3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #***********************************************************************
12 # This file attempts to check the behavior of the SQLite library in
13 # an out-of-memory situation. When compiled with -DSQLITE_DEBUG=1,
14 # the SQLite library accepts a special command (sqlite3_memdebug_fail N C)
15 # which causes the N-th malloc to fail. This special feature is used
16 # to see what happens in the library if a malloc were to really fail
17 # due to an out-of-memory situation.
19 # $Id: malloc.test,v 1.81 2009/06/24 13:13:45 drh Exp $
21 set testdir [file dirname $argv0]
22 source $testdir/tester.tcl
25 # Only run these tests if memory debugging is turned on.
27 source $testdir/malloc_common.tcl
29 puts "Skipping malloc tests: not compiled with -DSQLITE_MEMDEBUG..."
34 # Do a couple of memory dumps just to exercise the memory dump logic
35 # that that we can say that we have.
37 puts stderr "This is a test. Ignore the error that follows:"
38 sqlite3_memdebug_dump $testdir
39 puts "Memory dump to file memdump.txt..."
40 sqlite3_memdebug_dump memdump.txt
42 ifcapable bloblit&&subquery {
43 do_malloc_test 1 -tclprep {
46 if {[catch {sqlite3 db test.db}]} {
49 sqlite3_extended_result_codes db 1
51 DROP TABLE IF EXISTS t1;
53 a int, b float, c double, d text, e varchar(20),
56 CREATE INDEX i1 ON t1(a,b);
57 INSERT INTO t1 VALUES(1,2.3,4.5,'hi',x'746865726500');
58 INSERT INTO t1 VALUES(6,7.0,0.8,'hello','out yonder');
60 SELECT avg(b) FROM t1 GROUP BY a HAVING b>20.0;
61 DELETE FROM t1 WHERE a IN (SELECT min(a) FROM t1);
62 SELECT count(*), group_concat(e) FROM t1;
63 SELECT b FROM t1 ORDER BY 1 COLLATE nocase;
67 # Ensure that no file descriptors were leaked.
70 set sqlite_open_file_count
74 do_malloc_test 2 -sqlbody {
75 CREATE TABLE t1(a int, b int default 'abc', c int default 1);
76 CREATE INDEX i1 ON t1(a,b);
77 INSERT INTO t1 VALUES(1,1,'99 abcdefghijklmnopqrstuvwxyz');
78 INSERT INTO t1 VALUES(2,4,'98 abcdefghijklmnopqrstuvwxyz');
79 INSERT INTO t1 VALUES(3,9,'97 abcdefghijklmnopqrstuvwxyz');
80 INSERT INTO t1 VALUES(4,16,'96 abcdefghijklmnopqrstuvwxyz');
81 INSERT INTO t1 VALUES(5,25,'95 abcdefghijklmnopqrstuvwxyz');
82 INSERT INTO t1 VALUES(6,36,'94 abcdefghijklmnopqrstuvwxyz');
83 SELECT 'stuff', count(*) as 'other stuff', max(a+10) FROM t1;
84 UPDATE t1 SET b=b||b||b||b;
85 UPDATE t1 SET b=a WHERE a in (10,12,22);
86 INSERT INTO t1(c,b,a) VALUES(20,10,5);
87 INSERT INTO t1 SELECT * FROM t1
88 WHERE a IN (SELECT a FROM t1 WHERE a<10);
89 DELETE FROM t1 WHERE a>=10;
95 # Ensure that no file descriptors were leaked.
98 set sqlite_open_file_count
101 do_malloc_test 3 -sqlbody {
103 CREATE TABLE t1(a int, b int, c int);
104 CREATE INDEX i1 ON t1(a,b);
105 INSERT INTO t1 VALUES(1,1,99);
106 INSERT INTO t1 VALUES(2,4,98);
107 INSERT INTO t1 VALUES(3,9,97);
108 INSERT INTO t1 VALUES(4,16,96);
109 INSERT INTO t1 VALUES(5,25,95);
110 INSERT INTO t1 VALUES(6,36,94);
111 INSERT INTO t1(c,b,a) VALUES(20,10,5);
112 DELETE FROM t1 WHERE a>=10;
119 # Ensure that no file descriptors were leaked.
