2009-12-28 Stan Shebs <stan@codesourcery.com>

[deliverable/binutils-gdb.git] / gdb / NEWS

diff --git a/gdb/NEWS b/gdb/NEWS
index 8c0fd92b9fff5c597f49b35cac4852a7a5b918c7..b680d9be6b73c02fd09981a355f0a55592ee40cc 100644 (file)
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -24,6 +24,19 @@ Renesas RX                   rx
   lists inferiors that are not running yet or that have exited
   already.  See also "New commands" and "New options" below.
 
   lists inferiors that are not running yet or that have exited
   already.  See also "New commands" and "New options" below.
 

+* Trace state variables
+
+  GDB tracepoints now include support for trace state variables, which
+  are variables managed by the target agent during a tracing
+  experiment.  They are useful for tracepoints that trigger each
+  other, so for instance one tracepoint can count hits in a variable,
+  and then a second tracepoint has a condition that is true when the
+  count reaches a particular value.  Trace state variables share the
+  $-syntax of GDB convenience variables, and can appear in both
+  tracepoint actions and condition expressions.  Use the "tvariable"
+  command to create, and "info tvariables" to view; see "Trace State
+  Variables" in the manual for more detail.
+  

 * Changed commands
 
 disassemble
 * Changed commands
 
 disassemble


@@ -75,6 +88,15 @@ set remotebreak [on | off]
 show remotebreak
 Deprecated.  Use "set/show remote interrupt-sequence" instead.
 
 show remotebreak
 Deprecated.  Use "set/show remote interrupt-sequence" instead.
 

+tvariable $NAME [ = EXP ]
+  Create or modify a trace state variable.
+
+info tvariables
+  List trace state variables and their values.
+
+delete tvariable $NAME ...
+  Delete one or more trace state variables.
+

 * New options
 
 set follow-exec-mode new|same
 * New options
 
 set follow-exec-mode new|same


@@ -83,6 +105,14 @@ show follow-exec-mode
   creates a new one.  This is useful to be able to restart the old
   executable after the inferior having done an exec call.
 
   creates a new one.  This is useful to be able to restart the old
   executable after the inferior having done an exec call.
 

+* New remote packets
+
+QTDV
+   Define a trace state variable.
+
+qTV
+   Get the current value of a trace state variable.
+

 * Bug fixes
 
 Process record now works correctly with hardware watchpoints.
 * Bug fixes
 
 Process record now works correctly with hardware watchpoints.