Add ndk_missing_symbols.py.
ndk_missing_symbols.py pulls libc.so and libm.so off a running device
or emulator and shows the list of symbols that are in the current
bionic that aren't available on the target.
Change-Id: Ia92c315a6a0ce2e5c33db0b62c8fab41c08a4c31
diff --git a/libc/tools/symbols.py b/libc/tools/symbols.py
new file mode 100644
index 0000000..43454e4
--- /dev/null
+++ b/libc/tools/symbols.py
@@ -0,0 +1,74 @@
+#
+# Copyright (C) 2015 The Android Open Source Project
+#
+# 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.
+#
+import glob
+import os
+import re
+import subprocess
+
+
+def GetFromTxt(txt_file):
+ symbols = set()
+ f = open(txt_file, 'r')
+ for line in f.read().splitlines():
+ symbols.add(line)
+ f.close()
+ return symbols
+
+
+def GetFromSo(so_file):
+ # pylint: disable=line-too-long
+ # Example readelf output:
+ # 264: 0001623c 4 FUNC GLOBAL DEFAULT 8 cabsf
+ # 266: 00016244 4 FUNC GLOBAL DEFAULT 8 dremf
+ # 267: 00019018 4 OBJECT GLOBAL DEFAULT 11 __fe_dfl_env
+ # 268: 00000000 0 FUNC GLOBAL DEFAULT UND __aeabi_dcmplt
+
+ r = re.compile(
+ r' +\d+: [0-9a-f]+ +\d+ (I?FUNC|OBJECT) +\S+ +\S+ +\d+ (\S+)')
+
+ symbols = set()
+
+ output = subprocess.check_output(['readelf', '--dyn-syms', '-W', so_file])
+ for line in output.split('\n'):
+ if ' HIDDEN ' in line or ' UND ' in line:
+ continue
+ m = r.match(line)
+ if m:
+ symbol = m.group(2)
+ symbol = re.sub('@.*', '', symbol)
+ symbols.add(symbol)
+
+ return symbols
+
+
+def GetFromAndroidSo(files):
+ out_dir = os.environ['ANDROID_PRODUCT_OUT']
+ lib_dir = os.path.join(out_dir, 'system/lib64')
+ if not os.path.isdir(lib_dir):
+ lib_dir = os.path.join(out_dir, 'system/lib')
+
+ results = set()
+ for f in files:
+ results |= GetFromSo(os.path.join(lib_dir, f))
+ return results
+
+
+def GetFromSystemSo(files):
+ lib_dir = '/lib/x86_64-linux-gnu'
+ results = set()
+ for f in files:
+ results |= GetFromSo(glob.glob(os.path.join(lib_dir, f))[-1])
+ return results