PR c++/18141, c++/18417.

gdb/ChangeLog:

	* cp-support.c (cp_lookup_rtti_type): Handle the case of NAME being
	a typedef.

gdb/testsuite/ChangeLog:

	* gdb.cp/iostream.cc: New file.
	* gdb.cp/iostream.exp: New file.

gdb/ChangeLog

@@ -1,3 +1,9 @@
+2015-05-26  Doug Evans  <dje@google.com>
+
+	PR c++/18141, c++/18417.
+	* cp-support.c (cp_lookup_rtti_type): Handle the case of NAME being
+	a typedef.
+
 2015-05-26  Doug Evans  <dje@google.com>
 
 	* NEWS: Add entries for command renamings.

gdb/cp-support.c

@@ -1453,7 +1453,9 @@ 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);
+  /* Use VAR_DOMAIN here as NAME may be a typedef.  PR 18141, 18417.
+     Classes "live" in both STRUCT_DOMAIN and VAR_DOMAIN.  */
+  rtti_sym = lookup_symbol (name, block, VAR_DOMAIN, NULL);
 
   if (rtti_sym == NULL)
     {
@@ -1467,7 +1469,7 @@ cp_lookup_rtti_type (const char *name, struct block *block)
       return NULL;
     }
 
-  rtti_type = SYMBOL_TYPE (rtti_sym);
+  rtti_type = check_typedef (SYMBOL_TYPE (rtti_sym));
 
   switch (TYPE_CODE (rtti_type))
     {

gdb/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2015-05-26  Doug Evans  <dje@google.com>
+
+	* gdb.cp/iostream.cc: New file.
+	* gdb.cp/iostream.exp: New file.
+
 2015-05-26  Doug Evans  <dje@google.com>
 
 	* gdb.dwarf2/dw2-op-call.exp: Update.

gdb/testsuite/gdb.cp/iostream.cc

@@ -0,0 +1,27 @@
+/* Code to go along with tests in rtti.exp.
+   
+   Copyright 2015 Free Software Foundation, 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 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/>.  */
+
+#include <iostream>
+
+int
+main ()
+{
+  std::cerr << "cerr\n";
+  return 0;
+}

gdb/testsuite/gdb.cp/iostream.exp

@@ -0,0 +1,44 @@
+# Copyright 2015 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/>.
+
+# This file is part of the gdb testsuite.
+# It tests various aspects of iostream that have caused problems for gdb.
+
+if { [skip_cplus_tests] } { continue }
+
+standard_testfile .cc
+
+if {[prepare_for_testing $testfile.exp $testfile $srcfile {debug c++}]} {
+    return -1
+}
+
+if ![runto_main] {
+    perror "couldn't run to breakpoint"
+    continue
+}
+
+# PR 18417
+# std::iostream is problematic because the minimal symbol for its vtable is
+# "_ZTVSo" which demangles as "vtable for std::ostream" and std::iostream
+# a typedef.
+set test "p std::cerr"
+gdb_test_multiple $test $test {
+    -re "warning: RTTI symbol for class '.*' has bad type.*$gdb_prompt $" {
+	fail $test
+    }
+    -re ".*$gdb_prompt $" {
+	pass $test
+    }
+}