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Kernel: Make Region splitting OOM-safe

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Region allocation failures during splitting are now propagated all the
way out to where we can return ENOMEM for them.
This commit is contained in:
Andreas Kling 2021-07-11 18:51:54 +02:00
parent cac557eee0
commit cd7a49b90d
3 changed files with 40 additions and 16 deletions
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4
Kernel/VM/Space.h
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@ -42,8 +42,8 @@ public:
bool deallocate_region(Region& region);
OwnPtr<Region> take_region(Region& region);
Region& allocate_split_region(const Region& source_region, const Range&, size_t offset_in_vmobject);
Vector<Region*, 2> split_region_around_range(const Region& source_region, const Range&);
KResultOr<Region*> try_allocate_split_region(Region const& source_region, Range const&, size_t offset_in_vmobject);
KResultOr<Vector<Region*, 2>> try_split_region_around_range(Region const& source_region, Range const&);
Region* find_region_from_range(const Range&);
Region* find_region_containing(const Range&);