24.04.03 PintOS

야호!!!!!!

성공적으로 project3를 끝마친 것 같다.

생각보다 너무 잘했고, 힘들었지만 그만큼의 성취감도 있었다. 야호~

PintOS

bool file_backed_initializer(struct page *page, enum vm_type type, void *kva)
{
    /* Set up the handler */
    page->operations = &file_ops;

    struct file_page *file_page = &page->file;

    file_page->aux = page->uninit.aux;

    return true;
}

swap in을 위해서 page->uninit.aux를 file\_page->aux에 받아왔다.

static bool file_backed_swap_out(struct page *page)
{
    struct file_page *file_page UNUSED = &page->file;
    if(page==NULL){
        return false;
    }
    struct necessary_info *nec = file_page->aux;
    struct file* file = nec->file;
    lock_acquire(&file_lock);
    if(pml4_is_dirty(thread_current()->pml4,page->va)){
        file_write_at(file,page->va, nec->read_byte, nec->ofs);
        pml4_set_dirty(thread_current()->pml4, page->va, 0);
    }
    pml4_clear_page(thread_current()->pml4, page->va);
    lock_release(&file_lock);
    return true;
}

file-backed는 anon과 달리 스왑 디스크가 아니라 파일에 스왑한다.

페이지의 내용이 변경된 적이 있다면 변경된 내용을 파일 갱신하고 dirty 비트를 0으로 변경한다.

이후 pml4_clear_page() 사용했다.

static bool file_backed_swap_in(struct page *page, void *kva)
{
    struct file_page *file_page UNUSED = &page->file;
    struct necessary_info *nec = (struct necessary_info *)file_page->aux;

    file_seek(nec->file, nec->ofs);
    lock_acquire(&file_lock);
    file_read(file_page->file, kva, nec->read_byte);
    lock_release(&file_lock);

    memset(kva + nec->read_byte, 0, nec->zero_byte);

    return true;
}

file_seek()를 통해 파일의 오프셋을 변경해 주고 파일에서 물리 메모리로 데이터를 가져온다.

이후 memset()을 통해 제로 바이트 영역을 0으로 세팅해 주었다.

진행상황

pass tests/userprog/args-none
pass tests/userprog/args-single
pass tests/userprog/args-multiple
pass tests/userprog/args-many
pass tests/userprog/args-dbl-space
pass tests/userprog/halt
pass tests/userprog/exit
pass tests/userprog/create-normal
pass tests/userprog/create-empty
pass tests/userprog/create-null
pass tests/userprog/create-bad-ptr
pass tests/userprog/create-long
pass tests/userprog/create-exists
pass tests/userprog/create-bound
pass tests/userprog/open-normal
pass tests/userprog/open-missing
pass tests/userprog/open-boundary
pass tests/userprog/open-empty
pass tests/userprog/open-null
pass tests/userprog/open-bad-ptr
pass tests/userprog/open-twice
pass tests/userprog/close-normal
pass tests/userprog/close-twice
pass tests/userprog/close-bad-fd
pass tests/userprog/read-normal
pass tests/userprog/read-bad-ptr
pass tests/userprog/read-boundary
pass tests/userprog/read-zero
pass tests/userprog/read-stdout
pass tests/userprog/read-bad-fd
pass tests/userprog/write-normal
pass tests/userprog/write-bad-ptr
pass tests/userprog/write-boundary
pass tests/userprog/write-zero
pass tests/userprog/write-stdin
pass tests/userprog/write-bad-fd
pass tests/userprog/fork-once
pass tests/userprog/fork-multiple
pass tests/userprog/fork-recursive
pass tests/userprog/fork-read
pass tests/userprog/fork-close
pass tests/userprog/fork-boundary
pass tests/userprog/exec-once
pass tests/userprog/exec-arg
pass tests/userprog/exec-boundary
pass tests/userprog/exec-missing
pass tests/userprog/exec-bad-ptr
pass tests/userprog/exec-read
pass tests/userprog/wait-simple
pass tests/userprog/wait-twice
pass tests/userprog/wait-killed
pass tests/userprog/wait-bad-pid
pass tests/userprog/multi-recurse
pass tests/userprog/multi-child-fd
pass tests/userprog/rox-simple
pass tests/userprog/rox-child
pass tests/userprog/rox-multichild
pass tests/userprog/bad-read
pass tests/userprog/bad-write
pass tests/userprog/bad-read2
pass tests/userprog/bad-write2
pass tests/userprog/bad-jump
pass tests/userprog/bad-jump2
pass tests/vm/pt-grow-stack
pass tests/vm/pt-grow-bad
pass tests/vm/pt-big-stk-obj
pass tests/vm/pt-bad-addr
pass tests/vm/pt-bad-read
pass tests/vm/pt-write-code
pass tests/vm/pt-write-code2
pass tests/vm/pt-grow-stk-sc
pass tests/vm/page-linear
pass tests/vm/page-parallel
pass tests/vm/page-merge-seq
pass tests/vm/page-merge-par
pass tests/vm/page-merge-stk
pass tests/vm/page-merge-mm
pass tests/vm/page-shuffle
pass tests/vm/mmap-read
pass tests/vm/mmap-close
pass tests/vm/mmap-unmap
pass tests/vm/mmap-overlap
pass tests/vm/mmap-twice
pass tests/vm/mmap-write
pass tests/vm/mmap-ro
pass tests/vm/mmap-exit
pass tests/vm/mmap-shuffle
pass tests/vm/mmap-bad-fd
pass tests/vm/mmap-clean
pass tests/vm/mmap-inherit
pass tests/vm/mmap-misalign
pass tests/vm/mmap-null
pass tests/vm/mmap-over-code
pass tests/vm/mmap-over-data
pass tests/vm/mmap-over-stk
pass tests/vm/mmap-remove
pass tests/vm/mmap-zero
pass tests/vm/mmap-bad-fd2
pass tests/vm/mmap-bad-fd3
pass tests/vm/mmap-zero-len
pass tests/vm/mmap-off
pass tests/vm/mmap-bad-off
pass tests/vm/mmap-kernel
pass tests/vm/lazy-file
pass tests/vm/lazy-anon
pass tests/vm/swap-file
pass tests/vm/swap-anon
pass tests/vm/swap-iter
pass tests/vm/swap-fork
pass tests/filesys/base/lg-create
pass tests/filesys/base/lg-full
pass tests/filesys/base/lg-random
pass tests/filesys/base/lg-seq-block
pass tests/filesys/base/lg-seq-random
pass tests/filesys/base/sm-create
pass tests/filesys/base/sm-full
pass tests/filesys/base/sm-random
pass tests/filesys/base/sm-seq-block
pass tests/filesys/base/sm-seq-random
pass tests/filesys/base/syn-read
pass tests/filesys/base/syn-remove
pass tests/filesys/base/syn-write
pass tests/threads/alarm-single
pass tests/threads/alarm-multiple
pass tests/threads/alarm-simultaneous
pass tests/threads/alarm-priority
pass tests/threads/alarm-zero
pass tests/threads/alarm-negative
pass tests/threads/priority-change
pass tests/threads/priority-donate-one
pass tests/threads/priority-donate-multiple
pass tests/threads/priority-donate-multiple2
pass tests/threads/priority-donate-nest
pass tests/threads/priority-donate-sema
pass tests/threads/priority-donate-lower
pass tests/threads/priority-fifo
pass tests/threads/priority-preempt
pass tests/threads/priority-sema
pass tests/threads/priority-condvar
pass tests/threads/priority-donate-chain
FAIL tests/vm/cow/cow-simple
1 of 141 tests failed.

야호!!!!!!!!