tests: Add test for vmcoreinfo special object

Signed-off-by: Stephen Brennan <[email protected]>

tests/linux_kernel/test_special_objects.py

@@ -0,0 +1,43 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
+import os
+
+import drgn
+from tests.linux_kernel import LinuxKernelTestCase
+
+
+class TestUts(LinuxKernelTestCase):
+    def test_uts_release(self):
+        self.assertEqual(
+            self.prog["UTS_RELEASE"].string_().decode(), os.uname().release
+        )
+
+    def test_uts_release_no_debug_info(self):
+        prog = drgn.Program()
+        prog.set_kernel()
+        self.assertEqual(prog["UTS_RELEASE"].string_().decode(), os.uname().release)
+
+
+class TestVmcoreinfo(LinuxKernelTestCase):
+    def test_vmcoreinfo(self):
+        vmcoreinfo_data = dict(
+            line.split("=", 1)
+            for line in self.prog["VMCOREINFO"].string_().decode().strip().split("\n")
+        )
+        self.assertEqual(
+            int(vmcoreinfo_data["SYMBOL(init_uts_ns)"], 16),
+            self.prog.symbol("init_uts_ns").address,
+        )
+
+    def test_vmcoreinfo_no_debug_info(self):
+        prog = drgn.Program()
+        prog.set_kernel()
+        vmcoreinfo_data = dict(
+            line.split("=", 1)
+            for line in prog["VMCOREINFO"].string_().decode().strip().split("\n")
+        )
+        self.assertEqual(
+            vmcoreinfo_data["OSRELEASE"],
+            os.uname().release,
+        )