[sql] Import reference version of SQLite 3.17..

third_party/sqlite/sqlite-src-3170000/test/tester.tcl

+# 2001 September 15
+#
+# 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 some common TCL routines used for regression
+# testing the SQLite library
+#
+# $Id: tester.tcl,v 1.143 2009/04/09 01:23:49 drh Exp $
+
+#-------------------------------------------------------------------------
+# The commands provided by the code in this file to help with creating
+# test cases are as follows:
+#
+# Commands to manipulate the db and the file-system at a high level:
+#
+#      is_relative_file
+#      test_pwd
+#      get_pwd
+#      copy_file              FROM TO
+#      delete_file            FILENAME
+#      drop_all_tables        ?DB?
+#      drop_all_indexes       ?DB?
+#      forcecopy              FROM TO
+#      forcedelete            FILENAME
+#
+# Test the capability of the SQLite version built into the interpreter to
+# determine if a specific test can be run:
+#
+#      capable                EXPR
+#      ifcapable              EXPR
+#
+# Calulate checksums based on database contents:
+#
+#      dbcksum                DB DBNAME
+#      allcksum               ?DB?
+#      cksum                  ?DB?
+#
+# Commands to execute/explain SQL statements:
+#
+#      memdbsql               SQL
+#      stepsql                DB SQL
+#      execsql2               SQL
+#      explain_no_trace       SQL
+#      explain                SQL ?DB?
+#      catchsql               SQL ?DB?
+#      execsql                SQL ?DB?
+#
+# Commands to run test cases:
+#
+#      do_ioerr_test          TESTNAME ARGS...
+#      crashsql               ARGS...
+#      integrity_check        TESTNAME ?DB?
+#      verify_ex_errcode      TESTNAME EXPECTED ?DB?
+#      do_test                TESTNAME SCRIPT EXPECTED
+#      do_execsql_test        TESTNAME SQL EXPECTED
+#      do_catchsql_test       TESTNAME SQL EXPECTED
+#      do_timed_execsql_test  TESTNAME SQL EXPECTED
+#
+# Commands providing a lower level interface to the global test counters:
+#
+#      set_test_counter       COUNTER ?VALUE?
+#      omit_test              TESTNAME REASON ?APPEND?
+#      fail_test              TESTNAME
+#      incr_ntest
+#
+# Command run at the end of each test file:
+#
+#      finish_test
+#
+# Commands to help create test files that run with the "WAL" and other
+# permutations (see file permutations.test):
+#
+#      wal_is_wal_mode
+#      wal_set_journal_mode   ?DB?
+#      wal_check_journal_mode TESTNAME?DB?
+#      permutation
+#      presql
+#
+# Command to test whether or not --verbose=1 was specified on the command
+# line (returns 0 for not-verbose, 1 for verbose and 2 for "verbose in the
+# output file only").
+#
+#      verbose
+#
+
+# Set the precision of FP arithmatic used by the interpreter. And
+# configure SQLite to take database file locks on the page that begins
+# 64KB into the database file instead of the one 1GB in. This means
+# the code that handles that special case can be tested without creating
+# very large database files.
+#
+set tcl_precision 15
+sqlite3_test_control_pending_byte 0x0010000
+
+
+# If the pager codec is available, create a wrapper for the [sqlite3]
+# command that appends "-key {xyzzy}" to the command line. i.e. this:
+#
+#     sqlite3 db test.db
+#
+# becomes
+#
+#     sqlite3 db test.db -key {xyzzy}
+#
+if {[info command sqlite_orig]==""} {
+  rename sqlite3 sqlite_orig
+  proc sqlite3 {args} {
+    if {[llength $args]>=2 && [string index [lindex $args 0] 0]!="-"} {
+      # This command is opening a new database connection.
+      #
+      if {[info exists ::G(perm:sqlite3_args)]} {
+        set args [concat $args $::G(perm:sqlite3_args)]
+      }
+      if {[sqlite_orig -has-codec] && ![info exists ::do_not_use_codec]} {
+        lappend args -key {xyzzy}
+      }
+
+      set res [uplevel 1 sqlite_orig $args]
+      if {[info exists ::G(perm:presql)]} {
+        [lindex $args 0] eval $::G(perm:presql)
+      }
+      if {[info exists ::G(perm:dbconfig)]} {
+        set ::dbhandle [lindex $args 0]
+        uplevel #0 $::G(perm:dbconfig)
+      }
+      set res
+    } else {
+      # This command is not opening a new database connection. Pass the
+      # arguments through to the C implementation as the are.
+      #
+      uplevel 1 sqlite_orig $args
+    }
+  }
+}
+
+proc getFileRetries {} {
+  if {![info exists ::G(file-retries)]} {
+    #
+    # NOTE: Return the default number of retries for [file] operations.  A
+    #       value of zero or less here means "disabled".
+    #
+    return [expr {$::tcl_platform(platform) eq "windows" ? 50 : 0}]
+  }
+  return $::G(file-retries)
+}
+
+proc getFileRetryDelay {} {
+  if {![info exists ::G(file-retry-delay)]} {
+    #
+    # NOTE: Return the default number of milliseconds to wait when retrying
+    #       failed [file] operations.  A value of zero or less means "do not
+    #       wait".
+    #
+    return 100; # TODO: Good default?
+  }
+  return $::G(file-retry-delay)
+}
+
+# Return the string representing the name of the current directory.  On
+# Windows, the result is "normalized" to whatever our parent command shell
+# is using to prevent case-mismatch issues.
+#
+proc get_pwd {} {
+  if {$::tcl_platform(platform) eq "windows"} {
+    #
+    # NOTE: Cannot use [file normalize] here because it would alter the
+    #       case of the result to what Tcl considers canonical, which would
+    #       defeat the purpose of this procedure.
+    #
+    return [string map [list \\ /] \
+        [string trim [exec -- $::env(ComSpec) /c echo %CD%]]]
+  } else {
+    return [pwd]
+  }
+}
+
+# Copy file $from into $to. This is used because some versions of
+# TCL for windows (notably the 8.4.1 binary package shipped with the
+# current mingw release) have a broken "file copy" command.
+#
+proc copy_file {from to} {
+  do_copy_file false $from $to
+}
+
+proc forcecopy {from to} {
+  do_copy_file true $from $to
+}
+
+proc do_copy_file {force from to} {
+  set nRetry [getFileRetries]     ;# Maximum number of retries.
+  set nDelay [getFileRetryDelay]  ;# Delay in ms before retrying.
+
+  # On windows, sometimes even a [file copy -force] can fail. The cause is
+  # usually "tag-alongs" - programs like anti-virus software, automatic backup
+  # tools and various explorer extensions that keep a file open a little longer
+  # than we expect, causing the delete to fail.
+  #
+  # The solution is to wait a short amount of time before retrying the copy.
+  #
+  if {$nRetry > 0} {
+    for {set i 0} {$i<$nRetry} {incr i} {
+      set rc [catch {
+        if {$force} {
+          file copy -force $from $to
+        } else {
+          file copy $from $to
+        }
+      } msg]
+      if {$rc==0} break
+      if {$nDelay > 0} { after $nDelay }
+    }
+    if {$rc} { error $msg }
+  } else {
+    if {$force} {
+      file copy -force $from $to
+    } else {
+      file copy $from $to
+    }
+  }
+}
+
+# Check if a file name is relative
+#
+proc is_relative_file { file } {
+  return [expr {[file pathtype $file] != "absolute"}]
+}
+
+# If the VFS supports using the current directory, returns [pwd];
+# otherwise, it returns only the provided suffix string (which is
+# empty by default).
+#
+proc test_pwd { args } {
+  if {[llength $args] > 0} {
+    set suffix1 [lindex $args 0]
+    if {[llength $args] > 1} {
+      set suffix2 [lindex $args 1]
+    } else {
+      set suffix2 $suffix1
+    }
+  } else {
+    set suffix1 ""; set suffix2 ""
+  }
+  ifcapable curdir {
+    return "[get_pwd]$suffix1"
+  } else {
+    return $suffix2
+  }
+}
+
+# Delete a file or directory
+#
+proc delete_file {args} {
+  do_delete_file false {*}$args
+}
+
+proc forcedelete {args} {
+  do_delete_file true {*}$args
+}
+
+proc do_delete_file {force args} {
+  set nRetry [getFileRetries]     ;# Maximum number of retries.
+  set nDelay [getFileRetryDelay]  ;# Delay in ms before retrying.
+
+  foreach filename $args {
+    # On windows, sometimes even a [file delete -force] can fail just after
+    # a file is closed. The cause is usually "tag-alongs" - programs like
+    # anti-virus software, automatic backup tools and various explorer
+    # extensions that keep a file open a little longer than we expect, causing
+    # the delete to fail.
+    #
+    # The solution is to wait a short amount of time before retrying the
+    # delete.
+    #
+    if {$nRetry > 0} {
+      for {set i 0} {$i<$nRetry} {incr i} {
+        set rc [catch {
+          if {$force} {
+            file delete -force $filename
+          } else {
+            file delete $filename
+          }
+        } msg]
+        if {$rc==0} break
+        if {$nDelay > 0} { after $nDelay }
+      }
+      if {$rc} { error $msg }
+    } else {
+      if {$force} {
+        file delete -force $filename
+      } else {
+        file delete $filename
+      }
+    }
+  }
+}
+
+if {$::tcl_platform(platform) eq "windows"} {
+  proc do_remove_win32_dir {args} {
+    set nRetry [getFileRetries]     ;# Maximum number of retries.
+    set nDelay [getFileRetryDelay]  ;# Delay in ms before retrying.
+
+    foreach dirName $args {
+      # On windows, sometimes even a [remove_win32_dir] can fail just after
+      # a directory is emptied. The cause is usually "tag-alongs" - programs
+      # like anti-virus software, automatic backup tools and various explorer
+      # extensions that keep a file open a little longer than we expect,
+      # causing the delete to fail.
