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third_party/sqlite/src/test/corruptB.test

Index: third_party/sqlite/src/test/corruptB.test
diff --git a/third_party/sqlite/src/test/corruptB.test b/third_party/sqlite/src/test/corruptB.test
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+# 2008 Sep 10
+#
+# 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 loops in the B-Tree structure. A loop is formed in a B-Tree structure
+# when there exists a page that is both an a descendent or ancestor of
+# itself.
+#
+# Also test that an SQLITE_CORRUPT error is returned if a B-Tree page
+# contains a (corrupt) reference to a page greater than the configured
+# maximum page number.
+#
+# $Id: corruptB.test,v 1.4 2009/07/21 19:25:24 danielk1977 Exp $
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# Do not use a codec for tests in this file, as the database file is
+# manipulated directly using tcl scripts (using the [hexio_write] command).
+#
+do_not_use_codec
+
+
+do_test corruptB-1.1 {
+  execsql {
+    PRAGMA auto_vacuum = 1;
+    CREATE TABLE t1(x);
+    INSERT INTO t1 VALUES(randomblob(200));
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+  }
+  expr {[file size test.db] > (1024*9)}
+} {1}
+integrity_check corruptB-1.2
+
+file copy -force test.db bak.db
+
+# Set the right-child of a B-Tree rootpage to refer to the root-page itself.
+#
+do_test corruptB-1.3.1 {
+  set ::root [execsql {SELECT rootpage FROM sqlite_master}]
+  set ::offset [expr {($::root-1)*1024}]
+  hexio_write test.db [expr $offset+8] [hexio_render_int32 $::root]
+} {4}
+do_test corruptB-1.3.2 {
+  sqlite3 db test.db
+  catchsql { SELECT * FROM t1 }
+} {1 {database disk image is malformed}}
+
+# Set the left-child of a cell in a B-Tree rootpage to refer to the 
+# root-page itself.
+#
+do_test corruptB-1.4.1 {
+  db close
+  file copy -force bak.db test.db
+  set cell_offset [hexio_get_int [hexio_read test.db [expr $offset+12] 2]]
+  hexio_write test.db [expr $offset+$cell_offset] [hexio_render_int32 $::root]
+} {4}
+do_test corruptB-1.4.2 {
+  sqlite3 db test.db
+  catchsql { SELECT * FROM t1 }
+} {1 {database disk image is malformed}}
+
+# Now grow the table B-Tree so that it is more than 2 levels high.
+#
+do_test corruptB-1.5.1 {
+  db close
+  file copy -force bak.db test.db
+  sqlite3 db test.db
+  execsql {
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+    INSERT INTO t1 SELECT randomblob(200) FROM t1;
+  }
+} {}
+
+file copy -force test.db bak.db
+
+# Set the right-child pointer of the right-child of the root page to point
+# back to the root page.
+#
+do_test corruptB-1.6.1 {
+  db close
+  set iRightChild [hexio_get_int [hexio_read test.db [expr $offset+8] 4]]
+  set c_offset [expr ($iRightChild-1)*1024]
+  hexio_write test.db [expr $c_offset+8] [hexio_render_int32 $::root]
+} {4}
+do_test corruptB-1.6.2 {
+  sqlite3 db test.db
+  catchsql { SELECT * FROM t1 }
+} {1 {database disk image is malformed}}
+
+# Set the left-child pointer of a cell of the right-child of the root page to
+# point back to the root page.
+#
+do_test corruptB-1.7.1 {
+  db close
+  file copy -force bak.db test.db
+  set cell_offset [hexio_get_int [hexio_read test.db [expr $c_offset+12] 2]]
+  hexio_write test.db [expr $c_offset+$cell_offset] [hexio_render_int32 $::root]
+} {4}
+do_test corruptB-1.7.2 {
+  sqlite3 db test.db
+  catchsql { SELECT * FROM t1 }
+} {1 {database disk image is malformed}}
+
+do_test corruptB-1.8.1 {
+  db close
+  set cell_offset [hexio_get_int [hexio_read test.db [expr $offset+12] 2]]
+  set iLeftChild [
+      hexio_get_int [hexio_read test.db [expr $offset+$cell_offset] 4]
+  ]
+  set c_offset [expr ($iLeftChild-1)*1024]
+  hexio_write test.db [expr $c_offset+8] [hexio_render_int32 $::root]
+} {4}
+do_test corruptB-1.8.2 {
+  sqlite3 db test.db
+  catchsql { SELECT * FROM t1 }
+} {1 {database disk image is malformed}}
+
+# Set the left-child pointer of a cell of the right-child of the root page to
+# point back to the root page.
+#
+do_test corruptB-1.9.1 {
+  db close
+  file copy -force bak.db test.db
+  set cell_offset [hexio_get_int [hexio_read test.db [expr $c_offset+12] 2]]
+  hexio_write test.db [expr $c_offset+$cell_offset] [hexio_render_int32 $::root]
+} {4}
+do_test corruptB-1.9.2 {
+  sqlite3 db test.db
+  catchsql { SELECT * FROM t1 }
+} {1 {database disk image is malformed}}
+
+#---------------------------------------------------------------------------
+
+do_test corruptB-2.1.1 {
+  db close
+  file copy -force bak.db test.db
+  hexio_write test.db [expr $offset+8] [hexio_render_int32 0x6FFFFFFF]
+} {4}
+do_test corruptB-2.1.2 {
+  sqlite3 db test.db
+  catchsql { SELECT * FROM t1 }
+} {1 {database disk image is malformed}}
+
+#---------------------------------------------------------------------------
+
+# Corrupt the header-size field of a database record.
+#
+do_test corruptB-3.1.1 {
+  db close
+  file copy -force bak.db test.db
+  sqlite3 db test.db
+  set v [string repeat abcdefghij 200]
+  execsql {
+    CREATE TABLE t2(a);
+    INSERT INTO t2 VALUES($v);
+  }
+  set t2_root [execsql {SELECT rootpage FROM sqlite_master WHERE name = 't2'}]
+  set iPage [expr ($t2_root-1)*1024]
+  set iCellarray [expr $iPage + 8]
+  set iRecord [hexio_get_int [hexio_read test.db $iCellarray 2]]
+  db close
+  hexio_write test.db [expr $iPage+$iRecord+3] FF00
+} {2}
+do_test corruptB-3.1.2 {
+  sqlite3 db test.db
+  catchsql { SELECT * FROM t2 }
+} {1 {database disk image is malformed}}
+
+finish_test