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

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)

	flagRandLayout    = flag.Int64("randlayout", 0, "randomize function layout")
	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`")

		},
		{
			"with_memprofile",
			`
package main
import "runtime"
func main() {
	runtime.MemProfile(nil, false)
	println(runtime.MemProfileRate)
}
`,
			"524288",
		},
		{
			"with_memprofile_indirect",
			`
package main
import "runtime"
var f = runtime.MemProfile
func main() {
	if f == nil {
		panic("no f")
	}
	println(runtime.MemProfileRate)
}
`,

			return r.Stack0[0:i]
		}
	}
	return r.Stack0[0:]
}

// MemProfile returns a profile of memory allocated and freed per allocation
// site.
//
// MemProfile returns n, the number of records in the current memory profile.
// If len(p) >= n, MemProfile copies the profile into p and returns n, true.
// If len(p) < n, MemProfile does not change p and returns n, false.
//

// memory profiles to cpu.prof and mem.prof:
//
//	go test -cpuprofile cpu.prof -memprofile mem.prof -bench .
//
// To add equivalent profiling support to a standalone program, add
// code like the following to your main function:
//
//	var cpuprofile = flag.String("cpuprofile", "", "write cpu profile to `file`")
//	var memprofile = flag.String("memprofile", "", "write memory profile to `file`")
//
//	func main() {
//	    flag.Parse()

	// it cannot lead to false failure.
	for i := 0; i < 5; i++ {
		runtime.GC()
		time.Sleep(10 * time.Millisecond)
	}
	// Read memory profile.
	var prof []runtime.MemProfileRecord
	for {
		if n, ok := runtime.MemProfile(prof, false); ok {
			prof = prof[:n]
			break
		} else {
			prof = make([]runtime.MemProfileRecord, n+10)
		}
	}
	// See how much memory in tiny objects is profiled.
	var totalBytes int64

	-linkmode mode
		Set link mode (internal, external, auto).
		This sets the linking mode as described in cmd/cgo/doc.go.
	-linkshared
		Link against installed Go shared libraries (experimental).
	-memprofile file
		Write memory profile to file.
	-memprofilerate rate
		Set runtime.MemProfileRate to rate.
	-msan
		Link with C/C++ memory sanitizer support.
	-o file

	cf.BoolVar(&testFailFast, "failfast", false, "")
	cf.StringVar(&testFuzz, "fuzz", "", "")
	cf.Bool("fullpath", false, "")
	cf.StringVar(&testList, "list", "", "")
	cf.StringVar(&testMemProfile, "memprofile", "", "")
	cf.String("memprofilerate", "", "")
	cf.StringVar(&testMutexProfile, "mutexprofile", "", "")
	cf.String("mutexprofilefraction", "", "")
	cf.Var(&testOutputDir, "outputdir", "")
	cf.Int("parallel", 0, "")

		trace.Stop() // flushes trace to disk
	}
	if *memProfile != "" {
		f, err := os.Create(toOutputDir(*memProfile))
		if err != nil {
			fmt.Fprintf(os.Stderr, "testing: %s\n", err)
			os.Exit(2)
		}
		runtime.GC() // materialize all statistics
		if err = m.deps.WriteProfileTo("allocs", f, 0); err != nil {
			fmt.Fprintf(os.Stderr, "testing: can't write %s: %s\n", *memProfile, err)
			os.Exit(2)
		}
		f.Close()