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Kernel: Make Kernel::VMObject allocation functions return KResultOr

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This makes for nicer handling of errors compared to checking whether a
RefPtr is null. Additionally, this will give way to return different
types of errors in the future.
This commit is contained in:
sin-ack 2021-08-15 09:07:59 +00:00 • committed by Andreas Kling
parent 61c0e3ca92
commit 4bfd6e41b9
26 changed files with 194 additions and 122 deletions
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7
Kernel/Devices/KCOVInstance.cpp
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@ -28,10 +28,11 @@ KResult KCOVInstance::buffer_allocate(size_t buffer_size_in_entries)
// - we allocate one kernel region using that vmobject
// - when an mmap call comes in, we allocate another userspace region,
// backed by the same vmobject
this->vmobject = Memory::AnonymousVMObject::try_create_with_size(
auto maybe_vmobject = Memory::AnonymousVMObject::try_create_with_size(
this->m_buffer_size_in_bytes, AllocationStrategy::AllocateNow);
if (!this->vmobject)
return ENOMEM;
if (maybe_vmobject.is_error())
return maybe_vmobject.error();
this->vmobject = maybe_vmobject.release_value();
this->m_kernel_region = MM.allocate_kernel_region_with_vmobject(
*this->vmobject, this->m_buffer_size_in_bytes, String::formatted("kcov_{}", this->m_pid),