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	}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.