PR libstdc++/86292 fix exception safety of std::vector<InputIterator> constructor

Backport from mainline
2018-06-25  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/86292
	* include/bits/stl_vector.h (vector::_M_range_initialize<InputIter>):
	Add try-catch block.
	* testsuite/23_containers/vector/cons/86292.cc: New.

From-SVN: r263379

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index dcf4f50ec2df5663670c335e818b0060e5557c12..ef35187b3622a19d374c94e5750b83564e457efc 100644 (file)
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,13 @@
 2018-08-07  Jonathan Wakely  <jwakely@redhat.com>
 
+       Backport from mainline
+       2018-06-25  Jonathan Wakely  <jwakely@redhat.com>
+
+       PR libstdc++/86292
+       * include/bits/stl_vector.h (vector::_M_range_initialize<InputIter>):
+       Add try-catch block.
+       * testsuite/23_containers/vector/cons/86292.cc: New.
+
        Backport from mainline
        2018-07-31  Jonathan Wakely  <jwakely@redhat.com>
 

diff --git a/libstdc++-v3/include/bits/stl_vector.h b/libstdc++-v3/include/bits/stl_vector.h
index fb882126cf984f69b8b927a4a4bf0ff0dcc798fa..eac04655a38c5980a2f50dffca4e9cae342780e9 100644 (file)
--- a/libstdc++-v3/include/bits/stl_vector.h
+++ b/libstdc++-v3/include/bits/stl_vector.h
@@ -1302,22 +1302,27 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
       // Called by the second initialize_dispatch above
       template<typename _InputIterator>
        void
-       _M_range_initialize(_InputIterator __first,
-                           _InputIterator __last, std::input_iterator_tag)
+       _M_range_initialize(_InputIterator __first, _InputIterator __last,
+                           std::input_iterator_tag)
        {
-         for (; __first != __last; ++__first)
+         __try {
+           for (; __first != __last; ++__first)
 #if __cplusplus >= 201103L
-           emplace_back(*__first);
+             emplace_back(*__first);
 #else
-           push_back(*__first);
+             push_back(*__first);
 #endif
+         } __catch(...) {
+           clear();
+           __throw_exception_again;
+         }
        }
 
       // Called by the second initialize_dispatch above
       template<typename _ForwardIterator>
        void
-       _M_range_initialize(_ForwardIterator __first,
-                           _ForwardIterator __last, std::forward_iterator_tag)
+       _M_range_initialize(_ForwardIterator __first, _ForwardIterator __last,
+                           std::forward_iterator_tag)
        {
          const size_type __n = std::distance(__first, __last);
          this->_M_impl._M_start = this->_M_allocate(__n);

diff --git a/libstdc++-v3/testsuite/23_containers/vector/cons/86292.cc b/libstdc++-v3/testsuite/23_containers/vector/cons/86292.cc
new file mode 100644 (file)
index 0000000..7103efb
--- /dev/null
+++ b/libstdc++-v3/testsuite/23_containers/vector/cons/86292.cc
@@ -0,0 +1,64 @@
+// Copyright (C) 2018 Free Software Foundation, Inc.
+//
+// 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 3, 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 COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// { dg-do run }
+
+#include <vector>
+#include <testsuite_hooks.h>
+#include <testsuite_iterators.h>
+
+struct X
+{
+  X() { ++count; }
+  X(const X&) { if (++copies >= max_copies) throw 1; ++count; }
+  ~X() { --count; }
+
+  static int count;
+  static int copies;
+  static int max_copies;
+};
+
+int X::count = 0;
+int X::copies = 0;
+int X::max_copies = 0;
+
+void
+test01()
+{
+  X x[3];
+  const int count = X::count;
+  X::max_copies = 2;
+  __gnu_test::test_container<const X, __gnu_test::input_iterator_wrapper>
+    x_input(x, x+3);
+  bool caught = false;
+  try
+  {
+    std::vector<X> v(x_input.begin(), x_input.end());
+  }
+  catch(int)
+  {
+    caught = true;
+  }
+  VERIFY( caught );
+  VERIFY( X::count == count );
+}
+
+int
+main()
+{
+  test01();
+}