1# 2005 December 30 2# 3# The author disclaims copyright to this source code. In place of 4# a legal notice, here is a blessing: 5# 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. 9# 10#*********************************************************************** 11# 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? 15# 16# $Id: shared_err.test,v 1.21 2008/07/07 17:55:29 danielk1977 Exp $ 17 18proc skip {args} {} 19 20 21set testdir [file dirname $argv0] 22source $testdir/tester.tcl 23source $testdir/malloc_common.tcl 24db close 25 26ifcapable !shared_cache||!subquery { 27 finish_test 28 return 29} 30 31set ::enable_shared_cache [sqlite3_enable_shared_cache 1] 32 33do_ioerr_test shared_ioerr-1 -tclprep { 34 sqlite3 db2 test.db 35 execsql { 36 PRAGMA read_uncommitted = 1; 37 CREATE TABLE t1(a,b,c); 38 BEGIN; 39 SELECT * FROM sqlite_master; 40 } db2 41} -sqlbody { 42 SELECT * FROM sqlite_master; 43 INSERT INTO t1 VALUES(1,2,3); 44 BEGIN TRANSACTION; 45 INSERT INTO t1 VALUES(1,2,3); 46 INSERT INTO t1 VALUES(4,5,6); 47 ROLLBACK; 48 SELECT * FROM t1; 49 BEGIN TRANSACTION; 50 INSERT INTO t1 VALUES(1,2,3); 51 INSERT INTO t1 VALUES(4,5,6); 52 COMMIT; 53 SELECT * FROM t1; 54 DELETE FROM t1 WHERE a<100; 55} -cleanup { 56 do_test shared_ioerr-1.$n.cleanup.1 { 57 set res [catchsql { 58 SELECT * FROM t1; 59 } db2] 60 set possible_results [list \ 61 "1 {disk I/O error}" \ 62 "0 {1 2 3}" \ 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}" \ 65 "0 {}" \ 66 ] 67 set rc [expr [lsearch -exact $possible_results $res] >= 0] 68 if {$rc != 1} { 69 puts "" 70 puts "Result: $res" 71 } 72 set rc 73 } {1} 74 db2 close 75} 76 77do_ioerr_test shared_ioerr-2 -tclprep { 78 sqlite3 db2 test.db 79 execsql { 80 PRAGMA read_uncommitted = 1; 81 BEGIN; 82 CREATE TABLE t1(a, b); 83 INSERT INTO t1(oid) VALUES(NULL); 84 INSERT INTO t1(oid) SELECT NULL FROM t1; 85 INSERT INTO t1(oid) SELECT NULL FROM t1; 86 INSERT INTO t1(oid) SELECT NULL FROM t1; 87 INSERT INTO t1(oid) SELECT NULL FROM t1; 88 INSERT INTO t1(oid) SELECT NULL FROM t1; 89 INSERT INTO t1(oid) SELECT NULL FROM t1; 90 INSERT INTO t1(oid) SELECT NULL FROM t1; 91 INSERT INTO t1(oid) SELECT NULL FROM t1; 92 INSERT INTO t1(oid) SELECT NULL FROM t1; 93 INSERT INTO t1(oid) SELECT NULL FROM t1; 94 UPDATE t1 set a = oid, b = 'abcdefghijklmnopqrstuvwxyz0123456789'; 95 CREATE INDEX i1 ON t1(a); 96 COMMIT; 97 BEGIN; 98 SELECT * FROM sqlite_master; 99 } db2 100} -tclbody { 101 set ::residx 0 102 execsql {DELETE FROM t1 WHERE 0 = (a % 2);} 103 incr ::residx 104 105 # When this transaction begins the table contains 512 entries. The 106 # two statements together add 512+146 more if it succeeds. 107 # (1024/7==146) 108 execsql {BEGIN;} 109 execsql {INSERT INTO t1 SELECT a+1, b FROM t1;} 110 execsql {INSERT INTO t1 SELECT 'string' || a, b FROM t1 WHERE 0 = (a%7);} 111 execsql {COMMIT;} 112 113 incr ::residx 114} -cleanup { 115 catchsql ROLLBACK 116 do_test shared_ioerr-2.