+      #
+      # The solution is to wait a short amount of time before retrying the
+      # removal.
+      #
+      if {$nRetry > 0} {
+        for {set i 0} {$i < $nRetry} {incr i} {
+          set rc [catch {
+            remove_win32_dir $dirName
+          } msg]
+          if {$rc == 0} break
+          if {$nDelay > 0} { after $nDelay }
+        }
+        if {$rc} { error $msg }
+      } else {
+        remove_win32_dir $dirName
+      }
+    }
+  }
+
+  proc do_delete_win32_file {args} {
+    set nRetry [getFileRetries]     ;# Maximum number of retries.
+    set nDelay [getFileRetryDelay]  ;# Delay in ms before retrying.
+
+    foreach fileName $args {
+      # On windows, sometimes even a [delete_win32_file] can fail just after
+      # a file is closed. The cause is usually "tag-alongs" - programs like
+      # anti-virus software, automatic backup tools and various explorer
+      # extensions that keep a file open a little longer than we expect,
+      # causing the delete to fail.
+      #
+      # The solution is to wait a short amount of time before retrying the
+      # delete.
+      #
+      if {$nRetry > 0} {
+        for {set i 0} {$i < $nRetry} {incr i} {
+          set rc [catch {
+            delete_win32_file $fileName
+          } msg]
+          if {$rc == 0} break
+          if {$nDelay > 0} { after $nDelay }
+        }
+        if {$rc} { error $msg }
+      } else {
+        delete_win32_file $fileName
+      }
+    }
+  }
+}
+
+proc execpresql {handle args} {
+  trace remove execution $handle enter [list execpresql $handle]
+  if {[info exists ::G(perm:presql)]} {
+    $handle eval $::G(perm:presql)
+  }
+}
+
+# This command should be called after loading tester.tcl from within
+# all test scripts that are incompatible with encryption codecs.
+#
+proc do_not_use_codec {} {
+  set ::do_not_use_codec 1
+  reset_db
+}
+unset -nocomplain do_not_use_codec
+
+# Return true if the "reserved_bytes" integer on database files is non-zero.
+#
+proc nonzero_reserved_bytes {} {
+  return [sqlite3 -has-codec]
+}
+
+# Print a HELP message and exit
+#
+proc print_help_and_quit {} {
+  puts {Options:
+  --pause                  Wait for user input before continuing
+  --soft-heap-limit=N      Set the soft-heap-limit to N
+  --maxerror=N             Quit after N errors
+  --verbose=(0|1)          Control the amount of output.  Default '1'
+  --output=FILE            set --verbose=2 and output to FILE.  Implies -q
+  -q                       Shorthand for --verbose=0
+  --help                   This message
+}
+  exit 1
+}
+
+# The following block only runs the first time this file is sourced. It
+# does not run in slave interpreters (since the ::cmdlinearg array is
+# populated before the test script is run in slave interpreters).
+#
+if {[info exists cmdlinearg]==0} {
+
+  # Parse any options specified in the $argv array. This script accepts the
+  # following options:
+  #
+  #   --pause
+  #   --soft-heap-limit=NN
+  #   --maxerror=NN
+  #   --malloctrace=N
+  #   --backtrace=N
+  #   --binarylog=N
+  #   --soak=N
+  #   --file-retries=N
+  #   --file-retry-delay=N
+  #   --start=[$permutation:]$testfile
+  #   --match=$pattern
+  #   --verbose=$val
+  #   --output=$filename
+  #   -q                                      Reduce output
+  #   --testdir=$dir                          Run tests in subdirectory $dir
+  #   --help
+  #
+  set cmdlinearg(soft-heap-limit)    0
+  set cmdlinearg(maxerror)        1000
+  set cmdlinearg(malloctrace)        0
+  set cmdlinearg(backtrace)         10
+  set cmdlinearg(binarylog)          0
+  set cmdlinearg(soak)               0
+  set cmdlinearg(file-retries)       0
+  set cmdlinearg(file-retry-delay)   0
+  set cmdlinearg(start)             ""
+  set cmdlinearg(match)             ""
+  set cmdlinearg(verbose)           ""
+  set cmdlinearg(output)            ""
+  set cmdlinearg(testdir)           "testdir"
+
+  set leftover [list]
+  foreach a $argv {
+    switch -regexp -- $a {
+      {^-+pause$} {
+        # Wait for user input before continuing. This is to give the user an
+        # opportunity to connect profiling tools to the process.
+        puts -nonewline "Press RETURN to begin..."
+        flush stdout
+        gets stdin
+      }
+      {^-+soft-heap-limit=.+$} {
+        foreach {dummy cmdlinearg(soft-heap-limit)} [split $a =] break
+      }
+      {^-+maxerror=.+$} {
+        foreach {dummy cmdlinearg(maxerror)} [split $a =] break
+      }
+      {^-+malloctrace=.+$} {
+        foreach {dummy cmdlinearg(malloctrace)} [split $a =] break
+        if {$cmdlinearg(malloctrace)} {
+          sqlite3_memdebug_log start
+        }
+      }
+      {^-+backtrace=.+$} {
+        foreach {dummy cmdlinearg(backtrace)} [split $a =] break
+        sqlite3_memdebug_backtrace $cmdlinearg(backtrace)
+      }
+      {^-+binarylog=.+$} {
+        foreach {dummy cmdlinearg(binarylog)} [split $a =] break
+        set cmdlinearg(binarylog) [file normalize $cmdlinearg(binarylog)]
+      }
+      {^-+soak=.+$} {
+        foreach {dummy cmdlinearg(soak)} [split $a =] break
+        set ::G(issoak) $cmdlinearg(soak)
+      }
+      {^-+file-retries=.+$} {
+        foreach {dummy cmdlinearg(file-retries)} [split $a =] break
+        set ::G(file-retries) $cmdlinearg(file-retries)
+      }
+      {^-+file-retry-delay=.+$} {
+        foreach {dummy cmdlinearg(file-retry-delay)} [split $a =] break
+        set ::G(file-retry-delay) $cmdlinearg(file-retry-delay)
+      }
+      {^-+start=.+$} {
+        foreach {dummy cmdlinearg(start)} [split $a =] break
+
+        set ::G(start:file) $cmdlinearg(start)
+        if {[regexp {(.*):(.*)} $cmdlinearg(start) -> s.perm s.file]} {
+          set ::G(start:permutation) ${s.perm}
+          set ::G(start:file)        ${s.file}
+        }
+        if {$::G(start:file) == ""} {unset ::G(start:file)}
+      }
+      {^-+match=.+$} {
+        foreach {dummy cmdlinearg(match)} [split $a =] break
+
+        set ::G(match) $cmdlinearg(match)
+        if {$::G(match) == ""} {unset ::G(match)}
+      }
+
+      {^-+output=.+$} {
+        foreach {dummy cmdlinearg(output)} [split $a =] break
+        set cmdlinearg(output) [file normalize $cmdlinearg(output)]
+        if {$cmdlinearg(verbose)==""} {
+          set cmdlinearg(verbose) 2
+        }
+      }
+      {^-+verbose=.+$} {
+        foreach {dummy cmdlinearg(verbose)} [split $a =] break
+        if {$cmdlinearg(verbose)=="file"} {
+          set cmdlinearg(verbose) 2
+        } elseif {[string is boolean -strict $cmdlinearg(verbose)]==0} {
+          error "option --verbose= must be set to a boolean or to \"file\""
+        }
+      }
+      {^-+testdir=.*$} {
+        foreach {dummy cmdlinearg(testdir)} [split $a =] break
+      }
+      {.*help.*} {
+         print_help_and_quit
+      }
+      {^-q$} {
+        set cmdlinearg(output) test-out.txt
+        set cmdlinearg(verbose) 2
+      }
+
+      default {
+        if {[file tail $a]==$a} {
+          lappend leftover $a
+        } else {
+          lappend leftover [file normalize $a]
+        }
+      }
+    }
+  }
+  set testdir [file normalize $testdir]
+  set cmdlinearg(TESTFIXTURE_HOME) [pwd]
+  set cmdlinearg(INFO_SCRIPT) [file normalize [info script]]
+  set argv0 [file normalize $argv0]
+  if {$cmdlinearg(testdir)!=""} {
+    file mkdir $cmdlinearg(testdir)
+    cd $cmdlinearg(testdir)
+  }
+  set argv $leftover
+
+  # Install the malloc layer used to inject OOM errors. And the 'automatic'
+  # extensions. This only needs to be done once for the process.
+  #
+  sqlite3_shutdown
+  install_malloc_faultsim 1
+  sqlite3_initialize
+  autoinstall_test_functions
+
+  # If the --binarylog option was specified, create the logging VFS. This
+  # call installs the new VFS as the default for all SQLite connections.
+  #
+  if {$cmdlinearg(binarylog)} {
+    vfslog new binarylog {} vfslog.bin
+  }
+
+  # Set the backtrace depth, if malloc tracing is enabled.
+  #
+  if {$cmdlinearg(malloctrace)} {
+    sqlite3_memdebug_backtrace $cmdlinearg(backtrace)
+  }
+
+  if {$cmdlinearg(output)!=""} {
+    puts "Copying output to file $cmdlinearg(output)"
+    set ::G(output_fd) [open $cmdlinearg(output) w]
+    fconfigure $::G(output_fd) -buffering line
+  }
+
+  if {$cmdlinearg(verbose)==""} {
+    set cmdlinearg(verbose) 1
+  }
+}
+
+# Update the soft-heap-limit each time this script is run. In that
+# way if an individual test file changes the soft-heap-limit, it
+# will be reset at the start of the next test file.
+#
+sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)
+
+# Create a test database
+#
+proc reset_db {} {
+  catch {db close}
+  forcedelete test.db
+  forcedelete test.db-journal
+  forcedelete test.db-wal
+  sqlite3 db ./test.db
+  set ::DB [sqlite3_connection_pointer db]
+  if {[info exists ::SETUP_SQL]} {
+    db eval $::SETUP_SQL
+  }
+}
+reset_db
+
+# Abort early if this script has been run before.
