652 lines
18 KiB
Plaintext
652 lines
18 KiB
Plaintext
# 2010 April 13
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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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# This file implements regression tests for SQLite library. The
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# focus of this file is testing the operation of the library in
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# "PRAGMA journal_mode=WAL" mode.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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source $testdir/lock_common.tcl
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source $testdir/wal_common.tcl
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source $testdir/malloc_common.tcl
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ifcapable !wal {finish_test ; return }
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set a_string_counter 1
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proc a_string {n} {
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global a_string_counter
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incr a_string_counter
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string range [string repeat "${a_string_counter}." $n] 1 $n
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}
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db func a_string a_string
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#-------------------------------------------------------------------------
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# When a rollback or savepoint rollback occurs, the client may remove
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# elements from one of the hash tables in the wal-index. This block
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# of test cases tests that nothing appears to go wrong when this is
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# done.
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#
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do_test wal3-1.0 {
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execsql {
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PRAGMA cache_size = 2000;
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PRAGMA page_size = 1024;
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PRAGMA auto_vacuum = off;
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PRAGMA synchronous = normal;
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PRAGMA journal_mode = WAL;
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PRAGMA wal_autocheckpoint = 0;
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BEGIN;
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CREATE TABLE t1(x);
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INSERT INTO t1 VALUES( a_string(800) ); /* 1 */
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 2 */
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 4 */
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 8 */
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 16 */
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 32 */
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 64 */
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 128*/
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 256 */
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 512 */
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 1024 */
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INSERT INTO t1 SELECT a_string(800) FROM t1; /* 2048 */
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INSERT INTO t1 SELECT a_string(800) FROM t1 LIMIT 1970; /* 4018 */
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COMMIT;
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PRAGMA cache_size = 10;
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}
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set x [wal_frame_count test.db-wal 1024]
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if {[permutation]=="memsubsys1"} {
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if {$x==4251 || $x==4290} {set x 4056}
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}
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set x
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} 4056
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for {set i 1} {$i < 50} {incr i} {
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do_test wal3-1.$i.1 {
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set str [a_string 800]
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execsql { UPDATE t1 SET x = $str WHERE rowid = $i }
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lappend L [wal_frame_count test.db-wal 1024]
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execsql {
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BEGIN;
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INSERT INTO t1 SELECT a_string(800) FROM t1 LIMIT 100;
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ROLLBACK;
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PRAGMA integrity_check;
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}
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} {ok}
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# Check that everything looks OK from the point of view of an
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# external connection.
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#
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sqlite3 db2 test.db
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do_test wal3-1.$i.2 {
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execsql { SELECT count(*) FROM t1 } db2
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} 4018
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do_test wal3-1.$i.3 {
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execsql { SELECT x FROM t1 WHERE rowid = $i }
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} $str
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do_test wal3-1.$i.4 {
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execsql { PRAGMA integrity_check } db2
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} {ok}
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db2 close
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# Check that the file-system in its current state can be recovered.
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#
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forcecopy test.db test2.db
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forcecopy test.db-wal test2.db-wal
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forcedelete test2.db-journal
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sqlite3 db2 test2.db
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do_test wal3-1.$i.5 {
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execsql { SELECT count(*) FROM t1 } db2
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} 4018
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do_test wal3-1.$i.6 {
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execsql { SELECT x FROM t1 WHERE rowid = $i }
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} $str
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do_test wal3-1.$i.7 {
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execsql { PRAGMA integrity_check } db2
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} {ok}
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db2 close
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}
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proc byte_is_zero {file offset} {
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if {[file size test.db] <= $offset} { return 1 }
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expr { [hexio_read $file $offset 1] == "00" }
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}
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do_multiclient_test i {
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set testname(1) multiproc
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set testname(2) singleproc
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set tn $testname($i)
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do_test wal3-2.$tn.1 {
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sql1 {
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PRAGMA page_size = 1024;
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PRAGMA journal_mode = WAL;
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}
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sql1 {
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES(1, 'one');
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BEGIN;
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SELECT * FROM t1;
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}
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} {1 one}
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do_test wal3-2.$tn.2 {
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sql2 {
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CREATE TABLE t2(a, b);
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INSERT INTO t2 VALUES(2, 'two');
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BEGIN;
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SELECT * FROM t2;
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}
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} {2 two}
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do_test wal3-2.$tn.3 {
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sql3 {
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CREATE TABLE t3(a, b);
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INSERT INTO t3 VALUES(3, 'three');
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BEGIN;
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SELECT * FROM t3;
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}
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} {3 three}
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# Try to checkpoint the database using [db]. It should be possible to
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# checkpoint everything except the table added by [db3] (checkpointing
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# these frames would clobber the snapshot currently being used by [db2]).
