How to use write method of prog Package

Best Syzkaller code snippet using prog.write

writer.go

Source:writer.go

1// elfwriter is a package to write ELF files without having their entire2// contents in memory at any one time.3// This package is incomplete, only features needed to write core files are4// implemented, notably missing:5// - section headers6// - program headers at the beginning of the file7package elfwriter8import (9	"debug/elf"10	"encoding/binary"11	"io"12)13// WriteCloserSeeker is the union of io.Writer, io.Closer and io.Seeker.14type WriteCloserSeeker interface {15	io.Writer16	io.Seeker17	io.Closer18}19// Writer writes ELF files.20type Writer struct {21	w     WriteCloserSeeker22	Err   error23	Progs []*elf.ProgHeader24	seekProgHeader int6425	seekProgNum    int6426}27type Note struct {28	Type elf.NType29	Name string30	Data []byte31}32// New creates a new Writer.33func New(w WriteCloserSeeker, fhdr *elf.FileHeader) *Writer {34	const (35		ehsize    = 6436		phentsize = 5637	)38	if seek, _ := w.Seek(0, io.SeekCurrent); seek != 0 {39		panic("can't write halfway through a file")40	}41	r := &Writer{w: w}42	if fhdr.Class != elf.ELFCLASS64 {43		panic("unsupported")44	}45	if fhdr.Data != elf.ELFDATA2LSB {46		panic("unsupported")47	}48	// e_ident49	r.Write([]byte{0x7f, 'E', 'L', 'F', byte(fhdr.Class), byte(fhdr.Data), byte(fhdr.Version), byte(fhdr.OSABI), byte(fhdr.ABIVersion), 0, 0, 0, 0, 0, 0, 0})50	r.u16(uint16(fhdr.Type))    // e_type51	r.u16(uint16(fhdr.Machine)) // e_machine52	r.u32(uint32(fhdr.Version)) // e_version53	r.u64(0)                    // e_entry54	r.seekProgHeader = r.Here()55	r.u64(0)         // e_phoff56	r.u64(0)         // e_shoff57	r.u32(0)         // e_flags58	r.u16(ehsize)    // e_ehsize59	r.u16(phentsize) // e_phentsize60	r.seekProgNum = r.Here()61	r.u16(0)                     // e_phnum62	r.u16(0)                     // e_shentsize63	r.u16(0)                     // e_shnum64	r.u16(uint16(elf.SHN_UNDEF)) // e_shstrndx65	// Sanity check, size of file header should be the same as ehsize66	if sz, _ := w.Seek(0, io.SeekCurrent); sz != ehsize {67		panic("internal error, ELF header size")68	}69	return r70}71// WriteNotes writes notes to the current location, returns a ProgHeader describing the72// notes.73func (w *Writer) WriteNotes(notes []Note) *elf.ProgHeader {74	if len(notes) == 0 {75		return nil76	}77	h := &elf.ProgHeader{78		Type:  elf.PT_NOTE,79		Align: 4,80	}81	for i := range notes {82		note := &notes[i]83		w.Align(4)84		if h.Off == 0 {85			h.Off = uint64(w.Here())86		}87		w.u32(uint32(len(note.Name)))88		w.u32(uint32(len(note.Data)))89		w.u32(uint32(note.Type))90		w.Write([]byte(note.Name))91		w.Align(4)92		w.Write(note.Data)93	}94	h.Filesz = uint64(w.Here()) - h.Off95	return h96}97// WriteProgramHeaders writes the program headers at the current location98// and patches the file header accordingly.99func (w *Writer) WriteProgramHeaders() {100	phoff := w.Here()101	// Patch File Header102	w.w.Seek(w.seekProgHeader, io.SeekStart)103	w.u64(uint64(phoff))104	w.w.Seek(w.seekProgNum, io.SeekStart)105	w.u64(uint64(len(w.Progs)))106	w.w.Seek(0, io.SeekEnd)107	for _, prog := range w.Progs {108		w.u32(uint32(prog.Type))109		w.u32(uint32(prog.Flags))110		w.u64(prog.Off)111		w.u64(prog.Vaddr)112		w.u64(prog.Paddr)113		w.u64(prog.Filesz)114		w.u64(prog.Memsz)115		w.u64(prog.Align)116	}117}118// Here returns the current seek offset from the start of the file.119func (w *Writer) Here() int64 {120	r, err := w.w.Seek(0, io.SeekCurrent)121	if err != nil && w.Err == nil {122		w.Err = err123	}124	return r125}126// Align writes as many padding bytes as needed to make the current file127// offset a multiple of align.128func (w *Writer) Align(align int64) {129	off := w.Here()130	alignOff := (off + (align - 1)) &^ (align - 1)131	if alignOff-off > 0 {132		w.Write(make([]byte, alignOff-off))133	}134}135func (w *Writer) Write(buf []byte) {136	_, err := w.w.Write(buf)137	if err != nil && w.Err == nil {138		w.Err = err139	}140}...

