Rename base_breakpoint -> code_breakpoint

Even after the previous patches reworking the inheritance of several
breakpoint types, the present breakpoint hierarchy looks a bit
surprising, as we have "breakpoint" as the superclass, and then
"base_breakpoint" inherits from "breakpoint".  Like so, simplified:

   breakpoint
       base_breakpoint
          ordinary_breakpoint
	  internal_breakpoint
	  momentary_breakpoint
	  ada_catchpoint
	  exception_catchpoint
       tracepoint
       watchpoint
       catchpoint
	  exec_catchpoint
	  ...

The surprising part to me is having "base_breakpoint" being a subclass
of "breakpoint".  I'm just refering to naming here -- I mean, you'd
expect that it would be the top level baseclass that would be called
"base".

Just flipping the names of breakpoint and base_breakpoint around
wouldn't be super great for us, IMO, given we think of every type of
*point as a breakpoint at the user visible level.  E.g., "info
breakpoints" shows watchpoints, tracepoints, etc.  So it makes to call
the top level class breakpoint.

Instead, I propose renaming base_breakpoint to code_breakpoint.  The
previous patches made sure that all code breakpoints inherit from
base_breakpoint, so it's fitting.  Also, "code breakpoint" contrasts
nicely with a watchpoint also being typically known as a "data
breakpoint".

After this commit, the resulting hierarchy looks like:

   breakpoint
       code_breakpoint
          ordinary_breakpoint
	  internal_breakpoint
	  momentary_breakpoint
	  ada_catchpoint
	  exception_catchpoint
       tracepoint
       watchpoint
       catchpoint
	  exec_catchpoint
	  ...

... which makes a lot more sense to me.

I've left this patch as last in the series in case people want to
bikeshed on the naming.

"code" has a nice property that it's exactly as many letters as
"base", so this patch didn't require any reindentation.  :-)

Change-Id: Id8dc06683a69fad80d88e674f65e826d6a4e3f66

gdb/ada-lang.c

@@ -12104,7 +12104,7 @@ static std::string ada_exception_catchpoint_cond_string
 
 /* An instance of this type is used to represent an Ada catchpoint.  */
 
-struct ada_catchpoint : public base_breakpoint
+struct ada_catchpoint : public code_breakpoint
 {
   ada_catchpoint (struct gdbarch *gdbarch_,
 		  enum ada_exception_catchpoint_kind kind,
@@ -12113,12 +12113,12 @@ struct ada_catchpoint : public base_breakpoint
 		  bool tempflag,
 		  bool enabled,
 		  bool from_tty)
-    : base_breakpoint (gdbarch_, bp_catchpoint),
+    : code_breakpoint (gdbarch_, bp_catchpoint),
       m_kind (kind)
   {
     add_location (sal);
 
-    /* Unlike most base_breakpoint types, Ada catchpoints are
+    /* Unlike most code_breakpoint types, Ada catchpoints are
        pspace-specific.  */
     gdb_assert (sal.pspace != nullptr);
     this->pspace = sal.pspace;
@@ -12247,7 +12247,7 @@ ada_catchpoint::re_set ()
 {
   /* Call the base class's method.  This updates the catchpoint's
      locations.  */
-  this->base_breakpoint::re_set ();
+  this->code_breakpoint::re_set ();
 
   /* Reparse the exception conditional expressions.  One for each
      location.  */

gdb/break-catch-throw.c

@@ -65,15 +65,15 @@ static const struct exception_names exception_functions[] =
 
 /* The type of an exception catchpoint.  Unlike most catchpoints, this
    one is implemented with code breakpoints, so it inherits struct
-   base_breakpoint, not struct catchpoint.  */
+   code_breakpoint, not struct catchpoint.  */
 
-struct exception_catchpoint : public base_breakpoint
+struct exception_catchpoint : public code_breakpoint
 {
   exception_catchpoint (struct gdbarch *gdbarch,
 			bool temp, const char *cond_string_,
 			enum exception_event_kind kind_,
 			std::string &&except_rx)
-    : base_breakpoint (gdbarch, bp_catchpoint, temp, cond_string_),
+    : code_breakpoint (gdbarch, bp_catchpoint, temp, cond_string_),
       kind (kind_),
       exception_rx (std::move (except_rx)),
       pattern (exception_rx.empty ()

gdb/breakpoint.c

@@ -87,7 +87,7 @@
 static void map_breakpoint_numbers (const char *,
 				    gdb::function_view<void (breakpoint *)>);
 
