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Add basic zero faults.

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mmap() will now map uncommitted pages that get allocated and zeroed upon the
first access. I also made /proc/PID/vm show number of "committed" bytes in
each region. This is so cool! :^)
This commit is contained in:
Andreas Kling 2018-11-19 02:17:20 +01:00
parent e88f306d07
commit 629c5be10b
5 changed files with 42 additions and 7 deletions
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2
Kernel/Process.h
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@ -283,7 +283,7 @@ private:
TTY* m_tty { nullptr };
Region* allocate_region(LinearAddress, size_t, String&& name, bool is_readable = true, bool is_writable = true);
Region* allocate_region(LinearAddress, size_t, String&& name, bool is_readable = true, bool is_writable = true, bool commit = true);
Region* allocate_file_backed_region(LinearAddress, size_t, RetainPtr<Vnode>&& vnode, String&& name, bool is_readable, bool is_writable);
Region* allocate_region_with_vmo(LinearAddress, size_t, RetainPtr<VMObject>&&, size_t offset_in_vmo, String&& name, bool is_readable, bool is_writable);
bool deallocate_region(Region& region);