Embed swig version into lldb.py in a different way

Summary:
Instead of doing string chopping on the resulting python file, get swig
to output the version for us. The two things which make slightly
non-trivial are:
- in order to get swig to expand SWIG_VERSION for us, we cannot use
  %pythoncode directly, but we have to go through an intermediate macro.
- SWIG_VERSION is a hex number, but it's components are supposed to be
  interpreted decimally, so there is a bit of integer magic needed to
  get the right number to come out.

I've tested that this approach works both with the latest (3.0.12) and
oldest (1.3.40) supported swig.

Reviewers: zturner, jingham, serge-sans-paille

Subscribers: jdoerfert, lldb-commits

Differential Revision: https://reviews.llvm.org/D58172

llvm-svn: 354104

1 files changed, 28 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/python_api/lldbutil/TestSwigVersion.py b/lldb/packages/Python/lldbsuite/test/python_api/lldbutil/TestSwigVersion.py
new file mode 100644
index 00000000000..58e47d9a79f
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/python_api/lldbutil/TestSwigVersion.py
@@ -0,0 +1,28 @@
+"""
+Test that we embed the swig version into the lldb module
+"""
+
+from __future__ import print_function
+
+"""
+import os
+import time
+import re
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test import lldbutil
+"""
+from lldbsuite.test.lldbtest import *
+
+class SwigVersionTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+    NO_DEBUG_INFO_TESTCASE = True
+
+    def test(self):
+        self.assertTrue(getattr(lldb, "swig_version"))
+        self.assertIsInstance(lldb.swig_version, tuple)
+        self.assertEqual(len(lldb.swig_version), 3)
+        self.assertGreaterEqual(lldb.swig_version[0], 1)
+        for v in lldb.swig_version:
+            self.assertGreaterEqual(v, 0)