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Kernel: Make Region single-owner instead of ref-counted

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This simplifies the ownership model and makes Region easier to reason
about. Userspace Regions are now primarily kept by Process::m_regions.

Kernel Regions are kept in various OwnPtr<Regions>'s.

Regions now only ever get unmapped when they are destroyed.
This commit is contained in:
Andreas Kling 2019-09-27 14:19:07 +02:00
parent 7a7f6a24e9
commit 7f9a33dba1
9 changed files with 44 additions and 41 deletions
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4
Kernel/Thread.h
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@ -327,8 +327,8 @@ private:
u32 m_signal_mask { 0 };
u32 m_kernel_stack_base { 0 };
u32 m_kernel_stack_top { 0 };
RefPtr<Region> m_userspace_stack_region;
RefPtr<Region> m_kernel_stack_region;
Region* m_userspace_stack_region { nullptr };
OwnPtr<Region> m_kernel_stack_region;
VirtualAddress m_thread_specific_data;
SignalActionData m_signal_action_data[32];
Blocker* m_blocker { nullptr };