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https://github.com/neovim/neovim.git
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95839a2358
Problem: Crash when recovering from corrupted swap file.
Solution: Bail out when the line index looks wrong. (closes vim/vim#12276)
bf1b713202
Co-authored-by: Bram Moolenaar <Bram@vim.org>
491 lines
13 KiB
VimL
491 lines
13 KiB
VimL
" Test :recover
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source check.vim
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func Test_recover_root_dir()
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" This used to access invalid memory.
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split Xtest
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set dir=/
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call assert_fails('recover', 'E305:')
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close!
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if has('win32')
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" can write in / directory on MS-Windows
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let &directory = 'F:\\'
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elseif filewritable('/') == 2
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set dir=/notexist/
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endif
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call assert_fails('split Xtest', 'E303:')
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" No error with empty 'directory' setting.
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set directory=
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split XtestOK
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close!
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set dir&
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endfunc
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" Make a copy of the current swap file to "Xswap".
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" Return the name of the swap file.
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func CopySwapfile()
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preserve
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" get the name of the swap file
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let swname = split(execute("swapname"))[0]
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let swname = substitute(swname, '[[:blank:][:cntrl:]]*\(.\{-}\)[[:blank:][:cntrl:]]*$', '\1', '')
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" make a copy of the swap file in Xswap
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set binary
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exe 'sp ' . swname
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w! Xswap
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set nobinary
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return swname
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endfunc
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" Inserts 10000 lines with text to fill the swap file with two levels of pointer
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" blocks. Then recovers from the swap file and checks all text is restored.
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"
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" We need about 10000 lines of 100 characters to get two levels of pointer
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" blocks.
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func Test_swap_file()
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set directory=.
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set fileformat=unix undolevels=-1
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edit! Xtest
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let text = "\tabcdefghijklmnoparstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnoparstuvwxyz0123456789"
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let i = 1
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let linecount = 10000
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while i <= linecount
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call append(i - 1, i . text)
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let i += 1
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endwhile
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$delete
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let swname = CopySwapfile()
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new
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only!
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bwipe! Xtest
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call rename('Xswap', swname)
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recover Xtest
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call delete(swname)
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let linedollar = line('$')
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call assert_equal(linecount, linedollar)
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if linedollar < linecount
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let linecount = linedollar
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endif
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let i = 1
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while i <= linecount
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call assert_equal(i . text, getline(i))
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let i += 1
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endwhile
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set undolevels&
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enew! | only
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endfunc
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func Test_nocatch_process_still_running()
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let g:skipped_reason = 'test_override() is N/A'
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return
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" sysinfo.uptime probably only works on Linux
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if !has('linux')
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let g:skipped_reason = 'only works on Linux'
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return
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endif
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" the GUI dialog can't be handled
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if has('gui_running')
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let g:skipped_reason = 'only works in the terminal'
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return
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endif
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" don't intercept existing swap file here
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au! SwapExists
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" Edit a file and grab its swapfile.
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edit Xswaptest
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call setline(1, ['a', 'b', 'c'])
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let swname = CopySwapfile()
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" Forget we edited this file
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new
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only!
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bwipe! Xswaptest
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call rename('Xswap', swname)
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call feedkeys('e', 'tL')
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redir => editOutput
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edit Xswaptest
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redir END
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call assert_match('E325: ATTENTION', editOutput)
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call assert_match('file name: .*Xswaptest', editOutput)
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call assert_match('process ID: \d* (STILL RUNNING)', editOutput)
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" Forget we edited this file
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new
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only!
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bwipe! Xswaptest
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" pretend we rebooted
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call test_override("uptime", 0)
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sleep 1
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call feedkeys('e', 'tL')
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redir => editOutput
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edit Xswaptest
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redir END
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call assert_match('E325: ATTENTION', editOutput)
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call assert_notmatch('(STILL RUNNING)', editOutput)
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call test_override("ALL", 0)
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call delete(swname)
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endfunc
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" Test for :recover with multiple swap files
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func Test_recover_multiple_swap_files()
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CheckUnix
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new Xfile1
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call setline(1, ['a', 'b', 'c'])
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preserve
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let b = readblob(swapname(''))
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call writefile(b, '.Xfile1.swm')
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call writefile(b, '.Xfile1.swn')
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call writefile(b, '.Xfile1.swo')
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%bw!