$n.cleanup.1 { 117 set res [catchsql { 118 SELECT max(a), min(a), count(*) FROM (SELECT a FROM t1 order by a); 119 } db2] 120 set possible_results [list \ 121 {0 {1024 1 1024}} \ 122 {0 {1023 1 512}} \ 123 {0 {string994 1 1170}} \ 124 ] 125 set idx [lsearch -exact $possible_results $res] 126 set success [expr {$idx==$::residx || $res=="1 {disk I/O error}"}] 127 if {!$success} { 128 puts "" 129 puts "Result: \"$res\" ($::residx)" 130 } 131 set success 132 } {1} 133 db2 close 134} 135 136# This test is designed to provoke an IO error when a cursor position is 137# "saved" (because another cursor is going to modify the underlying table). 138# 139do_ioerr_test shared_ioerr-3 -tclprep { 140 sqlite3 db2 test.db 141 execsql { 142 PRAGMA read_uncommitted = 1; 143 PRAGMA cache_size = 10; 144 BEGIN; 145 CREATE TABLE t1(a, b, UNIQUE(a, b)); 146 } db2 147 for {set i 0} {$i < 200} {incr i} { 148 set a [string range [string repeat "[format %03d $i]." 5] 0 end-1] 149 150 set b [string repeat $i 2000] 151 execsql {INSERT INTO t1 VALUES($a, $b)} db2 152 } 153 execsql {COMMIT} db2 154 set ::DB2 [sqlite3_connection_pointer db2] 155 set ::STMT [sqlite3_prepare $::DB2 "SELECT a FROM t1 ORDER BY a" -1 DUMMY] 156 sqlite3_step $::STMT ;# Cursor points at 000.000.000.000 157 sqlite3_step $::STMT ;# Cursor points at 001.001.001.001 158 159} -tclbody { 160 execsql { 161 BEGIN; 162 INSERT INTO t1 VALUES('201.201.201.201.201', NULL); 163 UPDATE t1 SET a = '202.202.202.202.202' WHERE a LIKE '201%'; 164 COMMIT; 165 } 166} -cleanup { 167 set ::steprc [sqlite3_step $::STMT] 168 set ::column [sqlite3_column_text $::STMT 0] 169 set ::finalrc [sqlite3_finalize $::STMT] 170 171 # There are three possible outcomes here (assuming persistent IO errors): 172 # 173 # 1. If the [sqlite3_step] did not require any IO (required pages in 174 # the cache), then the next row ("002...") may be retrieved 175 # successfully. 176 # 177 # 2. If the [sqlite3_step] does require IO, then [sqlite3_step] returns 178 # SQLITE_ERROR and [sqlite3_finalize] returns IOERR. 179 # 180 # 3. If, after the initial IO error, SQLite tried to rollback the 181 # active transaction and a second IO error was encountered, then 182 # statement $::STMT will have been aborted. This means [sqlite3_stmt] 183 # returns SQLITE_ABORT, and the statement cursor does not move. i.e. 184 # [sqlite3_column] still returns the current row ("001...") and 185 # [sqlite3_finalize] returns SQLITE_OK. 186 # 187 188 do_test shared_ioerr-3.$n.cleanup.1 { 189 expr { 190 $::steprc eq "SQLITE_ROW" || 191 $::steprc eq "SQLITE_ERROR" || 192 $::steprc eq "SQLITE_ABORT" 193 } 194 } {1} 195 do_test shared_ioerr-3.$n.cleanup.2 { 196 expr { 197 ($::steprc eq "SQLITE_ROW" && $::column eq "002.002.002.002.002") || 198 ($::steprc eq "SQLITE_ERROR" && $::column eq "") || 199 ($::steprc eq "SQLITE_ABORT" && $::column eq "001.001.001.001.001") 200 } 201 } {1} 202 do_test shared_ioerr-3.