From: Gabriel Dos Reis <gdr@integrable-solutions.net>
Date: Sun, 22 Jan 2006 17:32:30 +0000 (+0000)
Subject: re PR c++/10891 (code using dynamic_cast causes segfaults when -fno-rtti is used)
X-Git-Tag: releases/gcc-4.2.0~4686
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9384e67e4ae1ef2d74ec4eaf4deade9c79d657ab;p=thirdparty%2Fgcc.git

re PR c++/10891 (code using dynamic_cast causes segfaults when -fno-rtti is used)

2006-01-22  Gabriel Dos Reis  <gdr@integrable-solutions.net>

        PR c++/10891
        * rtti.c (build_dynamic_cast): Reject dynamic_cast use if
        -fno-rtti.

testsuite/
2006-01-22  Gabriel Dos Reis  <gdr@integrable-solutions.net>

        PR c++/10891
        * g++.dg/rtti/no-rtti.C: New.

From-SVN: r110092
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index ea7355bcccec..a4ff093795d8 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2006-01-22  Gabriel Dos Reis  <gdr@integrable-solutions.net>
+
+	PR c++/10891
+	* rtti.c (build_dynamic_cast): Reject dynamic_cast use if
+	-fno-rtti. 
+
 2006-01-21  Mark Mitchell  <mark@codesourcery.com>
 
 	PR c++/25895
diff --git a/gcc/cp/rtti.c b/gcc/cp/rtti.c
index 8a3582de3de1..e8cb52b9c55c 100644
--- a/gcc/cp/rtti.c
+++ b/gcc/cp/rtti.c
@@ -699,6 +699,14 @@ build_dynamic_cast (tree type, tree expr)
   if (type == error_mark_node || expr == error_mark_node)
     return error_mark_node;
 
+  /* Use of dynamic_cast when -fno-rtti is a disaster waiting to happen.
+     See PR C++/10891.  Reject.  */
+  if (!flag_rtti)
+    {
+      error ("%<dynamic_cast%> not permitted with -fno-rtti");
+      return error_mark_node;
+    }
+
   if (processing_template_decl)
     {
       expr = build_min (DYNAMIC_CAST_EXPR, type, expr);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 07aa699ca0c6..57945e8ad34c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2006-01-22  Gabriel Dos Reis  <gdr@integrable-solutions.net>
+
+	PR c++/10891
+	* g++.dg/rtti/no-rtti.C: New.
+
 2006-01-21  Mark Mitchell  <mark@codesourcery.com>
 
 	PR c++/25895
diff --git a/gcc/testsuite/g++.dg/rtti/no-rtti.C b/gcc/testsuite/g++.dg/rtti/no-rtti.C
new file mode 100644
index 000000000000..ca9cb72fdff1
--- /dev/null
+++ b/gcc/testsuite/g++.dg/rtti/no-rtti.C
@@ -0,0 +1,18 @@
+// { dg-do compile }
+// { dg-options "-fno-rtti" }
+
+// PR C++/10891
+
+struct A {
+   virtual ~A() { }
+};
+
+struct B : A {
+};
+
+A* f();
+
+int main()
+{
+   B* b = dynamic_cast<B*>(f()); // { dg-error "error: " }
+}