09fe614372
always well-formed. Use this during testing to enable assert() statements that prove conditions that are always true for well-formed databases. FossilOrigin-Name: 15e4f63d1f3cbcd0aa789fd3e460cd6e4d3338f9
416 lines
11 KiB
Plaintext
416 lines
11 KiB
Plaintext
# 2004 August 30
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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 creates a base
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# data base file, then tests that single byte corruptions in
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# increasingly larger quantities are handled gracefully.
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#
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# $Id: corruptC.test,v 1.14 2009/07/11 06:55:34 danielk1977 Exp $
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catch {forcedelete test.db test.db-journal test.bu}
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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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# These tests deal with corrupt database files
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#
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database_may_be_corrupt
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# Construct a compact, dense database for testing.
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#
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do_test corruptC-1.1 {
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execsql {
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PRAGMA auto_vacuum = 0;
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PRAGMA legacy_file_format=1;
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BEGIN;
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CREATE TABLE t1(x,y);
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INSERT INTO t1 VALUES(1,1);
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INSERT OR IGNORE INTO t1 SELECT x*2,y FROM t1;
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INSERT OR IGNORE INTO t1 SELECT x*3,y FROM t1;
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INSERT OR IGNORE INTO t1 SELECT x*5,y FROM t1;
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INSERT OR IGNORE INTO t1 SELECT x*7,y FROM t1;
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INSERT OR IGNORE INTO t1 SELECT x*11,y FROM t1;
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INSERT OR IGNORE INTO t1 SELECT x*13,y FROM t1;
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CREATE INDEX t1i1 ON t1(x);
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CREATE TABLE t2 AS SELECT x,2 as y FROM t1 WHERE rowid%5!=0;
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COMMIT;
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}
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} {}
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ifcapable {integrityck} {
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integrity_check corruptC-1.2
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}
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# Generate random integer
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#
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proc random {range} {
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return [expr {round(rand()*$range)}]
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}
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# Setup for the tests. Make a backup copy of the good database in test.bu.
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#
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db close
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forcecopy test.db test.bu
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sqlite3 db test.db
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set fsize [file size test.db]
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# Set a quasi-random random seed.
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if {[info exists ::G(issoak)]} {
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# If we are doing SOAK tests, we want a different
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# random seed for each run. Ideally we would like
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# to use [clock clicks] or something like that here.
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set qseed [file mtime test.db]
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} else {
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# If we are not doing soak tests,
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# make it repeatable.
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set qseed 0
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}
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expr srand($qseed)
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#
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# First test some specific corruption tests found from earlier runs
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# with specific seeds.
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#
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# test that a corrupt content offset size is handled (seed 5577)
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do_test corruptC-2.1 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 2053 [format %02x 0x04]
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sqlite3 db test.db
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catchsql {PRAGMA integrity_check}
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} {1 {database disk image is malformed}}
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# test that a corrupt content offset size is handled (seed 5649)
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do_test corruptC-2.2 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 27 [format %02x 0x08]
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hexio_write test.db 233 [format %02x 0x6a]
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hexio_write test.db 328 [format %02x 0x67]
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hexio_write test.db 750 [format %02x 0x1f]
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hexio_write test.db 1132 [format %02x 0x52]
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hexio_write test.db 1133 [format %02x 0x84]
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hexio_write test.db 1220 [format %02x 0x01]
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hexio_write test.db 3688 [format %02x 0xc1]
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hexio_write test.db 3714 [format %02x 0x58]
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hexio_write test.db 3746 [format %02x 0x9a]
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sqlite3 db test.db
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catchsql {UPDATE t1 SET y=1}
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} {1 {database disk image is malformed}}
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# test that a corrupt free cell size is handled (seed 13329)
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do_test corruptC-2.3 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 1094 [format %02x 0x76]
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sqlite3 db test.db
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catchsql {UPDATE t1 SET y=1}
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} {1 {database disk image is malformed}}
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# test that a corrupt free cell size is handled (seed 169571)
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do_test corruptC-2.4 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 3119 [format %02x 0xdf]
