| OLD | NEW |
| (Empty) |
| 1 | |
| 2 # 2007 Aug 13 | |
| 3 # | |
| 4 # The author disclaims copyright to this source code. In place of | |
| 5 # a legal notice, here is a blessing: | |
| 6 # | |
| 7 # May you do good and not evil. | |
| 8 # May you find forgiveness for yourself and forgive others. | |
| 9 # May you share freely, never taking more than you give. | |
| 10 # | |
| 11 #*********************************************************************** | |
| 12 # | |
| 13 # This file tests aspects of recovery from a malloc() failure | |
| 14 # in a CREATE INDEX statement. | |
| 15 # | |
| 16 # $Id: crash5.test,v 1.3 2008/07/12 14:52:20 drh Exp $ | |
| 17 | |
| 18 set testdir [file dirname $argv0] | |
| 19 source $testdir/tester.tcl | |
| 20 | |
| 21 # Only run these tests if memory debugging is turned on. | |
| 22 # | |
| 23 ifcapable !memdebug||!crashtest||!memorymanage { | |
| 24 puts "Skipping crash5 tests: not compiled with -DSQLITE_MEMDEBUG..." | |
| 25 finish_test | |
| 26 return | |
| 27 } | |
| 28 | |
| 29 db close | |
| 30 | |
| 31 for {set ii 0} {$ii < 10} {incr ii} { | |
| 32 for {set jj 50} {$jj < 100} {incr jj} { | |
| 33 | |
| 34 # Set up the database so that it is an auto-vacuum database | |
| 35 # containing a single table (root page 3) with a single row. | |
| 36 # The row has an overflow page (page 4). | |
| 37 file delete -force test.db test.db-journal | |
| 38 sqlite3 db test.db | |
| 39 set c [string repeat 3 1500] | |
| 40 db eval { | |
| 41 pragma auto_vacuum = 1; | |
| 42 CREATE TABLE t1(a, b, c); | |
| 43 INSERT INTO t1 VALUES('1111111111', '2222222222', $c); | |
| 44 } | |
| 45 db close | |
| 46 | |
| 47 do_test crash5-$ii.$jj.1 { | |
| 48 crashsql -delay 1 -file test.db-journal -seed $ii -tclbody [join [list \ | |
| 49 [list set iFail $jj] { | |
| 50 sqlite3_crashparams 0 [file join [pwd] test.db-journal] | |
| 51 | |
| 52 # Begin a transaction and evaluate a "CREATE INDEX" statement | |
| 53 # with the iFail'th malloc() set to fail. This operation will | |
| 54 # have to move the current contents of page 4 (the overflow | |
| 55 # page) to make room for the new root page. The bug is that | |
| 56 # if malloc() fails at a particular point in sqlite3PagerMovepage(), | |
| 57 # sqlite mistakenly thinks that the page being moved (page 4) has | |
| 58 # been safely synced into the journal. If the page is written | |
| 59 # to later in the transaction, it may be written out to the database | |
| 60 # before the relevant part of the journal has been synced. | |
| 61 # | |
| 62 db eval BEGIN | |
| 63 sqlite3_memdebug_fail $iFail -repeat 0 | |
| 64 catch {db eval { CREATE UNIQUE INDEX i1 ON t1(a); }} msg | |
| 65 # puts "$n $msg ac=[sqlite3_get_autocommit db]" | |
| 66 | |
| 67 # If the transaction is still active (it may not be if the malloc() | |
| 68 # failure occured in the OS layer), write to the database. Make sure | |
| 69 # page 4 is among those written. | |
| 70 # | |
| 71 if {![sqlite3_get_autocommit db]} { | |
| 72 db eval { | |
| 73 DELETE FROM t1; -- This will put page 4 on the free list. | |
| 74 INSERT INTO t1 VALUES('111111111', '2222222222', '33333333'); | |
| 75 INSERT INTO t1 SELECT * FROM t1; -- 2 | |
| 76 INSERT INTO t1 SELECT * FROM t1; -- 4 | |
| 77 INSERT INTO t1 SELECT * FROM t1; -- 8 | |
| 78 INSERT INTO t1 SELECT * FROM t1; -- 16 | |
| 79 INSERT INTO t1 SELECT * FROM t1; -- 32 | |
| 80 INSERT INTO t1 SELECT * FROM t1 WHERE rowid%2; -- 48 | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 # If the right malloc() failed during the 'CREATE INDEX' above and | |
| 85 # the transaction was not rolled back, then the sqlite cache now | |
| 86 # has a dirty page 4 that it incorrectly believes is already safely | |
| 87 # in the synced part of the journal file. When | |
| 88 # sqlite3_release_memory() is called sqlite tries to free memory | |
| 89 # by writing page 4 out to the db file. If it crashes later on, | |
| 90 # before syncing the journal... Corruption! | |
| 91 # | |
| 92 sqlite3_crashparams 1 [file join [pwd] test.db-journal] | |
| 93 sqlite3_release_memory 8092 | |
| 94 }]] {} | |
| 95 expr 1 | |
| 96 } {1} | |
| 97 | |
| 98 sqlite3 db test.db | |
| 99 do_test crash5-$ii.$jj.2 { | |
| 100 db eval {pragma integrity_check} | |
| 101 } {ok} | |
| 102 do_test crash5-$ii.$jj.3 { | |
| 103 db eval {SELECT * FROM t1} | |
| 104 } [list 1111111111 2222222222 $::c] | |
| 105 db close | |
| 106 } | |
| 107 } | |
| 108 | |
| 109 | |
| 110 finish_test | |
| OLD | NEW |