From:
Operating system: Win32
PHP version: 5.3.3
Package: Unknown/Other Function
Bug Type: Bug
Bug description:gettimeofday implementation in php/win32/time.c can return 1mil
usecs.
Description:
------------
in source file php/win32/time.c in function
PHPAPI int gettimeofday(struct timeval *time_Info, struct timezone
*timezone_Info)
toward end (L108 in 5.3.3 sources) there is this block of code:
if (time_Info->tv_usec > 1000000) {
time_Info->tv_usec -= 1000000;
++time_Info->tv_sec;
}
Doing >= would be more correct, like this:
if (time_Info->tv_usec >= 1000000) {
time_Info->tv_usec -= 1000000;
++time_Info->tv_sec;
}
(for most of the gettimeofday usage this is very minor bug, but while
profiling with xdebug extension on windows platform this does expose the
xdebug bug http://bugs.xdebug.org/view.php?id=357 which together leads to
garbage profiling results)
Attached script does expose the problem also trough PHP (it fails at my
machine quite regularly, shouldn't take more then 2-3 runs to catch it).
Test script:
---------------
<?php
$safety_counter = 0;
do {
$t = gettimeofday();
} while( $t['usec'] < 1000000 && $safety_counter++ < 1000000 );
if ( $t['usec'] == 1000000 ) {
echo '<pre>', print_r( $t, TRUE ), '</pre>';
die('Returned gettimeofday array contains 1mil+ of microseconds (which
is
1second)!');
}
echo 'The gettimeofday didn\'t produce wrong value (tried it 1mil times).
Try again!';
?>
Expected result:
----------------
The returned $t['usec'] should never contain value >= 1000000, so the
script should always end with final echo.
Actual result:
--------------
$t['usec'] == 1000000 occasionally (on my machine at least once per 5 runs
of script).
--
Edit bug report at http://bugs.php.net/bug.php?id=53297&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=53297&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=53297&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=53297&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=53297&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=53297&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=53297&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=53297&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=53297&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=53297&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=53297&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=53297&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=53297&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=53297&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=53297&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53297&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=53297&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=53297&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=53297&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=53297&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=53297&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=53297&r=mysqlcfg
