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105 lines
2.7 KiB
Plaintext
105 lines
2.7 KiB
Plaintext
# 2016 February 04
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# This file tests the effect of the mmap() or mremap() system calls
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# returning an error on the library.
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#
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# If either mmap() or mremap() fails, SQLite should log an error
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# message, then continue accessing the database using read() and
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# write() exclusively.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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ifcapable !mmap {
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finish_test
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return
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}
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source $testdir/lock_common.tcl
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set testprefix mmap4
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# Return a Tcl script that registers a user-defined scalar function
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# named rblob() with database handle $dbname. The function returns a
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# sequence of pseudo-random blobs based on seed value $seed.
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#
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proc register_rblob_code {dbname seed} {
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return [subst -nocommands {
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set ::rcnt $seed
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proc rblob {n} {
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set ::rcnt [expr (([set ::rcnt] << 3) + [set ::rcnt] + 456) & 0xFFFFFFFF]
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set str [format %.8x [expr [set ::rcnt] ^ 0xbdf20da3]]
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string range [string repeat [set str] [expr [set n]/4]] 1 [set n]
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}
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$dbname func rblob rblob
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}]
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}
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#-------------------------------------------------------------------------
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# Test various mmap_size settings.
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#
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foreach {tn1 mmap1 mmap2} {
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1 6144 167773
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2 18432 140399
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3 43008 401302
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4 92160 253899
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5 190464 2
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6 387072 752431
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7 780288 291143
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8 1566720 594306
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9 3139584 829137
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10 6285312 793963
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11 12576768 1015590
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} {
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do_multiclient_test tn {
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sql1 {
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CREATE TABLE t1(a PRIMARY KEY);
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CREATE TABLE t2(x);
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INSERT INTO t2 VALUES('');
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}
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code1 [register_rblob_code db 0]
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code2 [register_rblob_code db2 444]
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sql1 "PRAGMA mmap_size = $mmap1"
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sql2 "PRAGMA mmap_size = $mmap2"
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do_test $tn1.$tn {
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for {set i 1} {$i <= 100} {incr i} {
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if {$i % 2} {
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set c1 sql1
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set c2 sql2
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} else {
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set c1 sql2
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set c2 sql1
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}
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$c1 {
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INSERT INTO t1 VALUES( rblob(5000) );
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UPDATE t2 SET x = (SELECT md5sum(a) FROM t1);
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}
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set res [$c2 {
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SELECT count(*) FROM t1;
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SELECT x == (SELECT md5sum(a) FROM t1) FROM t2;
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PRAGMA integrity_check;
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}]
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if {$res != [list $i 1 ok]} {
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do_test $tn1.$tn.$i {
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set ::res
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} [list $i 1 ok]
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}
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}
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set res 1
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} {1}
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}
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}
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finish_test
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