[sql] Import reference version of SQLite 3.17..

third_party/sqlite/sqlite-src-3170000/test/corrupt9.test

+# 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 corruption in the form of duplicate entries on the freelist.
+#
+# $Id: corrupt9.test,v 1.3 2009/06/04 02:47:04 shane 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 {
+  finish_test
+  return
+}
+
+# Return the offset to the first (trunk) page of the freelist.  Return
+# zero of the freelist is empty.
+#
+proc freelist_trunk_offset {filename} {
+  if {[hexio_read $filename 36 4]==0} {return 0}
+  set pgno [hexio_get_int [hexio_read $filename 32 4]]
+  return [expr {($pgno-1)*[hexio_get_int [hexio_read $filename 16 2]]}]
+}
+
+# This procedure looks at the first trunk page of the freelist and
+# corrupts that page by overwriting up to N entries with duplicates
+# of the first entry.
+#
+proc corrupt_freelist {filename N} {
+  set offset [freelist_trunk_offset $filename]
+  if {$offset==0} {error "Freelist is empty"}
+  set cnt [hexio_get_int [hexio_read $filename [expr {$offset+4}] 4]]
+  set pgno [hexio_read $filename [expr {$offset+8}] 4]
+  for {set i 12} {$N>0 && $i<8+4*$cnt} {incr i 4; incr N -1} {
+    hexio_write $filename [expr {$offset+$i}] $pgno
+  }
+}
+
+# Create a database to work with.  Make sure there are plenty of
+# entries on the freelist.
+#
+do_test corrupt9-1.1 {
+  execsql {
+    PRAGMA auto_vacuum=NONE;
+    PRAGMA page_size=1024;
+    CREATE TABLE t1(x);
+    INSERT INTO t1(x) VALUES(1);
+    INSERT INTO t1(x) VALUES(2);
+    INSERT INTO t1(x) SELECT x+2 FROM t1;
+    INSERT INTO t1(x) SELECT x+4 FROM t1;
+    INSERT INTO t1(x) SELECT x+8 FROM t1;
+    INSERT INTO t1(x) SELECT x+16 FROM t1;
+    INSERT INTO t1(x) SELECT x+32 FROM t1;
+    INSERT INTO t1(x) SELECT x+64 FROM t1;
+    INSERT INTO t1(x) SELECT x+128 FROM t1;
+    INSERT INTO t1(x) SELECT x+256 FROM t1;
+    CREATE TABLE t2(a,b);
+    INSERT INTO t2 SELECT x, x*x FROM t1;
+    CREATE INDEX i1 ON t1(x);
+    CREATE INDEX i2 ON t2(b,a);
+    DROP INDEX i2;
+  }
+  expr {[file size test.db]>1024*24}
+} {1}
+integrity_check corrupt9-1.2
+
+# Corrupt the freelist by adding duplicate entries to the freelist.
+# Make sure the corruption is detected.
+#
+db close
+forcecopy test.db test.db-template
+
+corrupt_freelist test.db 1
+sqlite3 db test.db
+do_test corrupt9-2.1 {
+  set x [db eval {PRAGMA integrity_check}]
+  expr {$x!="ok"}
+} {1}
+do_test corrupt9-2.2 {
+  catchsql {
+    CREATE INDEX i2 ON t2(b,a);
+    REINDEX;
+  }
+} {1 {database disk image is malformed}}
+
+
+db close
+forcecopy test.db-template test.db
+corrupt_freelist test.db 2
+sqlite3 db test.db
+do_test corrupt9-3.1 {
+  set x [db eval {PRAGMA integrity_check}]
+  expr {$x!="ok"}
+} {1}
+do_test corrupt9-3.2 {
+  catchsql {
+    CREATE INDEX i2 ON t2(b,a);
+    REINDEX;
+  }
+} {1 {database disk image is malformed}}
+
+db close
+forcecopy test.db-template test.db
+corrupt_freelist test.db 3
+sqlite3 db test.db
+do_test corrupt9-4.1 {
+  set x [db eval {PRAGMA integrity_check}]
+  expr {$x!="ok"}
+} {1}
+do_test corrupt9-4.2 {
+  catchsql {
+    CREATE INDEX i2 ON t2(b,a);
+    REINDEX;
+  }
+} {1 {database disk image is malformed}}
+ 
+
+finish_test