# Find duplicate shared libraries by md5 checksum and possible duplicates by size. # Results will be available in the out directory of the build. # Usage: # ./dupcheck.sh <out_dir> <image>
# Check arguments if [ "$#" -ne 2 ]; then echo"Usage: ./dupcheck.sh <out_dir> <image>"
exit 1 fi
# Check host and toolchain version
CHECK_HOST=$(uname) if [ "${CHECK_HOST}" == "Linux" ]; then
ARCH="linux-x86" else
ARCH="darwin-x86" fi
BINUTILS_PATH="./prebuilts/clang/host/${ARCH}/llvm-binutils-stable"
# Remove any old files if they exist. if [ -f "${MD5_DUPLICATES}" ]; then rm"${MD5_DUPLICATES}" fi
if [ -f "${SIZE_DUPLICATES}" ]; then rm"${SIZE_DUPLICATES}" fi
# Find all .so files and calculate their md5.
find ./"${OUT_DIR}"/${IMG}/ -name "lib*.so" -type f -print0 | xargs -0 md5sum | sed -e "s# .*/# #" | sort | uniq -c | sort -g | sed "/^.*1 /d" | sed "s/^. *[0-9] //" > "${TMP_MD5}" 2>&1
if [ -s "${TMP_MD5}" ]; then while read -r list; do
checksum=$(echo"${list}" | cut -f1 -d ' ')
filename=$(echo"${list}" | cut -f2 -d ' ') # For each md5, list the file paths that match.
{ echo"MD5: ${checksum}"; \
find ./"${OUT_DIR}"/${IMG}/ -name "${filename}" -type f -print0 | xargs -0 md5sum | grep "${checksum}" | sed 's/^.* //'; \ echo""; \
} >> "${MD5_DUPLICATES}" done <"${TMP_MD5}" else echo"No duplicate files by md5 found." >> "${MD5_DUPLICATES}" fi
# Cleanup rm"${TMP_MD5}"
# Find possible duplicate .so files by size.
find ./"${OUT_DIR}"/${IMG}/ -name "*.so" -type f -print0 | xargs -0 stat --format="%s %n"2>/dev/null | sed -e "s# .*/# #" | sort | uniq -c | sort -g | sed "/^.*1 /d" > "${TMP_SIZE}" 2>&1 if [ -s "${TMP_SIZE}" ]; then while read -r list; do
size=$(echo"${list}" | cut -f2 -d ' ')
filename=$(echo"${list}" | cut -f3 -d ' ') # Check if the files are not in the md5sum list and do nothing if that is the case.
find ./"${OUT_DIR}"/${IMG}/ -name "${filename}" -type f -print0 | xargs -0 stat --format="%s %n"2>/dev/null | grep "${size}" | sed "s/^.* //" | sort > "${TMP_CHECK}"2>&1 while read -r filepath; do
found=$(grep -F "${filepath}""${MD5_DUPLICATES}") if [ -z "${found}" ]; then echo"${filepath}" >> "${TMP_SIZE_REAL}" fi done<"${TMP_CHECK}" # For every duplication found, diff the .note and .text sections. if [ -s "${TMP_SIZE_REAL}" ]; then
{ echo"File: ${filename}, Size: ${size}"; \ cat"${TMP_SIZE_REAL}"; \ echo""; \
} >> "${SIZE_DUPLICATES}"
count=$(wc -l "${TMP_SIZE_REAL}" | cut -f1 -d ' ') # Limitation: this only works for file pairs. If more than two possible duplications are found, the user need to check manually # all the possible combinations using the llvm-readelf and llvm-objdump commands below. if [ "${count}" = 2 ]; then
file1=$(head -n 1"${TMP_SIZE_REAL}")
file2=$(tail -n 1"${TMP_SIZE_REAL}") # Check .note section
${BINUTILS_PATH}/llvm-readelf --wide --notes "${file1}" > "${TMP_FILE1}"2>&1
${BINUTILS_PATH}/llvm-readelf --wide --notes "${file2}" > "${TMP_FILE2}"2>&1
{
diff -u "${TMP_FILE1}""${TMP_FILE2}" | sed "1d;2d;3d"; \ echo"";
} >> "${SIZE_DUPLICATES}" # Check .text section
${BINUTILS_PATH}/llvm-objdump --line-numbers --disassemble --demangle --reloc --no-show-raw-insn --section=.text "${file1}" | sed "1d;2d"> "${TMP_FILE1}"2>&1
${BINUTILS_PATH}/llvm-objdump --line-numbers --disassemble --demangle --reloc --no-show-raw-insn --section=.text "${file2}" | sed "1d;2d"> "${TMP_FILE2}"2>&1
{
diff -u "${TMP_FILE1}""${TMP_FILE2}" | sed "1d;2d;3d"; \ echo"";
} >> "${SIZE_DUPLICATES}" # Cleanup rm"${TMP_FILE1}""${TMP_FILE2}" else echo"*Note: more than one duplicate. Manually verify all possible combinations." >> "${SIZE_DUPLICATES}" fi rm"${TMP_SIZE_REAL}" echo"" >> "${SIZE_DUPLICATES}" fi done <"${TMP_SIZE}" # Cleanup rm"${TMP_SIZE}""${TMP_CHECK}" else echo"No duplicate files by size found." >> "${SIZE_DUPLICATES}" fi
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-06-28)
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