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Kernel: Make ContiguousVMObject factory API OOM safe

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Brian Gianforcaro 2021-05-28 03:56:42 -07:00 • committed by Andreas Kling
parent cb45b2c001
commit 864b1a65e3
3 changed files with 17 additions and 11 deletions
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16
Kernel/VM/ContiguousVMObject.cpp
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@ -10,15 +10,17 @@
namespace Kernel {
NonnullRefPtr<ContiguousVMObject> ContiguousVMObject::create_with_size(size_t size, size_t physical_alignment)
{
return adopt_ref(*new ContiguousVMObject(size, physical_alignment));
}
ContiguousVMObject::ContiguousVMObject(size_t size, size_t physical_alignment)
: VMObject(size)
RefPtr<ContiguousVMObject> ContiguousVMObject::create_with_size(size_t size, size_t physical_alignment)
{
auto contiguous_physical_pages = MM.allocate_contiguous_supervisor_physical_pages(size, physical_alignment);
if (contiguous_physical_pages.is_empty())
return {};
return adopt_ref_if_nonnull(new ContiguousVMObject(size, contiguous_physical_pages));
}
ContiguousVMObject::ContiguousVMObject(size_t size, NonnullRefPtrVector<PhysicalPage>& contiguous_physical_pages)
: VMObject(size)
{
for (size_t i = 0; i < page_count(); i++) {
physical_pages()[i] = contiguous_physical_pages[i];
dbgln_if(CONTIGUOUS_VMOBJECT_DEBUG, "Contiguous page[{}]: {}", i, physical_pages()[i]->paddr());