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# 2015-03-30
#
# 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.
#
#***********************************************************************
#
# Corruption consisting of a database page that thinks it is a child
# of itself.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix corruptJ
if {[permutation]=="mmap"} {
finish_test
return
}
# 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
# Initialize the database.
#
do_execsql_test 1.1 {
PRAGMA page_size=1024;
PRAGMA auto_vacuum=0;
CREATE TABLE t1(a,b);
WITH RECURSIVE c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<10)
INSERT INTO t1(a,b) SELECT i, zeroblob(700) FROM c;
} {}
db close
# Corrupt the root page of the t1 table such that the left-child pointer
# for the very first cell points back to the root. Then try to DROP the
# table. The clearDatabasePage() routine should not loop.
#
do_test 1.2 {
hexio_write test.db [expr {2*1024-2}] 02
sqlite3 db test.db
catchsql { DROP TABLE t1 }
} {1 {database disk image is malformed}}
# Similar test using a WITHOUT ROWID table
#
do_test 2.1 {
db close
forcedelete test.db
sqlite3 db test.db
db eval {
PRAGMA page_size=1024;
PRAGMA auto_vacuum=0;
CREATE TABLE t1(a,b,PRIMARY KEY(a,b)) WITHOUT ROWID;
WITH RECURSIVE c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<100)
INSERT INTO t1(a,b) SELECT i, zeroblob(200) FROM c;
}
} {}
# The table is three levels deep. Corrupt the left child of an intermediate
# page so that it points back to the root page.
#
do_test 2.2 {
db close
hexio_read test.db [expr {9*1024+391}] 8
} {00000008814D0401}
do_test 2.2b {
hexio_write test.db [expr {9*1024+391}] 00000002
sqlite3 db test.db
catchsql { PRAGMA secure_delete=ON; DROP TABLE t1; }
} {1 {database disk image is malformed}}
finish_test
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