}

func printiface(i iface) {
	print("(", i.tab, ",", i.data, ")")
}

// hexdumpWords prints a word-oriented hex dump of [p, end).
//
// If mark != nil, it will be called with each printed word's address
// and should return a character mark to appear just before that
// word's value. It can return 0 to indicate no mark.
func hexdumpWords(p, end uintptr, mark func(uintptr) byte) {
	printlock()
	var markbuf [1]byte

		}
		zombie := mbits.isMarked() && !alloc
		if zombie {
			print(" zombie")
		}
		print("\n")
		if zombie {
			length := s.elemsize
			if length > 1024 {
				length = 1024
			}
			hexdumpWords(addr, addr+length, nil)
		}
		mbits.advance()
		abits.advance()
	}
	throw("found pointer to free object")
}

// deductSweepCredit deducts sweep credit for allocating a span of

func scanConservative(b, n uintptr, ptrmask *uint8, gcw *gcWork, state *stackScanState) {
	if debugScanConservative {
		printlock()
		print("conservatively scanning [", hex(b), ",", hex(b+n), ")\n")
		hexdumpWords(b, b+n, func(p uintptr) byte {
			if ptrmask != nil {
				word := (p - b) / goarch.PtrSize
				bits := *addb(ptrmask, word/8)
				if (bits>>(word%8))&1 == 0 {
					return '$'
				}
			}

		lo = stk.lo
	}
	if hi > stk.hi {
		hi = stk.hi
	}

	// Print the hex dump.
	print("stack: frame={sp:", hex(frame.sp), ", fp:", hex(frame.fp), "} stack=[", hex(stk.lo), ",", hex(stk.hi), ")\n")
	hexdumpWords(lo, hi, func(p uintptr) byte {
		switch p {
		case frame.fp:
			return '>'
		case frame.sp:
			return '<'
		case bad:
			return '!'
		}
		return 0
	})
}