2009-06-29 Sami Wagiaalla <swagiaal@redhat.com>

* dwarf2read.c (read_import_statement): Properly set import location
	and destination.
	* cp-support.h (cp_add_using, cp_add_using_directive): Now take char*
	inner, char* outer arguments. Updated callers.

2009-06-29  Sami Wagiaalla  <swagiaal@redhat.com>

	* gdb.cp/namespace-nested-import.cc: New test.
	* gdb.cp/namespace-nested-import.exp: New test.

gdb/ChangeLog

@@ -1,3 +1,10 @@
+2009-06-29  Sami Wagiaalla  <swagiaal@redhat.com>
+
+	* dwarf2read.c (read_import_statement): Properly set import location
+	and destination.
+	* cp-support.h (cp_add_using, cp_add_using_directive): Now take char*
+	inner, char* outer arguments. Updated callers.
+
 2009-06-29  Ulrich Weigand  <uweigand@de.ibm.com>
 
 	* value.h (value_subscript, value_subscripted_rvalue,

gdb/cp-namespace.c

@@ -103,14 +103,23 @@ cp_scan_for_anonymous_namespaces (const struct symbol *symbol)
 			  "(anonymous namespace)",
 			  ANONYMOUS_NAMESPACE_LEN) == 0)
 	    {
+	      int outer_len = (previous_component == 0 ? 0 : previous_component - 2);
+	      int inner_len = next_component;
+
+	      char *outer = alloca (outer_len + 1);
+	      char *inner = alloca (inner_len + 1);
+
+	      memcpy (outer, name, outer_len);
+	      memcpy (inner, name, inner_len);
+
+	      outer[outer_len] = '\0';
+	      inner[inner_len] = '\0';
+
 	      /* We've found a component of the name that's an
 		 anonymous namespace.  So add symbols in it to the
 		 namespace given by the previous component if there is
 		 one, or to the global namespace if there isn't.  */
-	      cp_add_using_directive (name,
-				      previous_component == 0
-				      ? 0 : previous_component - 2,
-				      next_component);
+	      cp_add_using_directive (outer, inner);
 	    }
 	  /* The "+ 2" is for the "::".  */
 	  previous_component = next_component + 2;
@@ -121,16 +130,11 @@ cp_scan_for_anonymous_namespaces (const struct symbol *symbol)
     }
 }
 
-/* Add a using directive to using_list.  NAME is the start of a string
-   that should contain the namespaces we want to add as initial
-   substrings, OUTER_LENGTH is the end of the outer namespace, and
-   INNER_LENGTH is the end of the inner namespace.  If the using
-   directive in question has already been added, don't add it
-   twice.  */
+/* Add a using directive to using_list. If the using directive in question
+   has already been added, don't add it twice.  */
 
 void
-cp_add_using_directive (const char *name, unsigned int outer_length,
-			unsigned int inner_length)
+cp_add_using_directive (const char *outer, const char *inner)
 {
   struct using_direct *current;
   struct using_direct *new;
@@ -139,14 +143,13 @@ cp_add_using_directive (const char *name, unsigned int outer_length,
 
   for (current = using_directives; current != NULL; current = current->next)
     {
-      if ((strncmp (current->inner, name, inner_length) == 0)
-	  && (strlen (current->inner) == inner_length)
-	  && (strlen (current->outer) == outer_length))
+      if (strcmp (current->inner, inner) == 0
+          && strcmp (current->outer, outer) == 0)
 	return;
     }
 
-  using_directives = cp_add_using (name, inner_length, outer_length,
-                                   using_directives);
+  using_directives = cp_add_using (outer, inner, using_directives);
+
 }
 
 /* Record the namespace that the function defined by SYMBOL was
@@ -197,26 +200,22 @@ cp_is_anonymous (const char *namespace)
 	  != NULL);
 }
 
-/* Create a new struct using direct whose inner namespace is the
-   initial substring of NAME of leng INNER_LEN and whose outer
-   namespace is the initial substring of NAME of length OUTER_LENGTH.
+/* Create a new struct using direct whose inner namespace is INNER
+   and whose outer namespace is OUTER.
    Set its next member in the linked list to NEXT; allocate all memory
    using xmalloc.  It copies the strings, so NAME can be a temporary
    string.  */
 
 struct using_direct *
-cp_add_using (const char *name,
-	      unsigned int inner_len,
-	      unsigned int outer_len,
+cp_add_using (const char *outer,
+              const char *inner,
 	      struct using_direct *next)
 {
   struct using_direct *retval;
 
