3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
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.
10 #***********************************************************************
11 # This file implements regression tests for SQLite library.
13 # This file implements tests to make sure SQLite does not crash or
14 # segfault if it sees a corrupt database file. It specifically focuses
15 # on loops in the B-Tree structure. A loop is formed in a B-Tree structure
16 # when there exists a page that is both an a descendent or ancestor of
19 # Also test that an SQLITE_CORRUPT error is returned if a B-Tree page
20 # contains a (corrupt) reference to a page greater than the configured
21 # maximum page number.
23 # $Id: corruptB.test,v 1.4 2009/07/21 19:25:24 danielk1977 Exp $
25 set testdir [file dirname $argv0]
26 source $testdir/tester.tcl
28 # Do not use a codec for tests in this file, as the database file is
29 # manipulated directly using tcl scripts (using the [hexio_write] command).
33 # These tests deal with corrupt database files
35 database_may_be_corrupt
38 do_test corruptB-1.1 {
40 PRAGMA auto_vacuum = 1;
42 INSERT INTO t1 VALUES(randomblob(200));
43 INSERT INTO t1 SELECT randomblob(200) FROM t1;
44 INSERT INTO t1 SELECT randomblob(200) FROM t1;
45 INSERT INTO t1 SELECT randomblob(200) FROM t1;
46 INSERT INTO t1 SELECT randomblob(200) FROM t1;
47 INSERT INTO t1 SELECT randomblob(200) FROM t1;
49 expr {[file size test.db] > (1024*9)}
51 integrity_check corruptB-1.2
53 forcecopy test.db bak.db
55 # Set the right-child of a B-Tree rootpage to refer to the root-page itself.
57 do_test corruptB-1.3.1 {
58 set ::root [execsql {SELECT rootpage FROM sqlite_master}]
59 set ::offset [expr {($::root-1)*1024}]
60 hexio_write test.db [expr $offset+8] [hexio_render_int32 $::root]
62 do_test corruptB-1.3.2 {
64 catchsql { SELECT * FROM t1 }
65 } {1 {database disk image is malformed}}
67 # Set the left-child of a cell in a B-Tree rootpage to refer to the
70 do_test corruptB-1.4.1 {
72 forcecopy bak.db test.db
73 set cell_offset [hexio_get_int [hexio_read test.db [expr $offset+12] 2]]
74 hexio_write test.db [expr $offset+$cell_offset] [hexio_render_int32 $::root]
76 do_test corruptB-1.4.2 {
78 catchsql { SELECT * FROM t1 }
79 } {1 {database disk image is malformed}}
81 # Now grow the table B-Tree so that it is more than 2 levels high.
83 do_test corruptB-1.5.1 {
85 forcecopy bak.db test.db
88 INSERT INTO t1 SELECT randomblob(200) FROM t1;
89 INSERT INTO t1 SELECT randomblob(200) FROM t1;
90 INSERT INTO t1 SELECT randomblob(200) FROM t1;
91 INSERT INTO t1 SELECT randomblob(200) FROM t1;
92 INSERT INTO t1 SELECT randomblob(200) FROM t1;
93 INSERT INTO t1 SELECT randomblob(200) FROM t1;
94 INSERT INTO t1 SELECT randomblob(200) FROM t1;
98 forcecopy test.db bak.db
100 # Set the right-child pointer of the right-child of the root page to point
101 # back to the root page.
103 do_test corruptB-1.6.1 {
105 set iRightChild [hexio_get_int [hexio_read test.db [expr $offset+8] 4]]
106 set c_offset [expr ($iRightChild-1)*1024]
107 hexio_write test.db [expr $c_offset+8] [hexio_render_int32 $::root]
109 do_test corruptB-1.6.2 {
111 catchsql { SELECT * FROM t1 }
112 } {1 {database disk image is malformed}}
114 # Set the left-child pointer of a cell of the right-child of the root page to
115 # point back to the root page.
117 do_test corruptB-1.7.1 {
119 forcecopy bak.db test.db
120 set cell_offset [hexio_get_int [hexio_read test.db [expr $c_offset+12] 2]]
121 hexio_write test.db [expr $c_offset+$cell_offset] [hexio_render_int32 $::root]
123 do_test corruptB-1.7.2 {
125 catchsql { SELECT * FROM t1 }
126 } {1 {database disk image is malformed}}
128 do_test corruptB-1.8.1 {
130 set cell_offset [hexio_get_int [hexio_read test.db [expr $offset+12] 2]]
132 hexio_get_int [hexio_read test.db [expr $offset+$cell_offset] 4]
134 set c_offset [expr ($iLeftChild-1)*1024]
135 hexio_write test.db [expr $c_offset+8] [hexio_render_int32 $::root]
137 do_test corruptB-1.8.2 {
139 catchsql { SELECT * FROM t1 }
140 } {1 {database disk image is malformed}}
142 # Set the left-child pointer of a cell of the right-child of the root page to
143 # point back to the root page.
145 do_test corruptB-1.9.1 {
147 forcecopy bak.db test.db
148 set cell_offset [hexio_get_int [hexio_read test.db [expr $c_offset+12] 2]]
149 hexio_write test.db [expr $c_offset+$cell_offset] [hexio_render_int32 $::root]
151 do_test corruptB-1.9.2 {
153 catchsql { SELECT * FROM t1 }
154 } {1 {database disk image is malformed}}
156 #---------------------------------------------------------------------------
158 do_test corruptB-2.1.1 {
160 forcecopy bak.db test.db
161 hexio_write test.db [expr $offset+8] [hexio_render_int32 0x6FFFFFFF]
163 do_test corruptB-2.1.2 {
165 catchsql { SELECT * FROM t1 }
166 } {1 {database disk image is malformed}}
168 #---------------------------------------------------------------------------
170 # Corrupt the header-size field of a database record.
172 do_test corruptB-3.1.1 {
174 forcecopy bak.db test.db
176 set v [string repeat abcdefghij 200]
179 INSERT INTO t2 VALUES($v);
181 set t2_root [execsql {SELECT rootpage FROM sqlite_master WHERE name = 't2'}]
182 set iPage [expr ($t2_root-1)*1024]
183 set iCellarray [expr $iPage + 8]
184 set iRecord [hexio_get_int [hexio_read test.db $iCellarray 2]]
186 hexio_write test.db [expr $iPage+$iRecord+3] FF00
188 do_test corruptB-3.1.2 {
190 catchsql { SELECT * FROM t2 }
191 } {1 {database disk image is malformed}}