-static void breakpoint_re_set_default (base_breakpoint *);
+static void breakpoint_re_set_default (code_breakpoint *);
 
 static void
   create_sals_from_location_default (struct event_location *location,
@@ -225,7 +225,7 @@ static void tracepoint_probe_create_sals_from_location
      (struct event_location *location,
       struct linespec_result *canonical);
 
-const struct breakpoint_ops base_breakpoint_ops =
+const struct breakpoint_ops code_breakpoint_ops =
 {
   create_sals_from_location_default,
   create_breakpoints_sal,
@@ -252,7 +252,7 @@ breakpoint::~breakpoint ()
 {
 }
 
-base_breakpoint::~base_breakpoint ()
+code_breakpoint::~code_breakpoint ()
 {
 }
 
@@ -261,9 +261,9 @@ catchpoint::~catchpoint ()
 }
 
 /* The structure to be used in regular breakpoints.  */
-struct ordinary_breakpoint : public base_breakpoint
+struct ordinary_breakpoint : public code_breakpoint
 {
-  using base_breakpoint::base_breakpoint;
+  using code_breakpoint::code_breakpoint;
 
   int resources_needed (const struct bp_location *) override;
   enum print_stop_action print_it (const bpstat *bs) const override;
@@ -275,11 +275,11 @@ struct ordinary_breakpoint : public base_breakpoint
    the program, and they end up installed on the breakpoint chain with
    a negative breakpoint number.  They're visible in "maint info
    breakpoints", but not "info breakpoints".  */
-struct internal_breakpoint : public base_breakpoint
+struct internal_breakpoint : public code_breakpoint
 {
   internal_breakpoint (struct gdbarch *gdbarch,
 		       enum bptype type, CORE_ADDR address)
-    : base_breakpoint (gdbarch, type)
+    : code_breakpoint (gdbarch, type)
   {
     symtab_and_line sal;
     sal.pc = address;
@@ -303,13 +303,13 @@ struct internal_breakpoint : public base_breakpoint
    on the breakpoint chain and they all same the same number (zero).
    They're visible in "maint info breakpoints", but not "info
    breakpoints".  */
-struct momentary_breakpoint : public base_breakpoint
+struct momentary_breakpoint : public code_breakpoint
 {
   momentary_breakpoint (struct gdbarch *gdbarch_, enum bptype bptype,
 			program_space *pspace_,
 			const struct frame_id &frame_id_,
 			int thread_)
-    : base_breakpoint (gdbarch_, bptype)
+    : code_breakpoint (gdbarch_, bptype)
   {
     /* If FRAME_ID is valid, it should be a real frame, not an inlined
        or tail-called one.  */
@@ -1290,11 +1290,11 @@ is_tracepoint (const struct breakpoint *b)
    TYPE.  */
 
 template<typename... Arg>
-static std::unique_ptr<base_breakpoint>
+static std::unique_ptr<code_breakpoint>
 new_breakpoint_from_type (struct gdbarch *gdbarch, bptype type,
 			  Arg&&... args)
 {
-  base_breakpoint *b;
+  code_breakpoint *b;
 
   switch (type)
     {
@@ -1325,7 +1325,7 @@ new_breakpoint_from_type (struct gdbarch *gdbarch, bptype type,
       gdb_assert_not_reached ("invalid type");
     }
 
-  return std::unique_ptr<base_breakpoint> (b);
+  return std::unique_ptr<code_breakpoint> (b);
 }
 
 /* A helper function that validates that COMMANDS are valid for a
@@ -5886,10 +5886,10 @@ bpstat_run_callbacks (bpstat *bs_head)
 	  handle_jit_event (bs->bp_location_at->address);
 	  break;
 	case bp_gnu_ifunc_resolver:
-	  gnu_ifunc_resolver_stop ((base_breakpoint *) b);
+	  gnu_ifunc_resolver_stop ((code_breakpoint *) b);
 	  break;
 	case bp_gnu_ifunc_resolver_return:
-	  gnu_ifunc_resolver_return_stop ((base_breakpoint *) b);
+	  gnu_ifunc_resolver_return_stop ((code_breakpoint *) b);
 	  break;
 	}
     }
@@ -8057,7 +8057,7 @@ handle_automatic_hardware_breakpoints (bp_location *bl)
 }
 
 bp_location *
-base_breakpoint::add_location (const symtab_and_line &sal)
+code_breakpoint::add_location (const symtab_and_line &sal)
 {
   struct bp_location *new_loc, **tmp;
   CORE_ADDR adjusted_address;
@@ -8215,7 +8215,7 @@ update_dprintf_commands (const char *args, int from_tty,
 	update_dprintf_command_list (b);
 }
 
