[LLDB] Fix timeout value on expect_gdbremote_sequence

[omjavaid]

Summary

D83904 seems to have changed timeout value on expect_gdbremote_sequence which was 120 previously. This seems to be causing intermittent failures on lldb-aarch64-ubuntu buildbot. This patch reverts the timeout value to its previous value to see the impact on test suite.

Example:
http://lab.llvm.org:8011/builders/lldb-aarch64-ubuntu/builds/7401/steps/test/logs/stdio

[JDevlieghere]

lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py

706

I see the problem, we're trying to process all the entries in the sequence in the timeout for a single packet. Rather than an arbitrary multiplier we should use the number of entries in the sequence. Let's define __len__ in GdbRemoteTestSequence

def __len__(self):
        return len(self.entries)

and then multiply the timeout by the length of the sequence:

self.DEFAULT_TIMEOUT * len(self.test_sequence)

[omjavaid]

Fixed as suggested by @JDevlieghere

lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py

def parse_register_info_packets(self, context):
                 for reg_info_response in reg_info_responses]
 
     def expect_gdbremote_sequence(self):
         return expect_lldb_gdbserver_replay(
             self,
             self.sock,
             self.test_sequence,
             self._pump_queues,
-            self.DEFAULT_TIMEOUT,
+            self.DEFAULT_TIMEOUT * len(self.test_sequence),
             self.logger)
 
     _KNOWN_REGINFO_KEYS = [
         "name",
         "alt-name",
         "bitsize",
         "offset",
         "encoding",

lldb/packages/Python/lldbsuite/test/tools/lldb-server/lldbgdbserverutils.py

 class GdbRemoteTestSequence(object):
 
     _LOG_LINE_REGEX = re.compile(r'^.*(read|send)\s+packet:\s+(.+)$')
 
     def __init__(self, logger):
         self.entries = []
         self.logger = logger
 
+    def __len__(self):
+        return len(self.entries)
+
     def add_log_lines(self, log_lines, remote_input_is_read):
         for line in log_lines:
             if isinstance(line, str):
                 # Handle log line import
                 # if self.logger:
                 #     self.logger.debug("processing log line: {}".format(line))
                 match = self._LOG_LINE_REGEX.match(line)
                 if match: