[PATCH 06/23] Make a few functions work with base_breakpoint instead of breakpoint

[Pedro Alves <pedro@palves.net>]

This makes tracepoints inherit from base_breakpoint, since their
locations are code locations.  If we do that, then we can eliminate
tracepoint::re_set and tracepoint::decode_location, as they are doing
the same as the base_breakpoint implementations.

With this, all breakpoint types created by new_breakpoint_from_type
are code breakpoints, i.e., base_breakpoint subclasses, and thus we
can make it return a base_breakpoint pointer.

Finally, init_breakpoint_sal can take a base_breakpoint pointer as
"self" pointer too.  This will let us convert this function to a
base_breakpoint ctor in a following patch.

Change-Id: I3a4073ff1a4c865f525588095c18dc42b744cb54
---
 gdb/breakpoint.c | 30 ++++++------------------------
 gdb/breakpoint.h |  9 ++-------
 2 files changed, 8 insertions(+), 31 deletions(-)

diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 1c1dbfb3ad7..3df3eb8979d 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -1258,10 +1258,10 @@ is_tracepoint (const struct breakpoint *b)
 /* Factory function to create an appropriate instance of breakpoint given
    TYPE.  */
 
-static std::unique_ptr<breakpoint>
+static std::unique_ptr<base_breakpoint>
 new_breakpoint_from_type (struct gdbarch *gdbarch, bptype type)
 {
-  breakpoint *b;
+  base_breakpoint *b;
 
   switch (type)
     {
@@ -1317,7 +1317,7 @@ new_breakpoint_from_type (struct gdbarch *gdbarch, bptype type)
       gdb_assert_not_reached ("invalid type");
     }
 
-  return std::unique_ptr<breakpoint> (b);
+  return std::unique_ptr<base_breakpoint> (b);
 }
 
 /* A helper function that validates that COMMANDS are valid for a
@@ -8297,7 +8297,7 @@ update_dprintf_commands (const char *args, int from_tty,
    "address location" from the address in the SAL.  */
 
 static void
-init_breakpoint_sal (struct breakpoint *b, struct gdbarch *gdbarch,
+init_breakpoint_sal (base_breakpoint *b, struct gdbarch *gdbarch,
 		     gdb::array_view<const symtab_and_line> sals,
 		     event_location_up &&location,
 		     gdb::unique_xmalloc_ptr<char> filter,
@@ -8359,7 +8359,7 @@ init_breakpoint_sal (struct breakpoint *b, struct gdbarch *gdbarch,
 	  if (type == bp_static_tracepoint
 	      || type == bp_static_marker_tracepoint)
 	    {
-	      struct tracepoint *t = (struct tracepoint *) b;
+	      auto *t = static_cast <struct tracepoint *> (b);
 	      struct static_tracepoint_marker marker;
 
 	      if (strace_marker_p (b))
@@ -8453,7 +8453,7 @@ create_breakpoint_sal (struct gdbarch *gdbarch,
 		       int enabled, int internal, unsigned flags,
 		       int display_canonical)
 {
-  std::unique_ptr<breakpoint> b = new_breakpoint_from_type (gdbarch, type);
+  std::unique_ptr<base_breakpoint> b = new_breakpoint_from_type (gdbarch, type);
 
   init_breakpoint_sal (b.get (), gdbarch,
 		       sals, std::move (location),
@@ -11952,14 +11952,6 @@ bkpt_probe_decode_location (struct breakpoint *b,
   return sals;
 }
 
-/* The breakpoint_ops structure to be used in tracepoints.  */
-
-void
-tracepoint::re_set ()
-{
-  breakpoint_re_set_default (this);
-}
-
 int
 tracepoint::breakpoint_hit (const struct bp_location *bl,
 			    const address_space *aspace, CORE_ADDR bp_addr,
@@ -12034,16 +12026,6 @@ tracepoint::print_recreate (struct ui_file *fp) const
     gdb_printf (fp, "  passcount %d\n", pass_count);
 }
 
-std::vector<symtab_and_line>
-tracepoint::decode_location (struct event_location *location,
-			     struct program_space *search_pspace)
-{
-  if (event_location_type (location) == PROBE_LOCATION)
-    return bkpt_probe_decode_location (this, location, search_pspace);
-
-  return decode_location_default (this, location, search_pspace);
-}
-
 /* Virtual table for tracepoints on static probes.  */
 
 static void
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index b7e3b4dc6a1..48ceceabb3d 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -974,21 +974,16 @@ extern bool is_exception_catchpoint (breakpoint *bp);
 /* An instance of this type is used to represent all kinds of
    tracepoints.  */
 
-struct tracepoint : public breakpoint
+struct tracepoint : public base_breakpoint
 {
-  using breakpoint::breakpoint;
+  using base_breakpoint::base_breakpoint;
 
-  void re_set () override;
   int breakpoint_hit (const struct bp_location *bl,
 		      const address_space *aspace, CORE_ADDR bp_addr,
 		      const target_waitstatus &ws) override;
   void print_one_detail (struct ui_out *uiout) const override;
   void print_mention () const override;
   void print_recreate (struct ui_file *fp) const override;
-  std::vector<symtab_and_line> decode_location
-       (struct event_location *location,
-	struct program_space *search_pspace) override;
-
 
   /* Number of times this tracepoint should single-step and collect
      additional data.  */
-- 
2.36.0