# 2013 March 20
#
# 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 tests the effect of the mmap() or mremap() system calls
# returning an error on the library.
#
# If either mmap() or mremap() fails, SQLite should log an error
# message, then continue accessing the database using read() and
# write() exclusively.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix mmap2
if {$::tcl_platform(platform)!="unix" || [test_syscall defaultvfs] != "unix"} {
finish_test
return
}
ifcapable !mmap {
finish_test
return
}
db close
sqlite3_shutdown
test_sqlite3_log xLog
proc xLog {error_code msg} {
if {[string match os_unix.c* $msg]} {
lappend ::log $msg
}
}
foreach syscall {mmap mremap} {
test_syscall uninstall
if {[catch {test_syscall install $syscall}]} continue
for {set i 1} {$i < 20} {incr i} {
reset_db
execsql { PRAGMA mmap_size = 8000000 }
test_syscall fault $i 1
test_syscall errno $syscall ENOMEM
set ::log ""
do_execsql_test 1.$syscall.$i.1 {
CREATE TABLE t1(a, b, UNIQUE(a, b));
INSERT INTO t1 VALUES(randomblob(1000), randomblob(1000));
INSERT INTO t1 SELECT randomblob(1000), randomblob(1000) FROM t1;
INSERT INTO t1 SELECT randomblob(1000), randomblob(1000) FROM t1;
INSERT INTO t1 SELECT randomblob(1000), randomblob(1000) FROM t1;
INSERT INTO t1 SELECT randomblob(1000), randomblob(1000) FROM t1;
INSERT INTO t1 SELECT randomblob(1000), randomblob(1000) FROM t1;
INSERT INTO t1 SELECT randomblob(1000), randomblob(1000) FROM t1;
}
set nFail [test_syscall fault 0 0]
do_execsql_test 1.$syscall.$i.2 {
SELECT count(*) FROM t1;
PRAGMA integrity_check;
} {64 ok}
do_test 1.$syscall.$i.3 {
expr {$nFail==0 || $nFail==1}
} {1}
do_test 1.$syscall.$i.4.nFail=$nFail {
regexp ".*${syscall}.*" $::log
} [expr $nFail>0]
}
}
db close
test_syscall uninstall
sqlite3_shutdown
test_sqlite3_log
sqlite3_initialize
finish_test