[llvm.py] Implement interface to object files

It is now possible to load object files and scan over sections, symbols,
and relocations! Includes test code with partial coverage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152482 91177308-0d34-0410-b5e6-96231b3b80d8

bindings/python/llvm/tests/base.py

@@ -0,0 +1,29 @@
+import os.path
+import unittest
+
+POSSIBLE_TEST_BINARIES = [
+    'libreadline.so.5',
+    'libreadline.so.6',
+]
+
+POSSIBLE_TEST_BINARY_PATHS = [
+    '/lib',
+    '/usr/lib',
+    '/usr/local/lib',
+]
+
+class TestBase(unittest.TestCase):
+    def get_test_binary(self):
+        """Helper to obtain a test binary for object file testing.
+
+        FIXME Support additional, highly-likely targets or create one
+        ourselves.
+        """
+        for d in POSSIBLE_TEST_BINARY_PATHS:
+            for lib in POSSIBLE_TEST_BINARIES:
+                path = os.path.join(d, lib)
+
+                if os.path.exists(path):
+                    return path
+
+        raise Exception('No suitable test binaries available!')