122 set sqlite_open_file_count
126 do_malloc_test 4 -sqlbody {
128 CREATE TABLE t1(a int, b int, c int);
129 CREATE INDEX i1 ON t1(a,b);
130 INSERT INTO t1 VALUES(1,1,99);
131 INSERT INTO t1 VALUES(2,4,98);
132 INSERT INTO t1 VALUES(3,9,97);
133 INSERT INTO t1 VALUES(4,16,96);
134 INSERT INTO t1 VALUES(5,25,95);
135 INSERT INTO t1 VALUES(6,36,94);
136 UPDATE t1 SET b=a WHERE a in (10,12,22);
137 INSERT INTO t1 SELECT * FROM t1
138 WHERE a IN (SELECT a FROM t1 WHERE a<10);
145 # Ensure that no file descriptors were leaked.
148 set sqlite_open_file_count
152 do_malloc_test 5 -sqlbody {
154 CREATE TABLE t1(a,b);
155 CREATE TABLE t2(x,y);
156 CREATE TRIGGER r1 AFTER INSERT ON t1 WHEN new.a = 2 BEGIN
157 INSERT INTO t2(x,y) VALUES(new.rowid,1);
158 INSERT INTO t2(x,y) SELECT * FROM t2;
159 INSERT INTO t2 SELECT * FROM t2;
160 UPDATE t2 SET y=y+1 WHERE x=new.rowid;
162 DELETE FROM t2 WHERE x=new.rowid;
164 INSERT INTO t1(a,b) VALUES(2,3);
169 # Ensure that no file descriptors were leaked.
172 set sqlite_open_file_count
176 do_malloc_test 6 -sqlprep {
179 INSERT INTO t1 VALUES(1);
180 INSERT INTO t1 SELECT a*2 FROM t1;
181 INSERT INTO t1 SELECT a*2 FROM t1;
182 INSERT INTO t1 SELECT a*2 FROM t1;
183 INSERT INTO t1 SELECT a*2 FROM t1;
184 INSERT INTO t1 SELECT a*2 FROM t1;
185 INSERT INTO t1 SELECT a*2 FROM t1;
186 INSERT INTO t1 SELECT a*2 FROM t1;
187 INSERT INTO t1 SELECT a*2 FROM t1;
188 INSERT INTO t1 SELECT a*2 FROM t1;
189 INSERT INTO t1 SELECT a*2 FROM t1;
190 DELETE FROM t1 where rowid%5 = 0;
197 autoinstall_test_functions
198 do_malloc_test 7 -sqlprep {
199 CREATE TABLE t1(a, b);
200 INSERT INTO t1 VALUES(1, 2);
201 INSERT INTO t1 VALUES(3, 4);
202 INSERT INTO t1 VALUES(5, 6);
203 INSERT INTO t1 VALUES(7, randstr(1200,1200));
205 SELECT min(a) FROM t1 WHERE a<6 GROUP BY b;
206 SELECT a FROM t1 WHERE a<6 ORDER BY a;
207 SELECT b FROM t1 WHERE a>6;
210 # This block is designed to test that some malloc failures that may
211 # occur in vdbeapi.c. Specifically, if a malloc failure that occurs
212 # when converting UTF-16 text to integers and real numbers is handled
215 # This is done by retrieving a string from the database engine and
216 # manipulating it using the sqlite3_column_*** APIs. This doesn't
217 # actually return an error to the user when a malloc() fails.. That
218 # could be viewed as a bug.
220 # These tests only run if UTF-16 support is compiled in.
224 do_malloc_test 8 -tclprep {
225 set sql "SELECT '[string repeat abc 20]', '[string repeat def 20]', ?"
