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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Leon Albrecht <leon2002.la@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/RedBlackTree.h>
#include <AK/Vector.h>
#include <AK/WeakPtr.h>
#include <Kernel/UnixTypes.h>
#include <Kernel/VM/AllocationStrategy.h>
#include <Kernel/VM/PageDirectory.h>
namespace Kernel {
class Space {
public:
static OwnPtr<Space> create(Process&, const Space* parent);
~Space();
PageDirectory& page_directory() { return *m_page_directory; }
const PageDirectory& page_directory() const { return *m_page_directory; }
Region& add_region(NonnullOwnPtr<Region>);
size_t region_count() const { return m_regions.size(); }
RedBlackTree<FlatPtr, NonnullOwnPtr<Region>>& regions() { return m_regions; }
const RedBlackTree<FlatPtr, NonnullOwnPtr<Region>>& regions() const { return m_regions; }
void dump_regions();
Optional<Range> allocate_range(VirtualAddress, size_t, size_t alignment = PAGE_SIZE);
KResultOr<Region*> allocate_region_with_vmobject(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot, bool shared);
KResultOr<Region*> allocate_region(const Range&, const String& name, int prot = PROT_READ | PROT_WRITE, AllocationStrategy strategy = AllocationStrategy::Reserve);
bool deallocate_region(Region& region);
OwnPtr<Region> take_region(Region& region);
Region& allocate_split_region(const Region& source_region, const Range&, size_t offset_in_vmobject);
Vector<Region*, 2> split_region_around_range(const Region& source_region, const Range&);
Region* find_region_from_range(const Range&);
Region* find_region_containing(const Range&);
Vector<Region*> find_regions_intersecting(const Range&);
bool enforces_syscall_regions() const { return m_enforces_syscall_regions; }
void set_enforces_syscall_regions(bool b) { m_enforces_syscall_regions = b; }
void remove_all_regions(Badge<Process>);
RecursiveSpinLock& get_lock() const { return m_lock; }
size_t amount_clean_inode() const;
size_t amount_dirty_private() const;
size_t amount_virtual() const;
size_t amount_resident() const;
size_t amount_shared() const;
size_t amount_purgeable_volatile() const;
size_t amount_purgeable_nonvolatile() const;
private:
Space(Process&, NonnullRefPtr<PageDirectory>);
Process* m_process { nullptr };
mutable RecursiveSpinLock m_lock;
RefPtr<PageDirectory> m_page_directory;
RedBlackTree<FlatPtr, NonnullOwnPtr<Region>> m_regions;
struct RegionLookupCache {
Optional<Range> range;
WeakPtr<Region> region;
};
RegionLookupCache m_region_lookup_cache;
bool m_enforces_syscall_regions { false };
};
}
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