printf("var errorList = [...]struct {\n");
	printf("\tnum  syscall.Errno\n");
	printf("\tname string\n");
	printf("\tdesc string\n");
	printf("} {\n");
	qsort(errors, nelem(errors), sizeof errors[0], tuplecmp);
	for(i=0; i<nelem(errors); i++) {
		e = errors[i].num;
		if(i > 0 && errors[i-1].num == e)
			continue;
		strncpy(buf, strerror(e), sizeof(buf) - 1);
		buf[sizeof(buf) - 1] = '\0';

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

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

#undef nil
#define nil ((void*)0)
#define nelem(x) (sizeof(x)/sizeof((x)[0]))

typedef uint32_t uint32;
typedef uint64_t uint64;
typedef uintptr_t uintptr;

/*
 * The beginning of the per-goroutine structure,
 * as defined in ../pkg/runtime/runtime.h.

	// then object n is free;
	// otherwise, object n is allocated. Bits starting at nelem are
	// undefined and should never be referenced.
	//
	// Object n starts at address n*elemsize + (start << pageShift).
	freeindex uint16
	// TODO: Look up nelems from sizeclass and remove this field if it
	// helps performance.
	nelems uint16 // number of object in the span.
	// freeIndexForScan is like freeindex, except that freeindex is

		s.Fatalf("expected pointer type: %v", n.Type())
	}
	elem, rtypeExpr := n.Type().Elem(), n.ElemRType
	if count != nil {
		if !elem.IsArray() {
			s.Fatalf("expected array type: %v", elem)
		}
		elem, rtypeExpr = elem.Elem(), n.ElemElemRType
	}
	size := elem.Size()
	// Casting from larger type to smaller one is ok, so for smallest type, do nothing.
	if elem.Alignment() == 1 && (size == 0 || size == 1 || count == nil) {

	//	q/s/u
	//	q/v
	//	w
	//
	// is actually sorted as:
	//
	//	p       # dir=.    elem=p
	//	q/      # dir=.    elem=q
	//	w/      # dir=.    elem=w
	//	q/r     # dir=q    elem=r
	//	q/s/    # dir=q    elem=s
	//	q/v     # dir=q    elem=v
	//	q/s/t   # dir=q/s  elem=t
	//	q/s/u   # dir=q/s  elem=u
	//
	// This order brings directory contents together in contiguous sections

		for fname, f := range fsys {
			if strings.HasPrefix(fname, prefix) {
				felem := fname[len(prefix):]
				i := strings.Index(felem, "/")
				if i < 0 {
					list = append(list, mapFileInfo{felem, f})
				} else {
					need[fname[len(prefix):len(prefix)+i]] = true
				}
			}
		}
		// If the directory name is not in the map,
		// and there are no children of the name in the map,
		// then the directory is treated as not existing.

		// more detail.
		print("runtime: nelems=", s.nelems, " nalloc=", nalloc, " previous allocCount=", s.allocCount, " nfreed=", nfreed, "\n")
		throw("sweep increased allocation count")
	}

	s.allocCount = nalloc
	s.freeindex = 0 // reset allocation index to start of span.
	s.freeIndexForScan = 0
	if traceEnabled() {
		getg().m.p.ptr().trace.reclaimed += uintptr(nfreed) * s.elemsize
	}

		newline   = "\n"
		tab       = "\t"
	)

	readModuleLine := func(elem []string) (Module, error) {
		if len(elem) != 2 && len(elem) != 3 {
			return Module{}, fmt.Errorf("expected 2 or 3 columns; got %d", len(elem))
		}
		version := elem[1]
		sum := ""
		if len(elem) == 3 {
			sum = elem[2]
		}
		return Module{
			Path:    elem[0],
			Version: version,
			Sum:     sum,
		}, nil
	}

	case reflect.Slice, reflect.Array:
		for i := 0; i < reflectValue.Len(); i++ {
			elem := reflectValue.Index(i)
			elemKey := elem.Interface()
			if elem.Kind() != reflect.Ptr && elem.CanAddr() {
				elemKey = elem.Addr().Interface()
			}

			if _, ok := loaded[elemKey]; ok {
				continue
			}
			loaded[elemKey] = true

		}
		return tp
	}

	// Move up elem and addr.
	// Offsets within an element are always at a ptrBits*goarch.PtrSize boundary.
	if n >= tp.typ.Size_ {
		// elem needs to be moved to the element containing
		// tp.addr + n.
		oldelem := tp.elem
		tp.elem += (tp.addr - tp.elem + n) / tp.typ.Size_ * tp.typ.Size_
		tp.addr = tp.elem + alignDown(n-(tp.elem-oldelem), ptrBits*goarch.PtrSize)
	} else {