226 set ::STMT [sqlite3_prepare db $sql -1 X]
228 if { $::tcl_platform(byteOrder)=="littleEndian" } {
229 set ::bomstr "\xFF\xFE"
231 set ::bomstr "\xFE\xFF"
233 append ::bomstr [encoding convertto unicode "123456789_123456789_123456789"]
235 sqlite3_column_text16 $::STMT 0
236 sqlite3_column_int $::STMT 0
237 sqlite3_column_text16 $::STMT 1
238 sqlite3_column_double $::STMT 1
239 set rc [sqlite3_reset $::STMT]
240 if {$rc eq "SQLITE_NOMEM"} {error "out of memory"}
241 sqlite3_bind_text16 $::STMT 1 $::bomstr 60
242 #catch {sqlite3_finalize $::STMT}
243 #if {[lindex [sqlite_malloc_stat] 2]<=0} {
244 # error "out of memory"
248 sqlite3_finalize $::STMT
254 # This block tests that malloc() failures that occur whilst commiting
255 # a multi-file transaction are handled correctly.
257 do_malloc_test 9 -sqlprep {
258 ATTACH 'test2.db' as test2;
259 CREATE TABLE abc1(a, b, c);
260 CREATE TABLE test2.abc2(a, b, c);
263 INSERT INTO abc1 VALUES(1, 2, 3);
264 INSERT INTO abc2 VALUES(1, 2, 3);
268 # This block tests malloc() failures that occur while opening a
269 # connection to a database.
270 do_malloc_test 10 -tclprep {
273 forcedelete test.db test.db-journal
275 sqlite3_extended_result_codes db 1
276 db eval {CREATE TABLE abc(a, b, c)}
280 sqlite3_extended_result_codes db2 1
281 db2 eval {SELECT * FROM sqlite_master}
285 # This block tests malloc() failures that occur within calls to
286 # sqlite3_create_function().
287 do_malloc_test 11 -tclbody {
288 set rc [sqlite3_create_function db]
289 if {[string match $rc SQLITE_OK]} {
290 set rc [sqlite3_create_aggregate db]
292 if {[string match $rc SQLITE_NOMEM]} {
293 error "out of memory"
297 do_malloc_test 12 -tclbody {
298 set sql16 [encoding convertto unicode "SELECT * FROM sqlite_master"]
299 append sql16 "\00\00"
300 set ::STMT [sqlite3_prepare16 db $sql16 -1 DUMMY]
301 sqlite3_finalize $::STMT
304 # Test malloc errors when replaying two hot journals from a 2-file
306 ifcapable crashtest&&attach {
307 do_malloc_test 13 -tclprep {
308 set rc [crashsql -delay 1 -file test2.db {
309 ATTACH 'test2.db' as aux;
310 PRAGMA cache_size = 10;
312 CREATE TABLE aux.t2(a, b, c);
313 CREATE TABLE t1(a, b, c);
316 if {$rc!="1 {child process exited abnormally}"} {
317 error "Wrong error message: $rc"
320 db eval {ATTACH 'test2.db' as aux;}
321 set rc [catch {db eval {
325 if {$rc && $err!="no such table: t1"} {
331 if {$tcl_platform(platform)!="windows"} {
332 do_malloc_test 14 -tclprep {
335 sqlite3_extended_result_codes db2 1
337 PRAGMA journal_mode = DELETE; /* For inmemory_journal permutation */
338 PRAGMA synchronous = 0;
339 CREATE TABLE t1(a, b);
340 INSERT INTO t1 VALUES(1, 2);
342 INSERT INTO t1 VALUES(3, 4);
344 forcecopy test2.db test.db
345 forcecopy test2.db-journal test.db-journal
349 sqlite3_extended_result_codes db 1
351 # If an out-of-memory occurs within a call to a VFS layer function during
352 # hot-journal rollback, sqlite will report SQLITE_CORRUPT. See commit
353 # [5668] for details.
354 set rc [catch {db eval { SELECT * FROM t1 }} msg]
355 if {$msg eq "database disk image is malformed"} { set msg "out of memory" }
356 if {$rc} { error $msg }
361 proc string_compare {a b} {
362 return [string compare $a $b]
365 # Test for malloc() failures in sqlite3_create_collation() and
366 # sqlite3_create_collation16().
