Use registry in gdbarch

gdbarch implements its own registry-like approach.  This patch changes
it to instead use registry.h.  It's a rather large patch but largely
uninteresting -- it's mostly a straightforward conversion from the old
approach to the new one.

The main benefit of this change is that it introduces type safety to
the gdbarch registry.  It also removes a bunch of code.

One possible drawback is that, previously, the gdbarch registry
differentiated between pre- and post-initialization setup.  This
doesn't seem very important to me, though.

1 files changed, 2 insertions, 2 deletions

diff --git a/gdb/gdbarch.py b/gdb/gdbarch.py
index 5a261ba572..696b3028e6 100755
--- a/gdb/gdbarch.py
+++ b/gdb/gdbarch.py
@@ -261,6 +261,8 @@ with open("gdbarch.c", "w") as f:
     print(file=f)
     print("  /* An obstack bound to the lifetime of the architecture.  */", file=f)
     print("  auto_obstack obstack;", file=f)
+    print("  /* Registry.  */", file=f)
+    print("  registry<gdbarch> registry_fields;", file=f)
     print(file=f)
     print("  /* basic architectural information.  */", file=f)
     for c in filter(info, components):
@@ -296,8 +298,6 @@ with open("gdbarch.c", "w") as f:
     print("", file=f)
     print("  gdbarch = new struct gdbarch;", file=f)
     print(file=f)
-    print("  alloc_gdbarch_data (gdbarch);", file=f)
-    print(file=f)
     print("  gdbarch->tdep = tdep;", file=f)
     print(file=f)
     for c in filter(info, components):