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 # The focus of the tests in this file are IO errors that occur in a shared
13 # cache context. What happens to connection B if one connection A encounters
14 # an IO-error whilst reading or writing the file-system?
16 # $Id: shared_err.test,v 1.24 2008/10/12 00:27:54 shane Exp $
21 set testdir [file dirname $argv0]
22 source $testdir/tester.tcl
23 source $testdir/malloc_common.tcl
26 ifcapable !shared_cache||!subquery {
31 set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
33 do_ioerr_test shared_ioerr-1 -tclprep {
36 PRAGMA read_uncommitted = 1;
37 CREATE TABLE t1(a,b,c);
39 SELECT * FROM sqlite_master;
42 SELECT * FROM sqlite_master;
43 INSERT INTO t1 VALUES(1,2,3);
45 INSERT INTO t1 VALUES(1,2,3);
46 INSERT INTO t1 VALUES(4,5,6);
50 INSERT INTO t1 VALUES(1,2,3);
51 INSERT INTO t1 VALUES(4,5,6);
54 DELETE FROM t1 WHERE a<100;
56 do_test shared_ioerr-1.$n.cleanup.1 {
60 set possible_results [list \
61 "1 {disk I/O error}" \
63 "0 {1 2 3 1 2 3 4 5 6}" \
64 "0 {1 2 3 1 2 3 4 5 6 1 2 3 4 5 6}" \
66 "1 {database disk image is malformed}" \
68 set rc [expr [lsearch -exact $possible_results $res] >= 0]
76 # The "database disk image is malformed" is a special case that can
77 # occur if an IO error occurs during a rollback in the {SELECT * FROM t1}
78 # statement above. This test is to make sure there is no real database
81 do_test shared_ioerr-1.$n.cleanup.2 {
82 execsql {pragma integrity_check} db
86 do_ioerr_test shared_ioerr-2 -tclprep {
89 PRAGMA read_uncommitted = 1;
91 CREATE TABLE t1(a, b);
92 INSERT INTO t1(oid) VALUES(NULL);
93 INSERT INTO t1(oid) SELECT NULL FROM t1;
94 INSERT INTO t1(oid) SELECT NULL FROM t1;
95 INSERT INTO t1(oid) SELECT NULL FROM t1;
96 INSERT INTO t1(oid) SELECT NULL FROM t1;
97 INSERT INTO t1(oid) SELECT NULL FROM t1;
98 INSERT INTO t1(oid) SELECT NULL FROM t1;
99 INSERT INTO t1(oid) SELECT NULL FROM t1;
100 INSERT INTO t1(oid) SELECT NULL FROM t1;
101 INSERT INTO t1(oid) SELECT NULL FROM t1;
102 INSERT INTO t1(oid) SELECT NULL FROM t1;
103 UPDATE t1 set a = oid, b = 'abcdefghijklmnopqrstuvwxyz0123456789';
104 CREATE INDEX i1 ON t1(a);
107 SELECT * FROM sqlite_master;
111 execsql {DELETE FROM t1 WHERE 0 = (a % 2);}
114 # When this transaction begins the table contains 512 entries. The
115 # two statements together add 512+146 more if it succeeds.
118 execsql {INSERT INTO t1 SELECT a+1, b FROM t1;}
119 execsql {INSERT INTO t1 SELECT 'string' || a, b FROM t1 WHERE 0 = (a%7);}
125 do_test shared_ioerr-2.$n.cleanup.1 {
127 SELECT max(a), min(a), count(*) FROM (SELECT a FROM t1 order by a);
129 set possible_results [list \
132 {0 {string994 1 1170}} \
134 set idx [lsearch -exact $possible_results $res]
135 set success [expr {$idx==$::residx || $res=="1 {disk I/O error}"}]
138 puts "Result: \"$res\" ($::residx)"
145 # This test is designed to provoke an IO error when a cursor position is
146 # "saved" (because another cursor is going to modify the underlying table).
