How to use constOverflowsBase method of compiler Package

Best Syzkaller code snippet using compiler.constOverflowsBase

types.go

Source:types.go

...277	Args:         []namedArg{{Name: "value", Type: typeArgInt}},278	CheckConsts: func(comp *compiler, t *ast.Type, args []*ast.Type, base prog.IntTypeCommon) {279		v := args[0].Value280		bitSize := base.TypeBitSize()281		if constOverflowsBase(v, base) {282			comp.error(args[0].Pos, "const val 0x%x does not fit into %v bits", v, bitSize)283		}284		args[0].Value = v & (uint64(1)<<bitSize - 1)285	},286	Gen: func(comp *compiler, t *ast.Type, args []*ast.Type, base prog.IntTypeCommon) prog.Type {287		return &prog.ConstType{288			IntTypeCommon: base,289			Val:           args[0].Value,290		}291	},292}293func constOverflowsBase(v uint64, base prog.IntTypeCommon) bool {294	size := base.TypeBitSize()295	if size == 64 {296		return false297	}298	mask := uint64(1)<<size - 1299	v1 := v & mask300	if int64(v1<<(64-size)) < 0 && int64(v) < 0 {301		v1 |= ^mask302	}303	return v1 != v304}305var typeArgLenTarget = &typeArg{306	Kind:     kindIdent,307	MaxColon: 10,308}309var typeFlags = &typeDesc{310	Names:        []string{"flags"},311	CanBeArgRet:  canBeArg,312	CanBeTypedef: true,313	CantBeOpt:    true,314	NeedBase:     true,315	Args:         []namedArg{{Name: "flags", Type: typeArgFlags}},316	CheckConsts: func(comp *compiler, t *ast.Type, args []*ast.Type, base prog.IntTypeCommon) {317		name := args[0].Ident318		if name == "xdp_mmap_offsets" && comp.ptrSize == 4 {319			// TODO(dvyukov): this sucks a lot. It seems that out 32-bit mmap is wrong.320			// The syscall accepts number of pages as int32, but we pass offset in bytes.321			// As the result large XDP consts don't fit into the arg.322			return323		}324		f := comp.intFlags[name]325		for _, val := range f.Values {326			if constOverflowsBase(val.Value, base) {327				comp.error(args[0].Pos, "%v %v=0x%x doesn't fit into %v bits",328					name, val.Ident, val.Value, base.TypeBitSize())329			}330		}331	},332	Gen: func(comp *compiler, t *ast.Type, args []*ast.Type, base prog.IntTypeCommon) prog.Type {333		name := args[0].Ident334		base.TypeName = name335		f := comp.intFlags[name]336		values := genIntArray(f.Values)337		if len(values) == 0 || len(values) == 1 && values[0] == 0 {338			// We can get this if all values are unsupported consts.339			// Also generate const[0] if we have only 1 flags value which is 0,340			// this is the intention in all existing cases (e.g. an enum with types...

constOverflowsBase

Using AI Code Generation

1import (2func main() {3	f, err := parser.ParseFile(fset, "1.go", nil, parser.ParseComments)4	if err != nil {5		fmt.Println(err)6	}7	ast.Inspect(f, func(n ast.Node) bool {8		switch x := n.(type) {9			if x.Op == token.SHL {10				fmt.Println(fset.Position(x.Pos()), fset.Position(x.End()))11				fmt.Println(x.X, x.Op, x.Y)12			}13		}14	})15}16import "fmt"17func main() {18	fmt.Println(a)19}

constOverflowsBase

Using AI Code Generation

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

constOverflowsBase

Using AI Code Generation

1import (2func main() {3	constOverflowsBase()4}5func constOverflowsBase() {6const (7	fset := token.NewFileSet()8	f, err := parser.ParseFile(fset, "src.go", src, parser.Mode(0))9	if err != nil {10		panic(err)11	}12	for _, decl := range f.Decls {13		gd, ok := decl.(*ast.GenDecl)14		if !ok {15		}16		for _, spec := range gd.Specs {17			vs, ok := spec.(*ast.ValueSpec)18			if !ok {19			}20			for _, name := range vs.Names {21				fmt.Printf("%s = %s22			}23		}24	}25}

constOverflowsBase

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println(c)4}5main.main()6func (c *compiler) constOverflowsBase(base, constant interface{}, op token.Token) bool {7    switch base := base.(type) {8        switch base.Kind() {9            return constant.OverflowInt64(base, op)10            return constant.OverflowUint64(base, op)11            return constant.OverflowFloat64(base, op)12            return constant.OverflowComplex64(base, op)13        }14    }15}16func (c *compiler) constOverflowsBase(base, constant interface{}, op token.Token) bool {17    switch base := base.(type) {18        switch base.Kind() {19            return constant.OverflowInt64(base, op)20            return constant.OverflowUint64(base, op)21            return constant.OverflowFloat64(base, op)

constOverflowsBase

Using AI Code Generation

1import "fmt"2func main() {3    fmt.Println(a + b)4}5import "fmt"6func main() {7    fmt.Println(a + b)8}9import "fmt"10func main() {11    fmt.Println(a + b)12}13import "fmt"14func main() {15    fmt.Println(a + b)16}17import "fmt"18func main() {19    fmt.Println(a + b)20}21import "fmt"22func main() {23    fmt.Println(a + b)24}25import "fmt"26func main() {27    fmt.Println(a + b)28}29import "fmt"30func main() {31    fmt.Println(a + b)32}33import "fmt"34func main() {35    fmt.Println(a + b)36}37import "fmt"38func main()

constOverflowsBase

Using AI Code Generation

1func main() {2    println(c)3}4func main() {5    println(c)6}7func main() {8    println(c)9}10func main() {11    println(c)12}13func main() {14    println(c)15}16func main() {17    println(c)18}19func main() {20    println(c)21}22func main() {

constOverflowsBase

Using AI Code Generation

1func main() {2}3func main() {4}5func main() {6}7func main() {8}9func main() {10}11func main() {12}13func main() {14}

constOverflowsBase

Using AI Code Generation

1func main() {2    fmt.Println("Hello, playground")3    fmt.Println("Int8Max:", math.MaxInt8)4    fmt.Println("Int8Min:", math.MinInt8)5    fmt.Println("Int16Max:", math.MaxInt16)6    fmt.Println("Int16Min:", math.MinInt16)7    fmt.Println("Int32Max:", math.MaxInt32)8    fmt.Println("Int32Min:", math.MinInt32)9    fmt.Println("Int64Max:", math.MaxInt64)10    fmt.Println("Int64Min:", math.MinInt64)11    fmt.Println("Uint8Max:", math.MaxUint8)12    fmt.Println("Uint16Max:", math.MaxUint16)13    fmt.Println("Uint32Max:", math.MaxUint32)14    fmt.Println("Uint64Max:", math.MaxUint64)15}16func main() {17    fmt.Println("Hello, playground")18    fmt.Println("Int8Max:", math.MaxInt8)19    fmt.Println("Int8Min:", math.MinInt8)20    fmt.Println("Int16Max:", math.MaxInt16)21    fmt.Println("Int16Min:", math.MinInt16)22    fmt.Println("Int32Max:", math.MaxInt32)23    fmt.Println("Int32Min:", math.MinInt32)24    fmt.Println("Int64Max:", math.MaxInt64)25    fmt.Println("Int64Min:", math.MinInt64)26    fmt.Println("Uint8Max:", math.MaxUint8)27    fmt.Println("Uint16Max:", math.MaxUint16)28    fmt.Println("Uint32Max:", math.MaxUint32)29    fmt.Println("Uint64Max:", math.MaxUint64)30}

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