305 lines
8.5 KiB
Plaintext
305 lines
8.5 KiB
Plaintext
# 2007 March 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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# This file implements regression tests for SQLite library.
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#
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# $Id: exclusive2.test,v 1.10 2008/11/27 02:22:11 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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ifcapable {!pager_pragmas} {
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finish_test
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return
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}
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# This module does not work right if the cache spills at unexpected
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# moments. So disable the soft-heap-limit.
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#
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sqlite3_soft_heap_limit 0
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proc pagerChangeCounter {filename new {fd ""}} {
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if {$fd==""} {
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set fd [open $filename RDWR]
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fconfigure $fd -translation binary -encoding binary
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set needClose 1
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} else {
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set needClose 0
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}
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if {$new ne ""} {
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seek $fd 24
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set a [expr {($new&0xFF000000)>>24}]
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set b [expr {($new&0x00FF0000)>>16}]
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set c [expr {($new&0x0000FF00)>>8}]
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set d [expr {($new&0x000000FF)}]
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puts -nonewline $fd [binary format cccc $a $b $c $d]
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flush $fd
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}
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seek $fd 24
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foreach {a b c d} [list 0 0 0 0] {}
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binary scan [read $fd 4] cccc a b c d
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set ret [expr ($a&0x000000FF)<<24]
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incr ret [expr ($b&0x000000FF)<<16]
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incr ret [expr ($c&0x000000FF)<<8]
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incr ret [expr ($d&0x000000FF)<<0]
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if {$needClose} {close $fd}
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return $ret
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}
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proc readPagerChangeCounter {filename} {
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set fd [open $filename RDONLY]
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fconfigure $fd -translation binary -encoding binary
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seek $fd 24
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foreach {a b c d} [list 0 0 0 0] {}
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binary scan [read $fd 4] cccc a b c d
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set ret [expr ($a&0x000000FF)<<24]
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incr ret [expr ($b&0x000000FF)<<16]
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incr ret [expr ($c&0x000000FF)<<8]
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incr ret [expr ($d&0x000000FF)<<0]
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close $fd
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return $ret
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}
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proc t1sig {{db db}} {
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execsql {SELECT count(*), md5sum(a) FROM t1} $db
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}
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do_test exclusive2-1.0 {
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readPagerChangeCounter test.db
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} {0}
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#-----------------------------------------------------------------------
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# The following tests - exclusive2-1.X - check that:
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#
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# 1-3: Build a database with connection 1, calculate a signature.
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# 4-9: Modify the database using a second connection in a way that
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# does not modify the freelist, then reset the pager change-counter
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# to the value it had before the modifications.
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# 8: Check that using the first connection, the database signature
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# is still the same. This is because it uses the in-memory cache.
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# It can't tell the db has changed because we reset the change-counter.
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# 9: Increment the change-counter.
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# 10: Ensure that the first connection now sees the updated database. It
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# sees the change-counter has been incremented and discards the
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# invalid in-memory cache.
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#
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# This will only work if the database cache is large enough to hold
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# the entire database. In the case of 1024 byte pages, this means
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# the cache size must be at least 17. Otherwise, some pages will be
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# loaded from the database file in step 8.
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#
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do_test exclusive2-1.1 {
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execsql {
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BEGIN;
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CREATE TABLE t1(a, b);
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INSERT INTO t1(a) VALUES(randstr(10, 400));
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INSERT INTO t1(a) VALUES(randstr(10, 400));
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INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
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INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
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INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
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INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
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INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
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COMMIT;
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SELECT count(*) FROM t1;
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}
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} {64}
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do_test exclusive2-1.2.1 {
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# Make sure the pager cache is large enough to store the
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# entire database.
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set nPage [expr [file size test.db]/1024]
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if {$::SQLITE_DEFAULT_CACHE_SIZE < $nPage} {
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execsql "PRAGMA cache_size = $nPage"
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}
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expr {[execsql {PRAGMA cache_size}] >= $nPage}
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} {1}
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do_test exclusive2-1.2 {
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set ::sig [t1sig]
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readPagerChangeCounter test.db
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} {1}
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do_test exclusive2-1.3 {
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t1sig
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} $::sig
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do_test exclusive2-1.4 {
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sqlite3 db2 test.db
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t1sig db2
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} $::sig
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do_test exclusive2-1.5 {
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execsql {
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UPDATE t1 SET b=a, a=NULL;
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} db2
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expr {[t1sig db2] eq $::sig}
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} 0
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do_test exclusive2-1.6 {
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readPagerChangeCounter test.db
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} {2}
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do_test exclusive2-1.7 {
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pagerChangeCounter test.db 1
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} {1}
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do_test exclusive2-1.9 {
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t1sig
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expr {[t1sig] eq $::sig}
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} {1}
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do_test exclusive2-1.10 {
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pagerChangeCounter test.db 2
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} {2}
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do_test exclusive2-1.11 {
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expr {[t1sig] eq $::sig}
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} {0}
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#--------------------------------------------------------------------
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# These tests - exclusive2-2.X - are similar to exclusive2-1.X,
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# except that they are run with locking_mode=EXCLUSIVE.
