if err != nil {
			t.Fatal(err)
		}
	}
}

// generateUsageTestFiles create nFolders * nFiles files of size bytes each.
func generateUsageTestFiles(t *testing.T, base, bucket string, nFolders, nFiles, size int) {
	pl := make([]byte, size)
	for i := 0; i < nFolders; i++ {
		name := filepath.Join(base, bucket, fmt.Sprint(i), "0.txt")

	{"kern.mbstat", []_C_int{1, 59}},
	{"kern.msgbuf", []_C_int{1, 48}},
	{"kern.msgbufsize", []_C_int{1, 38}},
	{"kern.nchstats", []_C_int{1, 41}},
	{"kern.netlivelocks", []_C_int{1, 76}},
	{"kern.nfiles", []_C_int{1, 56}},
	{"kern.ngroups", []_C_int{1, 18}},
	{"kern.nosuidcoredump", []_C_int{1, 32}},
	{"kern.nprocs", []_C_int{1, 47}},
	{"kern.nthreads", []_C_int{1, 26}},
	{"kern.numvnodes", []_C_int{1, 58}},

	{"kern.mbstat", []_C_int{1, 59}},
	{"kern.msgbuf", []_C_int{1, 48}},
	{"kern.msgbufsize", []_C_int{1, 38}},
	{"kern.nchstats", []_C_int{1, 41}},
	{"kern.netlivelocks", []_C_int{1, 76}},
	{"kern.nfiles", []_C_int{1, 56}},
	{"kern.ngroups", []_C_int{1, 18}},
	{"kern.nosuidcoredump", []_C_int{1, 32}},
	{"kern.nprocs", []_C_int{1, 47}},
	{"kern.nthreads", []_C_int{1, 26}},
	{"kern.numvnodes", []_C_int{1, 58}},

	// runtime.
	//
	// On most platforms this is the number of reachable functions.
	nfunc int32

	// The number of filenames in runtime.filetab.
	nfiles uint32
}

// addGeneratedSym adds a generator symbol to pclntab, returning the new Sym.
// It is the caller's responsibility to save the symbol in state.

	{"kern.mbstat", []_C_int{1, 59}},
	{"kern.msgbuf", []_C_int{1, 48}},
	{"kern.msgbufsize", []_C_int{1, 38}},
	{"kern.nchstats", []_C_int{1, 41}},
	{"kern.netlivelocks", []_C_int{1, 76}},
	{"kern.nfiles", []_C_int{1, 56}},
	{"kern.ngroups", []_C_int{1, 18}},
	{"kern.nosuidcoredump", []_C_int{1, 32}},
	{"kern.nprocs", []_C_int{1, 47}},
	{"kern.nthreads", []_C_int{1, 26}},
	{"kern.numvnodes", []_C_int{1, 58}},

	{"kern.mbstat", []_C_int{1, 59}},
	{"kern.msgbuf", []_C_int{1, 48}},
	{"kern.msgbufsize", []_C_int{1, 38}},
	{"kern.nchstats", []_C_int{1, 41}},
	{"kern.netlivelocks", []_C_int{1, 76}},
	{"kern.nfiles", []_C_int{1, 56}},
	{"kern.ngroups", []_C_int{1, 18}},
	{"kern.nosuidcoredump", []_C_int{1, 32}},
	{"kern.nprocs", []_C_int{1, 47}},
	{"kern.nselcoll", []_C_int{1, 43}},
	{"kern.nthreads", []_C_int{1, 26}},

	{"kern.mbstat", []_C_int{1, 59}},
	{"kern.msgbuf", []_C_int{1, 48}},
	{"kern.msgbufsize", []_C_int{1, 38}},
	{"kern.nchstats", []_C_int{1, 41}},
	{"kern.netlivelocks", []_C_int{1, 76}},
	{"kern.nfiles", []_C_int{1, 56}},
	{"kern.ngroups", []_C_int{1, 18}},
	{"kern.nosuidcoredump", []_C_int{1, 32}},
	{"kern.nprocs", []_C_int{1, 47}},
	{"kern.nthreads", []_C_int{1, 26}},
	{"kern.numvnodes", []_C_int{1, 58}},

	{"kern.mbstat", []_C_int{1, 59}},
	{"kern.msgbuf", []_C_int{1, 48}},
	{"kern.msgbufsize", []_C_int{1, 38}},
	{"kern.nchstats", []_C_int{1, 41}},
	{"kern.netlivelocks", []_C_int{1, 76}},
	{"kern.nfiles", []_C_int{1, 56}},
	{"kern.ngroups", []_C_int{1, 18}},
	{"kern.nosuidcoredump", []_C_int{1, 32}},
	{"kern.nprocs", []_C_int{1, 47}},
	{"kern.nthreads", []_C_int{1, 26}},
	{"kern.numvnodes", []_C_int{1, 58}},

// following:
//
// -- MetaSymbolHeader header----------
//  | size: size of this blob in bytes
//  | packagepath: <path to p>
//  | modulepath: <modpath for p>
//  | nfiles: 1
//  | nfunctions: 2
//  --func offsets table------
//  <offset to func 0>
//  <offset to func 1>
//  --string table (contains all files and functions)------
//  | <uleb128 len> 4
//  | <data> "p.go"

	{"kern.mbstat", []_C_int{1, 59}},
	{"kern.msgbuf", []_C_int{1, 48}},
	{"kern.msgbufsize", []_C_int{1, 38}},
	{"kern.nchstats", []_C_int{1, 41}},
	{"kern.netlivelocks", []_C_int{1, 76}},
	{"kern.nfiles", []_C_int{1, 56}},
	{"kern.ngroups", []_C_int{1, 18}},
	{"kern.nosuidcoredump", []_C_int{1, 32}},
	{"kern.nprocs", []_C_int{1, 47}},
	{"kern.nthreads", []_C_int{1, 26}},
	{"kern.numvnodes", []_C_int{1, 58}},