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 $testdir/tester.tcl 20 21# Do not use a codec for tests in this file, as the database file is 22# manipulated directly using tcl scripts (using the [hexio_write] command). 23# 24do_not_use_codec 25 26# These tests deal with corrupt database files 27# 28database_may_be_corrupt 29 30# We must have the page_size pragma for these tests to work. 31# 32ifcapable !pager_pragmas { 33 finish_test 34 return 35} 36 37# Create a database with a freelist containing at least two pages. 38# 39do_test corrupt4-1.1 { 40 set bigstring [string repeat 0123456789 200] 41 execsql { 42 PRAGMA auto_vacuum=OFF; 43 PRAGMA page_size=1024; 44 CREATE TABLE t1(x); 45 INSERT INTO t1 VALUES($bigstring); 46 CREATE TABLE t2(y); 47 INSERT INTO t2 VALUES(1); 48 DROP TABLE t1; 49 } 50 file size test.db 51} [expr {1024*4}] 52 53# Verify that there are two pages on the freelist. 54# 55do_test corrupt4-1.2 { 56 execsql {PRAGMA freelist_count} 57} {2} 58 59# Get the page number for the trunk of the freelist. 60# 61set trunkpgno [hexio_get_int [hexio_read test.db 32 4]] 62set baseaddr [expr {($trunkpgno-1)*1024}] 63 64# Verify that the trunk of the freelist has exactly one 65# leaf. 66# 67do_test corrupt4-1.3 { 68 hexio_get_int [hexio_read test.db [expr {$::baseaddr+4}] 4] 69} {1} 70 71# Insert a negative number as the number of leaves on the trunk. 72# Then try to add a new element to the freelist. 73# 74do_test corrupt4-1.4 { 75 hexio_write test.db [expr {$::baseaddr+4}] [hexio_render_int32 -100000000] 76 db close 77 sqlite3 db test.db 78 catchsql { 79 DROP TABLE t2 80 } 81} {1 {database disk image is malformed}} 82 83finish_test 84