How to use patchConst method of compiler Package

Best Syzkaller code snippet using compiler.patchConst

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}...

patchConst

Using AI Code Generation

1import (2    "go/importer"3func main() {4    fset := token.NewFileSet()5    file, err := parser.ParseFile(fset, "1.go", nil, 0)6    if err != nil {7        panic(err)8    }9    conf := types.Config{Importer: importer.Default()}10    info := &types.Info{11        Uses: make(map[*ast.Ident]types.Object),12        Defs: make(map[*ast.Ident]types.Object),13    }14    _, err = conf.Check("example", fset, []*ast.File{file}, info)15    if err != nil {16        panic(err)17    }18    ast.Walk(&patcher, file)19    err = format.Node(&buf, fset, file)20    if err != nil {21        panic(err)22    }23    fmt.Println(buf.String())24}25type astPatcher struct {26}27func (p *astPatcher) Visit(node ast.Node) ast.Visitor {28    switch n := node.(type) {29        obj := p.info.ObjectOf(n)30        if obj != nil && obj.Type() != nil {31        }32    }33}34import "fmt"35func main() {36    fmt.Println(42)37}

patchConst

Using AI Code Generation

1import (2func main() {3	f, err := parser.ParseFile(fset, "2.go", nil, parser.ParseComments)4	if err != nil {5		log.Fatal(err)6	}7	fmt.Println("Imports:")8	for _, s := range f.Imports {9		fmt.Println("\t", s.Path.Value)10	}11	fmt.Println("Doc:")12	fmt.Println("\t", f.Doc.Text())13	fmt.Println("Consts:")14	for _, s := range f.Decls {15		if genDecl, ok := s.(*ast.GenDecl); ok {16			if genDecl.Tok == token.CONST {17				for _, spec := range genDecl.Specs {18					if valueSpec, ok := spec.(*ast.ValueSpec); ok {19						fmt.Println("\t", valueSpec.Names[0].Name)20					}21				}22			}23		}24	}25	fmt.Println("Funcs:")26	for _, s := range f.Decls {27		if funcDecl, ok := s.(*ast.FuncDecl); ok {28			fmt.Println("\t", funcDecl.Name.Name)29		}30	}31	fmt.Println("Types:")32	for _, s := range f.Decls {33		if typeSpec, ok := s.(*ast.GenDecl); ok {34			if typeSpec.Tok == token.TYPE {35				for _, spec := range typeSpec.Specs {36					if typeSpec, ok := spec.(*ast.TypeSpec); ok {37						fmt.Println("\t", typeSpec.Name.Name)38					}39				}40			}41		}42	}43	fmt.Println("Vars:")44	for _, s := range f.Decls {45		if varSpec, ok := s.(*ast

patchConst

Using AI Code Generation

1compiler.patchConst(2, 5);2compiler.patchConst(3, 6);3compiler.patchConst(4, 7);4compiler.patchConst(5, 8);5compiler.patchConst(6, 9);6compiler.patchConst(7, 10);7compiler.patchConst(8, 11);8compiler.patchConst(9, 12);9compiler.patchConst(10, 13);10compiler.patchConst(11, 14);11compiler.patchConst(12, 15);12compiler.patchConst(13, 16);13compiler.patchConst(14, 17);14compiler.patchConst(15, 18);15compiler.patchConst(16, 19);16compiler.patchConst(17, 20);17compiler.patchConst(18, 21);18compiler.patchConst(19, 22);19compiler.patchConst(20, 23);20compiler.patchConst(21, 24);21compiler.patchConst(22, 25);22compiler.patchConst(23, 26);23compiler.patchConst(24, 27);24compiler.patchConst(25, 28);25compiler.patchConst(

patchConst

Using AI Code Generation

1import (2func main() {3    fmt.Println("x:", x)4    patchConst(&x, 20)5    fmt.Println("x:", x)6}7import (8func main() {9    fmt.Println("x:", x)10    patchConst(&x, 20)11    fmt.Println("x:", x)12}13import (14func main() {15    fmt.Println("x:", x)16    patchConst(&x, 20)17    fmt.Println("x:", x)18}19import (20func main() {21    fmt.Println("x:", x)22    patchConst(&x, 20)23    fmt.Println("x:", x)24}25import (26func main() {27    fmt.Println("x:", x)28    patchConst(&x, 20)29    fmt.Println("x:", x)30}31import (32func main() {33    fmt.Println("x:", x)34    patchConst(&x, 20)35    fmt.Println("x:", x)36}37import (38func main() {39    fmt.Println("x:", x)40    patchConst(&x, 20)41    fmt.Println("x:", x)42}43import (44func main() {45    fmt.Println("x:", x)46    patchConst(&x,

patchConst

Using AI Code Generation

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

patchConst

Using AI Code Generation

1import (2func main() {3	value := reflect.ValueOf(v)4	address := reflect.ValueOf(&v).Elem()5	typeOfV := value.Type()6	newValue := reflect.New(typeOfV).Elem()7	newValue.SetInt(2)8	address.Set(newValue)9}10import (11func main() {12	value := reflect.ValueOf(v)13	address := reflect.ValueOf(&v).Elem()14	typeOfV := value.Type()15	newValue := reflect.New(typeOfV).Elem()16	newValue.SetInt(2)17	address.Set(newValue)18}19import (20func main() {21	value := reflect.ValueOf(v)22	address := reflect.ValueOf(&v).Elem()23	typeOfV := value.Type()24	newValue := reflect.New(typeOfV).Elem()25	newValue.SetInt(2)26	address.Set(newValue)27}28import (

patchConst

Using AI Code Generation

1import "fmt"2type cp_info struct {3}4type constant_pool struct {5}6type compiler struct {7}8func (c compiler) patchConst() {9c.cp.cp[2].info = []uint8{1, 2, 3, 4}10}11func (c compiler) printConst() {12for i := 0; i < len(c.cp.cp); i++ {13fmt.Println(c.cp.cp[i].info)14}15}16func main() {17c := compiler{cp: constant_pool{cp: []cp_info{{tag: 1, info: []uint8{1, 2, 3, 4}}, {tag: 2, info: []uint8{1, 2, 3, 4}}, {tag: 3, info: []uint8{1, 2, 3, 4}}}}}18c.patchConst()19c.printConst()20}21import "fmt"22type cp_info struct {23}24type constant_pool struct {25}26type compiler struct {27}28func (c compiler) patchConst() {29c.cp.cp[2].info = []uint8{1, 2, 3, 4}30}31func (c compiler) print

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