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 1.12 2007/08/25 13:37:49 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: $res" 71 } 72 set rc 73 } {1} 74 db2 close 75} 76 77do_ioerr_test shared_ioerr-2 -tclprep { 78 sqlite3 db2 test.db 79 execsql { 80 PRAGMA read_uncommitted = 1; 81 BEGIN; 82 CREATE TABLE t1(a, b); 83 INSERT INTO t1(oid) VALUES(NULL); 84 INSERT INTO t1(oid) SELECT NULL FROM t1; 85 INSERT INTO t1(oid) SELECT NULL FROM t1; 86 INSERT INTO t1(oid) SELECT NULL FROM t1; 87 INSERT INTO t1(oid) SELECT NULL FROM t1; 88 INSERT INTO t1(oid) SELECT NULL FROM t1; 89 INSERT INTO t1(oid) SELECT NULL FROM t1; 90 INSERT INTO t1(oid) SELECT NULL FROM t1; 91 INSERT INTO t1(oid) SELECT NULL FROM t1; 92 INSERT INTO t1(oid) SELECT NULL FROM t1; 93 INSERT INTO t1(oid) SELECT NULL FROM t1; 94 UPDATE t1 set a = oid, b = 'abcdefghijklmnopqrstuvwxyz0123456789'; 95 CREATE INDEX i1 ON t1(a); 96 COMMIT; 97 BEGIN; 98 SELECT * FROM sqlite_master; 99 } db2 100} -tclbody { 101 set ::residx 0 102 execsql {DELETE FROM t1 WHERE 0 = (a % 2);} 103 incr ::residx 104 105 # When this transaction begins the table contains 512 entries. The 106 # two statements together add 512+146 more if it succeeds. 107 # (1024/7==146) 108 execsql {BEGIN;} 109 execsql {INSERT INTO t1 SELECT a+1, b FROM t1;} 110 execsql {INSERT INTO t1 SELECT 'string' || a, b FROM t1 WHERE 0 = (a%7);} 111 execsql {COMMIT;} 112 113 incr ::residx 114} -cleanup { 115 do_test shared_ioerr-2.$n.cleanup.1 { 116 set res [catchsql { 117 SELECT max(a), min(a), count(*) FROM (SELECT a FROM t1 order by a); 118 } db2] 119 set possible_results [list \ 120 {0 {1024 1 1024}} \ 121 {0 {1023 1 512}} \ 122 {0 {string994 1 1170}} \ 123 ] 124 set idx [lsearch -exact $possible_results $res] 125 set success [expr {$idx==$::residx || $res=="1 {disk I/O error}"}] 126 if {!$success} { 127 puts "" 128 puts "Result: \"$res\" ($::residx)" 129 } 130 set success 131 } {1} 132 db2 close 133} 134 135# This test is designed to provoke an IO error when a cursor position is 136# "saved" (because another cursor is going to modify the underlying table). 137# 138do_ioerr_test shared_ioerr-3 -tclprep { 139 sqlite3 db2 test.db 140 execsql { 141 PRAGMA read_uncommitted = 1; 142 PRAGMA cache_size = 10; 143 BEGIN; 144 CREATE TABLE t1(a, b, UNIQUE(a, b)); 145 } db2 146 for {set i 0} {$i < 200} {incr i} { 147 set a [string range [string repeat "[format %03d $i]." 5] 0 end-1] 148 149 set b [string repeat $i 2000] 150 execsql {INSERT INTO t1 VALUES($a, $b)} db2 151 } 152 execsql {COMMIT} db2 153 set ::DB2 [sqlite3_connection_pointer db2] 154 set ::STMT [sqlite3_prepare $::DB2 "SELECT a FROM t1 ORDER BY a" -1 DUMMY] 155 sqlite3_step $::STMT ;# Cursor points at 000.000.000.000 156 sqlite3_step $::STMT ;# Cursor points at 001.001.001.001 157 158} -tclbody { 159 execsql { 160 BEGIN; 161 INSERT INTO t1 VALUES('201.201.201.201.201', NULL); 162 UPDATE t1 SET a = '202.202.202.202.202' WHERE a LIKE '201%'; 163 COMMIT; 164 } 165} -cleanup { 166 set ::steprc [sqlite3_step $::STMT] 167 set ::column [sqlite3_column_text $::STMT 0] 168 set ::finalrc [sqlite3_finalize $::STMT] 169 170 # There are three possible outcomes here (assuming persistent IO errors): 171 # 172 # 1. If the [sqlite3_step] did not require any IO (required pages in 173 # the cache), then the next row ("002...") may be retrieved 174 # successfully. 175 # 176 # 2. If the [sqlite3_step] does require IO, then [sqlite3_step] returns 177 # SQLITE_ERROR and [sqlite3_finalize] returns IOERR. 178 # 179 # 3. If, after the initial IO error, SQLite tried to rollback the 180 # active transaction and a second IO error was encountered, then 181 # statement $::STMT will have been aborted. This means [sqlite3_stmt] 182 # returns SQLITE_ABORT, and the statement cursor does not move. i.e. 183 # [sqlite3_column] still returns the current row ("001...") and 184 # [sqlite3_finalize] returns SQLITE_OK. 185 # 186 187 do_test shared_ioerr-3.