--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/persistentstorage/sqlite3api/TEST/TclScript/exclusive2.test Fri Jan 22 11:06:30 2010 +0200
@@ -0,0 +1,303 @@
+# 2007 March 24
+#
+# The author disclaims copyright to this source code. In place of
+# a legal notice, here is a blessing:
+#
+# May you do good and not evil.
+# May you find forgiveness for yourself and forgive others.
+# May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.
+#
+# $Id: exclusive2.test,v 1.9 2008/08/22 00:25:53 aswift Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+ifcapable {!pager_pragmas} {
+ finish_test
+ return
+}
+
+# This module does not work right if the cache spills at unexpected
+# moments. So disable the soft-heap-limit.
+#
+sqlite3_soft_heap_limit 0
+
+proc pagerChangeCounter {filename new {fd ""}} {
+ if {$fd==""} {
+ set fd [open $filename RDWR]
+ fconfigure $fd -translation binary -encoding binary
+ set needClose 1
+ } else {
+ set needClose 0
+ }
+ if {$new ne ""} {
+ seek $fd 24
+ set a [expr {($new&0xFF000000)>>24}]
+ set b [expr {($new&0x00FF0000)>>16}]
+ set c [expr {($new&0x0000FF00)>>8}]
+ set d [expr {($new&0x000000FF)}]
+ puts -nonewline $fd [binary format cccc $a $b $c $d]
+ flush $fd
+ }
+
+ seek $fd 24
+ foreach {a b c d} [list 0 0 0 0] {}
+ binary scan [read $fd 4] cccc a b c d
+ set ret [expr ($a&0x000000FF)<<24]
+ incr ret [expr ($b&0x000000FF)<<16]
+ incr ret [expr ($c&0x000000FF)<<8]
+ incr ret [expr ($d&0x000000FF)<<0]
+
+ if {$needClose} {close $fd}
+ return $ret
+}
+
+proc readPagerChangeCounter {filename} {
+ set fd [open $filename RDONLY]
+ fconfigure $fd -translation binary -encoding binary
+
+ seek $fd 24
+ foreach {a b c d} [list 0 0 0 0] {}
+ binary scan [read $fd 4] cccc a b c d
+ set ret [expr ($a&0x000000FF)<<24]
+ incr ret [expr ($b&0x000000FF)<<16]
+ incr ret [expr ($c&0x000000FF)<<8]
+ incr ret [expr ($d&0x000000FF)<<0]
+
+ close $fd
+ return $ret
+}
+
+
+proc t1sig {{db db}} {
+ execsql {SELECT count(*), md5sum(a) FROM t1} $db
+}
+do_test exclusive2-1.0 {
+ readPagerChangeCounter test.db
+} {0}
+
+#-----------------------------------------------------------------------
+# The following tests - exclusive2-1.X - check that:
+#
+# 1-3: Build a database with connection 1, calculate a signature.
+# 4-9: Modify the database using a second connection in a way that
+# does not modify the freelist, then reset the pager change-counter
+# to the value it had before the modifications.
+# 8: Check that using the first connection, the database signature
+# is still the same. This is because it uses the in-memory cache.
+# It can't tell the db has changed because we reset the change-counter.
+# 9: Increment the change-counter.
+# 10: Ensure that the first connection now sees the updated database. It
+# sees the change-counter has been incremented and discards the
+# invalid in-memory cache.
+#
+# This will only work if the database cache is large enough to hold
+# the entire database. In the case of 1024 byte pages, this means
+# the cache size must be at least 17. Otherwise, some pages will be
+# loaded from the database file in step 8.
+#
+do_test exclusive2-1.1 {
+ execsql {
+ BEGIN;
+ CREATE TABLE t1(a, b);
+ INSERT INTO t1(a) VALUES(randstr(10, 400));
+ INSERT INTO t1(a) VALUES(randstr(10, 400));
+ INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
+ INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
+ INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
+ INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
+ INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
+ COMMIT;
+ SELECT count(*) FROM t1;
+ }
+} {64}
+do_test exclusive2-1.2.1 {
+ # Make sure the pager cache is large enough to store the
+ # entire database.
+ set nPage [expr [file size test.db]/1024]
+ if {$::SQLITE_DEFAULT_CACHE_SIZE < $nPage} {
+ execsql "PRAGMA cache_size = $nPage"
+ }
+ expr {[execsql {PRAGMA cache_size}] >= $nPage}
+} {1}
+do_test exclusive2-1.2 {
+ set ::sig [t1sig]
+ readPagerChangeCounter test.db
+} {1}
+do_test exclusive2-1.3 {
+ t1sig
+} $::sig
+do_test exclusive2-1.4 {
+ sqlite3 db2 test.db
+ t1sig db2
+} $::sig
+do_test exclusive2-1.5 {
+ execsql {
+ UPDATE t1 SET b=a, a=NULL;
+ } db2
+ expr {[t1sig db2] eq $::sig}
+} 0
+do_test exclusive2-1.6 {
+ readPagerChangeCounter test.db
+} {2}
+do_test exclusive2-1.7 {
+ pagerChangeCounter test.db 1
+} {1}
+do_test exclusive2-1.9 {
+ t1sig
+ expr {[t1sig] eq $::sig}
+} {1}
+do_test exclusive2-1.10 {
+ pagerChangeCounter test.db 2
+} {2}
+do_test exclusive2-1.11 {
+ expr {[t1sig] eq $::sig}
+} {0}
+
+#--------------------------------------------------------------------
+# These tests - exclusive2-2.X - are similar to exclusive2-1.X,
+# except that they are run with locking_mode=EXCLUSIVE.
