diff --git a/vndk/tools/image-diff-tool/whitelist.txt b/vndk/tools/image-diff-tool/allowlist.txt
similarity index 100%
rename from vndk/tools/image-diff-tool/whitelist.txt
rename to vndk/tools/image-diff-tool/allowlist.txt
diff --git a/vndk/tools/image-diff-tool/compare_images_and_print.sh b/vndk/tools/image-diff-tool/compare_images_and_print.sh
index 23b45f7ee..8c94cd396 100755
--- a/vndk/tools/image-diff-tool/compare_images_and_print.sh
+++ b/vndk/tools/image-diff-tool/compare_images_and_print.sh
@@ -41,26 +41,26 @@ readonly CHECK_DIFF_RESULT
 . build/envsetup.sh
 lunch aosp_arm64
 build/soong/soong_ui.bash --make-mode compare_images
-COMMON_WHITELIST=development/vndk/tools/image-diff-tool/whitelist.txt
-out/host/linux-x86/bin/compare_images $1 -u -w "${COMMON_WHITELIST}"
+COMMON_ALLOWLIST=development/vndk/tools/image-diff-tool/allowlist.txt
+out/host/linux-x86/bin/compare_images $1 -u -w "${COMMON_ALLOWLIST}"
 
 if [ -v DIST_DIR ]; then
-  cp common.csv diff.csv whitelisted_diff.csv "${DIST_DIR}"
+  cp common.csv diff.csv allowlisted_diff.csv "${DIST_DIR}"
 fi
 
 echo >&2
-echo >&2 " - Different parts (that are whitelisted)"
-cat >&2 whitelisted_diff.csv
+echo >&2 " - Different parts (that are allowlisted)"
+cat >&2 allowlisted_diff.csv
 echo >&2
-echo >&2 " - Different parts (that are not whitelisted)"
+echo >&2 " - Different parts (that are not allowlisted)"
 cat >&2 diff.csv
 
 if [ "$(wc -l diff.csv | cut -d' ' -f1)" -gt "1" ]; then
   cat >&2 <<EOF
 
 [ERROR] Unexpected diffing files.
-There are diffing files that are not ignored by whitelist.
-The whitelist may need to be updated.
+There are diffing files that are not ignored by allowlist.
+The allowlist may need to be updated.
 EOF
   if [ -n "${CHECK_DIFF_RESULT}" ]; then
     exit 1
diff --git a/vndk/tools/image-diff-tool/diff.py b/vndk/tools/image-diff-tool/diff.py
index 234e92a2c..d12609f94 100644
--- a/vndk/tools/image-diff-tool/diff.py
+++ b/vndk/tools/image-diff-tool/diff.py
@@ -12,41 +12,38 @@
 # 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.
-
-import os
-import subprocess
-import sys
-from collections import defaultdict
-from pathlib import Path
-import hashlib
 import argparse
-import zipfile
+import collections
 import fnmatch
+import hashlib
+import os
+import pathlib
+import subprocess
 import tempfile
-
+import zipfile
 def silent_call(cmd):
-  return subprocess.call(cmd, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL) == 0
-
+  return subprocess.call(
+      cmd, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL) == 0
 def sha1sum(f):
-  with open(f, 'rb') as fin:
+  with open(f, "rb") as fin:
     return hashlib.sha1(fin.read()).hexdigest()
-
 def sha1sum_without_signing_key(filepath):
   apk = zipfile.ZipFile(filepath)
   l = []
   for f in sorted(apk.namelist()):
-    if f.startswith('META-INF/'):
+    if f.startswith("META-INF/"):
       continue
     l.append(hashlib.sha1(apk.read(f)).hexdigest())
     l.append(f)
   return hashlib.sha1(",".join(l).encode()).hexdigest()
-
 def strip_and_sha1sum(filepath):
-  # TODO: save striped file in tmp directory to support readonly directory.