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call feedkeys(":recover Xfile1\<CR>3\<CR>q", 'xt')
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call assert_equal(['a', 'b', 'c'], getline(1, '$'))
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" try using out-of-range number to select a swap file
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bw!
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call feedkeys(":recover Xfile1\<CR>4\<CR>q", 'xt')
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call assert_equal('Xfile1', @%)
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call assert_equal([''], getline(1, '$'))
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bw!
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call feedkeys(":recover Xfile1\<CR>0\<CR>q", 'xt')
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call assert_equal('Xfile1', @%)
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call assert_equal([''], getline(1, '$'))
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bw!
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call delete('.Xfile1.swm')
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call delete('.Xfile1.swn')
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call delete('.Xfile1.swo')
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endfunc
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" Test for :recover using an empty swap file
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func Test_recover_empty_swap_file()
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CheckUnix
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call writefile([], '.Xfile1.swp')
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let msg = execute('recover Xfile1')
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call assert_match('Unable to read block 0 from .Xfile1.swp', msg)
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call assert_equal('Xfile1', @%)
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bw!
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" make sure there are no old swap files laying around
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for f in glob('.sw?', 0, 1)
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call delete(f)
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endfor
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" :recover from an empty buffer
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call assert_fails('recover', 'E305:')
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call delete('.Xfile1.swp')
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endfunc
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" Test for :recover using a corrupted swap file
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" Refer to the comments in the memline.c file for the swap file headers
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" definition.
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func Test_recover_corrupted_swap_file()
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CheckUnix
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" recover using a partial swap file
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call writefile(0z1234, '.Xfile1.swp')
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call assert_fails('recover Xfile1', 'E295:')
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bw!
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" recover using invalid content in the swap file
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call writefile([repeat('1', 2*1024)], '.Xfile1.swp')
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call assert_fails('recover Xfile1', 'E307:')
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call delete('.Xfile1.swp')
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" :recover using a swap file with a corrupted header
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edit Xfile1
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preserve
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let sn = swapname('')
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let b = readblob(sn)
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let save_b = copy(b)
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bw!
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" Not all fields are written in a system-independent manner. Detect whether
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" the test is running on a little or big-endian system, so the correct
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" corruption values can be set.
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" The B0_MAGIC_LONG field may be 32-bit or 64-bit, depending on the system,
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" even though the value stored is only 32-bits. Therefore, need to check
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" both the high and low 32-bits to compute these values.
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let little_endian = (b[1008:1011] == 0z33323130) || (b[1012:1015] == 0z33323130)
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let system_64bit = little_endian ? (b[1012:1015] == 0z00000000) : (b[1008:1011] == 0z00000000)
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" clear the B0_MAGIC_LONG field
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if system_64bit
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let b[1008:1015] = 0z00000000.00000000
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else
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let b[1008:1011] = 0z00000000
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endif
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call writefile(b, sn)
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let msg = execute('recover Xfile1')
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call assert_match('the file has been damaged', msg)
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call assert_equal('Xfile1', @%)
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call assert_equal([''], getline(1, '$'))
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bw!
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" reduce the page size
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let b = copy(save_b)
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let b[12:15] = 0z00010000
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call writefile(b, sn)
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let msg = execute('recover Xfile1')
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call assert_match('page size is smaller than minimum value', msg)
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call assert_equal('Xfile1', @%)
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call assert_equal([''], getline(1, '$'))
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bw!
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" clear the pointer ID
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let b = copy(save_b)
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let b[4096:4097] = 0z0000
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call writefile(b, sn)
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call assert_fails('recover Xfile1', 'E310:')
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call assert_equal('Xfile1', @%)
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call assert_equal([''], getline(1, '$'))
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bw!
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" set the number of pointers in a pointer block to zero
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let b = copy(save_b)
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let b[4098:4099] = 0z0000
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call writefile(b, sn)
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call assert_fails('recover Xfile1', 'E312:')
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call assert_equal('Xfile1', @%)
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call assert_equal(['???EMPTY BLOCK'], getline(1, '$'))
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bw!
