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Diffstat (limited to 'test/corruptB.test')
| -rw-r--r-- | test/corruptB.test | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/test/corruptB.test b/test/corruptB.test new file mode 100644 index 0000000..0ff2d6e --- /dev/null +++ b/test/corruptB.test @@ -0,0 +1,189 @@ +# 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 $testdir/tester.tcl + +# Do not use a codec for tests in this file, as the database file is +# manipulated directly using tcl scripts (using the [hexio_write] command). +# +do_not_use_codec + + +do_test corruptB-1.1 { + execsql { + PRAGMA auto_vacuum = 1; + CREATE TABLE t1(x); + INSERT INTO t1 VALUES(randomblob(200)); + INSERT INTO t1 SELECT randomblob(200) FROM t1; + INSERT INTO t1 SELECT randomblob(200) FROM t1; + INSERT INTO t1 SELECT randomblob(200) FROM t1; + INSERT INTO t1 SELECT randomblob(200) FROM t1; + INSERT INTO t1 SELECT randomblob(200) FROM t1; + } + expr {[file size test.db] > (1024*9)} +} {1} +integrity_check corruptB-1.2 + +forcecopy test.db bak.db + +# Set the right-child of a B-Tree rootpage to refer to the root-page itself. +# +do_test corruptB-1.3.1 { + set ::root [execsql {SELECT rootpage FROM sqlite_master}] + set ::offset [expr {($::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 + forcecopy 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 + forcecopy 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; + } +} {} + +forcecopy 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 + forcecopy 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 + forcecopy 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 + forcecopy bak.db test.db + hexio_write test.db [expr $offset+8] [hexio_render_int32 0x6FFFFFFF] +} {4} +do_test corruptB-2.1.2 { + sqlite3 db test.db + catchsql { SELECT * FROM t1 } +} {1 {database disk image is malformed}} + +#--------------------------------------------------------------------------- + +# Corrupt the header-size field of a database record. +# +do_test corruptB-3.1.1 { + db close + forcecopy bak.db test.db + sqlite3 db test.db + set v [string repeat abcdefghij 200] + execsql { + CREATE TABLE t2(a); + INSERT INTO t2 VALUES($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 |