+#
+if {[info exists TC(count)]} return
+
+# Make sure memory statistics are enabled.
+#
+sqlite3_config_memstatus 1
+
+# Initialize the test counters and set up commands to access them.
+# Or, if this is a slave interpreter, set up aliases to write the
+# counters in the parent interpreter.
+#
+if {0==[info exists ::SLAVE]} {
+  set TC(errors)    0
+  set TC(count)     0
+  set TC(fail_list) [list]
+  set TC(omit_list) [list]
+  set TC(warn_list) [list]
+
+  proc set_test_counter {counter args} {
+    if {[llength $args]} {
+      set ::TC($counter) [lindex $args 0]
+    }
+    set ::TC($counter)
+  }
+}
+
+# Record the fact that a sequence of tests were omitted.
+#
+proc omit_test {name reason {append 1}} {
+  set omitList [set_test_counter omit_list]
+  if {$append} {
+    lappend omitList [list $name $reason]
+  }
+  set_test_counter omit_list $omitList
+}
+
+# Record the fact that a test failed.
+#
+proc fail_test {name} {
+  set f [set_test_counter fail_list]
+  lappend f $name
+  set_test_counter fail_list $f
+  set_test_counter errors [expr [set_test_counter errors] + 1]
+
+  set nFail [set_test_counter errors]
+  if {$nFail>=$::cmdlinearg(maxerror)} {
+    output2 "*** Giving up..."
+    finalize_testing
+  }
+}
+
+# Remember a warning message to be displayed at the conclusion of all testing
+#
+proc warning {msg {append 1}} {
+  output2 "Warning: $msg"
+  set warnList [set_test_counter warn_list]
+  if {$append} {
+    lappend warnList $msg
+  }
+  set_test_counter warn_list $warnList
+}
+
+
+# Increment the number of tests run
+#
+proc incr_ntest {} {
+  set_test_counter count [expr [set_test_counter count] + 1]
+}
+
+# Return true if --verbose=1 was specified on the command line. Otherwise,
+# return false.
+#
+proc verbose {} {
+  return $::cmdlinearg(verbose)
+}
+
+# Use the following commands instead of [puts] for test output within
+# this file. Test scripts can still use regular [puts], which is directed
+# to stdout and, if one is open, the --output file.
+#
+# output1: output that should be printed if --verbose=1 was specified.
+# output2: output that should be printed unconditionally.
+# output2_if_no_verbose: output that should be printed only if --verbose=0.
+#
+proc output1 {args} {
+  set v [verbose]
+  if {$v==1} {
+    uplevel output2 $args
+  } elseif {$v==2} {
+    uplevel puts [lrange $args 0 end-1] $::G(output_fd) [lrange $args end end]
+  }
+}
+proc output2 {args} {
+  set nArg [llength $args]
+  uplevel puts $args
+}
+proc output2_if_no_verbose {args} {
+  set v [verbose]
+  if {$v==0} {
+    uplevel output2 $args
+  } elseif {$v==2} {
+    uplevel puts [lrange $args 0 end-1] stdout [lrange $args end end]
+  }
+}
+
+# Override the [puts] command so that if no channel is explicitly 
+# specified the string is written to both stdout and to the file 
+# specified by "--output=", if any.
+#
+proc puts_override {args} {
+  set nArg [llength $args]
+  if {$nArg==1 || ($nArg==2 && [string first [lindex $args 0] -nonewline]==0)} {
+    uplevel puts_original $args
+    if {[info exists ::G(output_fd)]} {
+      uplevel puts [lrange $args 0 end-1] $::G(output_fd) [lrange $args end end]
+    }
+  } else {
+    # A channel was explicitly specified.
+    uplevel puts_original $args
+  }
+}
+rename puts puts_original
+proc puts {args} { uplevel puts_override $args }
+
+
+# Invoke the do_test procedure to run a single test
+#
+# The $expected parameter is the expected result.  The result is the return
+# value from the last TCL command in $cmd.
+#
+# Normally, $expected must match exactly.  But if $expected is of the form
+# "/regexp/" then regular expression matching is used.  If $expected is
+# "~/regexp/" then the regular expression must NOT match.  If $expected is
+# of the form "#/value-list/" then each term in value-list must be numeric
+# and must approximately match the corresponding numeric term in $result.
+# Values must match within 10%.  Or if the $expected term is A..B then the
+# $result term must be in between A and B.
+#
+proc do_test {name cmd expected} {
+  global argv cmdlinearg
+
+  fix_testname name
+
+  sqlite3_memdebug_settitle $name
+
+#  if {[llength $argv]==0} {
+#    set go 1
+#  } else {
+#    set go 0
+#    foreach pattern $argv {
+#      if {[string match $pattern $name]} {
+#        set go 1
+#        break
+#      }
+#    }
+#  }
+
+  if {[info exists ::G(perm:prefix)]} {
+    set name "$::G(perm:prefix)$name"
+  }
+
+  incr_ntest
+  output1 -nonewline $name...
+  flush stdout
+
+  if {![info exists ::G(match)] || [string match $::G(match) $name]} {
+    if {[catch {uplevel #0 "$cmd;\n"} result]} {
+      output2_if_no_verbose -nonewline $name...
+      output2 "\nError: $result"
+      fail_test $name
+    } else {
+      if {[regexp {^[~#]?/.*/$} $expected]} {
+        # "expected" is of the form "/PATTERN/" then the result if correct if
+        # regular expression PATTERN matches the result.  "~/PATTERN/" means
+        # the regular expression must not match.
+        if {[string index $expected 0]=="~"} {
+          set re [string range $expected 2 end-1]
+          if {[string index $re 0]=="*"} {
+            # If the regular expression begins with * then treat it as a glob instead
+            set ok [string match $re $result]
+          } else {
+            set re [string map {# {[-0-9.]+}} $re]
+            set ok [regexp $re $result]
+          }
+          set ok [expr {!$ok}]
+        } elseif {[string index $expected 0]=="#"} {
+          # Numeric range value comparison.  Each term of the $result is matched
+          # against one term of $expect.  Both $result and $expected terms must be
+          # numeric.  The values must match within 10%.  Or if $expected is of the
+          # form A..B then the $result term must be between A and B.
+          set e2 [string range $expected 2 end-1]
+          foreach i $result j $e2 {
+            if {[regexp {^(-?\d+)\.\.(-?\d)$} $j all A B]} {
+              set ok [expr {$i+0>=$A && $i+0<=$B}]
+            } else {
+              set ok [expr {$i+0>=0.9*$j && $i+0<=1.1*$j}]
+            }
+            if {!$ok} break
+          }
+          if {$ok && [llength $result]!=[llength $e2]} {set ok 0}
+        } else {
+          set re [string range $expected 1 end-1]
+          if {[string index $re 0]=="*"} {
+            # If the regular expression begins with * then treat it as a glob instead
+            set ok [string match $re $result]
+          } else {
+            set re [string map {# {[-0-9.]+}} $re]
+            set ok [regexp $re $result]
+          }
+        }
+      } elseif {[regexp {^~?\*.*\*$} $expected]} {
+        # "expected" is of the form "*GLOB*" then the result if correct if
+        # glob pattern GLOB matches the result.  "~/GLOB/" means
+        # the glob must not match.
+        if {[string index $expected 0]=="~"} {
+          set e [string range $expected 1 end]
+          set ok [expr {![string match $e $result]}]
+        } else {
+          set ok [string match $expected $result]
+        }
+      } else {
+        set ok [expr {[string compare $result $expected]==0}]
+      }
+      if {!$ok} {
+        # if {![info exists ::testprefix] || $::testprefix eq ""} {
+        #   error "no test prefix"
+        # }
+        output1 ""
+        output2 "! $name expected: \[$expected\]\n! $name got:      \[$result\]"
+        fail_test $name
+      } else {
+        output1 " Ok"
+      }
+    }
+  } else {
+    output1 " Omitted"
+    omit_test $name "pattern mismatch" 0
+  }
+  flush stdout
+}
+
+proc dumpbytes {s} {
+  set r ""
+  for {set i 0} {$i < [string length $s]} {incr i} {
+    if {$i > 0} {append r " "}
+    append r [format %02X [scan [string index $s $i] %c]]
+  }
+  return $r
+}
+
+proc catchcmd {db {cmd ""}} {
+  global CLI
+  set out [open cmds.txt w]
+  puts $out $cmd
+  close $out
+  set line "exec $CLI $db < cmds.txt"
+  set rc [catch { eval $line } msg]
+  list $rc $msg
+}
+
+proc catchcmdex {db {cmd ""}} {
+  global CLI
+  set out [open cmds.txt w]
+  fconfigure $out -encoding binary -translation binary
+  puts -nonewline $out $cmd
+  close $out
+  set line "exec -keepnewline -- $CLI $db < cmds.txt"
+  set chans [list stdin stdout stderr]
+  foreach chan $chans {
+    catch {
+      set modes($chan) [fconfigure $chan]
+      fconfigure $chan -encoding binary -translation binary -buffering none
+    }
+  }
+  set rc [catch { eval $line } msg]
+  foreach chan $chans {
+    catch {
+      eval fconfigure [list $chan] $modes($chan)
+    }
+  }
+  # puts [dumpbytes $msg]
+  list $rc $msg
+}
+
+proc filepath_normalize {p} {
+  # test cases should be written to assume "unix"-like file paths
+  if {$::tcl_platform(platform)!="unix"} {
+    # lreverse*2 as a hack to remove any unneeded {} after the string map
+    lreverse [lreverse [string map {\\ /} [regsub -nocase -all {[a-z]:[/\\]+} $p {/}]]]
+  } {
+    set p
+  }
+}
+proc do_filepath_test {name cmd expected} {
+  uplevel [list do_test $name [
+    subst -nocommands { filepath_normalize [ $cmd ] }
+  ] [filepath_normalize $expected]]
+}
+
+proc realnum_normalize {r} {
+  # different TCL versions display floating point values differently.
