< gscan;
gscan < stackpool;
gscan < stackLarge;
# Generally, hchan must be acquired before gscan. But in one case,
# where we suspend a G and then shrink its stack, syncadjustsudogs
# can acquire hchan locks while holding gscan. To allow this case,
# we use hchanLeaf instead of hchan.
gscan < hchanLeaf;

# Write barrier
defer,
  gscan,
  mspanSpecial,
  pollCache,

		if stk.lo <= p && p < stk.hi && p > sghi {
			sghi = p
		}
	}
	return sghi
}

// syncadjustsudogs adjusts gp's sudogs and copies the part of gp's
// stack they refer to while synchronizing with concurrent channel
// operations. It returns the number of bytes of stack copied.
func syncadjustsudogs(gp *g, used uintptr, adjinfo *adjustinfo) uintptr {
	if gp.waiting == nil {
		return 0
	}