the number of control packets from/to GDB. See "New remote packets"
below.
+* GDB now understands the element 'tvar' in the XML traceframe info.
+ It has the id of the collected trace state variables.
+
* New remote packets
vCont;r
** GDBserver now supports target-assisted range stepping. Currently
enabled on x86/x86_64 GNU/Linux targets.
+ ** GDBserver now adds element 'tvar' in the XML in the reply to
+ 'qXfer:traceframe-info:read'. It has the id of the collected
+ trace state variables.
+
*** Changes in GDB 7.6
* Target record has been renamed to record-full.