} else if len(pcBuf) > 0 && pcBuf[0] == logicalStackSentinel {
		// pcBuf contains logical rather than inlined frames, skip has already been
		// applied, just return it without the sentinel value in pcBuf[0].
		return copy(dst, pcBuf[1:])
	}

	var (
		n          int
		lastFuncID = abi.FuncIDNormal
		skip       = pcBuf[0]
		// skipOrAdd skips or appends retPC to newPCBuf and returns true if more
		// pcs can be added.

	return persistentalloc(n, 0, &memstats.other_sys)
}

// FPCallers works like Callers and uses frame pointer unwinding to populate
// pcBuf with the return addresses of the physical frames on the stack.
func FPCallers(pcBuf []uintptr) int {
	return fpTracebackPCs(unsafe.Pointer(getfp()), pcBuf)
}

const FramePointerEnabled = framepointer_enabled

var (
	IsPinned      = isPinned

    @Override
    public void write(int c) {}

    @Override
    public void write(char[] cbuf) {
      checkNotNull(cbuf);
    }

    @Override
    public void write(char[] cbuf, int off, int len) {
      checkPositionIndexes(off, off + len, cbuf.length);
    }

    @Override
    public void write(String str) {
      checkNotNull(str);
    }

    @Override

    @Override
    public void write(int c) {}

    @Override
    public void write(char[] cbuf) {
      checkNotNull(cbuf);
    }

    @Override
    public void write(char[] cbuf, int off, int len) {
      checkPositionIndexes(off, off + len, cbuf.length);
    }

    @Override
    public void write(String str) {
      checkNotNull(str);
    }

    @Override

	freeBuf *stackWorkBuf // keep around one free buffer for allocation hysteresis

	// cbuf contains conservative pointers to stack objects. If
	// all pointers to a stack object are obtained via
	// conservative scanning, then the stack object may be dead
	// and may contain dead pointers, so it must be scanned
	// defensively.
	cbuf *stackWorkBuf

	// list of stack objects
	// Objects are in increasing address order.

    private val charset: Charset,
  ) : Reader() {
    private var closed: Boolean = false
    private var delegate: Reader? = null

    @Throws(IOException::class)
    override fun read(
      cbuf: CharArray,
      off: Int,
      len: Int,
    ): Int {
      if (closed) throw IOException("Stream closed")

      val finalDelegate =
        delegate ?: InputStreamReader(

	pname, err := syscall.UTF16PtrFromString(name)
	if err != nil {
		return 0, 0, err
	}
	var pbuf *byte
	if len(buf) > 0 {
		pbuf = (*byte)(unsafe.Pointer(&buf[0]))
	}
	l := uint32(len(buf))
	err = syscall.RegQueryValueEx(syscall.Handle(k), pname, nil, &valtype, pbuf, &l)
	if err != nil {
		return int(l), valtype, err
	}
	return int(l), valtype, nil
}

   * characters that it could read in read(char[], int, int).
   */
  private static Reader newNonBufferFillingReader(Reader reader) {
    return new FilterReader(reader) {
      @Override
      public int read(char[] cbuf, int off, int len) throws IOException {
        // if a buffer isn't being cleared correctly, this method will eventually start being called
        // with a len of 0 forever
        if (len <= 0) {

   * characters that it could read in read(char[], int, int).
   */
  private static Reader newNonBufferFillingReader(Reader reader) {
    return new FilterReader(reader) {
      @Override
      public int read(char[] cbuf, int off, int len) throws IOException {
        // if a buffer isn't being cleared correctly, this method will eventually start being called
        // with a len of 0 forever
        if (len <= 0) {

func callbackasm1()

var profiletimer uintptr

func profilem(mp *m, thread uintptr) {
	// Align Context to 16 bytes.
	var c *context
	var cbuf [unsafe.Sizeof(*c) + 15]byte
	c = (*context)(unsafe.Pointer((uintptr(unsafe.Pointer(&cbuf[15]))) &^ 15))

	c.contextflags = _CONTEXT_CONTROL
	stdcall2(_GetThreadContext, thread, uintptr(unsafe.Pointer(c)))

	gp := gFromSP(mp, c.sp())