gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/corrupt9.test (about)

     1  # 2008 July 9
     2  #
     3  # The author disclaims copyright to this source code.  In place of
     4  # a legal notice, here is a blessing:
     5  #
     6  #    May you do good and not evil.
     7  #    May you find forgiveness for yourself and forgive others.
     8  #    May you share freely, never taking more than you give.
     9  #
    10  #***********************************************************************
    11  # This file implements regression tests for SQLite library.
    12  #
    13  # This file implements tests to make sure SQLite does not crash or
    14  # segfault if it sees a corrupt database file.  It specifically focuses
    15  # on corruption in the form of duplicate entries on the freelist.
    16  #
    17  # $Id: corrupt9.test,v 1.3 2009/06/04 02:47:04 shane Exp $
    18  
    19  set testdir [file dirname $argv0]
    20  source $testdir/tester.tcl
    21  
    22  # Do not use a codec for tests in this file, as the database file is
    23  # manipulated directly using tcl scripts (using the [hexio_write] command).
    24  #
    25  do_not_use_codec
    26  
    27  # These tests deal with corrupt database files
    28  #
    29  database_may_be_corrupt
    30  
    31  # We must have the page_size pragma for these tests to work.
    32  #
    33  ifcapable !pager_pragmas {
    34    finish_test
    35    return
    36  }
    37  
    38  # Return the offset to the first (trunk) page of the freelist.  Return
    39  # zero of the freelist is empty.
    40  #
    41  proc freelist_trunk_offset {filename} {
    42    if {[hexio_read $filename 36 4]==0} {return 0}
    43    set pgno [hexio_get_int [hexio_read $filename 32 4]]
    44    return [expr {($pgno-1)*[hexio_get_int [hexio_read $filename 16 2]]}]
    45  }
    46  
    47  # This procedure looks at the first trunk page of the freelist and
    48  # corrupts that page by overwriting up to N entries with duplicates
    49  # of the first entry.
    50  #
    51  proc corrupt_freelist {filename N} {
    52    set offset [freelist_trunk_offset $filename]
    53    if {$offset==0} {error "Freelist is empty"}
    54    set cnt [hexio_get_int [hexio_read $filename [expr {$offset+4}] 4]]
    55    set pgno [hexio_read $filename [expr {$offset+8}] 4]
    56    for {set i 12} {$N>0 && $i<8+4*$cnt} {incr i 4; incr N -1} {
    57      hexio_write $filename [expr {$offset+$i}] $pgno
    58    }
    59  }
    60  
    61  # Create a database to work with.  Make sure there are plenty of
    62  # entries on the freelist.
    63  #
    64  do_test corrupt9-1.1 {
    65    execsql {
    66      PRAGMA auto_vacuum=NONE;
    67      PRAGMA page_size=1024;
    68      CREATE TABLE t1(x);
    69      INSERT INTO t1(x) VALUES(1);
    70      INSERT INTO t1(x) VALUES(2);
    71      INSERT INTO t1(x) SELECT x+2 FROM t1;
    72      INSERT INTO t1(x) SELECT x+4 FROM t1;
    73      INSERT INTO t1(x) SELECT x+8 FROM t1;
    74      INSERT INTO t1(x) SELECT x+16 FROM t1;
    75      INSERT INTO t1(x) SELECT x+32 FROM t1;
    76      INSERT INTO t1(x) SELECT x+64 FROM t1;
    77      INSERT INTO t1(x) SELECT x+128 FROM t1;
    78      INSERT INTO t1(x) SELECT x+256 FROM t1;
    79      CREATE TABLE t2(a,b);
    80      INSERT INTO t2 SELECT x, x*x FROM t1;
    81      CREATE INDEX i1 ON t1(x);
    82      CREATE INDEX i2 ON t2(b,a);
    83      DROP INDEX i2;
    84    }
    85    expr {[file size test.db]>1024*24}
    86  } {1}
    87  integrity_check corrupt9-1.2
    88  
    89  # Corrupt the freelist by adding duplicate entries to the freelist.
    90  # Make sure the corruption is detected.
    91  #
    92  db close
    93  forcecopy test.db test.db-template
    94  
    95  corrupt_freelist test.db 1
    96  sqlite3 db test.db
    97  do_test corrupt9-2.1 {
    98    set x [db eval {PRAGMA integrity_check}]
    99    expr {$x!="ok"}
   100  } {1}
   101  do_test corrupt9-2.2 {
   102    catchsql {
   103      CREATE INDEX i2 ON t2(b,a);
   104      REINDEX;
   105    }
   106  } {1 {database disk image is malformed}}
   107  
   108  
   109  db close
   110  forcecopy test.db-template test.db
   111  corrupt_freelist test.db 2
   112  sqlite3 db test.db
   113  do_test corrupt9-3.1 {
   114    set x [db eval {PRAGMA integrity_check}]
   115    expr {$x!="ok"}
   116  } {1}
   117  do_test corrupt9-3.2 {
   118    catchsql {
   119      CREATE INDEX i2 ON t2(b,a);
   120      REINDEX;
   121    }
   122  } {1 {database disk image is malformed}}
   123  
   124  db close
   125  forcecopy test.db-template test.db
   126  corrupt_freelist test.db 3
   127  sqlite3 db test.db
   128  do_test corrupt9-4.1 {
   129    set x [db eval {PRAGMA integrity_check}]
   130    expr {$x!="ok"}
   131  } {1}
   132  do_test corrupt9-4.2 {
   133    catchsql {
   134      CREATE INDEX i2 ON t2(b,a);
   135      REINDEX;
   136    }
   137  } {1 {database disk image is malformed}}
   138   
   139  
   140  finish_test