#!/bin/bash

# Copyright (c) 2021-2021 Huawei Device Co., Ltd. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this list of
#    conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice, this list
#    of conditions and the following disclaimer in the documentation and/or other materials
#    provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors may be used
#    to endorse or promote products derived from this software without specific prior written
#    permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Description: The script is used to calculate the memory size that the specified shared library
# will occupy when loading to the RAM.

READELF=readelf
RM=rm
SIZE=0x0
SIZE_ALL=0x0
SIZE_MAX=0
TMP_FILE=tmp.txt

if [ $# -lt 1 ]; then
    echo "Usage: ./so_parse lib.so"
    exit 1
fi

parse_line()
{
    MEM_SIZE=$(echo $1 | awk '{print $6}')
    echo ${MEM_SIZE}
}

${READELF} -l $1 | while read line; do
    HEAD_STRING=$(echo ${line} | awk '{print $1}')
    if [[ "${HEAD_STRING}" == *"LOAD"* ]]; then
        SIZE=`parse_line "${line}"`
        SIZE=`echo ${SIZE}`
        SIZE_ALL=$((SIZE_ALL+SIZE))
    fi
    echo ${SIZE_ALL} >> ${TMP_FILE}
done

NEED_SIZE=`tail -n 1 ${TMP_FILE}`
echo "${NEED_SIZE} bytes memory to reserve for $1!"
${RM} -f ${TMP_FILE}