-base_breakpoint::base_breakpoint (struct gdbarch *gdbarch_,
+code_breakpoint::code_breakpoint (struct gdbarch *gdbarch_,
 				  enum bptype type_,
 				  gdb::array_view<const symtab_and_line> sals,
 				  event_location_up &&location_,
@@ -8355,7 +8355,7 @@ create_breakpoint_sal (struct gdbarch *gdbarch,
 		       int enabled, int internal, unsigned flags,
 		       int display_canonical)
 {
-  std::unique_ptr<base_breakpoint> b
+  std::unique_ptr<code_breakpoint> b
     = new_breakpoint_from_type (gdbarch,
 				type,
 				sals,
@@ -8732,14 +8732,14 @@ breakpoint_ops_for_event_location_type (enum event_location_type location_type,
       if (location_type == PROBE_LOCATION)
 	return &tracepoint_probe_breakpoint_ops;
       else
-	return &base_breakpoint_ops;
+	return &code_breakpoint_ops;
     }
   else
     {
       if (location_type == PROBE_LOCATION)
 	return &bkpt_probe_breakpoint_ops;
       else
-	return &base_breakpoint_ops;
+	return &code_breakpoint_ops;
     }
 }
 
@@ -8752,7 +8752,7 @@ breakpoint_ops_for_event_location (const struct event_location *location,
   if (location != nullptr)
     return breakpoint_ops_for_event_location_type
       (event_location_type (location), is_tracepoint);
-  return &base_breakpoint_ops;
+  return &code_breakpoint_ops;
 }
 
 /* See breakpoint.h.  */
@@ -9087,7 +9087,7 @@ dprintf_command (const char *arg, int from_tty)
 		     0, bp_dprintf,
 		     0 /* Ignore count */,
 		     pending_break_support,
-		     &base_breakpoint_ops,
+		     &code_breakpoint_ops,
 		     from_tty,
 		     1 /* enabled */,
 		     0 /* internal */,
@@ -11461,7 +11461,7 @@ breakpoint::decode_location (struct event_location *location,
 /* Default breakpoint_ops methods.  */
 
 void
-base_breakpoint::re_set ()
+code_breakpoint::re_set ()
 {
   /* FIXME: is this still reachable?  */
   if (breakpoint_event_location_empty_p (this))
@@ -11475,7 +11475,7 @@ base_breakpoint::re_set ()
 }
 
 int
-base_breakpoint::insert_location (struct bp_location *bl)
+code_breakpoint::insert_location (struct bp_location *bl)
 {
   CORE_ADDR addr = bl->target_info.reqstd_address;
 
@@ -11499,7 +11499,7 @@ base_breakpoint::insert_location (struct bp_location *bl)
 }
 
 int
-base_breakpoint::remove_location (struct bp_location *bl,
+code_breakpoint::remove_location (struct bp_location *bl,
 				  enum remove_bp_reason reason)
 {
   if (bl->probe.prob != nullptr)
@@ -11515,7 +11515,7 @@ base_breakpoint::remove_location (struct bp_location *bl,
 }
 
 int
-base_breakpoint::breakpoint_hit (const struct bp_location *bl,
+code_breakpoint::breakpoint_hit (const struct bp_location *bl,
 				 const address_space *aspace,
 				 CORE_ADDR bp_addr,
 				 const target_waitstatus &ws)
@@ -11651,7 +11651,7 @@ ordinary_breakpoint::print_recreate (struct ui_file *fp) const
 }
 
 std::vector<symtab_and_line>
-base_breakpoint::decode_location (struct event_location *location,
+code_breakpoint::decode_location (struct event_location *location,
 				  struct program_space *search_pspace)
 {
   if (event_location_type (location) == PROBE_LOCATION)
@@ -12476,7 +12476,7 @@ hoist_existing_locations (struct breakpoint *b, struct program_space *pspace)
    untouched.  */
 
 void
-update_breakpoint_locations (base_breakpoint *b,
+update_breakpoint_locations (code_breakpoint *b,
 			     struct program_space *filter_pspace,
 			     gdb::array_view<const symtab_and_line> sals,
 			     gdb::array_view<const symtab_and_line> sals_end)
@@ -12684,7 +12684,7 @@ location_to_sals (struct breakpoint *b, struct event_location *location,
    locations.  */
 