-  tmp_filepath = filepath + '.tmp.no-build-id'
-  strip_all_and_remove_build_id = lambda: silent_call(
-      ["llvm-strip", "--strip-all", "--keep-section=.ARM.attributes",
-       "--remove-section=.note.gnu.build-id", filepath, "-o", tmp_filepath])
+  """Strip informations of elf file and calculate sha1 hash."""
+  tmp_filepath = filepath + ".tmp.no-build-id"
+  llvm_strip = [
+      "llvm-strip", "--strip-all", "--keep-section=.ARM.attributes",
+      "--remove-section=.note.gnu.build-id", filepath, "-o", tmp_filepath
+  ]
+  strip_all_and_remove_build_id = lambda: silent_call(llvm_strip)
   try:
     if strip_all_and_remove_build_id():
       return sha1sum(tmp_filepath)
@@ -55,65 +52,51 @@ def strip_and_sha1sum(filepath):
   finally:
     if os.path.exists(tmp_filepath):
       os.remove(tmp_filepath)
-
   return sha1sum(filepath)
-
-
-def make_filter_from_whitelists(whitelists, all_targets):
-  """Creates a callable filter from a list of whitelist files.
-
-  Whitelist can contain pathname patterns or ignored lines. Pathnames are case
+def make_filter_from_allowlists(allowlists, all_targets):
+  """Creates a callable filter from a list of allowlist files.
+  Allowlist can contain pathname patterns or skipped lines. Pathnames are case
   insensitive.
-
-  Whitelist can contain single-line comments. Comment lines begin with #
-
+  Allowlist can contain single-line comments. Comment lines begin with #
   For example, this ignores the file "system/build.prop":
     SYSTEM/build.prop
-
   This ignores txt files:
     *.txt
-
   This ignores files in directory "system/dontcare/"
     SYSTEM/dontcare/*
-
   This ignores lines prefixed with pat1 or pat2 in file "system/build.prop":
     SYSTEM/build.prop=pat1 pat2
-
   Args:
-    whitelists: A list of whitelist filenames.
+    allowlists: A list of allowlist filenames.
     all_targets: A list of targets to compare.
-
   Returns:
     A callable object that accepts a file pathname and returns True if the file
-    is ignored by the whitelists and False when it is not.
+    is skipped by the allowlists and False when it is not.
   """
-  ignored_patterns = set()
-  ignored_lines = defaultdict(list)
-  for whitelist in whitelists:
-    if not os.path.isfile(whitelist):
+  skipped_patterns = set()
+  skipped_lines = collections.defaultdict(list)
+  for allowlist in allowlists:
+    if not os.path.isfile(allowlist):
       continue
-    with open(whitelist, 'rb') as f:
+    with open(allowlist, "rb") as f:
       for line in f:
         pat = line.strip().decode()
-        if pat.startswith('#'):
+        if pat.startswith("#"):
           continue
-        if pat and pat[-1] == '\\':
-          pat = pat.rstrip('\\')
-        if '=' in pat:
-          filename, prefixes = pat.split('=', 1)
+        if pat and pat[-1] == "\\":
+          pat = pat.rstrip("\\")
+        if "=" in pat:
+          filename, prefixes = pat.split("=", 1)
           prefixes = prefixes.split()
           if prefixes:
-            ignored_lines[filename.lower()].extend(prefixes)
+            skipped_lines[filename.lower()].extend(prefixes)
         elif pat:
-          ignored_patterns.add(pat.lower())
-
-  def diff_with_ignored_lines(filename, prefixes):
+          skipped_patterns.add(pat.lower())
+  def diff_with_skipped_lines(filename, prefixes):
     """Compares sha1 digest of file while ignoring lines.
-
     Args:
       filename: File to compare among each target.
-      prefixes: A list of prefixes. Lines that start with prefix are ignored.
-
+      prefixes: A list of prefixes. Lines that start with prefix are skipped.
     Returns:
       True if file is identical among each target.
