}
	return funcs
}

// This is a regression test for https://go.dev/issue/64528 .
func TestGenericsHashKeyInPprofBuilder(t *testing.T) {
	previousRate := runtime.MemProfileRate
	runtime.MemProfileRate = 1
	defer func() {
		runtime.MemProfileRate = previousRate
	}()
	for _, sz := range []int{128, 256} {
		genericAllocFunc[uint32](sz / 4)
	}
	for _, sz := range []int{32, 64} {
		genericAllocFunc[uint64](sz / 8)

// runtime.MemProfileRate, which this test checks.
func TestMemProfileCheck(t *testing.T) {
	testenv.MustHaveGoBuild(t)
	t.Parallel()

	tests := []struct {
		name    string
		prog    string
		wantOut string
	}{
		{
			"no_memprofile",
			`
package main
import "runtime"
func main() {
	println(runtime.MemProfileRate)
}
`,
			"0",
		},
		{

	cpuprofile        = flag.String("cpuprofile", "", "write cpu profile to `file`")
	memprofile        = flag.String("memprofile", "", "write memory profile to `file`")
	memprofilerate    = flag.Int64("memprofilerate", 0, "set runtime.MemProfileRate to `rate`")
	benchmarkFlag     = flag.String("benchmark", "", "set to 'mem' or 'cpu' to enable phase benchmarking")

var cpuprofileflag = flag.String("cpuprofile", "", "Write CPU profile to specified file")
var memprofileflag = flag.String("memprofile", "", "Write memory profile to specified file")
var memprofilerateflag = flag.Int("memprofilerate", 0, "Set memprofile sampling rate to value")

var matchpkg func(name string) bool

var atExitFuncs []func()

func atExit(f func()) {
	atExitFuncs = append(atExitFuncs, f)
}

func Exit(code int) {

	rv.Call(nil)
}

var memoryProfilerRun = 0

func TestMemoryProfiler(t *testing.T) {
	// Disable sampling, otherwise it's difficult to assert anything.
	oldRate := runtime.MemProfileRate
	runtime.MemProfileRate = 1
	defer func() {
		runtime.MemProfileRate = oldRate
	}()

	// Allocate a meg to ensure that mcache.nextSample is updated to 1.
	for i := 0; i < 1024; i++ {
		memSink = make([]byte, 1024)
	}

	"runtime/pprof"
)

func init() {
	register("MemProf", MemProf)
}

var memProfBuf bytes.Buffer
var memProfStr string

func MemProf() {
	// Force heap sampling for determinism.
	runtime.MemProfileRate = 1

	for i := 0; i < 10; i++ {
		fmt.Fprintf(&memProfBuf, "%*d\n", i, i)
	}
	memProfStr = memProfBuf.String()

	runtime.GC()

	f, err := os.CreateTemp("", "memprof")
	if err != nil {

	memProfile     = flag.String("test.memprofile", "", "write a memory profile to the named file after execution")
	memProfileRate = flag.Int("test.memprofilerate", 0, "if >=0, sets runtime.MemProfileRate")
	cpuProfile     = flag.String("test.cpuprofile", "", "write a cpu profile to the named file during execution")

	"fullpath":             true,
	"fuzz":                 true,
	"fuzzminimizetime":     true,
	"fuzztime":             true,
	"list":                 true,
	"memprofile":           true,
	"memprofilerate":       true,
	"mutexprofile":         true,
	"mutexprofilefraction": true,
	"outputdir":            true,
	"parallel":             true,
	"run":                  true,
	"short":                true,

void poison() __attribute__ ((weak));

// Poison the stack.
void poison() {
	char a[1024];
	Nop(&a[0]);
}

*/
import "C"

import (
	"runtime"
)

func main() {
	runtime.MemProfileRate = 1
	start(100)
}

func start(i int) {
	if i == 0 {
		return
	}
	C.poison()
	// Tie up a thread.
	// We won't actually wait for this sleep to complete.
	go func() { C.sleep(1) }()
	start(i - 1)

	}
}

func receiver(c, dummy chan int, n int) {
	for i := 0; i < n; i++ {
		select {
		case <-c:
			// nothing
		case <-dummy:
			panic("dummy")
		}
	}
}

func main() {
	runtime.MemProfileRate = 0

	c := make(chan int)
	dummy := make(chan int)

	// warm up
	go sender(c, 100000)
	receiver(c, dummy, 100000)
	runtime.GC()
	memstats := new(runtime.MemStats)
	runtime.ReadMemStats(memstats)