}
	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)

	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) {

	"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,

		if seen[key] {
			continue
		}
		if seen != nil {
			seen[key] = true
		}

		// Update MemProfileRate directly here since it
		// is int, not int32, and should only be updated
		// if specified in GODEBUG.
		if seen == nil && key == "memprofilerate" {
			if n, ok := atoi(value); ok {
				MemProfileRate = n
			}
		} else {
			for _, v := range dbgvars {
				if v.name == key {

	of MADV_FREE. This is less efficient, but causes RSS numbers to drop
	more quickly.

	memprofilerate: setting memprofilerate=X will update the value of runtime.MemProfileRate.
	When set to 0 memory profiling is disabled.  Refer to the description of
	MemProfileRate for the default value.

	profstackdepth: profstackdepth=128 (the default) will set the maximum stack

		total.FreeBytes += r.FreeBytes
		total.FreeObjects += r.FreeObjects
	}

	// Technically the rate is MemProfileRate not 2*MemProfileRate,
	// but early versions of the C++ heap profiler reported 2*MemProfileRate,
	// so that's what pprof has come to expect.
	rate := 2 * runtime.MemProfileRate

	// pprof reads a profile with alloc == inuse as being a "2-column" profile

				"the improvements are 'locked in'.", got, tt.minMb)
		}
	})
}

// If this flag is present, it means "testing" was imported by code that is built by the binary
var denylistedFlags = []string{
	"--test.memprofilerate",
}

func runBinariesTest(t *testing.T, f func(t *testing.T, name string)) {
	t.Helper()
	if *releasedir == "" {
		t.Skip("release dir not set")
	}
	binariesToTest := strings.Split(*binaries, " ")

// to sample allocations on average every MemProfileRate bytes, but with a
// completely random distribution over the allocation timeline; this
// corresponds to a Poisson process with parameter MemProfileRate. In Poisson
// processes, the distance between two samples follows the exponential
// distribution (exp(MemProfileRate)), so the best return value is a random

	skip = flag.String("test.skip", "", "do not list or run tests matching `regexp`")
	memProfile = flag.String("test.memprofile", "", "write an allocation profile to `file`")
	memProfileRate = flag.Int("test.memprofilerate", 0, "set memory allocation profiling `rate` (see runtime.MemProfileRate)")
	cpuProfile = flag.String("test.cpuprofile", "", "write a cpu profile to `file`")