Merge pull request #12075 from cuiweixie:reflect.TypeFor

PiperOrigin-RevId: 800676458

Author: gvisor-bot

pkg/ring0/kernel_amd64.go

@@ -32,7 +32,7 @@ func HaltAndWriteFSBase(regs *arch.Registers)
 
 // init initializes architecture-specific state.
 func (k *Kernel) init(maxCPUs int) {
-	entrySize := reflect.TypeOf(kernelEntry{}).Size()
+	entrySize := reflect.TypeFor[kernelEntry]().Size()
 	var (
 		entries []kernelEntry
 		padding = 1
@@ -51,7 +51,7 @@ func (k *Kernel) init(maxCPUs int) {
 	k.cpuEntries = entries
 
 	k.globalIDT = &idt64{}
-	if reflect.TypeOf(idt64{}).Size() != hostarch.PageSize {
+	if reflect.TypeFor[idt64]().Size() != hostarch.PageSize {
 		panic("Size of globalIDT should be PageSize")
 	}
 	if reflect.ValueOf(k.globalIDT).Pointer()&(hostarch.PageSize-1) != 0 {
@@ -77,12 +77,12 @@ func (k *Kernel) EntryRegions() map[uintptr]uintptr {
 	regions := make(map[uintptr]uintptr)
 
 	addr := reflect.ValueOf(&k.cpuEntries[0]).Pointer()
-	size := reflect.TypeOf(kernelEntry{}).Size() * uintptr(len(k.cpuEntries))
+	size := reflect.TypeFor[kernelEntry]().Size() * uintptr(len(k.cpuEntries))
 	end, _ := hostarch.Addr(addr + size).RoundUp()
 	regions[uintptr(hostarch.Addr(addr).RoundDown())] = uintptr(end)
 
 	addr = reflect.ValueOf(k.globalIDT).Pointer()
-	size = reflect.TypeOf(idt64{}).Size()
+	size = reflect.TypeFor[idt64]().Size()
 	end, _ = hostarch.Addr(addr + size).RoundUp()
 	regions[uintptr(hostarch.Addr(addr).RoundDown())] = uintptr(end)
 

pkg/sentry/kernel/seccomp.go

@@ -199,7 +199,7 @@ func (t *Task) evaluateSyscallFilters(sysno int32, args arch.SyscallArguments, i
 func checkFilterCacheability(program bpf.Program, input bpf.Input) (uint32, error) {
 	// Look up Nr and Arch fields, we'll use their offsets later
 	// to verify whether they were accessed.
-	sdType := reflect.TypeOf(linux.SeccompData{})
+	sdType := reflect.TypeFor[linux.SeccompData]()
 	nrField, ok := sdType.FieldByName("Nr")
 	if !ok {
 		panic("linux.SeccompData.Nr field not found")

pkg/state/types.go

@@ -295,23 +295,23 @@ const interfaceType = "interface"
 var primitiveTypeDatabase = func() map[string]reflect.Type {
 	r := make(map[string]reflect.Type)
 	for _, t := range []reflect.Type{
-		reflect.TypeOf(false),
-		reflect.TypeOf(int(0)),
-		reflect.TypeOf(int8(0)),
-		reflect.TypeOf(int16(0)),
-		reflect.TypeOf(int32(0)),
-		reflect.TypeOf(int64(0)),
-		reflect.TypeOf(uint(0)),
-		reflect.TypeOf(uintptr(0)),
-		reflect.TypeOf(uint8(0)),
-		reflect.TypeOf(uint16(0)),
-		reflect.TypeOf(uint32(0)),
-		reflect.TypeOf(uint64(0)),
-		reflect.TypeOf(""),
-		reflect.TypeOf(float32(0.0)),
-		reflect.TypeOf(float64(0.0)),
-		reflect.TypeOf(complex64(0.0)),
-		reflect.TypeOf(complex128(0.0)),
+		reflect.TypeFor[bool](),
+		reflect.TypeFor[int](),
+		reflect.TypeFor[int8](),
+		reflect.TypeFor[int16](),
+		reflect.TypeFor[int32](),
+		reflect.TypeFor[int64](),
+		reflect.TypeFor[uint](),
+		reflect.TypeFor[uintptr](),
+		reflect.TypeFor[uint8](),
+		reflect.TypeFor[uint16](),
+		reflect.TypeFor[uint32](),
+		reflect.TypeFor[uint64](),
+		reflect.TypeFor[string](),
+		reflect.TypeFor[float32](),
+		reflect.TypeFor[float64](),
+		reflect.TypeFor[complex64](),
+		reflect.TypeFor[complex128](),
 	} {
 		r[t.Name()] = t
 	}

pkg/sync/locking/generic_mutex.go

@@ -74,5 +74,5 @@ func initLockNames() {}
 
 func init() {
 	initLockNames()
-	genericMarkIndex = locking.NewMutexClass(reflect.TypeOf(Mutex{}), lockNames)
+	genericMarkIndex = locking.NewMutexClass(reflect.TypeFor[Mutex](), lockNames)
 }

pkg/sync/locking/generic_rwmutex.go

@@ -106,5 +106,5 @@ func initLockNames() {}
 
 func init() {
 	initLockNames()
-	genericMarkIndex = locking.NewMutexClass(reflect.TypeOf(RWMutex{}), lockNames)
+	genericMarkIndex = locking.NewMutexClass(reflect.TypeFor[RWMutex](), lockNames)
 }

pkg/urpc/urpc.go

@@ -266,7 +266,7 @@ func (s *Server) Register(obj any) {
 			// Need single return.
 			panic(fmt.Sprintf("method %s has wrong number of returns.", prettyName))
 		}
-		if returnType := mtype.Out(0); returnType != reflect.TypeOf((*error)(nil)).Elem() {
+		if returnType := mtype.Out(0); returnType != reflect.TypeFor[error]() {
 			// Need error return.
 			panic(fmt.Sprintf("method %s has non-error return value.", prettyName))
 		}

test/packetimpact/testbench/layers.go

@@ -159,7 +159,7 @@ func stringLayer(l Layer) string {
 		v = reflect.Indirect(v)
 		switch {
 		// Try to use Stringers appropriately.
-		case v.Type().Implements(reflect.TypeOf((*fmt.Stringer)(nil)).Elem()):
+		case v.Type().Implements(reflect.TypeFor[fmt.Stringer]()):
 			ret = append(ret, fmt.Sprintf("%s:%v", t.Name, v))
 		// Print byte slices as hex.
 		case v.Kind() == reflect.Slice && v.Type().Elem().Kind() == reflect.Uint8: