151 lines
4.4 KiB
Plaintext
151 lines
4.4 KiB
Plaintext
# 2012 January 12
|
|
#
|
|
# 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.
|
|
#
|
|
#***********************************************************************
|
|
#
|
|
|
|
set testdir [file dirname $argv0]
|
|
source $testdir/tester.tcl
|
|
set testprefix corruptF
|
|
|
|
# Do not use a codec for tests in this file, as the database file is
|
|
# manipulated directly using tcl scripts (using the [hexio_write] command).
|
|
#
|
|
do_not_use_codec
|
|
|
|
proc str {i} { format %08d $i }
|
|
|
|
# Create a 6 page database containing a single table - t1. Table t1
|
|
# consists of page 2 (the root page) and pages 5 and 6 (leaf pages).
|
|
# Database pages 3 and 4 are on the free list.
|
|
#
|
|
proc create_test_db {} {
|
|
catch { db close }
|
|
forcedelete test.db
|
|
sqlite3 db test.db
|
|
db func str str
|
|
execsql {
|
|
PRAGMA auto_vacuum = 0;
|
|
PRAGMA page_size = 1024;
|
|
CREATE TABLE t1(x); /* root page = 2 */
|
|
CREATE TABLE t2(x); /* root page = 3 */
|
|
CREATE TABLE t3(x); /* root page = 4 */
|
|
|
|
INSERT INTO t1 VALUES(str(1));
|
|
INSERT INTO t1 SELECT str(rowid+1) FROM t1;
|
|
INSERT INTO t1 SELECT str(rowid+2) FROM t1;
|
|
INSERT INTO t1 SELECT str(rowid+4) FROM t1;
|
|
INSERT INTO t1 SELECT str(rowid+8) FROM t1;
|
|
INSERT INTO t1 SELECT str(rowid+16) FROM t1;
|
|
INSERT INTO t1 SELECT str(rowid+32) FROM t1;
|
|
INSERT INTO t1 SELECT str(rowid+64) FROM t1;
|
|
DROP TABLE t2;
|
|
DROP TABLE t3;
|
|
}
|
|
db close
|
|
}
|
|
|
|
do_test 1.1 { create_test_db } {}
|
|
|
|
# Check the db is as we expect. 6 pages in total, with 3 and 4 on the free
|
|
# list. Page 3 is the free list trunk and page 4 is a leaf.
|
|
#
|
|
do_test 1.2 { file size test.db } [expr 6*1024]
|
|
do_test 1.3 { hexio_read test.db 32 4 } 00000003
|
|
do_test 1.4 { hexio_read test.db [expr 2*1024] 12 } 000000000000000100000004
|
|
|
|
# Change the free-list entry to page 6 and reopen the db file.
|
|
do_test 1.5 {
|
|
hexio_write test.db [expr 2*1024 + 8] 00000006
|
|
sqlite3 db test.db
|
|
} {}
|
|
|
|
# Now create a new table in the database file. The root of the new table
|
|
# is page 6, which is also the right-most leaf page in table t1.
|
|
#
|
|
do_execsql_test 1.6 {
|
|
CREATE TABLE t4(x);
|
|
SELECT * FROM sqlite_master;
|
|
} {
|
|
table t1 t1 2 {CREATE TABLE t1(x)}
|
|
table t4 t4 6 {CREATE TABLE t4(x)}
|
|
}
|
|
|
|
# At one point this was causing an assert to fail.
|
|
#
|
|
# This statement opens a cursor on table t1 and does a full table scan. As
|
|
# each row is visited, it is copied into table t4. There is no temporary
|
|
# table.
|
|
#
|
|
# When the t1 cursor reaches page 6 (which is both the right-most leaf of
|
|
# t1 and the root of t4), it continues to iterate through the keys within
|
|
# it (which at this point are keys that have been inserted into t4). And
|
|
# for each row visited, another row is inserted into page 6 - it being the
|
|
# root page of t4. Eventually, page 6 becomes full and the height of the
|
|
# b-tree for table t4 increased. From the point of view of the t1 cursor,
|
|
# this unexpectedly reduces the number of keys on page 6 in the middle of
|
|
# its iteration, which causes an assert() to fail.
|
|
#
|
|
db_save_and_close
|
|
if 1 {
|
|
for {set i 0} {$i < 128} {incr i} {
|
|
db_restore_and_reopen
|
|
do_test 1.7.$i {
|
|
set res [
|
|
catchsql { INSERT INTO t4 SELECT x FROM t1 WHERE rowid>$i }
|
|
]
|
|
if {$res == "0 {}" || $res == "1 {database disk image is malformed}"} {
|
|
set res ""
|
|
}
|
|
set res
|
|
} {}
|
|
}
|
|
}
|
|
|
|
do_test 2.1 { create_test_db } {}
|
|
do_test 2.2 { file size test.db } [expr 6*1024]
|
|
do_test 2.3 { hexio_read test.db 32 4 } 00000003
|
|
do_test 2.4 { hexio_read test.db [expr 2*1024] 12 } 000000000000000100000004
|
|
|
|
# Change the free-list entry to page 5 and reopen the db file.
|
|
do_test 2.5 {
|
|
hexio_write test.db [expr 2*1024 + 8] 00000005
|
|
sqlite3 db test.db
|
|
} {}
|
|
|
|
# Now create a new table in the database file. The root of the new table
|
|
# is page 5, which is also the right-most leaf page in table t1.
|
|
#
|
|
do_execsql_test 2.6 {
|
|
CREATE TABLE t4(x);
|
|
SELECT * FROM sqlite_master;
|
|
} {
|
|
table t1 t1 2 {CREATE TABLE t1(x)}
|
|
table t4 t4 5 {CREATE TABLE t4(x)}
|
|
}
|
|
|
|
db_save_and_close
|
|
for {set i 127} {$i >= 0} {incr i -1} {
|
|
db_restore_and_reopen
|
|
do_test 2.7.$i {
|
|
set res [
|
|
catchsql {
|
|
INSERT INTO t4 SELECT x FROM t1 WHERE rowid<$i ORDER BY rowid DESC
|
|
}
|
|
]
|
|
if {$res == "0 {}" || $res == "1 {database disk image is malformed}"} {
|
|
set res ""
|
|
}
|
|
set res
|
|
} {}
|
|
}
|
|
|
|
finish_test
|
|
|