0d0614bdc6
used to issue a hint to the VFS to limit mmap space to N bytes. The VFS is free to ignore that hint if desired. However, if "PRAGMA mmap_limit(0)" is used, xFetch is never called. FossilOrigin-Name: 1b37c4effdd03aa2ea938a71b4f22ed27391689b
354 lines
11 KiB
Plaintext
354 lines
11 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 "blocking-checkpoint"
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# operations.
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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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ifcapable !wal {finish_test ; return }
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set testprefix wal5
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proc db_page_count {{file test.db}} { expr [file size $file] / 1024 }
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proc wal_page_count {{file test.db}} { wal_frame_count ${file}-wal 1024 }
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# A checkpoint may be requested either using the C API or by executing
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# an SQL PRAGMA command. To test both methods, all tests in this file are
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# run twice - once using each method to request checkpoints.
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#
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foreach {testprefix do_wal_checkpoint} {
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wal5-pragma {
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proc do_wal_checkpoint { dbhandle args } {
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array set a $args
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foreach key [array names a] {
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if {[lsearch {-mode -db} $key]<0} { error "unknown switch: $key" }
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}
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set sql "PRAGMA "
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if {[info exists a(-db)]} { append sql "$a(-db)." }
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append sql "wal_checkpoint"
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if {[info exists a(-mode)]} { append sql " = $a(-mode)" }
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uplevel [list $dbhandle eval $sql]
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}
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}
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wal5-capi {
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proc do_wal_checkpoint { dbhandle args } {
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set a(-mode) passive
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array set a $args
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foreach key [array names a] {
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if {[lsearch {-mode -db} $key]<0} { error "unknown switch: $key" }
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}
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if {$a(-mode)!="restart" && $a(-mode)!="full"} { set a(-mode) passive }
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set cmd [list sqlite3_wal_checkpoint_v2 $dbhandle $a(-mode)]
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if {[info exists a(-db)]} { lappend sql $a(-db) }
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uplevel $cmd
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}
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}
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} {
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eval $do_wal_checkpoint
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do_multiclient_test tn {
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set ::nBusyHandler 0
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set ::busy_handler_script ""
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proc busyhandler {n} {
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incr ::nBusyHandler
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eval $::busy_handler_script
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return 0
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}
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proc reopen_all {} {
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code1 {db close}
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code2 {db2 close}
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code3 {db3 close}
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code1 {sqlite3 db test.db}
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code2 {sqlite3 db2 test.db}
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code3 {sqlite3 db3 test.db}
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sql1 { PRAGMA synchronous = NORMAL }
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code1 { db busy busyhandler }
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}
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do_test 1.$tn.1 {
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reopen_all
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sql1 {
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PRAGMA page_size = 1024;
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PRAGMA auto_vacuum = 0;
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CREATE TABLE t1(x, y);
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PRAGMA journal_mode = WAL;
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INSERT INTO t1 VALUES(1, zeroblob(1200));
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INSERT INTO t1 VALUES(2, zeroblob(1200));
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INSERT INTO t1 VALUES(3, zeroblob(1200));
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}
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expr [file size test.db] / 1024
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} {2}
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# Have connection 2 grab a read-lock on the current snapshot.
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do_test 1.$tn.2 { sql2 { BEGIN; SELECT x FROM t1 } } {1 2 3}
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# Attempt a checkpoint.
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do_test 1.$tn.3 {
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code1 { do_wal_checkpoint db }
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list [db_page_count] [wal_page_count]
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} {5 9}
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# Write to the db again. The log cannot wrap because of the lock still
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# held by connection 2. The busy-handler has not yet been invoked.
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do_test 1.$tn.4 {
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sql1 { INSERT INTO t1 VALUES(4, zeroblob(1200)) }
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list [db_page_count] [wal_page_count] $::nBusyHandler
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} {5 12 0}
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# Now do a blocking-checkpoint. Set the busy-handler up so that connection
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# 2 releases its lock on the 6th invocation. The checkpointer should then
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# proceed to checkpoint the entire log file. Next write should go to the
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# start of the log file.
