// (like StoreNoWB but with the write barrier).
//
//go:nosplit
//go:linkname atomic_storePointer internal/runtime/atomic.storePointer
func atomic_storePointer(ptr *unsafe.Pointer, new unsafe.Pointer) {
	atomicstorep(unsafe.Pointer(ptr), new)
}

// atomic_casPointer is the implementation of runtime/internal/UnsafePointer.CompareAndSwap

package runtime

import (
	"internal/cpu"
	"internal/goarch"
	"internal/runtime/atomic"
	"runtime/internal/sys"
	"unsafe"
)

type traceMap struct {
	root atomic.UnsafePointer // *traceMapNode (can't use generics because it's notinheap)
	_    cpu.CacheLinePad
	seq  atomic.Uint64
	_    cpu.CacheLinePad
	mem  traceRegionAlloc
}

// It holds a linked list of traceRegionAllocBlock.
type traceRegionAlloc struct {
	lock     mutex
	dropping atomic.Bool          // For checking invariants.
	current  atomic.UnsafePointer // *traceRegionAllocBlock
	full     *traceRegionAllocBlock
}

// traceRegionAllocBlock is a block in traceRegionAlloc.
//
// traceRegionAllocBlock is allocated from non-GC'd memory, so it must not

	Float64:       {Float64, IsFloat, "float64"},
	Complex64:     {Complex64, IsComplex, "complex64"},
	Complex128:    {Complex128, IsComplex, "complex128"},
	String:        {String, IsString, "string"},
	UnsafePointer: {UnsafePointer, 0, "Pointer"},

	UntypedBool:    {UntypedBool, IsBoolean | IsUntyped, "untyped bool"},
	UntypedInt:     {UntypedInt, IsInteger | IsUntyped, "untyped int"},

	Float64:       {Float64, IsFloat, "float64"},
	Complex64:     {Complex64, IsComplex, "complex64"},
	Complex128:    {Complex128, IsComplex, "complex128"},
	String:        {String, IsString, "string"},
	UnsafePointer: {UnsafePointer, 0, "Pointer"},

	UntypedBool:    {UntypedBool, IsBoolean | IsUntyped, "untyped bool"},
	UntypedInt:     {UntypedInt, IsInteger | IsUntyped, "untyped int"},

	types.Typ[types.UntypedRune],
	types.Typ[types.UntypedFloat],
	types.Typ[types.UntypedComplex],
	types.Typ[types.UntypedString],
	types.Typ[types.UntypedNil],

	// package unsafe
	types.Typ[types.UnsafePointer],

	// invalid type
	types.Typ[types.Invalid], // only appears in packages with errors

	// used internally by gc; never used by this package or in .a files
	// not to be confused with the universe any

	case reflect.Bool:
		a, b := aVal.Bool(), bVal.Bool()
		switch {
		case a == b:
			return 0
		case a:
			return 1
		default:
			return -1
		}
	case reflect.Pointer, reflect.UnsafePointer:
		return cmp.Compare(aVal.Pointer(), bVal.Pointer())
	case reflect.Chan:
		if c, ok := nilCompare(aVal, bVal); ok {
			return c
		}
		return cmp.Compare(aVal.Pointer(), bVal.Pointer())
	case reflect.Struct:

	case Uintptr:
		*(*uintptr)(v.ptr) = uintptr(x)
	}
}

// SetPointer sets the [unsafe.Pointer] value v to x.
// It panics if v's Kind is not [UnsafePointer].
func (v Value) SetPointer(x unsafe.Pointer) {
	v.mustBeAssignable()
	v.mustBe(UnsafePointer)
	*(*unsafe.Pointer)(v.ptr) = x
}

// SetString sets v's underlying value to x.
// It panics if v's Kind is not [String] or if [Value.CanSet] returns false.

	return (*bool)(v.FieldByName(name).Addr().UnsafePointer())
}

// stringFieldAddr(conf, name) returns the address of the string field conf.<name>.
// For accessing unexported fields.
func stringFieldAddr(conf *Config, name string) *string {
	v := reflect.Indirect(reflect.ValueOf(conf))
	return (*string)(v.FieldByName(name).Addr().UnsafePointer())
}

	// of v.
	return (*abi.Type)(abi.NoEscape(unsafe.Pointer(v.typ_)))
}

// pointer returns the underlying pointer represented by v.
// v.Kind() must be Pointer, Map, Chan, Func, or UnsafePointer
func (v Value) pointer() unsafe.Pointer {
	if v.typ().Size() != goarch.PtrSize || !v.typ().Pointers() {
		panic("can't call pointer on a non-pointer Value")
	}
	if v.flag&flagIndir != 0 {