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|
# 2007 May 1
#
# 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: incrblob_err.test,v 1.3 2007/05/17 16:38:30 danielk1977 Exp $
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable {!incrblob} {
finish_test
return
}
# Only run these tests if memory debugging is turned on.
#
if {[info command sqlite_malloc_stat]==""} {
puts "Skipping incrblob_err tests: not compiled with -DSQLITE_MEMDEBUG..."
finish_test
return
}
# Usage: do_malloc_test <test number> <options...>
#
# 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 malloc failure simulation.
# -sqlbody TCL script to run with malloc failure simulation.
# -cleanup TCL script to run after the test.
#
# This command runs a series of tests to verify SQLite's ability
# to handle an out-of-memory condition gracefully. It is assumed
# that if this condition occurs a malloc() call will return a
# NULL pointer. Linux, for example, doesn't do that by default. See
# the "BUGS" section of malloc(3).
#
# Each iteration of a loop, the TCL commands in any argument passed
# to the -tclbody switch, followed by the SQL commands in any argument
# passed to the -sqlbody switch are executed. Each iteration the
# Nth call to sqliteMalloc() is made to fail, where N is increased
# each time the loop runs starting from 1. When all commands execute
# successfully, the loop ends.
#
proc do_malloc_test {tn args} {
array unset ::mallocopts
array set ::mallocopts $args
set ::go 1
for {set ::n 1} {$::go && $::n < 50000} {incr ::n} {
do_test incrblob_err-$tn.$::n {
# Remove all traces of database files test.db and test2.db from the files
# system. Then open (empty database) "test.db" with the handle [db].
#
sqlite_malloc_fail 0
catch {db close}
catch {file delete -force test.db}
catch {file delete -force test.db-journal}
catch {file delete -force test2.db}
catch {file delete -force test2.db-journal}
catch {sqlite3 db test.db}
set ::DB [sqlite3_connection_pointer db]
# Execute any -tclprep and -sqlprep scripts.
#
if {[info exists ::mallocopts(-tclprep)]} {
eval $::mallocopts(-tclprep)
}
if {[info exists ::mallocopts(-sqlprep)]} {
execsql $::mallocopts(-sqlprep)
}
# Now set the ${::n}th malloc() to fail and execute the -tclbody and
# -sqlbody scripts.
#
sqlite_malloc_fail $::n
set ::mallocbody {}
if {[info exists ::mallocopts(-tclbody)]} {
append ::mallocbody "$::mallocopts(-tclbody)\n"
}
if {[info exists ::mallocopts(-sqlbody)]} {
append ::mallocbody "db eval {$::mallocopts(-sqlbody)}"
}
set v [catch $::mallocbody msg]
# If the test fails (if $v!=0) and the database connection actually
# exists, make sure the failure code is SQLITE_NOMEM.
if {$v && [info command db]=="db" && [info exists ::mallocopts(-sqlbody)]
&& [db errorcode]!=7} {
set v 999
}
set leftover [lindex [sqlite_malloc_stat] 2]
if {$leftover>0} {
if {$leftover>1} {puts "\nLeftover: $leftover\nReturn=$v Message=$msg"}
set ::go 0
if {$v} {
puts "\nError message returned: $msg"
} else {
set v {1 1}
}
} else {
set v2 [expr {$msg=="" || $msg=="out of memory"}]
if {!$v2} {puts "\nError message returned: $msg"}
lappend v $v2
}
} {1 1}
if {[info exists ::mallocopts(-cleanup)]} {
catch [list uplevel #0 $::mallocopts(-cleanup)] msg
}
}
unset ::mallocopts
}
set ::fd [open [info script]]
set ::data [read $::fd]
close $::fd
do_malloc_test 1 -tclprep {
set bytes [file size [info script]]
execsql {
CREATE TABLE blobs(k, v BLOB);
INSERT INTO blobs VALUES(1, zeroblob($::bytes));
}
} -tclbody {
set ::blob [db incrblob blobs v 1]
set rc [catch {puts -nonewline $::blob $::data}]
if {$rc} { error "out of memory" }
}
do_malloc_test 2 -tclprep {
execsql {
CREATE TABLE blobs(k, v BLOB);
INSERT INTO blobs VALUES(1, $::data);
}
} -tclbody {
set ::blob [db incrblob blobs v 1]
set rc [catch {set ::r [read $::blob]}]
if {$rc} {
error "out of memory"
} elseif {$::r ne $::data} {
error "Bad data read..."
}
}
do_malloc_test 3 -tclprep {
execsql {
CREATE TABLE blobs(k, v BLOB);
INSERT INTO blobs VALUES(1, $::data);
}
} -tclbody {
set ::blob [db incrblob blobs v 1]
set rc [catch {set ::r [read $::blob]}]
if {$rc} {
error "out of memory"
} elseif {$::r ne $::data} {
error "Bad data read..."
}
set rc [catch {close $::blob}]
if {$rc} {
error "out of memory"
}
}
sqlite_malloc_fail 0
do_ioerr_test incrblob_err-4 -cksum 1 -sqlprep {
CREATE TABLE blobs(k, v BLOB);
INSERT INTO blobs VALUES(1, $::data);
} -tclbody {
set ::blob [db incrblob blobs v 1]
read $::blob
}
do_ioerr_test incrblob_err-5 -cksum 1 -sqlprep {
CREATE TABLE blobs(k, v BLOB);
INSERT INTO blobs VALUES(1, zeroblob(length(CAST($::data AS BLOB))));
} -tclbody {
set ::blob [db incrblob blobs v 1]
puts -nonewline $::blob $::data
close $::blob
}
do_ioerr_test incrblob_err-6 -cksum 1 -sqlprep {
CREATE TABLE blobs(k, v BLOB);
INSERT INTO blobs VALUES(1, $::data || $::data || $::data);
} -tclbody {
set ::blob [db incrblob blobs v 1]
seek $::blob -20 end
puts -nonewline $::blob "12345678900987654321"
close $::blob
}
finish_test
|
