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, 18 insertions, 0 deletions

diff --git a/gdb/psymtab.c b/gdb/psymtab.c
index cbd21b3209f..069052d712c 100644
--- a/gdb/psymtab.c
+++ b/gdb/psymtab.c
@@ -1184,6 +1184,24 @@ psymbol_functions::has_symbols (struct objfile *objfile)
   return m_partial_symtabs->psymtabs != NULL;
 }
 
+/* See quick_symbol_functions::has_unexpanded_symtabs in quick-symbol.h.  */
+
+bool
+psymbol_functions::has_unexpanded_symtabs (struct objfile *objfile)
+{
+  for (partial_symtab *psymtab : require_partial_symbols (objfile))
+    {
+      /* Is this already expanded?  */
+      if (psymtab->readin_p (objfile))
+	continue;
+
+      /* It has not yet been expanded.  */
+      return true;
+    }
+
+  return false;
+}
+
 /* Helper function for psym_find_compunit_symtab_by_address that fills
    in m_psymbol_map for a given range of psymbols.  */