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#
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# After [db2] has committed, a checkpoint can copy the entire log to the
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# database file. Checkpointing after [db3] has committed is therefore a
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# no-op, as the entire log has already been backfilled.
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#
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do_test wal3-2.$tn.4 {
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sql1 {
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COMMIT;
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PRAGMA wal_checkpoint;
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}
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byte_is_zero test.db [expr $AUTOVACUUM ? 4*1024 : 3*1024]
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} {1}
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do_test wal3-2.$tn.5 {
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sql2 {
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COMMIT;
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PRAGMA wal_checkpoint;
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}
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list [byte_is_zero test.db [expr $AUTOVACUUM ? 4*1024 : 3*1024]] \
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[byte_is_zero test.db [expr $AUTOVACUUM ? 5*1024 : 4*1024]]
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} {0 1}
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do_test wal3-2.$tn.6 {
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sql3 {
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COMMIT;
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PRAGMA wal_checkpoint;
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}
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list [byte_is_zero test.db [expr $AUTOVACUUM ? 4*1024 : 3*1024]] \
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[byte_is_zero test.db [expr $AUTOVACUUM ? 5*1024 : 4*1024]]
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} {0 1}
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}
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catch {db close}
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#-------------------------------------------------------------------------
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# Test that that for the simple test:
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#
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# CREATE TABLE x(y);
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# INSERT INTO x VALUES('z');
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# PRAGMA wal_checkpoint;
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#
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# in WAL mode the xSync method is invoked as expected for each of
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# synchronous=off, synchronous=normal and synchronous=full.
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#
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foreach {tn syncmode synccount} {
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1 off
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{}
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2 normal
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{test.db-wal normal test.db normal}
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3 full
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{test.db-wal normal test.db-wal normal test.db-wal normal test.db normal}
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} {
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proc sync_counter {args} {
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foreach {method filename id flags} $args break
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lappend ::syncs [file tail $filename] $flags
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}
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do_test wal3-3.$tn {
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forcedelete test.db test.db-wal test.db-journal
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testvfs T
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T filter {}
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T script sync_counter
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sqlite3 db test.db -vfs T
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execsql "PRAGMA synchronous = $syncmode"
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execsql "PRAGMA checkpoint_fullfsync = 0"
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execsql { PRAGMA journal_mode = WAL }
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execsql { CREATE TABLE filler(a,b,c); }
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set ::syncs [list]
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T filter xSync
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execsql {
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CREATE TABLE x(y);
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INSERT INTO x VALUES('z');
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PRAGMA wal_checkpoint;
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}
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T filter {}
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set ::syncs
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} $synccount
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db close
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T delete
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}
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#-------------------------------------------------------------------------
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# Only one client may run recovery at a time. Test this mechanism.
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#
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# When client-2 tries to open a read transaction while client-1 is
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# running recovery, it fails to obtain a lock on an aReadMark[] slot
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# (because they are all locked by recovery). It then tries to obtain
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# a shared lock on the RECOVER lock to see if there really is a
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# recovery running or not.
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#
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# This block of tests checks the effect of an SQLITE_BUSY or SQLITE_IOERR
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# being returned when client-2 attempts a shared lock on the RECOVER byte.
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#
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# An SQLITE_BUSY should be converted to an SQLITE_BUSY_RECOVERY. An
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# SQLITE_IOERR should be returned to the caller.
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#
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do_test wal3-5.1 {
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faultsim_delete_and_reopen
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execsql {
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PRAGMA journal_mode = WAL;
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES(1, 2);
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INSERT INTO t1 VALUES(3, 4);
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}
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faultsim_save_and_close
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} {}
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testvfs T -default 1
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T script method_callback
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proc method_callback {method args} {
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if {$method == "xShmBarrier"} {
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incr ::barrier_count
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if {$::barrier_count == 2} {
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# This code is executed within the xShmBarrier() callback invoked
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# by the client running recovery as part of writing the recovered
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# wal-index header. If a second client attempts to access the
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# database now, it reads a corrupt (partially written) wal-index
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# header. But it cannot even get that far, as the first client
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# is still holding all the locks (recovery takes an exclusive lock
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# on *all* db locks, preventing access by any other client).