148 do_ioerr_test shared_ioerr-3 -tclprep {
151 PRAGMA read_uncommitted = 1;
152 PRAGMA cache_size = 10;
154 CREATE TABLE t1(a, b, UNIQUE(a, b));
156 for {set i 0} {$i < 200} {incr i} {
157 set a [string range [string repeat "[format %03d $i]." 5] 0 end-1]
159 set b [string repeat $i 2000]
160 execsql {INSERT INTO t1 VALUES($a, $b)} db2
163 set ::DB2 [sqlite3_connection_pointer db2]
164 set ::STMT [sqlite3_prepare $::DB2 "SELECT a FROM t1 ORDER BY a" -1 DUMMY]
165 sqlite3_step $::STMT ;# Cursor points at 000.000.000.000
166 sqlite3_step $::STMT ;# Cursor points at 001.001.001.001
171 INSERT INTO t1 VALUES('201.201.201.201.201', NULL);
172 UPDATE t1 SET a = '202.202.202.202.202' WHERE a LIKE '201%';
176 set ::steprc [sqlite3_step $::STMT]
177 set ::column [sqlite3_column_text $::STMT 0]
178 set ::finalrc [sqlite3_finalize $::STMT]
180 # There are three possible outcomes here (assuming persistent IO errors):
182 # 1. If the [sqlite3_step] did not require any IO (required pages in
183 # the cache), then the next row ("002...") may be retrieved
186 # 2. If the [sqlite3_step] does require IO, then [sqlite3_step] returns
187 # SQLITE_ERROR and [sqlite3_finalize] returns IOERR.
189 # 3. If, after the initial IO error, SQLite tried to rollback the
190 # active transaction and a second IO error was encountered, then
191 # statement $::STMT will have been aborted. This means [sqlite3_stmt]
192 # returns SQLITE_ABORT, and the statement cursor does not move. i.e.
193 # [sqlite3_column] still returns the current row ("001...") and
194 # [sqlite3_finalize] returns SQLITE_OK.
197 do_test shared_ioerr-3.$n.cleanup.1 {
199 $::steprc eq "SQLITE_ROW" ||
200 $::steprc eq "SQLITE_ERROR" ||
201 $::steprc eq "SQLITE_ABORT"
204 do_test shared_ioerr-3.$n.cleanup.2 {
206 ($::steprc eq "SQLITE_ROW" && $::column eq "002.002.002.002.002") ||
207 ($::steprc eq "SQLITE_ERROR" && $::column eq "") ||
208 ($::steprc eq "SQLITE_ABORT" && $::column eq "001.001.001.001.001")
211 do_test shared_ioerr-3.$n.cleanup.3 {
213 ($::steprc eq "SQLITE_ROW" && $::finalrc eq "SQLITE_OK") ||
214 ($::steprc eq "SQLITE_ERROR" && $::finalrc eq "SQLITE_IOERR") ||
215 ($::steprc eq "SQLITE_ERROR" && $::finalrc eq "SQLITE_ABORT")
219 # db2 eval {select * from sqlite_master}
223 # This is a repeat of the previous test except that this time we
224 # are doing a reverse-order scan of the table when the cursor is
227 do_ioerr_test shared_ioerr-3rev -tclprep {
230 PRAGMA read_uncommitted = 1;
231 PRAGMA cache_size = 10;
233 CREATE TABLE t1(a, b, UNIQUE(a, b));
235 for {set i 0} {$i < 200} {incr i} {
236 set a [string range [string repeat "[format %03d $i]." 5] 0 end-1]
238 set b [string repeat $i 2000]
239 execsql {INSERT INTO t1 VALUES($a, $b)} db2
242 set ::DB2 [sqlite3_connection_pointer db2]
243 set ::STMT [sqlite3_prepare $::DB2 \
244 "SELECT a FROM t1 ORDER BY a DESC" -1 DUMMY]
245 sqlite3_step $::STMT ;# Cursor points at 199.199.199.199.199
246 sqlite3_step $::STMT ;# Cursor points at 198.198.198.198.198
251 INSERT INTO t1 VALUES('201.201.201.201.201', NULL);
252 UPDATE t1 SET a = '202.202.202.202.202' WHERE a LIKE '201%';
256 set ::steprc [sqlite3_step $::STMT]
257 set ::column [sqlite3_column_text $::STMT 0]
258 set ::finalrc [sqlite3_finalize $::STMT]
260 # There are three possible outcomes here (assuming persistent IO errors):
262 # 1. If the [sqlite3_step] did not require any IO (required pages in
263 # the cache), then the next row ("002...") may be retrieved
266 # 2. If the [sqlite3_step] does require IO, then [sqlite3_step] returns
267 # SQLITE_ERROR and [sqlite3_finalize] returns IOERR.