+  string map {1.#INF inf Inf inf .0e e} [regsub -all {(e[+-])0+} $r {\1}]
+}
+proc do_realnum_test {name cmd expected} {
+  uplevel [list do_test $name [
+    subst -nocommands { realnum_normalize [ $cmd ] }
+  ] [realnum_normalize $expected]]
+}
+
+proc fix_testname {varname} {
+  upvar $varname testname
+  if {[info exists ::testprefix]
+   && [string is digit [string range $testname 0 0]]
+  } {
+    set testname "${::testprefix}-$testname"
+  }
+}
+
+proc normalize_list {L} {
+  set L2 [list]
+  foreach l $L {lappend L2 $l}
+  set L2
+}
+
+# Either:
+#
+#   do_execsql_test TESTNAME SQL ?RES?
+#   do_execsql_test -db DB TESTNAME SQL ?RES?
+#
+proc do_execsql_test {args} {
+  set db db
+  if {[lindex $args 0]=="-db"} {
+    set db [lindex $args 1]
+    set args [lrange $args 2 end]
+  }
+
+  if {[llength $args]==2} {
+    foreach {testname sql} $args {}
+    set result ""
+  } elseif {[llength $args]==3} {
+    foreach {testname sql result} $args {}
+  } else {
+    error [string trim {
+      wrong # args: should be "do_execsql_test ?-db DB? testname sql ?result?"
+    }]
+  }
+
+  fix_testname testname
+
+  uplevel do_test                 \
+      [list $testname]            \
+      [list "execsql {$sql} $db"] \
+      [list [list {*}$result]]
+}
+
+proc do_catchsql_test {testname sql result} {
+  fix_testname testname
+  uplevel do_test [list $testname] [list "catchsql {$sql}"] [list $result]
+}
+proc do_timed_execsql_test {testname sql {result {}}} {
+  fix_testname testname
+  uplevel do_test [list $testname] [list "execsql_timed {$sql}"]\
+                                   [list [list {*}$result]]
+}
+proc do_eqp_test {name sql res} {
+  uplevel do_execsql_test $name [list "EXPLAIN QUERY PLAN $sql"] [list $res]
+}
+
+#-------------------------------------------------------------------------
+#   Usage: do_select_tests PREFIX ?SWITCHES? TESTLIST
+#
+# Where switches are:
+#
+#   -errorformat FMTSTRING
+#   -count
+#   -query SQL
+#   -tclquery TCL
+#   -repair TCL
+#
+proc do_select_tests {prefix args} {
+
+  set testlist [lindex $args end]
+  set switches [lrange $args 0 end-1]
+
+  set errfmt ""
+  set countonly 0
+  set tclquery ""
+  set repair ""
+
+  for {set i 0} {$i < [llength $switches]} {incr i} {
+    set s [lindex $switches $i]
+    set n [string length $s]
+    if {$n>=2 && [string equal -length $n $s "-query"]} {
+      set tclquery [list execsql [lindex $switches [incr i]]]
+    } elseif {$n>=2 && [string equal -length $n $s "-tclquery"]} {
+      set tclquery [lindex $switches [incr i]]
+    } elseif {$n>=2 && [string equal -length $n $s "-errorformat"]} {
+      set errfmt [lindex $switches [incr i]]
+    } elseif {$n>=2 && [string equal -length $n $s "-repair"]} {
+      set repair [lindex $switches [incr i]]
+    } elseif {$n>=2 && [string equal -length $n $s "-count"]} {
+      set countonly 1
+    } else {
+      error "unknown switch: $s"
+    }
+  }
+
+  if {$countonly && $errfmt!=""} {
+    error "Cannot use -count and -errorformat together"
+  }
+  set nTestlist [llength $testlist]
+  if {$nTestlist%3 || $nTestlist==0 } {
+    error "SELECT test list contains [llength $testlist] elements"
+  }
+
+  eval $repair
+  foreach {tn sql res} $testlist {
+    if {$tclquery != ""} {
+      execsql $sql
+      uplevel do_test ${prefix}.$tn [list $tclquery] [list [list {*}$res]]
+    } elseif {$countonly} {
+      set nRow 0
+      db eval $sql {incr nRow}
+      uplevel do_test ${prefix}.$tn [list [list set {} $nRow]] [list $res]
+    } elseif {$errfmt==""} {
+      uplevel do_execsql_test ${prefix}.${tn} [list $sql] [list [list {*}$res]]
+    } else {
+      set res [list 1 [string trim [format $errfmt {*}$res]]]
+      uplevel do_catchsql_test ${prefix}.${tn} [list $sql] [list $res]
+    }
+    eval $repair
+  }
+
+}
+
+proc delete_all_data {} {
+  db eval {SELECT tbl_name AS t FROM sqlite_master WHERE type = 'table'} {
+    db eval "DELETE FROM '[string map {' ''} $t]'"
+  }
+}
+
+# Run an SQL script.
+# Return the number of microseconds per statement.
+#
+proc speed_trial {name numstmt units sql} {
+  output2 -nonewline [format {%-21.21s } $name...]
+  flush stdout
+  set speed [time {sqlite3_exec_nr db $sql}]
+  set tm [lindex $speed 0]
+  if {$tm == 0} {
+    set rate [format %20s "many"]
+  } else {
+    set rate [format %20.5f [expr {1000000.0*$numstmt/$tm}]]
+  }
+  set u2 $units/s
+  output2 [format {%12d uS %s %s} $tm $rate $u2]
+  global total_time
+  set total_time [expr {$total_time+$tm}]
+  lappend ::speed_trial_times $name $tm
+}
+proc speed_trial_tcl {name numstmt units script} {
+  output2 -nonewline [format {%-21.21s } $name...]
+  flush stdout
+  set speed [time {eval $script}]
+  set tm [lindex $speed 0]
+  if {$tm == 0} {
+    set rate [format %20s "many"]
+  } else {
+    set rate [format %20.5f [expr {1000000.0*$numstmt/$tm}]]
+  }
+  set u2 $units/s
+  output2 [format {%12d uS %s %s} $tm $rate $u2]
+  global total_time
+  set total_time [expr {$total_time+$tm}]
+  lappend ::speed_trial_times $name $tm
+}
+proc speed_trial_init {name} {
+  global total_time
+  set total_time 0
+  set ::speed_trial_times [list]
+  sqlite3 versdb :memory:
+  set vers [versdb one {SELECT sqlite_source_id()}]
+  versdb close
+  output2 "SQLite $vers"
+}
+proc speed_trial_summary {name} {
+  global total_time
+  output2 [format {%-21.21s %12d uS TOTAL} $name $total_time]
+
+  if { 0 } {
+    sqlite3 versdb :memory:
+    set vers [lindex [versdb one {SELECT sqlite_source_id()}] 0]
+    versdb close
+    output2 "CREATE TABLE IF NOT EXISTS time(version, script, test, us);"
+    foreach {test us} $::speed_trial_times {
+      output2 "INSERT INTO time VALUES('$vers', '$name', '$test', $us);"
+    }
+  }
+}
+
+# Run this routine last
+#
+proc finish_test {} {
+  catch {db close}
+  catch {db1 close}
+  catch {db2 close}
+  catch {db3 close}
+  if {0==[info exists ::SLAVE]} { finalize_testing }
+}
+proc finalize_testing {} {
+  global sqlite_open_file_count
+
+  set omitList [set_test_counter omit_list]
+
+  catch {db close}
+  catch {db2 close}
+  catch {db3 close}
+
+  vfs_unlink_test
+  sqlite3 db {}
+  # sqlite3_clear_tsd_memdebug
+  db close
+  sqlite3_reset_auto_extension
+
+  sqlite3_soft_heap_limit 0
+  set nTest [incr_ntest]
+  set nErr [set_test_counter errors]
+
+  set nKnown 0
+  if {[file readable known-problems.txt]} {
+    set fd [open known-problems.txt]
+    set content [read $fd]
+    close $fd
+    foreach x $content {set known_error($x) 1}
+    foreach x [set_test_counter fail_list] {
+      if {[info exists known_error($x)]} {incr nKnown}
+    }
+  }
+  if {$nKnown>0} {
+    output2 "[expr {$nErr-$nKnown}] new errors and $nKnown known errors\
+         out of $nTest tests"
+  } else {
+    set cpuinfo {}
+    if {[catch {exec hostname} hname]==0} {set cpuinfo [string trim $hname]}
+    append cpuinfo " $::tcl_platform(os)"
+    append cpuinfo " [expr {$::tcl_platform(pointerSize)*8}]-bit"
+    append cpuinfo " [string map {E -e} $::tcl_platform(byteOrder)]"
+    output2 "SQLite [sqlite3 -sourceid]"
+    output2 "$nErr errors out of $nTest tests on $cpuinfo"
+  }
+  if {$nErr>$nKnown} {
+    output2 -nonewline "!Failures on these tests:"
+    foreach x [set_test_counter fail_list] {
+      if {![info exists known_error($x)]} {output2 -nonewline " $x"}
+    }
+    output2 ""
+  }
+  foreach warning [set_test_counter warn_list] {
+    output2 "Warning: $warning"
+  }
+  run_thread_tests 1
+  if {[llength $omitList]>0} {
+    output2 "Omitted test cases:"
+    set prec {}
+    foreach {rec} [lsort $omitList] {
+      if {$rec==$prec} continue
+      set prec $rec
+      output2 [format {.  %-12s %s} [lindex $rec 0] [lindex $rec 1]]
+    }
+  }
+  if {$nErr>0 && ![working_64bit_int]} {
+    output2 "******************************************************************"
+    output2 "N.B.:  The version of TCL that you used to build this test harness"
+    output2 "is defective in that it does not support 64-bit integers.  Some or"
+    output2 "all of the test failures above might be a result from this defect"
+    output2 "in your TCL build."