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#
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# If global variable ::wal3_do_lockfailure is non-zero, then set
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# things up so that an IO error occurs within an xShmLock() callback
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# made by the second client (aka [db2]).
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#
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sqlite3 db2 test.db
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if { $::wal3_do_lockfailure } { T filter xShmLock }
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set ::testrc [ catch { db2 eval "SELECT * FROM t1" } ::testmsg ]
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T filter {}
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db2 close
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}
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}
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if {$method == "xShmLock"} {
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foreach {file handle spec} $args break
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if { $spec == "2 1 lock shared" } {
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return SQLITE_IOERR
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}
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}
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return SQLITE_OK
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}
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# Test a normal SQLITE_BUSY return.
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#
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T filter xShmBarrier
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set testrc ""
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set testmsg ""
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set barrier_count 0
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set wal3_do_lockfailure 0
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do_test wal3-5.2 {
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faultsim_restore_and_reopen
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execsql { SELECT * FROM t1 }
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} {1 2 3 4}
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do_test wal3-5.3 {
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list $::testrc $::testmsg
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} {1 {database is locked}}
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db close
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# Test an SQLITE_IOERR return.
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#
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T filter xShmBarrier
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set barrier_count 0
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set wal3_do_lockfailure 1
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set testrc ""
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set testmsg ""
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do_test wal3-5.4 {
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faultsim_restore_and_reopen
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execsql { SELECT * FROM t1 }
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} {1 2 3 4}
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do_test wal3-5.5 {
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list $::testrc $::testmsg
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} {1 {disk I/O error}}
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db close
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T delete
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#-------------------------------------------------------------------------
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# When opening a read-transaction on a database, if the entire log has
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# already been copied to the database file, the reader grabs a special
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# kind of read lock (on aReadMark[0]). This set of test cases tests the
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# outcome of the following:
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#
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# + The reader discovering that between the time when it determined
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# that the log had been completely backfilled and the lock is obtained
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# that a writer has written to the log. In this case the reader should
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# acquire a different read-lock (not aReadMark[0]) and read the new
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# snapshot.
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#
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# + The attempt to obtain the lock on aReadMark[0] fails with SQLITE_BUSY.
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# This can happen if a checkpoint is ongoing. In this case also simply
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# obtain a different read-lock.
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#
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catch {db close}
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testvfs T -default 1
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do_test wal3-6.1.1 {
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forcedelete test.db test.db-journal test.db wal
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sqlite3 db test.db
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execsql { PRAGMA auto_vacuum = off }
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execsql { PRAGMA journal_mode = WAL }
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execsql {
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES('o', 't');
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INSERT INTO t1 VALUES('t', 'f');
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}
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} {}
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do_test wal3-6.1.2 {
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sqlite3 db2 test.db
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sqlite3 db3 test.db
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execsql { BEGIN ; SELECT * FROM t1 } db3
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} {o t t f}
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do_test wal3-6.1.3 {
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execsql { PRAGMA wal_checkpoint } db2
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} {0 4 4}
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# At this point the log file has been fully checkpointed. However,
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# connection [db3] holds a lock that prevents the log from being wrapped.
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# Test case 3.6.1.4 has [db] attempt a read-lock on aReadMark[0]. But
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# as it is obtaining the lock, [db2] appends to the log file.
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#
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T filter xShmLock
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T script lock_callback
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proc lock_callback {method file handle spec} {
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if {$spec == "3 1 lock shared"} {
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# This is the callback for [db] to obtain the read lock on aReadMark[0].
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# Disable future callbacks using [T filter {}] and write to the log
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# file using [db2]. [db3] is preventing [db2] from wrapping the log
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# here, so this is an append.
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T filter {}
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db2 eval { INSERT INTO t1 VALUES('f', 's') }
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}
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return SQLITE_OK
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}
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do_test wal3-6.1.4 {
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execsql {
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BEGIN;
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SELECT * FROM t1;
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}
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} {o t t f f s}
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# [db] should be left holding a read-lock on some slot other than
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# aReadMark[0]. Test this by demonstrating that the read-lock is preventing
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# the log from being wrapped.
