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339 lines
10 KiB
Plaintext
339 lines
10 KiB
Plaintext
# 2010 May 24
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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source $testdir/lock_common.tcl
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source $testdir/wal_common.tcl
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ifcapable !wal {finish_test ; return }
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# Read and return the contents of file $filename. Treat the content as
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# binary data.
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#
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proc readfile {filename} {
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set fd [open $filename]
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fconfigure $fd -encoding binary
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fconfigure $fd -translation binary
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set data [read $fd]
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close $fd
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return $data
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}
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#
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# File $filename must be a WAL file on disk. Check that the checksum of frame
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# $iFrame in the file is correct when interpreting data as $endian-endian
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# integers ($endian must be either "big" or "little"). If the checksum looks
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# correct, return 1. Otherwise 0.
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#
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proc log_checksum_verify {filename iFrame endian} {
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set data [readfile $filename]
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foreach {offset c1 c2} [log_checksum_calc $data $iFrame $endian] {}
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binary scan [string range $data $offset [expr $offset+7]] II expect1 expect2
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set expect1 [expr $expect1&0xFFFFFFFF]
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set expect2 [expr $expect2&0xFFFFFFFF]
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expr {$c1==$expect1 && $c2==$expect2}
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}
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# File $filename must be a WAL file on disk. Compute the checksum for frame
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# $iFrame in the file by interpreting data as $endian-endian integers
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# ($endian must be either "big" or "little"). Then write the computed
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# checksum into the file.
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#
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proc log_checksum_write {filename iFrame endian} {
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set data [readfile $filename]
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foreach {offset c1 c2} [log_checksum_calc $data $iFrame $endian] {}
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set bin [binary format II $c1 $c2]
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set fd [open $filename r+]
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fconfigure $fd -encoding binary
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fconfigure $fd -translation binary
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seek $fd $offset
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puts -nonewline $fd $bin
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close $fd
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}
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# Calculate and return the checksum for a particular frame in a WAL.
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#
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# Arguments are:
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#
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# $data Blob containing the entire contents of a WAL.
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#
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# $iFrame Frame number within the $data WAL. Frames are numbered
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# starting at 1.
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#
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# $endian One of "big" or "little".
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#
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# Returns a list of three elements, as follows:
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#
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# * The byte offset of the checksum belonging to frame $iFrame in the WAL.
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# * The first integer in the calculated version of the checksum.
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# * The second integer in the calculated version of the checksum.
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#
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proc log_checksum_calc {data iFrame endian} {
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binary scan [string range $data 8 11] I pgsz
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if {$iFrame > 1} {
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set n [wal_file_size [expr $iFrame-2] $pgsz]
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binary scan [string range $data [expr $n+16] [expr $n+23]] II c1 c2
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} else {
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set c1 0
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set c2 0
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wal_cksum $endian c1 c2 [string range $data 0 23]
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}
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set n [wal_file_size [expr $iFrame-1] $pgsz]
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wal_cksum $endian c1 c2 [string range $data $n [expr $n+7]]
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wal_cksum $endian c1 c2 [string range $data [expr $n+24] [expr $n+24+$pgsz-1]]
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list [expr $n+16] $c1 $c2
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}
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#
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# File $filename must be a WAL file on disk. Set the 'magic' field of the
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# WAL header to indicate that checksums are $endian-endian ($endian must be
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# either "big" or "little").
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#
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# Also update the wal header checksum (since the wal header contents may
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# have changed).
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#
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proc log_checksum_writemagic {filename endian} {
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set val [expr {0x377f0682 | ($endian == "big" ? 1 : 0)}]
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set bin [binary format I $val]
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set fd [open $filename r+]
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fconfigure $fd -encoding binary
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fconfigure $fd -translation binary
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puts -nonewline $fd $bin
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seek $fd 0
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set blob [read $fd 24]
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set c1 0
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set c2 0
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wal_cksum $endian c1 c2 $blob
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seek $fd 24
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puts -nonewline $fd [binary format II $c1 $c2]
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close $fd
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}
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#-------------------------------------------------------------------------
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# Test cases walcksum-1.* attempt to verify the following:
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#
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# * That both native and non-native order checksum log files can
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# be recovered.
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#
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# * That when appending to native or non-native checksum log files
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# SQLite continues to use the right kind of checksums.
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#
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# * Test point 2 when the appending process is not one that recovered
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# the log file.
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#
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# * Test that both native and non-native checksum log files can be
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# checkpointed. And that after doing so the next write to the log
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# file occurs using native byte-order checksums.
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#
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set native "big"
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if {$::tcl_platform(byteOrder) == "littleEndian"} { set native "little" }
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foreach endian {big little} {
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# Create a database. Leave some data in the log file.
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#
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do_test walcksum-1.$endian.1 {
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catch { db close }
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forcedelete test.db test.db-wal test.db-journal
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sqlite3 db test.db
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execsql {
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PRAGMA page_size = 1024;
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PRAGMA auto_vacuum = 0;
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PRAGMA synchronous = NORMAL;
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CREATE TABLE t1(a PRIMARY KEY, b);
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INSERT INTO t1 VALUES(1, 'one');
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INSERT INTO t1 VALUES(2, 'two');
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INSERT INTO t1 VALUES(3, 'three');
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INSERT INTO t1 VALUES(5, 'five');
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PRAGMA journal_mode = WAL;
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INSERT INTO t1 VALUES(8, 'eight');
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INSERT INTO t1 VALUES(13, 'thirteen');
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INSERT INTO t1 VALUES(21, 'twentyone');
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}
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forcecopy test.db test2.db
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forcecopy test.db-wal test2.db-wal
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db close
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list [file size test2.db] [file size test2.db-wal]
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} [list [expr 1024*3] [wal_file_size 6 1024]]
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# Verify that the checksums are valid for all frames and that they
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# are calculated by interpreting data in native byte-order.
