Stabilize TestGdbRemoteLibrariesSvr4Support

on some systems this test fails because the two methods it uses to
cross-reference the data don't match in the case of the vdso module. The
"read from /proc/%pid/maps" method returns "[vdso]", while the method
which reads it from the linker rendezvous structures returns
"linux-vdso.so.1". Neither of the two names match any actual file.

This restricts the test to only consider the libraries that we ourselves
have added to the test, minimizing the impact of system dependencies
that we cannot control.

llvm-svn: 363772

Author: labath

lldb/packages/Python/lldbsuite/test/tools/lldb-server/libraries-svr4/TestGdbRemoteLibrariesSvr4Support.py

@@ -20,6 +20,9 @@ def setup_test(self):
         self.prep_debug_monitor_and_inferior(inferior_env=env)
         self.continue_process_and_wait_for_stop()
 
+    def get_expected_libs(self):
+        return ["libsvr4lib_a.so", 'libsvr4lib_b".so']
+
     def has_libraries_svr4_support(self):
         self.add_qSupported_packets()
         context = self.expect_gdbremote_sequence()
@@ -80,7 +83,8 @@ def libraries_svr4_has_correct_load_addr(self):
         xml_root = self.get_libraries_svr4_xml()
         for child in xml_root:
             name = child.attrib.get("name")
-            if not name:
+            base_name = os.path.basename(name)
+            if os.path.basename(name) not in self.get_expected_libs():
                 continue
             load_addr = int(child.attrib.get("l_addr"), 16)
             self.reset_test_sequence()
@@ -98,8 +102,7 @@ def libraries_svr4_libs_present(self):
         for child in xml_root:
             name = child.attrib.get("name")
             libraries_svr4_names.append(os.path.realpath(name))
-        expected_libs = ["libsvr4lib_a.so", 'libsvr4lib_b".so']
-        for lib in expected_libs:
+        for lib in self.get_expected_libs():
             self.assertIn(self.getBuildDir() + "/" + lib, libraries_svr4_names)
 
     @llgs_test