+++ /dev/null
-/* Poison symbols at compile time.
-
- Copyright (C) 2017-2019 Free Software Foundation, Inc.
-
- This file is part of GDB.
-
- This program 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 of the License, or
- (at your option) any later version.
-
- This program 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 program. If not, see <http://www.gnu.org/licenses/>. */
-
-#ifndef COMMON_POISON_H
-#define COMMON_POISON_H
-
-#include "traits.h"
-#include "obstack.h"
-
-/* Poison memset of non-POD types. The idea is catching invalid
- initialization of non-POD structs that is easy to be introduced as
- side effect of refactoring. For example, say this:
-
- struct S { VEC(foo_s) *m_data; };
-
-is converted to this at some point:
-
- struct S {
- S() { m_data.reserve (10); }
- std::vector<foo> m_data;
- };
-
-and old code was initializing S objects like this:
-
- struct S s;
- memset (&s, 0, sizeof (S)); // whoops, now wipes vector.
-
-Declaring memset as deleted for non-POD types makes the memset above
-be a compile-time error. */
-
-/* Helper for SFINAE. True if "T *" is memsettable. I.e., if T is
- either void, or POD. */
-template<typename T>
-struct IsMemsettable
- : gdb::Or<std::is_void<T>,
- std::is_pod<T>>
-{};
-
-template <typename T,
- typename = gdb::Requires<gdb::Not<IsMemsettable<T>>>>
-void *memset (T *s, int c, size_t n) = delete;
-
-#if HAVE_IS_TRIVIALLY_COPYABLE
-
-/* Similarly, poison memcpy and memmove of non trivially-copyable
- types, which is undefined. */
-
-/* True if "T *" is relocatable. I.e., copyable with memcpy/memmove.
- I.e., T is either trivially copyable, or void. */
-template<typename T>
-struct IsRelocatable
- : gdb::Or<std::is_void<T>,
- std::is_trivially_copyable<T>>
-{};
-
-/* True if both source and destination are relocatable. */
-
-template <typename D, typename S>
-using BothAreRelocatable
- = gdb::And<IsRelocatable<D>, IsRelocatable<S>>;
-
-template <typename D, typename S,
- typename = gdb::Requires<gdb::Not<BothAreRelocatable<D, S>>>>
-void *memcpy (D *dest, const S *src, size_t n) = delete;
-
-template <typename D, typename S,
- typename = gdb::Requires<gdb::Not<BothAreRelocatable<D, S>>>>
-void *memmove (D *dest, const S *src, size_t n) = delete;
-
-#endif /* HAVE_IS_TRIVIALLY_COPYABLE */
-
-/* Poison XNEW and friends to catch usages of malloc-style allocations on
- objects that require new/delete. */
-
-template<typename T>
-#if HAVE_IS_TRIVIALLY_CONSTRUCTIBLE
-using IsMallocable = std::is_trivially_constructible<T>;
-#else
-using IsMallocable = std::true_type;
-#endif
-
-template<typename T>
-using IsFreeable = gdb::Or<std::is_trivially_destructible<T>, std::is_void<T>>;
-
-template <typename T, typename = gdb::Requires<gdb::Not<IsFreeable<T>>>>
-void free (T *ptr) = delete;
-
-template<typename T>
-static T *
-xnew ()
-{
- static_assert (IsMallocable<T>::value, "Trying to use XNEW with a non-POD \
-data type. Use operator new instead.");
- return XNEW (T);
-}
-
-#undef XNEW
-#define XNEW(T) xnew<T>()
-
-template<typename T>
-static T *
-xcnew ()
-{
- static_assert (IsMallocable<T>::value, "Trying to use XCNEW with a non-POD \
-data type. Use operator new instead.");
- return XCNEW (T);
-}
-
-#undef XCNEW
-#define XCNEW(T) xcnew<T>()
-
-template<typename T>
-static void
-xdelete (T *p)
-{
- static_assert (IsFreeable<T>::value, "Trying to use XDELETE with a non-POD \
-data type. Use operator delete instead.");
- XDELETE (p);
-}
-
-#undef XDELETE
-#define XDELETE(P) xdelete (P)
-
-template<typename T>
-static T *
-xnewvec (size_t n)
-{
- static_assert (IsMallocable<T>::value, "Trying to use XNEWVEC with a \
-non-POD data type. Use operator new[] (or std::vector) instead.");
- return XNEWVEC (T, n);
-}
-
-#undef XNEWVEC
-#define XNEWVEC(T, N) xnewvec<T> (N)
-
-template<typename T>
-static T *
-xcnewvec (size_t n)
-{
- static_assert (IsMallocable<T>::value, "Trying to use XCNEWVEC with a \
-non-POD data type. Use operator new[] (or std::vector) instead.");
- return XCNEWVEC (T, n);
-}
-
-#undef XCNEWVEC
-#define XCNEWVEC(T, N) xcnewvec<T> (N)
-
-template<typename T>
-static T *
-xresizevec (T *p, size_t n)
-{
- static_assert (IsMallocable<T>::value, "Trying to use XRESIZEVEC with a \
-non-POD data type.");
- return XRESIZEVEC (T, p, n);
-}
-
-#undef XRESIZEVEC
-#define XRESIZEVEC(T, P, N) xresizevec<T> (P, N)
-
-template<typename T>
-static void
-xdeletevec (T *p)
-{
- static_assert (IsFreeable<T>::value, "Trying to use XDELETEVEC with a \
-non-POD data type. Use operator delete[] (or std::vector) instead.");
- XDELETEVEC (p);
-}
-
-#undef XDELETEVEC
-#define XDELETEVEC(P) xdeletevec (P)
-
-template<typename T>
-static T *
-xnewvar (size_t s)
-{
- static_assert (IsMallocable<T>::value, "Trying to use XNEWVAR with a \
-non-POD data type.");
- return XNEWVAR (T, s);;
-}
-
-#undef XNEWVAR
-#define XNEWVAR(T, S) xnewvar<T> (S)
-
-template<typename T>
-static T *
-xcnewvar (size_t s)
-{
- static_assert (IsMallocable<T>::value, "Trying to use XCNEWVAR with a \
-non-POD data type.");
- return XCNEWVAR (T, s);
-}
-
-#undef XCNEWVAR
-#define XCNEWVAR(T, S) xcnewvar<T> (S)
-
-template<typename T>
-static T *
-xresizevar (T *p, size_t s)
-{
- static_assert (IsMallocable<T>::value, "Trying to use XRESIZEVAR with a \
-non-POD data type.");
- return XRESIZEVAR (T, p, s);
-}
-
-#undef XRESIZEVAR
-#define XRESIZEVAR(T, P, S) xresizevar<T> (P, S)
-
-template<typename T>
-static T *
-xobnew (obstack *ob)
-{
- static_assert (IsMallocable<T>::value, "Trying to use XOBNEW with a \
-non-POD data type.");
- return XOBNEW (ob, T);
-}
-
-#undef XOBNEW
-#define XOBNEW(O, T) xobnew<T> (O)
-
-template<typename T>
-static T *
-xobnewvec (obstack *ob, size_t n)
-{
- static_assert (IsMallocable<T>::value, "Trying to use XOBNEWVEC with a \
-non-POD data type.");
- return XOBNEWVEC (ob, T, n);
-}
-
-#undef XOBNEWVEC
-#define XOBNEWVEC(O, T, N) xobnewvec<T> (O, N)
-
-#endif /* COMMON_POISON_H */
projects / thirdparty / binutils-gdb.git / blobdiff