From 7a697b8dd7ac3c14e35ae3026d955aeae3ecc054 Mon Sep 17 00:00:00 2001
From: Stan Shebs <shebs@codesourcery.com>
Date: Wed, 6 Jan 2010 04:20:27 +0000
Subject: 	Add fast tracepoints. 	* arch-utils.h
 (default_fast_tracepoint_valid_at): Declare. 	* arch-utils.c
 (default_fast_tracepoint_valid_at): New function. 	* breakpoint.h (enum
 bptype): Add bp_fast_tracepoint. 	* breakpoint.c (tracepoint_type): New
 function. 	(ALL_TRACEPOINTS): Use it. 	(should_be_inserted): Ditto. 
 (bpstat_check_location): Ditto. 	(print_one_breakpoint_location):
 Ditto. 	(user_settable_breakpoint): Ditto. 
 (set_breakpoint_location_function): Ditto. 
 (disable_breakpoints_in_shlibs): Ditto. 	(delete_trace_command): Ditto.
 	(print_it_typical): Add bp_fast_tracepoint case. 	(bpstat_what):
 Ditto. 	(print_one_breakpoint_location): Ditto. 
 (allocate_bp_location): Ditto. 	(mention): Ditto. 
 (breakpoint_re_set_one): Ditto. 	(disable_command): Ditto. 
 (enable_command): Ditto. 	(check_fast_tracepoint_sals): New function. 
 (break_command_really): Call it. 	(ftrace_command): New function. 
 (_initialize_breakpoint): Add ftrace command. 	* gdbarch.sh
 (fast_tracepoint_valid_at): New. 	* gdbarch.h, gdbarch.c: Regenerate. 
 * i386-tdep.c (i386_fast_tracepoint_valid_at): New function. 
 (i386_gdbarch_init): Use it. 	* remote.c (struct remote_state): New field
 fast_tracepoints. 	(PACKET_FastTracepoints): New packet config type. 
 (remote_fast_tracepoint_feature): New function. 
 (remote_protocol_features): Add FastTracepoints. 
 (remote_supports_fast_tracepoints): New function. 	(_initialize_remote):
 Add FastTracepoints. 	* tracepoint.c (download_tracepoint): Add fast
 tracepoint option. 	* NEWS: Mention fast tracepoints.

	* gdb.texinfo (Create and Delete Tracepoints): Describe fast
	tracepoints.
	(Tracepoint Packets): Describe remote protocol for fast
	tracepoints.

	* gdb.trace/tracecmd.exp: Test ftrace.
---
 gdb/remote.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'gdb/remote.c')

diff --git a/gdb/remote.c b/gdb/remote.c
index 7af67e5..cba9f5b 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -298,6 +298,9 @@ struct remote_state
   /* True if the stub reports support for conditional tracepoints.  */
   int cond_tracepoints;
 
+  /* True if the stub reports support for fast tracepoints.  */
+  int fast_tracepoints;
+
   /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
      responded to that.  */
   int ctrlc_pending_p;
@@ -1066,6 +1069,7 @@ enum {
   PACKET_qXfer_siginfo_write,
   PACKET_qAttached,
   PACKET_ConditionalTracepoints,
+  PACKET_FastTracepoints,
   PACKET_bc,
   PACKET_bs,
   PACKET_MAX
@@ -3136,6 +3140,15 @@ remote_cond_tracepoint_feature (const struct protocol_feature *feature,
   rs->cond_tracepoints = (support == PACKET_ENABLE);
 }
 
+static void
+remote_fast_tracepoint_feature (const struct protocol_feature *feature,
+				enum packet_support support,
+				const char *value)
+{
+  struct remote_state *rs = get_remote_state ();
+  rs->fast_tracepoints = (support == PACKET_ENABLE);
+}
+
 static struct protocol_feature remote_protocol_features[] = {
   { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
   { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
@@ -3164,6 +3177,8 @@ static struct protocol_feature remote_protocol_features[] = {
     PACKET_qXfer_siginfo_write },
   { "ConditionalTracepoints", PACKET_DISABLE, remote_cond_tracepoint_feature,
     PACKET_ConditionalTracepoints },
+  { "FastTracepoints", PACKET_DISABLE, remote_fast_tracepoint_feature,
+    PACKET_FastTracepoints },
   { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
     PACKET_bc },
   { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
@@ -8895,6 +8910,13 @@ remote_supports_cond_tracepoints (void)
   return rs->cond_tracepoints;
 }
 
+int
+remote_supports_fast_tracepoints (void)
+{
+  struct remote_state *rs = get_remote_state ();
+  return rs->fast_tracepoints;
+}
+
 static void
 init_remote_ops (void)
 {
@@ -9371,6 +9393,8 @@ Show the maximum size of the address (in bits) in a memory packet."), NULL,
 
   add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
 			 "ConditionalTracepoints", "conditional-tracepoints", 0);
+  add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
+			 "FastTracepoints", "fast-tracepoints", 0);
 
   /* Keep the old ``set remote Z-packet ...'' working.  Each individual
      Z sub-packet has its own set and show commands, but users may
-- 
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