     """
@@ -123,7 +106,7 @@ def make_filter_from_whitelists(whitelists, all_targets):
       if not os.path.isfile(pathname):
         return False
       sha1 = hashlib.sha1()
-      with open(pathname, 'rb') as f:
+      with open(pathname, "rb") as f:
         for line in f:
           line_text = line.decode()
           if not any(line_text.startswith(prefix) for prefix in prefixes):
@@ -131,109 +114,111 @@ def make_filter_from_whitelists(whitelists, all_targets):
       file_digest_respect_ignore.append(sha1.hexdigest())
     return (len(file_digest_respect_ignore) == len(all_targets) and
             len(set(file_digest_respect_ignore)) == 1)
-
-  def whitelist_filter(filename):
+  def allowlist_filter(filename):
     norm_filename = filename.lower()
-    for pattern in ignored_patterns:
+    for pattern in skipped_patterns:
       if fnmatch.fnmatch(norm_filename, pattern):
         return True
-    if norm_filename in ignored_lines:
-      ignored_prefixes = ignored_lines[norm_filename]
-      return diff_with_ignored_lines(filename, ignored_prefixes)
+    if norm_filename in skipped_lines:
+      skipped_prefixes = skipped_lines[norm_filename]
+      return diff_with_skipped_lines(filename, skipped_prefixes)
     return False
-
-  return whitelist_filter
-
-
-def main(all_targets, search_paths, whitelists, ignore_signing_key=False, list_only=False):
+  return allowlist_filter
+def main(all_targets,
+         search_paths,
+         allowlists,
+         ignore_signing_key=False,
+         list_only=False):
   def run(path):
-    is_native_component = silent_call(["llvm-objdump", "-a", path])
-    is_apk = path.endswith('.apk')
-    if is_native_component:
+    is_executable_component = silent_call(["llvm-objdump", "-a", path])
+    is_apk = path.endswith(".apk")
+    if is_executable_component:
       return strip_and_sha1sum(path)
     elif is_apk and ignore_signing_key:
       return sha1sum_without_signing_key(path)
     else:
       return sha1sum(path)
-
   # artifact_sha1_target_map[filename][sha1] = list of targets
-  artifact_sha1_target_map = defaultdict(lambda: defaultdict(list))
+  artifact_sha1_target_map = collections.defaultdict(
+      lambda: collections.defaultdict(list))
   for target in all_targets:
     paths = []
     for search_path in search_paths:
-      for path in Path(target, search_path).glob('**/*'):
+      for path in pathlib.Path(target, search_path).glob("**/*"):
         if path.exists() and not path.is_dir():
           paths.append((str(path), str(path.relative_to(target))))
-
     target_basename = os.path.basename(os.path.normpath(target))
     for path, filename in paths:
       sha1 = 0
       if not list_only:
         sha1 = run(path)
       artifact_sha1_target_map[filename][sha1].append(target_basename)
-
   def pretty_print(sha1, filename, targets, exclude_sha1):
     if exclude_sha1:
-      return '{}, {}\n'.format(filename, ';'.join(targets))
-
-    return '{}, {}, {}\n'.format(filename, sha1[:10], ';'.join(targets))
-
+      return "{}, {}\n".format(filename, ";".join(targets))
+    return "{}, {}, {}\n".format(filename, sha1[:10], ";".join(targets))
   def is_common(sha1_target_map):
-    for sha1, targets in sha1_target_map.items():
+    for _, targets in sha1_target_map.items():
       return len(sha1_target_map) == 1 and len(targets) == len(all_targets)
     return False
-
-  whitelist_filter = make_filter_from_whitelists(whitelists, all_targets)
-
+  allowlist_filter = make_filter_from_allowlists(allowlists, all_targets)
   common = []
   diff = []
-  whitelisted_diff = []
+  allowlisted_diff = []
   for filename, sha1_target_map in artifact_sha1_target_map.items():
     if is_common(sha1_target_map):
       for sha1, targets in sha1_target_map.items():
         common.append(pretty_print(sha1, filename, targets, list_only))
     else:
-      if whitelist_filter(filename):
