# 2007 Sept 7 # # 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. # # $Id: corrupt4.test,v 1.1 2007/09/07 14:32:07 drh Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl # Do not use a codec for tests in this file, as the database file is # manipulated directly using tcl scripts (using the [hexio_write] command). # do_not_use_codec # We must have the page_size pragma for these tests to work. # ifcapable !pager_pragmas { finish_test return } # Create a database with a freelist containing at least two pages. # do_test corrupt4-1.1 { set bigstring [string repeat 0123456789 200] execsql { PRAGMA auto_vacuum=OFF; PRAGMA page_size=1024; CREATE TABLE t1(x); INSERT INTO t1 VALUES($bigstring); CREATE TABLE t2(y); INSERT INTO t2 VALUES(1); DROP TABLE t1; } file size test.db } [expr {1024*4}] # Verify that there are two pages on the freelist. # do_test corrupt4-1.2 { execsql {PRAGMA freelist_count} } {2} # Get the page number for the trunk of the freelist. # set trunkpgno [hexio_get_int [hexio_read test.db 32 4]] set baseaddr [expr {($trunkpgno-1)*1024}] # Verify that the trunk of the freelist has exactly one # leaf. # do_test corrupt4-1.3 { hexio_get_int [hexio_read test.db [expr {$::baseaddr+4}] 4] } {1} # Insert a negative number as the number of leaves on the trunk. # Then try to add a new element to the freelist. # do_test corrupt4-1.4 { hexio_write test.db [expr {$::baseaddr+4}] [hexio_render_int32 -100000000] db close sqlite3 db test.db catchsql { DROP TABLE t2 } } {1 {database disk image is malformed}} finish_test