403 lines
12 KiB
Plaintext
403 lines
12 KiB
Plaintext
# 2009 January 8
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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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#
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# This test verifies a couple of specific potential data corruption
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# scenarios involving crashes or power failures.
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#
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# Later: Also, some other specific scenarios required for coverage
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# testing that do not lead to corruption.
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#
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# $Id: crash8.test,v 1.4 2009/01/11 00:44:48 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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ifcapable !crashtest {
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finish_test
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return
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}
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do_test crash8-1.1 {
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execsql {
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PRAGMA auto_vacuum=OFF;
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CREATE TABLE t1(a, b);
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CREATE INDEX i1 ON t1(a, b);
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INSERT INTO t1 VALUES(1, randstr(1000,1000));
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INSERT INTO t1 VALUES(2, randstr(1000,1000));
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INSERT INTO t1 VALUES(3, randstr(1000,1000));
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INSERT INTO t1 VALUES(4, randstr(1000,1000));
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INSERT INTO t1 VALUES(5, randstr(1000,1000));
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INSERT INTO t1 VALUES(6, randstr(1000,1000));
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CREATE TABLE t2(a, b);
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CREATE TABLE t3(a, b);
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CREATE TABLE t4(a, b);
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CREATE TABLE t5(a, b);
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CREATE TABLE t6(a, b);
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CREATE TABLE t7(a, b);
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CREATE TABLE t8(a, b);
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CREATE TABLE t9(a, b);
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CREATE TABLE t10(a, b);
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PRAGMA integrity_check
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}
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} {ok}
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# Potential corruption scenario 1. A second process opens the database
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# and modifies a large portion of it. It then opens a second transaction
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# and modifies a small part of the database, but crashes before it commits
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# the transaction.
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#
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# When the first process accessed the database again, it was rolling back
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# the aborted transaction, but was not purging its in-memory cache (which
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# was loaded before the second process made its first, successful,
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# modification). Producing an inconsistent cache.
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#
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do_test crash8-1.2 {
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crashsql -delay 2 -file test.db {
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PRAGMA cache_size = 10;
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UPDATE t1 SET b = randstr(1000,1000);
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INSERT INTO t9 VALUES(1, 2);
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}
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} {1 {child process exited abnormally}}
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do_test crash8-1.3 {
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execsql {PRAGMA integrity_check}
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} {ok}
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# Potential corruption scenario 2. The second process, operating in
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# persistent-journal mode, makes a large change to the database file
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# with a small in-memory cache. Such that more than one journal-header
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# was written to the file. It then opens a second transaction and makes
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# a smaller change that requires only a single journal-header to be
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# written to the journal file. The second change is such that the
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# journal content written to the persistent journal file exactly overwrites
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# the first journal-header and set of subsequent records written by the
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# first, successful, change. The second process crashes before it can
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# commit its second change.
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#
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# When the first process accessed the database again, it was rolling back
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# the second aborted transaction, then continuing to rollback the second
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# and subsequent journal-headers written by the first, successful, change.
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# Database corruption.
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#
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do_test crash8.2.1 {
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crashsql -delay 2 -file test.db {
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PRAGMA journal_mode = persist;
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PRAGMA cache_size = 10;
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UPDATE t1 SET b = randstr(1000,1000);
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PRAGMA cache_size = 100;
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BEGIN;
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INSERT INTO t2 VALUES('a', 'b');
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INSERT INTO t3 VALUES('a', 'b');
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INSERT INTO t4 VALUES('a', 'b');
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INSERT INTO t5 VALUES('a', 'b');
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INSERT INTO t6 VALUES('a', 'b');
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INSERT INTO t7 VALUES('a', 'b');
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INSERT INTO t8 VALUES('a', 'b');
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INSERT INTO t9 VALUES('a', 'b');
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INSERT INTO t10 VALUES('a', 'b');
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COMMIT;
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}
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} {1 {child process exited abnormally}}
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do_test crash8-2.3 {
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execsql {PRAGMA integrity_check}
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} {ok}
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proc read_file {zFile} {
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set fd [open $zFile]
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fconfigure $fd -translation binary
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set zData [read $fd]
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close $fd
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return $zData
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}
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proc write_file {zFile zData} {
