[LLDB][MIPS] Support standard GDB remote stop reply packet for watchpoint

    SUMMARY:
    The patch supports TAAwatch:addr packet. The patch also sets m_watchpoints_trigger_after_instruction 
    to eLazyBoolNo when qHostInfo or qWatchpointSupportInfo is not supported by the target.
    
    Reviewers: jingham, clayborg
    Subscribers: nitesh.jain, mohit.bhakkad, sagar, bhushan and lldb-commits
    Differential Revision: http://reviews.llvm.org/D11747

llvm-svn: 244865

1 files changed, 16 insertions, 1 deletions

diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
index 4a9e285d2c2..d4d653d3533 100644
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -2484,6 +2484,21 @@ ProcessGDBRemote::SetThreadStopInfo (StringExtractor& stop_packet)
                         }
                     }
                 }
+                else if (key.compare("watch") == 0 || key.compare("rwatch") == 0 || key.compare("awatch") == 0)
+                {
+                    // Support standard GDB remote stop reply packet 'TAAwatch:addr'
+                    lldb::addr_t wp_addr = StringConvert::ToUInt64 (value.c_str(), LLDB_INVALID_ADDRESS, 16);
+                    WatchpointSP wp_sp = GetTarget().GetWatchpointList().FindByAddress(wp_addr);
+                    uint32_t wp_index = LLDB_INVALID_INDEX32;
+
+                    if (wp_sp)
+                        wp_index = wp_sp->GetHardwareIndex();
+
+                    reason = "watchpoint";
+                    StreamString ostr;
+                    ostr.Printf("%" PRIu64 " %" PRIu32, wp_addr, wp_index);
+                    description = ostr.GetString().c_str();
+                }
                 else if (key.size() == 2 && ::isxdigit(key[0]) && ::isxdigit(key[1]))
                 {
                     uint32_t reg = StringConvert::ToUInt32 (key.c_str(), UINT32_MAX, 16);
@@ -3085,7 +3100,7 @@ ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num)
 Error
 ProcessGDBRemote::GetWatchpointSupportInfo (uint32_t &num, bool& after)
 {
-    Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after));
+    Error error (m_gdb_comm.GetWatchpointSupportInfo (num, after, GetTarget().GetArchitecture()));
     return error;
 }