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Fix unsafe moves inside loops

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PR libstdc++/67085
	* include/bits/stl_heap.h (__is_heap): Use _GLIBCXX_MOVE.
	(__make_heap, __sort_heap): Don't use _GLIBCXX_MOVE inside loops.
	* testsuite/23_containers/priority_queue/67085.cc: Adjust expected
	number of copies.
	* testsuite/25_algorithms/make_heap/movable.cc: New test.

From-SVN: r244650
This commit is contained in:
Jonathan Wakely 2017-01-19 20:29:07 +00:00 committed by Jonathan Wakely
parent ab014eb3ae
commit 9ade9945a0
4 changed files with 53 additions and 5 deletions
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7
libstdc++-v3/ChangeLog
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@ -1,5 +1,12 @@
2017-01-19 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/67085
* include/bits/stl_heap.h (__is_heap): Use _GLIBCXX_MOVE.
(__make_heap, __sort_heap): Don't use _GLIBCXX_MOVE inside loops.
* testsuite/23_containers/priority_queue/67085.cc: Adjust expected
number of copies.
* testsuite/25_algorithms/make_heap/movable.cc: New test.
PR libstdc++/67085
* include/bits/stl_heap.h (push_heap, __adjust_heap, __pop_heap)
(pop_heap, __make_heap, make_heap, __sort_heap, sort_heap): Use

9
libstdc++-v3/include/bits/stl_heap.h
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@ -113,7 +113,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
inline bool
__is_heap(_RandomAccessIterator __first, _RandomAccessIterator __last,
_Compare __comp)
{ return std::__is_heap(__first, __comp, std::distance(__first, __last)); }
{
return std::__is_heap(__first, _GLIBCXX_MOVE(__comp),
std::distance(__first, __last));
}
// Heap-manipulation functions: push_heap, pop_heap, make_heap, sort_heap,
// + is_heap and is_heap_until in C++0x.
@ -336,7 +339,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
_ValueType __value = _GLIBCXX_MOVE(*(__first + __parent));
std::__adjust_heap(__first, __parent, __len, _GLIBCXX_MOVE(__value),
_GLIBCXX_MOVE(__comp));
__comp);
if (__parent == 0)
return;
__parent--;
@ -401,7 +404,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
while (__last - __first > 1)
{
--__last;
std::__pop_heap(__first, __last, __last, _GLIBCXX_MOVE(__comp));
std::__pop_heap(__first, __last, __last, __comp);
}
}

4
libstdc++-v3/testsuite/23_containers/priority_queue/67085.cc
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@ -34,9 +34,9 @@ test01()
{
int v[] = {1, 2, 3, 4};
std::priority_queue<int, std::vector<int>, CopyCounter> q{v, v+4};
VERIFY(count == 2);
VERIFY(count == 4);
q.push(1);
VERIFY(count == 3);
VERIFY(count == 5);
}
int

38
libstdc++-v3/testsuite/25_algorithms/make_heap/movable.cc Normal file
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@ -0,0 +1,38 @@
// Copyright (C) 2017 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 { target c++11 } }
#include <functional>
#include <algorithm>
#include <iterator>
void
test01()
{
int i[] = { 1, 2, 3, 4 };
std::function<bool(int, int)> f = std::less<>{};
// If this uses a moved-from std::function we'll get an exception:
std::make_heap(std::begin(i), std::end(i), f);
std::sort_heap(std::begin(i), std::end(i), f);
}
int
main()
{
test01();
}