Upload tsv earlier in remote_start_remote

In extended-remote, when GDB connects the target, but target is not
running, the TSVs are not uploaded.  When GDB attaches to a process,
the TSVs are not uploaded either.  However, GDBserver has some
builtin or predefined TSV to upload, such as $trace_timestamp.  This
bug causes $trace_timestamp is never uploaded.

gdb/

2013-06-25  Yao Qi  <yao@codesourcery.com>

        * remote.c (remote_start_remote): Move code to upload tsv
        earlier.

gdb/testsuite/

2013-06-25  Yao Qi  <yao@codesourcery.com>

	* boards/native-extended-gdbserver.exp: Set board_info
	'gdb,predefined_tsv'.
	* boards/native-gdbserver.exp: Likewise.
	* boards/native-stdio-gdbserver.exp: Likewise.
	* gdb.server/ext-attach.exp: Load trace-support.exp.  Check
	uploaded TSVs if target supports tracing.
	* gdb.trace/tsv.exp: Check uploaded TSVs if target supports
	tracing and target has predefined tsv.

gdb/doc/

2013-06-25  Yao Qi  <yao@codesourcery.com>

	* gdbint.texinfo (Testsuite): Document 'gdb,predefined_tsv'.

gdb/ChangeLog

@@ -1,3 +1,8 @@
+2013-06-25  Yao Qi  <yao@codesourcery.com>
+
+	* remote.c (remote_start_remote): Move code to upload tsv
+	earlier.
+
 2013-06-25  Yao Qi  <yao@codesourcery.com>
 	    Hui Zhu  <hui@codesourcery.com>
 	    Pedro Alves  <palves@redhat.com>

gdb/doc/ChangeLog

@@ -1,3 +1,7 @@
+2013-06-25  Yao Qi  <yao@codesourcery.com>
+
+	* gdbint.texinfo (Testsuite): Document 'gdb,predefined_tsv'.
+
 2013-06-24  Tom Tromey  <tromey@redhat.com>
 
 	* Makefile.in (POD2MAN1, POD2MAN5): Use version.subst.

gdb/doc/gdbint.texinfo

@@ -7983,6 +7983,9 @@ The board does not support type @code{long long}.
 @c NEED DOCUMENT.
 @item use_gdb_stub
 The tests are running with gdb stub.
+@item gdb,predefined_tsv
+The predefined trace state variables the board has.
+
 @end table
 
 @node Hints

gdb/remote.c

@@ -3452,6 +3452,17 @@ remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
 	error (_("Remote refused setting all-stop mode with: %s"), rs->buf);
     }
 
+  /* Upload TSVs regardless of whether the target is running or not.  The
+     remote stub, such as GDBserver, may have some predefined or builtin
+     TSVs, even if the target is not running.  */
+  if (remote_get_trace_status (current_trace_status ()) != -1)
+    {
+      struct uploaded_tsv *uploaded_tsvs = NULL;
+
+      remote_upload_trace_state_variables (&uploaded_tsvs);
+      merge_uploaded_trace_state_variables (&uploaded_tsvs);
+    }
+
   /* Check whether the target is running now.  */
   putpkt ("?");
   getpkt (&rs->buf, &rs->buf_size, 0);
@@ -3591,18 +3602,10 @@ remote_start_remote (int from_tty, struct target_ops *target, int extended_p)
   if (remote_get_trace_status (current_trace_status ()) != -1)
     {
       struct uploaded_tp *uploaded_tps = NULL;
-      struct uploaded_tsv *uploaded_tsvs = NULL;
 
       if (current_trace_status ()->running)
 	printf_filtered (_("Trace is already running on the target.\n"));
 