$n.cleanup.3 { 203 expr { 204 ($::steprc eq "SQLITE_ROW" && $::finalrc eq "SQLITE_OK") || 205 ($::steprc eq "SQLITE_ERROR" && $::finalrc eq "SQLITE_IOERR") || 206 ($::steprc eq "SQLITE_ERROR" && $::finalrc eq "SQLITE_ABORT") 207 } 208 } {1} 209 210# db2 eval {select * from sqlite_master} 211 db2 close 212} 213 214# This is a repeat of the previous test except that this time we 215# are doing a reverse-order scan of the table when the cursor is 216# "saved". 217# 218do_ioerr_test shared_ioerr-3rev -tclprep { 219 sqlite3 db2 test.db 220 execsql { 221 PRAGMA read_uncommitted = 1; 222 PRAGMA cache_size = 10; 223 BEGIN; 224 CREATE TABLE t1(a, b, UNIQUE(a, b)); 225 } db2 226 for {set i 0} {$i < 200} {incr i} { 227 set a [string range [string repeat "[format %03d $i]." 5] 0 end-1] 228 229 set b [string repeat $i 2000] 230 execsql {INSERT INTO t1 VALUES($a, $b)} db2 231 } 232 execsql {COMMIT} db2 233 set ::DB2 [sqlite3_connection_pointer db2] 234 set ::STMT [sqlite3_prepare $::DB2 \ 235 "SELECT a FROM t1 ORDER BY a DESC" -1 DUMMY] 236 sqlite3_step $::STMT ;# Cursor points at 199.199.199.199.199 237 sqlite3_step $::STMT ;# Cursor points at 198.198.198.198.198 238 239} -tclbody { 240 execsql { 241 BEGIN; 242 INSERT INTO t1 VALUES('201.201.201.201.201', NULL); 243 UPDATE t1 SET a = '202.202.202.202.202' WHERE a LIKE '201%'; 244 COMMIT; 245 } 246} -cleanup { 247 set ::steprc [sqlite3_step $::STMT] 248 set ::column [sqlite3_column_text $::STMT 0] 249 set ::finalrc [sqlite3_finalize $::STMT] 250 251 # There are three possible outcomes here (assuming persistent IO errors): 252 # 253 # 1. If the [sqlite3_step] did not require any IO (required pages in 254 # the cache), then the next row ("002...") may be retrieved 255 # successfully. 256 # 257 # 2. If the [sqlite3_step] does require IO, then [sqlite3_step] returns 258 # SQLITE_ERROR and [sqlite3_finalize] returns IOERR. 259 # 260 # 3. If, after the initial IO error, SQLite tried to rollback the 261 # active transaction and a second IO error was encountered, then 262 # statement $::STMT will have been aborted. This means [sqlite3_stmt] 263 # returns SQLITE_ABORT, and the statement cursor does not move. i.e. 264 # [sqlite3_column] still returns the current row ("001...") and 265 # [sqlite3_finalize] returns SQLITE_OK. 266 # 267 268 do_test shared_ioerr-3rev.$n.cleanup.1 { 269 expr { 270 $::steprc eq "SQLITE_ROW" || 271 $::steprc eq "SQLITE_ERROR" || 272 $::steprc eq "SQLITE_ABORT" 273 } 274 } {1} 275 do_test shared_ioerr-3rev.$n.cleanup.2 { 276 expr { 277 ($::steprc eq "SQLITE_ROW" && $::column eq "197.197.197.197.197") || 278 ($::steprc eq "SQLITE_ERROR" && $::column eq "") || 279 ($::steprc eq "SQLITE_ABORT" && $::column eq "198.198.198.198.198") 280 } 281 } {1} 282 do_test shared_ioerr-3rev.$n.cleanup.3 { 283 expr { 284 ($::steprc eq "SQLITE_ROW" && $::finalrc eq "SQLITE_OK") || 285 ($::steprc eq "SQLITE_ERROR" && $::finalrc eq "SQLITE_IOERR") || 286 ($::steprc eq "SQLITE_ERROR" && $::finalrc eq "SQLITE_ABORT") 287 } 288 } {1} 289 290# db2 eval {select * from sqlite_master} 291 db2 close 292} 293 294# Provoke a malloc() failure when a cursor position is being saved. This 295# only happens with index cursors (because they malloc() space to save the 296# current key value). It does not happen with tables, because an integer 297# key does not require a malloc() to store. 