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#
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do_test wal3-6.1.5 {
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db3 eval COMMIT
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db2 eval { PRAGMA wal_checkpoint }
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set sz1 [file size test.db-wal]
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db2 eval { INSERT INTO t1 VALUES('s', 'e') }
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set sz2 [file size test.db-wal]
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expr {$sz2>$sz1}
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} {1}
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# Test that if [db2] had not interfered when [db] was trying to grab
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# aReadMark[0], it would have been possible to wrap the log in 3.6.1.5.
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#
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do_test wal3-6.1.6 {
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execsql { COMMIT }
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execsql { PRAGMA wal_checkpoint } db2
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execsql {
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BEGIN;
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SELECT * FROM t1;
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}
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} {o t t f f s s e}
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do_test wal3-6.1.7 {
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db2 eval { PRAGMA wal_checkpoint }
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set sz1 [file size test.db-wal]
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db2 eval { INSERT INTO t1 VALUES('n', 't') }
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set sz2 [file size test.db-wal]
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expr {$sz2==$sz1}
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} {1}
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db3 close
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db2 close
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db close
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do_test wal3-6.2.1 {
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forcedelete test.db test.db-journal test.db wal
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sqlite3 db test.db
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sqlite3 db2 test.db
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execsql { PRAGMA auto_vacuum = off }
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execsql { PRAGMA journal_mode = WAL }
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execsql {
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES('h', 'h');
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INSERT INTO t1 VALUES('l', 'b');
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}
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} {}
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T filter xShmLock
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T script lock_callback
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proc lock_callback {method file handle spec} {
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if {$spec == "3 1 unlock exclusive"} {
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T filter {}
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set ::R [db2 eval {
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BEGIN;
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SELECT * FROM t1;
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}]
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}
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}
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do_test wal3-6.2.2 {
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execsql { PRAGMA wal_checkpoint }
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} {0 4 4}
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do_test wal3-6.2.3 {
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set ::R
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} {h h l b}
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do_test wal3-6.2.4 {
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set sz1 [file size test.db-wal]
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execsql { INSERT INTO t1 VALUES('b', 'c'); }
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set sz2 [file size test.db-wal]
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expr {$sz2 > $sz1}
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} {1}
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do_test wal3-6.2.5 {
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db2 eval { COMMIT }
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execsql { PRAGMA wal_checkpoint }
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set sz1 [file size test.db-wal]
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execsql { INSERT INTO t1 VALUES('n', 'o'); }
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set sz2 [file size test.db-wal]
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expr {$sz2 == $sz1}
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} {1}
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db2 close
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db close
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T delete
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#-------------------------------------------------------------------------
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# When opening a read-transaction on a database, if the entire log has
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# not yet been copied to the database file, the reader grabs a read
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# lock on aReadMark[x], where x>0. The following test cases experiment
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# with the outcome of the following:
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#
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# + The reader discovering that between the time when it read the
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# wal-index header and the lock was obtained that a writer has
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# written to the log. In this case the reader should re-read the
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# wal-index header and lock a snapshot corresponding to the new
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# header.
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#
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# + The value in the aReadMark[x] slot has been modified since it was
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# read.
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#
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catch {db close}
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testvfs T -default 1
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do_test wal3-7.1.1 {
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forcedelete test.db test.db-journal test.db wal
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sqlite3 db test.db
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execsql {
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PRAGMA journal_mode = WAL;
|
|
CREATE TABLE blue(red PRIMARY KEY, green);
|
|
}
|
|
} {wal}
|
|
|
|
T script method_callback
|
|
T filter xOpen
|
|
proc method_callback {method args} {
|
|
if {$method == "xOpen"} { return "reader" }
|
|
}
|
|
do_test wal3-7.1.2 {
|
|
sqlite3 db2 test.db
|
|
execsql { SELECT * FROM blue } db2
|
|
} {}
|
|
|
|
T filter xShmLock
|
|
set ::locks [list]
|
|
proc method_callback {method file handle spec} {
|
|
if {$handle != "reader" } { return }
|
|
if {$method == "xShmLock"} {
|
|
catch { execsql { INSERT INTO blue VALUES(1, 2) } }
|
|
catch { execsql { INSERT INTO blue VALUES(3, 4) } }
|
|
}
|
|
lappend ::locks $spec
|
|
}
|
|
do_test wal3-7.1.3 {
|
|
execsql { SELECT * FROM blue } db2
|
|
} {1 2 3 4}
|
|
do_test wal3-7.1.4 {
|
|
set ::locks
|
|
} {{4 1 lock shared} {4 1 unlock shared} {5 1 lock shared} {5 1 unlock shared}}
|
|
|
|
set ::locks [list]
