3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
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.
10 #***********************************************************************
11 # This file implements regression tests for SQLite library. The
12 # focus of this file is testing the operation of the library in
13 # "PRAGMA journal_mode=WAL" mode.
15 # More specifically, it tests "locking protocol" errors - errors that
16 # may be caused if one or more SQLite clients does not follow the expected
17 # locking protocol when accessing a wal-mode database. These tests take
18 # quite a while to run.
21 set testdir [file dirname $argv0]
22 source $testdir/tester.tcl
23 source $testdir/lock_common.tcl
24 source $testdir/wal_common.tcl
25 ifcapable !wal {finish_test ; return }
27 set testprefix walprotocol
29 #-------------------------------------------------------------------------
30 # When recovering the contents of a WAL file, a process obtains the WRITER
31 # lock, then locks all other bytes before commencing recovery. If it fails
32 # to lock all other bytes (because some other process is holding a read
33 # lock) it should retry up to 100 times. Then return SQLITE_PROTOCOL to the
34 # caller. Test this (test case 1.3).
36 # Also test the effect of hitting an SQLITE_BUSY while attempting to obtain
37 # the WRITER lock (should be the same). Test case 1.4.
40 PRAGMA journal_mode = wal;
42 INSERT INTO x VALUES('z');
45 proc lock_callback {method filename handle lock} {
51 T script lock_callback
53 sqlite3 db test.db -vfs T
54 execsql { SELECT * FROM x }
56 } [list {0 1 lock exclusive} {1 2 lock exclusive} \
57 {4 1 lock exclusive} {4 1 unlock exclusive} \
58 {5 1 lock exclusive} {5 1 unlock exclusive} \
59 {6 1 lock exclusive} {6 1 unlock exclusive} \
60 {7 1 lock exclusive} {7 1 unlock exclusive} \
61 {1 2 unlock exclusive} \
62 {0 1 unlock exclusive} \
67 sqlite3 db test.db -vfs T
68 execsql { SELECT * FROM x }
70 } [list {0 1 lock exclusive} {1 2 lock exclusive} \
71 {4 1 lock exclusive} {4 1 unlock exclusive} \
72 {5 1 lock exclusive} {5 1 unlock exclusive} \
73 {6 1 lock exclusive} {6 1 unlock exclusive} \
74 {7 1 lock exclusive} {7 1 unlock exclusive} \
75 {1 2 unlock exclusive} \
76 {0 1 unlock exclusive} \
78 proc lock_callback {method filename handle lock} {
79 if {$lock == "1 2 lock exclusive"} { return SQLITE_BUSY }
82 puts "# Warning: This next test case causes SQLite to call xSleep(1) 100 times."
83 puts "# Normally this equates to a delay of roughly 10 seconds, but if SQLite"
84 puts "# is built on unix without HAVE_USLEEP defined, it may be much longer."
88 sqlite3 db test.db -vfs T
89 catchsql { SELECT * FROM x }
90 } {1 {locking protocol}}
92 puts "# Warning: Same again!"
93 proc lock_callback {method filename handle lock} {
94 if {$lock == "0 1 lock exclusive"} { return SQLITE_BUSY }
100 sqlite3 db test.db -vfs T
101 catchsql { SELECT * FROM x }
102 } {1 {locking protocol}}
104 puts "# Warning: Third time!"
105 proc lock_callback {method filename handle lock} {
106 if {$lock == "4 4 lock exclusive"} { return SQLITE_BUSY }
112 sqlite3 db test.db -vfs T
113 catchsql { SELECT * FROM x }
118 #-------------------------------------------------------------------------
121 forcedelete test.db test.db-journal test.db wal
125 PRAGMA auto_vacuum = off;
126 PRAGMA journal_mode = WAL;
128 INSERT INTO b VALUES('Tehran');
129 INSERT INTO b VALUES('Qom');
130 INSERT INTO b VALUES('Markazi');
131 PRAGMA wal_checkpoint;
135 execsql { SELECT * FROM b }
136 } {Tehran Qom Markazi}
138 db eval { SELECT * FROM b } {
139 db eval { INSERT INTO b VALUES('Qazvin') }
140 set r [db2 eval { SELECT * FROM b }]
144 } {Tehran Qom Markazi Qazvin}
147 INSERT INTO b VALUES('Gilan');
148 INSERT INTO b VALUES('Ardabil');
153 faultsim_save_and_close
155 faultsim_restore_and_reopen
157 T script lock_callback
159 proc lock_callback {method file handle spec} {
160 if {$spec == "1 2 unlock exclusive"} {
162 set ::r [catchsql { SELECT * FROM b } db2]
167 puts "# Warning: Another slow test!"
169 execsql { SELECT * FROM b }
170 } {Tehran Qom Markazi Qazvin Gilan Ardabil}
173 } {0 {Tehran Qom Markazi Qazvin Gilan Ardabil}}
178 faultsim_restore_and_reopen
181 T script lock_callback
182 proc lock_callback {method file handle spec} {
183 if {$spec == "1 2 unlock exclusive"} {
185 set ::r [catchsql { SELECT * FROM b } db2]
189 puts "# Warning: Last one!"
191 execsql { SELECT * FROM b }
192 } {Tehran Qom Markazi Qazvin Gilan Ardabil}
195 } {0 {Tehran Qom Markazi Qazvin Gilan Ardabil}}