cpuprof.addExtra()
		cpuprof.log.close()
	}
	unlock(&cpuprof.lock)
}

// add adds the stack trace to the profile.
// It is called from signal handlers and other limited environments
// and cannot allocate memory or acquire locks that might be
// held at the time of the signal, nor can it use substantial amounts
// of stack.
//
//go:nowritebarrierrec
func (p *cpuProfile) add(tagPtr *unsafe.Pointer, stk []uintptr) {

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Emulation of the Unix signal SIGSEGV.
//
// On iOS, Go tests and apps under development are run by lldb.
// The debugger uses a task-level exception handler to intercept signals.
// Despite having a 'handle' mechanism like gdb, lldb will not allow a
// SIGSEGV to pass to the running program. For Go, this means we cannot

	SIGIO      = Signal(0x16)
	SIGIOT     = Signal(0x6)
	SIGJVM1    = Signal(0x27)
	SIGJVM2    = Signal(0x28)
	SIGKILL    = Signal(0x9)
	SIGLOST    = Signal(0x25)
	SIGLWP     = Signal(0x21)
	SIGPIPE    = Signal(0xd)
	SIGPOLL    = Signal(0x16)
	SIGPROF    = Signal(0x1d)
	SIGPWR     = Signal(0x13)
	SIGQUIT    = Signal(0x3)
	SIGSEGV    = Signal(0xb)
	SIGSTOP    = Signal(0x17)
	SIGSYS     = Signal(0xc)

	// with its controlling terminal shall cause the process group
	// to be sent a SIGTTOU signal. If the calling thread is
	// blocking SIGTTOU signals or the process is ignoring SIGTTOU
	// signals, the process shall be allowed to perform the
	// operation, and no signal is sent."
	//  -https://pubs.opengroup.org/onlinepubs/9699919799/functions/tcsetpgrp.html
	//

	Pgid       int // Child's process group ID if Setpgid.
	// Pdeathsig, if non-zero, is a signal that the kernel will send to
	// the child process when the creating thread dies. Note that the signal
	// is sent on thread termination, which may happen before process termination.
	// There are more details at https://go.dev/issue/27505.
	Pdeathsig    Signal
	Cloneflags   uintptr        // Flags for clone calls.

)

const (
	// More invented values for signals
	SIGHUP  = Signal(0x1)
	SIGINT  = Signal(0x2)
	SIGQUIT = Signal(0x3)
	SIGILL  = Signal(0x4)
	SIGTRAP = Signal(0x5)
	SIGABRT = Signal(0x6)
	SIGBUS  = Signal(0x7)
	SIGFPE  = Signal(0x8)
	SIGKILL = Signal(0x9)
	SIGSEGV = Signal(0xb)
	SIGPIPE = Signal(0xd)
	SIGALRM = Signal(0xe)
	SIGTERM = Signal(0xf)
)

var signals = [...]string{
	1:  "hangup",
	2:  "interrupt",

	"internal/goarch"
	"internal/stringslite"
	"unsafe"
)

// May run during STW, so write barriers are not allowed.
//
//go:nowritebarrierrec
func sighandler(_ureg *ureg, note *byte, gp *g) int {
	gsignal := getg()
	mp := gsignal.m

	var t sigTabT
	var docrash bool
	var sig int
	var flags int
	var level int32

	c := &sigctxt{_ureg}
	notestr := gostringnocopy(note)

		return errENOENT
	}
	return e
}

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

func (s Signal) Signal() {}

func (s Signal) String() string {
	if 0 <= s && int(s) < len(signals) {
		str := signals[s]
		if str != "" {
			return str
		}
	}
	return "signal " + itoa.Itoa(int(s))
}

	SIGTSTP   = syscall.Signal(0x14)
	SIGTTIN   = syscall.Signal(0x15)
	SIGTTOU   = syscall.Signal(0x16)
	SIGURG    = syscall.Signal(0x17)
	SIGUSR1   = syscall.Signal(0xa)
	SIGUSR2   = syscall.Signal(0xc)
	SIGVTALRM = syscall.Signal(0x1a)
	SIGWINCH  = syscall.Signal(0x1c)
	SIGXCPU   = syscall.Signal(0x18)
	SIGXFSZ   = syscall.Signal(0x19)
)

// Error table
var errorList = [...]struct {
	num  syscall.Errno

	SIGTSTP   = syscall.Signal(0x18)
	SIGTTIN   = syscall.Signal(0x1a)
	SIGTTOU   = syscall.Signal(0x1b)
	SIGURG    = syscall.Signal(0x15)
	SIGUSR1   = syscall.Signal(0x10)
	SIGUSR2   = syscall.Signal(0x11)
	SIGVTALRM = syscall.Signal(0x1c)
	SIGWINCH  = syscall.Signal(0x14)
	SIGXCPU   = syscall.Signal(0x1e)
	SIGXFSZ   = syscall.Signal(0x1f)
)

// Error table
var errorList = [...]struct {
	num  syscall.Errno