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authorJonathan Wakely <jwakely@redhat.com>2019-01-29 00:47:25 +0000
committerJonathan Wakely <redi@gcc.gnu.org>2019-01-29 00:47:25 +0000
commit1f48525ded40b968792c4dfd9a7614c3e88129a4 (patch)
treefc2d3d9bb79c9d94adc789855952b43be97fb435 /libstdc++-v3
parenta097ba8abb6ca31638a5ad3f1f49a21c1b772839 (diff)
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Ensure pool resources always use normal mode vector
The __pool_resource::_M_unpooled member was declared with type std::vector, which means that the type depends on whether debug mode is active or not. Because the non-inline definitions in src/c++17/memory_resource.cc are never compiled with debug mode, the type declared in the header doesn't match the type in the library definitions, leading to undefined behaviour. The solution is to ensure the header always uses the non-debug vector, even when debug mode is active. To make this easier a new alias template is defined: _GLIBCXX_STD_C::pmr::vector. * include/std/memory_resource (__pool_resource::_M_unpooled): Use normal mode vector, even for debug mode. * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector): Define alias template for normal mode vector. From-SVN: r268354
Diffstat (limited to 'libstdc++-v3')
-rw-r--r--libstdc++-v3/ChangeLog7
-rw-r--r--libstdc++-v3/include/std/memory_resource2
-rw-r--r--libstdc++-v3/include/std/vector7
3 files changed, 15 insertions, 1 deletions
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 89b94a8..3003852 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2019-01-29 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/std/memory_resource (__pool_resource::_M_unpooled): Use
+ normal mode vector, even for debug mode.
+ * include/std/vector [_GLIBCXX_DEBUG] (_GLIBCXX_STD_C::pmr::vector):
+ Define alias template for normal mode vector.
+
2019-01-28 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/68737
diff --git a/libstdc++-v3/include/std/memory_resource b/libstdc++-v3/include/std/memory_resource
index 5573494..93b2ebd 100644
--- a/libstdc++-v3/include/std/memory_resource
+++ b/libstdc++-v3/include/std/memory_resource
@@ -354,7 +354,7 @@ namespace pmr
struct _BigBlock;
// Collection of blocks too big for any pool, sorted by address.
// This also stores the only copy of the upstream memory resource pointer.
- pmr::vector<_BigBlock> _M_unpooled;
+ _GLIBCXX_STD_C::pmr::vector<_BigBlock> _M_unpooled;
const int _M_npools;
};
diff --git a/libstdc++-v3/include/std/vector b/libstdc++-v3/include/std/vector
index 2c90765..e5e13ab 100644
--- a/libstdc++-v3/include/std/vector
+++ b/libstdc++-v3/include/std/vector
@@ -89,6 +89,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Tp>
using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
} // namespace pmr
+# ifdef _GLIBCXX_DEBUG
+ namespace _GLIBCXX_STD_C::pmr {
+ template<typename _Tp>
+ using vector
+ = _GLIBCXX_STD_C::vector<_Tp, std::pmr::polymorphic_allocator<_Tp>>;
+ } // namespace _GLIBCXX_STD_C::pmr
+# endif
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // C++17