|
|
proc method_callback {method file handle spec} {
|
|
if {$handle != "reader" } { return }
|
|
if {$method == "xShmLock"} {
|
|
catch { execsql { INSERT INTO blue VALUES(5, 6) } }
|
|
}
|
|
lappend ::locks $spec
|
|
}
|
|
do_test wal3-7.2.1 {
|
|
execsql { SELECT * FROM blue } db2
|
|
} {1 2 3 4 5 6}
|
|
do_test wal3-7.2.2 {
|
|
set ::locks
|
|
} {{5 1 lock shared} {5 1 unlock shared} {4 1 lock shared} {4 1 unlock shared}}
|
|
|
|
db close
|
|
db2 close
|
|
T delete
|
|
|
|
|
|
#-------------------------------------------------------------------------
|
|
# When a connection opens a read-lock on the database, it searches for
|
|
# an aReadMark[] slot that is already set to the mxFrame value for the
|
|
# new transaction. If it cannot find one, it attempts to obtain an
|
|
# exclusive lock on an aReadMark[] slot for the purposes of modifying
|
|
# the value, then drops back to a shared-lock for the duration of the
|
|
# transaction.
|
|
#
|
|
# This test case verifies that if an exclusive lock cannot be obtained
|
|
# on any aReadMark[] slot (because there are already several readers),
|
|
# the client takes a shared-lock on a slot without modifying the value
|
|
# and continues.
|
|
#
|
|
set nConn 50
|
|
if { [string match *BSD $tcl_platform(os)] } { set nConn 25 }
|
|
do_test wal3-9.0 {
|
|
forcedelete test.db test.db-journal test.db wal
|
|
sqlite3 db test.db
|
|
execsql {
|
|
PRAGMA page_size = 1024;
|
|
PRAGMA journal_mode = WAL;
|
|
CREATE TABLE whoami(x);
|
|
INSERT INTO whoami VALUES('nobody');
|
|
}
|
|
} {wal}
|
|
for {set i 0} {$i < $nConn} {incr i} {
|
|
set c db$i
|
|
do_test wal3-9.1.$i {
|
|
sqlite3 $c test.db
|
|
execsql { UPDATE whoami SET x = $c }
|
|
execsql {
|
|
BEGIN;
|
|
SELECT * FROM whoami
|
|
} $c
|
|
} $c
|
|
}
|
|
for {set i 0} {$i < $nConn} {incr i} {
|
|
set c db$i
|
|
do_test wal3-9.2.$i {
|
|
execsql { SELECT * FROM whoami } $c
|
|
} $c
|
|
}
|
|
|
|
set sz [expr 1024 * (2+$AUTOVACUUM)]
|
|
do_test wal3-9.3 {
|
|
for {set i 0} {$i < ($nConn-1)} {incr i} { db$i close }
|
|
execsql { PRAGMA wal_checkpoint }
|
|
byte_is_zero test.db [expr $sz-1024]
|
|
} {1}
|
|
do_test wal3-9.4 {
|
|
db[expr $nConn-1] close
|
|
execsql { PRAGMA wal_checkpoint }
|
|
set sz2 [file size test.db]
|
|
byte_is_zero test.db [expr $sz-1024]
|
|
} {0}
|
|
|
|
do_multiclient_test tn {
|
|
do_test wal3-10.$tn.1 {
|
|
sql1 {
|
|
PRAGMA page_size = 1024;
|
|
CREATE TABLE t1(x);
|
|
PRAGMA journal_mode = WAL;
|
|
PRAGMA wal_autocheckpoint = 100000;
|
|
BEGIN;
|
|
INSERT INTO t1 VALUES(randomblob(800));
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 2
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 4
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 8
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 16
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 32
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 64
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 128
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 256
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 512
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 1024
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 2048
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 4096
|
|
INSERT INTO t1 SELECT randomblob(800) FROM t1; -- 8192
|
|
COMMIT;
|
|
CREATE INDEX i1 ON t1(x);
|
|
}
|
|
|
|
expr {[file size test.db-wal] > [expr 1032*9000]}
|
|
} 1
|
|
|
|
do_test wal3-10.$tn.2 {
|
|
sql2 {PRAGMA integrity_check}
|
|
} {ok}
|
|
}
|
|
|
|
finish_test
|