 static void
-breakpoint_re_set_default (base_breakpoint *b)
+breakpoint_re_set_default (code_breakpoint *b)
 {
   struct program_space *filter_pspace = current_program_space;
   std::vector<symtab_and_line> expanded, expanded_end;
@@ -13515,7 +13515,7 @@ ftrace_command (const char *arg, int from_tty)
 		     bp_fast_tracepoint /* type_wanted */,
 		     0 /* Ignore count */,
 		     pending_break_support,
-		     &base_breakpoint_ops,
+		     &code_breakpoint_ops,
 		     from_tty,
 		     1 /* enabled */,
 		     0 /* internal */, 0);
@@ -13540,7 +13540,7 @@ strace_command (const char *arg, int from_tty)
     }
   else
     {
-      ops = &base_breakpoint_ops;
+      ops = &code_breakpoint_ops;
       location = string_to_event_location (&arg, current_language);
       type = bp_static_tracepoint;
     }
@@ -13623,7 +13623,7 @@ create_tracepoint_from_upload (struct uploaded_tp *utp)
 			  utp->type /* type_wanted */,
 			  0 /* Ignore count */,
 			  pending_break_support,
-			  &base_breakpoint_ops,
+			  &code_breakpoint_ops,
 			  0 /* from_tty */,
 			  utp->enabled /* enabled */,
 			  0 /* internal */,

gdb/breakpoint.h

@@ -849,7 +849,7 @@ protected:
 /* Abstract base class representing code breakpoints.  User "break"
    breakpoints, internal and momentary breakpoints, etc.  IOW, any
    kind of breakpoint whose locations are created from SALs.  */
-struct base_breakpoint : public breakpoint
+struct code_breakpoint : public breakpoint
 {
   using breakpoint::breakpoint;
 
@@ -857,7 +857,7 @@ struct base_breakpoint : public breakpoint
      description of the location, and COND_STRING as condition
      expression.  If LOCATION is NULL then create an "address
      location" from the address in the SAL.  */
-  base_breakpoint (struct gdbarch *gdbarch, bptype type,
+  code_breakpoint (struct gdbarch *gdbarch, bptype type,
 		   gdb::array_view<const symtab_and_line> sals,
 		   event_location_up &&location,
 		   gdb::unique_xmalloc_ptr<char> filter,
@@ -869,7 +869,7 @@ struct base_breakpoint : public breakpoint
 		   int enabled, unsigned flags,
 		   int display_canonical);
 
-  ~base_breakpoint () override = 0;
+  ~code_breakpoint () override = 0;
 
   /* Add a location for SAL to this breakpoint.  */
   bp_location *add_location (const symtab_and_line &sal);
@@ -985,9 +985,9 @@ extern bool is_exception_catchpoint (breakpoint *bp);
 /* An instance of this type is used to represent all kinds of
    tracepoints.  */
 
-struct tracepoint : public base_breakpoint
+struct tracepoint : public code_breakpoint
 {
-  using base_breakpoint::base_breakpoint;
+  using code_breakpoint::code_breakpoint;
 
   int breakpoint_hit (const struct bp_location *bl,
 		      const address_space *aspace, CORE_ADDR bp_addr,
@@ -1384,7 +1384,7 @@ extern void until_break_command (const char *, int, int);
 /* Initialize a struct bp_location.  */
 
 extern void update_breakpoint_locations
-  (base_breakpoint *b,
+  (code_breakpoint *b,
    struct program_space *filter_pspace,
    gdb::array_view<const symtab_and_line> sals,
    gdb::array_view<const symtab_and_line> sals_end);
@@ -1434,7 +1434,7 @@ extern void awatch_command_wrapper (const char *, int, bool);
 extern void rwatch_command_wrapper (const char *, int, bool);
 extern void tbreak_command (const char *, int);
 
-extern const struct breakpoint_ops base_breakpoint_ops;
+extern const struct breakpoint_ops code_breakpoint_ops;
 
 /* Arguments to pass as context to some catch command handlers.  */
 #define CATCH_PERMANENT ((void *) (uintptr_t) 0)
@@ -1463,7 +1463,7 @@ extern void install_breakpoint (int internal, std::unique_ptr<breakpoint> &&b,
 /* Returns the breakpoint ops appropriate for use with with LOCATION and
    according to IS_TRACEPOINT.  Use this to ensure, for example, that you pass
    the correct ops to create_breakpoint for probe locations.  If LOCATION is
-   NULL, returns base_breakpoint_ops.  */
+   NULL, returns code_breakpoint_ops.  */
 
 extern const struct breakpoint_ops *breakpoint_ops_for_event_location
   (const struct event_location *location, bool is_tracepoint);

gdb/elfread.c

@@ -927,7 +927,7 @@ elf_gnu_ifunc_resolve_addr (struct gdbarch *gdbarch, CORE_ADDR pc)
 /* Handle inferior hit of bp_gnu_ifunc_resolver, see its definition.  */
 