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sqlite3 db test.db
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catchsql {UPDATE t2 SET y='abcdef-uvwxyz'}
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} {1 {database disk image is malformed}}
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# test that a corrupt free cell size is handled (seed 169571)
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do_test corruptC-2.5 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 3119 [format %02x 0xdf]
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hexio_write test.db 4073 [format %02x 0xbf]
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sqlite3 db test.db
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catchsql {BEGIN; UPDATE t2 SET y='abcdef-uvwxyz'; ROLLBACK;}
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catchsql {PRAGMA integrity_check}
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} {0 {{*** in database main ***
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Page 4: btreeInitPage() returns error code 11}}}
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# {0 {{*** in database main ***
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# Corruption detected in cell 710 on page 4
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# Multiple uses for byte 661 of page 4
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# Fragmented space is 249 byte reported as 21 on page 4}}}
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# test that a corrupt free cell size is handled (seed 169595)
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do_test corruptC-2.6 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 619 [format %02x 0xe2]
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hexio_write test.db 3150 [format %02x 0xa8]
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sqlite3 db test.db
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catchsql {BEGIN; UPDATE t2 SET y='abcdef-uvwxyz'; ROLLBACK;}
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} {1 {database disk image is malformed}}
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# corruption (seed 178692)
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do_test corruptC-2.7 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 3074 [format %02x 0xa0]
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sqlite3 db test.db
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catchsql {BEGIN; UPDATE t2 SET y='abcdef-uvwxyz'; ROLLBACK;}
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} {1 {database disk image is malformed}}
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# corruption (seed 179069)
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do_test corruptC-2.8 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 1393 [format %02x 0x7d]
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hexio_write test.db 84 [format %02x 0x19]
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hexio_write test.db 3287 [format %02x 0x3b]
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hexio_write test.db 2564 [format %02x 0xed]
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hexio_write test.db 2139 [format %02x 0x55]
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sqlite3 db test.db
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catchsql {BEGIN; DELETE FROM t1 WHERE x>13; ROLLBACK;}
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} {1 {database disk image is malformed}}
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# corruption (seed 170434)
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#
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# UPDATE: Prior to 3.8.2, this used to return SQLITE_CORRUPT. It no longer
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# does. That is Ok, the point of these tests is to verify that no buffer
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# overruns or overreads can be caused by corrupt databases.
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do_test corruptC-2.9 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 2095 [format %02x 0xd6]
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sqlite3 db test.db
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catchsql {BEGIN; DELETE FROM t1 WHERE x>13; ROLLBACK;}
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} {0 {}}
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# corruption (seed 186504)
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do_test corruptC-2.10 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 3130 [format %02x 0x02]
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sqlite3 db test.db
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catchsql {BEGIN; UPDATE t2 SET y='abcdef-uvwxyz'; ROLLBACK;}
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} {1 {database disk image is malformed}}
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# corruption (seed 1589)
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do_test corruptC-2.11 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 55 [format %02x 0xa7]
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sqlite3 db test.db
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catchsql {BEGIN; CREATE TABLE t3 AS SELECT x,3 as y FROM t2 WHERE rowid%5!=0; ROLLBACK;}
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} {1 {database disk image is malformed}}
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# corruption (seed 14166)
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do_test corruptC-2.12 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 974 [format %02x 0x2e]
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sqlite3 db test.db
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catchsql {SELECT count(*) FROM sqlite_master;}
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} {1 {malformed database schema (t1i1) - corrupt database}}
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# corruption (seed 218803)
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do_test corruptC-2.13 {
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db close
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forcecopy test.bu test.db
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# insert corrupt byte(s)
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hexio_write test.db 102 [format %02x 0x12]
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sqlite3 db test.db
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catchsql {BEGIN; CREATE TABLE t3 AS SELECT x,3 as y FROM t2 WHERE rowid%5!=0; ROLLBACK;}
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} {1 {database disk image is malformed}}
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do_test corruptC-2.14 {
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db close
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forcecopy test.bu test.db
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sqlite3 db test.db
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set blob [string repeat abcdefghij 10000]
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execsql { INSERT INTO t1 VALUES (1, $blob) }
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sqlite3 db test.db
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set filesize [file size test.db]
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hexio_write test.db [expr $filesize-2048] 00000001
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catchsql {DELETE FROM t1 WHERE rowid = (SELECT max(rowid) FROM t1)}
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} {1 {database disk image is malformed}}
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# At one point this particular corrupt database was causing a buffer
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# overread. Which caused a crash in a run of all.test once.
