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How to use unsafeReflectValue method of dark Package

Best Go-testdeep code snippet using dark.unsafeReflectValue

bypass.go

Source:bypass.go

...17// when the code is not running on Google App Engine, compiled by GopherJS, and18// "-tags safe" is not added to the go build command line.  The "disableunsafe"19// tag is deprecated and thus should not be used.20// Go versions prior to 1.4 are disabled because they use a different layout21// for interfaces which make the implementation of unsafeReflectValue more complex.22//go:build !js && !appengine && !safe && !disableunsafe && go1.423// +build !js,!appengine,!safe,!disableunsafe,go1.424package dark25import (26	"reflect"27	"unsafe"28)29const (30	// UnsafeDisabled is a build-time constant which specifies whether or31	// not access to the unsafe package is available.32	UnsafeDisabled = false33	// ptrSize is the size of a pointer on the current arch.34	ptrSize = unsafe.Sizeof((*byte)(nil))35)36type flag uintptr37var (38	// flagRO indicates whether the value field of a reflect.Value39	// is read-only.40	flagRO flag41	// flagAddr indicates whether the address of the reflect.Value's42	// value may be taken.43	flagAddr flag44)45// flagKindMask holds the bits that make up the kind46// part of the flags field. In all the supported versions,47// it is in the lower 5 bits.48const flagKindMask = flag(0x1f)49// Different versions of Go have used different50// bit layouts for the flags type. This table51// records the known combinations.52var okFlags = []struct {53	ro, addr flag54}{{55	// From Go 1.4 to 1.556	ro:   1 << 5,57	addr: 1 << 7,58}, {59	// Up to Go tip.60	ro:   1<<5 | 1<<6,61	addr: 1 << 8,62}}63var flagValOffset = func() uintptr {64	field, ok := reflect.TypeOf(reflect.Value{}).FieldByName("flag")65	if !ok {66		panic("reflect.Value has no flag field")67	}68	return field.Offset69}()70// flagField returns a pointer to the flag field of a reflect.Value.71func flagField(v *reflect.Value) *flag {72	return (*flag)(unsafe.Pointer(uintptr(unsafe.Pointer(v)) + flagValOffset))73}74// unsafeReflectValue converts the passed reflect.Value into a one that bypasses75// the typical safety restrictions preventing access to unaddressable and76// unexported data.  It works by digging the raw pointer to the underlying77// value out of the protected value and generating a new unprotected (unsafe)78// reflect.Value to it.79//80// This allows us to check for implementations of the Stringer and error81// interfaces to be used for pretty printing ordinarily unaddressable and82// inaccessible values such as unexported struct fields.83func unsafeReflectValue(v reflect.Value) reflect.Value {84	if !v.IsValid() || (v.CanInterface() && v.CanAddr()) {85		return v86	}87	flagFieldPtr := flagField(&v)88	*flagFieldPtr &^= flagRO89	*flagFieldPtr |= flagAddr90	return v91}92// Sanity checks against future reflect package changes93// to the type or semantics of the Value.flag field.94func init() {95	field, ok := reflect.TypeOf(reflect.Value{}).FieldByName("flag")96	if !ok {97		panic("reflect.Value has no flag field")...

bypasssafe.go

Source:bypasssafe.go

...25	// UnsafeDisabled is a build-time constant which specifies whether or26	// not access to the unsafe package is available.27	UnsafeDisabled = true28)29// unsafeReflectValue typically converts the passed reflect.Value into a one30// that bypasses the typical safety restrictions preventing access to31// unaddressable and unexported data.  However, doing this relies on access to32// the unsafe package.  This is a stub version which simply returns the passed33// reflect.Value when the unsafe package is not available.34func unsafeReflectValue(v reflect.Value) reflect.Value {35	return v36}...

interface.go

Source:interface.go

...20	if val.CanInterface() {21		return val.Interface(), true22	}23	if force {24		val = unsafeReflectValue(val)25		if val.CanInterface() {26			return val.Interface(), true27		}28	}29	// For some types, we can copy them in new visitable reflect.Value instances30	copyVal, ok := CopyValue(val)31	if ok && copyVal.CanInterface() {32		return copyVal.Interface(), true33	}34	// For others, in environments where "unsafe" package is not35	// available, we cannot go further36	return nil, false37}38// MustGetInterface does its best to return the data behind val. If it...