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set fd [open $zFile w]
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fconfigure $fd -translation binary
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puts -nonewline $fd $zData
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close $fd
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}
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# The following tests check that SQLite will not roll back a hot-journal
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# file if the sector-size field in the first journal file header is
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# suspect. Definition of suspect:
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#
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# a) Not a power of 2, or (crash8-3.5)
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# b) Greater than 0x01000000 (16MB), or (crash8-3.6)
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# c) Less than 512. (crash8-3.7)
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#
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# Also test that SQLite will not rollback a hot-journal file with a
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# suspect page-size. In this case "suspect" means:
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#
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# a) Not a power of 2, or
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# b) Less than 512, or
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# c) Greater than SQLITE_MAX_PAGE_SIZE
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#
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do_test crash8-3.1 {
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list [file exists test.db-joural] [file exists test.db]
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} {0 1}
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do_test crash8-3.2 {
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execsql {
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PRAGMA synchronous = off;
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BEGIN;
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DELETE FROM t1;
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SELECT count(*) FROM t1;
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}
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} {0}
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do_test crash8-3.3 {
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set zJournal [read_file test.db-journal]
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execsql {
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COMMIT;
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SELECT count(*) FROM t1;
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}
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} {0}
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do_test crash8-3.4 {
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binary scan [string range $zJournal 20 23] I nSector
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set nSector
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} {512}
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do_test crash8-3.5 {
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set zJournal2 [string replace $zJournal 20 23 [binary format I 513]]
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write_file test.db-journal $zJournal2
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execsql {
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SELECT count(*) FROM t1;
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PRAGMA integrity_check
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}
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} {0 ok}
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do_test crash8-3.6 {
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set zJournal2 [string replace $zJournal 20 23 [binary format I 0x2000000]]
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write_file test.db-journal $zJournal2
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execsql {
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SELECT count(*) FROM t1;
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PRAGMA integrity_check
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}
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} {0 ok}
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do_test crash8-3.7 {
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set zJournal2 [string replace $zJournal 20 23 [binary format I 256]]
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write_file test.db-journal $zJournal2
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execsql {
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SELECT count(*) FROM t1;
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PRAGMA integrity_check
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}
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} {0 ok}
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do_test crash8-3.8 {
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set zJournal2 [string replace $zJournal 24 27 [binary format I 513]]
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write_file test.db-journal $zJournal2
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execsql {
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SELECT count(*) FROM t1;
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PRAGMA integrity_check
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}
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} {0 ok}
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do_test crash8-3.9 {
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set big [expr $SQLITE_MAX_PAGE_SIZE * 2]
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set zJournal2 [string replace $zJournal 24 27 [binary format I $big]]
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write_file test.db-journal $zJournal2
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execsql {
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SELECT count(*) FROM t1;
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PRAGMA integrity_check
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}
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} {0 ok}
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do_test crash8-3.10 {
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set zJournal2 [string replace $zJournal 24 27 [binary format I 256]]
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write_file test.db-journal $zJournal2
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execsql {
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SELECT count(*) FROM t1;
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PRAGMA integrity_check
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}
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} {0 ok}
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do_test crash8-3.11 {
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set fd [open test.db-journal w]
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fconfigure $fd -translation binary
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puts -nonewline $fd $zJournal
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close $fd
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execsql {
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SELECT count(*) FROM t1;
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PRAGMA integrity_check
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}
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} {6 ok}
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# If a connection running in persistent-journal mode is part of a
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# multi-file transaction, it must ensure that the master-journal name
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# appended to the journal file contents during the commit is located
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# at the end of the physical journal file. If there was already a
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# large journal file allocated at the start of the transaction, this
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# may mean truncating the file so that the master journal name really
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# is at the physical end of the file.
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#
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# This block of tests test that SQLite correctly truncates such
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# journal files, and that the results behave correctly if a hot-journal
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# rollback occurs.
