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f86e6f8eb0
The STL says that these should be replaceable by user code. new.cc now defines only a few direct functions (including a free wrapper that perplexingly is needed since g++ didn’t want to alias "free".) Now, all of the operators are weak references to those functions.
99 lines
3.4 KiB
C++
99 lines
3.4 KiB
C++
// -*- mode:c++; indent-tabs-mode:nil; c-basic-offset:4; coding:utf-8 -*-
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// vi: set et ft=cpp ts=4 sts=4 sw=4 fenc=utf-8 :vi
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//
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// Copyright 2024 Justine Alexandra Roberts Tunney
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//
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// Permission to use, copy, modify, and/or distribute this software for
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// any purpose with or without fee is hereby granted, provided that the
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// above copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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// WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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// AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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// DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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// PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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// TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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#include "new.h"
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#include "libc/mem/mem.h"
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COSMOPOLITAN_C_START_
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static void*
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_ctl_alloc(size_t n, size_t a)
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{
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void* p;
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if (!(p = memalign(a, n)))
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__builtin_trap();
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return p;
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}
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static void*
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_ctl_alloc1(size_t n)
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{
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return _ctl_alloc(n, 1);
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}
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static void*
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_ctl_ret(size_t, void* p)
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{
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return p;
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}
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static void
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_ctl_free(void* p)
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{
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free(p);
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}
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static void
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_ctl_nop(void*, void*)
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{
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}
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COSMOPOLITAN_C_END_
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#undef __weak_reference
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#define __weak_reference(P, A) P __attribute__((weak, alias(#A)))
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/* The ISO says that these should be replaceable by user code. It also says
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that the declarations for the first four (i.e. non placement-) operators
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new are implicitly available in each translation unit, including the std
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align_val_t parameter. (?) However, <new> also _defines_ the align_val_t
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type so you can’t just write your own. Our way through this morass is to
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supply ours as ctl::align_val_t and not implicitly declare anything, for
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now. If you have any brain cells left after reading this comment then go
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look at the eight operator delete weak references to free in the below. */
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__weak_reference(void* operator new(size_t, ctl::align_val_t), _ctl_alloc);
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__weak_reference(void* operator new[](size_t, ctl::align_val_t), _ctl_alloc);
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__weak_reference(void* operator new(size_t), _ctl_alloc1);
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__weak_reference(void* operator new[](size_t), _ctl_alloc1);
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// XXX clang-format currently mutilates these for some reason.
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// clang-format off
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__weak_reference(void* operator new(size_t, void*), _ctl_ret);
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__weak_reference(void* operator new[](size_t, void*), _ctl_ret);
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__weak_reference(void operator delete(void*) noexcept, _ctl_free);
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__weak_reference(void operator delete[](void*) noexcept, _ctl_free);
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wattribute-alias="
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__weak_reference(void operator delete(void*, ctl::align_val_t) noexcept,
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_ctl_free);
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__weak_reference(void operator delete[](void*, ctl::align_val_t) noexcept,
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_ctl_free);
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__weak_reference(void operator delete(void*, size_t) noexcept, _ctl_free);
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__weak_reference(void operator delete[](void*, size_t) noexcept, _ctl_free);
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__weak_reference(void operator delete(void*, size_t, ctl::align_val_t) noexcept,
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_ctl_free);
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__weak_reference(void operator delete[](void*, size_t, ctl::align_val_t)
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noexcept, _ctl_free);
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#pragma GCC diagnostic pop
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__weak_reference(void operator delete(void*, void*) noexcept, _ctl_nop);
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__weak_reference(void operator delete[](void*, void*) noexcept, _ctl_nop);
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