$n.cleanup.1 { 188 expr { 189 $::steprc eq "SQLITE_ROW" || 190 $::steprc eq "SQLITE_ERROR" || 191 $::steprc eq "SQLITE_ABORT" 192 } 193 } {1} 194 do_test shared_ioerr-3.$n.cleanup.2 { 195 expr { 196 ($::steprc eq "SQLITE_ROW" && $::column eq "002.002.002.002.002") || 197 ($::steprc eq "SQLITE_ERROR" && $::column eq "") || 198 ($::steprc eq "SQLITE_ABORT" && $::column eq "001.001.001.001.001") 199 } 200 } {1} 201 do_test shared_ioerr-3.$n.cleanup.3 { 202 expr { 203 ($::steprc eq "SQLITE_ROW" && $::finalrc eq "SQLITE_OK") || 204 ($::steprc eq "SQLITE_ERROR" && $::finalrc eq "SQLITE_IOERR") || 205 ($::steprc eq "SQLITE_ABORT" && $::finalrc eq "SQLITE_OK") 206 } 207 } {1} 208 209# db2 eval {select * from sqlite_master} 210 db2 close 211} 212 213# This is a repeat of the previous test except that this time we 214# are doing a reverse-order scan of the table when the cursor is 215# "saved". 216# 217do_ioerr_test shared_ioerr-3rev -tclprep { 218 sqlite3 db2 test.db 219 execsql { 220 PRAGMA read_uncommitted = 1; 221 PRAGMA cache_size = 10; 222 BEGIN; 223 CREATE TABLE t1(a, b, UNIQUE(a, b)); 224 } db2 225 for {set i 0} {$i < 200} {incr i} { 226 set a [string range [string repeat "[format %03d $i]." 5] 0 end-1] 227 228 set b [string repeat $i 2000] 229 execsql {INSERT INTO t1 VALUES($a, $b)} db2 230 } 231 execsql {COMMIT} db2 232 set ::DB2 [sqlite3_connection_pointer db2] 233 set ::STMT [sqlite3_prepare $::DB2 \ 234 "SELECT a FROM t1 ORDER BY a DESC" -1 DUMMY] 235 sqlite3_step $::STMT ;# Cursor points at 199.199.199.199.199 236 sqlite3_step $::STMT ;# Cursor points at 198.198.198.198.198 237 238} -tclbody { 239 execsql { 240 BEGIN; 241 INSERT INTO t1 VALUES('201.201.201.201.201', NULL); 242 UPDATE t1 SET a = '202.202.202.202.202' WHERE a LIKE '201%'; 243 COMMIT; 244 } 245} -cleanup { 246 set ::steprc [sqlite3_step $::STMT] 247 set ::column [sqlite3_column_text $::STMT 0] 248 set ::finalrc [sqlite3_finalize $::STMT] 249 250 # There are three possible outcomes here (assuming persistent IO errors): 251 # 252 # 1. If the [sqlite3_step] did not require any IO (required pages in 253 # the cache), then the next row ("002...") may be retrieved 254 # successfully. 255 # 256 # 2. If the [sqlite3_step] does require IO, then [sqlite3_step] returns 257 # SQLITE_ERROR and [sqlite3_finalize] returns IOERR. 258 # 259 # 3. If, after the initial IO error, SQLite tried to rollback the 260 # active transaction and a second IO error was encountered, then 261 # statement $::STMT will have been aborted. This means [sqlite3_stmt] 262 # returns SQLITE_ABORT, and the statement cursor does not move. i.e. 263 # [sqlite3_column] still returns the current row ("001...") and 264 # [sqlite3_finalize] returns SQLITE_OK. 265 # 266 267 do_test shared_ioerr-3rev.$n.cleanup.1 { 268 expr { 269 $::steprc eq "SQLITE_ROW" || 270 $::steprc eq "SQLITE_ERROR" || 271 $::steprc eq "SQLITE_ABORT" 272 } 273 } {1} 274 do_test shared_ioerr-3rev.$n.cleanup.2 { 275 expr { 276 ($::steprc eq "SQLITE_ROW" && $::column eq "197.197.197.197.197") || 277 ($::steprc eq "SQLITE_ERROR" && $::column eq "") || 278 ($::steprc eq "SQLITE_ABORT" && $::column eq "198.198.198.198.198") 279 } 280 } {1} 281 do_test shared_ioerr-3rev.$n.cleanup.3 { 282 expr { 283 ($::steprc eq "SQLITE_ROW" && $::finalrc eq "SQLITE_OK") || 284 ($::steprc eq "SQLITE_ERROR" && $::finalrc eq "SQLITE_IOERR") || 285 ($::steprc eq "SQLITE_ABORT" && $::finalrc eq "SQLITE_OK") 286 } 287 } {1} 288 289# db2 eval {select * from sqlite_master} 290 db2 close 291} 292 293# Only run these tests if memory debugging is turned on. 294# 295if {[info command sqlite_malloc_stat]==""} { 296 puts "Skipping malloc tests: not compiled with -DSQLITE_MEMDEBUG..." 