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    1: # 2010 September 20
    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: # This file implements regression tests for SQLite library.
   12: #
   13: # This file implements tests to verify that ticket [313723c356] has been
   14: # fixed.  
   15: #
   16: 
   17: set testdir [file dirname $argv0]
   18: source $testdir/tester.tcl
   19: source $testdir/malloc_common.tcl
   20: 
   21: ifcapable !wal { finish_test ; return }
   22: 
   23: do_execsql_test tkt-313723c356.1 {
   24:   PRAGMA page_size = 1024;
   25:   PRAGMA journal_mode = WAL;
   26:   CREATE TABLE t1(a, b);
   27:   CREATE INDEX i1 ON t1(a, b);
   28:   INSERT INTO t1 VALUES(randomblob(400), randomblob(400));
   29:   INSERT INTO t1 SELECT randomblob(400), randomblob(400) FROM t1;
   30:   INSERT INTO t1 SELECT randomblob(400), randomblob(400) FROM t1;
   31:   INSERT INTO t1 SELECT randomblob(400), randomblob(400) FROM t1;
   32:   INSERT INTO t1 SELECT randomblob(400), randomblob(400) FROM t1;
   33: } {wal}
   34: faultsim_save_and_close
   35: 
   36: do_faultsim_test tkt-313723c356.2 -faults shmerr* -prep {
   37:   faultsim_restore_and_reopen
   38:   sqlite3 db2 test.db
   39:   db eval  { SELECT * FROM t1 }
   40:   db2 eval { UPDATE t1 SET a = randomblob(399) }
   41:   db2 close
   42: } -body {
   43:   # At this point, the cache contains all of table t1 and none of index i1. The
   44:   # cache is out of date. When the bug existed and the right xShmLock() fails
   45:   # in the following statement, the internal cache of the WAL header was
   46:   # being updated, but the contents of the page-cache not flushed. This causes
   47:   # the integrity-check in the "-test" code to fail, as it is comparing the
   48:   # cached (out-of-date) version of table t1 with the on disk (up-to-date)
   49:   # version of index i1.
   50:   #
   51:   execsql { SELECT min(rowid) FROM t1 }
   52: } -test {
   53:   faultsim_test_result {0 1}
   54:   faultsim_integrity_check
   55: }
   56: 
   57: finish_test