369 do_malloc_test 15 -start 4 -tclbody {
370 db collate string_compare string_compare
371 if {[catch {add_test_collate db 1 1 1} msg]} {
372 if {$msg=="SQLITE_NOMEM"} {set msg "out of memory"}
376 db complete {SELECT "hello """||'world"' [microsoft], * FROM anicetable;}
377 db complete {-- Useful comment}
380 CREATE TABLE t1(a, b COLLATE string_compare);
381 INSERT INTO t1 VALUES(10, 'string');
382 INSERT INTO t1 VALUES(10, 'string2');
387 # Also test sqlite3_complete(). There are (currently) no malloc()
388 # calls in this function, but test anyway against future changes.
390 do_malloc_test 16 -tclbody {
391 db complete {SELECT "hello """||'world"' [microsoft], * FROM anicetable;}
392 db complete {-- Useful comment}
394 SELECT * FROM sqlite_master;
398 # Test handling of malloc() failures in sqlite3_open16().
401 do_malloc_test 17 -tclbody {
405 # open database using sqlite3_open16()
406 set filename [encoding convertto unicode test.db]
407 append filename "\x00\x00"
408 set DB2 [sqlite3_open16 $filename -unused]
410 error "out of memory"
412 sqlite3_extended_result_codes $DB2 1
415 set rc [catch {sqlite3_prepare $DB2 {SELECT * FROM sqlite_master} -1 X} msg]
416 if {[sqlite3_errcode $DB2] eq "SQLITE_IOERR+12"} {
417 error "out of memory"
419 if {[regexp ".*automatic extension loading.*" [sqlite3_errmsg $DB2]]} {
420 error "out of memory"
423 error [string range $msg 4 end]
428 set rc [sqlite3_finalize $STMT]
429 if {$rc!="SQLITE_OK"} {
430 error [sqlite3_errmsg $DB2]
435 set rc [sqlite3_close $DB2]
436 if {$rc!="SQLITE_OK"} {
437 error [sqlite3_errmsg $DB2]
442 sqlite3_finalize $STMT
445 set rc [sqlite3_close $DB2]
450 # Test handling of malloc() failures in sqlite3_errmsg16().
453 do_malloc_test 18 -tclprep {
455 db eval "SELECT [string repeat longcolumnname 10] FROM sqlite_master"
458 set utf16 [sqlite3_errmsg16 [sqlite3_connection_pointer db]]
459 binary scan $utf16 c* bytes
460 if {[llength $bytes]==0} {
461 error "out of memory"
466 # This test is aimed at coverage testing. Specificly, it is supposed to
467 # cause a malloc() only used when converting between the two utf-16
468 # encodings to fail (i.e. little-endian->big-endian). It only actually
469 # hits this malloc() on little-endian hosts.
471 set static_string "\x00h\x00e\x00l\x00l\x00o"
472 for {set l 0} {$l<10} {incr l} {
473 append static_string $static_string
475 append static_string "\x00\x00"
476 do_malloc_test 19 -tclprep {
478 PRAGMA encoding = "UTF16be";
479 CREATE TABLE abc(a, b, c);
482 unset -nocomplain ::STMT
484 set ::STMT [sqlite3_prepare db {SELECT ?} -1 DUMMY]
485 sqlite3_bind_text16 -static $::STMT 1 $static_string 112
487 if {$r} {error [string range $msg 4 end]}
490 if {[info exists ::STMT]} {
491 sqlite3_finalize $::STMT
496 # Make sure SQLITE_NOMEM is reported out on an ATTACH failure even
497 # when the malloc failure occurs within the nested parse.
500 do_malloc_test 20 -tclprep {
502 forcedelete test2.db test2.db-journal
504 sqlite3_extended_result_codes db 1
505 db eval {CREATE TABLE t1(x);}
508 if {[catch {sqlite3 db test.db}]} {
509 error "out of memory"
511 sqlite3_extended_result_codes db 1
513 ATTACH DATABASE 'test2.db' AS t2;
519 # Test malloc failure whilst installing a foreign key.
