3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #***********************************************************************
11 # This file implements regression tests for SQLite library.
13 # This file implements tests to make sure SQLite does not crash or
14 # segfault if it sees a corrupt database file.
16 # $Id: corrupt4.test,v 1.1 2007/09/07 14:32:07 drh Exp $
18 set testdir [file dirname $argv0]
19 source $testdir/tester.tcl
21 # Do not use a codec for tests in this file, as the database file is
22 # manipulated directly using tcl scripts (using the [hexio_write] command).
26 # These tests deal with corrupt database files
28 database_may_be_corrupt
30 # We must have the page_size pragma for these tests to work.
32 ifcapable !pager_pragmas {
37 # Create a database with a freelist containing at least two pages.
39 do_test corrupt4-1.1 {
40 set bigstring [string repeat 0123456789 200]
42 PRAGMA auto_vacuum=OFF;
43 PRAGMA page_size=1024;
45 INSERT INTO t1 VALUES($bigstring);
47 INSERT INTO t2 VALUES(1);
53 # Verify that there are two pages on the freelist.
55 do_test corrupt4-1.2 {
56 execsql {PRAGMA freelist_count}
59 # Get the page number for the trunk of the freelist.
61 set trunkpgno [hexio_get_int [hexio_read test.db 32 4]]
62 set baseaddr [expr {($trunkpgno-1)*1024}]
64 # Verify that the trunk of the freelist has exactly one
67 do_test corrupt4-1.3 {
68 hexio_get_int [hexio_read test.db [expr {$::baseaddr+4}] 4]
71 # Insert a negative number as the number of leaves on the trunk.
72 # Then try to add a new element to the freelist.
74 do_test corrupt4-1.4 {
75 hexio_write test.db [expr {$::baseaddr+4}] [hexio_render_int32 -100000000]
81 } {1 {database disk image is malformed}}