gdb: add new function quick_symbol_functions::has_unexpanded_symbols

Adds a new function to the quick_symbol_functions API to let us know
if there are any unexpanded symbols.  This functionality is required
by a later commit.  After this commit the functionality is unused, and
untested.

The new function objfile::has_unexpanded_symtabs is added to the
symfile-debug.c file which is a little strange, but this
is (currently) where many of the other objfile::* functions (that call
onto the quick_symbol_functions) are defined, so I'm reluctant to
break this pattern.

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* dwarf2/read.c (struct dwarf2_base_index_functions)
	<has_unexpanded_symtabs>: Declare.
	(dwarf2_base_index_functions::has_unexpanded_symtabs): Define new
	function.
	* objfiles.h (struct objfile) <has_unexpanded_symtabs>: Declare.
	* psympriv.h (struct psymbol_functions) <has_unexpanded_symtabs>:
	Declare.
	* psymtab.c (psymbol_functions::has_unexpanded_symtabs): Define
	new function.
	* quick-symbol.h (struct quick_symbol_functions)
	<has_unexpanded_symtabs>: Declare.
	* symfile-debug.c (objfile::has_unexpanded_symtabs): Define new
	function.

1 files changed, 25 insertions, 0 deletions

diff --git a/gdb/symfile-debug.c b/gdb/symfile-debug.c
index b839194e2f7..a10af68f5b1 100644
--- a/gdb/symfile-debug.c
+++ b/gdb/symfile-debug.c
@@ -100,6 +100,31 @@ objfile::has_partial_symbols ()
   return retval;
 }
 
+/* See objfiles.h.  */
+bool
+objfile::has_unexpanded_symtabs ()
+{
+  if (debug_symfile)
+    fprintf_filtered (gdb_stdlog, "qf->has_unexpanded_symtabs (%s)\n",
+		      objfile_debug_name (this));
+
+  bool result = false;
+  for (const auto &iter : qf)
+    {
+      if (iter->has_unexpanded_symtabs (this))
+	{
+	  result = true;
+	  break;
+	}
+    }
+
+  if (debug_symfile)
+    fprintf_filtered (gdb_stdlog, "qf->has_unexpanded_symtabs (%s) = %d\n",
+		      objfile_debug_name (this), (result ? 1 : 0));
+
+  return result;
+}
+
 struct symtab *
 objfile::find_last_source_symtab ()
 {