Remove last objfile partial_symtab references from psymtab.c

This removes the last references to the partial_symtab via the objfile
from psymtab.c.  require_partial_symbols is now a method on
psymbol_functions, and maintenance_print_psymbols is changed to use
dynamic_cast to verify that it is examining partial symbols.

gdb/ChangeLog
2021-03-20  Tom Tromey  <tom@tromey.com>

	* psymtab.c (psymbol_functions::require_partial_symbols): Rename.
	(psymbol_functions::find_pc_sect_psymtab): Rename.
	(psymbol_functions::find_pc_sect_compunit_symtab)
	(maintenance_print_psymbols, maintenance_check_psymtabs): Update.
	* psympriv.h (struct psymbol_functions) <require_partial_symbols>:
	Declare new method.
	<get_partial_symtabs, find_pc_sect_psymtab>: Likewise.

gdb/ChangeLog

@@ -1,3 +1,13 @@
+2021-03-20  Tom Tromey  <tom@tromey.com>
+
+	* psymtab.c (psymbol_functions::require_partial_symbols): Rename.
+	(psymbol_functions::find_pc_sect_psymtab): Rename.
+	(psymbol_functions::find_pc_sect_compunit_symtab)
+	(maintenance_print_psymbols, maintenance_check_psymtabs): Update.
+	* psympriv.h (struct psymbol_functions) <require_partial_symbols>:
+	Declare new method.
+	<get_partial_symtabs, find_pc_sect_psymtab>: Likewise.
+
 2021-03-20  Tom Tromey  <tom@tromey.com>
 
 	* xcoffread.c (xcoff_start_psymtab): Add partial_symtabs parameter.

gdb/psympriv.h

@@ -559,6 +559,18 @@ struct psymbol_functions : public quick_symbol_functions
     m_psymbol_map.clear ();
   }
 
+  /* Ensure the partial symbols for OBJFILE have been loaded.  Return
+     a range adapter for the psymtabs.  */
+  psymtab_storage::partial_symtab_range require_partial_symbols
+       (struct objfile *objfile);
+
+  /* Return the partial symbol storage associated with this
+     object.  */
+  const std::shared_ptr<psymtab_storage> &get_partial_symtabs () const
+  {
+    return m_partial_symtabs;
+  }
+
   /* Replace the partial symbol table storage in this object with
      SYMS.  */
   void set_partial_symtabs (const std::shared_ptr<psymtab_storage> &syms)
@@ -566,6 +578,17 @@ struct psymbol_functions : public quick_symbol_functions
     m_partial_symtabs = syms;
   }
 
+  /* Find which partial symtab contains PC and SECTION.  Return NULL if
+     none.  We return the psymtab that contains a symbol whose address
+     exactly matches PC, or, if we cannot find an exact match, the
+     psymtab that contains a symbol whose address is closest to PC.  */
+
+  struct partial_symtab *find_pc_sect_psymtab
+       (struct objfile *objfile,
+	CORE_ADDR pc,
+	struct obj_section *section,
+	struct bound_minimal_symbol msymbol);
+
 private:
 
   void fill_psymbol_map (struct objfile *objfile,

gdb/psymtab.c

@@ -80,11 +80,11 @@ psymtab_storage::install_psymtab (partial_symtab *pst)
    returns a range adapter suitable for iterating over the psymtabs of
    OBJFILE.  */
 
-static psymtab_storage::partial_symtab_range
+psymtab_storage::partial_symtab_range
-require_partial_symbols (struct objfile *objfile)
+psymbol_functions::require_partial_symbols (struct objfile *objfile)
 {
   objfile->require_partial_symbols (true);
-  return objfile->psymtabs ();
+  return m_partial_symtabs->range ();
 }
 
 /* Helper function for psym_map_symtabs_matching_filename that
@@ -255,14 +255,10 @@ find_pc_sect_psymtab_closer (struct objfile *objfile,
   return best_pst;
 }
 
-/* Find which partial symtab contains PC and SECTION.  Return NULL if
+/* See psympriv.h.  */
-   none.  We return the psymtab that contains a symbol whose address
-   exactly matches PC, or, if we cannot find an exact match, the
-   psymtab that contains a symbol whose address is closest to PC.  */
 