269 # 3. If, after the initial IO error, SQLite tried to rollback the
270 # active transaction and a second IO error was encountered, then
271 # statement $::STMT will have been aborted. This means [sqlite3_stmt]
272 # returns SQLITE_ABORT, and the statement cursor does not move. i.e.
273 # [sqlite3_column] still returns the current row ("001...") and
274 # [sqlite3_finalize] returns SQLITE_OK.
277 do_test shared_ioerr-3rev.$n.cleanup.1 {
279 $::steprc eq "SQLITE_ROW" ||
280 $::steprc eq "SQLITE_ERROR" ||
281 $::steprc eq "SQLITE_ABORT"
284 do_test shared_ioerr-3rev.$n.cleanup.2 {
286 ($::steprc eq "SQLITE_ROW" && $::column eq "197.197.197.197.197") ||
287 ($::steprc eq "SQLITE_ERROR" && $::column eq "") ||
288 ($::steprc eq "SQLITE_ABORT" && $::column eq "198.198.198.198.198")
291 do_test shared_ioerr-3rev.$n.cleanup.3 {
293 ($::steprc eq "SQLITE_ROW" && $::finalrc eq "SQLITE_OK") ||
294 ($::steprc eq "SQLITE_ERROR" && $::finalrc eq "SQLITE_IOERR") ||
295 ($::steprc eq "SQLITE_ERROR" && $::finalrc eq "SQLITE_ABORT")
299 # db2 eval {select * from sqlite_master}
303 # Provoke a malloc() failure when a cursor position is being saved. This
304 # only happens with index cursors (because they malloc() space to save the
305 # current key value). It does not happen with tables, because an integer
306 # key does not require a malloc() to store.
308 # The library should return an SQLITE_NOMEM to the caller. The query that
309 # owns the cursor (the one for which the position is not saved) should
310 # continue unaffected.
312 do_malloc_test shared_err-4 -tclprep {
315 PRAGMA read_uncommitted = 1;
317 CREATE TABLE t1(a, b, UNIQUE(a, b));
319 for {set i 0} {$i < 5} {incr i} {
320 set a [string repeat $i 10]
321 set b [string repeat $i 2000]
322 execsql {INSERT INTO t1 VALUES($a, $b)} db2
325 set ::DB2 [sqlite3_connection_pointer db2]
326 set ::STMT [sqlite3_prepare $::DB2 "SELECT a FROM t1 ORDER BY a" -1 DUMMY]
327 sqlite3_step $::STMT ;# Cursor points at 0000000000
328 sqlite3_step $::STMT ;# Cursor points at 1111111111
331 INSERT INTO t1 VALUES(6, NULL);
334 do_test shared_malloc-4.$::n.cleanup.1 {
335 set ::rc [sqlite3_step $::STMT]
336 expr {$::rc=="SQLITE_ROW" || $::rc=="SQLITE_ERROR"}
338 if {$::rc=="SQLITE_ROW"} {
339 do_test shared_malloc-4.$::n.cleanup.2 {
340 sqlite3_column_text $::STMT 0
343 do_test shared_malloc-4.$::n.cleanup.3 {
344 set rc [sqlite3_finalize $::STMT]
345 expr {$rc=="SQLITE_OK" || $rc=="SQLITE_ABORT" ||
346 $rc=="SQLITE_NOMEM" || $rc=="SQLITE_IOERR"}
348 # db2 eval {select * from sqlite_master}
352 do_malloc_test shared_err-5 -tclbody {
363 do_malloc_test shared_err-6 -tclbody {
365 ifcapable deprecated {
366 sqlite3_thread_cleanup
368 sqlite3_enable_shared_cache 0
370 sqlite3_enable_shared_cache 1
373 # As of 3.5.0, sqlite3_enable_shared_cache can be called at
374 # any time and from any thread
375 #do_test shared_err-misuse-7.1 {
378 # sqlite3_enable_shared_cache 0
381 #} {library routine called out of sequence}
383 # Again provoke a malloc() failure when a cursor position is being saved,
384 # this time during a ROLLBACK operation by some other handle.