521 ifcapable foreignkey {
522 do_malloc_test 21 -sqlbody {
523 CREATE TABLE abc(a, b, c, FOREIGN KEY(a) REFERENCES abc(b))
527 # Test malloc failure in an sqlite3_prepare_v2() call.
529 do_malloc_test 22 -tclbody {
533 sqlite3_prepare_v2 db "SELECT * FROM sqlite_master" -1 DUMMY
536 if {$r} {error [string range $msg 4 end]}
539 sqlite3_finalize $::STMT
544 ifcapable {pager_pragmas} {
545 # This tests a special case - that an error that occurs while the pager
546 # is trying to recover from error-state in exclusive-access mode works.
548 do_malloc_test 23 -tclprep {
550 PRAGMA cache_size = 10;
551 PRAGMA locking_mode = exclusive;
553 CREATE TABLE abc(a, b, c);
554 CREATE INDEX abc_i ON abc(a, b, c);
556 VALUES(randstr(100,100), randstr(100,100), randstr(100,100));
558 SELECT randstr(100,100), randstr(100,100), randstr(100,100) FROM abc;
560 SELECT randstr(100,100), randstr(100,100), randstr(100,100) FROM abc;
562 SELECT randstr(100,100), randstr(100,100), randstr(100,100) FROM abc;
564 SELECT randstr(100,100), randstr(100,100), randstr(100,100) FROM abc;
566 SELECT randstr(100,100), randstr(100,100), randstr(100,100) FROM abc;
570 # This puts the pager into error state.
573 db eval {UPDATE abc SET a = 0 WHERE oid%2}
574 set ::sqlite_io_error_pending 10
575 catch {db eval {ROLLBACK}} msg
578 # If an out-of-memory occurs within a call to a VFS layer function during
579 # hot-journal rollback, sqlite will report SQLITE_CORRUPT. See commit
580 # [5668] for details.
581 set rc [catch {db eval { SELECT * FROM abc LIMIT 10 }} msg]
582 if {$msg eq "database disk image is malformed"} { set msg "out of memory" }
583 if {$rc} { error $msg }
586 set e [db eval {PRAGMA integrity_check}]
587 if {$e ne "ok"} {error $e}
592 do_malloc_test 24 -sqlprep {
593 CREATE TABLE t1(a, b, c)
595 SELECT 1 FROM t1 UNION SELECT 2 FROM t1 ORDER BY 1
599 ifcapable view&&trigger {
600 do_malloc_test 25 -sqlprep {
601 CREATE TABLE t1(a, b, c);
602 CREATE VIEW v1 AS SELECT * FROM t1;
603 CREATE TRIGGER v1t1 INSTEAD OF DELETE ON v1 BEGIN SELECT 1; END;
604 CREATE TRIGGER v1t2 INSTEAD OF INSERT ON v1 BEGIN SELECT 1; END;
605 CREATE TRIGGER v1t3 INSTEAD OF UPDATE ON v1 BEGIN SELECT 1; END;
607 DELETE FROM v1 WHERE a = 1;
608 INSERT INTO v1 VALUES(1, 2, 3);
609 UPDATE v1 SET a = 1 WHERE b = 2;
613 do_malloc_test 25 -sqlprep {
614 CREATE TABLE abc(a, b, c);
615 CREATE INDEX i1 ON abc(a, b);
616 INSERT INTO abc VALUES(1, 2, 3);
617 INSERT INTO abc VALUES(4, 5, 6);
619 # For each UPDATE executed, the cursor used for the SELECT statement
620 # must be "saved". Because the cursor is open on an index, this requires
621 # a malloc() to allocate space to save the index key. This test case is
622 # aimed at testing the response of the library to a failure in that
623 # particular malloc() call.
624 db eval {SELECT a FROM abc ORDER BY a} {
625 db eval {UPDATE abc SET b = b - 1 WHERE a = $a}
629 # This test is designed to test a specific juncture in the sqlite code.
