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Fixed core dump bug when hot link list in key cache was empty. Bug #10167

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mysql-test/r/drop.result:
  Fixed result
This commit is contained in:
unknown
2005-04-27 14:31:04 +03:00
parent bf17c826de
commit b00b2126de
3 changed files with 221 additions and 6 deletions
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4
mysql-test/r/drop.result
View File

@ -30,13 +30,13 @@ table7, table8, table9, table10, table11, table12, table13,
table14, table15, table16, table17, table18, table19, table20,
table21, table22, table23, table24, table25, table26, table27,
table28;
ERROR 42S02: Unknown table 'table1,table2,table3,table4,table5,table6,table7,table8,table9,table10,table11,table12,table13,table14,table15,table16,table17,table18,table19,table20,table21,table22,table23,table'
ERROR 42S02: Unknown table 'table1,table2,table3,table4,table5,table6,table7,table8,table9,table10,table11,table12,table13,table'
drop table table1, table2, table3, table4, table5, table6,
table7, table8, table9, table10, table11, table12, table13,
table14, table15, table16, table17, table18, table19, table20,
table21, table22, table23, table24, table25, table26, table27,
table28, table29, table30;
ERROR 42S02: Unknown table 'table1,table2,table3,table4,table5,table6,table7,table8,table9,table10,table11,table12,table13,table14,table15,table16,table17,table18,table19,table20,table21,table22,table23,table'
ERROR 42S02: Unknown table 'table1,table2,table3,table4,table5,table6,table7,table8,table9,table10,table11,table12,table13,table'
use test;
drop database mysqltest;
flush tables with read lock;

9
mysys/mf_keycache.c
View File

@ -1025,7 +1025,7 @@ static void reg_requests(KEY_CACHE *keycache, BLOCK_LINK *block, int count)
for a too long time (this time is determined by parameter age_threshold).
*/
static inline void unreg_request(KEY_CACHE *keycache,
static void unreg_request(KEY_CACHE *keycache,
BLOCK_LINK *block, int at_end)
{
if (! --block->requests)
@ -1045,10 +1045,13 @@ static inline void unreg_request(KEY_CACHE *keycache,
}
link_block(keycache, block, hot, (my_bool)at_end);
block->last_hit_time= keycache->keycache_time;
if (++keycache->keycache_time - keycache->used_ins->last_hit_time >
keycache->keycache_time++;
block= keycache->used_ins;
/* Check if we should link a hot block to the warm block */
if (block && keycache->keycache_time - block->last_hit_time >
keycache->age_threshold)
{
block= keycache->used_ins;
unlink_block(keycache, block);
link_block(keycache, block, 0, 0);
if (block->temperature != BLOCK_WARM)

