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https://github.com/SerenityOS/serenity
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d67c6a92db
After the page fault handler has found the region in which the fault occurred, do the rest of the work in the region itself. This patch also makes all fault types consistently crash the process if a new page is needed but we're all out of pages.
53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
#pragma once
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#include <AK/FixedArray.h>
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#include <AK/InlineLinkedList.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/Weakable.h>
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#include <Kernel/Lock.h>
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class Inode;
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class PhysicalPage;
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class VMObject : public RefCounted<VMObject>
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, public Weakable<VMObject>
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, public InlineLinkedListNode<VMObject> {
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friend class MemoryManager;
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friend class Region;
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public:
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virtual ~VMObject();
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virtual NonnullRefPtr<VMObject> clone() = 0;
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virtual bool is_anonymous() const { return false; }
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virtual bool is_inode() const { return false; }
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size_t page_count() const { return m_physical_pages.size(); }
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const FixedArray<RefPtr<PhysicalPage>>& physical_pages() const { return m_physical_pages; }
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FixedArray<RefPtr<PhysicalPage>>& physical_pages() { return m_physical_pages; }
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size_t size() const { return m_physical_pages.size() * PAGE_SIZE; }
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// For InlineLinkedListNode
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VMObject* m_next { nullptr };
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VMObject* m_prev { nullptr };
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protected:
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explicit VMObject(size_t);
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explicit VMObject(const VMObject&);
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template<typename Callback>
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void for_each_region(Callback);
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FixedArray<RefPtr<PhysicalPage>> m_physical_pages;
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private:
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VMObject& operator=(const VMObject&) = delete;
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VMObject& operator=(VMObject&&) = delete;
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VMObject(VMObject&&) = delete;
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Lock m_paging_lock { "VMObject" };
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};
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