mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
4a94e36819
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
249 lines
6.0 KiB
C++
249 lines
6.0 KiB
C++
/* Poison symbols at compile time.
|
|
|
|
Copyright (C) 2017-2022 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 */
|