212
tests/index_corrupt.pl Executable file
View File

@ -0,0 +1,212 @@
#!/usr/bin/perl -w
#
# This is a test for a key cache bug (bug #10167)
# To expose the bug mysqld should be started with --key-buffer-size=64K
#
$opt_loop_count=100000; # Change this to make test harder/easier
##################### Standard benchmark inits ##############################
use DBI;
use Getopt::Long;
use Benchmark;
package main;
$opt_skip_create=$opt_skip_in=$opt_verbose=$opt_fast_insert=
$opt_lock_tables=$opt_debug=$opt_skip_delete=$opt_fast=$opt_force=0;
$opt_host=$opt_user=$opt_password=""; $opt_db="test";
GetOptions("host=s","db=s","loop-count=i","skip-create","skip-in",
"skip-delete","verbose","fast-insert","lock-tables","debug","fast",
"force","user=s","password=s") || die "Aborted";
$opt_verbose=$opt_debug=$opt_lock_tables=$opt_fast_insert=$opt_fast=$opt_skip_in=$opt_force=undef; # Ignore warnings from these
$firsttable = "bench_f1";
$secondtable = "bench_f2";
$kill_file= "/tmp/mysqltest_index_corrupt.$$";
####
#### Start timeing and start test
####
$start_time=new Benchmark;
if (!$opt_skip_create)
{
$dbh = DBI->connect("DBI:mysql:$opt_db:$opt_host",
$opt_user, $opt_password,
{ PrintError => 0}) || die $DBI::errstr;
$dbh->do("drop table if exists $firsttable, $secondtable");
print "Creating tables in $opt_db\n";
$dbh->do("create table $firsttable (
c_pollid INTEGER NOT NULL,
c_time BIGINT NOT NULL,
c_data DOUBLE NOT NULL,
c_error INTEGER NOT NULL,
c_warning INTEGER NOT NULL,
c_okay INTEGER NOT NULL,
c_unknown INTEGER NOT NULL,
c_rolled_up BIT NOT NULL,
INDEX t_mgmt_hist_r_i1 (c_pollid),
INDEX t_mgmt_hist_r_i2 (c_time),
INDEX t_mgmt_hist_r_i3 (c_rolled_up))") or die $DBI::errstr;
$dbh->do("create table $secondtable (
c_pollid INTEGER NOT NULL,
c_min_time BIGINT NOT NULL,
c_max_time BIGINT NOT NULL,
c_min_data DOUBLE NOT NULL,
c_max_data DOUBLE NOT NULL,
c_avg_data DOUBLE NOT NULL,
c_error INTEGER NOT NULL,
c_warning INTEGER NOT NULL,
c_okay INTEGER NOT NULL,
c_unknown INTEGER NOT NULL,
c_rolled_up BIT NOT NULL,
INDEX t_mgmt_hist_d_i1 (c_pollid),
INDEX t_mgmt_hist_d_i2 (c_min_time),
INDEX t_mgmt_hist_d_i3 (c_max_time),
INDEX t_mgmt_hist_d_i4 (c_rolled_up))") or die $DBI::errstr;
$dbh->disconnect; $dbh=0; # Close handler
}
$|= 1; # Autoflush
####
#### Start the tests
####
print "Running tests\n";
insert_in_bench() if (($pid=fork()) == 0); $work{$pid}="insert";
select_from_bench() if (($pid=fork()) == 0); $work{$pid}="insert-select;
delete_from_bench() if (($pid=fork()) == 0); $work{$pid}="delete";
$errors=0;
while (($pid=wait()) != -1)
{
$ret=$?/256;
print "thread '" . $work{$pid} . "' finished with exit code $ret\n";
$errors++ if ($ret != 0);
}
if (!$opt_skip_delete && !$errors)
{
$dbh = DBI->connect("DBI:mysql:$opt_db:$opt_host",
$opt_user, $opt_password,
{ PrintError => 0}) || die $DBI::errstr;
$dbh->do("drop table $firsttable, $secondtable");
}
print ($errors ? "Test failed\n" :"Test ok\n");
$end_time=new Benchmark;
print "Total time: " .
timestr(timediff($end_time, $start_time),"noc") . "\n";
unlink $kill_file;
exit(0);
#
# Insert records in the two tables
#
sub insert_in_bench
{
my ($dbh,$rows,$found,$i);
$dbh = DBI->connect("DBI:mysql:$opt_db:$opt_host",
$opt_user, $opt_password,
{ PrintError => 0}) || die $DBI::errstr;
for ($rows= 1; $rows <= $opt_loop_count ; $rows++)
{
$c_pollid = sprintf("%d",rand 1000);
$c_time = sprintf("%d",rand 100000);
$c_data = rand 1000000;
$test = rand 1;
$c_error=0;
$c_warning=0;
$c_okay=0;
$c_unknown=0;
if ($test < .8) {
$c_okay=1;
} elsif ($test <.9) {
$c_error=1;
} elsif ($test <.95) {
$c_warning=1;
} else {
$c_unknown=1;
}
$statement = "INSERT INTO $firsttable (c_pollid, c_time, c_data, c_error
, c_warning, c_okay, c_unknown, c_rolled_up) ".
"VALUES ($c_pollid,$c_time,$c_data,$c_error,$c_warning,$c_okay,$c_unknown,0)";
$cursor = $dbh->prepare($statement);
$cursor->execute();
$cursor->finish();
}
$dbh->disconnect; $dbh=0;
print "insert_in_bench: Inserted $rows rows\n";
# Kill other threads
open(KILLFILE, "> $kill_file");
close(KILLFILE);
exit(0);
}
sub select_from_bench
{
my ($dbh,$rows,$cursor);
$dbh = DBI->connect("DBI:mysql:$opt_db:$opt_host",
$opt_user, $opt_password,
{ PrintError => 0}) || die $DBI::errstr;
for ($rows= 1; $rows < $opt_loop_count ; $rows++)
{
$t_value = rand 100000;
$t_value2 = $t_value+10000;
$statement = "INSERT INTO $secondtable (c_pollid, c_min_time, c_max_time
, c_min_data, c_max_data, c_avg_data, c_error, c_warning, c_okay, c_unknown, c_rolled_up) SELECT c_pollid, MIN(c_time), MAX(c_time), MIN(c_data), MAX(c_data), AVG(c_data), SUM(c_error), SUM(c_warning), SUM(c_okay), SUM(c_unknown), 0 FROM $firsttable WHERE (c_time>=$t_value) AND (c_time<$t_value2) AND (c_rolled_up=0) GROUP BY c_pollid";
$cursor = $dbh->prepare($statement);
$cursor->execute();
$cursor->finish();
sleep 1;
if (-e $kill_file)
{
last;
}
}
print "select_from_bench: insert-select executed $rows times\n";
exit(0);
}
sub delete_from_bench
{
my ($dbh,$row, $t_value, $t2_value, $statement, $cursor);
$dbh = DBI->connect("DBI:mysql:$opt_db:$opt_host",
$opt_user, $opt_password,
{ PrintError => 0}) || die $DBI::errstr;
for ($rows= 1; $rows < $opt_loop_count ; $rows++)
{
$t_value = rand 50000;
$t2_value = $t_value + 50001;
$statement = "DELETE FROM $firsttable WHERE (c_time>$t_value) AND (c_time<$t2_value)";
$cursor = $dbh->prepare($statement);
$cursor->execute();
$cursor->finish();
sleep 10;
if (-e $kill_file)
{
last;
}
}
print "delete: delete executed $rows times\n";
exit(0);
}