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How to use writeCopyin method of prog Package

Best Syzkaller code snippet using prog.writeCopyin

encodingexec.go

Source:encodingexec.go

...65}66func (w *execContext) serializeCall(c *Call) {67	// Calculate arg offsets within structs.68	// Generate copyin instructions that fill in data into pointer arguments.69	w.writeCopyin(c)70	// Generate checksum calculation instructions starting from the last one,71	// since checksum values can depend on values of the latter ones72	w.writeChecksums()73	// Generate the call itself.74	w.write(uint64(c.Meta.ID))75	if c.Ret != nil && len(c.Ret.uses) != 0 {76		if _, ok := w.args[c.Ret]; ok {77			panic("argInfo is already created for return value")78		}79		w.args[c.Ret] = argInfo{Idx: w.copyoutSeq, Ret: true}80		w.write(w.copyoutSeq)81		w.copyoutSeq++82	} else {83		w.write(ExecNoCopyout)84	}85	w.write(uint64(len(c.Args)))86	for _, arg := range c.Args {87		w.writeArg(arg)88	}89	// Generate copyout instructions that persist interesting return values.90	w.writeCopyout(c)91}92type execContext struct {93	target     *Target94	buf        []byte95	eof        bool96	args       map[Arg]argInfo97	copyoutSeq uint6498	// Per-call state cached here to not pass it through all functions.99	csumMap  map[Arg]CsumInfo100	csumUses map[Arg]struct{}101}102type argInfo struct {103	Addr uint64 // physical addr104	Idx  uint64 // copyout instruction index105	Ret  bool106}107func (w *execContext) writeCopyin(c *Call) {108	ForeachArg(c, func(arg Arg, ctx *ArgCtx) {109		if ctx.Base == nil {110			return111		}112		addr := w.target.PhysicalAddr(ctx.Base) + ctx.Offset113		addr -= arg.Type().UnitOffset()114		if w.willBeUsed(arg) {115			w.args[arg] = argInfo{Addr: addr}116		}117		switch arg.(type) {118		case *GroupArg, *UnionArg:119			return120		}121		typ := arg.Type()...

writeCopyin

Using AI Code Generation

1import (2func main() {3	target, err := prog.GetTarget(sys.GuessOS(), "amd64")4	if err != nil {5		log.Fatal(err)6	}7	data, err := ioutil.ReadFile("corpus")8	if err != nil {9		log.Fatal(err)10	}11	p := target.Deserialize(data)12	fmt.Printf("%s\n", p.Serialize())13	fmt.Println("Done")14}

writeCopyin

Using AI Code Generation

1import (2func main() {3	prog := syscall.Prog{}4	instr := syscall.Instruction{}5	reg := syscall.Register{}6	instr.Registers = append(instr.Registers, reg)7	prog.Instructions = append(prog.Instructions, instr)8	err := prog.WriteCopyin(os.Stdout)9	if err != nil {10		fmt.Println(err)11	}12}

writeCopyin

Using AI Code Generation

1import (2func main() {3	if len(os.Args) != 3 {4		fmt.Printf("Usage: %s <input file> <output file>\n", os.Args[0])5		os.Exit(1)6	}7	s, err = ioutil.ReadFile(os.Args[1])8	if err != nil {9		fmt.Printf("Error reading file: %s\n", err)10		os.Exit(1)11	}12	err = ioutil.WriteFile(os.Args[2], []byte(s), 0644)13	if err != nil {14		fmt.Printf("Error writing file: %s\n", err)15		os.Exit(1)16	}17	err = MiscLib.WriteCopyout(os.Args[2], s)18	if err != nil {19		fmt.Printf("Error writing file: %s\n", err)20		os.Exit(1)21	}22	err = MiscLib.WriteCopyout(os.Args[2], s)23	if err != nil {24		fmt.Printf("Error writing file: %s\n", err)25		os.Exit(1)26	}27	err = MiscLib.WriteCopyout(os.Args[2], s)28	if err != nil {29		fmt.Printf("Error writing file: %s\n", err)30		os.Exit(1)31	}32	err = MiscLib.WriteCopyout(os.Args[2], s)33	if err != nil {34		fmt.Printf("Error writing file: %s\n", err)35		os.Exit(1)36	}

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