217 lines
6.0 KiB
Plaintext
217 lines
6.0 KiB
Plaintext
# 2008 May 12
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# This file tests that if sqlite3_release_memory() is called to reclaim
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# memory from a pager that is in the error-state, SQLite does not
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# incorrectly write dirty pages out to the database (not safe to do
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# once the pager is in error state).
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#
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# $Id: ioerr5.test,v 1.5 2008/08/28 18:35:34 danielk1977 Exp $
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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ifcapable !memorymanage||!shared_cache {
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finish_test
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return
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}
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db close
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set ::enable_shared_cache [sqlite3_enable_shared_cache 1]
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set ::soft_limit [sqlite3_soft_heap_limit 1048576]
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# This procedure prepares, steps and finalizes an SQL statement via the
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# UTF-16 APIs. The text representation of an SQLite error code is returned
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# ("SQLITE_OK", "SQLITE_IOERR" etc.). The actual results returned by the
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# SQL statement, if it is a SELECT, are not available.
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#
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# This can be useful for testing because it forces SQLite to make an extra
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# call to sqlite3_malloc() when translating from the supplied UTF-16 to
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# the UTF-8 encoding used internally.
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#
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proc dosql16 {zSql {db db}} {
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set sql [encoding convertto unicode $zSql]
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append sql "\00\00"
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set stmt [sqlite3_prepare16 $db $sql -1 {}]
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sqlite3_step $stmt
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set rc [sqlite3_finalize $stmt]
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}
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proc compilesql16 {zSql {db db}} {
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set sql [encoding convertto unicode $zSql]
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append sql "\00\00"
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set stmt [sqlite3_prepare16 $db $sql -1 {}]
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set rc [sqlite3_finalize $stmt]
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}
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# Open two database connections (handle db and db2) to database "test.db".
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#
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proc opendatabases {} {
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catch {db close}
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catch {db2 close}
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sqlite3 db test.db
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sqlite3 db2 test.db
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db2 cache size 0
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db cache size 0
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execsql {
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pragma page_size=512;
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pragma auto_vacuum=2;
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pragma cache_size=16;
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}
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}
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# Open two database connections and create a single table in the db.
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#
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do_test ioerr5-1.0 {
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opendatabases
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execsql { CREATE TABLE A(Id INTEGER, Name TEXT) }
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} {}
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foreach locking_mode {normal exclusive} {
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set nPage 2
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for {set iFail 1} {$iFail<200} {incr iFail} {
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sqlite3_soft_heap_limit 1048576
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opendatabases
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execsql { pragma locking_mode=exclusive }
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set nRow [db one {SELECT count(*) FROM a}]
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# Dirty (at least) one of the pages in the cache.
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do_test ioerr5-1.$locking_mode-$iFail.1 {
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execsql {
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BEGIN EXCLUSIVE;
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INSERT INTO a VALUES(1, 'ABCDEFGHIJKLMNOP');
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}
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} {}
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# Open a read-only cursor on table "a". If the COMMIT below is
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# interrupted by a persistent IO error, the pager will transition to
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# PAGER_ERROR state. If there are no other read-only cursors open,
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# from there the pager immediately discards all cached data and
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# switches to PAGER_OPEN state. This read-only cursor stops that
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# from happening, leaving the pager stuck in PAGER_ERROR state.
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#
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set channel [db incrblob -readonly a Name [db last_insert_rowid]]
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# Now try to commit the transaction. Cause an IO error to occur
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# within this operation, which moves the pager into the error state.
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#
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set ::sqlite_io_error_persist 1
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set ::sqlite_io_error_pending $iFail
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do_test ioerr5-1.$locking_mode-$iFail.2 {
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set rc [catchsql {COMMIT}]
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list
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} {}
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set ::sqlite_io_error_hit 0
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set ::sqlite_io_error_persist 0
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set ::sqlite_io_error_pending 0
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# Read the contents of the database file into a Tcl variable.
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#
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set fd [open test.db]
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fconfigure $fd -translation binary -encoding binary
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set zDatabase [read $fd]
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close $fd
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# Set a very low soft-limit and then try to compile an SQL statement
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# from UTF-16 text. To do this, SQLite will need to reclaim memory
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# from the pager that is in error state. Including that associated
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# with the dirty page.
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#
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do_test ioerr5-1.$locking_mode-$iFail.3 {
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sqlite3_soft_heap_limit 1024
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compilesql16 "SELECT 10"
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} {SQLITE_OK}
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close $channel
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# Ensure that nothing was written to the database while reclaiming
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# memory from the pager in error state.
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#
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do_test ioerr5-1.$locking_mode-$iFail.4 {
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set fd [open test.db]
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fconfigure $fd -translation binary -encoding binary
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set zDatabase2 [read $fd]
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close $fd
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expr {$zDatabase eq $zDatabase2}
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} {1}
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if {$rc eq [list 0 {}]} {
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do_test ioerr5.1-$locking_mode-$iFail.3 {
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execsql { SELECT count(*) FROM a }
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} [expr $nRow+1]
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break
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}
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}
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}
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# Make sure this test script doesn't leave any files open.
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#
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do_test ioerr5-1.X {
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catch { db close }
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catch { db2 close }
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set sqlite_open_file_count
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} 0
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do_test ioerr5-2.0 {
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sqlite3 db test.db
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execsql { CREATE INDEX i1 ON a(id, name); }
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} {}
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foreach locking_mode {exclusive normal} {
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for {set iFail 1} {$iFail<200} {incr iFail} {
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sqlite3_soft_heap_limit 1048576
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opendatabases
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execsql { pragma locking_mode=exclusive }
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set nRow [db one {SELECT count(*) FROM a}]
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do_test ioerr5-2.$locking_mode-$iFail.1 {
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execsql {
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BEGIN EXCLUSIVE;
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INSERT INTO a VALUES(1, 'ABCDEFGHIJKLMNOP');
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}
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} {}
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set ::sqlite_io_error_persist 1
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set ::sqlite_io_error_pending $iFail
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sqlite3_release_memory 10000
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set error_hit $::sqlite_io_error_hit
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set ::sqlite_io_error_hit 0
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set ::sqlite_io_error_persist 0
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set ::sqlite_io_error_pending 0
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if {$error_hit} {
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do_test ioerr5-2.$locking_mode-$iFail.3a {
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catchsql COMMIT
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} {1 {disk I/O error}}
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} else {
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do_test ioerr5-2.$locking_mode-$iFail.3b {
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execsql COMMIT
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} {}
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break
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}
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}
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}
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# Make sure this test script doesn't leave any files open.
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#
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do_test ioerr5-2.X {
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catch { db close }
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catch { db2 close }
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set sqlite_open_file_count
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} 0
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sqlite3_enable_shared_cache $::enable_shared_cache
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sqlite3_soft_heap_limit $::soft_limit
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finish_test
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