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Kernel: Make Process::allocate_region*() return KResultOr<Region*>

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This allows region allocation to return specific errors and we don't
have to assume every failure is an ENOMEM.
This commit is contained in:
Andreas Kling 2021-01-15 17:27:52 +01:00
parent 7899e14e72
commit 64b0d89335
10 changed files with 70 additions and 79 deletions
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8
Kernel/Process.h
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@ -442,10 +442,10 @@ public:
return m_euid == 0;
}
Region* allocate_region_with_vmobject(VirtualAddress, size_t, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot, bool shared);
Region* allocate_region(VirtualAddress, size_t, const String& name, int prot = PROT_READ | PROT_WRITE, AllocationStrategy strategy = AllocationStrategy::Reserve);
Region* allocate_region_with_vmobject(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot, bool shared);
Region* allocate_region(const Range&, const String& name, int prot = PROT_READ | PROT_WRITE, AllocationStrategy strategy = AllocationStrategy::Reserve);
KResultOr<Region*> allocate_region_with_vmobject(VirtualAddress, size_t, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot, bool shared);
KResultOr<Region*> allocate_region(VirtualAddress, size_t, const String& name, int prot = PROT_READ | PROT_WRITE, AllocationStrategy strategy = AllocationStrategy::Reserve);
KResultOr<Region*> allocate_region_with_vmobject(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot, bool shared);
KResultOr<Region*> allocate_region(const Range&, const String& name, int prot = PROT_READ | PROT_WRITE, AllocationStrategy strategy = AllocationStrategy::Reserve);
bool deallocate_region(Region& region);
Region& allocate_split_region(const Region& source_region, const Range&, size_t offset_in_vmobject);