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How to use patchConsts method of compiler Package

Best Syzkaller code snippet using compiler.patchConsts

consts.go

Source:consts.go

...166				c.CallName, str)167		}168	}169}170// patchConsts replaces all symbolic consts with their numeric values taken from consts map.171// Updates desc and returns set of unsupported syscalls and flags.172func (comp *compiler) patchConsts(consts0 map[string]uint64) {173	consts := make(map[string]uint64)174	for name, val := range consts0 {175		consts[name] = val176	}177	for name, val := range comp.builtinConsts {178		if _, ok := consts[name]; ok {179			panic(fmt.Sprintf("builtin const %v already defined", name))180		}181		consts[name] = val182	}183	for _, decl := range comp.desc.Nodes {184		switch n := decl.(type) {185		case *ast.IntFlags:186			// Unsupported flag values are dropped.187			var values []*ast.Int188			for _, v := range n.Values {189				if comp.patchIntConst(v, consts, nil) {190					values = append(values, v)191				}192			}193			n.Values = values194		case *ast.Resource, *ast.Struct, *ast.Call, *ast.TypeDef:195			// Walk whole tree and replace consts in Type's and Int's.196			missing := ""197			comp.foreachType(decl, func(_ *ast.Type, desc *typeDesc,198				args []*ast.Type, _ prog.IntTypeCommon) {199				for i, arg := range args {200					if desc.Args[i].Type.Kind == kindInt {201						comp.patchTypeConst(arg, consts, &missing)202					}203				}204			})205			switch n := decl.(type) {206			case *ast.Resource:207				for _, v := range n.Values {208					comp.patchIntConst(v, consts, &missing)209				}210			case *ast.Call:211				for _, attr := range n.Attrs {212					if callAttrs[attr.Ident].HasArg {213						comp.patchTypeConst(attr.Args[0], consts, &missing)214					}215				}216			case *ast.Struct:217				for _, attr := range n.Attrs {218					if structOrUnionAttrs(n)[attr.Ident].HasArg {219						comp.patchTypeConst(attr.Args[0], consts, &missing)220					}221				}222			}223			if missing == "" {224				continue225			}226			// Produce a warning about unsupported syscall/resource/struct.227			// TODO(dvyukov): we should transitively remove everything that228			// depends on unsupported things. Potentially we still can get,229			// say, a bad int range error due to the wrong const value.230			// However, if we have a union where one of the options is231			// arch-specific and does not have a const value, it's probably232			// better to remove just that option. But then if we get to 0233			// options in the union, we still need to remove it entirely.234			pos, typ, name := decl.Info()235			if id := typ + " " + name; !comp.unsupported[id] {236				comp.unsupported[id] = true237				comp.warning(pos, "unsupported %v: %v due to missing const %v",238					typ, name, missing)239			}240			if c, ok := decl.(*ast.Call); ok {241				c.NR = ^uint64(0) // mark as unused to not generate it242			}243		}244	}245}246func (comp *compiler) patchIntConst(n *ast.Int, consts map[string]uint64, missing *string) bool {247	return comp.patchConst(&n.Value, &n.Ident, consts, missing, false)248}249func (comp *compiler) patchTypeConst(n *ast.Type, consts map[string]uint64, missing *string) {250	comp.patchConst(&n.Value, &n.Ident, consts, missing, true)251	for _, col := range n.Colon {252		comp.patchConst(&col.Value, &col.Ident, consts, missing, true)253	}254}255func (comp *compiler) patchConst(val *uint64, id *string, consts map[string]uint64, missing *string, reset bool) bool {256	if *id == "" {257		return true258	}259	if v, ok := consts[*id]; ok {260		if reset {261			*id = ""262		}263		*val = v264		return true265	}266	if missing != nil && *missing == "" {267		*missing = *id268	}269	// 1 is slightly safer than 0 and allows to work-around e.g. an array size270	// that comes from a const missing on an arch. Also see the TODO in patchConsts.271	*val = 1272	return false273}...

patchConsts

Using AI Code Generation

1import (2func main() {3	m := ir.NewModule()4	fn := m.NewFunc("foo", types.Void)5	entry := fn.NewBlock("entry")6	entry.NewRet(constant.NewInt(types.I32, 42))7	fmt.Println(m)8}

patchConsts

Using AI Code Generation

1import (2func main() {3	constants := []string{"a", "b", "c"}4	constExprs := []string{"1 + 2", "2 + 3", "3 + 4"}5	vars := []string{"x", "y", "z"}6	varExprs := []string{"1", "2", "3"}7	fset := token.NewFileSet()8	f, err := parser.ParseFile(fset, "2.go", nil, parser.ParseComments)9	if err != nil {10		log.Fatal(err)11	}12	info := &types.Info{13		Defs: make(map[*ast.Ident]types.Object),14	}15	_, err = config.Check("2.go", fset, []*ast.File{f}, info)16	if err != nil {17		log.Fatal(err)18	}19	for name := range info.Defs {20		if name.Name != "_" {21			names = append(names, name.Name)22		}23	}24	fmt.Println("Names:", strings.Join(names, ", "))25	fmt.Println("Types and values:")26	for _, name := range names {27		obj := info.Defs[ast.NewIdent(name)]28		fmt.Printf("%s: %s, %v\n", name, obj.Type(), obj)29	}