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#
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ifcapable pragma {
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reset_db
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file delete -force test2.db
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do_test crash8-4.1 {
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execsql {
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PRAGMA journal_mode = persist;
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CREATE TABLE ab(a, b);
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INSERT INTO ab VALUES(0, 'abc');
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INSERT INTO ab VALUES(1, NULL);
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INSERT INTO ab VALUES(2, NULL);
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INSERT INTO ab VALUES(3, NULL);
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INSERT INTO ab VALUES(4, NULL);
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INSERT INTO ab VALUES(5, NULL);
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INSERT INTO ab VALUES(6, NULL);
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UPDATE ab SET b = randstr(1000,1000);
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ATTACH 'test2.db' AS aux;
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PRAGMA aux.journal_mode = persist;
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CREATE TABLE aux.ab(a, b);
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INSERT INTO aux.ab SELECT * FROM main.ab;
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UPDATE aux.ab SET b = randstr(1000,1000) WHERE a>=1;
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UPDATE ab SET b = randstr(1000,1000) WHERE a>=1;
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}
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list [file exists test.db-journal] [file exists test2.db-journal]
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} {1 1}
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do_test crash8-4.2 {
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execsql {
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BEGIN;
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UPDATE aux.ab SET b = 'def' WHERE a = 0;
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UPDATE main.ab SET b = 'def' WHERE a = 0;
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COMMIT;
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}
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} {}
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do_test crash8-4.3 {
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execsql {
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UPDATE aux.ab SET b = randstr(1000,1000) WHERE a>=1;
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UPDATE ab SET b = randstr(1000,1000) WHERE a>=1;
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}
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} {}
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set contents_main [db eval {SELECT b FROM main.ab WHERE a = 1}]
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set contents_aux [db eval {SELECT b FROM aux.ab WHERE a = 1}]
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do_test crash8-4.4 {
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crashsql -file test2.db -delay 1 {
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ATTACH 'test2.db' AS aux;
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BEGIN;
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UPDATE aux.ab SET b = 'ghi' WHERE a = 0;
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UPDATE main.ab SET b = 'ghi' WHERE a = 0;
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COMMIT;
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}
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} {1 {child process exited abnormally}}
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do_test crash8-4.5 {
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list [file exists test.db-journal] [file exists test2.db-journal]
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} {1 1}
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do_test crash8-4.6 {
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execsql {
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SELECT b FROM main.ab WHERE a = 0;
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SELECT b FROM aux.ab WHERE a = 0;
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}
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} {def def}
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do_test crash8-4.7 {
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crashsql -file test2.db -delay 1 {
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ATTACH 'test2.db' AS aux;
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BEGIN;
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UPDATE aux.ab SET b = 'jkl' WHERE a = 0;
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UPDATE main.ab SET b = 'jkl' WHERE a = 0;
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COMMIT;
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}
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} {1 {child process exited abnormally}}
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do_test crash8-4.8 {
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set fd [open test.db-journal]
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fconfigure $fd -translation binary
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seek $fd -16 end
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binary scan [read $fd 4] I len
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seek $fd [expr {-1 * ($len + 16)}] end
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set zMasterJournal [read $fd $len]
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close $fd
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file exists $zMasterJournal
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} {1}
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do_test crash8-4.9 {
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execsql { SELECT b FROM aux.ab WHERE a = 0 }
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} {def}
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do_test crash8-4.10 {
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file delete $zMasterJournal
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execsql { SELECT b FROM main.ab WHERE a = 0 }
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} {jkl}
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}
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for {set i 1} {$i < 10} {incr i} {
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catch { db close }
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file delete -force test.db test.db-journal
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sqlite3 db test.db
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do_test crash8-5.$i.1 {
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execsql {
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CREATE TABLE t1(x PRIMARY KEY);
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INSERT INTO t1 VALUES(randomblob(900));
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INSERT INTO t1 SELECT randomblob(900) FROM t1;
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INSERT INTO t1 SELECT randomblob(900) FROM t1;
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INSERT INTO t1 SELECT randomblob(900) FROM t1;
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INSERT INTO t1 SELECT randomblob(900) FROM t1;
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INSERT INTO t1 SELECT randomblob(900) FROM t1;
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INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 64 rows */
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}
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crashsql -file test.db -delay [expr ($::i%2) + 1] {
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PRAGMA cache_size = 10;
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BEGIN;
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UPDATE t1 SET x = randomblob(900);
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ROLLBACK;
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INSERT INTO t1 VALUES(randomblob(900));
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}
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execsql { PRAGMA integrity_check }
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} {ok}
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catch { db close }
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file delete -force test.db test.db-journal
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sqlite3 db test.db
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do_test crash8-5.$i.2 {
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execsql {
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PRAGMA cache_size = 10;
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CREATE TABLE t1(x PRIMARY KEY);
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INSERT INTO t1 VALUES(randomblob(900));
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INSERT INTO t1 SELECT randomblob(900) FROM t1;
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INSERT INTO t1 SELECT randomblob(900) FROM t1;
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INSERT INTO t1 SELECT randomblob(900) FROM t1;
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INSERT INTO t1 SELECT randomblob(900) FROM t1;
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INSERT INTO t1 SELECT randomblob(900) FROM t1;
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INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 64 rows */
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BEGIN;
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UPDATE t1 SET x = randomblob(900);
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}
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file delete -force testX.db testX.db-journal testX.db-wal
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copy_file test.db testX.db
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copy_file test.db-journal testX.db-journal
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db close
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crashsql -file test.db -delay [expr ($::i%2) + 1] {
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SELECT * FROM sqlite_master;
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INSERT INTO t1 VALUES(randomblob(900));
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}
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sqlite3 db2 testX.db
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execsql { PRAGMA integrity_check } db2
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} {ok}
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}
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catch {db2 close}
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finish_test
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