wasCSharpSQLite – Blame information for rev 1

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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