[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, 1 deletions

diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteRegisterContext.h b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteRegisterContext.h
index 25e9b716f8c..b42c87b5991 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteRegisterContext.h
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteRegisterContext.h
@@ -41,7 +41,7 @@ class GDBRemoteRegisterContext : public RegisterContext {
 public:
   GDBRemoteRegisterContext(ThreadGDBRemote &thread, uint32_t concrete_frame_idx,
                            GDBRemoteDynamicRegisterInfo &reg_info,
-                           bool read_all_at_once);
+                           bool read_all_at_once, bool write_all_at_once);
 
   ~GDBRemoteRegisterContext() override;
 
@@ -114,6 +114,7 @@ protected:
   std::vector<bool> m_reg_valid;
   DataExtractor m_reg_data;
   bool m_read_all_at_once;
+  bool m_write_all_at_once;
 
 private:
   // Helper function for ReadRegisterBytes().