[sqlite] Remove obsolete reference version 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/test/corruptD.test

-# 2009 June 3
-#
-# 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.
-#
-#***********************************************************************
-#
-# $Id: corruptD.test,v 1.2 2009/06/05 17:09:12 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
-
-#--------------------------------------------------------------------------
-# OVERVIEW
-#
-#   This test file attempts to verify that SQLite does not read past the 
-#   end of any in-memory buffers as a result of corrupted database page 
-#   images. Usually this happens because a field within a database page
-#   that contains an offset to some other structure within the same page
-#   is set to too large a value. A database page contains the following
-#   such fields:
-#
-#     1. The page header field that contains the offset to the first 
-#        free block of space.
-#
-#     2. The first two bytes of all but the last free block on the free-block
-#        list (the offset to the next free block).
-#
-#     3. The page header field containing the number of cells on the page
-#        (implicitly defines the offset to the final element in the cell offset
-#        array, which could potentially be off the end of the page).
-#
-#     4. The page header field containing the offset to the start of the cell
-#        content area.
-#
-#     5. The contents of the cell offset array.
-#
-#     6. The first few bytes of each cell determine the size of the cell
-#        stored within the page, and hence the offset to the final byte of
-#        the cell.
-#
-#   If any of the above fields are set to too large a value, then a buffer
-#   overread may occur. This test script creates and operates on various
-#   strategically corrupted database files to attempt to provoke such buffer
-#   overreads.
-#
-#   Very often, a buffer overread passes unnoticed, particularly in workstation
-#   environments. For this reason, this test script should be run using valgrind
-#   (or similar) in order to verify that no overreads occur.
-#
-# TEST PLAN
-# 
-#   Test cases corruptD-1.* are white-box tests. They attempt to corrupt
-#   one of the above fields, then exercise each part of the code in btree.c
-#   that uses said field.
-#   
-#   Offset variables 1, 2, 3 and 4 are all checked to make sure they
-#   will not result in buffer overruns as part of page initialization in
-#   sqlite3BtreeInitPage(). Offsets 5 and 6 cannot be tested as part of
-#   page initialization, as trying to do so causes a performance hit.
-#
-
-do_test corruptD-1.0 {
-  execsql { 
-    PRAGMA auto_vacuum = 0;
-    PRAGMA page_size = 1024;
-    CREATE TABLE t1(a, b);
-    CREATE INDEX i1 ON t1(a, b);
-  }
-  for {set ii 1} {$ii < 50} {incr ii} {
-    execsql { INSERT INTO t1 VALUES($ii, $ii * $ii) }
-  }
-  execsql {
-    DELETE FROM t1 WHERE a = 10;
-    DELETE FROM t1 WHERE a = 20;
-    DELETE FROM t1 WHERE a = 30;
-    DELETE FROM t1 WHERE a = 40;
-  }
-  forcecopy test.db test.bu
-} {}
-
-proc incr_change_counter {} {
-  hexio_write test.db 24 [
-    hexio_render_int32 [expr [hexio_get_int [hexio_read test.db 24 4]] + 1]
-  ]
-}
-
-proc restore_file {} {
-  db close
-  forcecopy test.bu test.db
-  sqlite3 db test.db
-}
-
-#-------------------------------------------------------------------------
-# The following tests, corruptD-1.1.*, focus on the page header field
-# containing the offset of the first free block in a page. 
-#
-do_test corruptD-1.1.1 {
-  incr_change_counter
-  hexio_write test.db [expr 1024+1] FFFF
-  catchsql { SELECT * FROM t1 ORDER BY rowid }
-} {1 {database disk image is malformed}}
-do_test corruptD-1.1.2 {
-  incr_change_counter
-  hexio_write test.db [expr 1024+1] [hexio_render_int32 1021]
-  catchsql { SELECT * FROM t1 ORDER BY rowid }
-} {1 {database disk image is malformed}}
-
-#-------------------------------------------------------------------------
-# The following tests, corruptD-1.2.*, focus on the offsets contained
-# in the first 2 byte of each free-block on the free-list.
-#
-do_test corruptD-1.2.1 {
-  restore_file
-} {}
-do_test corruptD-1.2.2 {
-} {}
-
-#-------------------------------------------------------------------------
-# The following tests, corruptD-1.4.*, ...
-#
-
-
-#-------------------------------------------------------------------------
-# The following tests, corruptD-1.5.*, focus on the offsets contained
-# in the cell offset array.
-# 
-#   defragmentPage
-#
-
-finish_test