#!/bin/bash# Copyright 2018 the V8 project authors. All rights reserved.# Use of this source code is governed by a BSD-style license that can be# found in the LICENSE file.v8_root=$(readlink-f$(dirname$BASH_SOURCE)/../)symbols=$(grep\--only-matching\--perl-regexp'V\(_, \K([^,\)]*)'\--"$v8_root/src/heap-symbols.h")# Find symbols which appear exactly once (in heap-symbols.h)grep\--only-matching\--no-filename\--recursive\--fixed-strings"$symbols"\--"$v8_root/src""$v8_root/test/cctest"\| sort\| uniq-u\| sed-e's/.*/Heap symbol "&" seems to be unused./'echo"Kthxbye."