patchConsts

Using AI Code Generation

1import (2func main() {3	if len(os.Args) < 2 {4		fmt.Println("Usage: go run 2.go <filename>")5		os.Exit(1)6	}7	parser := parser.NewParser(filename)8	prog := parser.Parse()9	comp := compiler.NewCompiler()10	comp.Compile(prog)11	comp.PatchConsts()12	comp.DumpCode()13}

patchConsts

Using AI Code Generation

1import (2func main() {3	fmt.Println("a: ", a)4	fmt.Println("b: ", b)5	fmt.Println("swapping a and b")6	swap(&a, &b)7	fmt.Println("a: ", a)8	fmt.Println("b: ", b)9	fmt.Println("swapping a and b using reflect")10	swapReflect(&a, &b)11	fmt.Println("a: ", a)12	fmt.Println("b: ", b)13}14func swap(a *int, b *int) {15}16func swapReflect(a *int, b *int) {17	reflect.ValueOf(a).Elem().SetInt(int64(*b))18	reflect.ValueOf(b).Elem().SetInt(int64(*a))19}

patchConsts

Using AI Code Generation

1import "fmt"2import "github.com/elliotchance/c2go/program"3func main() {4    p := program.NewProgram()5    p.AddSourceFile("2.go")6    p.PatchConsts()7    fmt.Println(p.GetSourceFiles()[0].GetContents())8}9### Using `FindAll()` method10import "fmt"11import "github.com/elliotchance/c2go/program"12func main() {13    p := program.NewProgram()14    p.AddSourceFile("3.go")15    p.PatchConsts()16    fmt.Println(p.FindAll("main"))17}18### Using `Find()` method19import "fmt"20import "github.com/elliotchance/c2go/program"21func main() {22    p := program.NewProgram()23    p.AddSourceFile("4.go")24    p.PatchConsts()25    fmt.Println(p.Find("main"))26}27### Using `FindAll()` method28import "fmt"29import "github.com/elliotchance/c2go/program"30func main() {31    p := program.NewProgram()32    p.AddSourceFile("5.go")33    p.PatchConsts()34    fmt.Println(p.FindAll("main"))35}36### Using `Find()` method37import "fmt"38import "github.com/elliotchance/c2go/program"39func main() {40    p := program.NewProgram()41    p.AddSourceFile("6.go")

patchConsts

Using AI Code Generation

1import (2type compiler struct {3}4func (c *compiler) patchConsts() {5	for _, decl := range c.file.Decls {6		gen, ok := decl.(*ast.GenDecl)7		if !ok || gen.Tok != token.CONST {8		}9		for _, spec := range gen.Specs {10			valueSpec, ok := spec.(*ast.ValueSpec)11			if !ok {12			}13			for i, name := range valueSpec.Names {14				if name.Name == "Pi" {15					valueSpec.Values[i] = &ast.BasicLit{16						Value: strconv.FormatFloat(math.Pi, 'g', -1, 64),17					}18				}19			}20		}21	}22}23func main() {24	fset := token.NewFileSet()25	src, err := ioutil.ReadFile("2.go")26	if err != nil {27		log.Fatal(err)28	}29	c := &compiler{30	}31	f, err := parser.ParseFile(fset, "2.go", src, parser.ParseComments)32	if err != nil {33		log.Fatal(err)34	}35	c.patchConsts()36	fmt.Printf("%s", src)37}

patchConsts

Using AI Code Generation

1import (2func main() {3	var constsMap = make(map[string]int)4	file, err = os.Open("code.txt")5	if err != nil {6		fmt.Println(err)7	}8	defer file.Close()9	scanner = bufio.NewScanner(file)10	for scanner.Scan() {11		line = scanner.Text()12		code = append(code, line)13	}14	file, err = os.Open("consts.txt")15	if err != nil {16		fmt.Println(err)17	}18	defer file.Close()19	scanner = bufio.NewScanner(file)20	for scanner.Scan() {21		line = scanner.Text()22		consts = append(consts, line)23	}24	constsAddr, err = strconv.Atoi(consts[constsIndex])25	if err != nil {26		fmt.Println(err)27	}28	codeAddr, err = strconv.Atoi(code[codeIndex])29	if err != nil {30		fmt.Println(err)31	}32	for codeIndex < len(code) {33		if codeAddr == constsAddr {34			if constsIndex != len(consts) {35				constsAddr, err = strconv.Atoi(consts[constsIndex])36				if err != nil {37					fmt.Println(err)

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