KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

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}

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.