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#
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set ::busy_handler_script { if {$n==5} { sql2 COMMIT } }
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do_test 1.$tn.5 {
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code1 { do_wal_checkpoint db -mode restart }
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list [db_page_count] [wal_page_count] $::nBusyHandler
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} {6 12 6}
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do_test 1.$tn.6 {
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set ::nBusyHandler 0
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sql1 { INSERT INTO t1 VALUES(5, zeroblob(1200)) }
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list [db_page_count] [wal_page_count] $::nBusyHandler
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} {6 12 0}
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do_test 1.$tn.7 {
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reopen_all
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list [db_page_count] [wal_page_count] $::nBusyHandler
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} {7 0 0}
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do_test 1.$tn.8 { sql2 { BEGIN ; SELECT x FROM t1 } } {1 2 3 4 5}
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do_test 1.$tn.9 {
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sql1 { INSERT INTO t1 VALUES(6, zeroblob(1200)) }
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list [db_page_count] [wal_page_count] $::nBusyHandler
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} {7 5 0}
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do_test 1.$tn.10 { sql3 { BEGIN ; SELECT x FROM t1 } } {1 2 3 4 5 6}
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set ::busy_handler_script {
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if {$n==5} { sql2 COMMIT }
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if {$n==6} { set ::db_file_size [db_page_count] }
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if {$n==7} { sql3 COMMIT }
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}
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do_test 1.$tn.11 {
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code1 { do_wal_checkpoint db -mode restart }
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list [db_page_count] [wal_page_count] $::nBusyHandler
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} {10 5 8}
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do_test 1.$tn.12 { set ::db_file_size } 10
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}
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#-------------------------------------------------------------------------
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# This block of tests explores checkpoint operations on more than one
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# database file.
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#
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proc setup_and_attach_aux {} {
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sql1 { ATTACH 'test.db2' AS aux }
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sql2 { ATTACH 'test.db2' AS aux }
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sql3 { ATTACH 'test.db2' AS aux }
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sql1 {
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PRAGMA aux.auto_vacuum = 0;
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PRAGMA main.auto_vacuum = 0;
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PRAGMA main.page_size=1024; PRAGMA main.journal_mode=WAL;
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PRAGMA aux.page_size=1024; PRAGMA aux.journal_mode=WAL;
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}
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}
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proc file_page_counts {} {
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list [db_page_count test.db ] \
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[wal_page_count test.db ] \
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[db_page_count test.db2] \
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[wal_page_count test.db2]
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}
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# Test that executing "PRAGMA wal_checkpoint" checkpoints all attached
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# databases, not just the main db. In capi mode, check that this is
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# true if a NULL pointer is passed to wal_checkpoint_v2() in place of a
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# database name.
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do_multiclient_test tn {
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setup_and_attach_aux
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do_test 2.1.$tn.1 {
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sql1 {
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES(1, 2);
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CREATE TABLE aux.t2(a, b);
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INSERT INTO t2 VALUES(1, 2);
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}
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} {}
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do_test 2.2.$tn.2 { file_page_counts } {1 3 1 3}
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do_test 2.1.$tn.3 { code1 { do_wal_checkpoint db } } {0 3 3}
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do_test 2.1.$tn.4 { file_page_counts } {2 3 2 3}
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}
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do_multiclient_test tn {
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setup_and_attach_aux
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do_test 2.2.$tn.1 {
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execsql {
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES(1, 2);
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CREATE TABLE aux.t2(a, b);
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INSERT INTO t2 VALUES(1, 2);
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INSERT INTO t2 VALUES(3, 4);
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}
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} {}
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do_test 2.2.$tn.2 { file_page_counts } {1 3 1 4}
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do_test 2.2.$tn.3 { sql2 { BEGIN; SELECT * FROM t1 } } {1 2}
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do_test 2.2.$tn.4 { code1 { do_wal_checkpoint db -mode restart } } {1 3 3}
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do_test 2.2.$tn.5 { file_page_counts } {2 3 2 4}
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}
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do_multiclient_test tn {
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setup_and_attach_aux
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do_test 2.3.$tn.1 {
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execsql {
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES(1, 2);
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CREATE TABLE aux.t2(a, b);
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INSERT INTO t2 VALUES(1, 2);
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}
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} {}
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do_test 2.3.$tn.2 { file_page_counts } {1 3 1 3}
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do_test 2.3.$tn.3 { sql2 { BEGIN; SELECT * FROM t1 } } {1 2}
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do_test 2.3.$tn.4 { sql1 { INSERT INTO t1 VALUES(3, 4) } } {}
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do_test 2.3.$tn.5 { sql1 { INSERT INTO t2 VALUES(3, 4) } } {}
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do_test 2.3.$tn.6 { file_page_counts } {1 4 1 4}
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do_test 2.3.$tn.7 { code1 { do_wal_checkpoint db -mode full } } {1 4 3}
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# The checkpoint above only writes page 1 of the db file. The other
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# page (page 2) is locked by the read-transaction opened by the
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# [sql2] commmand above. So normally, the db is 1 page in size here.