+    output2 "******************************************************************"
+  }
+  if {$::cmdlinearg(binarylog)} {
+    vfslog finalize binarylog
+  }
+  if {$sqlite_open_file_count} {
+    output2 "$sqlite_open_file_count files were left open"
+    incr nErr
+  }
+  if {[lindex [sqlite3_status SQLITE_STATUS_MALLOC_COUNT 0] 1]>0 ||
+              [sqlite3_memory_used]>0} {
+    output2 "Unfreed memory: [sqlite3_memory_used] bytes in\
+         [lindex [sqlite3_status SQLITE_STATUS_MALLOC_COUNT 0] 1] allocations"
+    incr nErr
+    ifcapable memdebug||mem5||(mem3&&debug) {
+      output2 "Writing unfreed memory log to \"./memleak.txt\""
+      sqlite3_memdebug_dump ./memleak.txt
+    }
+  } else {
+    output2 "All memory allocations freed - no leaks"
+    ifcapable memdebug||mem5 {
+      sqlite3_memdebug_dump ./memusage.txt
+    }
+  }
+  show_memstats
+  output2 "Maximum memory usage: [sqlite3_memory_highwater 1] bytes"
+  output2 "Current memory usage: [sqlite3_memory_highwater] bytes"
+  if {[info commands sqlite3_memdebug_malloc_count] ne ""} {
+    output2 "Number of malloc()  : [sqlite3_memdebug_malloc_count] calls"
+  }
+  if {$::cmdlinearg(malloctrace)} {
+    output2 "Writing mallocs.sql..."
+    memdebug_log_sql
+    sqlite3_memdebug_log stop
+    sqlite3_memdebug_log clear
+
+    if {[sqlite3_memory_used]>0} {
+      output2 "Writing leaks.sql..."
+      sqlite3_memdebug_log sync
+      memdebug_log_sql leaks.sql
+    }
+  }
+  foreach f [glob -nocomplain test.db-*-journal] {
+    forcedelete $f
+  }
+  foreach f [glob -nocomplain test.db-mj*] {
+    forcedelete $f
+  }
+  exit [expr {$nErr>0}]
+}
+
+# Display memory statistics for analysis and debugging purposes.
+#
+proc show_memstats {} {
+  set x [sqlite3_status SQLITE_STATUS_MEMORY_USED 0]
+  set y [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0]
+  set val [format {now %10d  max %10d  max-size %10d} \
+              [lindex $x 1] [lindex $x 2] [lindex $y 2]]
+  output1 "Memory used:          $val"
+  set x [sqlite3_status SQLITE_STATUS_MALLOC_COUNT 0]
+  set val [format {now %10d  max %10d} [lindex $x 1] [lindex $x 2]]
+  output1 "Allocation count:     $val"
+  set x [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0]
+  set y [sqlite3_status SQLITE_STATUS_PAGECACHE_SIZE 0]
+  set val [format {now %10d  max %10d  max-size %10d} \
+              [lindex $x 1] [lindex $x 2] [lindex $y 2]]
+  output1 "Page-cache used:      $val"
+  set x [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0]
+  set val [format {now %10d  max %10d} [lindex $x 1] [lindex $x 2]]
+  output1 "Page-cache overflow:  $val"
+  set x [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0]
+  set val [format {now %10d  max %10d} [lindex $x 1] [lindex $x 2]]
+  output1 "Scratch memory used:  $val"
+  set x [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0]
+  set y [sqlite3_status SQLITE_STATUS_SCRATCH_SIZE 0]
+  set val [format {now %10d  max %10d  max-size %10d} \
+               [lindex $x 1] [lindex $x 2] [lindex $y 2]]
+  output1 "Scratch overflow:     $val"
+  ifcapable yytrackmaxstackdepth {
+    set x [sqlite3_status SQLITE_STATUS_PARSER_STACK 0]
+    set val [format {               max %10d} [lindex $x 2]]
+    output2 "Parser stack depth:    $val"
+  }
+}
+
+# A procedure to execute SQL
+#
+proc execsql {sql {db db}} {
+  # puts "SQL = $sql"
+  uplevel [list $db eval $sql]
+}
+proc execsql_timed {sql {db db}} {
+  set tm [time {
+    set x [uplevel [list $db eval $sql]]
+  } 1]
+  set tm [lindex $tm 0]
+  output1 -nonewline " ([expr {$tm*0.001}]ms) "
+  set x
+}
+
+# Execute SQL and catch exceptions.
+#
+proc catchsql {sql {db db}} {
+  # puts "SQL = $sql"
+  set r [catch [list uplevel [list $db eval $sql]] msg]
+  lappend r $msg
+  return $r
+}
+
+# Do an VDBE code dump on the SQL given
+#
+proc explain {sql {db db}} {
+  output2 ""
+  output2 "addr  opcode        p1      p2      p3      p4               p5  #"
+  output2 "----  ------------  ------  ------  ------  ---------------  --  -"
+  $db eval "explain $sql" {} {
+    output2 [format {%-4d  %-12.12s  %-6d  %-6d  %-6d  % -17s %s  %s} \
+      $addr $opcode $p1 $p2 $p3 $p4 $p5 $comment
+    ]
+  }
+}
+
+proc explain_i {sql {db db}} {
+  output2 ""
+  output2 "addr  opcode        p1      p2      p3      p4                p5  #"
+  output2 "----  ------------  ------  ------  ------  ----------------  --  -"
+
+
+  # Set up colors for the different opcodes. Scheme is as follows:
+  #
+  #   Red:   Opcodes that write to a b-tree.
+  #   Blue:  Opcodes that reposition or seek a cursor. 
+  #   Green: The ResultRow opcode.
+  #
+  if { [catch {fconfigure stdout -mode}]==0 } {
+    set R "\033\[31;1m"        ;# Red fg
+    set G "\033\[32;1m"        ;# Green fg
+    set B "\033\[34;1m"        ;# Red fg
+    set D "\033\[39;0m"        ;# Default fg
+  } else {
+    set R ""
+    set G ""
+    set B ""
+    set D ""
+  }
+  foreach opcode {
+      Seek SeekGE SeekGT SeekLE SeekLT NotFound Last Rewind
+      NoConflict Next Prev VNext VPrev VFilter
+      SorterSort SorterNext NextIfOpen
+  } {
+    set color($opcode) $B
+  }
+  foreach opcode {ResultRow} {
+    set color($opcode) $G
+  }
+  foreach opcode {IdxInsert Insert Delete IdxDelete} {
+    set color($opcode) $R
+  }
+
+  set bSeenGoto 0
+  $db eval "explain $sql" {} {
+    set x($addr) 0
+    set op($addr) $opcode
+
+    if {$opcode == "Goto" && ($bSeenGoto==0 || ($p2 > $addr+10))} {
+      set linebreak($p2) 1
+      set bSeenGoto 1
+    }
+
+    if {$opcode=="Once"} {
+      for {set i $addr} {$i<$p2} {incr i} {
+        set star($i) $addr
+      }
+    }
+
+    if {$opcode=="Next"  || $opcode=="Prev" 
+     || $opcode=="VNext" || $opcode=="VPrev"
+     || $opcode=="SorterNext" || $opcode=="NextIfOpen"
+    } {
+      for {set i $p2} {$i<$addr} {incr i} {
+        incr x($i) 2
+      }
+    }
+
+    if {$opcode == "Goto" && $p2<$addr && $op($p2)=="Yield"} {
+      for {set i [expr $p2+1]} {$i<$addr} {incr i} {
+        incr x($i) 2
+      }
+    }
+
+    if {$opcode == "Halt" && $comment == "End of coroutine"} {
+      set linebreak([expr $addr+1]) 1
+    }
+  }
+
+  $db eval "explain $sql" {} {
+    if {[info exists linebreak($addr)]} {
+      output2 ""
+    }
+    set I [string repeat " " $x($addr)]
+
+    if {[info exists star($addr)]} {
+      set ii [expr $x($star($addr))]
+      append I "  "
+      set I [string replace $I $ii $ii *]
+    }
+
+    set col ""
+    catch { set col $color($opcode) }
+
+    output2 [format {%-4d  %s%s%-12.12s%s  %-6d  %-6d  %-6d  % -17s %s  %s} \
+      $addr $I $col $opcode $D $p1 $p2 $p3 $p4 $p5 $comment
+    ]
+  }
+  output2 "----  ------------  ------  ------  ------  ----------------  --  -"
+}
+
+# Show the VDBE program for an SQL statement but omit the Trace
+# opcode at the beginning.  This procedure can be used to prove
+# that different SQL statements generate exactly the same VDBE code.
+#
+proc explain_no_trace {sql} {
+  set tr [db eval "EXPLAIN $sql"]
+  return [lrange $tr 7 end]
+}
+
+# Another procedure to execute SQL.  This one includes the field
+# names in the returned list.
+#
+proc execsql2 {sql} {
+  set result {}
+  db eval $sql data {
+    foreach f $data(*) {
+      lappend result $f $data($f)
+    }
+  }
+  return $result
+}
+
+# Use a temporary in-memory database to execute SQL statements
+#
+proc memdbsql {sql} {
+  sqlite3 memdb :memory:
+  set result [memdb eval $sql]
+  memdb close
+  return $result
+}
+
+# Use the non-callback API to execute multiple SQL statements
+#
+proc stepsql {dbptr sql} {
+  set sql [string trim $sql]
+  set r 0
+  while {[string length $sql]>0} {
+    if {[catch {sqlite3_prepare $dbptr $sql -1 sqltail} vm]} {
+      return [list 1 $vm]
+    }
+    set sql [string trim $sqltail]
+#    while {[sqlite_step $vm N VAL COL]=="SQLITE_ROW"} {
+#      foreach v $VAL {lappend r $v}
+#    }
+    while {[sqlite3_step $vm]=="SQLITE_ROW"} {
+      for {set i 0} {$i<[sqlite3_data_count $vm]} {incr i} {
+        lappend r [sqlite3_column_text $vm $i]
+      }
+    }
+    if {[catch {sqlite3_finalize $vm} errmsg]} {
+      return [list 1 $errmsg]
+    }
+  }
+  return $r
+}
+
+# Do an integrity check of the entire database
+#
+proc integrity_check {name {db db}} {
+  ifcapable integrityck {
+    do_test $name [list execsql {PRAGMA integrity_check} $db] {ok}
+  }
+}
+
+# Check the extended error code
+#
+proc verify_ex_errcode {name expected {db db}} {
+  do_test $name [list sqlite3_extended_errcode $db] $expected
+}
+
+
+# Return true if the SQL statement passed as the second argument uses a
+# statement transaction.