write

Using AI Code Generation

1import "fmt"2type prog struct {3}4func main() {5	p1 := prog{6	}7	p1.write()8}9func (p prog) write() {10	fmt.Println("My name is", p.name)11	fmt.Println("My age is", p.age)12}13import "fmt"14type prog struct {15}16func main() {17	p1 := prog{18	}19	p1.write()20}21func (p prog) write() {22	fmt.Println("My name is", p.name)23	fmt.Println("My age is", p.age)24}25import "fmt"26type prog struct {27}28func main() {29	p1 := prog{30	}31	p1.write()32}33func (p prog) write() {34	fmt.Println("My name is", p.name)35	fmt.Println("My age is", p.age)36}37import "fmt"38type prog struct {39}40func main() {41	p1 := prog{42	}43	p1.write()44}45func (p prog) write() {46	fmt.Println("My name is", p.name)47	fmt.Println("My age is", p.age)48}49import "fmt"50type prog struct {51}52func main() {53	p1 := prog{54	}55	p1.write()56}57func (p prog) write() {58	fmt.Println("My name is", p.name)59	fmt.Println("My age is", p.age)60}61import "fmt"

write

Using AI Code Generation

1import "fmt"2type Prog struct {3}4func (p Prog) write() {5    fmt.Println("Writing program in", p.lang)6}7func main() {8    p := Prog{"Go", 3.5}9    p.write()10}

write

Using AI Code Generation

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

write

Using AI Code Generation

1import "fmt"2func main() {3	p.write()4}5import "fmt"6type prog struct {7}8func (p prog) write() {9	fmt.Println("Name: ", p.name)10	fmt.Println("Age: ", p.age)11	fmt.Println("Place: ", p.place)12}

write

Using AI Code Generation

1import (2type prog struct {3}4type prog1 struct {5}6func main() {7	p1 := prog{"sai", 24}8	p2 := prog1{"sai", 24}9	fmt.Println(p1)10	fmt.Println(p2)11}

write

Using AI Code Generation

1import "fmt"2type Prog struct {3}4func main() {5	p := Prog{name: "Vishal", age: 21}6	fmt.Println(p)7	p.write()8	fmt.Println(p)9}10func (p Prog) write() {11}12import "fmt"13type Prog struct {14}15func main() {16	p := Prog{name: "Vishal", age: 21}17	fmt.Println(p)18	p.write()19	fmt.Println(p)20	p.read()21	fmt.Println(p)22}23func (p Prog) write() {24}25func (p Prog) read() {26	fmt.Println(p)27}28import "fmt"29type Prog struct {30}31func main() {32	p := Prog{name: "Vishal", age: 21}33	fmt.Println(p)34	p.write()35	fmt.Println(p)36	p.read()37	fmt.Println(p)38}39func (p Prog) write() {40}41func (p Prog) read() {42}43import "fmt"44type Prog struct {45}46func main() {47	p := Prog{name: "Vishal", age: 21}48	fmt.Println(p)49	p.write()50	fmt.Println(p)51	p.read()52	fmt.Println(p)53}54func (p *Prog) write() {55}56func (p *Prog) read() {57}58import "fmt"59type Prog struct {60}61func main() {62	p := Prog{name: "Vishal", age:

write

Using AI Code Generation

1import (2func main() {3	p := prog.NewProg()4	p.Write("Hello, World")5	fmt.Println(p.String())6}7import (8func main() {9	p := prog.NewProg()10	p.Write("Hello, World")11	fmt.Println(p.Read())12}13import (14func main() {15	p := prog.NewProg()16	p.Write("Hello, World")17	p.Add("!")18	fmt.Println(p.String())19}20import (21func main() {22	p := prog.NewProg()23	p.Write("Hello, World")24	p.Add("!")25	fmt.Println(p.Read())26}27import (28func main() {29	p := prog.NewProg()30	p.Write("Hello, World")31	p.Add("!")32	fmt.Println(p.Read())33}34import (35func main() {36	p := prog.NewProg()37	p.Write("Hello, World")38	p.Add("!")39	fmt.Println(p.Read())40}41import (42func main() {43	p := prog.NewProg()44	p.Write("Hello, World")45	p.Add("!")46	fmt.Println(p.Read())47}48import (49func main() {50	p := prog.NewProg()51	p.Write("Hello, World")52	p.Add("!")53	fmt.Println(p.Read())54}55import (56func main() {57	p := prog.NewProg()58	p.Write("Hello, World")59	p.Add("!")60	fmt.Println(p.Read())61}

write

Using AI Code Generation

1import (2func main() {3 p := Prog.NewProg()4 p.Write()5 fmt.Println("Hello World!")6}

write

Using AI Code Generation

1import "fmt"2import "os"3import "bufio"4import "strconv"5import "strings"6import "time"7import "math/rand"8import "math"9import "io/ioutil"10import "log"11import "os/exec"12import "syscall"13import "./prog"14import "./prog2"15import "runtime"16import "runtime/pprof"17import "flag"18import "runtime/debug"19import "sync"20import "sync/atomic"21import "unsafe"22import "reflect"23import "encoding/binary"24import "net"25import "net/http"26import "net/rpc"27import "net/rpc/jsonrpc"28import "encoding/json"29import "crypto/tls"30import "crypto/x509"31import "io"32import "bufio"33import "io/ioutil"34import "bytes"35import "text/template"36import "path/filepath"37import "path"38import "os/user"39import

write

Using AI Code Generation

1import (2func main() {3	s.SetName("Saurabh")4	s.SetAge(23)5	s.SetRollNo(12)6	fmt.Println(s.GetName())7	fmt.Println(s.GetAge())8	fmt.Println(s.GetRollNo())9}

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