package slog_test

import "log/slog"

type Name struct {
	First, Last string
}

// LogValue implements slog.LogValuer.
// It returns a group containing the fields of
// the Name, so that they appear together in the log output.
func (n Name) LogValue() slog.Value {
	return slog.GroupValue(
		slog.String("first", n.First),
		slog.String("last", n.Last))
}

func ExampleLogValuer_group() {

		// reading the value to take back ownership of this
		// slot.
		head--
		ptrs2 := d.pack(head, tail)
		if d.headTail.CompareAndSwap(ptrs, ptrs2) {
			// We successfully took back slot.
			slot = &d.vals[head&uint32(len(d.vals)-1)]
			break
		}
	}

	val := *(*any)(unsafe.Pointer(slot))
	if val == dequeueNil(nil) {
		val = nil
	}
	// Zero the slot. Unlike popTail, this isn't racing with

	u += 1<<13 - 1                  // add almost a page

	for i := 0; i < 1000000; i++ {
		_ = identity(u)         // installs u at return slot
		_ = liveReturnSlot(nil) // incorrectly marks return slot as live
	}
}

//go:noinline
func liveReturnSlot(x *int) *int {
	defer func() {}() // causes return slot to be marked live
	sink = &x         // causes x to be moved to the heap, triggering allocation
	return x
}

//go:noinline

// before switching over to Index.
// n is the number of bytes processed so far.
// See the bytes.Index implementation for details.
func Cutover(n int) int {
	// 1 error per 8 characters, plus a few slop to start.
	return (n + 16) / 8

// before switching over to Index.
// n is the number of bytes processed so far.
// See the bytes.Index implementation for details.
func Cutover(n int) int {
	// 1 error per 8 characters, plus a few slop to start.
	return (n + 16) / 8

// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname atomicwb
//go:nosplit
func atomicwb(ptr *unsafe.Pointer, new unsafe.Pointer) {
	slot := (*uintptr)(unsafe.Pointer(ptr))
	buf := getg().m.p.ptr().wbBuf.get2()
	buf[0] = *slot
	buf[1] = uintptr(new)
}

// atomicstorep performs *ptr = new atomically and invokes a write barrier.
//
//go:nosplit

// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

// The stubs for the C functions read and write the same slot on the
// g0 stack when copying arguments in and out.

/*
#cgo CFLAGS: -fsanitize=thread
#cgo LDFLAGS: -fsanitize=thread

int Func1() {
	return 0;
}

void Func2(int x) {
	(void)x;
}
*/

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Make sure a pointer variable and a zero-sized variable
// aren't allocated to the same stack slot.
// See issue 24993.

package codegen

func zeroSize() {
	c := make(chan struct{})
	// amd64:`MOVQ\t\$0, command-line-arguments\.s\+56\(SP\)`
	var s *int

func uint32tofloat64(a uint32) float64

// stackcheck checks that SP is in range [g->stack.lo, g->stack.hi).
func stackcheck()

// Called from assembly only; declared for go vet.
func setldt(slot uintptr, base unsafe.Pointer, size uintptr)
func emptyfunc()

//go:noescape
func asmcgocall_no_g(fn, arg unsafe.Pointer)

// getfp returns the frame pointer register of its caller or 0 if not implemented.

	// See issue #19067.
	c := testConfig(t)
	ptrType := c.config.Types.BytePtr
	fun := c.Fun("entry",
		Bloc("entry",
			Valu("start", OpInitMem, types.TypeMem, 0, nil),
			Valu("sb", OpSB, c.config.Types.Uintptr, 0, nil),
			Valu("sp", OpSP, c.config.Types.Uintptr, 0, nil),
			Goto("loop")),
		Bloc("loop",
			Valu("phi", OpPhi, types.TypeMem, 0, nil, "start", "wb"),
			Valu("v", OpConstNil, ptrType, 0, nil),