1# 2007 Sept 7 2# 3# The author disclaims copyright to this source code. In place of 4# a legal notice, here is a blessing: 5# 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. 9# 10#*********************************************************************** 11# This file implements regression tests for SQLite library. 12# 13# This file implements tests to make sure SQLite does not crash or 14# segfault if it sees a corrupt database file. 15# 16# $Id: corrupt4.test,v 1.1 2007/09/07 14:32:07 drh Exp $ 17 18set testdir [file dirname $argv0] 19source $testdir/tester.tcl 20 21# Do not use a codec for tests in this file, as the database file is 22# manipulated directly using tcl scripts (using the [hexio_write] command). 23# 24do_not_use_codec 25 26# We must have the page_size pragma for these tests to work. 27# 28ifcapable !pager_pragmas { 29 finish_test 30 return 31} 32 33# Create a database with a freelist containing at least two pages. 34# 35do_test corrupt4-1.1 { 36 set bigstring [string repeat 0123456789 200] 37 execsql { 38 PRAGMA auto_vacuum=OFF; 39 PRAGMA page_size=1024; 40 CREATE TABLE t1(x); 41 INSERT INTO t1 VALUES($bigstring); 42 CREATE TABLE t2(y); 43 INSERT INTO t2 VALUES(1); 44 DROP TABLE t1; 45 } 46 file size test.db 47} [expr {1024*4}] 48 49# Verify that there are two pages on the freelist. 50# 51do_test corrupt4-1.2 { 52 execsql {PRAGMA freelist_count} 53} {2} 54 55# Get the page number for the trunk of the freelist. 56# 57set trunkpgno [hexio_get_int [hexio_read test.db 32 4]] 58set baseaddr [expr {($trunkpgno-1)*1024}] 59 60# Verify that the trunk of the freelist has exactly one 61# leaf. 62# 63do_test corrupt4-1.3 { 64 hexio_get_int [hexio_read test.db [expr {$::baseaddr+4}] 4] 65} {1} 66 67# Insert a negative number as the number of leaves on the trunk. 68# Then try to add a new element to the freelist. 69# 70do_test corrupt4-1.4 { 71 hexio_write test.db [expr {$::baseaddr+4}] [hexio_render_int32 -100000000] 72 db close 73 sqlite3 db test.db 74 catchsql { 75 DROP TABLE t2 76 } 77} {1 {database disk image is malformed}} 78 79finish_test 80