297 db close 298 sqlite3_enable_shared_cache $::enable_shared_cache 299 finish_test 300 return 301} 302 303# Provoke a malloc() failure when a cursor position is being saved. This 304# only happens with index cursors (because they malloc() space to save the 305# current key value). It does not happen with tables, because an integer 306# key does not require a malloc() to store. 307# 308# The library should return an SQLITE_NOMEM to the caller. The query that 309# owns the cursor (the one for which the position is not saved) should 310# continue unaffected. 311# 312do_malloc_test 4 -tclprep { 313 sqlite3 db2 test.db 314 execsql { 315 PRAGMA read_uncommitted = 1; 316 BEGIN; 317 CREATE TABLE t1(a, b, UNIQUE(a, b)); 318 } db2 319 for {set i 0} {$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 323 } 324 execsql {COMMIT} 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 $::STMT ;# Cursor points at 1111111111 329} -tclbody { 330 execsql { 331 INSERT INTO t1 VALUES(6, NULL); 332 } 333} -cleanup { 334 do_test shared_malloc-4.$::n.cleanup.1 { 335 set ::rc [sqlite3_step $::STMT] 336 expr {$::rc=="SQLITE_ROW" || $::rc=="SQLITE_ABORT"} 337 } {1} 338 if {$::rc=="SQLITE_ROW"} { 339 do_test shared_malloc-4.$::n.cleanup.2 { 340 sqlite3_column_text $::STMT 0 341 } {2222222222} 342 } 343 do_test shared_malloc-4.$::n.cleanup.3 { 344 sqlite3_finalize $::STMT 345 } {SQLITE_OK} 346# db2 eval {select * from sqlite_master} 347 db2 close 348} 349 350do_malloc_test 5 -tclbody { 351 sqlite3 dbX test.db 352 sqlite3 dbY test.db 353 dbX close 354 dbY close 355} -cleanup { 356 catch {dbX close} 357 catch {dbY close} 358} 359 360do_malloc_test 6 -tclbody { 361 catch {db close} 362 sqlite3_thread_cleanup 363 sqlite3_enable_shared_cache 0 364} -cleanup { 365 sqlite3_enable_shared_cache 1 366} 367 368do_test shared_misuse-7.1 { 369 sqlite3 db test.db 370 catch { 371 sqlite3_enable_shared_cache 0 372 } msg 373 set msg 374} {library routine called out of sequence} 375 376# Again provoke a malloc() failure when a cursor position is being saved, 377# this time during a ROLLBACK operation by some other handle. 378# 379# The library should return an SQLITE_NOMEM to the caller. The query that 380# owns the cursor (the one for which the position is not saved) should 381# be aborted. 382# 383set ::aborted 0 384do_malloc_test 8 -tclprep { 385 sqlite3 db2 test.db 386 execsql { 387 PRAGMA read_uncommitted = 1; 388 BEGIN; 389 CREATE TABLE t1(a, b, UNIQUE(a, b)); 390 } db2 391 for {set i 0} {$i < 2} {incr i} { 392 set a [string repeat $i 10] 393 set b [string repeat $i 2000] 394 execsql {INSERT INTO t1 VALUES($a, $b)} db2 395 } 396 execsql {COMMIT} db2 397 set ::DB2 [sqlite3_connection_pointer db2] 398 set ::STMT [sqlite3_prepare $::DB2 "SELECT a FROM t1 ORDER BY a" -1 DUMMY] 399 sqlite3_step $::STMT ;# Cursor points at 0000000000 400 sqlite3_step $::STMT ;# Cursor points at 1111111111 401} -tclbody { 402 execsql { 403 BEGIN; 404 INSERT INTO t1 VALUES(6, NULL); 405 ROLLBACK; 406 } 407} -cleanup { 408 do_test shared_malloc-8.$::n.cleanup.1 { 409 lrange [execsql { 410 SELECT a FROM t1; 411 } db2] 0 1 412 } {0000000000 1111111111} 413 do_test shared_malloc-8.$::n.cleanup.2 { 414 set rc1 [sqlite3_step $::STMT] 415 set rc2 [sqlite3_finalize $::STMT] 416 if {$rc1=="SQLITE_ABORT"} { 417 incr ::aborted 418 } 419 expr { 420 ($rc1=="SQLITE_DONE" && $rc2=="SQLITE_OK") || 421 ($rc1=="SQLITE_ABORT" && $rc2=="SQLITE_OK") 422 } 423 } {1} 424 db2 close 425} 426do_test shared_malloc-8.X { 427 # Test that one or more queries were aborted due to the malloc() failure. 428 expr $::aborted>=1 429} {1} 430 431catch {db close} 432sqlite3_enable_shared_cache $::enable_shared_cache 433finish_test 434