2003-12-04 Michael Chastain <mec.gnu@mindspring.com>

Partial fix for PR c++/1465.
	Fix for PR c++/1377.
	* cp-support.h (cp_lookup_rtti_type): New function.
	* cp-support.c (cp_lookup_rtti_type): New function.
	* gnu-v2-abi.c: Update copyright years.
	(gnuv2_rtti_type): Call cp_lookup_rtti_type.
	* gnu-v3-abi.c: Update copyright years.
	(gnuv3_rtti_type): Call cp_lookup_rtti_type.

gdb/ChangeLog

@@ -1,3 +1,14 @@
+2003-12-04  Michael Chastain  <mec.gnu@mindspring.com>
+
+	Partial fix for PR c++/1465.
+	Fix for PR c++/1377.
+	* cp-support.h (cp_lookup_rtti_type): New function.
+	* cp-support.c (cp_lookup_rtti_type): New function.
+	* gnu-v2-abi.c: Update copyright years.
+	(gnuv2_rtti_type): Call cp_lookup_rtti_type.
+	* gnu-v3-abi.c: Update copyright years.
+	(gnuv3_rtti_type): Call cp_lookup_rtti_type.
+
 2003-12-04  J. Brobecker  <brobecker@gnat.com>
 
 	* stabsread.c (read_type): Save a reference to types that are defined

gdb/cp-support.c

@@ -33,6 +33,7 @@
 #include "symtab.h"
 #include "block.h"
 #include "complaints.h"
+#include "gdbtypes.h"
 
 /* Functions related to demangled name parsing.  */
 
@@ -582,6 +583,48 @@ make_symbol_overload_list (struct symbol *fsym)
   return (sym_return_val);
 }
 
+/* Lookup the rtti type for a class name. */
+
+struct type *
+cp_lookup_rtti_type (const char *name, struct block *block)
+{
+  struct symbol * rtti_sym;
+  struct type * rtti_type;
+
+  rtti_sym = lookup_symbol (name, block, STRUCT_DOMAIN, NULL, NULL);
+
+  if (rtti_sym == NULL)
+    {
+      warning ("RTTI symbol not found for class '%s'", name);
+      return NULL;
+    }
+
+  if (SYMBOL_CLASS (rtti_sym) != LOC_TYPEDEF)
+    {
+      warning ("RTTI symbol for class '%s' is not a type", name);
+      return NULL;
+    }
+
+  rtti_type = SYMBOL_TYPE (rtti_sym);
+
+  switch (TYPE_CODE (rtti_type))
+    {
+    case TYPE_CODE_CLASS:
+      break;
+    case TYPE_CODE_NAMESPACE:
+      /* chastain/2003-11-26: the symbol tables often contain fake
+	 symbols for namespaces with the same name as the struct.
+	 This warning is an indication of a bug in the lookup order
+	 or a bug in the way that the symbol tables are populated.  */
+      warning ("RTTI symbol for class '%s' is a namespace", name);
+      return NULL;
+    default:
+      warning ("RTTI symbol for class '%s' has bad type", name);
+      return NULL;
+    }
+
+  return rtti_type;
+}
 
 /* Don't allow just "maintenance cplus".  */
 

gdb/cp-support.h

@@ -34,6 +34,7 @@ struct symbol;
 struct obstack;
 struct block;
 struct objfile;
+struct type;
 
 /* This struct is designed to store data from using directives.  It
    says that names from namespace INNER should be visible within
@@ -61,6 +62,9 @@ extern unsigned int cp_entire_prefix_len (const char *name);
 
 extern struct symbol **make_symbol_overload_list (struct symbol *);
 
+extern struct type *cp_lookup_rtti_type (const char *name,
+					 struct block *block);
+
 /* Functions/variables from cp-namespace.c.  */
 
 extern unsigned char processing_has_namespace_info;

gdb/gnu-v2-abi.c

@@ -1,6 +1,6 @@
 /* Abstraction of GNU v2 abi.
 
-   Copyright 2001, 2003 Free Software Foundation, Inc.
+   Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
 
    Contributed by Daniel Berlin <dberlin@redhat.com>
 
@@ -30,6 +30,7 @@
 #include "value.h"
 #include "demangle.h"
 #include "cp-abi.h"
+#include "cp-support.h"
 
 #include <ctype.h>
 
@@ -259,8 +260,8 @@ gnuv2_value_rtti_type (struct value *v, int *full, int *top, int *using_enc)
   *(strchr(demangled_name,' '))=0;
 
   /* Lookup the type for the name */
-  rtti_type=lookup_typename(demangled_name, (struct block *)0,1);
-
+  /* FIXME: chastain/2003-11-26: block=NULL is bogus.  See pr gdb/1465. */
+  rtti_type = cp_lookup_rtti_type (demangled_name, NULL);
   if (rtti_type == NULL)
     return NULL;
 

gdb/gnu-v3-abi.c

@@ -1,7 +1,7 @@
 /* Abstraction of GNU v3 abi.
    Contributed by Jim Blandy <jimb@redhat.com>
 
-   Copyright 2001, 2002 Free Software Foundation, Inc.
+   Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -23,6 +23,7 @@
 #include "defs.h"
 #include "value.h"
 #include "cp-abi.h"
+#include "cp-support.h"
 #include "demangle.h"
 #include "gdb_assert.h"
 #include "gdb_string.h"
@@ -196,7 +197,6 @@ gnuv3_rtti_type (struct value *value,
   struct minimal_symbol *vtable_symbol;
   const char *vtable_symbol_name;
   const char *class_name;
-  struct symbol *class_symbol;
   struct type *run_time_type;
   struct type *base_type;
   LONGEST offset_to_top;
@@ -255,26 +255,10 @@ gnuv3_rtti_type (struct value *value,
   class_name = vtable_symbol_name + 11;
 
   /* Try to look up the class name as a type name.  */
-  class_symbol = lookup_symbol (class_name, 0, STRUCT_DOMAIN, 0, 0);
-  if (! class_symbol)
-    {
-      warning ("can't find class named `%s', as given by C++ RTTI", class_name);
+  /* FIXME: chastain/2003-11-26: block=NULL is bogus.  See pr gdb/1465. */
+  run_time_type = cp_lookup_rtti_type (class_name, NULL);
+  if (run_time_type == NULL)
     return NULL;
-    }
-
-  /* Make sure the type symbol is sane.  (An earlier version of this
-     code would find constructor functions, who have the same name as
-     the class.)  */
-  if (SYMBOL_CLASS (class_symbol) != LOC_TYPEDEF
-      || TYPE_CODE (SYMBOL_TYPE (class_symbol)) != TYPE_CODE_CLASS)
-    {
-      warning ("C++ RTTI gives a class name of `%s', but that isn't a type name",
-	       class_name);
-      return NULL;
-    }
-
-  /* This is the object's run-time type!  */
-  run_time_type = SYMBOL_TYPE (class_symbol);
 
   /* Get the offset from VALUE to the top of the complete object.
      NOTE: this is the reverse of the meaning of *TOP_P.  */