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# 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 $testdir/tester.tcl
# Do not use a codec for tests in this file, as the database file is
# manipulated directly using tcl scripts (using the [hexio_write] command).
#
do_not_use_codec
# These tests deal with corrupt database files
#
database_may_be_corrupt
# We must have the page_size pragma for these tests to work.
#
ifcapable !pager_pragmas {
finish_test
return
}
# Create a database with a freelist containing at least two pages.
#
do_test corrupt4-1.1 {
set bigstring [string repeat 0123456789 200]
execsql {
PRAGMA auto_vacuum=OFF;
PRAGMA page_size=1024;
CREATE TABLE t1(x);
INSERT INTO t1 VALUES($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
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