+#
+proc sql_uses_stmt {db sql} {
+  set stmt [sqlite3_prepare $db $sql -1 dummy]
+  set uses [uses_stmt_journal $stmt]
+  sqlite3_finalize $stmt
+  return $uses
+}
+
+proc fix_ifcapable_expr {expr} {
+  set ret ""
+  set state 0
+  for {set i 0} {$i < [string length $expr]} {incr i} {
+    set char [string range $expr $i $i]
+    set newstate [expr {[string is alnum $char] || $char eq "_"}]
+    if {$newstate && !$state} {
+      append ret {$::sqlite_options(}
+    }
+    if {!$newstate && $state} {
+      append ret )
+    }
+    append ret $char
+    set state $newstate
+  }
+  if {$state} {append ret )}
+  return $ret
+}
+
+# Returns non-zero if the capabilities are present; zero otherwise.
+#
+proc capable {expr} {
+  set e [fix_ifcapable_expr $expr]; return [expr ($e)]
+}
+
+# Evaluate a boolean expression of capabilities.  If true, execute the
+# code.  Omit the code if false.
+#
+proc ifcapable {expr code {else ""} {elsecode ""}} {
+  #regsub -all {[a-z_0-9]+} $expr {$::sqlite_options(&)} e2
+  set e2 [fix_ifcapable_expr $expr]
+  if ($e2) {
+    set c [catch {uplevel 1 $code} r]
+  } else {
+    set c [catch {uplevel 1 $elsecode} r]
+  }
+  return -code $c $r
+}
+
+# This proc execs a seperate process that crashes midway through executing
+# the SQL script $sql on database test.db.
+#
+# The crash occurs during a sync() of file $crashfile. When the crash
+# occurs a random subset of all unsynced writes made by the process are
+# written into the files on disk. Argument $crashdelay indicates the
+# number of file syncs to wait before crashing.
+#
+# The return value is a list of two elements. The first element is a
+# boolean, indicating whether or not the process actually crashed or
+# reported some other error. The second element in the returned list is the
+# error message. This is "child process exited abnormally" if the crash
+# occurred.
+#
+#   crashsql -delay CRASHDELAY -file CRASHFILE ?-blocksize BLOCKSIZE? $sql
+#
+proc crashsql {args} {
+
+  set blocksize ""
+  set crashdelay 1
+  set prngseed 0
+  set opendb { sqlite3 db test.db -vfs crash }
+  set tclbody {}
+  set crashfile ""
+  set dc ""
+  set sql [lindex $args end]
+
+  for {set ii 0} {$ii < [llength $args]-1} {incr ii 2} {
+    set z [lindex $args $ii]
+    set n [string length $z]
+    set z2 [lindex $args [expr $ii+1]]
+
+    if     {$n>1 && [string first $z -delay]==0}     {set crashdelay $z2} \
+    elseif {$n>1 && [string first $z -opendb]==0}    {set opendb $z2} \
+    elseif {$n>1 && [string first $z -seed]==0}      {set prngseed $z2} \
+    elseif {$n>1 && [string first $z -file]==0}      {set crashfile $z2}  \
+    elseif {$n>1 && [string first $z -tclbody]==0}   {set tclbody $z2}  \
+    elseif {$n>1 && [string first $z -blocksize]==0} {set blocksize "-s $z2" } \
+    elseif {$n>1 && [string first $z -characteristics]==0} {set dc "-c {$z2}" } \
+    else   { error "Unrecognized option: $z" }
+  }
+
+  if {$crashfile eq ""} {
+    error "Compulsory option -file missing"
+  }
+
+  # $crashfile gets compared to the native filename in
+  # cfSync(), which can be different then what TCL uses by
+  # default, so here we force it to the "nativename" format.
+  set cfile [string map {\\ \\\\} [file nativename [file join [get_pwd] $crashfile]]]
+
+  set f [open crash.tcl w]
+  puts $f "sqlite3_crash_enable 1"
+  puts $f "sqlite3_crashparams $blocksize $dc $crashdelay $cfile"
+  puts $f "sqlite3_test_control_pending_byte $::sqlite_pending_byte"
+
+  # This block sets the cache size of the main database to 10
+  # pages. This is done in case the build is configured to omit
+  # "PRAGMA cache_size".
+  if {$opendb!=""} {
+    puts $f $opendb 
+    puts $f {db eval {SELECT * FROM sqlite_master;}}
+    puts $f {set bt [btree_from_db db]}
+    puts $f {btree_set_cache_size $bt 10}
+  }
+
+  if {$prngseed} {
+    set seed [expr {$prngseed%10007+1}]
+    # puts seed=$seed
+    puts $f "db eval {SELECT randomblob($seed)}"
+  }
+
+  if {[string length $tclbody]>0} {
+    puts $f $tclbody
+  }
+  if {[string length $sql]>0} {
+    puts $f "db eval {"
+    puts $f   "$sql"
+    puts $f "}"
+  }
+  close $f
+  set r [catch {
+    exec [info nameofexec] crash.tcl >@stdout
+  } msg]
+
+  # Windows/ActiveState TCL returns a slightly different
+  # error message.  We map that to the expected message
+  # so that we don't have to change all of the test
+  # cases.
+  if {$::tcl_platform(platform)=="windows"} {
+    if {$msg=="child killed: unknown signal"} {
+      set msg "child process exited abnormally"
+    }
+  }
+
+  lappend r $msg
+}
+
+proc run_ioerr_prep {} {
+  set ::sqlite_io_error_pending 0
+  catch {db close}
+  catch {db2 close}
+  catch {forcedelete test.db}
+  catch {forcedelete test.db-journal}
+  catch {forcedelete test2.db}
+  catch {forcedelete test2.db-journal}
+  set ::DB [sqlite3 db test.db; sqlite3_connection_pointer db]
+  sqlite3_extended_result_codes $::DB $::ioerropts(-erc)
+  if {[info exists ::ioerropts(-tclprep)]} {
+    eval $::ioerropts(-tclprep)
+  }
+  if {[info exists ::ioerropts(-sqlprep)]} {
+    execsql $::ioerropts(-sqlprep)
+  }
+  expr 0
+}
+
+# Usage: do_ioerr_test <test number> <options...>
+#
+# This proc is used to implement test cases that check that IO errors
+# are correctly handled. The first argument, <test number>, is an integer
+# used to name the tests executed by this proc. Options are as follows:
+#
+#     -tclprep          TCL script to run to prepare test.
+#     -sqlprep          SQL script to run to prepare test.
+#     -tclbody          TCL script to run with IO error simulation.
+#     -sqlbody          TCL script to run with IO error simulation.
+#     -exclude          List of 'N' values not to test.
+#     -erc              Use extended result codes
+#     -persist          Make simulated I/O errors persistent
+#     -start            Value of 'N' to begin with (default 1)
+#
+#     -cksum            Boolean. If true, test that the database does
+#                       not change during the execution of the test case.
+#
+proc do_ioerr_test {testname args} {
+
+  set ::ioerropts(-start) 1
+  set ::ioerropts(-cksum) 0
+  set ::ioerropts(-erc) 0
+  set ::ioerropts(-count) 100000000
+  set ::ioerropts(-persist) 1
+  set ::ioerropts(-ckrefcount) 0
+  set ::ioerropts(-restoreprng) 1
+  array set ::ioerropts $args
+
+  # TEMPORARY: For 3.5.9, disable testing of extended result codes. There are
+  # a couple of obscure IO errors that do not return them.
+  set ::ioerropts(-erc) 0
+
+  # Create a single TCL script from the TCL and SQL specified
+  # as the body of the test.
+  set ::ioerrorbody {}
+  if {[info exists ::ioerropts(-tclbody)]} {
+    append ::ioerrorbody "$::ioerropts(-tclbody)\n"
+  }
+  if {[info exists ::ioerropts(-sqlbody)]} {
+    append ::ioerrorbody "db eval {$::ioerropts(-sqlbody)}"
+  }
+
+  save_prng_state
+  if {$::ioerropts(-cksum)} {
+    run_ioerr_prep
+    eval $::ioerrorbody
+    set ::goodcksum [cksum]
+  }
+
+  set ::go 1
+  #reset_prng_state
+  for {set n $::ioerropts(-start)} {$::go} {incr n} {
+    set ::TN $n
+    incr ::ioerropts(-count) -1
+    if {$::ioerropts(-count)<0} break
+
+    # Skip this IO error if it was specified with the "-exclude" option.
+    if {[info exists ::ioerropts(-exclude)]} {
+      if {[lsearch $::ioerropts(-exclude) $n]!=-1} continue
+    }
+    if {$::ioerropts(-restoreprng)} {
+      restore_prng_state
+    }
+
+    # Delete the files test.db and test2.db, then execute the TCL and
+    # SQL (in that order) to prepare for the test case.
+    do_test $testname.$n.1 {
+      run_ioerr_prep
+    } {0}
+
+    # Read the 'checksum' of the database.
+    if {$::ioerropts(-cksum)} {
+      set ::checksum [cksum]
+    }
+
+    # Set the Nth IO error to fail.
+    do_test $testname.$n.2 [subst {
+      set ::sqlite_io_error_persist $::ioerropts(-persist)
+      set ::sqlite_io_error_pending $n
+    }] $n
+
+    # Execute the TCL script created for the body of this test. If
+    # at least N IO operations performed by SQLite as a result of
+    # the script, the Nth will fail.
