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      1 # 2007 September 10
      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 #   This test attempts to deadlock SQLite in shared-cache mode.
     13 #     
     14 #
     15 # $Id: thread002.test,v 1.9 2009/03/26 14:48:07 danielk1977 Exp $
     16 
     17 set testdir [file dirname $argv0]
     18 
     19 source $testdir/tester.tcl
     20 if {[run_thread_tests]==0} { finish_test ; return }
     21 
     22 db close
     23 set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
     24 
     25 set ::NTHREAD 10
     26 
     27 do_test thread002.1 {
     28   # Create 3 databases with identical schemas:
     29   for {set ii 0} {$ii < 3} {incr ii} {
     30     file delete -force test${ii}.db
     31     sqlite3 db test${ii}.db
     32     execsql {
     33       CREATE TABLE t1(k, v);
     34       CREATE INDEX t1_i ON t1(v);
     35       INSERT INTO t1(v) VALUES(1.0);
     36     }
     37     db close
     38   }
     39 } {}
     40 
     41 set thread_program {
     42   set ::DB [sqlite3_open test.db]
     43   for {set ii 1} {$ii <= 3} {incr ii} {
     44     set T [lindex $order [expr $ii-1]]
     45     execsql "ATTACH 'test${T}.db' AS aux${ii}"
     46   }
     47 
     48   for {set ii 0} {$ii < 100} {incr ii} {
     49     execsql { SELECT * FROM aux1.t1 }
     50     execsql { INSERT INTO aux1.t1(v) SELECT sum(v) FROM aux2.t1 }
     51   
     52     execsql { SELECT * FROM aux2.t1 }
     53     execsql { INSERT INTO aux2.t1(v) SELECT sum(v) FROM aux3.t1 }
     54   
     55     execsql { SELECT * FROM aux3.t1 }
     56     execsql { INSERT INTO aux3.t1(v) SELECT sum(v) FROM aux1.t1 }
     57 
     58     execsql { CREATE TABLE IF NOT EXISTS aux1.t2(a,b) }
     59     execsql { DROP TABLE IF EXISTS aux1.t2 }
     60 
     61     # if {($ii%10)==0} {puts -nonewline . ; flush stdout}
     62     puts -nonewline . ; flush stdout
     63   }
     64 
     65   sqlite3_close $::DB
     66   list OK
     67 }
     68 
     69 set order_list [list {0 1 2} {0 2 1} {1 0 2} {1 2 0} {2 0 1} {2 1 0}]
     70 
     71 array unset finished
     72 for {set ii 0} {$ii < $::NTHREAD} {incr ii} {
     73   set order [lindex $order_list [expr $ii%6]]
     74   thread_spawn finished($ii) $thread_procs "set order {$order}" $thread_program
     75 }
     76 
     77 # Wait for all threads to finish,  then check they all returned "OK".
     78 #
     79 for {set i 0} {$i < $::NTHREAD} {incr i} {
     80   if {![info exists finished($i)]} {
     81     vwait finished($i)
     82   }
     83   do_test thread002.2.$i {
     84     set ::finished($i)
     85   } OK
     86 }
     87 
     88 # Check all three databases are Ok.
     89 for {set ii 0} {$ii < 3} {incr ii} {
     90   do_test thread002.3.$ii {
     91     sqlite3 db test${ii}.db
     92     set res [list                         \
     93       [execsql {SELECT count(*) FROM t1}] \
     94       [execsql {PRAGMA integrity_check}]  \
     95     ]
     96     db close
     97     set res
     98   } [list [expr 1 + $::NTHREAD*100] ok]
     99 }
    100 
    101 sqlite3_enable_shared_cache $::enable_shared_cache
    102 set sqlite_open_file_count 0
    103 finish_test
    104