mirror of
https://github.com/SerenityOS/serenity
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93 lines
3.5 KiB
C
93 lines
3.5 KiB
C
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/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/NonnullOwnPtrVector.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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NonnullOwnPtrVector<Region>& regions() { return m_regions; }
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const NonnullOwnPtrVector<Region>& regions() const { return m_regions; }
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void dump_regions();
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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, const String& name, int prot, bool shared);
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KResultOr<Region*> allocate_region(const Range&, const String& name, int prot = PROT_READ | PROT_WRITE, AllocationStrategy strategy = AllocationStrategy::Reserve);
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bool deallocate_region(Region& region);
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Region& allocate_split_region(const Region& source_region, const Range&, size_t offset_in_vmobject);
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Vector<Region*, 2> split_region_around_range(const Region& source_region, const Range&);
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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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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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SpinLock<u32>& get_lock() const { return m_lock; }
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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 SpinLock<u32> m_lock;
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RefPtr<PageDirectory> m_page_directory;
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NonnullOwnPtrVector<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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