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c0987453e6
We should never request a regions removal that we don't currently own. We currently assert this everywhere else by all callers. Instead lets just push the assert down into the RedBlackTree removal and assume that we will always successfully remove the region.
88 lines
2.8 KiB
C++
88 lines
2.8 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/Vector.h>
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#include <AK/WeakPtr.h>
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#include <Kernel/UnixTypes.h>
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#include <Kernel/VM/AllocationStrategy.h>
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#include <Kernel/VM/PageDirectory.h>
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namespace Kernel {
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class Space {
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public:
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static OwnPtr<Space> create(Process&, const Space* parent);
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~Space();
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PageDirectory& page_directory() { return *m_page_directory; }
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const PageDirectory& page_directory() const { return *m_page_directory; }
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Region* add_region(NonnullOwnPtr<Region>);
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size_t region_count() const { return m_regions.size(); }
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RedBlackTree<FlatPtr, NonnullOwnPtr<Region>>& regions() { return m_regions; }
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const RedBlackTree<FlatPtr, NonnullOwnPtr<Region>>& regions() const { return m_regions; }
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void dump_regions();
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KResult unmap_mmap_range(VirtualAddress, size_t);
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Optional<Range> allocate_range(VirtualAddress, size_t, size_t alignment = PAGE_SIZE);
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KResultOr<Region*> allocate_region_with_vmobject(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, StringView name, int prot, bool shared);
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KResultOr<Region*> allocate_region(const Range&, 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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KResultOr<Region*> try_allocate_split_region(Region const& source_region, Range const&, size_t offset_in_vmobject);
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KResultOr<Vector<Region*, 2>> try_split_region_around_range(Region const& source_region, Range const&);
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Region* find_region_from_range(const Range&);
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Region* find_region_containing(const Range&);
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Vector<Region*> find_regions_intersecting(const Range&);
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bool enforces_syscall_regions() const { return m_enforces_syscall_regions; }
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void set_enforces_syscall_regions(bool b) { m_enforces_syscall_regions = b; }
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void remove_all_regions(Badge<Process>);
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RecursiveSpinLock& get_lock() const { return m_lock; }
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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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Space(Process&, NonnullRefPtr<PageDirectory>);
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Process* m_process { nullptr };
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mutable RecursiveSpinLock m_lock;
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RefPtr<PageDirectory> m_page_directory;
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RedBlackTree<FlatPtr, NonnullOwnPtr<Region>> m_regions;
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struct RegionLookupCache {
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Optional<Range> range;
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WeakPtr<Region> region;
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};
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RegionLookupCache m_region_lookup_cache;
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bool m_enforces_syscall_regions { false };
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};
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}
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