1#!/bin/bash 2 3# 4# Copyright (C) 2016 The Android Open Source Project 5# 6# Permission is hereby granted, free of charge, to any person 7# obtaining a copy of this software and associated documentation 8# files (the "Software"), to deal in the Software without 9# restriction, including without limitation the rights to use, copy, 10# modify, merge, publish, distribute, sublicense, and/or sell copies 11# of the Software, and to permit persons to whom the Software is 12# furnished to do so, subject to the following conditions: 13# 14# The above copyright notice and this permission notice shall be 15# included in all copies or substantial portions of the Software. 16# 17# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 20# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 21# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 22# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 23# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 24# SOFTWARE. 25# 26 27# This shell-script checks the symbols in libavb.a and fails 28# if a reference not starting with avb_ is referenced. It's intended 29# to catch mistakes where the standard C library is inadvertently 30# used. 31 32set -e 33 34SYMBOLS_FILE=$(mktemp /tmp/libavb_symbols.XXXXXXXXXX) 35 36trap "rm -f '${SYMBOLS_FILE}'" EXIT 37 38readelf --symbols --wide "${ANDROID_HOST_OUT}/obj/STATIC_LIBRARIES/libavb_intermediates/libavb.a" | \ 39 awk '$7 == "UND" && $8 != "" {print $8}' | \ 40 grep -v ^avb_ | \ 41 sort -u > "${SYMBOLS_FILE}" 42 43# If this file is non-empty, it means that the library is using 44# symbols not starting with "avb_". 45if [ -s "${SYMBOLS_FILE}" ] ; then 46 echo "ERROR: $0: Unexpected symbols in libavb:" >&2 47 cat "${SYMBOLS_FILE}" >&2 48 exit 1 49fi 50