log  *profBuf // profile events written here

	// extra holds extra stacks accumulated in addNonGo
	// corresponding to profiling signals arriving on
	// non-Go-created threads. Those stacks are written
	// to log the next time a normal Go thread gets the
	// signal handler.
	// Assuming the stacks are 2 words each (we don't get
	// a full traceback from those threads), plus one word

	return e == EINTR || e == EMFILE || e.Timeout()
}

func (e Errno) Timeout() bool {
	return e == EAGAIN || e == ETIMEDOUT
}

// A Signal is a number describing a process signal.
// It implements the [os.Signal] interface.
type Signal uint8

const (
	SIGNONE Signal = iota
	SIGHUP
	SIGINT
	SIGQUIT
	SIGILL
	SIGTRAP
	SIGABRT
	SIGBUS
	SIGFPE
	SIGKILL
	SIGUSR1
	SIGSEGV
	SIGUSR2

}

// Instance of work tickets processed using a rate-limiting loop
type baseInstance interface {
	// Push a task.
	Push(task Task)
	// Run the loop until a signal on the channel
	Run(<-chan struct{})
	// Closed returns a chan that will be signaled when the Instance has stopped processing tasks.
	Closed() <-chan struct{}
}

type Instance interface {
	baseInstance
	// HasSynced returns true once the queue has synced.

	MOVD	R1, R4

	// Store g on gsignal's stack, so if we receive a signal
	// during VDSO code we can find the g.
	// If we don't have a signal stack, we won't receive signal,
	// so don't bother saving g.
	// When using cgo, we already saved g on TLS, also don't save
	// g here.
	// Also don't save g if we are already on the signal stack.
	// We won't get a nested signal.
	MOVBZ	runtime·iscgo(SB), R22
	CMP	R22, $0
	BNE	nosaveg

		return -1
	}
	return int(w >> shift)
}

func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != 0 }

func (w WaitStatus) Signal() syscall.Signal {
	sig := syscall.Signal(w & mask)
	if sig == stopped || sig == 0 {
		return -1
	}
	return sig
}

func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 }

}

//export goCallbackPprof
func goCallbackPprof() {
	// No-op. We want to stress the cgocall and cgocallback internals,
	// landing as many pprof signals there as possible.
}

func CgoPprofCallback() {
	// Issue 50936 was a crash in the SIGPROF handler when the signal
	// arrived during the exitsyscall following a cgocall(back) in dropg or
	// execute, when updating mp.curg.
	//

func parseGracePeriods(statements map[string]string) (map[evictionapi.Signal]time.Duration, error) {
	if len(statements) == 0 {
		return nil, nil
	}
	results := map[evictionapi.Signal]time.Duration{}
	for signal, val := range statements {
		signal := evictionapi.Signal(signal)
		if !validSignal(signal) {
			return nil, fmt.Errorf(unsupportedEvictionSignal, signal)
		}
		gracePeriod, err := time.ParseDuration(val)

			}
			t := &T{
				common: common{
					signal: make(chan any),
				},
				name:          testName,
				startParallel: startParallel,
			}
			t.self = t
			if *chatty {
				fmt.Printf("=== RUN %s\n", t.name)
			}
			go tRunner(t, &tests[i])
			out := (<-t.signal).(*T)
			if out == nil { // Parallel run.
				go func() {
					collector <- <-t.signal
				}()
				numParallel++
				continue

		t.Logf("%s", out)
	}
	if err != nil {
		if err := err.(*exec.ExitError); err != nil && err.Sys().(syscall.WaitStatus).Signaled() {
			if !bytes.Contains(out, []byte("+++ killed by")) {
				// strace itself occasionally crashes.
				// Here, it exited with a signal, but
				// the strace log didn't report any
				// signal from the child process.
				t.Log(err)
				testenv.SkipFlaky(t, 63734)
			}
		}
		t.Fatal(err)
	}

	SIGGRANT    = Signal(0x3c)
	SIGHUP      = Signal(0x1)
	SIGILL      = Signal(0x4)
	SIGINT      = Signal(0x2)
	SIGIO       = Signal(0x17)
	SIGIOINT    = Signal(0x10)
	SIGIOT      = Signal(0x6)
	SIGKAP      = Signal(0x3c)
	SIGKILL     = Signal(0x9)
	SIGLOST     = Signal(0x6)
	SIGMAX      = Signal(0xff)
	SIGMAX32    = Signal(0x3f)
	SIGMAX64    = Signal(0xff)
	SIGMIGRATE  = Signal(0x23)