1 files changed, 71 insertions, 0 deletions
diff --git a/abi/abitool.py b/abi/abitool.py
new file mode 100644
index 0000000..9491c3f
--- /dev/null
+++ b/abi/abitool.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2019 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 subprocess
+import logging
+
+log = logging.getLogger(__name__)
+
+class AbiTool(object):
+    """ Base class for different kinds of abi analysis tools"""
+    def dump_kernel_abi(self, linux_tree, dump_path):
+        raise NotImplementedError()
+
+    def diff_abi(self, old_dump, new_dump, diff_report):
+        raise NotImplementedError()
+
+    def name(self):
+        raise NotImplementedError()
+
+class Libabigail(AbiTool):
+    """" Concrete AbiTool implementation for libabigail """
+    def dump_kernel_abi(self, linux_tree, dump_path):
+        dump_abi_cmd = ['abidw',
+                        '--linux-tree',
+                        linux_tree,
+                        '--out-file',
+                        dump_path]
+        subprocess.check_call(dump_abi_cmd)
+
+    def diff_abi(self, old_dump, new_dump, diff_report):
+        log.info('libabigail diffing: {} and {} at {}'.format(old_dump,
+                                                                new_dump,
+                                                                diff_report))
+        diff_abi_cmd = ['abidiff',
+                        '--impacted-interfaces',
+                        '--leaf-changes-only',
+                        '--dump-diff-tree',
+                        old_dump,
+                        new_dump]
+
+        with open(diff_report, 'w') as out:
+            try:
+                subprocess.check_call(diff_abi_cmd, stdout=out, stderr=out)
+            except subprocess.CalledProcessError as e:
+                if e.returncode in (1, 2):  # abigail error, user error
+                    raise
+                return True  # actual abi change
+
+        return False  # no abi change
+
+def get_abi_tool(abi_tool):
+    if abi_tool == 'libabigail':
+        log.info('using libabigail for abi analysis')
+        return Libabigail()
+
+    raise ValueError("not a valid abi_tool: %s" % abi_tool)
+