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" set the number of pointers in a pointer block to a large value
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let b = copy(save_b)
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let b[4098:4099] = 0zFFFF
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call writefile(b, sn)
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call assert_fails('recover Xfile1', 'E1364:')
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call assert_equal('Xfile1', @%)
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bw!
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" set the block number in a pointer entry to a negative number
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let b = copy(save_b)
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if system_64bit
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let b[4104:4111] = little_endian ? 0z00000000.00000080 : 0z80000000.00000000
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else
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let b[4104:4107] = little_endian ? 0z00000080 : 0z80000000
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endif
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call writefile(b, sn)
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call assert_fails('recover Xfile1', 'E312:')
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call assert_equal('Xfile1', @%)
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call assert_equal(['???LINES MISSING'], getline(1, '$'))
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bw!
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" clear the data block ID
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let b = copy(save_b)
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let b[8192:8193] = 0z0000
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call writefile(b, sn)
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call assert_fails('recover Xfile1', 'E312:')
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call assert_equal('Xfile1', @%)
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call assert_equal(['???BLOCK MISSING'], getline(1, '$'))
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bw!
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" set the number of lines in the data block to zero
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let b = copy(save_b)
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if system_64bit
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let b[8208:8215] = 0z00000000.00000000
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else
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let b[8208:8211] = 0z00000000
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endif
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call writefile(b, sn)
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call assert_fails('recover Xfile1', 'E312:')
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call assert_equal('Xfile1', @%)
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call assert_equal(['??? from here until ???END lines may have been inserted/deleted',
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\ '???END'], getline(1, '$'))
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bw!
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" set the number of lines in the data block to a large value
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let b = copy(save_b)
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if system_64bit
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let b[8208:8215] = 0z00FFFFFF.FFFFFF00
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else
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let b[8208:8211] = 0z00FFFF00
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endif
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call writefile(b, sn)
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call assert_fails('recover Xfile1', 'E312:')
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call assert_equal('Xfile1', @%)
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call assert_equal(['??? from here until ???END lines may have been inserted/deleted',
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\ '', '???', '??? lines may be missing',
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\ '???END'], getline(1, '$'))
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bw!
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" use an invalid text start for the lines in a data block
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let b = copy(save_b)
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if system_64bit
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let b[8216:8219] = 0z00000000
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else
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let b[8212:8215] = 0z00000000
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endif
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call writefile(b, sn)
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call assert_fails('recover Xfile1', 'E312:')
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call assert_equal('Xfile1', @%)
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call assert_equal(['???'], getline(1, '$'))
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bw!
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" use an incorrect text end (db_txt_end) for the data block
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let b = copy(save_b)
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let b[8204:8207] = little_endian ? 0z80000000 : 0z00000080
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call writefile(b, sn)
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call assert_fails('recover Xfile1', 'E312:')
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call assert_equal('Xfile1', @%)
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call assert_equal(['??? from here until ???END lines may be messed up', '',
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\ '???END'], getline(1, '$'))
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bw!
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" remove the data block
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let b = copy(save_b)
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call writefile(b[:8191], sn)
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call assert_fails('recover Xfile1', 'E312:')
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call assert_equal('Xfile1', @%)
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call assert_equal(['???MANY LINES MISSING'], getline(1, '$'))
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bw!
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call delete(sn)
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endfunc
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" Test for :recover using an encrypted swap file
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func Test_recover_encrypted_swap_file()
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CheckFeature cryptv
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CheckUnix
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" Recover an encrypted file from the swap file without the original file
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new Xfile1
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call feedkeys(":X\<CR>vim\<CR>vim\<CR>", 'xt')
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call setline(1, ['aaa', 'bbb', 'ccc'])
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preserve
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let b = readblob('.Xfile1.swp')
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call writefile(b, '.Xfile1.swm')
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bw!
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call feedkeys(":recover Xfile1\<CR>vim\<CR>\<CR>", 'xt')
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call assert_equal(['aaa', 'bbb', 'ccc'], getline(1, '$'))
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bw!