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#
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# 1-3: Build a database with exclusive-access connection 1,
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# calculate a signature.
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# 4: Corrupt the database by writing 10000 bytes of garbage
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# starting at the beginning of page 2. Check that connection 1
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# still works. It should be accessing the in-memory cache.
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# 5-6: Modify the dataase change-counter. Connection 1 still works
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# entirely from in-memory cache, because it doesn't check the
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# change-counter.
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# 7-8 Set the locking-mode back to normal. After the db is unlocked,
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# SQLite detects the modified change-counter and discards the
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# in-memory cache. Then it finds the corruption caused in step 4....
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#
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# As above, this test is only applicable if the pager cache is
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# large enough to hold the entire database. With 1024 byte pages,
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# this means 19 pages. We also need to disable the soft-heap-limit
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# to prevent memory-induced cache spills.
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#
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do_test exclusive2-2.1 {
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execsql {PRAGMA cache_size=1000;}
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execsql {PRAGMA locking_mode = exclusive;}
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execsql {
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BEGIN;
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DELETE FROM t1;
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INSERT INTO t1(a) VALUES(randstr(10, 400));
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INSERT INTO t1(a) VALUES(randstr(10, 400));
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INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
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INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
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INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
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INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
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INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
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COMMIT;
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SELECT count(*) FROM t1;
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}
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} {64}
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do_test exclusive2-2.2.1 {
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# Make sure the pager cache is large enough to store the
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# entire database.
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set nPage [expr [file size test.db]/1024]
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if {$::SQLITE_DEFAULT_CACHE_SIZE < $nPage} {
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execsql "PRAGMA cache_size = $nPage"
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}
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expr {[execsql {PRAGMA cache_size}] >= $nPage}
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} {1}
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do_test exclusive2-2.2 {
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set ::sig [t1sig]
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readPagerChangeCounter test.db
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} {3}
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do_test exclusive2-2.3 {
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t1sig
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} $::sig
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do_test exclusive2-2.4 {
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set ::fd [open test.db RDWR]
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fconfigure $::fd -translation binary
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seek $::fd 1024
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puts -nonewline $::fd [string repeat [binary format c 0] 10000]
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flush $::fd
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t1sig
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} $::sig
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do_test exclusive2-2.5 {
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pagerChangeCounter test.db 5 $::fd
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} {5}
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do_test exclusive2-2.6 {
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t1sig
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} $::sig
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do_test exclusive2-2.7 {
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execsql {PRAGMA locking_mode = normal}
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t1sig
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} $::sig
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do_test exclusive2-2.8 {
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set rc [catch {t1sig} msg]
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list $rc $msg
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} {1 {database disk image is malformed}}
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#--------------------------------------------------------------------
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# These tests - exclusive2-3.X - verify that the pager change-counter
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# is only incremented by the first change when in exclusive access
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# mode. In normal mode, the change-counter is incremented once
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# per write-transaction.
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#
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db close
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db2 close
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catch {close $::fd}
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file delete -force test.db
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file delete -force test.db-journal
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do_test exclusive2-3.0 {
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sqlite3 db test.db
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execsql {
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BEGIN;
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CREATE TABLE t1(a UNIQUE);
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INSERT INTO t1 VALUES(randstr(10, 400));
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INSERT INTO t1 VALUES(randstr(10, 400));
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COMMIT;
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}
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readPagerChangeCounter test.db
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} {1}
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do_test exclusive2-3.1 {
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execsql {
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INSERT INTO t1 VALUES(randstr(10, 400));
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}
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readPagerChangeCounter test.db
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} {2}
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do_test exclusive2-3.2 {
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execsql {
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INSERT INTO t1 VALUES(randstr(10, 400));
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}
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readPagerChangeCounter test.db
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} {3}
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do_test exclusive2-3.3 {
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execsql {
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PRAGMA locking_mode = exclusive;
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INSERT INTO t1 VALUES(randstr(10, 400));
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}
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readPagerChangeCounter test.db
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} {4}
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do_test exclusive2-3.4 {
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execsql {
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INSERT INTO t1 VALUES(randstr(10, 400));
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}
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readPagerChangeCounter test.db
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} {4}
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do_test exclusive2-3.5 {
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execsql {
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PRAGMA locking_mode = normal;
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INSERT INTO t1 VALUES(randstr(10, 400));
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}
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readPagerChangeCounter test.db
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} {4}
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do_test exclusive2-3.6 {
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execsql {
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INSERT INTO t1 VALUES(randstr(10, 400));
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}
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readPagerChangeCounter test.db
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} {5}
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sqlite3_soft_heap_limit $soft_limit
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finish_test
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