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8ae3c09dc0
The 'arena' allocator does not take memory alignment into account, which can result in crashes at -O3 with gcc 7.5 (presumably because of SSE instructions). This accounts for alignment issues, fixing the issue. Also do various cleanup in lib/allocators. Reported by: Bellaz89, Freagarach Comments by: vladislavbelov Differential Revision: https://code.wildfiregames.com/D3181 This was SVN commit r24517.
90 lines
2.5 KiB
C++
90 lines
2.5 KiB
C++
/* Copyright (C) 2021 Wildfire Games.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef INCLUDED_STATELESS_ALLOCATORS
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#define INCLUDED_STATELESS_ALLOCATORS
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#include "lib/sysdep/rtl.h"
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#include "lib/sysdep/vm.h"
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#include <memory>
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// NB: STL allocators are parameterized on the object type and indicate
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// the number of elements to [de]allocate. however, these adapters are
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// only used for allocating storage and receive the number of bytes.
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struct Allocator_Heap
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{
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void* allocate(size_t size)
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{
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return malloc(size);
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}
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void deallocate(void* p, size_t UNUSED(size))
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{
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return free(p);
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}
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};
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template<size_t alignment = allocationAlignment>
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struct Allocator_Aligned
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{
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void* allocate(size_t size)
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{
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return rtl_AllocateAligned(size, alignment);
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}
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void deallocate(void* p, size_t UNUSED(size))
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{
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return rtl_FreeAligned(p);
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}
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};
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template<vm::PageType pageType = vm::kDefault, int prot = PROT_READ|PROT_WRITE>
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struct Allocator_VM
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{
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void* allocate(size_t size)
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{
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return vm::Allocate(size, pageType, prot);
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}
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void deallocate(void* p, size_t size)
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{
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vm::Free(p, size);
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}
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};
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template<size_t commitSize = g_LargePageSize, vm::PageType pageType = vm::kDefault, int prot = PROT_READ|PROT_WRITE>
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struct Allocator_AddressSpace
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{
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void* allocate(size_t size)
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{
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return vm::ReserveAddressSpace(size, commitSize, pageType, prot);
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}
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void deallocate(void* p, size_t size)
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{
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vm::ReleaseAddressSpace(p, size);
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}
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};
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#endif // INCLUDED_STATELESS_ALLOCATORS
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