137 lines
3.7 KiB
Plaintext
137 lines
3.7 KiB
Plaintext
# 2008 July 9
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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. It specifically focuses
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# on corruption in the form of duplicate entries on the freelist.
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#
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# $Id: corrupt9.test,v 1.3 2009/06/04 02:47:04 shane Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Do not use a codec for tests in this file, as the database file is
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# manipulated directly using tcl scripts (using the [hexio_write] command).
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#
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do_not_use_codec
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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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# Return the offset to the first (trunk) page of the freelist. Return
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# zero of the freelist is empty.
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#
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proc freelist_trunk_offset {filename} {
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if {[hexio_read $filename 36 4]==0} {return 0}
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set pgno [hexio_get_int [hexio_read $filename 32 4]]
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return [expr {($pgno-1)*[hexio_get_int [hexio_read $filename 16 2]]}]
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}
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# This procedure looks at the first trunk page of the freelist and
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# corrupts that page by overwriting up to N entries with duplicates
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# of the first entry.
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#
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proc corrupt_freelist {filename N} {
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set offset [freelist_trunk_offset $filename]
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if {$offset==0} {error "Freelist is empty"}
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set cnt [hexio_get_int [hexio_read $filename [expr {$offset+4}] 4]]
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set pgno [hexio_read $filename [expr {$offset+8}] 4]
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for {set i 12} {$N>0 && $i<8+4*$cnt} {incr i 4; incr N -1} {
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hexio_write $filename [expr {$offset+$i}] $pgno
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}
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}
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# Create a database to work with. Make sure there are plenty of
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# entries on the freelist.
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#
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do_test corrupt9-1.1 {
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execsql {
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PRAGMA auto_vacuum=NONE;
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PRAGMA page_size=1024;
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CREATE TABLE t1(x);
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INSERT INTO t1(x) VALUES(1);
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INSERT INTO t1(x) VALUES(2);
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INSERT INTO t1(x) SELECT x+2 FROM t1;
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INSERT INTO t1(x) SELECT x+4 FROM t1;
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INSERT INTO t1(x) SELECT x+8 FROM t1;
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INSERT INTO t1(x) SELECT x+16 FROM t1;
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INSERT INTO t1(x) SELECT x+32 FROM t1;
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INSERT INTO t1(x) SELECT x+64 FROM t1;
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INSERT INTO t1(x) SELECT x+128 FROM t1;
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INSERT INTO t1(x) SELECT x+256 FROM t1;
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CREATE TABLE t2(a,b);
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INSERT INTO t2 SELECT x, x*x FROM t1;
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CREATE INDEX i1 ON t1(x);
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CREATE INDEX i2 ON t2(b,a);
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DROP INDEX i2;
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}
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expr {[file size test.db]>1024*24}
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} {1}
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integrity_check corrupt9-1.2
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# Corrupt the freelist by adding duplicate entries to the freelist.
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# Make sure the corruption is detected.
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#
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db close
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file copy -force test.db test.db-template
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corrupt_freelist test.db 1
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sqlite3 db test.db
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do_test corrupt9-2.1 {
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set x [db eval {PRAGMA integrity_check}]
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expr {$x!="ok"}
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} {1}
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do_test corrupt9-2.2 {
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catchsql {
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CREATE INDEX i2 ON t2(b,a);
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REINDEX;
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}
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} {1 {database disk image is malformed}}
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db close
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file copy -force test.db-template test.db
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corrupt_freelist test.db 2
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sqlite3 db test.db
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do_test corrupt9-3.1 {
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set x [db eval {PRAGMA integrity_check}]
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expr {$x!="ok"}
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} {1}
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do_test corrupt9-3.2 {
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catchsql {
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CREATE INDEX i2 ON t2(b,a);
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REINDEX;
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}
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} {1 {database disk image is malformed}}
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db close
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file copy -force test.db-template test.db
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corrupt_freelist test.db 3
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sqlite3 db test.db
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do_test corrupt9-4.1 {
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set x [db eval {PRAGMA integrity_check}]
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expr {$x!="ok"}
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} {1}
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do_test corrupt9-4.2 {
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catchsql {
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CREATE INDEX i2 ON t2(b,a);
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REINDEX;
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}
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} {1 {database disk image is malformed}}
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finish_test
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