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

     1  # 2007 Aug 13
     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  # 
    12  # This file tests aspects of the malloc failure while parsing
    13  # CREATE TABLE statements in auto_vacuum mode.
    14  #
    15  # $Id: mallocC.test,v 1.10 2009/04/11 16:27:50 drh Exp $
    16  
    17  set testdir [file dirname $argv0]
    18  source $testdir/tester.tcl
    19  source $testdir/malloc_common.tcl
    20  
    21  # Only run these tests if memory debugging is turned on.
    22  #
    23  if {!$MEMDEBUG} {
    24     puts "Skipping mallocC tests: not compiled with -DSQLITE_MEMDEBUG..."
    25     finish_test
    26     return
    27  }
    28  
    29  proc do_mallocC_test {tn args} {
    30    array set ::mallocopts $args
    31    #set sum [allcksum db]
    32  
    33    for {set ::n 1} {true} {incr ::n} {
    34  
    35      # Run the SQL. Malloc number $::n is set to fail. A malloc() failure
    36      # may or may not be reported.
    37      sqlite3_memdebug_fail $::n -repeat 1
    38      do_test mallocC-$tn.$::n.1 {
    39        set res [catchsql [string trim $::mallocopts(-sql)]]
    40        set rc [expr { 
    41          0==[string compare $res {1 {out of memory}}] ||
    42          [db errorcode] == 3082 ||
    43          0==[lindex $res 0]
    44        }]
    45        if {$rc!=1} {
    46          puts "Error: $res"
    47        }
    48        set rc
    49      } {1}
    50  
    51      # If $::n is greater than the number of malloc() calls required to
    52      # execute the SQL, then this test is finished. Break out of the loop.
    53      set nFail [sqlite3_memdebug_fail -1]
    54      if {$nFail==0} {
    55        break
    56      }
    57  
    58      # Recover from the malloc failure.
    59      #
    60      # Update: The new malloc() failure handling means that a transaction may
    61      # still be active even if a malloc() has failed. But when these tests were
    62      # written this was not the case. So do a manual ROLLBACK here so that the
    63      # tests pass.
    64      do_test mallocC-$tn.$::n.2 {
    65        catch {
    66          execsql {
    67            ROLLBACK;
    68          }
    69        }
    70        expr 0
    71      } {0}
    72  
    73      # Checksum the database.
    74      #do_test mallocC-$tn.$::n.3 {
    75      #  allcksum db
    76      #} $sum
    77  
    78      #integrity_check mallocC-$tn.$::n.4
    79    }
    80    unset ::mallocopts
    81  }
    82  
    83  sqlite3_extended_result_codes db 1
    84  
    85  execsql {
    86    PRAGMA auto_vacuum=1;
    87    CREATE TABLE t0(a, b, c);
    88  }
    89  
    90  # The number of memory allocation failures is different on 64-bit
    91  # and 32-bit systems due to larger structures on 64-bit systems
    92  # overflowing the lookaside more often.  To debug problems, it is
    93  # sometimes helpful to reduce the size of the lookaside allocation
    94  # blocks.  But this is normally disabled.
    95  #
    96  if {0} {
    97    db close
    98    sqlite3_shutdown
    99    sqlite3_config_lookaside 50 500
   100    sqlite3_initialize
   101    autoinstall_test_functions
   102    sqlite3 db test.db
   103  }
   104  
   105  do_mallocC_test 1 -sql {
   106    BEGIN;
   107    -- Allocate 32 new root pages. This will exercise the 'extract specific 
   108    -- page from the freelist' code when in auto-vacuum mode (see the
   109    -- allocatePage() routine in btree.c).
   110    CREATE TABLE t1(a UNIQUE, b UNIQUE, c UNIQUE);
   111    CREATE TABLE t2(a UNIQUE, b UNIQUE, c UNIQUE);
   112    CREATE TABLE t3(a UNIQUE, b UNIQUE, c UNIQUE);
   113    CREATE TABLE t4(a UNIQUE, b UNIQUE, c UNIQUE);
   114    CREATE TABLE t5(a UNIQUE, b UNIQUE, c UNIQUE);
   115    CREATE TABLE t6(a UNIQUE, b UNIQUE, c UNIQUE);
   116    CREATE TABLE t7(a UNIQUE, b UNIQUE, c UNIQUE);
   117    CREATE TABLE t8(a UNIQUE, b UNIQUE, c UNIQUE);
   118  
   119    ROLLBACK;
   120  }
   121  
   122  finish_test