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#
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for {set f 1} {$f <= 6} {incr f} {
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do_test walcksum-1.$endian.2.$f {
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log_checksum_verify test2.db-wal $f $native
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} 1
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}
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# Replace all checksums in the current WAL file with $endian versions.
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# Then check that it is still possible to recover and read the database.
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#
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log_checksum_writemagic test2.db-wal $endian
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for {set f 1} {$f <= 6} {incr f} {
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do_test walcksum-1.$endian.3.$f {
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log_checksum_write test2.db-wal $f $endian
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log_checksum_verify test2.db-wal $f $endian
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} {1}
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}
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do_test walcksum-1.$endian.4.1 {
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forcecopy test2.db test.db
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forcecopy test2.db-wal test.db-wal
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sqlite3 db test.db
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execsql { SELECT a FROM t1 }
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} {1 2 3 5 8 13 21}
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# Following recovery, any frames written to the log should use the same
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# endianness as the existing frames. Check that this is the case.
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#
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do_test walcksum-1.$endian.5.0 {
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execsql {
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PRAGMA synchronous = NORMAL;
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INSERT INTO t1 VALUES(34, 'thirtyfour');
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}
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list [file size test.db] [file size test.db-wal]
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} [list [expr 1024*3] [wal_file_size 8 1024]]
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for {set f 1} {$f <= 8} {incr f} {
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do_test walcksum-1.$endian.5.$f {
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log_checksum_verify test.db-wal $f $endian
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} {1}
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}
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# Now connect a second connection to the database. Check that this one
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# (not the one that did recovery) also appends frames to the log using
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# the same endianness for checksums as the existing frames.
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#
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do_test walcksum-1.$endian.6 {
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sqlite3 db2 test.db
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execsql {
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PRAGMA integrity_check;
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SELECT a FROM t1;
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} db2
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} {ok 1 2 3 5 8 13 21 34}
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do_test walcksum-1.$endian.7.0 {
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execsql {
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PRAGMA synchronous = NORMAL;
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INSERT INTO t1 VALUES(55, 'fiftyfive');
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} db2
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list [file size test.db] [file size test.db-wal]
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} [list [expr 1024*3] [wal_file_size 10 1024]]
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for {set f 1} {$f <= 10} {incr f} {
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do_test walcksum-1.$endian.7.$f {
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log_checksum_verify test.db-wal $f $endian
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} {1}
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}
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# Now that both the recoverer and non-recoverer have added frames to the
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# log file, check that it can still be recovered.
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#
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forcecopy test.db test2.db
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forcecopy test.db-wal test2.db-wal
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do_test walcksum-1.$endian.7.11 {
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sqlite3 db3 test2.db
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execsql {
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PRAGMA integrity_check;
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SELECT a FROM t1;
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} db3
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} {ok 1 2 3 5 8 13 21 34 55}
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db3 close
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# Run a checkpoint on the database file. Then, check that any frames written
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# to the start of the log use native byte-order checksums.
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#
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do_test walcksum-1.$endian.8.1 {
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execsql {
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PRAGMA wal_checkpoint;
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INSERT INTO t1 VALUES(89, 'eightynine');
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}
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log_checksum_verify test.db-wal 1 $native
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} {1}
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do_test walcksum-1.$endian.8.2 {
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log_checksum_verify test.db-wal 2 $native
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} {1}
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do_test walcksum-1.$endian.8.3 {
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log_checksum_verify test.db-wal 3 $native
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} {0}
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do_test walcksum-1.$endian.9 {
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execsql {
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PRAGMA integrity_check;
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SELECT a FROM t1;
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} db2
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} {ok 1 2 3 5 8 13 21 34 55 89}
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catch { db close }
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catch { db2 close }
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}
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#-------------------------------------------------------------------------
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# Test case walcksum-2.* tests that if a statement transaction is rolled
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# back after frames are written to the WAL, and then (after writing some
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# more) the outer transaction is committed, the WAL file is still correctly
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# formatted (and can be recovered by a second process if required).
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#
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do_test walcksum-2.1 {
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forcedelete test.db test.db-wal test.db-journal
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sqlite3 db test.db
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execsql {
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PRAGMA synchronous = NORMAL;
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PRAGMA page_size = 1024;
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PRAGMA journal_mode = WAL;
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PRAGMA cache_size = 10;
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CREATE TABLE t1(x PRIMARY KEY);
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PRAGMA wal_checkpoint;
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INSERT INTO t1 VALUES(randomblob(800));
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BEGIN;
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 2 */
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 4 */
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 8 */
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 16 */
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SAVEPOINT one;
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 32 */
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 64 */
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 128 */
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 256 */
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ROLLBACK TO one;
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 32 */
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 64 */
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 128 */
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INSERT INTO t1 SELECT randomblob(800) FROM t1; /* 256 */
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COMMIT;
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}
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forcecopy test.db test2.db
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forcecopy test.db-wal test2.db-wal
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sqlite3 db2 test2.db
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execsql {
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PRAGMA integrity_check;
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SELECT count(*) FROM t1;
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} db2
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} {ok 256}
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catch { db close }
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catch { db2 close }
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finish_test
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