[LLDB][MIPS] Debug bare-iron targets lacking support for qC /qfThreadInfo

    SUMMARY:
    Using response.IsUnsupportedResponse instead of !response.IsNormalResponse().

    Reviewers: clayborg, labath
    Subscribers: nitesh.jain, mohit.bhakkad, sagar, bhushan and lldb-commits
    Differential Revision: http://reviews.llvm.org/D12876

llvm-svn: 247968

1 files changed, 33 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
index 95408073bf5..cad49efcaf5 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
@@ -3400,6 +3400,17 @@ GDBRemoteCommunicationClient::SetCurrentThread (uint64_t tid)
             m_curr_tid = tid;
             return true;
         }
+
+        /*
+         * Connected bare-iron target (like YAMON gdb-stub) may not have support for Hg packet.
+         * The reply from '?' packet could be as simple as 'S05'. There is no packet which can
+         * give us pid and/or tid. Assume pid=tid=1 in such cases.
+        */
+        if (response.IsUnsupportedResponse() && IsConnected())
+        {
+            m_curr_tid = 1;
+            return true;
+        }
     }
     return false;
 }
@@ -3426,6 +3437,17 @@ GDBRemoteCommunicationClient::SetCurrentThreadForRun (uint64_t tid)
             m_curr_tid_run = tid;
             return true;
         }
+
+        /*
+         * Connected bare-iron target (like YAMON gdb-stub) may not have support for Hc packet.
+         * The reply from '?' packet could be as simple as 'S05'. There is no packet which can
+         * give us pid and/or tid. Assume pid=tid=1 in such cases.
+        */
+        if (response.IsUnsupportedResponse() && IsConnected())
+        {
+            m_curr_tid_run = 1;
+            return true;
+        }
     }
     return false;
 }
@@ -3551,6 +3573,17 @@ GDBRemoteCommunicationClient::GetCurrentThreadIDs (std::vector<lldb::tid_t> &thr
                 } while (ch == ',');            // Make sure we got a comma separator
             }
         }
+
+        /*
+         * Connected bare-iron target (like YAMON gdb-stub) may not have support for
+         * qProcessInfo, qC and qfThreadInfo packets. The reply from '?' packet could
+         * be as simple as 'S05'. There is no packet which can give us pid and/or tid.
+         * Assume pid=tid=1 in such cases.
+        */
+        if (response.IsUnsupportedResponse() && thread_ids.size() == 0 && IsConnected())
+        {
+            thread_ids.push_back (1);
+        }
     }
     else
     {