ID: 26949 User updated by: alucard at vitriolic dot org Reported By: alucard at vitriolic dot org -Status: Feedback +Status: Open Bug Type: Math related Operating System: Solaris 9 PHP Version: 4CVS-2004-01-18 New Comment:
No worries, I don't mind helping you troubleshoot this one. Not many folks run Solaris boxen as their home machines, can't imagine why...;) Without ZTS: # sapi/cli/php -r 'echo getrandmax(),"\n";' 2147483647 # sapi/cli/php -r 'srand(); echo rand(0,100),"\n";' 32 # sapi/cli/php -r 'srand(); echo rand(0,100),"\n";' 5 # # sapi/cli/php -r 'srand(); echo rand(0,100),"\n";' 22 With ZTS: # sapi/cli/php -r 'echo getrandmax(),"\n";' 2147483647 # sapi/cli/php -r 'srand(); echo rand(0,100),"\n";' 0 # sapi/cli/php -r 'srand(); echo rand(0,100),"\n";' 0 # sapi/cli/php -r 'srand(); echo rand(0,100),"\n";' 0 The value returned by getrandmax() is definitely not what's being used by rand() with ZTS enabled. Calling rand() approx. 150 times and sending the output to a file, the highest value I get is 32481. This leads me to believe that despite what's being returned by getrandmax(), it's using 32768 as its max in operation. mt_rand() works as expected with ZTS enabled, both with and without ranges specified: # sapi/cli/php -r 'echo mt_rand(),"\n";' 1128343079 # sapi/cli/php -r 'echo mt_rand(),"\n";' 1820256748 # sapi/cli/php -r 'echo mt_rand(0,100),"\n";' 68 # sapi/cli/php -r 'echo mt_rand(0,100),"\n";' 83 # sapi/cli/php -r 'echo mt_rand(0,100),"\n";' 54 mt_getrandmax() returns the same result as getrandmax() (but, as shown above, appears to actually use it). # sapi/cli/php -r 'echo mt_getrandmax(),"\n";' 2147483647 Previous Comments: ------------------------------------------------------------------------ [2004-01-18 09:36:42] [EMAIL PROTECTED] Also, what does this output (in zts and in non-zts mode): # sapi/cli/php 'echo getrandmax();' ------------------------------------------------------------------------ [2004-01-18 09:35:02] [EMAIL PROTECTED] Try adding 'srand();' call there: # sapi/cli/php -r 'srand(); echo rand(0,100),"\n";' Does this work better? (Note: I can not reproduce this within Linux) ------------------------------------------------------------------------ [2004-01-18 02:04:50] alucard at vitriolic dot org Same results: # rm config.cache config.cache: No such file or directory # ./configure --disable-all --disable-cgi --enable-experimental-zts # make clean && make # sapi/cli/php -r 'echo rand(),"\n"; echo rand(0,100),"\n";' 29622 0 # sapi/cli/php -r 'echo rand(),"\n"; echo rand(0,100),"\n";' 6807 0 # sapi/cli/php -r 'echo rand(),"\n"; echo rand(0,100),"\n";' 2050 0 # sapi/cli/php -v PHP 4.3.5RC2-dev (cli) (built: Jan 18 2004 00:52:22) Without zts enabled, the results are: # sapi/cli/php -r 'echo rand(),"\n"; echo rand(0,100),"\n";' 2121634529 48 # sapi/cli/php -r 'echo rand(),"\n"; echo rand(0,100),"\n";' 1303411959 20 ------------------------------------------------------------------------ [2004-01-17 20:20:48] [EMAIL PROTECTED] Please try using this CVS snapshot: http://snaps.php.net/php4-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-STABLE-latest.zip ------------------------------------------------------------------------ [2004-01-17 17:34:41] alucard at vitriolic dot org Description: ------------ Bug #24909 is still an issue with latest build and Solaris 9. When rand() is called with no arguments, it operates as expected. When rand(min,max) is called, it always returns value 'min'. This problem only occurs when ZTS is enabled. When it's not, both calls to rand() work as expected, though the value ranges are completely different. To demonstrate: # uname -a SunOS XXXXXX 5.9 Generic_112233-08 sun4u sparc SUNW,Ultra-Enterprise # rm config.cache # ./configure --disable-all --disable-cgi --enable-experimental-zts # make clean && make # sapi/cli/php -r 'echo rand(),"\n"; echo rand(0,100),"\n";' 28909 0 # sapi/cli/php -r 'echo rand(),"\n"; echo rand(0,100),"\n";' 21885 0 # rm config.cache # ./configure --disable-all --disable-cgi # make clean && make # sapi/cli/php -r 'echo rand(),"\n"; echo rand(0,100),"\n";' 1116498057 87 # sapi/cli/php -r 'echo rand(),"\n"; echo rand(0,100),"\n";' 102735333 95 Note that with zts enabled, the rand() values are much smaller, and rand(min,max) always returns min. Without it, rand values are much larger, and rand(min,max) operates as expected. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=26949&edit=1