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#
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do_test corruptC-2.15 {
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db close
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forcecopy test.bu test.db
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hexio_write test.db 986 b9
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sqlite3 db test.db
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catchsql {SELECT count(*) FROM sqlite_master;}
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} {1 {malformed database schema (t1i1) - no such table: main.t1}}
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#
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# Now test for a series of quasi-random seeds.
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# We loop over the entire file size and touch
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# each byte at least once.
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for {set tn 0} {$tn<$fsize} {incr tn 1} {
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# setup for test
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db close
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forcecopy test.bu test.db
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sqlite3 db test.db
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# Seek to a random location in the file, and write a random single byte
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# value. Then do various operations on the file to make sure that
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# the database engine can handle the corruption gracefully.
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#
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set last 0
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for {set i 1} {$i<=512 && !$last} {incr i 1} {
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db close
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if {$i==1} {
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# on the first corrupt value, use location $tn
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# this ensures that we touch each location in the
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# file at least once.
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set roffset $tn
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} else {
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# insert random byte at random location
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set roffset [random $fsize]
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}
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set rbyte [format %02x [random 255]]
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# You can uncomment the following to have it trace
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# exactly how it's corrupting the file. This is
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# useful for generating the "seed specific" tests
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# above.
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# set rline "$roffset $rbyte"
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# puts stdout $rline
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hexio_write test.db $roffset $rbyte
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sqlite3 db test.db
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# do a few random operations to make sure that if
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# they error, they error gracefully instead of crashing.
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do_test corruptC-3.$tn.($qseed).$i.1 {
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catchsql {SELECT count(*) FROM sqlite_master}
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set x {}
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} {}
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do_test corruptC-3.$tn.($qseed).$i.2 {
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catchsql {SELECT count(*) FROM t1}
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set x {}
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} {}
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do_test corruptC-3.$tn.($qseed).$i.3 {
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catchsql {SELECT count(*) FROM t1 WHERE x>13}
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set x {}
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} {}
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do_test corruptC-3.$tn.($qseed).$i.4 {
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catchsql {SELECT count(*) FROM t2}
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set x {}
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} {}
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do_test corruptC-3.$tn.($qseed).$i.5 {
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catchsql {SELECT count(*) FROM t2 WHERE x<13}
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set x {}
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} {}
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do_test corruptC-3.$tn.($qseed).$i.6 {
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catchsql {BEGIN; UPDATE t1 SET y=1; ROLLBACK;}
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set x {}
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} {}
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do_test corruptC-3.$tn.($qseed).$i.7 {
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catchsql {BEGIN; UPDATE t2 SET y='abcdef-uvwxyz'; ROLLBACK;}
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set x {}
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} {}
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do_test corruptC-3.$tn.($qseed).$i.8 {
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catchsql {BEGIN; DELETE FROM t1 WHERE x>13; ROLLBACK;}
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set x {}
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} {}
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do_test corruptC-3.$tn.($qseed).$i.9 {
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catchsql {BEGIN; DELETE FROM t2 WHERE x<13; ROLLBACK;}
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set x {}
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} {}
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do_test corruptC-3.$tn.($qseed).$i.10 {
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catchsql {BEGIN; CREATE TABLE t3 AS SELECT x,3 as y FROM t2 WHERE rowid%5!=0; ROLLBACK;}
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set x {}
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} {}
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# check the integrity of the database.
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# once the corruption is detected, we can stop.
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ifcapable {integrityck} {
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set res [ catchsql {PRAGMA integrity_check} ]
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set ans [lindex $res 1]
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if { [ string compare $ans "ok" ] != 0 } {
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set last -1
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}
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}
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# if we are not capable of doing an integrity check,
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# stop after corrupting 5 bytes.
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ifcapable {!integrityck} {
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if { $i > 5 } {
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set last -1
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}
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}
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# Check that no page references were leaked.
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# TBD: need to figure out why this doesn't work
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# work with ROLLBACKs...
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if {0} {
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do_test corruptC-3.$tn.($qseed).$i.11 {
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set bt [btree_from_db db]
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db_enter db
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array set stats [btree_pager_stats $bt]
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db_leave db
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set stats(ref)
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} {0}
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}
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}
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# end for i
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}
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# end for tn
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finish_test
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