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# 2008 June 11
#
# 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. It specifically focuses
# on corrupt cell offsets in a btree page.
#
# $Id: corrupt7.test,v 1.8 2009/08/10 10:18:08 danielk1977 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 simple, small database.
#
do_test corrupt7-1.1 {
execsql {
PRAGMA auto_vacuum=OFF;
PRAGMA page_size=1024;
CREATE TABLE t1(x);
INSERT INTO t1(x) VALUES(1);
INSERT INTO t1(x) VALUES(2);
INSERT INTO t1(x) SELECT x+2 FROM t1;
INSERT INTO t1(x) SELECT x+4 FROM t1;
INSERT INTO t1(x) SELECT x+8 FROM t1;
}
file size test.db
} [expr {1024*2}]
# Verify that the file format is as we expect. The page size
# should be 1024 bytes.
#
do_test corrupt7-1.2 {
hexio_get_int [hexio_read test.db 16 2]
} 1024 ;# The page size is 1024
do_test corrupt7-1.3 {
hexio_get_int [hexio_read test.db 20 1]
} 0 ;# Unused bytes per page is 0
integrity_check corrupt7-1.4
# Deliberately corrupt some of the cell offsets in the btree page
# on page 2 of the database.
#
# The error message is different depending on whether or not the
# SQLITE_ENABLE_OVERSIZE_CELL_CHECK compile-time option is engaged.
#
ifcapable oversize_cell_check {
do_test corrupt7-2.1 {
db close
hexio_write test.db 1062 FF
sqlite3 db test.db
db eval {PRAGMA integrity_check(1)}
} {{*** in database main ***
Page 2: btreeInitPage() returns error code 11}}
do_test corrupt7-2.2 {
db close
hexio_write test.db 1062 04
sqlite3 db test.db
db eval {PRAGMA integrity_check(1)}
} {{*** in database main ***
Page 2: btreeInitPage() returns error code 11}}
} else {
do_test corrupt7-2.1 {
db close
hexio_write test.db 1062 FF
sqlite3 db test.db
db eval {PRAGMA integrity_check(1)}
} {{*** in database main ***
Corruption detected in cell 15 on page 2}}
do_test corrupt7-2.2 {
db close
hexio_write test.db 1062 04
sqlite3 db test.db
db eval {PRAGMA integrity_check(1)}
} {{*** in database main ***
On tree page 2 cell 15: Rowid 0 out of order (previous was 15)}}
}
# The code path that was causing the buffer overrun that this test
# case was checking for was removed.
#
#do_test corrupt7-3.1 {
# execsql {
# DROP TABLE t1;
# CREATE TABLE t1(a, b);
# INSERT INTO t1 VALUES(1, 'one');
# INSERT INTO t1 VALUES(100, 'one hundred');
# INSERT INTO t1 VALUES(100000, 'one hundred thousand');
# CREATE INDEX i1 ON t1(b);
# }
# db close
#
# # Locate the 3rd cell in the index.
# set cell_offset [hexio_get_int [hexio_read test.db [expr 1024*2 + 12] 2]]
# incr cell_offset [expr 1024*2]
# incr cell_offset 1
#
# # This write corrupts the "header-size" field of the database record
# # stored in the index cell. At one point this was causing sqlite to
# # reference invalid memory.
# hexio_write test.db $cell_offset FFFF7F
#
# sqlite3 db test.db
# catchsql {
# SELECT b FROM t1 WHERE b > 'o' AND b < 'p';
# }
#} {1 {database disk image is malformed}}
finish_test
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