298# 299# The library should return an SQLITE_NOMEM to the caller. The query that 300# owns the cursor (the one for which the position is not saved) should 301# continue unaffected. 302# 303do_malloc_test shared_err-4 -tclprep { 304 sqlite3 db2 test.db 305 execsql { 306 PRAGMA read_uncommitted = 1; 307 BEGIN; 308 CREATE TABLE t1(a, b, UNIQUE(a, b)); 309 } db2 310 for {set i 0} {$i < 5} {incr i} { 311 set a [string repeat $i 10] 312 set b [string repeat $i 2000] 313 execsql {INSERT INTO t1 VALUES($a, $b)} db2 314 } 315 execsql {COMMIT} db2 316 set ::DB2 [sqlite3_connection_pointer db2] 317 set ::STMT [sqlite3_prepare $::DB2 "SELECT a FROM t1 ORDER BY a" -1 DUMMY] 318 sqlite3_step $::STMT ;# Cursor points at 0000000000 319 sqlite3_step $::STMT ;# Cursor points at 1111111111 320} -tclbody { 321 execsql { 322 INSERT INTO t1 VALUES(6, NULL); 323 } 324} -cleanup { 325 do_test shared_malloc-4.$::n.cleanup.1 { 326 set ::rc [sqlite3_step $::STMT] 327 expr {$::rc=="SQLITE_ROW" || $::rc=="SQLITE_ERROR"} 328 } {1} 329 if {$::rc=="SQLITE_ROW"} { 330 do_test shared_malloc-4.$::n.cleanup.2 { 331 sqlite3_column_text $::STMT 0 332 } {2222222222} 333 } 334 do_test shared_malloc-4.$::n.cleanup.3 { 335 set rc [sqlite3_finalize $::STMT] 336 expr {$rc=="SQLITE_OK" || $rc=="SQLITE_ABORT" || 337 $rc=="SQLITE_NOMEM" || $rc=="SQLITE_IOERR"} 338 } {1} 339# db2 eval {select * from sqlite_master} 340 db2 close 341} 342 343do_malloc_test shared_err-5 -tclbody { 344 db close 345 sqlite3 dbX test.db 346 sqlite3 dbY test.db 347 dbX close 348 dbY close 349} -cleanup { 350 catch {dbX close} 351 catch {dbY close} 352} 353 354do_malloc_test shared_err-6 -tclbody { 355 catch {db close} 356 sqlite3_thread_cleanup 357 sqlite3_enable_shared_cache 0 358} -cleanup { 359 sqlite3_enable_shared_cache 1 360} 361 362# As of 3.5.0, sqlite3_enable_shared_cache can be called at 363# any time and from any thread 364#do_test shared_err-misuse-7.1 { 365# sqlite3 db test.db 366# catch { 367# sqlite3_enable_shared_cache 0 368# } msg 369# set msg 370#} {library routine called out of sequence} 371 372# Again provoke a malloc() failure when a cursor position is being saved, 373# this time during a ROLLBACK operation by some other handle. 374# 375# The library should return an SQLITE_NOMEM to the caller. The query that 376# owns the cursor (the one for which the position is not saved) should 377# be aborted. 