Refactor quick-function installation in DWARF reader

While working on the previous patch, I saw that the handling of
quick-function installation could be unified
dwarf2_initialize_objfile.  In particular, at the end of the function,
if there is an index table, then it can be used to create the quick
function object.

This cleanup will be useful when rewriting the .debug_names reader.

diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index e0eb1f9ce3c560a56a1e544cbdc43e5a8187048a..84cbc1ac9afe6249a8e86a802f6ce6d4e364b396 100644 (file)
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -3190,8 +3190,7 @@ get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz)
   return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res);
 }
 
-static quick_symbol_functions_up make_cooked_index_funcs
-     (dwarf2_per_objfile *);
+static void start_debug_info_reader (dwarf2_per_objfile *);
 
 /* See dwarf2/public.h.  */
 
@@ -3236,23 +3235,13 @@ dwarf2_initialize_objfile (struct objfile *objfile,
   /* Was a GDB index already read when we processed an objfile sharing
      PER_BFD?  */
   else if (per_bfd->index_table != nullptr)
-    {
-      dwarf_read_debug_printf ("re-using symbols");
-      objfile->qf.push_front (per_bfd->index_table->make_quick_functions ());
-    }
+    dwarf_read_debug_printf ("re-using symbols");
   else if (dwarf2_read_debug_names (per_objfile))
-    {
-      dwarf_read_debug_printf ("found debug names");
-      objfile->qf.push_front
-       (per_bfd->index_table->make_quick_functions ());
-    }
+    dwarf_read_debug_printf ("found debug names");
   else if (dwarf2_read_gdb_index (per_objfile,
                                  get_gdb_index_contents_from_section<struct dwarf2_per_bfd>,
                                  get_gdb_index_contents_from_section<dwz_file>))
-    {
-      dwarf_read_debug_printf ("found gdb index from file");
-      objfile->qf.push_front (per_bfd->index_table->make_quick_functions ());
-    }
+    dwarf_read_debug_printf ("found gdb index from file");
   /* ... otherwise, try to find the index in the index cache.  */
   else if (dwarf2_read_gdb_index (per_objfile,
                             get_gdb_index_contents_from_cache,
@@ -3260,16 +3249,19 @@ dwarf2_initialize_objfile (struct objfile *objfile,
     {
       dwarf_read_debug_printf ("found gdb index from cache");
       global_index_cache.hit ();
-      objfile->qf.push_front (per_bfd->index_table->make_quick_functions ());
     }
   else
     {
       global_index_cache.miss ();
-      objfile->qf.push_front (make_cooked_index_funcs (per_objfile));
+      start_debug_info_reader (per_objfile);
     }
 
-  if (dwarf_synchronous && per_bfd->index_table != nullptr)
-    per_bfd->index_table->wait_completely ();
+  if (per_bfd->index_table != nullptr)
+    {
+      if (dwarf_synchronous)
+       per_bfd->index_table->wait_completely ();
+      objfile->qf.push_front (per_bfd->index_table->make_quick_functions ());
+    }
 
   return true;
 }
@@ -16910,10 +16902,10 @@ cooked_index_functions::expand_symtabs_matching
   return true;
 }
 
-/* Return a new cooked_index_functions object.  */
+/* Start reading .debug_info using the indexer.  */
 
-static quick_symbol_functions_up
-make_cooked_index_funcs (dwarf2_per_objfile *per_objfile)
+static void
+start_debug_info_reader (dwarf2_per_objfile *per_objfile)
 {
   /* Set the index table early so that sharing works even while
      scanning; and then start the scanning.  */
@@ -16923,8 +16915,6 @@ make_cooked_index_funcs (dwarf2_per_objfile *per_objfile)
   /* Don't start reading until after 'index_table' is set.  This
      avoids races.  */
   idx->start_reading ();
-
-  return quick_symbol_functions_up (new cooked_index_functions);
 }
 
 quick_symbol_functions_up