-  gdb_assert (outer_len < inner_len);
-
   retval = xmalloc (sizeof (struct using_direct));
-  retval->inner = savestring (name, inner_len);
-  retval->outer = savestring (name, outer_len);
+  retval->inner = savestring (inner, strlen(inner));
+  retval->outer = savestring (outer, strlen(outer));
   retval->next = next;
 
   return retval;

gdb/cp-support.h

@@ -76,13 +76,11 @@ extern struct type *cp_lookup_rtti_type (const char *name,
 
 extern int cp_is_anonymous (const char *namespace);
 
-extern void cp_add_using_directive (const char *name,
-				    unsigned int outer_length,
-				    unsigned int inner_length);
+extern void cp_add_using_directive (const char *outer,
+                                    const char *inner);
 
-extern struct using_direct *cp_add_using (const char *name,
-					  unsigned int inner_len,
-					  unsigned int outer_len,
+extern struct using_direct *cp_add_using (const char *outer,
+                                          const char *inner,
 					  struct using_direct *next);
 
 extern void cp_initialize_namespace (void);

gdb/dwarf2read.c

@@ -3043,6 +3043,9 @@ read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
   struct attribute *import_attr;
   struct die_info *imported_die;
   const char *imported_name;
+  const char *imported_name_prefix;
+  const char *import_prefix;
+  char *canonical_name;
 
   import_attr = dwarf2_attr (die, DW_AT_import, cu);
   if (import_attr == NULL)
@@ -3093,8 +3096,27 @@ read_import_statement (struct die_info *die, struct dwarf2_cu *cu)
 
   /* FIXME: dwarf2_name (die); for the local name after import.  */
 
-  using_directives = cp_add_using (imported_name, strlen (imported_name), 0,
-                                   using_directives);
+  /* Figure out where the statement is being imported to.  */
+  import_prefix = determine_prefix (die, cu);
+
+  /* Figure out what the scope of the imported die is and prepend it
+     to the name of the imported die.  */
+  imported_name_prefix = determine_prefix (imported_die, cu);
+
+  if (strlen (imported_name_prefix) > 0)
+    {
+      canonical_name = alloca (strlen (imported_name_prefix) + 2 + strlen (imported_name) + 1);
+      strcpy (canonical_name, imported_name_prefix);
+      strcat (canonical_name, "::");
+      strcat (canonical_name, imported_name);
+    }
+  else
+    {
+      canonical_name = alloca (strlen (imported_name) + 1);
+      strcpy (canonical_name, imported_name);
+    }
+
+  using_directives = cp_add_using (import_prefix,canonical_name, using_directives);
 }
 
 static void
@@ -5053,9 +5075,7 @@ read_namespace (struct die_info *die, struct dwarf2_cu *cu)
       if (is_anonymous)
 	{
 	  const char *previous_prefix = determine_prefix (die, cu);
-	  cp_add_using_directive (TYPE_NAME (type),
-				  strlen (previous_prefix),
-				  strlen (TYPE_NAME (type)));
+	  cp_add_using_directive (previous_prefix, TYPE_NAME (type));
 	}
     }
 

gdb/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2009-06-29  Sami Wagiaalla  <swagiaal@redhat.com>
+
+	* gdb.cp/namespace-nested-import.cc: New test.
+	* gdb.cp/namespace-nested-import.exp: New test.
+
 2009-06-27  Daniel Jacobowitz  <dan@codesourcery.com>
 
 	* gdb.base/break.exp: Add an XFAIL for gcc/36748.

gdb/testsuite/gdb.cp/namespace-nested-import.cc

@@ -0,0 +1,12 @@
+namespace A{
+  namespace B{
+    namespace C{
+      int       x = 5;
+    }
+  }
+}
+
+int main(){
+  using namespace A::B;
+  return C::x;
+}

gdb/testsuite/gdb.cp/namespace-nested-import.exp

@@ -0,0 +1,48 @@
+# Copyright 2008 Free Software Foundation, Inc.
+
+# 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 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# 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, see <http://www.gnu.org/licenses/>.
+
+if $tracelevel then {
+    strace $tracelevel
+}
+
+set prms_id 0
+set bug_id 0
+
+set testfile namespace-nested-import
+set srcfile ${testfile}.cc
+set binfile ${objdir}/${subdir}/${testfile}
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug c++}] != "" } {
+    untested "Couldn't compile test program"
+    return -1
+}
+
+# Get things started.
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_load ${binfile}
+
+############################################
+# Test printing of a variable from a nested
+# in a namespace inner to the one which has
+# been imported.
+
+if ![runto_main] then {
+    perror "couldn't run to breakpoint main"
+    continue
+}
+
+gdb_test "print C::x" "= 5"