re PR c++/11174 (derived class can access protected base class member function…

re PR c++/11174 (derived class can access protected base class member function through pointer to member function)

	PR c++/11174
	* init.c (build_offset_ref): Perform access checking for
	pointer to member correctly.

	* g++.dg/parse/access4.C: New test.
	* g++.dg/parse/access5.C: Likewise.
	* g++.old-deja/g++.jason/access17.C: Adjust error message.

From-SVN: r70566

gcc/cp/ChangeLog

+2003-08-19  Kriang Lerdsuwanakij  <lerdsuwa@users.sourceforge.net>
+
+	PR c++/11174
+	* init.c (build_offset_ref): Perform access checking for
+	pointer to member correctly.
+
 2003-08-19  Gabriel Dos Reis  <gdr@integrable-solutions.net>
 
 	* cp-lang.c (LANG_HOOKS_INITIALIZE_DIAGNOSTICS): Fix spelling.

gcc/cp/init.c

@@ -1502,8 +1502,20 @@ build_offset_ref (tree type, tree name, bool address_p)
 	  /* Get rid of a potential OVERLOAD around it */
 	  t = OVL_CURRENT (t);
 
-	  /* unique functions are handled easily.  */
-	  perform_or_defer_access_check (basebinfo, t);
+	  /* Unique functions are handled easily.  */
+
+	  /* For non-static member of base class, we need a special rule
+	     for access checking [class.protected]:
+
+	       If the access is to form a pointer to member, the
+	       nested-name-specifier shall name the derived class
+	       (or any class derived from that class).  */
+	  if (address_p && DECL_P (t)
+	      && DECL_NONSTATIC_MEMBER_P (t))
+	    perform_or_defer_access_check (TYPE_BINFO (type), t);
+	  else
+	    perform_or_defer_access_check (basebinfo, t);
+
 	  mark_used (t);
 	  if (DECL_STATIC_FUNCTION_P (t))
 	    return t;
@@ -1515,6 +1527,11 @@ build_offset_ref (tree type, tree name, bool address_p)
 	  member = fnfields;
 	}
     }
+  else if (address_p && TREE_CODE (member) == FIELD_DECL)
+    /* We need additional test besides the one in
+       check_accessibility_of_qualified_id in case it is
+       a pointer to non-static member.  */
+    perform_or_defer_access_check (TYPE_BINFO (type), member);
 
   if (!address_p)
     {

gcc/testsuite/ChangeLog

+2003-08-19  Kriang Lerdsuwanakij  <lerdsuwa@users.sourceforge.net>
+
+	PR c++/11174
+	* g++.dg/parse/access4.C: New test.
+	* g++.dg/parse/access5.C: Likewise.
+	* g++.old-deja/g++.jason/access17.C: Adjust error message.
+
 2003-08-18  Matt Kraai  <kraai@alumni.cmu.edu>
 
 	* gcc.dg/noncompile/20030818-1.c: New.

gcc/testsuite/g++.dg/parse/access4.C

+// { dg-do compile }
+
+// Origin: Mike Reed <mike.reed@amadron.com>
+
+// PR c++/11174: Access checking of pointer-to-member function
+
+class A {
+protected:
+  void foo() {}			// { dg-error "protected" }
+public:
+  A();
+};
+
+class B : public A {
+  void bar() {
+    A a;
+    void (A::*pmf)() = &A::foo;	// { dg-error "this context" }
+    (a.*pmf)();
+  }
+};

gcc/testsuite/g++.dg/parse/access5.C

+// { dg-do compile }
+
+// Origin: Giovanni Bajo <giovannibajo@libero.it>
+
+// PR c++/11174: Access checking on pointer to member data.
+
+struct A 
+{
+protected:
+  int a;			// { dg-error "protected" }
+};
+
+struct B : A 
+{
+  void foo() {
+    (void)&A::a;		// { dg-error "this context" }
+  }
+};

gcc/testsuite/g++.old-deja/g++.jason/access17.C

@@ -13,7 +13,7 @@ struct B: public A {
 };
 
 int A::* B::p = &A::i;         // { dg-error "" } 
-int (A::* B::fp)() = &A::f;    // ERROR -
+int (A::* B::fp)() = &A::f;    // { dg-error "" }
 
 struct C {
   static int A::*p;