630 # The database set up by -sqlprep script contains a single table B-Tree
631 # of height 2. In the -tclbody script, the existing database connection
632 # is closed and a new one opened and used to insert a new row into the
633 # table B-Tree. By using a new connection, the outcome of a malloc()
634 # failure while seeking to the right-hand side of the B-Tree to insert
635 # a new record can be tested.
637 do_malloc_test 26 -sqlprep {
639 CREATE TABLE t1(a, b);
640 INSERT INTO t1 VALUES(1, randomblob(210));
641 INSERT INTO t1 VALUES(1, randomblob(210));
642 INSERT INTO t1 VALUES(1, randomblob(210));
643 INSERT INTO t1 VALUES(1, randomblob(210));
644 INSERT INTO t1 VALUES(1, randomblob(210));
649 db eval { INSERT INTO t1 VALUES(1, randomblob(210)) }
652 # Test that no memory is leaked following a malloc() failure in
653 # sqlite3_initialize().
655 do_malloc_test 27 -tclprep {
659 set rc [sqlite3_initialize]
660 if {$rc == "SQLITE_NOMEM"} {
661 error "out of memory"
664 autoinstall_test_functions
666 # Test that malloc failures that occur while processing INDEXED BY
667 # clauses are handled correctly.
668 do_malloc_test 28 -sqlprep {
669 CREATE TABLE t1(a, b);
670 CREATE INDEX i1 ON t1(a);
671 CREATE VIEW v1 AS SELECT * FROM t1 INDEXED BY i1 WHERE a = 10;
673 SELECT * FROM t1 INDEXED BY i1 ORDER BY a;
677 do_malloc_test 29 -sqlprep {
678 CREATE TABLE t1(a TEXT, b TEXT);
680 INSERT INTO t1 VALUES(1, -234);
681 INSERT INTO t1 SELECT * FROM t1 UNION ALL SELECT * FROM t1;
684 do_malloc_test 30 -tclprep {
686 CREATE TABLE t1(x PRIMARY KEY);
687 INSERT INTO t1 VALUES(randstr(500,500));
688 INSERT INTO t1 VALUES(randstr(500,500));
689 INSERT INTO t1 VALUES(randstr(500,500));
694 # The DELETE command in the following block moves the overflow pages that
695 # are part of the primary key index to the free-list. But it does not
696 # actually load the content of the pages. This leads to the peculiar
697 # situation where cache entries exist, but are not populated with data.
698 # They are populated next time they are requested by the b-tree layer.
706 -- This statement requires the 'no-content' pages loaded by the DELETE
707 -- statement above. When requesting the pages, the content is loaded
708 -- from the database file. The point of this test case is to test handling
709 -- of malloc errors (including SQLITE_IOERR_NOMEM errors) when loading
711 SELECT * FROM t1 ORDER BY x;
714 # After committing a transaction in persistent-journal mode, if a journal
715 # size limit is configured SQLite may attempt to truncate the journal file.
716 # This test verifies the libraries response to a malloc() failure during
719 do_malloc_test 31 -sqlprep {
720 PRAGMA journal_mode = persist;
721 PRAGMA journal_size_limit = 1024;
722 CREATE TABLE t1(a PRIMARY KEY, b);
724 INSERT INTO t1 VALUES(1, 2);
727 # When written, this test provoked an obscure change-counter bug.
729 # If, when running in exclusive mode, a malloc() failure occurs
730 # after the database file change-counter has been written but
731 # before the transaction has been committed, then the transaction
732 # is automatically rolled back. However, internally the
733 # Pager.changeCounterDone flag was being left set. This means
734 # that if the same connection attempts another transaction following
735 # the malloc failure and rollback, the change counter will not
736 # be updated. This could corrupt another processes cache.
738 do_malloc_test 32 -tclprep {
739 # Build a small database containing an indexed table.
742 PRAGMA locking_mode = normal;
744 CREATE TABLE t1(a PRIMARY KEY, b);
745 INSERT INTO t1 VALUES(1, 'one');
746 INSERT INTO t1 VALUES(2, 'two');
747 INSERT INTO t1 VALUES(3, 'three');
749 PRAGMA locking_mode = exclusive;
752 # Open a second database connection. Load the table (but not index)
753 # into the second connections pager cache.