-      /* Get trace state variables first, they may be checked when
-	 parsing uploaded commands.  */
-
-      remote_upload_trace_state_variables (&uploaded_tsvs);
-
-      merge_uploaded_trace_state_variables (&uploaded_tsvs);
-
       remote_upload_tracepoints (&uploaded_tps);
 
       merge_uploaded_tracepoints (&uploaded_tps);

gdb/testsuite/ChangeLog

@@ -1,3 +1,14 @@
+2013-06-25  Yao Qi  <yao@codesourcery.com>
+
+	* boards/native-extended-gdbserver.exp: Set board_info
+	'gdb,predefined_tsv'.
+	* boards/native-gdbserver.exp: Likewise.
+	* boards/native-stdio-gdbserver.exp: Likewise.
+	* gdb.server/ext-attach.exp: Load trace-support.exp.  Check
+	uploaded TSVs if target supports tracing.
+	* gdb.trace/tsv.exp: Check uploaded TSVs if target supports
+	tracing and target has predefined tsv.
+
 2013-06-25  Yao Qi  <yao@codesourcery.com>
 	    Hui Zhu  <hui@codesourcery.com>
 	    Pedro Alves  <palves@redhat.com>

gdb/testsuite/boards/native-extended-gdbserver.exp

@@ -148,3 +148,6 @@ proc ${board}_file { dest op args } {
     }
     return [eval [list standard_file $dest $op] $args]
 }
+
+# The predefined TSVs in GDBserver.
+set_board_info gdb,predefined_tsv "\\\$trace_timestamp"

gdb/testsuite/boards/native-gdbserver.exp

@@ -90,3 +90,6 @@ proc ${board}_file { dest op args } {
     }
     return [eval [list standard_file $dest $op] $args]
 }
+
+# The predefined TSVs in GDBserver.
+set_board_info gdb,predefined_tsv "\\\$trace_timestamp"

gdb/testsuite/boards/native-stdio-gdbserver.exp

@@ -152,3 +152,6 @@ proc ${board}_file { dest op args } {
     }
     return [eval [list standard_file $dest $op] $args]
 }
+
+# The predefined TSVs in GDBserver.
+set_board_info gdb,predefined_tsv "\\\$trace_timestamp"

gdb/testsuite/gdb.server/ext-attach.exp

@@ -18,6 +18,7 @@
 # Test attaching to already-running programs using extended-remote.
 
 load_lib gdbserver-support.exp
+load_lib trace-support.exp
 
 standard_testfile
 
@@ -56,6 +57,15 @@ if { [istarget "*-*-cygwin*"] } {
 gdb_test "attach $testpid" \
     "Attaching to program: .*, process $testpid.*(in|at).*" \
     "attach to remote program 1"
+
+if { [gdb_target_supports_trace] } then {
+    # Test predefined TSVs are uploaded.
+    gdb_test_sequence "info tvariables" "check uploaded tsv" {
+	"\[\r\n\]+Name\[\t \]+Initial\[\t \]+Current"
+	"\[\r\n\]+\\\$trace_timestamp 0"
+    }
+}
+
 gdb_test "backtrace" ".*main.*" "backtrace 1"
 
 gdb_test "detach" "Detaching from program.*process.*"

gdb/testsuite/gdb.trace/tsv.exp

@@ -188,3 +188,25 @@ gdb_test_multiple "target ctf ${tracefile}.ctf" "" {
 	check_tsv "ctf"
     }
 }
+
+# Restart.
+clean_restart ${binfile}
+
+if ![runto_main] then {
+    fail "Can't run to main"
+    return
+}
+
+# If there are predefined TSVs, test these predefined TSVs are correctly
+# uploaded.
+if [target_info exists gdb,predefined_tsv] {
+    set tsv [target_info gdb,predefined_tsv]
+
+    # Test predefined TSVs are uploaded.
+    gdb_test "info tvariables" ".*${tsv}.*" "predefined tsvs are uploaded"
+} else {
+    # Otherwise (the predefined TSVs are not defined in the board file),
+    # test there is no TSVs in GDB.
+    gdb_test "info tvariables" "No trace state variables\." \
+	"no predefined tsvs"
+}