X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fmacroscope.c;h=18852611b02072e0b79f9be451149e54af3853ff;hb=ca5f395d6255337974262b4a6f40da531fcf6204;hp=25860d4159b104b0f91510a274a113fada2d3fcb;hpb=d5d6fca504d03e4fa016dc91935e7dbc6d1df20e;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/macroscope.c b/gdb/macroscope.c
index 25860d4159..18852611b0 100644
--- a/gdb/macroscope.c
+++ b/gdb/macroscope.c
@@ -1,12 +1,12 @@
 /* Functions for deciding which macros are currently in scope.
-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2007, 2008, 2009 Free Software Foundation, Inc.
    Contributed by Red Hat, Inc.
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -15,9 +15,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
 
@@ -29,6 +27,13 @@
 #include "inferior.h"
 #include "complaints.h"
 
+/* A table of user-defined macros.  Unlike the macro tables used for
+   symtabs, this one uses xmalloc for all its allocation, not an
+   obstack, and it doesn't bcache anything; it just xmallocs things.  So
+   it's perfectly possible to remove things from this, or redefine
+   things.  */
+struct macro_table *macro_user_macros;
+
 
 struct macro_scope *
 sal_macro_scope (struct symtab_and_line sal)
@@ -79,22 +84,29 @@ sal_macro_scope (struct symtab_and_line sal)
 }
 
 
+struct macro_scope *
+user_macro_scope (void)
+{
+  struct macro_scope *ms;
+  ms = XNEW (struct macro_scope);
+  ms->file = macro_main (macro_user_macros);
+  ms->line = -1;
+  return ms;
+}
+
 struct macro_scope *
 default_macro_scope (void)
 {
   struct symtab_and_line sal;
   struct macro_scope *ms;
+  struct frame_info *frame;
 
-  /* If there's a selected frame, use its PC.  */ 
-  if (deprecated_selected_frame)
-    sal = find_pc_line (get_frame_pc (deprecated_selected_frame), 0);
+  /* If there's a selected frame, use its PC.  */
+  frame = deprecated_safe_get_selected_frame ();
+  if (frame)
+    sal = find_pc_line (get_frame_pc (frame), 0);
   
-  /* If the target has any registers at all, then use its PC.  Why we
-     would have registers but no stack, I'm not sure.  */
-  else if (target_has_registers)
-    sal = find_pc_line (read_pc (), 0);
-
-  /* If all else fails, fall back to the current listing position.  */
+  /* Fall back to the current listing position.  */
   else
     {
       /* Don't call select_source_symtab here.  That can raise an
@@ -115,7 +127,11 @@ default_macro_scope (void)
       sal.line = cursal.line;
     }
 
-  return sal_macro_scope (sal);
+  ms = sal_macro_scope (sal);
+  if (! ms)
+    ms = user_macro_scope ();
+
+  return ms;
 }
 
 
@@ -126,6 +142,22 @@ struct macro_definition *
 standard_macro_lookup (const char *name, void *baton)
 {
   struct macro_scope *ms = (struct macro_scope *) baton;
+  struct macro_definition *result;
 
-  return macro_lookup_definition (ms->file, ms->line, name);
+  /* Give user-defined macros priority over all others.  */
+  result = macro_lookup_definition (macro_main (macro_user_macros), -1, name);
+  if (! result)
+    result = macro_lookup_definition (ms->file, ms->line, name);
+  return result;
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+extern initialize_file_ftype _initialize_macroscope;
+
+void
+_initialize_macroscope (void)
+{
+  macro_user_macros = new_macro_table (0, 0);
+  macro_set_main (macro_user_macros, "<user-defined>");
+  macro_allow_redefinitions (macro_user_macros);
 }