jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
3 * Copyright (c) 2021, Leon Albrecht <leon2002.la@gmail.com>
4 *
5 * SPDX-License-Identifier: BSD-2-Clause
6 */
7
8#pragma once
9
10#include <AK/RedBlackTree.h>
11#include <AK/Vector.h>
12#include <Kernel/Arch/PageDirectory.h>
13#include <Kernel/Library/LockWeakPtr.h>
14#include <Kernel/Locking/SpinlockProtected.h>
15#include <Kernel/Memory/AllocationStrategy.h>
16#include <Kernel/Memory/Region.h>
17#include <Kernel/Memory/RegionTree.h>
18#include <Kernel/UnixTypes.h>
19
20namespace Kernel::Memory {
21
22class AddressSpace {
23public:
24 static ErrorOr<NonnullOwnPtr<AddressSpace>> try_create(AddressSpace const* parent);
25 ~AddressSpace();
26
27 PageDirectory& page_directory() { return *m_page_directory; }
28 PageDirectory const& page_directory() const { return *m_page_directory; }
29
30 RegionTree& region_tree() { return m_region_tree; }
31 RegionTree const& region_tree() const { return m_region_tree; }
32
33 void dump_regions();
34
35 ErrorOr<void> unmap_mmap_range(VirtualAddress, size_t);
36
37 ErrorOr<Region*> allocate_region_with_vmobject(VirtualRange requested_range, NonnullLockRefPtr<VMObject>, size_t offset_in_vmobject, StringView name, int prot, bool shared);
38 ErrorOr<Region*> allocate_region_with_vmobject(RandomizeVirtualAddress, VirtualAddress requested_address, size_t requested_size, size_t requested_alignment, NonnullLockRefPtr<VMObject>, size_t offset_in_vmobject, StringView name, int prot, bool shared);
39 ErrorOr<Region*> allocate_region(RandomizeVirtualAddress, VirtualAddress requested_address, size_t requested_size, size_t requested_alignment, StringView name, int prot = PROT_READ | PROT_WRITE, AllocationStrategy strategy = AllocationStrategy::Reserve);
40 void deallocate_region(Region& region);
41 NonnullOwnPtr<Region> take_region(Region& region);
42
43 ErrorOr<Region*> try_allocate_split_region(Region const& source_region, VirtualRange const&, size_t offset_in_vmobject);
44 ErrorOr<Vector<Region*, 2>> try_split_region_around_range(Region const& source_region, VirtualRange const&);
45
46 Region* find_region_from_range(VirtualRange const&);
47 Region* find_region_containing(VirtualRange const&);
48
49 ErrorOr<Vector<Region*, 4>> find_regions_intersecting(VirtualRange const&);
50
51 bool enforces_syscall_regions() const { return m_enforces_syscall_regions; }
52 void set_enforces_syscall_regions(bool b) { m_enforces_syscall_regions = b; }
53
54 void remove_all_regions(Badge<Process>);
55
56 ErrorOr<size_t> amount_clean_inode() const;
57 size_t amount_dirty_private() const;
58 size_t amount_virtual() const;
59 size_t amount_resident() const;
60 size_t amount_shared() const;
61 size_t amount_purgeable_volatile() const;
62 size_t amount_purgeable_nonvolatile() const;
63
64private:
65 AddressSpace(NonnullLockRefPtr<PageDirectory>, VirtualRange total_range);
66
67 LockRefPtr<PageDirectory> m_page_directory;
68
69 RegionTree m_region_tree;
70
71 bool m_enforces_syscall_regions { false };
72};
73
74}