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# 2008 July 9
#
# 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.
#
# This file implements tests to make sure SQLite does not crash or
# segfault if it sees a corrupt database file. It specifically focuses
# on corrupt pointer map pages.
#
# $Id: corrupt8.test,v 1.2 2008/07/11 03:34:10 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# Do not use a codec for tests in this file, as the database file is
# manipulated directly using tcl scripts (using the [hexio_write] command).
#
do_not_use_codec
# These tests deal with corrupt database files
#
database_may_be_corrupt
# We must have the page_size pragma for these tests to work.
#
ifcapable !pager_pragmas||!autovacuum {
finish_test
return
}
# Create a database to work with.
#
do_test corrupt8-1.1 {
execsql {
PRAGMA auto_vacuum=1;
PRAGMA page_size=1024;
CREATE TABLE t1(x);
INSERT INTO t1(x) VALUES(1);
INSERT INTO t1(x) VALUES(2);
INSERT INTO t1(x) SELECT x+2 FROM t1;
INSERT INTO t1(x) SELECT x+4 FROM t1;
INSERT INTO t1(x) SELECT x+8 FROM t1;
INSERT INTO t1(x) SELECT x+16 FROM t1;
INSERT INTO t1(x) SELECT x+32 FROM t1;
INSERT INTO t1(x) SELECT x+64 FROM t1;
INSERT INTO t1(x) SELECT x+128 FROM t1;
INSERT INTO t1(x) SELECT x+256 FROM t1;
CREATE TABLE t2(a,b);
INSERT INTO t2 SELECT x, x*x FROM t1;
}
expr {[file size test.db]>1024*12}
} {1}
integrity_check corrupt8-1.2
# Loop through each ptrmap entry. Corrupt the entry and make sure the
# corruption is detected by the integrity_check.
#
for {set i 1024} {$i<2048} {incr i 5} {
set oldval [hexio_read test.db $i 1]
if {$oldval==0} break
hexio_write test.db $i 00
do_test corrupt8-2.$i.0 {
db close
sqlite3 db test.db
set x [db eval {PRAGMA integrity_check}]
expr {$x!="ok"}
} {1}
for {set k 1} {$k<=5} {incr k} {
if {$k==$oldval} continue
hexio_write test.db $i 0$k
do_test corrupt8-2.$i.$k {
db close
sqlite3 db test.db
set x [db eval {PRAGMA integrity_check}]
expr {$x!="ok"}
} {1}
}
hexio_write test.db $i 06
do_test corrupt8-2.$i.6 {
db close
sqlite3 db test.db
set x [db eval {PRAGMA integrity_check}]
expr {$x!="ok"}
} {1}
hexio_write test.db $i $oldval
if {$oldval>2} {
set i2 [expr {$i+1+$i%4}]
set oldval [hexio_read test.db $i2 1]
hexio_write test.db $i2 [format %02x [expr {($oldval+1)&0xff}]]
do_test corrupt8-2.$i.7 {
db close
sqlite3 db test.db
set x [db eval {PRAGMA integrity_check}]
expr {$x!="ok"}
} {1}
hexio_write test.db $i2 $oldval
}
}
finish_test
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