386 # The library should return an SQLITE_NOMEM to the caller. The query that
387 # owns the cursor (the one for which the position is not saved) should
391 do_malloc_test shared_err-8 -tclprep {
394 PRAGMA read_uncommitted = 1;
396 CREATE TABLE t1(a, b, UNIQUE(a, b));
398 for {set i 0} {$i < 2} {incr i} {
399 set a [string repeat $i 10]
400 set b [string repeat $i 2000]
401 execsql {INSERT INTO t1 VALUES($a, $b)} db2
406 set ::DB2 [sqlite3_connection_pointer db2]
407 set ::STMT [sqlite3_prepare $::DB2 "SELECT a FROM t1 ORDER BY a" -1 DUMMY]
408 sqlite3_step $::STMT ;# Cursor points at 0000000000
409 sqlite3_step $::STMT ;# Cursor points at 1111111111
413 INSERT INTO t1 VALUES(6, NULL);
416 # UPDATE: As of [5668], if the rollback fails SQLITE_CORRUPT is returned.
417 # So these tests have been updated to expect SQLITE_CORRUPT and its
418 # associated English language error message.
420 do_test shared_malloc-8.$::n.cleanup.1 {
421 set res [catchsql {SELECT a FROM t1} db2]
422 set ans [lindex $res 1]
423 if {[lindex $res 0]} {
425 $ans=="disk I/O error" ||
426 $ans=="out of memory" ||
427 $ans=="database disk image is malformed"
430 set r [expr {[lrange $ans 0 1]=="0000000000 1111111111"}]
433 do_test shared_malloc-8.$::n.cleanup.2 {
434 set rc1 [sqlite3_step $::STMT]
435 set rc2 [sqlite3_finalize $::STMT]
436 if {$rc2=="SQLITE_ABORT"} {
440 ($rc1=="SQLITE_DONE" && $rc2=="SQLITE_OK") ||
441 ($rc1=="SQLITE_ERROR" && $rc2=="SQLITE_ABORT") ||
442 ($rc1=="SQLITE_ERROR" && $rc2=="SQLITE_NOMEM") ||
443 ($rc1=="SQLITE_ERROR" && $rc2=="SQLITE_IOERR") ||
444 ($rc1=="SQLITE_ERROR" && $rc2=="SQLITE_CORRUPT")
450 # When this test case was written, OOM errors in write statements would
451 # cause transaction rollback, which would trip cursors in other statements,
452 # aborting them. This no longer happens.
454 do_test shared_malloc-8.X {
455 # Test that one or more queries were aborted due to the malloc() failure.
460 # This test is designed to catch a specific bug that was present during
461 # development of 3.5.0. If a malloc() failed while setting the page-size,
462 # a buffer (Pager.pTmpSpace) was being freed. This could cause a seg-fault
463 # later if another connection tried to use the pager.
465 # This test will crash 3.4.2.
467 do_malloc_test shared_err-9 -tclprep {
470 PRAGMA page_size = 4096;
471 PRAGMA page_size = 1024;
474 CREATE TABLE abc(a, b, c);
476 INSERT INTO abc VALUES(1, 2, 3);
484 do_malloc_test shared_err-10 -tclprep {
488 db eval { SELECT * FROM sqlite_master }
491 CREATE TABLE abc(a, b, c);
494 catch {db eval {SELECT * FROM sqlite_master}}
497 execsql { SELECT * FROM sqlite_master }
500 do_malloc_test shared_err-11 -tclprep {
504 db eval { SELECT * FROM sqlite_master }
507 CREATE TABLE abc(a, b, c);
510 catch {db eval {SELECT * FROM sqlite_master}}
511 catch {sqlite3_errmsg16 db}
514 execsql { SELECT * FROM sqlite_master }
520 do_malloc_test shared_err-12 -sqlbody {
521 CREATE TABLE abc(a, b, c);
522 INSERT INTO abc VALUES(1, 2, 3);
527 sqlite3_enable_shared_cache $::enable_shared_cache