[PATCH 04/18] Move works_in_software_mode to watchpoint

[Tom Tromey <tom@tromey.com>]

works_in_software_mode is only useful for watchpoints.  This patch
moves it from breakpoint to watchpoint, and changes it to return bool.
---
 gdb/breakpoint.c | 16 +++++-----------
 gdb/breakpoint.h | 12 ++++++------
 2 files changed, 11 insertions(+), 17 deletions(-)

diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 2521e95ce70..41e827bfca7 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -2144,7 +2144,7 @@ update_watchpoint (struct watchpoint *b, int reparse)
 		= target_can_use_hardware_watchpoint (type, i, other_type_used);
 	      if (target_resources_ok <= 0)
 		{
-		  int sw_mode = b->works_in_software_mode ();
+		  bool sw_mode = b->works_in_software_mode ();
 
 		  if (target_resources_ok == 0 && !sw_mode)
 		    error (_("Target does not support this type of "
@@ -9558,7 +9558,7 @@ watchpoint::resources_needed (const struct bp_location *bl)
 /* Implement the "works_in_software_mode" method for hardware
    watchpoints.  */
 
-int
+bool
 watchpoint::works_in_software_mode () const
 {
   /* Read and access watchpoints only work with hardware support.  */
@@ -9733,7 +9733,7 @@ struct masked_watchpoint : public watchpoint
   int remove_location (struct bp_location *,
 		       enum remove_bp_reason reason) override;
   int resources_needed (const struct bp_location *) override;
-  int works_in_software_mode () const override;
+  bool works_in_software_mode () const override;
   enum print_stop_action print_it (struct bpstat *bs) override;
   void print_one_detail (struct ui_out *) const override;
   void print_mention () override;
@@ -9771,10 +9771,10 @@ masked_watchpoint::resources_needed (const struct bp_location *bl)
 /* Implement the "works_in_software_mode" method for masked hardware
    watchpoints.  */
 
-int
+bool
 masked_watchpoint::works_in_software_mode () const
 {
-  return 0;
+  return false;
 }
 
 /* Implement the "print_it" method for masked hardware
@@ -11550,12 +11550,6 @@ breakpoint::breakpoint_hit (const struct bp_location *bl,
   internal_error_pure_virtual_called ();
 }
 
-int
-breakpoint::works_in_software_mode () const
-{
-  internal_error_pure_virtual_called ();
-}
-
 int
 breakpoint::resources_needed (const struct bp_location *bl)
 {
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index ec3a8309b51..bbacbca15fb 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -668,11 +668,6 @@ struct breakpoint
      the breakpoint or watchpoint needs one debug register.  */
   virtual int resources_needed (const struct bp_location *);
 
-  /* Tell whether we can downgrade from a hardware watchpoint to a software
-     one.  If not, the user will not be able to enable the watchpoint when
-     there are not enough hardware resources available.  */
-  virtual int works_in_software_mode () const;
-
   /* The normal print routine for this breakpoint, called when we
      hit it.  */
   virtual enum print_stop_action print_it (struct bpstat *bs);
@@ -878,7 +873,12 @@ struct watchpoint : public breakpoint
 		      const target_waitstatus &ws) override;
   void check_status (struct bpstat *bs) override;
   int resources_needed (const struct bp_location *) override;
-  int works_in_software_mode () const override;
+
+  /* Tell whether we can downgrade from a hardware watchpoint to a software
+     one.  If not, the user will not be able to enable the watchpoint when
+     there are not enough hardware resources available.  */
+  virtual bool works_in_software_mode () const;
+
   enum print_stop_action print_it (struct bpstat *bs) override;
   void print_mention () override;
   void print_recreate (struct ui_file *fp) override;
-- 
2.34.1