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