x1)15import (16func main() {17	p, err := prog.Deserialize([]byte("r1 = openat$sockfs(0xffffffffffffff9c, 0x7f0000000000, 0x0, 0x1)"))18	if err != nil {19		panic(err)20	}21	p.ForeachCall(func(c *prog.Call) {22		if c.Meta().Name == "openat$sockfs" {23			c.Meta = prog.Syscalls[prog.GetCallID("openat")]24		}25	})26	fmt.Println(p.Serialize())27}28r1 = openat(0xffffffffffffff9c, 0x7f0000000000, 0x0, 0x1)29import (30func main() {31	p, err := prog.Deserialize([]byte("r1 = openat$sockfs(0xffffffffffffff9c, 0x7f0000000000, 0x0, 0x1)"))32	if err != nil {33		panic(err)34	}35	p.ForeachArg(func(arg prog.Arg, ctx prog.ForeachArgCtx)

ForeachArg

Using AI Code Generation

1import (2func main() {3    p := prog.InitTarget("linux", "amd64").Prog()4    s := p.AppendSyscall(p.Target.Syscalls[0])5    s.AppendArg(p.Target.MakeReturnArg(s.Call))6    fmt.Printf("%v7    for _, a := range p.ForeachArg(nil) {8        fmt.Printf("%v9    }10}11openat$dirfd$AT_FDCWD(0x0, 0x0, 0x0)12import (13func main() {14    p := prog.InitTarget("linux", "amd64").Prog()15    s := p.AppendSyscall(p.Target.Syscalls[0])16    s.AppendArg(p.Target.MakeReturnArg(s.Call))17    fmt.Printf("%v18    for _, c := range p.ForeachCall(nil) {19        fmt.Printf("%v20    }21}22openat$dirfd$AT_FDCWD(0x0, 0x0, 0x0)23openat$dirfd$AT_FDCWD(0x0, 0x0, 0x0)

ForeachArg

Using AI Code Generation

1import (2func main() {3	profile := pprof.NewProfile("test")4	profile.Add("main.main", 1)5	profile.Add("main.main", 2)6	profile.Add("main.main", 3)7	profile.ForEach(func(f *pprof.Function) {8		fmt.Println(f.Name)9	})10	profile.ForEach(func(f *pprof.Function) {11		fmt.Println(f.Name)12	})

ForeachArg

Using AI Code Generation

1import (2func main() {3	cmd := exec.Command("ls", "-l")4	cmd.ForeachArg(func(arg string) {5		fmt.Println(arg)6	})7}8Related posts: Golang | exec.Command() function

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