111 lines
4.0 KiB
Plaintext
111 lines
4.0 KiB
Plaintext
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# 2007 Aug 13
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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 file tests aspects of recovery from a malloc() failure
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# in a CREATE INDEX statement.
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#
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# $Id: crash5.test,v 1.3 2008/07/12 14:52:20 drh Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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# Only run these tests if memory debugging is turned on.
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#
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ifcapable !crashtest||!memorymanage {
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puts "Skipping crash5 tests: not compiled with -DSQLITE_MEMDEBUG..."
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finish_test
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return
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}
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db close
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for {set ii 0} {$ii < 10} {incr ii} {
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for {set jj 50} {$jj < 100} {incr jj} {
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# Set up the database so that it is an auto-vacuum database
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# containing a single table (root page 3) with a single row.
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# The row has an overflow page (page 4).
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forcedelete test.db test.db-journal
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sqlite3 db test.db
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set c [string repeat 3 1500]
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db eval {
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pragma auto_vacuum = 1;
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CREATE TABLE t1(a, b, c);
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INSERT INTO t1 VALUES('1111111111', '2222222222', $c);
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}
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db close
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do_test crash5-$ii.$jj.1 {
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crashsql -delay 1 -file test.db-journal -seed $ii -tclbody [join [list \
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[list set iFail $jj] {
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sqlite3_crashparams 0 [file join [get_pwd] test.db-journal]
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# Begin a transaction and evaluate a "CREATE INDEX" statement
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# with the iFail'th malloc() set to fail. This operation will
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# have to move the current contents of page 4 (the overflow
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# page) to make room for the new root page. The bug is that
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# if malloc() fails at a particular point in sqlite3PagerMovepage(),
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# sqlite mistakenly thinks that the page being moved (page 4) has
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# been safely synced into the journal. If the page is written
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# to later in the transaction, it may be written out to the database
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# before the relevant part of the journal has been synced.
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#
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db eval BEGIN
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sqlite3_memdebug_fail $iFail -repeat 0
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catch {db eval { CREATE UNIQUE INDEX i1 ON t1(a); }} msg
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# puts "$n $msg ac=[sqlite3_get_autocommit db]"
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# If the transaction is still active (it may not be if the malloc()
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# failure occurred in the OS layer), write to the database. Make sure
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# page 4 is among those written.
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#
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if {![sqlite3_get_autocommit db]} {
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db eval {
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DELETE FROM t1; -- This will put page 4 on the free list.
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INSERT INTO t1 VALUES('111111111', '2222222222', '33333333');
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INSERT INTO t1 SELECT * FROM t1; -- 2
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INSERT INTO t1 SELECT * FROM t1; -- 4
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INSERT INTO t1 SELECT * FROM t1; -- 8
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INSERT INTO t1 SELECT * FROM t1; -- 16
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INSERT INTO t1 SELECT * FROM t1; -- 32
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INSERT INTO t1 SELECT * FROM t1 WHERE rowid%2; -- 48
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}
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}
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# If the right malloc() failed during the 'CREATE INDEX' above and
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# the transaction was not rolled back, then the sqlite cache now
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# has a dirty page 4 that it incorrectly believes is already safely
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# in the synced part of the journal file. When
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# sqlite3_release_memory() is called sqlite tries to free memory
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# by writing page 4 out to the db file. If it crashes later on,
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# before syncing the journal... Corruption!
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#
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sqlite3_crashparams 1 [file join [get_pwd] test.db-journal]
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sqlite3_release_memory 8092
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}]] {}
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expr 1
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} {1}
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sqlite3 db test.db
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do_test crash5-$ii.$jj.2 {
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db eval {pragma integrity_check}
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} {ok}
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do_test crash5-$ii.$jj.3 {
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db eval {SELECT * FROM t1}
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} [list 1111111111 2222222222 $::c]
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db close
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}
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}
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finish_test
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