-static struct partial_symtab *
+struct partial_symtab *
-find_pc_sect_psymtab (struct objfile *objfile,
+psymbol_functions::find_pc_sect_psymtab (struct objfile *objfile,
-		      psymtab_storage *partial_symtabs,
 					 CORE_ADDR pc,
 					 struct obj_section *section,
 					 struct bound_minimal_symbol msymbol)
@@ -279,14 +275,14 @@ find_pc_sect_psymtab (struct objfile *objfile,
      partial symtabs then we will end up returning a pointer to an object
      that is not a partial_symtab, which doesn't end well.  */
 
-  if (partial_symtabs->psymtabs != NULL
+  if (m_partial_symtabs->psymtabs != NULL
-      && partial_symtabs->psymtabs_addrmap != NULL)
+      && m_partial_symtabs->psymtabs_addrmap != NULL)
     {
       CORE_ADDR baseaddr = objfile->text_section_offset ();
 
       struct partial_symtab *pst
 	= ((struct partial_symtab *)
-	   addrmap_find (partial_symtabs->psymtabs_addrmap,
+	   addrmap_find (m_partial_symtabs->psymtabs_addrmap,
 			 pc - baseaddr));
       if (pst != NULL)
 	{
@@ -356,7 +352,6 @@ psymbol_functions::find_pc_sect_compunit_symtab
       int warn_if_readin)
 {
   struct partial_symtab *ps = find_pc_sect_psymtab (objfile,
-						    m_partial_symtabs.get (),
 						    pc, section,
 						    msymbol);
   if (ps != NULL)
@@ -1815,7 +1810,12 @@ maintenance_print_psymbols (const char *args, int from_tty)
       if (!print_for_objfile)
 	continue;
 
-      psymtab_storage *partial_symtabs = objfile->partial_symtabs.get ();
+      psymbol_functions *psf
+	= dynamic_cast<psymbol_functions *> (objfile->qf.get ());
+      if (psf == nullptr)
+	continue;
+
+      psymtab_storage *partial_symtabs = psf->get_partial_symtabs ().get ();
 
       if (address_arg != NULL)
 	{
@@ -1824,8 +1824,7 @@ maintenance_print_psymbols (const char *args, int from_tty)
 	  /* We don't assume each pc has a unique objfile (this is for
 	     debugging).  */
 	  struct partial_symtab *ps
-	    = find_pc_sect_psymtab (objfile, partial_symtabs, pc,
+	    = psf->find_pc_sect_psymtab (objfile, pc, section, msymbol);
-				    section, msymbol);
 	  if (ps != NULL)
 	    {
 	      if (!printed_objfile_header)
@@ -1841,7 +1840,7 @@ maintenance_print_psymbols (const char *args, int from_tty)
 	}
       else
 	{
-	  for (partial_symtab *ps : require_partial_symbols (objfile))
+	  for (partial_symtab *ps : psf->require_partial_symbols (objfile))
 	    {
 	      int print_for_source = 0;
 
@@ -1905,7 +1904,11 @@ maintenance_info_psymtabs (const char *regexp, int from_tty)
 	   actually find a symtab whose name matches.  */
 	int printed_objfile_start = 0;
 
-	for (partial_symtab *psymtab : require_partial_symbols (objfile))
+	psymbol_functions *psf
+	  = dynamic_cast<psymbol_functions *> (objfile->qf.get ());
+	if (psf == nullptr)
+	  continue;
+	for (partial_symtab *psymtab : psf->require_partial_symbols (objfile))
 	  {
 	    QUIT;
 
@@ -2005,7 +2008,13 @@ maintenance_check_psymtabs (const char *ignore, int from_tty)
   const struct block *b;
 
   for (objfile *objfile : current_program_space->objfiles ())
-    for (partial_symtab *ps : require_partial_symbols (objfile))
+    {
+      psymbol_functions *psf
+	= dynamic_cast<psymbol_functions *> (objfile->qf.get ());
+      if (psf == nullptr)
+	continue;
+
+      for (partial_symtab *ps : psf->require_partial_symbols (objfile))
 	{
 	  struct gdbarch *gdbarch = objfile->arch ();
 
@@ -2089,6 +2098,7 @@ maintenance_check_psymtabs (const char *ignore, int from_tty)
 	    }
 	}
     }
+}
 
 void _initialize_psymtab ();
 void