 static void
-elf_gnu_ifunc_resolver_stop (base_breakpoint *b)
+elf_gnu_ifunc_resolver_stop (code_breakpoint *b)
 {
   struct breakpoint *b_return;
   struct frame_info *prev_frame = get_prev_frame (get_current_frame ());
@@ -978,7 +978,7 @@ elf_gnu_ifunc_resolver_stop (base_breakpoint *b)
 /* Handle inferior hit of bp_gnu_ifunc_resolver_return, see its definition.  */
 
 static void
-elf_gnu_ifunc_resolver_return_stop (base_breakpoint *b)
+elf_gnu_ifunc_resolver_return_stop (code_breakpoint *b)
 {
   thread_info *thread = inferior_thread ();
   struct gdbarch *gdbarch = get_frame_arch (get_current_frame ());
@@ -1008,7 +1008,7 @@ elf_gnu_ifunc_resolver_return_stop (base_breakpoint *b)
 			    "gnu-indirect-function breakpoint type %d"),
 			  (int) b->type);
 	}
-      b = (base_breakpoint *) b_next;
+      b = (code_breakpoint *) b_next;
     }
   gdb_assert (b->type == bp_gnu_ifunc_resolver);
   gdb_assert (b->loc->next == NULL);

gdb/mi/mi-cmd-break.c

@@ -327,12 +327,12 @@ mi_cmd_break_insert_1 (int dprintf, const char *command, char **argv, int argc)
   else if (dprintf)
     {
       type_wanted = bp_dprintf;
-      ops = &base_breakpoint_ops;
+      ops = &code_breakpoint_ops;
     }
   else
     {
       type_wanted = hardware ? bp_hardware_breakpoint : bp_breakpoint;
-      ops = &base_breakpoint_ops;
+      ops = &code_breakpoint_ops;
     }
 
   if (is_explicit)

gdb/minsyms.c

@@ -1019,7 +1019,7 @@ stub_gnu_ifunc_resolve_name (const char *function_name,
 /* See elf_gnu_ifunc_resolver_stop for its real implementation.  */
 
 static void
-stub_gnu_ifunc_resolver_stop (base_breakpoint *b)
+stub_gnu_ifunc_resolver_stop (code_breakpoint *b)
 {
   internal_error (__FILE__, __LINE__,
 		  _("elf_gnu_ifunc_resolver_stop cannot be reached."));
@@ -1028,7 +1028,7 @@ stub_gnu_ifunc_resolver_stop (base_breakpoint *b)
 /* See elf_gnu_ifunc_resolver_return_stop for its real implementation.  */
 
 static void
-stub_gnu_ifunc_resolver_return_stop (base_breakpoint *b)
+stub_gnu_ifunc_resolver_return_stop (code_breakpoint *b)
 {
   internal_error (__FILE__, __LINE__,
 		  _("elf_gnu_ifunc_resolver_return_stop cannot be reached."));

gdb/python/py-finishbreakpoint.c

@@ -305,7 +305,7 @@ bpfinishpy_init (PyObject *self, PyObject *args, PyObject *kwargs)
 			 bp_breakpoint,
 			 0,
 			 AUTO_BOOLEAN_TRUE,
-			 &base_breakpoint_ops,
+			 &code_breakpoint_ops,
 			 0, 1, internal_bp, 0);
     }
   catch (const gdb_exception &except)

gdb/symtab.h

@@ -55,7 +55,7 @@ struct obj_section;
 struct cmd_list_element;
 class probe;
 struct lookup_name_info;
-struct base_breakpoint;
+struct code_breakpoint;
 
 /* How to match a lookup name against a symbol search name.  */
 enum class symbol_name_match_type
@@ -2228,10 +2228,10 @@ struct gnu_ifunc_fns
 				 CORE_ADDR *function_address_p);
 
   /* See elf_gnu_ifunc_resolver_stop for its real implementation.  */
-  void (*gnu_ifunc_resolver_stop) (base_breakpoint *b);
+  void (*gnu_ifunc_resolver_stop) (code_breakpoint *b);
 
   /* See elf_gnu_ifunc_resolver_return_stop for its real implementation.  */
-  void (*gnu_ifunc_resolver_return_stop) (base_breakpoint *b);
+  void (*gnu_ifunc_resolver_return_stop) (code_breakpoint *b);
 };
 
 #define gnu_ifunc_resolve_addr gnu_ifunc_fns_p->gnu_ifunc_resolve_addr