[GDBRemoteCommunicationClient] Increase timeout for qfProcessInfo packet.

[sivachandra]

Summary

The test in TestPlatformCommand which runs "platform process list" has
been timing out for Android when running running dosep.py with
LLDB_TEST_THREADS=8. This patch increases the packet timeout to a large
value of 1min to accommodate the long time required for a response for
the qfProcessInfo packet on Android.

[chaoren]

source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp

2699

I think it would be good to have a per-platform default timeout value, so we don't need a global change to accommodate one particularly slow platform.

[tberghammer]

source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp

2699

We already have a platform specific default packet timeout specified in GDBRemoteCommunicationServerCommon and I don't think it would be a good idea to increase that one further just because of one slow packet. As a long term solution I would prefer to rework the communication timeout handling in LLDB because a timeout almost always cause issues in a later stage when the response packet came in with a huge delay.

source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp

if (m_supports_qfProcessInfo)
                 const ArchSpec &match_arch = match_info.GetProcessInfo().GetArchitecture();
                 const llvm::Triple &triple = match_arch.GetTriple();
                 packet.PutCString("triple:");
                 packet.PutCString(triple.getTriple().c_str());
                 packet.PutChar (';');
             }
         }
         StringExtractorGDBRemote response;
+        // Increase timeout as the first qfProcessInfo packet takes a long time
+        // on Android. The value of 1min was arrived at empirically.
+        GDBRemoteCommunication::ScopedTimeout timeout (*this, 60);
         if (SendPacketAndWaitForResponse (packet.GetData(), packet.GetSize(), response, false) == PacketResult::Success)
         {
             do
             {
                 ProcessInstanceInfo process_info;
                 if (!DecodeProcessInfoResponse (response, process_info))
                     break;
                 process_infos.Append(process_info);