150 lines
3.6 KiB
Plaintext
150 lines
3.6 KiB
Plaintext
# 2007 Sept 7
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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# This file implements regression tests for SQLite library.
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#
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# This file implements tests to make sure SQLite does not crash or
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# segfault if it sees a corrupt database file.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix corrupt4
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# This module uses hard-coded offsets which do not work if the reserved_bytes
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# value is nonzero.
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if {[nonzero_reserved_bytes]} {finish_test; return;}
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# These tests deal with corrupt database files
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#
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database_may_be_corrupt
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# We must have the page_size pragma for these tests to work.
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#
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ifcapable !pager_pragmas {
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finish_test
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return
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}
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# Create a database with a freelist containing at least two pages.
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#
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do_test corrupt4-1.1 {
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set bigstring [string repeat 0123456789 200]
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execsql {
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PRAGMA auto_vacuum=OFF;
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PRAGMA page_size=1024;
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CREATE TABLE t1(x);
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INSERT INTO t1 VALUES($bigstring);
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CREATE TABLE t2(y);
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INSERT INTO t2 VALUES(1);
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DROP TABLE t1;
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}
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file size test.db
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} [expr {1024*4}]
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# Verify that there are two pages on the freelist.
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#
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do_test corrupt4-1.2 {
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execsql {PRAGMA freelist_count}
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} {2}
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# Get the page number for the trunk of the freelist.
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#
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set trunkpgno [hexio_get_int [hexio_read test.db 32 4]]
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set baseaddr [expr {($trunkpgno-1)*1024}]
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# Verify that the trunk of the freelist has exactly one
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# leaf.
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#
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do_test corrupt4-1.3 {
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hexio_get_int [hexio_read test.db [expr {$::baseaddr+4}] 4]
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} {1}
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# Insert a negative number as the number of leaves on the trunk.
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# Then try to add a new element to the freelist.
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#
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do_test corrupt4-1.4 {
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hexio_write test.db [expr {$::baseaddr+4}] [hexio_render_int32 -100000000]
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db close
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sqlite3 db test.db
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catchsql {
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DROP TABLE t2
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}
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} {1 {database disk image is malformed}}
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#-------------------------------------------------------------------------
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reset_db
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do_execsql_test 2.0 {
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PRAGMA page_size = 512;
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CREATE TABLE t1(a, b, c);
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}
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# Create a database with a schema so large that the root of the
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# sqlite_schema table is the grandparent of its leaves.
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#
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set nView 1000
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do_test 2.1 {
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execsql BEGIN
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for {set ii 0} {$ii<$nView} {incr ii} {
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execsql " CREATE VIEW v$ii AS SELECT a, b, c FROM t1 "
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}
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execsql COMMIT
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} {}
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db close
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proc get2byte {fd offset} {
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seek $fd $offset
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set bin [read $fd 2]
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binary scan $bin S val
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set val
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}
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proc get4byte {fd offset} {
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seek $fd $offset
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set bin [read $fd 4]
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binary scan $bin I val
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set val
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}
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proc put4byte {fd offset val} {
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seek $fd $offset
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set bin [binary format I $val]
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puts -nonewline $fd $bin
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}
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# Page 1 is now the grandparent of its leaves. Corrupt the database by setting
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# the second rightmost child page number of page 1 to 1.
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#
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set fd [open test.db r+]
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fconfigure $fd -encoding binary -translation binary
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set nChild [get2byte $fd 103]
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set offChild [get2byte $fd [expr 100+12+($nChild-2)*2]]
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set pgnoChild [get4byte $fd $offChild]
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put4byte $fd $offChild 1
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close $fd
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if {![info exists ::G(perm:presql)]} {
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sqlite3 db test.db
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do_catchsql_test 2.2 {
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PRAGMA writable_schema = 1;
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SELECT * FROM sqlite_schema;
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} {1 {database disk image is malformed}}
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do_test 2.3 {
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list [catch {
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for {set ii $nView} {$ii<$nView*2} {incr ii} {
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execsql "INSERT INTO sqlite_master VALUES(1, 2, 3, 4, 5)"
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}
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} msg] $msg
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} {1 {database disk image is malformed}}
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}
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finish_test
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