gdbserver: turn target op 'supports_tracepoints' into a method

gdbserver/ChangeLog:
2020-02-20  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

	Turn process_stratum_target's supports_tracepoints op into a
	method of process_target.

	* target.h (struct process_stratum_target): Remove the target op.
	(class process_target): Add the target op.
	(target_supports_tracepoints): Update the macro.
	* target.cc (process_target::supports_tracepoints): Define.

	Update the derived classes and callers below.

	* linux-low.cc (linux_target_ops): Update.
	(linux_supports_tracepoints): Turn into ...
	(linux_process_target::supports_tracepoints): ... this.
	* linux-low.h (class linux_process_target): Update.
	* lynx-low.cc (lynx_target_ops): Update.
	* nto-low.cc (nto_target_ops): Update.
	* win32-low.cc (win32_target_ops): Update.

gdbserver/ChangeLog

@@ -1,3 +1,23 @@
+2020-02-20  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>
+
+	Turn process_stratum_target's supports_tracepoints op into a
+	method of process_target.
+
+	* target.h (struct process_stratum_target): Remove the target op.
+	(class process_target): Add the target op.
+	(target_supports_tracepoints): Update the macro.
+	* target.cc (process_target::supports_tracepoints): Define.
+
+	Update the derived classes and callers below.
+
+	* linux-low.cc (linux_target_ops): Update.
+	(linux_supports_tracepoints): Turn into ...
+	(linux_process_target::supports_tracepoints): ... this.
+	* linux-low.h (class linux_process_target): Update.
+	* lynx-low.cc (lynx_target_ops): Update.
+	* nto-low.cc (nto_target_ops): Update.
+	* win32-low.cc (win32_target_ops): Update.
+
 2020-02-20  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>
 
 	Turn process_stratum_target's process_qsupported op into a method

gdbserver/linux-low.cc

@@ -6546,11 +6546,11 @@ linux_get_ipa_tdesc_idx (void)
   return (*the_low_target.get_ipa_tdesc_idx) ();
 }
 
-static int
-linux_supports_tracepoints (void)
+bool
+linux_process_target::supports_tracepoints ()
 {
   if (*the_low_target.supports_tracepoints == NULL)
-    return 0;
+    return false;
 
   return (*the_low_target.supports_tracepoints) ();
 }
@@ -7449,7 +7449,6 @@ linux_get_hwcap2 (int wordsize)
 static linux_process_target the_linux_target;
 
 static process_stratum_target linux_target_ops = {
-  linux_supports_tracepoints,
   linux_read_pc,
   linux_write_pc,
   linux_thread_stopped,

gdbserver/linux-low.h

@@ -386,6 +386,8 @@ public:
 #endif
 
   void process_qsupported (char **features, int count) override;
+
+  bool supports_tracepoints () override;
 };
 
 #define get_thread_lwp(thr) ((struct lwp_info *) (thread_target_data (thr)))

gdbserver/lynx-low.cc

@@ -735,7 +735,6 @@ static lynx_process_target the_lynx_target;
 /* The LynxOS target_ops vector.  */
 
 static process_stratum_target lynx_target_ops = {
-  NULL,  /* supports_tracepoints */
   NULL,  /* read_pc */
   NULL,  /* write_pc */
   NULL,  /* thread_stopped */

gdbserver/nto-low.cc

@@ -947,7 +947,6 @@ nto_sw_breakpoint_from_kind (int kind, int *size)
 static nto_process_target the_nto_target;
 
 static process_stratum_target nto_target_ops = {
-  NULL, /* supports_tracepoints */
   NULL, /* read_pc */
   NULL, /* write_pc */
   NULL, /* thread_stopped */

gdbserver/target.cc

@@ -608,3 +608,9 @@ process_target::process_qsupported (char **features, int count)
 {
   /* Nop.  */
 }
+
+bool
+process_target::supports_tracepoints ()
+{
+  return false;
+}

gdbserver/target.h

@@ -70,10 +70,6 @@ class process_target;
    shared code.  */
 struct process_stratum_target
 {
-  /* Return 1 if the target supports tracepoints, 0 (or leave the
-     callback NULL) otherwise.  */
-  int (*supports_tracepoints) (void);
-
   /* Read PC from REGCACHE.  */
   CORE_ADDR (*read_pc) (struct regcache *regcache);
 
@@ -489,6 +485,9 @@ public:
   /* Target specific qSupported support.  FEATURES is an array of
      features with COUNT elements.  */
   virtual void process_qsupported (char **features, int count);
+
+  /* Return true if the target supports tracepoints, false otherwise.  */
+  virtual bool supports_tracepoints ();
 };
 
 extern process_stratum_target *the_target;
@@ -551,8 +550,7 @@ int kill_inferior (process_info *proc);
    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 
 #define target_supports_tracepoints()			\
-  (the_target->supports_tracepoints			\
-   ? (*the_target->supports_tracepoints) () : 0)
+  the_target->pt->supports_tracepoints ()
 
 #define target_supports_fast_tracepoints()		\
   (the_target->install_fast_tracepoint_jump_pad != NULL)

gdbserver/win32-low.cc

@@ -1852,7 +1852,6 @@ win32_sw_breakpoint_from_kind (int kind, int *size)
 static win32_process_target the_win32_target;
 
 static process_stratum_target win32_target_ops = {
-  NULL, /* supports_tracepoints */
   NULL, /* read_pc */
   NULL, /* write_pc */
   NULL, /* thread_stopped */