+#
+# 1-3: Build a database with exclusive-access connection 1,
+# calculate a signature.
+# 4: Corrupt the database by writing 10000 bytes of garbage
+# starting at the beginning of page 2. Check that connection 1
+# still works. It should be accessing the in-memory cache.
+# 5-6: Modify the dataase change-counter. Connection 1 still works
+# entirely from in-memory cache, because it doesn't check the
+# change-counter.
+# 7-8 Set the locking-mode back to normal. After the db is unlocked,
+# SQLite detects the modified change-counter and discards the
+# in-memory cache. Then it finds the corruption caused in step 4....
+#
+# As above, this test is only applicable if the pager cache is
+# large enough to hold the entire database. With 1024 byte pages,
+# this means 19 pages. We also need to disable the soft-heap-limit
+# to prevent memory-induced cache spills.
+#
+do_test exclusive2-2.1 {
+ execsql {PRAGMA locking_mode = exclusive;}
+ execsql {
+ BEGIN;
+ DELETE FROM t1;
+ INSERT INTO t1(a) VALUES(randstr(10, 400));
+ INSERT INTO t1(a) VALUES(randstr(10, 400));
+ INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
+ INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
+ INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
+ INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
+ INSERT INTO t1(a) SELECT randstr(10, 400) FROM t1;
+ COMMIT;
+ SELECT count(*) FROM t1;
+ }
+} {64}
+do_test exclusive2-2.2.1 {
+ # Make sure the pager cache is large enough to store the
+ # entire database.
+ set nPage [expr [file size test.db]/1024]
+ if {$::SQLITE_DEFAULT_CACHE_SIZE < $nPage} {
+ execsql "PRAGMA cache_size = $nPage"
+ }
+ expr {[execsql {PRAGMA cache_size}] >= $nPage}
+} {1}
+do_test exclusive2-2.2 {
+ set ::sig [t1sig]
+ readPagerChangeCounter test.db
+} {3}
+do_test exclusive2-2.3 {
+ t1sig
+} $::sig
+
+do_test exclusive2-2.4 {
+ set ::fd [open test.db RDWR]
+ fconfigure $::fd -translation binary
+ seek $::fd 1024
+ puts -nonewline $::fd [string repeat [binary format c 0] 10000]
+ flush $::fd
+ t1sig
+} $::sig
+
+do_test exclusive2-2.5 {
+ pagerChangeCounter test.db 5 $::fd
+} {5}
+do_test exclusive2-2.6 {
+ t1sig
+} $::sig
+do_test exclusive2-2.7 {
+ execsql {PRAGMA locking_mode = normal}
+ t1sig
+} $::sig
+
+do_test exclusive2-2.8 {
+ set rc [catch {t1sig} msg]
+ list $rc $msg
+} {1 {database disk image is malformed}}
+
+#--------------------------------------------------------------------
+# These tests - exclusive2-3.X - verify that the pager change-counter
+# is only incremented by the first change when in exclusive access
+# mode. In normal mode, the change-counter is incremented once
+# per write-transaction.
+#
+
+db close
+db2 close
+catch {close $::fd}
+file delete -force test.db
+file delete -force test.db-journal
+
+do_test exclusive2-3.0 {
+ sqlite3 db test.db
+ execsql {
+ BEGIN;
+ CREATE TABLE t1(a UNIQUE);
+ INSERT INTO t1 VALUES(randstr(10, 400));
+ INSERT INTO t1 VALUES(randstr(10, 400));
+ COMMIT;
+ }
+ readPagerChangeCounter test.db
+} {1}
+do_test exclusive2-3.1 {
+ execsql {
+ INSERT INTO t1 VALUES(randstr(10, 400));
+ }
+ readPagerChangeCounter test.db
+} {2}
+do_test exclusive2-3.2 {
+ execsql {
+ INSERT INTO t1 VALUES(randstr(10, 400));
+ }
+ readPagerChangeCounter test.db
+} {3}
+do_test exclusive2-3.3 {
+ execsql {
+ PRAGMA locking_mode = exclusive;
+ INSERT INTO t1 VALUES(randstr(10, 400));
+ }
+ readPagerChangeCounter test.db
+} {4}
+do_test exclusive2-3.4 {
+ execsql {
+ INSERT INTO t1 VALUES(randstr(10, 400));
+ }
+ readPagerChangeCounter test.db
+} {4}
+do_test exclusive2-3.5 {
+ execsql {
+ PRAGMA locking_mode = normal;
+ INSERT INTO t1 VALUES(randstr(10, 400));
+ }
+ readPagerChangeCounter test.db
+} {4}
+do_test exclusive2-3.6 {
+ execsql {
+ INSERT INTO t1 VALUES(randstr(10, 400));
+ }
+ readPagerChangeCounter test.db
+} {5}
+sqlite3_soft_heap_limit $soft_limit
+
+finish_test