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San: Implement bump alloc

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The new allocator will be used to allocate guarded extents used as slabs
for guarded small allocations.
This commit is contained in:
Alex Lapenkou
2021-11-04 11:10:19 -07:00
committed by Alexander Lapenkov
parent 34b00f8969
commit 0f6da1257d
15 changed files with 521 additions and 107 deletions
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2
test/unit/san.c
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@@ -122,7 +122,7 @@ TEST_BEGIN(test_guarded_decay) {
/* Verify that guarded extents as dirty. */
size_t sz1 = PAGE, sz2 = PAGE * 2;
/* W/o maps_coalesce, guarded extents are unguarded eagerly. */
size_t add_guard_size = maps_coalesce ? 0 : PAGE_GUARDS_SIZE;
size_t add_guard_size = maps_coalesce ? 0 : SAN_PAGE_GUARDS_SIZE;
generate_dirty(arena_ind, sz1);
verify_pdirty(arena_ind, sz1 + add_guard_size);
verify_pmuzzy(arena_ind, 0);