+    do_test $testname.$n.3 {
+      set ::sqlite_io_error_hit 0
+      set ::sqlite_io_error_hardhit 0
+      set r [catch $::ioerrorbody msg]
+      set ::errseen $r
+      set rc [sqlite3_errcode $::DB]
+      if {$::ioerropts(-erc)} {
+        # If we are in extended result code mode, make sure all of the
+        # IOERRs we get back really do have their extended code values.
+        # If an extended result code is returned, the sqlite3_errcode
+        # TCLcommand will return a string of the form:  SQLITE_IOERR+nnnn
+        # where nnnn is a number
+        if {[regexp {^SQLITE_IOERR} $rc] && ![regexp {IOERR\+\d} $rc]} {
+          return $rc
+        }
+      } else {
+        # If we are not in extended result code mode, make sure no
+        # extended error codes are returned.
+        if {[regexp {\+\d} $rc]} {
+          return $rc
+        }
+      }
+      # The test repeats as long as $::go is non-zero.  $::go starts out
+      # as 1.  When a test runs to completion without hitting an I/O
+      # error, that means there is no point in continuing with this test
+      # case so set $::go to zero.
+      #
+      if {$::sqlite_io_error_pending>0} {
+        set ::go 0
+        set q 0
+        set ::sqlite_io_error_pending 0
+      } else {
+        set q 1
+      }
+
+      set s [expr $::sqlite_io_error_hit==0]
+      if {$::sqlite_io_error_hit>$::sqlite_io_error_hardhit && $r==0} {
+        set r 1
+      }
+      set ::sqlite_io_error_hit 0
+
+      # One of two things must have happened. either
+      #   1.  We never hit the IO error and the SQL returned OK
+      #   2.  An IO error was hit and the SQL failed
+      #
+      #puts "s=$s r=$r q=$q"
+      expr { ($s && !$r && !$q) || (!$s && $r && $q) }
+    } {1}
+
+    set ::sqlite_io_error_hit 0
+    set ::sqlite_io_error_pending 0
+
+    # Check that no page references were leaked. There should be
+    # a single reference if there is still an active transaction,
+    # or zero otherwise.
+    #
+    # UPDATE: If the IO error occurs after a 'BEGIN' but before any
+    # locks are established on database files (i.e. if the error
+    # occurs while attempting to detect a hot-journal file), then
+    # there may 0 page references and an active transaction according
+    # to [sqlite3_get_autocommit].
+    #
+    if {$::go && $::sqlite_io_error_hardhit && $::ioerropts(-ckrefcount)} {
+      do_test $testname.$n.4 {
+        set bt [btree_from_db db]
+        db_enter db
+        array set stats [btree_pager_stats $bt]
+        db_leave db
+        set nRef $stats(ref)
+        expr {$nRef == 0 || ([sqlite3_get_autocommit db]==0 && $nRef == 1)}
+      } {1}
+    }
+
+    # If there is an open database handle and no open transaction,
+    # and the pager is not running in exclusive-locking mode,
+    # check that the pager is in "unlocked" state. Theoretically,
+    # if a call to xUnlock() failed due to an IO error the underlying
+    # file may still be locked.
+    #
+    ifcapable pragma {
+      if { [info commands db] ne ""
+        && $::ioerropts(-ckrefcount)
+        && [db one {pragma locking_mode}] eq "normal"
+        && [sqlite3_get_autocommit db]
+      } {
+        do_test $testname.$n.5 {
+          set bt [btree_from_db db]
+          db_enter db
+          array set stats [btree_pager_stats $bt]
+          db_leave db
+          set stats(state)
+        } 0
+      }
+    }
+
+    # If an IO error occurred, then the checksum of the database should
+    # be the same as before the script that caused the IO error was run.
+    #
+    if {$::go && $::sqlite_io_error_hardhit && $::ioerropts(-cksum)} {
+      do_test $testname.$n.6 {
+        catch {db close}
+        catch {db2 close}
+        set ::DB [sqlite3 db test.db; sqlite3_connection_pointer db]
+        set nowcksum [cksum]
+        set res [expr {$nowcksum==$::checksum || $nowcksum==$::goodcksum}]
+        if {$res==0} {
+          output2 "now=$nowcksum"
+          output2 "the=$::checksum"
+          output2 "fwd=$::goodcksum"
+        }
+        set res
+      } 1
+    }
+
+    set ::sqlite_io_error_hardhit 0
+    set ::sqlite_io_error_pending 0
+    if {[info exists ::ioerropts(-cleanup)]} {
+      catch $::ioerropts(-cleanup)
+    }
+  }
+  set ::sqlite_io_error_pending 0
+  set ::sqlite_io_error_persist 0
+  unset ::ioerropts
+}
+
+# Return a checksum based on the contents of the main database associated
+# with connection $db
+#
+proc cksum {{db db}} {
+  set txt [$db eval {
+      SELECT name, type, sql FROM sqlite_master order by name
+  }]\n
+  foreach tbl [$db eval {
+      SELECT name FROM sqlite_master WHERE type='table' order by name
+  }] {
+    append txt [$db eval "SELECT * FROM $tbl"]\n
+  }
+  foreach prag {default_synchronous default_cache_size} {
+    append txt $prag-[$db eval "PRAGMA $prag"]\n
+  }
+  set cksum [string length $txt]-[md5 $txt]
+  # puts $cksum-[file size test.db]
+  return $cksum
+}
+
+# Generate a checksum based on the contents of the main and temp tables
+# database $db. If the checksum of two databases is the same, and the
+# integrity-check passes for both, the two databases are identical.
+#
+proc allcksum {{db db}} {
+  set ret [list]
+  ifcapable tempdb {
+    set sql {
+      SELECT name FROM sqlite_master WHERE type = 'table' UNION
+      SELECT name FROM sqlite_temp_master WHERE type = 'table' UNION
+      SELECT 'sqlite_master' UNION
+      SELECT 'sqlite_temp_master' ORDER BY 1
+    }
+  } else {
+    set sql {
+      SELECT name FROM sqlite_master WHERE type = 'table' UNION
+      SELECT 'sqlite_master' ORDER BY 1
+    }
+  }
+  set tbllist [$db eval $sql]
+  set txt {}
+  foreach tbl $tbllist {
+    append txt [$db eval "SELECT * FROM $tbl"]
+  }
+  foreach prag {default_cache_size} {
+    append txt $prag-[$db eval "PRAGMA $prag"]\n
+  }
+  # puts txt=$txt
+  return [md5 $txt]
+}
+
+# Generate a checksum based on the contents of a single database with
+# a database connection.  The name of the database is $dbname.
+# Examples of $dbname are "temp" or "main".
+#
+proc dbcksum {db dbname} {
+  if {$dbname=="temp"} {
+    set master sqlite_temp_master
+  } else {
+    set master $dbname.sqlite_master
+  }
+  set alltab [$db eval "SELECT name FROM $master WHERE type='table'"]
+  set txt [$db eval "SELECT * FROM $master"]\n
+  foreach tab $alltab {
+    append txt [$db eval "SELECT * FROM $dbname.$tab"]\n
+  }
+  return [md5 $txt]
+}
+
+proc memdebug_log_sql {{filename mallocs.sql}} {
+
+  set data [sqlite3_memdebug_log dump]
+  set nFrame [expr [llength [lindex $data 0]]-2]
+  if {$nFrame < 0} { return "" }
+
+  set database temp
+
+  set tbl "CREATE TABLE ${database}.malloc(zTest, nCall, nByte, lStack);"
+
+  set sql ""
+  foreach e $data {
+    set nCall [lindex $e 0]
+    set nByte [lindex $e 1]
+    set lStack [lrange $e 2 end]
+    append sql "INSERT INTO ${database}.malloc VALUES"
+    append sql "('test', $nCall, $nByte, '$lStack');\n"
+    foreach f $lStack {
+      set frames($f) 1
+    }
+  }
+
+  set tbl2 "CREATE TABLE ${database}.frame(frame INTEGER PRIMARY KEY, line);\n"
+  set tbl3 "CREATE TABLE ${database}.file(name PRIMARY KEY, content);\n"
+
+  foreach f [array names frames] {
+    set addr [format %x $f]
+    set cmd "addr2line -e [info nameofexec] $addr"
+    set line [eval exec $cmd]
+    append sql "INSERT INTO ${database}.frame VALUES($f, '$line');\n"
+
+    set file [lindex [split $line :] 0]
+    set files($file) 1
+  }
+
+  foreach f [array names files] {
+    set contents ""
+    catch {
+      set fd [open $f]
+      set contents [read $fd]
+      close $fd
+    }
+    set contents [string map {' ''} $contents]
+    append sql "INSERT INTO ${database}.file VALUES('$f', '$contents');\n"
+  }
+
+  set fd [open $filename w]
+  puts $fd "BEGIN; ${tbl}${tbl2}${tbl3}${sql} ; COMMIT;"
+  close $fd
+}
+
+# Drop all tables in database [db]
+proc drop_all_tables {{db db}} {
+  ifcapable trigger&&foreignkey {
+    set pk [$db one "PRAGMA foreign_keys"]
+    $db eval "PRAGMA foreign_keys = OFF"
+  }
+  foreach {idx name file} [db eval {PRAGMA database_list}] {
+    if {$idx==1} {
+      set master sqlite_temp_master
+    } else {
+      set master $name.sqlite_master
+    }
+    foreach {t type} [$db eval "
+      SELECT name, type FROM $master
+      WHERE type IN('table', 'view') AND name NOT LIKE 'sqliteX_%' ESCAPE 'X'
+    "] {
+      $db eval "DROP $type \"$t\""
+    }
+  }
+  ifcapable trigger&&foreignkey {
+    $db eval "PRAGMA foreign_keys = $pk"
+  }
+}
+
+# Drop all auxiliary indexes from the main database opened by handle [db].
