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- #!/bin/bash -e
- # Copyright 2020 Google Inc. All rights reserved.
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- # Generates NDK API txt file used by Mainline modules. NDK APIs would have value
- # "UND" in Ndx column and have suffix "@LIB_NAME" in Name column.
- # For example, current line llvm-readelf output is:
- # 1: 00000000 0 FUNC GLOBAL DEFAULT UND dlopen@LIBC
- # After the parse function below "dlopen" would be write to the output file.
- printHelp() {
- echo "**************************** Usage Instructions ****************************"
- echo "This script is used to generate the Mainline modules used-by NDK symbols."
- echo ""
- echo "To run this script use: ./ndk_usedby_module.sh \$BINARY_IMAGE_DIRECTORY \$BINARY_LLVM_PATH \$OUTPUT_FILE_PATH"
- echo "For example: If all the module image files that you would like to run is under directory '/myModule' and output write to /myModule.txt then the command would be:"
- echo "./ndk_usedby_module.sh /myModule \$BINARY_LLVM_PATH /myModule.txt"
- }
- parseReadelfOutput() {
- local readelfOutput=$1; shift
- local ndkApisOutput=$1; shift
- while IFS= read -r line
- do
- if [[ $line = *FUNC*GLOBAL*UND*@* ]] ;
- then
- echo "$line" | sed -r 's/.*UND (.*@.*)/\1/g' >> "${ndkApisOutput}"
- fi
- done < "${readelfOutput}"
- echo "" >> "${ndkApisOutput}"
- }
- unzipJarAndApk() {
- local dir="$1"; shift
- local tmpUnzippedDir="$1"; shift
- mkdir -p "${tmpUnzippedDir}"
- find "$dir" -name "*.jar" -exec unzip -o {} -d "${tmpUnzippedDir}" \;
- find "$dir" -name "*.apk" -exec unzip -o {} -d "${tmpUnzippedDir}" \;
- find "${tmpUnzippedDir}" -name "*.MF" -exec rm {} \;
- }
- lookForExecFile() {
- local dir="$1"; shift
- local readelf="$1"; shift
- local tmpOutput="$1"; shift
- find -L "$dir" -type f -name "*.so" -exec "${readelf}" --dyn-symbols {} >> "${tmpOutput}" \;
- find -L "$dir" -type f -perm /111 ! -name "*.so" -exec "${readelf}" --dyn-symbols {} >> "${tmpOutput}" \;
- }
- if [[ "$1" == "help" ]]
- then
- printHelp
- elif [[ "$#" -ne 3 ]]
- then
- echo "Wrong argument length. Expecting 3 argument representing image file directory, llvm-readelf tool path, output path."
- else
- imageDir="$1"; shift
- readelf="$1"; shift
- outputFile="$1"; shift
- tmpReadelfOutput=$(mktemp /tmp/temporary-file.XXXXXXXX)
- tmpUnzippedDir=$(mktemp -d /tmp/temporary-dir.XXXXXXXX)
- trap 'rm -rf -- "${tmpReadelfOutput}" "${tmpUnzippedDir}"' EXIT
- # If there are any jars or apks, unzip them to surface native files.
- unzipJarAndApk "${imageDir}" "${tmpUnzippedDir}"
- # Analyze the unzipped files.
- lookForExecFile "${tmpUnzippedDir}" "${readelf}" "${tmpReadelfOutput}"
- # Analyze the apex image staging dir itself.
- lookForExecFile "${imageDir}" "${readelf}" "${tmpReadelfOutput}"
- [[ -e "${outputFile}" ]] && rm "${outputFile}"
- parseReadelfOutput "${tmpReadelfOutput}" "${outputFile}"
- fi
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