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Kernel: Make Region::try_create_user_accessible() OOM-safe

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Previously we would simply assume that Region allocation always
succeeded. There is still one such assumption when splitting user
regions inside a Space. That will be dealt with in a separate commit.
This commit is contained in:
Andreas Kling 2021-07-11 18:07:12 +02:00
parent 241bbce264
commit cac557eee0
3 changed files with 33 additions and 14 deletions
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2
Kernel/VM/Region.h
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@ -49,7 +49,7 @@ public:
Yes,
};
static NonnullOwnPtr<Region> create_user_accessible(Process*, const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, OwnPtr<KString> name, Region::Access access, Cacheable, bool shared);
static OwnPtr<Region> try_create_user_accessible(Process*, const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, OwnPtr<KString> name, Region::Access access, Cacheable, bool shared);
static OwnPtr<Region> create_kernel_only(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, OwnPtr<KString> name, Region::Access access, Cacheable = Cacheable::Yes);
~Region();