gdb: remove COMPUNIT_DIRNAME macro, add getter/setter

Add a getter and a setter for a compunit_symtab's dirname.  Remove the
corresponding macro and adjust all callers.

Change-Id: If2f39b295fd26822586485e04a8b8b5aa5cc9b2e

gdb/buildsym-legacy.c

@@ -303,7 +303,7 @@ restart_symtab (struct compunit_symtab *cust,
   buildsym_compunit
     = new struct buildsym_compunit (cust->objfile (),
 				    name,
-				    COMPUNIT_DIRNAME (cust),
+				    cust->dirname (),
 				    compunit_language (cust),
 				    start_addr,
 				    cust);

gdb/buildsym.c

@@ -1005,8 +1005,8 @@ buildsym_compunit::end_symtab_with_blockvector (struct block *static_block,
     {
       /* Reallocate the dirname on the symbol obstack.  */
       const char *comp_dir = m_comp_dir.get ();
-      COMPUNIT_DIRNAME (cu) = obstack_strdup (&m_objfile->objfile_obstack,
-					      comp_dir);
+      cu->set_dirname (obstack_strdup (&m_objfile->objfile_obstack,
+				       comp_dir));
     }
 
   /* Save the debug format string (if any) in the symtab.  */

gdb/dwarf2/read.c

@@ -10723,7 +10723,7 @@ dwarf2_cu::setup_type_unit_groups (struct die_info *die)
 	  struct compunit_symtab *cust = tug_unshare->compunit_symtab;
 	  m_builder.reset (new struct buildsym_compunit
 			   (cust->objfile (), "",
-			    COMPUNIT_DIRNAME (cust),
+			    cust->dirname (),
 			    compunit_language (cust),
 			    0, cust));
 	  list_in_scope = get_builder ()->get_file_symbols ();
@@ -10775,7 +10775,7 @@ dwarf2_cu::setup_type_unit_groups (struct die_info *die)
       struct compunit_symtab *cust = tug_unshare->compunit_symtab;
       m_builder.reset (new struct buildsym_compunit
 		       (cust->objfile (), "",
-			COMPUNIT_DIRNAME (cust),
+			cust->dirname (),
 			compunit_language (cust),
 			0, cust));
       list_in_scope = get_builder ()->get_file_symbols ();

gdb/jit.c

@@ -513,7 +513,7 @@ finalize_symtab (struct gdb_symtab *stab, struct objfile *objfile)
   add_compunit_symtab_to_objfile (cust);
 
   /* JIT compilers compile in memory.  */
-  COMPUNIT_DIRNAME (cust) = NULL;
+  cust->set_dirname (nullptr);
 
   /* Copy over the linetable entry if one was provided.  */
   if (stab->linetable)

gdb/macrotab.c

@@ -1066,7 +1066,7 @@ macro_source_fullname (struct macro_source_file *file)
   const char *comp_dir = NULL;
 
   if (file->table->compunit_symtab != NULL)
-    comp_dir = COMPUNIT_DIRNAME (file->table->compunit_symtab);
+    comp_dir = file->table->compunit_symtab->dirname ();
 
   if (comp_dir == NULL || IS_ABSOLUTE_PATH (file->filename))
     return file->filename;

gdb/symmisc.c

@@ -782,9 +782,8 @@ maintenance_info_symtabs (const char *regexp, int from_tty)
 					 (cust->producer () != nullptr
 					  ? cust->producer () : "(null)"));
 			printf_filtered ("    dirname %s\n",
-					 COMPUNIT_DIRNAME (cust) != NULL
-					 ? COMPUNIT_DIRNAME (cust)
-					 : "(null)");
+					 (cust->dirname () != NULL
+					  ? cust->dirname () : "(null)"));
 			printf_filtered ("    blockvector"
 					 " ((struct blockvector *) %s)\n",
 					 host_address_to_string

gdb/symtab.h

@@ -1413,8 +1413,7 @@ using symtab_range = next_range<symtab>;
 #define SYMTAB_OBJFILE(symtab) \
   (SYMTAB_COMPUNIT (symtab)->objfile ())
 #define SYMTAB_PSPACE(symtab) (SYMTAB_OBJFILE (symtab)->pspace)
-#define SYMTAB_DIRNAME(symtab) \
-  COMPUNIT_DIRNAME (SYMTAB_COMPUNIT (symtab))
+#define SYMTAB_DIRNAME(symtab) (SYMTAB_COMPUNIT (symtab)->dirname ())
 
 /* Compunit symtabs contain the actual "symbol table", aka blockvector, as well
    as the list of all source files (what gdb has historically associated with
@@ -1502,6 +1501,16 @@ struct compunit_symtab
     m_producer = producer;
   }
 
+  const char *dirname () const
+  {
+    return m_dirname;
+  }
+
+  void set_dirname (const char *dirname)
+  {
+    m_dirname = dirname;
+  }
+
   /* Make PRIMARY_FILETAB the primary filetab of this compunit symtab.
 
      PRIMARY_FILETAB must already be a filetab of this compunit symtab.  */
@@ -1551,7 +1560,7 @@ struct compunit_symtab
   const char *m_producer;
 
   /* Directory in which it was compiled, or NULL if we don't know.  */
-  const char *dirname;
+  const char *m_dirname;
 
   /* List of all symbol scope blocks for this symtab.  It is shared among
      all symtabs in a given compilation unit.  */
@@ -1597,7 +1606,6 @@ struct compunit_symtab
 
 using compunit_symtab_range = next_range<compunit_symtab>;
 
-#define COMPUNIT_DIRNAME(cust) ((cust)->dirname)
 #define COMPUNIT_BLOCKVECTOR(cust) ((cust)->blockvector)
 #define COMPUNIT_BLOCK_LINE_SECTION(cust) ((cust)->block_line_section)
 #define COMPUNIT_LOCATIONS_VALID(cust) ((cust)->locations_valid)