unsafeReflectValue

Using AI Code Generation

1import (2type dark struct {3}4func (d *dark) unsafeReflectValue(v interface{}) reflect.Value {5	return reflect.ValueOf(v)6}7func main() {8	d := &dark{}9	v := d.unsafeReflectValue(42)10	fmt.Println(v.Interface())11}

unsafeReflectValue

Using AI Code Generation

1import (2type dark struct {3}4func (d *dark) unsafeReflectValue() reflect.Value {5	return reflect.ValueOf(d).Elem()6}7func main() {8	d.unsafeReflectValue().Set(reflect.ValueOf(100))9	fmt.Println(d)10}

unsafeReflectValue

Using AI Code Generation

1import (2func main() {3	fmt.Println("value of i before function call is ", i)4	unsafeReflectValue(&i)5	fmt.Println("value of i after function call is ", i)6}7func unsafeReflectValue(x interface{}) {8	v := reflect.ValueOf(x)9	v.Elem().SetInt(100)10}

unsafeReflectValue

Using AI Code Generation

1import (2func main() {3	type person struct {4	}5	p := person{name: "John", age: 30}6	v := reflect.ValueOf(p)7	p1 := unsafe.Pointer(v.UnsafeAddr())8	*(*string)(unsafe.Pointer(uintptr(p1) + unsafe.Offsetof(p.name))) = "Jane"9	*(*int)(unsafe.Pointer(uintptr(p1) + unsafe.Offsetof(p.age))) = 4010	fmt.Println(p)11}

unsafeReflectValue

Using AI Code Generation

1import (2type dark struct {3	d func() int4}5func (d *dark) unsafeReflectValue() reflect.Value {6	hdr := (*reflect.SliceHeader)(unsafe.Pointer(&d.c))7	return reflect.ValueOf(d).Elem().FieldByIndex([]int{2}).Slice3(8}9func main() {10	d := &dark{1, "2", []int{3, 4, 5}, func() int { return 6 }}11	fmt.Println(d.unsafeReflectValue())12}

unsafeReflectValue

Using AI Code Generation

1import (2func main() {3	fmt.Println("Value of a is ", a)4	fmt.Println("Address of a is ", &a)5	dark := reflect.ValueOf(&a)6	fmt.Println("Value of dark is ", dark)7	fmt.Println("Address of dark is ", &dark)8	fmt.Println("Address of a is ", dark.Elem().Addr())9	fmt.Println("Value of a is ", dark.Elem().Int())10	fmt.Println("Value of a is ", dark.Elem().Interface())11	fmt.Println("Value of a is ", dark.Elem().Interface().(int))12}

unsafeReflectValue

Using AI Code Generation

1import (2func main() {3	fmt.Println(unsafeReflectValue(i))4	fmt.Println(unsafeReflectValue(str))5	fmt.Println(unsafeReflectValue(f))6}7func unsafeReflectValue(x interface{}) uintptr {8	return *(*uintptr)(unsafe.Pointer(&x))9}

unsafeReflectValue

Using AI Code Generation

1import (2type dark struct {3}4func main() {5	d := dark{"hello"}6	v := reflect.ValueOf(d)7	fmt.Println(v.FieldByName("field1").String())8	fmt.Println(v.FieldByName("field2").String())9}10import (11type dark struct {12}13func main() {14	d := dark{"hello"}15	v := reflect.ValueOf(d)16	fmt.Println(v.FieldByName("field1").String())17	fmt.Println(v.FieldByName("field2").String())18}19import (20type dark struct {21}22func main() {23	d := dark{"hello"}24	v := reflect.ValueOf(d)25	fmt.Println(v.FieldByName("field1").String())26	fmt.Println(v.FieldByName("field2").String())27}28import (29type dark struct {30}31func main() {32	d := dark{"hello"}33	v := reflect.ValueOf(d)34	fmt.Println(v.FieldByName("field1").String())35	fmt.Println(v.FieldByName("field2").String())36}37import (38type dark struct {39}40func main() {41	d := dark{"hello"}42	v := reflect.ValueOf(d)43	fmt.Println(v.FieldByName("field1").String())44	fmt.Println(v.FieldByName

unsafeReflectValue

Using AI Code Generation

1import (2func main() {3	fmt.Println(a)4	fmt.Println(reflect.ValueOf(a))5	fmt.Println(unsafeReflectValue(a))6}7func unsafeReflectValue(x interface{}) reflect.Value {8	v := reflect.ValueOf(x)9	return reflect.NewAt(v.Type(), unsafe.Pointer(v.UnsafeAddr())).Elem()10}

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