+#
+proc drop_all_indexes {{db db}} {
+  set L [$db eval {
+    SELECT name FROM sqlite_master WHERE type='index' AND sql LIKE 'create%'
+  }]
+  foreach idx $L { $db eval "DROP INDEX $idx" }
+}
+
+
+#-------------------------------------------------------------------------
+# If a test script is executed with global variable $::G(perm:name) set to
+# "wal", then the tests are run in WAL mode. Otherwise, they should be run
+# in rollback mode. The following Tcl procs are used to make this less
+# intrusive:
+#
+#   wal_set_journal_mode ?DB?
+#
+#     If running a WAL test, execute "PRAGMA journal_mode = wal" using
+#     connection handle DB. Otherwise, this command is a no-op.
+#
+#   wal_check_journal_mode TESTNAME ?DB?
+#
+#     If running a WAL test, execute a tests case that fails if the main
+#     database for connection handle DB is not currently a WAL database.
+#     Otherwise (if not running a WAL permutation) this is a no-op.
+#
+#   wal_is_wal_mode
+#
+#     Returns true if this test should be run in WAL mode. False otherwise.
+#
+proc wal_is_wal_mode {} {
+  expr {[permutation] eq "wal"}
+}
+proc wal_set_journal_mode {{db db}} {
+  if { [wal_is_wal_mode] } {
+    $db eval "PRAGMA journal_mode = WAL"
+  }
+}
+proc wal_check_journal_mode {testname {db db}} {
+  if { [wal_is_wal_mode] } {
+    $db eval { SELECT * FROM sqlite_master }
+    do_test $testname [list $db eval "PRAGMA main.journal_mode"] {wal}
+  }
+}
+
+proc wal_is_capable {} {
+  ifcapable !wal { return 0 }
+  if {[permutation]=="journaltest"} { return 0 }
+  return 1
+}
+
+proc permutation {} {
+  set perm ""
+  catch {set perm $::G(perm:name)}
+  set perm
+}
+proc presql {} {
+  set presql ""
+  catch {set presql $::G(perm:presql)}
+  set presql
+}
+
+proc isquick {} {
+  set ret 0
+  catch {set ret $::G(isquick)}
+  set ret
+}
+
+#-------------------------------------------------------------------------
+#
+proc slave_test_script {script} {
+
+  # Create the interpreter used to run the test script.
+  interp create tinterp
+
+  # Populate some global variables that tester.tcl expects to see.
+  foreach {var value} [list              \
+    ::argv0 $::argv0                     \
+    ::argv  {}                           \
+    ::SLAVE 1                            \
+  ] {
+    interp eval tinterp [list set $var $value]
+  }
+
+  # If output is being copied into a file, share the file-descriptor with
+  # the interpreter.
+  if {[info exists ::G(output_fd)]} {
+    interp share {} $::G(output_fd) tinterp
+  }
+
+  # The alias used to access the global test counters.
+  tinterp alias set_test_counter set_test_counter
+
+  # Set up the ::cmdlinearg array in the slave.
+  interp eval tinterp [list array set ::cmdlinearg [array get ::cmdlinearg]]
+
+  # Set up the ::G array in the slave.
+  interp eval tinterp [list array set ::G [array get ::G]]
+
+  # Load the various test interfaces implemented in C.
+  load_testfixture_extensions tinterp
+
+  # Run the test script.
+  interp eval tinterp $script
+
+  # Check if the interpreter call [run_thread_tests]
+  if { [interp eval tinterp {info exists ::run_thread_tests_called}] } {
+    set ::run_thread_tests_called 1
+  }
+
+  # Delete the interpreter used to run the test script.
+  interp delete tinterp
+}
+
+proc slave_test_file {zFile} {
+  set tail [file tail $zFile]
+
+  if {[info exists ::G(start:permutation)]} {
+    if {[permutation] != $::G(start:permutation)} return
+    unset ::G(start:permutation)
+  }
+  if {[info exists ::G(start:file)]} {
+    if {$tail != $::G(start:file) && $tail!="$::G(start:file).test"} return
+    unset ::G(start:file)
+  }
+
+  # Remember the value of the shared-cache setting. So that it is possible
+  # to check afterwards that it was not modified by the test script.
+  #
+  ifcapable shared_cache { set scs [sqlite3_enable_shared_cache] }
+
+  # Run the test script in a slave interpreter.
+  #
+  unset -nocomplain ::run_thread_tests_called
+  reset_prng_state
+  set ::sqlite_open_file_count 0
+  set time [time { slave_test_script [list source $zFile] }]
+  set ms [expr [lindex $time 0] / 1000]
+
+  # Test that all files opened by the test script were closed. Omit this
+  # if the test script has "thread" in its name. The open file counter
+  # is not thread-safe.
+  #
+  if {[info exists ::run_thread_tests_called]==0} {
+    do_test ${tail}-closeallfiles { expr {$::sqlite_open_file_count>0} } {0}
+  }
+  set ::sqlite_open_file_count 0
+
+  # Test that the global "shared-cache" setting was not altered by
+  # the test script.
+  #
+  ifcapable shared_cache {
+    set res [expr {[sqlite3_enable_shared_cache] == $scs}]
+    do_test ${tail}-sharedcachesetting [list set {} $res] 1
+  }
+
+  # Add some info to the output.
+  #
+  output2 "Time: $tail $ms ms"
+  show_memstats
+}
+
+# Open a new connection on database test.db and execute the SQL script
+# supplied as an argument. Before returning, close the new conection and
+# restore the 4 byte fields starting at header offsets 28, 92 and 96
+# to the values they held before the SQL was executed. This simulates
+# a write by a pre-3.7.0 client.
+#
+proc sql36231 {sql} {
+  set B [hexio_read test.db 92 8]
+  set A [hexio_read test.db 28 4]
+  sqlite3 db36231 test.db
+  catch { db36231 func a_string a_string }
+  execsql $sql db36231
+  db36231 close
+  hexio_write test.db 28 $A
+  hexio_write test.db 92 $B
+  return ""
+}
+
+proc db_save {} {
+  foreach f [glob -nocomplain sv_test.db*] { forcedelete $f }
+  foreach f [glob -nocomplain test.db*] {
+    set f2 "sv_$f"
+    forcecopy $f $f2
+  }
+}
+proc db_save_and_close {} {
+  db_save
+  catch { db close }
+  return ""
+}
+proc db_restore {} {
+  foreach f [glob -nocomplain test.db*] { forcedelete $f }
+  foreach f2 [glob -nocomplain sv_test.db*] {
+    set f [string range $f2 3 end]
+    forcecopy $f2 $f
+  }
+}
+proc db_restore_and_reopen {{dbfile test.db}} {
+  catch { db close }
+  db_restore
+  sqlite3 db $dbfile
+}
+proc db_delete_and_reopen {{file test.db}} {
+  catch { db close }
+  foreach f [glob -nocomplain test.db*] { forcedelete $f }
+  sqlite3 db $file
+}
+
+# Close any connections named [db], [db2] or [db3]. Then use sqlite3_config
+# to configure the size of the PAGECACHE allocation using the parameters
+# provided to this command. Save the old PAGECACHE parameters in a global 
+# variable so that [test_restore_config_pagecache] can restore the previous
+# configuration.
+#
+# Before returning, reopen connection [db] on file test.db.
+#
+proc test_set_config_pagecache {sz nPg} {
+  catch {db close}
+  catch {db2 close}
+  catch {db3 close}
+
+  sqlite3_shutdown
+  set ::old_pagecache_config [sqlite3_config_pagecache $sz $nPg]
+  sqlite3_initialize
+  autoinstall_test_functions
+  reset_db
+}
+
+# Close any connections named [db], [db2] or [db3]. Then use sqlite3_config
+# to configure the size of the PAGECACHE allocation to the size saved in
+# the global variable by an earlier call to [test_set_config_pagecache].
+#
+# Before returning, reopen connection [db] on file test.db.
+#
+proc test_restore_config_pagecache {} {
+  catch {db close}
+  catch {db2 close}
+  catch {db3 close}
+
+  sqlite3_shutdown
+  eval sqlite3_config_pagecache $::old_pagecache_config
+  unset ::old_pagecache_config 
+  sqlite3_initialize
+  autoinstall_test_functions
+  sqlite3 db test.db
+}
+
+proc test_find_binary {nm} {
+  if {$::tcl_platform(platform)=="windows"} {
+    set ret "$nm.exe"
+  } else {
+    set ret $nm
+  }
+  set ret [file normalize [file join $::cmdlinearg(TESTFIXTURE_HOME) $ret]]
+  if {![file executable $ret]} {
+    finish_test
+    return ""
+  }
+  return $ret
+}
+
+# Find the name of the 'shell' executable (e.g. "sqlite3.exe") to use for
+# the tests in shell[1-5].test. If no such executable can be found, invoke
+# [finish_test ; return] in the callers context.
+#
+proc test_find_cli {} {
+  set prog [test_find_binary sqlite3]
+  if {$prog==""} { return -code return }
+  return $prog
+}
+
+# Find the name of the 'sqldiff' executable (e.g. "sqlite3.exe") to use for
+# the tests in sqldiff tests. If no such executable can be found, invoke
+# [finish_test ; return] in the callers context.
+#
+proc test_find_sqldiff {} {
+  set prog [test_find_binary sqldiff]
+  if {$prog==""} { return -code return }
+  return $prog
+}
+
+
+# If the library is compiled with the SQLITE_DEFAULT_AUTOVACUUM macro set
+# to non-zero, then set the global variable $AUTOVACUUM to 1.
+set AUTOVACUUM $sqlite_options(default_autovacuum)
+
+# Make sure the FTS enhanced query syntax is disabled.
+set sqlite_fts3_enable_parentheses 0
+
+# During testing, assume that all database files are well-formed.  The
+# few test cases that deliberately corrupt database files should rescind 
+# this setting by invoking "database_can_be_corrupt"
+#
+database_never_corrupt
+
+source $testdir/thread_common.tcl
+source $testdir/malloc_common.tcl