re PR libstdc++/12438 (Memory leak in locale::combine())

2003-09-30  Paolo Carlini  <pcarlini@unitus.it>

	PR libstdc++/12438
	* include/bits/locale_facets.tcc (locale::combine): Don't
	leak memory if _M_replace_facet throws.
	* testsuite/22_locale/locale/cons/12438.cc: New, from the PR.

	* include/bits/locale_classes.h (locale::locale(const locale&,
	_Facet*)): Tweak, use consistently _M_remove_reference.

From-SVN: r71943

libstdc++-v3/ChangeLog

 2003-09-30  Paolo Carlini  <pcarlini@unitus.it>
 
+	PR libstdc++/12438
+	* include/bits/locale_facets.tcc (locale::combine): Don't
+	leak memory if _M_replace_facet throws.
+	* testsuite/22_locale/locale/cons/12438.cc: New, from the PR.
+
+	* include/bits/locale_classes.h (locale::locale(const locale&,
+	_Facet*)): Tweak, use consistently _M_remove_reference.
+
+2003-09-30  Paolo Carlini  <pcarlini@unitus.it>
+
 	PR libstdc++/12352 (cont)
 	* src/localename.cc (locale::_Impl::_Impl(const char*, size_t)):
 	Don't leak __cloc; don't leak if any of the _M_init_facet(...)

libstdc++-v3/include/bits/locale_classes.h

@@ -393,7 +393,7 @@ namespace std
 	}
       catch(...)
 	{
-	  delete _M_impl;
+	  _M_impl->_M_remove_reference();
 	  for (size_t __j = 0; __j < __i; ++__j)
 	    delete [] _M_tmp_names[__j];	  
 	  __throw_exception_again;

libstdc++-v3/include/bits/locale_facets.tcc

@@ -51,7 +51,15 @@ namespace std
     locale::combine(const locale& __other) const
     {
       _Impl* __tmp = new _Impl(*_M_impl, 1);
-      __tmp->_M_replace_facet(__other._M_impl, &_Facet::id);
+      try
+	{
+	  __tmp->_M_replace_facet(__other._M_impl, &_Facet::id);
+	}
+      catch(...)
+	{
+	  __tmp->_M_remove_reference();
+	  __throw_exception_again;
+	}
       return locale(__tmp);
     }
 

libstdc++-v3/testsuite/22_locale/locale/cons/12438.cc

+// Copyright (C) 2003 Free Software Foundation
+//
+// This file is part of the GNU ISO C++ Library.  This library 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 2, or (at your option)
+// any later version.
+
+// This library 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 library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// 22.1.1.2 locale constructors and destructors [lib.locale.cons]
+
+#include <locale>
+#include <stdexcept>
+#include <cstdlib>
+#include <testsuite_hooks.h>
+
+class MyFacet : public std::locale::facet
+{
+public:
+  static std::locale::id id;
+};
+
+std::locale::id MyFacet::id;
+
+// libstdc++/12438
+void test01(int iters)
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+  
+  for (int i = 0; i < iters; ++i)
+    {
+      try
+	{
+	  locale loc1 = locale::classic();
+	  locale loc2("");
+	  VERIFY( !has_facet<MyFacet>(loc2) );
+	  
+	  loc1.combine<MyFacet>(loc2);
+	  VERIFY( false );
+	}
+      catch (std::runtime_error&)
+	{
+	}
+    }
+}
+
+int main(int argc, char* argv[])
+{
+  // We leaked ~400-500 bytes/iter.
+  __gnu_test::set_memory_limits(2.5);
+  int iters = 10000;
+
+  if (argc > 1)
+    iters = atoi(argv[1]);
+  if (iters < 1)
+    iters = 1;
+  test01(iters);
+
+  return 0;
+}