[docker] Add check-symbol script to the engine build tools (#187)

ci/docker/tizen/tools/check-symbol.py

@@ -0,0 +1,82 @@
+#!/usr/bin/env python
+# Copyright 2021 Samsung Electronics Co., Ltd. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import subprocess
+import sys
+
+
+class Symbol:
+    def __init__(self, addr, type, name):
+        self.addr = addr
+        self.type = type
+        self.name = name
+
+    def __str__(self):
+        return '{} {} {}'.format(self.addr, self.type, self.name)
+
+    @staticmethod
+    def parse(line):
+        return Symbol(line[:8].strip(), line[9], line[11:].strip())
+
+
+def check_symbol(sofile, allowlist):
+    if not os.access(sofile, os.R_OK):
+        raise Exception('{} is not readable'.format(sofile))
+    if not os.access(allowlist, os.R_OK):
+        raise Exception('{} is not readable'.format(allowlist))
+
+    try:
+        symbols_raw = subprocess.check_output(
+            ['nm', '-gDC', sofile]).decode('utf-8').splitlines()
+        symbols = [Symbol.parse(line) for line in symbols_raw]
+    except subprocess.CalledProcessError as e:
+        raise Exception('nm failed: {}'.format(e))
+
+    with open(allowlist, 'r') as f:
+        allowlist = [line.strip() for line in f.readlines()]
+
+    not_allowed = []
+    for symbol in symbols:
+        if symbol.addr:
+            continue
+        if symbol.name.startswith('FlutterEngine'):
+            continue
+        if symbol.name in allowlist:
+            continue
+        not_allowed.append(symbol)
+
+    if not_allowed:
+        print('Symbols not allowed ({}):'.format(sofile))
+        for symbol in not_allowed:
+            print(symbol)
+        return False
+
+    return True
+
+
+def main():
+    import optparse
+    parser = optparse.OptionParser(usage='%prog [options] [sofile ..]')
+    parser.add_option('--allowlist', dest='allowlist',
+                      help='Path to the allowlist file')
+    (options, args) = parser.parse_args()
+
+    if not options.allowlist:
+        print('--allowlist is required')
+        return 1
+    if not args:
+        print('sofile is required')
+        return 1
+
+    for sofile in args:
+        if not check_symbol(sofile, options.allowlist):
+            return 1
+
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main())