378# 379set ::aborted 0 380do_malloc_test shared_err-8 -tclprep { 381 sqlite3 db2 test.db 382 execsql { 383 PRAGMA read_uncommitted = 1; 384 BEGIN; 385 CREATE TABLE t1(a, b, UNIQUE(a, b)); 386 } db2 387 for {set i 0} {$i < 2} {incr i} { 388 set a [string repeat $i 10] 389 set b [string repeat $i 2000] 390 execsql {INSERT INTO t1 VALUES($a, $b)} db2 391 } 392 execsql {COMMIT} db2 393 set ::DB2 [sqlite3_connection_pointer db2] 394 set ::STMT [sqlite3_prepare $::DB2 "SELECT a FROM t1 ORDER BY a" -1 DUMMY] 395 sqlite3_step $::STMT ;# Cursor points at 0000000000 396 sqlite3_step $::STMT ;# Cursor points at 1111111111 397} -tclbody { 398 execsql { 399 BEGIN; 400 INSERT INTO t1 VALUES(6, NULL); 401 ROLLBACK; 402 } 403} -cleanup { 404 do_test shared_malloc-8.$::n.cleanup.1 { 405 set res [catchsql {SELECT a FROM t1} db2] 406 set ans [lindex $res 1] 407 if {[lindex $res 0]} { 408 set r [expr {$ans=="disk I/O error" || $ans=="out of memory"}] 409 } else { 410 set r [expr {[lrange $ans 0 1]=="0000000000 1111111111"}] 411 } 412 } {1} 413 do_test shared_malloc-8.$::n.cleanup.2 { 414 set rc1 [sqlite3_step $::STMT] 415 set rc2 [sqlite3_finalize $::STMT] 416 if {$rc2=="SQLITE_ABORT"} { 417 incr ::aborted 418 } 419 expr { 420 ($rc1=="SQLITE_DONE" && $rc2=="SQLITE_OK") || 421 ($rc1=="SQLITE_ERROR" && $rc2=="SQLITE_ABORT") || 422 ($rc1=="SQLITE_ERROR" && $rc2=="SQLITE_NOMEM") || 423 ($rc1=="SQLITE_ERROR" && $rc2=="SQLITE_IOERR") 424 } 425 } {1} 426 db2 close 427} 428do_test shared_malloc-8.X { 429 # Test that one or more queries were aborted due to the malloc() failure. 430 expr $::aborted>=1 431} {1} 432 433# This test is designed to catch a specific bug that was present during 434# development of 3.5.0. If a malloc() failed while setting the page-size, 435# a buffer (Pager.pTmpSpace) was being freed. This could cause a seg-fault 436# later if another connection tried to use the pager. 437# 438# This test will crash 3.4.2. 439# 440do_malloc_test shared_err-9 -tclprep { 441 sqlite3 db2 test.db 442} -sqlbody { 443 PRAGMA page_size = 4096; 444 PRAGMA page_size = 1024; 445} -cleanup { 446 db2 eval { 447 CREATE TABLE abc(a, b, c); 448 BEGIN; 449 INSERT INTO abc VALUES(1, 2, 3); 450 ROLLBACK; 451 } 452 db2 close 453} 454 455catch {db close} 456catch {db2 close} 457do_malloc_test shared_err-10 -tclprep { 458 sqlite3 db test.db 459 sqlite3 db2 test.db 460 461 db eval { SELECT * FROM sqlite_master } 462 db2 eval { 463 BEGIN; 464 CREATE TABLE abc(a, b, c); 465 } 466} -tclbody { 467 catch {db eval {SELECT * FROM sqlite_master}} 468 error 1 469} -cleanup { 470 execsql { SELECT * FROM sqlite_master } 471} 472 473do_malloc_test shared_err-11 -tclprep { 474 sqlite3 db test.db 475 sqlite3 db2 test.db 476 477 db eval { SELECT * FROM sqlite_master } 478 db2 eval { 479 BEGIN; 480 CREATE TABLE abc(a, b, c); 481 } 482} -tclbody { 483 catch {db eval {SELECT * FROM sqlite_master}} 484 catch {sqlite3_errmsg16 db} 485 error 1 486} -cleanup { 487 execsql { SELECT * FROM sqlite_master } 488} 489 490catch {db close} 491catch {db2 close} 492 493do_malloc_test shared_err-12 -sqlbody { 494 CREATE TABLE abc(a, b, c); 495 INSERT INTO abc VALUES(1, 2, 3); 496} 497 498catch {db close} 499catch {db2 close} 500sqlite3_enable_shared_cache $::enable_shared_cache 501finish_test 502