[lldb-server] Add setting to force 'g' packet use

Following up on https://reviews.llvm.org/D62221, this change introduces
the settings plugin.process.gdb-remote.use-g-packet-for-reading.  When
they are on, 'g' packets are used for reading registers.

Using 'g' packets can improve performance by reducing the number of
packets exchanged between client and server when a large number of
registers needs to be fetched.

Differential revision: https://reviews.llvm.org/D62931

1 files changed, 2 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h
index 574cd0fd70c..6539286b1a4 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.h
@@ -596,6 +596,8 @@ protected:
   Status GetQXferMemoryMapRegionInfo(lldb::addr_t addr,
                                      MemoryRegionInfo &region);
 
+  LazyBool GetThreadPacketSupported(lldb::tid_t tid, llvm::StringRef packetStr);
+
 private:
   DISALLOW_COPY_AND_ASSIGN(GDBRemoteCommunicationClient);
 };