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call delete('.Xfile1.swm')
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" Recover an encrypted file from the swap file with the original file
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new Xfile1
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call feedkeys(":X\<CR>vim\<CR>vim\<CR>", 'xt')
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call setline(1, ['aaa', 'bbb', 'ccc'])
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update
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call setline(1, ['111', '222', '333'])
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preserve
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let b = readblob('.Xfile1.swp')
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call writefile(b, '.Xfile1.swm')
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bw!
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call feedkeys(":recover Xfile1\<CR>vim\<CR>\<CR>", 'xt')
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call assert_equal(['111', '222', '333'], getline(1, '$'))
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call assert_true(&modified)
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bw!
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call delete('.Xfile1.swm')
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call delete('Xfile1')
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endfunc
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" Test for :recover using a unreadable swap file
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func Test_recover_unreadble_swap_file()
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CheckUnix
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CheckNotRoot
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new Xfile1
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let b = readblob('.Xfile1.swp')
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call writefile(b, '.Xfile1.swm')
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bw!
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call setfperm('.Xfile1.swm', '-w-------')
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call assert_fails('recover Xfile1', 'E306:')
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call delete('.Xfile1.swm')
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endfunc
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" Test for using :recover when the original file and the swap file have the
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" same contents.
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func Test_recover_unmodified_file()
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CheckUnix
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call writefile(['aaa', 'bbb', 'ccc'], 'Xfile1')
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edit Xfile1
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preserve
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let b = readblob('.Xfile1.swp')
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%bw!
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call writefile(b, '.Xfile1.swz')
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let msg = execute('recover Xfile1')
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call assert_equal(['aaa', 'bbb', 'ccc'], getline(1, '$'))
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call assert_false(&modified)
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call assert_match('Buffer contents equals file contents', msg)
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bw!
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call delete('Xfile1')
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call delete('.Xfile1.swz')
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endfunc
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" Test for recovering a file when editing a symbolically linked file
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func Test_recover_symbolic_link()
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CheckUnix
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call writefile(['aaa', 'bbb', 'ccc'], 'Xfile1')
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silent !ln -s Xfile1 Xfile2
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edit Xfile2
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call assert_equal('.Xfile1.swp', fnamemodify(swapname(''), ':t'))
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preserve
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let b = readblob('.Xfile1.swp')
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%bw!
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call writefile([], 'Xfile1')
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call writefile(b, '.Xfile1.swp')
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silent! recover Xfile2
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call assert_equal(['aaa', 'bbb', 'ccc'], getline(1, '$'))
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call assert_true(&modified)
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update
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%bw!
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call assert_equal(['aaa', 'bbb', 'ccc'], readfile('Xfile1'))
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call delete('Xfile1')
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call delete('Xfile2')
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call delete('.Xfile1.swp')
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endfunc
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" Test for recovering a file when an autocmd moves the cursor to an invalid
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" line. This used to result in an internal error (E315) which is fixed
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" by 8.2.2966.
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func Test_recover_invalid_cursor_pos()
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call writefile([], 'Xfile1')
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edit Xfile1
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preserve
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let b = readblob('.Xfile1.swp')
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bw!
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augroup Test
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au!
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au BufReadPost Xfile1 normal! 3G
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augroup END
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call writefile(range(1, 3), 'Xfile1')
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call writefile(b, '.Xfile1.swp')
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try
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recover Xfile1
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catch /E308:/
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" this test is for the :E315 internal error.
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" ignore the 'E308: Original file may have been changed' error
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endtry
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redraw!
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augroup Test
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au!
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augroup END
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augroup! Test
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call delete('Xfile1')
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call delete('.Xfile1.swp')
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endfunc
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" Test for recovering a buffer without a name
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func Test_noname_buffer()
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new
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call setline(1, ['one', 'two'])
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preserve
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let sn = swapname('')
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let b = readblob(sn)
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bw!
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call writefile(b, sn)
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exe "recover " .. sn
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call assert_equal(['one', 'two'], getline(1, '$'))
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call delete(sn)
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endfunc
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" vim: shiftwidth=2 sts=2 expandtab
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