| |
| # 2007 Aug 13 |
| # |
| # The author disclaims copyright to this source code. In place of |
| # a legal notice, here is a blessing: |
| # |
| # May you do good and not evil. |
| # May you find forgiveness for yourself and forgive others. |
| # May you share freely, never taking more than you give. |
| # |
| #*********************************************************************** |
| # |
| # This file tests aspects of recovery from a malloc() failure |
| # in a CREATE INDEX statement. |
| # |
| # $Id: crash5.test,v 1.3 2008/07/12 14:52:20 drh Exp $ |
| |
| set testdir [file dirname $argv0] |
| source $testdir/tester.tcl |
| |
| # Only run these tests if memory debugging is turned on. |
| # |
| ifcapable !memdebug||!crashtest||!memorymanage { |
| puts "Skipping crash5 tests: not compiled with -DSQLITE_MEMDEBUG..." |
| finish_test |
| return |
| } |
| |
| db close |
| |
| for {set ii 0} {$ii < 10} {incr ii} { |
| for {set jj 50} {$jj < 100} {incr jj} { |
| |
| # Set up the database so that it is an auto-vacuum database |
| # containing a single table (root page 3) with a single row. |
| # The row has an overflow page (page 4). |
| file delete -force test.db test.db-journal |
| sqlite3 db test.db |
| set c [string repeat 3 1500] |
| db eval { |
| pragma auto_vacuum = 1; |
| CREATE TABLE t1(a, b, c); |
| INSERT INTO t1 VALUES('1111111111', '2222222222', $c); |
| } |
| db close |
| |
| do_test crash5-$ii.$jj.1 { |
| crashsql -delay 1 -file test.db-journal -seed $ii -tclbody [join [list \ |
| [list set iFail $jj] { |
| sqlite3_crashparams 0 [file join [pwd] test.db-journal] |
| |
| # Begin a transaction and evaluate a "CREATE INDEX" statement |
| # with the iFail'th malloc() set to fail. This operation will |
| # have to move the current contents of page 4 (the overflow |
| # page) to make room for the new root page. The bug is that |
| # if malloc() fails at a particular point in sqlite3PagerMovepage(), |
| # sqlite mistakenly thinks that the page being moved (page 4) has |
| # been safely synced into the journal. If the page is written |
| # to later in the transaction, it may be written out to the database |
| # before the relevant part of the journal has been synced. |
| # |
| db eval BEGIN |
| sqlite3_memdebug_fail $iFail -repeat 0 |
| catch {db eval { CREATE UNIQUE INDEX i1 ON t1(a); }} msg |
| # puts "$n $msg ac=[sqlite3_get_autocommit db]" |
| |
| # If the transaction is still active (it may not be if the malloc() |
| # failure occured in the OS layer), write to the database. Make sure |
| # page 4 is among those written. |
| # |
| if {![sqlite3_get_autocommit db]} { |
| db eval { |
| DELETE FROM t1; -- This will put page 4 on the free list. |
| INSERT INTO t1 VALUES('111111111', '2222222222', '33333333'); |
| INSERT INTO t1 SELECT * FROM t1; -- 2 |
| INSERT INTO t1 SELECT * FROM t1; -- 4 |
| INSERT INTO t1 SELECT * FROM t1; -- 8 |
| INSERT INTO t1 SELECT * FROM t1; -- 16 |
| INSERT INTO t1 SELECT * FROM t1; -- 32 |
| INSERT INTO t1 SELECT * FROM t1 WHERE rowid%2; -- 48 |
| } |
| } |
| |
| # If the right malloc() failed during the 'CREATE INDEX' above and |
| # the transaction was not rolled back, then the sqlite cache now |
| # has a dirty page 4 that it incorrectly believes is already safely |
| # in the synced part of the journal file. When |
| # sqlite3_release_memory() is called sqlite tries to free memory |
| # by writing page 4 out to the db file. If it crashes later on, |
| # before syncing the journal... Corruption! |
| # |
| sqlite3_crashparams 1 [file join [pwd] test.db-journal] |
| sqlite3_release_memory 8092 |
| }]] {} |
| expr 1 |
| } {1} |
| |
| sqlite3 db test.db |
| do_test crash5-$ii.$jj.2 { |
| db eval {pragma integrity_check} |
| } {ok} |
| do_test crash5-$ii.$jj.3 { |
| db eval {SELECT * FROM t1} |
| } [list 1111111111 2222222222 $::c] |
| db close |
| } |
| } |
| |
| |
| finish_test |