[patch 2/8] New remote feature InstallInTrace

[Yao Qi <yao at codesourcery dot com>]

This patch is about adding a new remote feature `InstallInTrace' which
indicates remote stubs supports downloading/installing tracepoint
locations while tracing is running.

It will be used in patch 4/8.

-- 
Yao (éå)

        * remote.c (struct remote_state): <install_in_trace> new field.
        (PACKET_InstallInTrace): New enum value.
        (remote_install_in_trace_feature): Support InstallInTrace.
	(remote_supports_install_in_trace): Likewise.
	(remote_protocol_features): Likewise.
	(_initialize_remote): Likewise.
---
 gdb/remote.c |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/gdb/remote.c b/gdb/remote.c
index 1c43f39..c34d47b 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -323,6 +323,10 @@ struct remote_state
   /* True if the stub reports support for static tracepoints.  */
   int static_tracepoints;
 
+  /* True if the stub reports support for installing tracepoint while
+     tracing.  */
+  int install_in_trace;
+
   /* True if the stub can continue running a trace while GDB is
      disconnected.  */
   int disconnected_tracing;
@@ -1261,6 +1265,7 @@ enum {
   PACKET_ConditionalTracepoints,
   PACKET_FastTracepoints,
   PACKET_StaticTracepoints,
+  PACKET_InstallInTrace,
   PACKET_bc,
   PACKET_bs,
   PACKET_TracepointSource,
@@ -3696,6 +3701,16 @@ remote_static_tracepoint_feature (const struct protocol_feature *feature,
 }
 
 static void
+remote_install_in_trace_feature (const struct protocol_feature *feature,
+				 enum packet_support support,
+				 const char *value)
+{
+  struct remote_state *rs = get_remote_state ();
+
+  rs->install_in_trace = (support == PACKET_ENABLE);
+}
+
+static void
 remote_disconnected_tracing_feature (const struct protocol_feature *feature,
 				     enum packet_support support,
 				     const char *value)
@@ -3761,6 +3776,8 @@ static struct protocol_feature remote_protocol_features[] = {
     PACKET_FastTracepoints },
   { "StaticTracepoints", PACKET_DISABLE, remote_static_tracepoint_feature,
     PACKET_StaticTracepoints },
+  {"InstallInTrace", PACKET_DISABLE, remote_install_in_trace_feature,
+   PACKET_InstallInTrace},
   { "DisconnectedTracing", PACKET_DISABLE, remote_disconnected_tracing_feature,
     -1 },
   { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
@@ -9748,6 +9765,14 @@ remote_supports_static_tracepoints (void)
 }
 
 static int
+remote_supports_install_in_trace (void)
+{
+  struct remote_state *rs = get_remote_state ();
+
+  return rs->install_in_trace;
+}
+
+static int
 remote_supports_enable_disable_tracepoint (void)
 {
   struct remote_state *rs = get_remote_state ();
@@ -11000,6 +11025,9 @@ Show the maximum size of the address (in bits) in a memory packet."), NULL,
   add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
 			 "StaticTracepoints", "static-tracepoints", 0);
 
+  add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
+			 "InstallInTrace", "install-in-trace", 0);
+
   add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
                          "qXfer:statictrace:read", "read-sdata-object", 0);
 
-- 
1.7.0.4