From: Jonathan Wakely Date: Wed, 13 Sep 2017 07:27:40 +0000 (+0100) Subject: Define std::__to_address helper X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2af96386a67a2224abc74e7c2144747240ac4ad5;p=gcc.git Define std::__to_address helper * include/bits/allocated_ptr.h (__allocated_ptr::get): Use __to_address. (__allocated_ptr::_S_raw_ptr): Remove. * include/bits/forward_list.h (_Fwd_list_base::_M_get_node): Use __to_address. * include/bits/hashtable_policy.h (_Hashtable_alloc): Likewise. * include/bits/ptr_traits.h (__to_address): Define new function template. * include/bits/shared_ptr_base.h (__shared_ptr): Use __to_address. (__shared_ptr::_S_raw_ptr): Remove. * include/bits/stl_vector.h [__cplusplus >= 201103L] (vector::_M_data_ptr): Use __to_address. [__cplusplus < 201103L] (vector::_M_data_ptr): Don't dereference possibly invalid pointers. * include/ext/alloc_traits.h (__alloc_traits::construct) (__alloc_traits::destroy): Use __to_address. From-SVN: r252055 --- diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 2948c637514..76ab00f9c8d 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,3 +1,22 @@ +2017-09-13 Jonathan Wakely + + * include/bits/allocated_ptr.h (__allocated_ptr::get): Use + __to_address. + (__allocated_ptr::_S_raw_ptr): Remove. + * include/bits/forward_list.h (_Fwd_list_base::_M_get_node): Use + __to_address. + * include/bits/hashtable_policy.h (_Hashtable_alloc): Likewise. + * include/bits/ptr_traits.h (__to_address): Define new function + template. + * include/bits/shared_ptr_base.h (__shared_ptr): Use __to_address. + (__shared_ptr::_S_raw_ptr): Remove. + * include/bits/stl_vector.h [__cplusplus >= 201103L] + (vector::_M_data_ptr): Use __to_address. + [__cplusplus < 201103L] (vector::_M_data_ptr): Don't dereference + possibly invalid pointers. + * include/ext/alloc_traits.h (__alloc_traits::construct) + (__alloc_traits::destroy): Use __to_address. + 2017-09-12 Jonathan Wakely PR libstdc++/79433 diff --git a/libstdc++-v3/include/bits/allocated_ptr.h b/libstdc++-v3/include/bits/allocated_ptr.h index 773b3f500f0..96d7841b65b 100644 --- a/libstdc++-v3/include/bits/allocated_ptr.h +++ b/libstdc++-v3/include/bits/allocated_ptr.h @@ -82,16 +82,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION } /// Get the address that the owned pointer refers to. - value_type* get() { return _S_raw_ptr(_M_ptr); } + value_type* get() { return std::__to_address(_M_ptr); } private: - static value_type* _S_raw_ptr(value_type* __ptr) { return __ptr; } - - template - static auto - _S_raw_ptr(_Ptr __ptr) -> decltype(_S_raw_ptr(__ptr.operator->())) - { return _S_raw_ptr(__ptr.operator->()); } - _Alloc* _M_alloc; pointer _M_ptr; }; diff --git a/libstdc++-v3/include/bits/forward_list.h b/libstdc++-v3/include/bits/forward_list.h index 9d86fcc1568..855a72815ae 100644 --- a/libstdc++-v3/include/bits/forward_list.h +++ b/libstdc++-v3/include/bits/forward_list.h @@ -336,7 +336,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER _M_get_node() { auto __ptr = _Node_alloc_traits::allocate(_M_get_Node_allocator(), 1); - return std::__addressof(*__ptr); + return std::__to_address(__ptr); } template diff --git a/libstdc++-v3/include/bits/hashtable_policy.h b/libstdc++-v3/include/bits/hashtable_policy.h index 5f2d8776aaa..da6d49c96c4 100644 --- a/libstdc++-v3/include/bits/hashtable_policy.h +++ b/libstdc++-v3/include/bits/hashtable_policy.h @@ -2048,7 +2048,7 @@ namespace __detail _Hashtable_alloc<_NodeAlloc>::_M_allocate_node(_Args&&... __args) { auto __nptr = __node_alloc_traits::allocate(_M_node_allocator(), 1); - __node_type* __n = std::__addressof(*__nptr); + __node_type* __n = std::__to_address(__nptr); __try { ::new ((void*)__n) __node_type; @@ -2094,7 +2094,7 @@ namespace __detail __bucket_alloc_type __alloc(_M_node_allocator()); auto __ptr = __bucket_alloc_traits::allocate(__alloc, __n); - __bucket_type* __p = std::__addressof(*__ptr); + __bucket_type* __p = std::__to_address(__ptr); __builtin_memset(__p, 0, __n * sizeof(__bucket_type)); return __p; } diff --git a/libstdc++-v3/include/bits/ptr_traits.h b/libstdc++-v3/include/bits/ptr_traits.h index 797e7fcec39..74d4c18126c 100644 --- a/libstdc++-v3/include/bits/ptr_traits.h +++ b/libstdc++-v3/include/bits/ptr_traits.h @@ -146,6 +146,16 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template using __ptr_rebind = typename pointer_traits<_Ptr>::template rebind<_Tp>; + template + constexpr _Tp* + __to_address(_Tp* __ptr) noexcept + { return __ptr; } + + template + constexpr typename std::pointer_traits<_Ptr>::element_type* + __to_address(const _Ptr& __ptr) + { return std::__to_address(__ptr.operator->()); } + _GLIBCXX_END_NAMESPACE_VERSION } // namespace std diff --git a/libstdc++-v3/include/bits/shared_ptr_base.h b/libstdc++-v3/include/bits/shared_ptr_base.h index 7e6766ba7d5..20504f326e8 100644 --- a/libstdc++-v3/include/bits/shared_ptr_base.h +++ b/libstdc++-v3/include/bits/shared_ptr_base.h @@ -1185,7 +1185,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION __shared_ptr(unique_ptr<_Yp, _Del>&& __r) : _M_ptr(__r.get()), _M_refcount() { - auto __raw = _S_raw_ptr(__r.get()); + auto __raw = __to_address(__r.get()); _M_refcount = __shared_count<_Lp>(std::move(__r)); _M_enable_shared_from_this_with(__raw); } @@ -1201,7 +1201,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION __shared_ptr(unique_ptr<_Tp1, _Del>&& __r, __sp_array_delete) : _M_ptr(__r.get()), _M_refcount() { - auto __raw = _S_raw_ptr(__r.get()); + auto __raw = __to_address(__r.get()); _M_refcount = __shared_count<_Lp>(std::move(__r)); _M_enable_shared_from_this_with(__raw); } @@ -1386,16 +1386,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION _M_get_deleter(const std::type_info& __ti) const noexcept { return _M_refcount._M_get_deleter(__ti); } - template - static _Tp1* - _S_raw_ptr(_Tp1* __ptr) - { return __ptr; } - - template - static auto - _S_raw_ptr(_Tp1 __ptr) -> decltype(std::__addressof(*__ptr)) - { return std::__addressof(*__ptr); } - template friend class __shared_ptr; template friend class __weak_ptr; diff --git a/libstdc++-v3/include/bits/stl_vector.h b/libstdc++-v3/include/bits/stl_vector.h index 69cb8030208..c7634216c01 100644 --- a/libstdc++-v3/include/bits/stl_vector.h +++ b/libstdc++-v3/include/bits/stl_vector.h @@ -1695,7 +1695,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER template typename std::pointer_traits<_Ptr>::element_type* _M_data_ptr(_Ptr __ptr) const - { return empty() ? nullptr : std::__addressof(*__ptr); } + { return empty() ? nullptr : std::__to_address(__ptr); } #else template _Up* @@ -1705,12 +1705,12 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER template value_type* _M_data_ptr(_Ptr __ptr) - { return __ptr.operator->(); } + { return empty() ? (value_type*)0 : __ptr.operator->(); } template const value_type* _M_data_ptr(_Ptr __ptr) const - { return __ptr.operator->(); } + { return empty() ? (const value_type*)0 : __ptr.operator->(); } #endif }; diff --git a/libstdc++-v3/include/ext/alloc_traits.h b/libstdc++-v3/include/ext/alloc_traits.h index fe5655100a4..c6f44950007 100644 --- a/libstdc++-v3/include/ext/alloc_traits.h +++ b/libstdc++-v3/include/ext/alloc_traits.h @@ -81,7 +81,7 @@ template static typename std::enable_if<__is_custom_pointer<_Ptr>::value>::type construct(_Alloc& __a, _Ptr __p, _Args&&... __args) { - _Base_type::construct(__a, std::addressof(*__p), + _Base_type::construct(__a, std::__to_address(__p), std::forward<_Args>(__args)...); } @@ -89,7 +89,7 @@ template template static typename std::enable_if<__is_custom_pointer<_Ptr>::value>::type destroy(_Alloc& __a, _Ptr __p) - { _Base_type::destroy(__a, std::addressof(*__p)); } + { _Base_type::destroy(__a, std::__to_address(__p)); } static _Alloc _S_select_on_copy(const _Alloc& __a) { return _Base_type::select_on_container_copy_construction(__a); }