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+# 2008 July 9
+#
+# 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 file implements regression tests for SQLite library.
+#
+# This file implements tests to make sure SQLite does not crash or
+# segfault if it sees a corrupt database file. It specifically focuses
+# on corrupt pointer map pages.
+#
+# $Id: corrupt8.test,v 1.2 2008/07/11 03:34:10 drh Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Do not use a codec for tests in this file, as the database file is
+# manipulated directly using tcl scripts (using the [hexio_write] command).
+#
+do_not_use_codec
+
+# These tests deal with corrupt database files
+#
+database_may_be_corrupt
+
+# We must have the page_size pragma for these tests to work.
+#
+ifcapable !pager_pragmas||!autovacuum {
+ finish_test
+ return
+}
+
+# Create a database to work with.
+#
+do_test corrupt8-1.1 {
+ execsql {
+ PRAGMA auto_vacuum=1;
+ PRAGMA page_size=1024;
+ CREATE TABLE t1(x);
+ INSERT INTO t1(x) VALUES(1);
+ INSERT INTO t1(x) VALUES(2);
+ INSERT INTO t1(x) SELECT x+2 FROM t1;
+ INSERT INTO t1(x) SELECT x+4 FROM t1;
+ INSERT INTO t1(x) SELECT x+8 FROM t1;
+ INSERT INTO t1(x) SELECT x+16 FROM t1;
+ INSERT INTO t1(x) SELECT x+32 FROM t1;
+ INSERT INTO t1(x) SELECT x+64 FROM t1;
+ INSERT INTO t1(x) SELECT x+128 FROM t1;
+ INSERT INTO t1(x) SELECT x+256 FROM t1;
+ CREATE TABLE t2(a,b);
+ INSERT INTO t2 SELECT x, x*x FROM t1;
+ }
+ expr {[file size test.db]>1024*12}
+} {1}
+integrity_check corrupt8-1.2
+
+# Loop through each ptrmap entry. Corrupt the entry and make sure the
+# corruption is detected by the integrity_check.
+#
+for {set i 1024} {$i<2048} {incr i 5} {
+ set oldval [hexio_read test.db $i 1]
+ if {$oldval==0} break
+ hexio_write test.db $i 00
+ do_test corrupt8-2.$i.0 {
+ db close
+ sqlite3 db test.db
+ set x [db eval {PRAGMA integrity_check}]
+ expr {$x!="ok"}
+ } {1}
+ for {set k 1} {$k<=5} {incr k} {
+ if {$k==$oldval} continue
+ hexio_write test.db $i 0$k
+ do_test corrupt8-2.$i.$k {
+ db close
+ sqlite3 db test.db
+ set x [db eval {PRAGMA integrity_check}]
+ expr {$x!="ok"}
+ } {1}
+ }
+ hexio_write test.db $i 06
+ do_test corrupt8-2.$i.6 {
+ db close
+ sqlite3 db test.db
+ set x [db eval {PRAGMA integrity_check}]
+ expr {$x!="ok"}
+ } {1}
+ hexio_write test.db $i $oldval
+ if {$oldval>2} {
+ set i2 [expr {$i+1+$i%4}]
+ set oldval [hexio_read test.db $i2 1]
+ hexio_write test.db $i2 [format %02x [expr {($oldval+1)&0xff}]]
+ do_test corrupt8-2.$i.7 {
+ db close
+ sqlite3 db test.db
+ set x [db eval {PRAGMA integrity_check}]
+ expr {$x!="ok"}
+ } {1}
+ hexio_write test.db $i2 $oldval
+ }
+}
+
+
+finish_test