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.
17 set testdir [file dirname $argv0]
18 source $testdir/tester.tcl
19 set testprefix corrupt4
21 # This module uses hard-coded offsets which do not work if the reserved_bytes
23 if {[nonzero_reserved_bytes]} {finish_test; return;}
25 # These tests deal with corrupt database files
27 database_may_be_corrupt
29 # We must have the page_size pragma for these tests to work.
31 ifcapable !pager_pragmas {
36 # Create a database with a freelist containing at least two pages.
38 do_test corrupt4-1.1 {
39 set bigstring [string repeat 0123456789 200]
41 PRAGMA auto_vacuum=OFF;
42 PRAGMA page_size=1024;
44 INSERT INTO t1 VALUES($bigstring);
46 INSERT INTO t2 VALUES(1);
52 # Verify that there are two pages on the freelist.
54 do_test corrupt4-1.2 {
55 execsql {PRAGMA freelist_count}
58 # Get the page number for the trunk of the freelist.
60 set trunkpgno [hexio_get_int [hexio_read test.db 32 4]]
61 set baseaddr [expr {($trunkpgno-1)*1024}]
63 # Verify that the trunk of the freelist has exactly one
66 do_test corrupt4-1.3 {
67 hexio_get_int [hexio_read test.db [expr {$::baseaddr+4}] 4]
70 # Insert a negative number as the number of leaves on the trunk.
71 # Then try to add a new element to the freelist.
73 do_test corrupt4-1.4 {
74 hexio_write test.db [expr {$::baseaddr+4}] [hexio_render_int32 -100000000]
80 } {1 {database disk image is malformed}}
82 #-------------------------------------------------------------------------
86 PRAGMA page_size = 512;
87 CREATE TABLE t1(a, b, c);
90 # Create a database with a schema so large that the root of the
91 # sqlite_schema table is the grandparent of its leaves.
96 for {set ii 0} {$ii<$nView} {incr ii} {
97 execsql " CREATE VIEW v$ii AS SELECT a, b, c FROM t1 "
103 proc get2byte {fd offset} {
106 binary scan $bin S val
109 proc get4byte {fd offset} {
112 binary scan $bin I val
115 proc put4byte {fd offset val} {
117 set bin [binary format I $val]
118 puts -nonewline $fd $bin
121 # Page 1 is now the grandparent of its leaves. Corrupt the database by setting
122 # the second rightmost child page number of page 1 to 1.
124 set fd [open test.db r+]
125 fconfigure $fd -encoding binary -translation binary
126 set nChild [get2byte $fd 103]
127 set offChild [get2byte $fd [expr 100+12+($nChild-2)*2]]
128 set pgnoChild [get4byte $fd $offChild]
129 put4byte $fd $offChild 1
132 if {![info exists ::G(perm:presql)]} {
135 do_catchsql_test 2.2 {
136 PRAGMA writable_schema = 1;
137 SELECT * FROM sqlite_schema;
138 } {1 {database disk image is malformed}}
142 for {set ii $nView} {$ii<$nView*2} {incr ii} {
143 execsql "INSERT INTO sqlite_master VALUES(1, 2, 3, 4, 5)"
146 } {1 {database disk image is malformed}}