Cheri-research/snmalloc
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Move link out of object space.

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The link object was previously stored in a disused object.  This is
good for reducing meta-data, but if we want to reduce the meta-data
corruption potential, then this is not a good design choice.

This commit moves it into the Metaslab.
This commit is contained in:
Matthew Parkinson
2021-03-12 21:11:43 +00:00
committed by Matthew Parkinson
parent e7dce55f19
commit 59edf294d0
5 changed files with 75 additions and 107 deletions
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6
src/mem/superslab.h
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@@ -173,8 +173,7 @@ namespace snmalloc
meta[0].allocated = static_cast<uint16_t>(
(SLAB_SIZE - get_initial_offset(sizeclass, true)) /
sizeclass_to_size(sizeclass));
meta[0].link = 1;
meta[0].needed = 1;
meta[0].set_full();
meta[0].sizeclass = static_cast<uint8_t>(sizeclass);
used++;
@@ -198,8 +197,7 @@ namespace snmalloc
meta[h].allocated = static_cast<uint16_t>(
(SLAB_SIZE - get_initial_offset(sizeclass, false)) /
sizeclass_to_size(sizeclass));
meta[h].needed = 1;
meta[h].link = 1;
meta[h].set_full();
meta[h].sizeclass = static_cast<uint8_t>(sizeclass);
head = h + n + 1;