+      if allowlist_filter(filename):
         for sha1, targets in sha1_target_map.items():
-          whitelisted_diff.append(pretty_print(sha1, filename, targets, list_only))
+          allowlisted_diff.append(
+              pretty_print(sha1, filename, targets, list_only))
       else:
         for sha1, targets in sha1_target_map.items():
           diff.append(pretty_print(sha1, filename, targets, list_only))
-
   common = sorted(common)
   diff = sorted(diff)
-  whitelisted_diff = sorted(whitelisted_diff)
-
+  allowlisted_diff = sorted(allowlisted_diff)
   header = "filename, sha1sum, targets\n"
   if list_only:
     header = "filename, targets\n"
-
-  with open("common.csv", 'w') as fout:
+  with open("common.csv", "w") as fout:
     fout.write(header)
     fout.writelines(common)
-  with open("diff.csv", 'w') as fout:
+  with open("diff.csv", "w") as fout:
     fout.write(header)
     fout.writelines(diff)
-  with open("whitelisted_diff.csv", 'w') as fout:
+  with open("allowlisted_diff.csv", "w") as fout:
     fout.write(header)
-    fout.writelines(whitelisted_diff)
-
-def main_with_zip(extracted_paths, args):
-  for origin_path, tmp_path in zip(args.target, extracted_paths):
+    fout.writelines(allowlisted_diff)
+def main_with_zip(extracted_paths, main_args):
+  for origin_path, tmp_path in zip(main_args.target, extracted_paths):
     unzip_cmd = ["unzip", "-qd", tmp_path, os.path.join(origin_path, "*.zip")]
-    unzip_cmd.extend([os.path.join(s, "*") for s in args.search_path])
+    unzip_cmd.extend([os.path.join(s, "*") for s in main_args.search_path])
     subprocess.call(unzip_cmd)
-  main(extracted_paths, args.search_path, args.whitelist, args.ignore_signing_key, list_only=args.list_only)
-
+  main(
+      extracted_paths,
+      main_args.search_path,
+      main_args.allowlist,
+      main_args.ignore_signing_key,
+      list_only=main_args.list_only)
 if __name__ == "__main__":
-  parser = argparse.ArgumentParser(prog="compare_images", usage="compare_images -t model1 model2 [model...] -s dir1 [dir...] [-i] [-u] [-p] [-w whitelist1] [-w whitelist2]")
-  parser.add_argument("-t", "--target", nargs='+', required=True)
-  parser.add_argument("-s", "--search_path", nargs='+', required=True)
-  parser.add_argument("-i", "--ignore_signing_key", action='store_true')
-  parser.add_argument("-l", "--list_only", action='store_true', help='Compare file list only and ignore SHA-1 diff')
-  parser.add_argument("-u", "--unzip", action='store_true')
-  parser.add_argument("-p", "--preserve_extracted_files", action='store_true')
-  parser.add_argument("-w", "--whitelist", action="append", default=[])
+  parser = argparse.ArgumentParser(
+      prog="compare_images",
+      usage="compare_images -t model1 model2 [model...] -s dir1 [dir...] [-i] [-u] [-p] [-w allowlist1] [-w allowlist2]"
+  )
+  parser.add_argument("-t", "--target", nargs="+", required=True)
+  parser.add_argument("-s", "--search_path", nargs="+", required=True)
+  parser.add_argument("-i", "--ignore_signing_key", action="store_true")
+  parser.add_argument(
+      "-l",
+      "--list_only",
+      action="store_true",
+      help="Compare file list only and ignore SHA-1 diff")
+  parser.add_argument("-u", "--unzip", action="store_true")
+  parser.add_argument("-p", "--preserve_extracted_files", action="store_true")
+  parser.add_argument("-w", "--allowlist", action="append", default=[])
   args = parser.parse_args()
   if len(args.target) < 2:
     parser.error("The number of targets has to be at least two.")
@@ -247,4 +232,9 @@ if __name__ == "__main__":
           os.makedirs(p)
         main_with_zip(target_in_tmp, args)
   else:
-    main(args.target, args.search_path, args.whitelist, args.ignore_signing_key, list_only=args.list_only)
+    main(
+        args.target,
+        args.search_path,
+        args.allowlist,
+        args.ignore_signing_key,
+        list_only=args.list_only)