Support disconnected tracing.

	* infcmd.c (detach_command): Ask whether to stop tracing.
	* cli/cli-cmds.c (quit_command): Ditto.
	* breakpoint.h (struct breakpoint): New field number_on_target.
	* breakpoint.c (create_tracepoint_from_upload): New function.
	(get_tracepoint_by_number_on_target): New function.
	* remote.c (struct remote): New field disconnected_tracing.
	(remote_disconnected_tracing_feature): New function.
	(remote_protocol_features): Add DisconnectedTracing.
	(struct uploaded_tp): New struct.
	(uploaded_tps): New global.
	(get_uploaded_tp): New function.
	(find_matching_tracepoint): New function.
	(remote_get_tracing_state): New function.
	(remote_start_remote): Call it.
	* tracepoint.c (disconnected_tracing): New global.
	(trace_start_command): Initialize number_on_target.
	(stop_tracing): New function, split out from...
	(trace_stop_command): Call stop_tracing.
	(get_trace_status): New function, split out from...
	(trace_status_command): Call get_trace_status, add info on
	disconnection behavior.
	(disconnect_or_stop_tracing): New function.
	(finish_tfind_command): Translate from number on target.
	(trace_find_tracepoint_command): Translate to number on target.
	(send_disconnected_tracing_value): New function.
	(set_disconnected_tracing): New function.
	(_initialize_tracepoint): Add disconnected-tracing variable.
	* NEWS: Mention disconnected tracing.

	* gdb.texinfo (Starting and Stopping Trace Experiments): Document
	disconnected tracing.
	(Tracepoint Packets): Document new protocol.

1 files changed, 37 insertions, 0 deletions

diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 813080a..0dc8474 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -9847,6 +9847,27 @@ ftrace_command (char *arg, int from_tty)
   set_tracepoint_count (breakpoint_count);
 }
 
+extern void create_tracepoint_from_upload (int num, enum bptype type,
+					   ULONGEST addr);
+
+void
+create_tracepoint_from_upload (int num, enum bptype type, ULONGEST addr)
+{
+  char buf[100];
+  struct breakpoint *tp;
+
+  sprintf (buf, "*0x%s", paddress (get_current_arch (), addr));
+  if (type == bp_fast_tracepoint)
+    ftrace_command (buf, 0);
+  else
+    trace_command (buf, 0);
+
+  /* Record that this tracepoint is numbered differently on host and
+     target.  */
+  tp = get_tracepoint (tracepoint_count);
+  tp->number_on_target = num;
+}
+
 /* Print information on tracepoint number TPNUM_EXP, or all if
    omitted.  */
 
@@ -9997,6 +10018,22 @@ get_tracepoint (int num)
   return NULL;
 }
 
+/* Find the tracepoint with the given target-side number (which may be
+   different from the tracepoint number after disconnecting and
+   reconnecting).  */
+
+struct breakpoint *
+get_tracepoint_by_number_on_target (int num)
+{
+  struct breakpoint *t;
+
+  ALL_TRACEPOINTS (t)
+    if (t->number_on_target == num)
+      return t;
+
+  return NULL;
+}
+
 /* Utility: parse a tracepoint number and look it up in the list.
    If MULTI_P is true, there might be a range of tracepoints in ARG.
    if OPTIONAL_P is true, then if the argument is missing, the most