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# However, in mmap() mode, the db is pre-allocated to 2 pages at the
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# start of the checkpoint, even though page 2 cannot be written.
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set nDb 2
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if {[permutation]=="no-mmap"} {set nDb 1}
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do_test 2.3.$tn.8 { file_page_counts } [list $nDb 4 2 4]
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}
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# Check that checkpoints block on the correct locks. And respond correctly
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# if they cannot obtain those locks. There are three locks that a checkpoint
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# may block on (in the following order):
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#
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# 1. The writer lock: FULL and RESTART checkpoints block until any writer
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# process releases its lock.
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#
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# 2. Readers using part of the log file. FULL and RESTART checkpoints block
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# until readers using part (but not all) of the log file have finished.
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#
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# 3. Readers using any of the log file. After copying data into the
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# database file, RESTART checkpoints block until readers using any part
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# of the log file have finished.
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#
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# This test case involves running a checkpoint while there exist other
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# processes holding all three types of locks.
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#
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foreach {tn1 checkpoint busy_on ckpt_expected expected} {
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1 PASSIVE - {0 3 3} -
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2 TYPO - {0 3 3} -
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3 FULL - {0 4 4} 2
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4 FULL 1 {1 3 3} 1
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5 FULL 2 {1 4 3} 2
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6 FULL 3 {0 4 4} 2
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7 RESTART - {0 4 4} 3
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8 RESTART 1 {1 3 3} 1
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9 RESTART 2 {1 4 3} 2
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10 RESTART 3 {1 4 4} 3
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} {
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do_multiclient_test tn {
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setup_and_attach_aux
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proc busyhandler {x} {
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set ::max_busyhandler $x
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if {$::busy_on!="-" && $x==$::busy_on} { return 1 }
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switch -- $x {
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1 { sql2 "COMMIT ; BEGIN ; SELECT * FROM t1" }
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2 { sql3 "COMMIT" }
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3 { sql2 "COMMIT" }
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}
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return 0
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}
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set ::max_busyhandler -
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do_test 2.4.$tn1.$tn.1 {
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sql1 {
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CREATE TABLE t1(a, b);
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INSERT INTO t1 VALUES(1, 2);
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}
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sql2 { BEGIN; INSERT INTO t1 VALUES(3, 4) }
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sql3 { BEGIN; SELECT * FROM t1 }
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} {1 2}
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do_test 2.4.$tn1.$tn.2 {
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code1 { db busy busyhandler }
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code1 { do_wal_checkpoint db -mode [string tolower $checkpoint] }
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} $ckpt_expected
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do_test 2.4.$tn1.$tn.3 { set ::max_busyhandler } $expected
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}
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}
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do_multiclient_test tn {
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code1 $do_wal_checkpoint
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code2 $do_wal_checkpoint
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code3 $do_wal_checkpoint
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do_test 3.$tn.1 {
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sql1 {
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PRAGMA auto_vacuum = 0;
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PRAGMA journal_mode = WAL;
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PRAGMA synchronous = normal;
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CREATE TABLE t1(x, y);
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}
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sql2 { PRAGMA journal_mode }
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sql3 { PRAGMA journal_mode }
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} {wal}
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do_test 3.$tn.2 { code2 { do_wal_checkpoint db2 } } {0 2 2}
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do_test 3.$tn.3 { code2 { do_wal_checkpoint db2 } } {0 2 2}
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do_test 3.$tn.4 { code3 { do_wal_checkpoint db3 } } {0 2 2}
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code1 {db close}
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code2 {db2 close}
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code3 {db3 close}
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code1 {sqlite3 db test.db}
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code2 {sqlite3 db2 test.db}
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code3 {sqlite3 db3 test.db}
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do_test 3.$tn.5 { sql3 { PRAGMA journal_mode } } {wal}
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do_test 3.$tn.6 { code3 { do_wal_checkpoint db3 } } {0 0 0}
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}
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}
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finish_test
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