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https://github.com/SerenityOS/serenity
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e756567341
This flag is set only once, and should never reset once it has been set, making it an ideal SetOnce use-case. It also simplifies the expected conditions for the enabling prctl call, as we don't expect a boolean flag, but rather the specific prctl option will always set (enable) Process' AddressSpace syscall region enforcing.
76 lines
3.0 KiB
C++
76 lines
3.0 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Leon Albrecht <leon2002.la@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/RedBlackTree.h>
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#include <AK/SetOnce.h>
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#include <AK/Vector.h>
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#include <Kernel/Arch/PageDirectory.h>
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#include <Kernel/Library/LockWeakPtr.h>
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#include <Kernel/Locking/SpinlockProtected.h>
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#include <Kernel/Memory/AllocationStrategy.h>
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#include <Kernel/Memory/Region.h>
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#include <Kernel/Memory/RegionTree.h>
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#include <Kernel/UnixTypes.h>
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namespace Kernel::Memory {
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class AddressSpace {
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public:
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static ErrorOr<NonnullOwnPtr<AddressSpace>> try_create(Process&, AddressSpace const* parent);
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~AddressSpace();
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PageDirectory& page_directory() { return *m_page_directory; }
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PageDirectory const& page_directory() const { return *m_page_directory; }
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RegionTree& region_tree() { return m_region_tree; }
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RegionTree const& region_tree() const { return m_region_tree; }
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void dump_regions();
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ErrorOr<void> unmap_mmap_range(VirtualAddress, size_t);
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ErrorOr<Region*> allocate_region_with_vmobject(VirtualRange requested_range, NonnullLockRefPtr<VMObject>, size_t offset_in_vmobject, StringView name, int prot, bool shared);
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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);
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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);
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void deallocate_region(Region& region);
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NonnullOwnPtr<Region> take_region(Region& region);
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ErrorOr<Region*> try_allocate_split_region(Region const& source_region, VirtualRange const&, size_t offset_in_vmobject);
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ErrorOr<Vector<Region*, 2>> try_split_region_around_range(Region const& source_region, VirtualRange const&);
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Region* find_region_from_range(VirtualRange const&);
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Region* find_region_containing(VirtualRange const&);
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ErrorOr<Vector<Region*, 4>> find_regions_intersecting(VirtualRange const&);
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bool enforces_syscall_regions() const { return m_enforces_syscall_regions.was_set(); }
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void set_enforces_syscall_regions() { m_enforces_syscall_regions.set(); }
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void remove_all_regions(Badge<Process>);
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ErrorOr<size_t> amount_clean_inode() const;
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size_t amount_dirty_private() const;
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size_t amount_virtual() const;
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size_t amount_resident() const;
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size_t amount_shared() const;
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size_t amount_purgeable_volatile() const;
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size_t amount_purgeable_nonvolatile() const;
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private:
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AddressSpace(NonnullLockRefPtr<PageDirectory>, VirtualRange total_range);
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LockRefPtr<PageDirectory> m_page_directory;
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RegionTree m_region_tree;
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SetOnce m_enforces_syscall_regions;
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};
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}
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