[lldb/test] Avoid globbing in log file handling code

The glob expression for a test called "test" could match a log file for
a the test "test_foo". Instead of globbing, maintain an explicit list of
log files relevant to the current test.

lldb/packages/Python/lldbsuite/test/lldbtest.py

@@ -576,6 +576,7 @@ class Base(unittest2.TestCase):
         # confirm that the file is writeable
         host_log_path = "{}-host.log".format(log_basename)
         open(host_log_path, 'w').close()
+        self.log_files.append(host_log_path)
 
         log_enable = "log enable -Tpn -f {} ".format(host_log_path)
         for channel_with_categories in lldbtest_config.channels:
@@ -602,6 +603,7 @@ class Base(unittest2.TestCase):
         if lldb.remote_platform is None:
             server_log_path = "{}-server.log".format(log_basename)
             open(server_log_path, 'w').close()
+            self.log_files.append(server_log_path)
             os.environ["LLDB_DEBUGSERVER_LOG_FILE"] = server_log_path
 
             # Communicate channels to lldb-server
@@ -623,12 +625,13 @@ class Base(unittest2.TestCase):
         # Retrieve the server log (if any) from the remote system. It is assumed the server log
         # is writing to the "server.log" file in the current test directory. This can be
         # achieved by setting LLDB_DEBUGSERVER_LOG_FILE="server.log" when starting remote
-        # platform. If the remote logging is not enabled, then just let the Get() command silently
-        # fail.
+        # platform.
         if lldb.remote_platform:
-            lldb.remote_platform.Get(
-                lldb.SBFileSpec("server.log"), lldb.SBFileSpec(
-                    self.getLogBasenameForCurrentTest() + "-server.log"))
+            server_log_path = self.getLogBasenameForCurrentTest() + "-server.log"
+            if lldb.remote_platform.Get(
+                lldb.SBFileSpec("server.log"),
+                lldb.SBFileSpec(server_log_path)).Success():
+                self.log_files.append(server_log_path)
 
     def setPlatformWorkingDir(self):
         if not lldb.remote_platform or not configuration.lldb_platform_working_dir:
@@ -800,11 +803,12 @@ class Base(unittest2.TestCase):
         # List of forked process PIDs
         self.forkedProcessPids = []
 
-        # Create a string buffer to record the session info, to be dumped into a
-        # test case specific file if test failure is encountered.
-        self.log_basename = self.getLogBasenameForCurrentTest()
+        # List of log files produced by the current test.
+        self.log_files = []
+
+        session_file = self.getLogBasenameForCurrentTest()+".log"
+        self.log_files.append(session_file)
 
-        session_file = "{}.log".format(self.log_basename)
         # Python 3 doesn't support unbuffered I/O in text mode.  Open buffered.
         self.session = encoded_file.open(session_file, "utf-8", mode="w")
 
@@ -1218,14 +1222,13 @@ class Base(unittest2.TestCase):
         del self.session
 
         # process the log files
-        log_files_for_this_test = glob.glob(self.log_basename + "*")
-
         if prefix != 'Success' or lldbtest_config.log_success:
             # keep all log files, rename them to include prefix
+            src_log_basename = self.getLogBasenameForCurrentTest(None)
             dst_log_basename = self.getLogBasenameForCurrentTest(prefix)
-            for src in log_files_for_this_test:
+            for src in self.log_files:
                 if os.path.isfile(src):
-                    dst = src.replace(self.log_basename, dst_log_basename)
+                    dst = src.replace(src_log_basename, dst_log_basename)
                     if os.name == "nt" and os.path.isfile(dst):
                         # On Windows, renaming a -> b will throw an exception if
                         # b exists.  On non-Windows platforms it silently
@@ -1239,8 +1242,9 @@ class Base(unittest2.TestCase):
                     os.rename(src, dst)
         else:
             # success!  (and we don't want log files) delete log files
-            for log_file in log_files_for_this_test:
-                remove_file(log_file)
+            for log_file in self.log_files:
+                if os.path.isfile(log_file):
+                    remove_file(log_file)
 
     # ====================================================
     # Config. methods supported through a plugin interface