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Guarded allocator: Ensure alignment and size of MemHead #120582

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Sergey Sharybin merged 3 commits from Sergey/blender:guardedalloc_ensure_memhead_alignment into main 2024-04-12 17:22:57 +02:00
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Sergey Sharybin commented 2024-04-12 16:52:00 +02:00
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Ensure that the MemHead and MemHeadAligned are such that memory
allocation followed with the head offset keeps the allocation
aligned to at least MEM_MIN_CPP_ALIGNMENT.

Ensure that the MemHead and MemHeadAligned are such that memory allocation followed with the head offset keeps the allocation aligned to at least MEM_MIN_CPP_ALIGNMENT.
Sergey Sharybin added 1 commit 2024-04-12 16:52:07 +02:00
Guarded allocator: Ensure alignment and size of MmeHead
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5b84fcb760 
Ensure that the MemHead and MemHeadAligned are such that memory
allocation followed with the head offset keeps the allocation
aligned to at least MEM_MIN_CPP_ALIGNMENT.
Sergey Sharybin requested review from Hans Goudey 2024-04-12 16:52:16 +02:00
Sergey Sharybin requested review from Jacques Lucke 2024-04-12 16:52:20 +02:00
Hans Goudey changed title from Guarded allocator: Ensure alignment and size of MmeHead to Guarded allocator: Ensure alignment and size of MemHead 2024-04-12 16:53:12 +02:00
Sergey Sharybin commented 2024-04-12 16:56:42 +02:00
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@blender-bot build

@blender-bot build
Hans Goudey requested changes 2024-04-12 16:57:07 +02:00
intern/guardedalloc/MEM_guardedalloc.h Outdated
@ -258,6 +258,10 @@ void MEM_use_guarded_allocator(void);
# include <type_traits>
# include <utility>
# define MEM_MIN_CPP_ALIGNMENT \
Hans Goudey commented 2024-04-12 16:53:43 +02:00
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There should be a comment describing what this means IMO. That would make the static asserts more meaningful too

There should be a comment describing what this means IMO. That would make the static asserts more meaningful too
Sergey Sharybin commented 2024-04-12 17:03:47 +02:00
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That is a good point. Tried my best to explain what it is.

That is a good point. Tried my best to explain what it is.
Jacques Lucke approved these changes 2024-04-12 16:58:34 +02:00
Sergey Sharybin added 1 commit 2024-04-12 17:03:22 +02:00
Hans Goudey approved these changes 2024-04-12 17:14:40 +02:00
intern/guardedalloc/MEM_guardedalloc.h Outdated
@ -259,2 +259,4 @@
# include <utility>
/* Conservative value of memory alignment returned by non-aligned OS-level memory allocation
* functions. */
Hans Goudey commented 2024-04-12 17:14:13 +02:00
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How about adding For alignments smaller than this value, using non-aligned versions of allocator API functions is okay, allowing use of calloc, for example.

How about adding `For alignments smaller than this value, using non-aligned versions of allocator API functions is okay, allowing use of calloc, for example.`
Sergey Sharybin commented 2024-04-12 17:17:39 +02:00
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Sounds good to me!

Sounds good to me!
Sergey Sharybin added 1 commit 2024-04-12 17:16:50 +02:00
Sergey Sharybin merged commit a4b36cd0d5 into main 2024-04-12 17:22:57 +02:00
Sergey Sharybin deleted branch guardedalloc_ensure_memhead_alignment 2024-04-12 17:22:59 +02:00
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Reference: blender/blender#120582
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