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# 2011 December 16
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
#
# This test simulates an application crash immediately following a
# system call to truncate a file. Specifically, the system call that
# truncates the WAL file if "PRAGMA journal_size_limit" is configured.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !wal {finish_test ; return }
set testprefix walcrash3
db close
testvfs tvfs
tvfs filter {xTruncate xWrite}
tvfs script tvfs_callback
proc tvfs_callback {args} {}
sqlite3 db test.db -vfs tvfs
do_execsql_test 1.1 {
PRAGMA page_size = 1024;
PRAGMA journal_mode = WAL;
PRAGMA wal_autocheckpoint = 128;
PRAGMA journal_size_limit = 16384;
CREATE TABLE t1(a BLOB, b BLOB, UNIQUE(a, b));
INSERT INTO t1 VALUES(randomblob(10), randomblob(1000));
} {wal 128 16384}
proc tvfs_callback {method file arglist} {
if {$::state==1} {
foreach f [glob -nocomplain xx_test.*] { forcedelete $f }
foreach f [glob -nocomplain test.*] { forcecopy $f "xx_$f" }
set ::state 2
}
if {$::state==0 && $method=="xTruncate" && [file tail $file]=="test.db-wal"} {
set ::state 1
}
}
for {set i 2} {$i<1000} {incr i} {
# If the WAL file is truncated within the following, within the following
# xWrite call the [tvfs_callback] makes a copy of the database and WAL
# files set sets $::state to 2. So that the copied files are in the same
# state as the real database and WAL files would be if an application crash
# occurred immediately following the xTruncate().
#
set ::state 0
do_execsql_test 1.$i.1 {
INSERT INTO t1 VALUES(randomblob(10), randomblob(1000));
}
# If a copy was made, open it and run the integrity-check.
#
if {$::state==2} {
sqlite3 db2 xx_test.db
do_test 1.$i.2 { execsql { PRAGMA integrity_check } db2 } "ok"
do_test 1.$i.3 { execsql { SELECT count(*) FROM t1 } db2 } [expr $i-1]
db2 close
}
}
catch { db close }
tvfs delete
#--------------------------------------------------------------------------
#
catch { db close }
forcedelete test.db
do_test 2.1 {
sqlite3 db test.db
execsql {
PRAGMA page_size = 512;
PRAGMA journal_mode = WAL;
PRAGMA wal_autocheckpoint = 128;
CREATE TABLE t1(a PRIMARY KEY, b);
INSERT INTO t1 VALUES(randomblob(25), randomblob(200));
}
for {set i 0} {$i < 1500} {incr i} {
execsql { INSERT INTO t1 VALUES(randomblob(25), randomblob(200)) }
}
db_save
db close
} {}
set nInitialErr [set_test_counter errors]
for {set i 2} {$i<10000 && [set_test_counter errors]==$nInitialErr} {incr i} {
do_test 2.$i.1 {
catch { db close }
db_restore
crashsql -delay 2 -file test.db-wal -seed $i {
SELECT * FROM sqlite_master;
PRAGMA synchronous = full;
PRAGMA wal_checkpoint;
BEGIN;
INSERT INTO t1 VALUES(randomblob(26), randomblob(200));
INSERT INTO t1 VALUES(randomblob(26), randomblob(200));
INSERT INTO t1 VALUES(randomblob(26), randomblob(200));
INSERT INTO t1 VALUES(randomblob(26), randomblob(200));
INSERT INTO t1 VALUES(randomblob(26), randomblob(200));
INSERT INTO t1 VALUES(randomblob(26), randomblob(200));
INSERT INTO t1 VALUES(randomblob(26), randomblob(200));
INSERT INTO t1 VALUES(randomblob(26), randomblob(200));
COMMIT;
}
} {1 {child process exited abnormally}}
do_test 2.$i.2 {
sqlite3 db test.db
execsql { PRAGMA integrity_check }
} {ok}
}
finish_test
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