757 PRAGMA locking_mode = normal;
762 # Running in exclusive mode, perform a database transaction that
763 # modifies both the database table and index. For iterations where
764 # the malloc failure occurs after updating the change counter but
765 # before committing the transaction, this should result in the
766 # transaction being rolled back but the changeCounterDone flag
769 db eval { UPDATE t1 SET a = a + 3 }
772 # Perform another transaction using the first connection. Unlock
773 # the database after doing so. If this is one of the right iterations,
774 # then this should result in the database contents being updated but
775 # the change-counter left as it is.
778 PRAGMA locking_mode = normal;
779 UPDATE t1 SET a = a + 3;
782 # Now do an integrity check with the second connection. The second
783 # connection still has the database table in its cache. If this is
784 # one of the magic iterations and the change counter was not modified,
785 # then it won't realize that the cached data is out of date. Since
786 # the cached data won't match the up to date index data read from
787 # the database file, the integrity check should fail.
789 set zRepeat "transient"
790 if {$::iRepeat} {set zRepeat "persistent"}
791 do_test malloc-32.$zRepeat.${::n}.integrity {
792 execsql {PRAGMA integrity_check} db2
797 # The following two OOM tests verify that OOM handling works in the
798 # code used to optimize "SELECT count(*) FROM <tbl>".
800 do_malloc_test 33 -tclprep {
801 db eval { PRAGMA cache_size = 10 }
803 db eval { CREATE TABLE abc(a, b) }
804 for {set i 0} {$i<500} {incr i} {
805 db eval {INSERT INTO abc VALUES(randstr(100,100), randstr(1000,1000))}
809 SELECT count(*) FROM abc;
811 do_malloc_test 34 -tclprep {
812 db eval { PRAGMA cache_size = 10 }
814 db eval { CREATE TABLE abc(a PRIMARY KEY, b) }
815 for {set i 0} {$i<500} {incr i} {
816 db eval {INSERT INTO abc VALUES(randstr(100,100), randstr(1000,1000))}
820 SELECT count(*) FROM abc;
823 proc f {args} { error "Quite a long error!" }
824 do_malloc_test 35 -tclprep {
826 set ::STMT [sqlite3_prepare db "SELECT f()" -1 DUMMY]
829 sqlite3_finalize $::STMT
831 # At one point an assert( !db->mallocFailed ) could fail in the following
832 # call to sqlite3_errmsg(). Because sqlite3_finalize() had failed to clear
833 # the flag before returning.
837 do_malloc_test 36 -sqlprep {
838 CREATE TABLE t1(a, b);
839 INSERT INTO t1 VALUES(1, 2);
840 INSERT INTO t1 VALUES(3, 4);
842 SELECT test_agg_errmsg16(), group_concat(a) FROM t1
845 # At one point, if an OOM occured immediately after obtaining a shared lock
846 # on the database file, the file remained locked. This test case ensures
847 # that bug has been fixed.i
848 if {[db eval {PRAGMA locking_mode}]!="exclusive"} {
849 do_malloc_test 37 -tclprep {
852 CREATE TABLE t1(a, b);
853 INSERT INTO t1 VALUES(1, 2);
858 # Try to write to the database using connection [db2]. If connection [db]
859 # has correctly released the shared lock, this write attempt should
860 # succeed. If [db] has not released the lock, this should hit an
862 do_test malloc-36.$zRepeat.${::n}.unlocked {
863 execsql {INSERT INTO t1 VALUES(3, 4)} db2
871 # Test that if an OOM error occurs, aux-data is still correctly destroyed.
872 # This test case was causing either a memory-leak or an assert() failure
873 # at one point, depending on the configuration.
875 do_malloc_test 39 -tclprep {
878 SELECT test_auxdata('abc', 'def');
883 # Ensure that no file descriptors were leaked.
884 do_test malloc-99.X {
886 set sqlite_open_file_count
889 puts open-file-count=$sqlite_open_file_count