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# 2014-01-20
#
# 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 $testdir/tester.tcl
set testprefix corruptH
# Do not use a codec for tests in this file, as the database file is
# manipulated directly using tcl scripts (using the [hexio_write] command).
#
do_not_use_codec
database_may_be_corrupt
# The corruption migrations tested by the code in this file are not detected
# mmap mode.
#
# The reason is that in mmap mode, the different queries may use different
# PgHdr objects for the same page (same data, but different PgHdr container
# objects). And so the corruption is not detected.
#
if {[permutation]=="mmap"} {
finish_test
return
}
# Initialize the database.
#
do_execsql_test 1.1 {
PRAGMA page_size=1024;
CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
INSERT INTO t1 VALUES(1, 'one');
INSERT INTO t1 VALUES(2, 'two');
CREATE TABLE t2(x);
INSERT INTO t2 VALUES(randomblob(200));
INSERT INTO t2 SELECT randomblob(200) FROM t2;
INSERT INTO t2 SELECT randomblob(200) FROM t2;
INSERT INTO t2 SELECT randomblob(200) FROM t2;
INSERT INTO t2 SELECT randomblob(200) FROM t2;
INSERT INTO t2 SELECT randomblob(200) FROM t2;
INSERT INTO t2 SELECT randomblob(200) FROM t2;
} {}
# Corrupt the file so that the root page of t1 is also linked into t2 as
# a leaf page.
#
do_test 1.2 {
db eval { SELECT name, rootpage FROM sqlite_master } {
set r($name) $rootpage
}
db close
hexio_write test.db [expr {($r(t2)-1)*1024 + 11}] [format %.2X $r(t1)]
sqlite3 db test.db
} {}
do_test 1.3 {
breakpoint
db eval { PRAGMA secure_delete=1 }
list [catch {
db eval { SELECT * FROM t1 WHERE a IN (1, 2) } {
db eval { DELETE FROM t2 }
}
} msg] $msg
} {1 {database disk image is malformed}}
#-------------------------------------------------------------------------
reset_db
# Initialize the database.
#
do_execsql_test 2.1 {
PRAGMA auto_vacuum=0;
PRAGMA page_size=1024;
CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
INSERT INTO t1 VALUES(1, 'one');
INSERT INTO t1 VALUES(2, 'two');
CREATE TABLE t3(x);
CREATE TABLE t2(x PRIMARY KEY) WITHOUT ROWID;
INSERT INTO t2 VALUES(randomblob(100));
DROP TABLE t3;
} {}
do_test 2.2 {
db eval { SELECT name, rootpage FROM sqlite_master } {
set r($name) $rootpage
}
db close
set fl [hexio_get_int [hexio_read test.db 32 4]]
hexio_write test.db [expr {($fl-1) * 1024 + 0}] 00000000
hexio_write test.db [expr {($fl-1) * 1024 + 4}] 00000001
hexio_write test.db [expr {($fl-1) * 1024 + 8}] [format %.8X $r(t1)]
hexio_write test.db 36 00000002
sqlite3 db test.db
} {}
# The trick here is that the root page of the tree scanned by the outer
# query is also currently on the free-list. So while the first seek on
# the table (for a==1) works, by the time the second is attempted The
# "INSERT INTO t2..." statements have recycled the root page of t1 and
# used it as an index leaf. Normally, BtreeMovetoUnpacked() detects
# that the PgHdr object associated with said root page does not match
# the cursor (as it is now marked with PgHdr.intKey==0) and returns
# SQLITE_CORRUPT.
#
set res23 {1 {database disk image is malformed}}
do_test 2.3 {
list [catch {
set res [list]
db eval { SELECT * FROM t1 WHERE a IN (1, 2) } {
db eval {
INSERT INTO t2 SELECT randomblob(100) FROM t2;
INSERT INTO t2 SELECT randomblob(100) FROM t2;
INSERT INTO t2 SELECT randomblob(100) FROM t2;
INSERT INTO t2 SELECT randomblob(100) FROM t2;
INSERT INTO t2 SELECT randomblob(100) FROM t2;
}
lappend res $b
}
set res
} msg] $msg
} $res23
#-------------------------------------------------------------------------
reset_db
# Initialize the database.
#
do_execsql_test 3.1 {
PRAGMA page_size=1024;
CREATE TABLE t1(a INTEGER PRIMARY KEY, b);
INSERT INTO t1 VALUES(1, 'one');
INSERT INTO t1 VALUES(2, 'two');
CREATE TABLE t2(c INTEGER PRAGMA KEY, d);
INSERT INTO t2 VALUES(1, randomblob(1100));
} {}
do_test 3.2 {
db eval { SELECT name, rootpage FROM sqlite_master } {
set r($name) $rootpage
}
db close
hexio_write test.db [expr {($r(t2)-1) * 1024 + 1020}] 00000002
sqlite3 db test.db
} {}
do_test 3.3 {
list [catch {
db eval { SELECT * FROM t1 WHERE a IN (1, 2) } {
db eval {
DELETE FROM t2 WHERE c=1;
}
}
} msg] $msg
} {1 {database disk image is malformed}}
finish_test
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