}

// CheckPtrAlignmentNilPtr tests that checkptrAlignment doesn't crash
// on nil pointers (#47430).
func CheckPtrAlignmentNilPtr() {
	var do func(int)
	do = func(n int) {
		// Inflate the stack so runtime.shrinkstack gets called during GC
		if n > 0 {
			do(n - 1)
		}

		var p unsafe.Pointer
		_ = (*int)(p)
	}

	go func() {
		for {
			runtime.GC()
		}
	}()

	go func() {

// spanSetBlockAlloc represents a concurrent pool of spanSetBlocks.
type spanSetBlockAlloc struct {
	stack lfstack
}

// alloc tries to grab a spanSetBlock out of the pool, and if it fails
// persistentallocs a new one and returns it.
func (p *spanSetBlockAlloc) alloc() *spanSetBlock {
	if s := (*spanSetBlock)(p.stack.pop()); s != nil {
		return s
	}

}

// flush empties out unallocated free pages in the given cache
// into s. Then, it clears the cache, such that empty returns
// true.
//
// p.mheapLock must be held.
//
// Must run on the system stack because p.mheapLock must be held.
//
//go:systemstack
func (c *pageCache) flush(p *pageAlloc) {
	assertLockHeld(p.mheapLock)

	if c.empty() {
		return
	}
	ci := chunkIndex(c.base)

	}
	return i;
#else
	return 0;
#endif
}
*/
import "C"

import (
	"internal/testenv"
	"reflect"
	"runtime"
	"strings"
	"testing"
	"unsafe"
)

// Test that the stack can be unwound through a call out and call back
// into Go.
func testCallbackCallersSEH(t *testing.T) {
	testenv.SkipIfOptimizationOff(t) // This test requires inlining.
	if runtime.Compiler != "gc" {

// Factorial

var results = [...]int{
	1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800,
	39916800, 479001600,
}

func main() {
	max := 9
	if runtime.GOARCH == "wasm" {
		max = 7 // stack size is limited
	}
	for i := 0; i <= max; i++ {
		if f := count(fact(gen(i))); f != results[i] {
			println("FAIL:", i, "!:", f, "!=", results[i])
			panic(0)
		}
	}

			rv = AnyValue(fmt.Errorf("LogValue panicked\n%s", stack(3, 5)))
		}
	}()

	for i := 0; i < maxLogValues; i++ {
		if v.Kind() != KindLogValuer {
			return v
		}
		v = v.LogValuer().LogValue()
	}
	err := fmt.Errorf("LogValue called too many times on Value of type %T", orig.Any())
	return AnyValue(err)
}

func stack(skip, nFrames int) string {
	pcs := make([]uintptr, nFrames+1)

	if !ok {
		v.Fatalf("store aux is not a type: %s", v.LongString())
	}
	if !t.HasPointers() {
		return false
	}
	dst := v.Args[0]
	if IsStackAddr(dst) {
		return false // writes into the stack don't need write barrier
	}
	// If we're writing to a place that might have heap pointers, we need
	// the write barrier.
	if mightContainHeapPointer(dst, t.Size(), v.MemoryArg(), zeroes) {
		return true
	}

	}
}

// filterStackRootFunc returns an event filter that returns true if the function
// at the root of the stack trace is named name.
func filterStackRootFunc(name string) eventFilterFn {
	return func(e *format.Event, data *format.Data) bool {
		frames := stackFrames(data, e.Stack)
		rootFrame := frames[len(frames)-1]
		return strings.HasPrefix(rootFrame, name+":")
	}
}

// they might have been locked at the time of the fork. This means
// no rescheduling, no malloc calls, and no new stack segments.
// For the same reason compiler does not race instrument it.
// The calls to RawSyscall are okay because they are assembly
// functions that do not grow the stack.
//
//go:norace

// license that can be found in the LICENSE file.

// This file implements API tests across platforms and should never have a build
// constraint.

package net

import (
	"os"
	"testing"
)

// The full stack test cases for IPConn have been moved to the
// following:
//	golang.org/x/net/ipv4
//	golang.org/x/net/ipv6
//	golang.org/x/net/icmp

func packetConnTestData(t *testing.T, network string) ([]byte, func()) {