Bug #80728 [NEW]: PHP built-in web server resets timeout when it can kill the process

From: calvin at cmpct dot info Operating system: Fedora 33 PHP version: 7.4.15 Package: Built-in web server Bug Type: Bug Bug description:PHP built-in web server resets timeout when it can kill the process Description: ------------ When the PHP built-in development webserver finishes a request, it resets PHP's timer to defaults. On ITIMER_PROF (most) platforms, this usually isn't a problem because listening causes PHP to block on listen, stopping it from counting in execution time. On ITIMER_REAL platforms (IBM i and Cygwin), the timer will continue to count down and hit the hard timeout, killing an idle PHP development web server. (This may affect other mediums of PHP, but the development web server is the easiest case.) The attached patch will add debug output for handling the ITIMER cases and let you force ITIMER_REAL on Linux. The issue is likely reproducible on 7.3 and 8.0. Test script: --------------- <?php set_time_limit(10); // recommend setting to a large value to diagnose ITIMER_REAL $i = 0; while(true) { sleep(1); // comment if using ITIMER_PROF because it won't count echo "$i<br/>\n"; $i++; ob_flush(); flush(); } Expected result: ---------------- $ (cd ~/src/long/; /tmp/php7.4/bin/php -S 0.0.0.0:8080; date) [Wed Feb 10 13:19:30 2021] PHP 7.4.15RC1 Development Server (http://0.0.0.0:8080) started [Wed Feb 10 13:19:30 2021] 127.0.0.1:45308 Accepted ** Setting prof timer for 30.0 seconds ** ** UnSetting prof timer ** ** Setting prof timer for 10.0 seconds ** ** Setting prof timer for 2.0 seconds ** [Wed Feb 10 13:19:41 2021] 127.0.0.1:45308 [200]: GET / - Maximum execution time of 10 seconds exceeded in /home/calvin/src/long/index.php on line 11 ** UnSetting prof timer ** ** UnSetting prof timer ** ** Setting prof timer for 30.0 seconds ** [Wed Feb 10 13:19:41 2021] 127.0.0.1:45308 Closing Actual result: -------------- $ (cd ~/src/long/; /tmp/php7.4/bin/php -S 0.0.0.0:8080; date) [Wed Feb 10 13:13:34 2021] PHP 7.4.15RC1 Development Server (http://0.0.0.0:8080) started [Wed Feb 10 13:13:38 2021] 127.0.0.1:45126 Accepted ** Setting real timer for 30.0 seconds ** ** UnSetting real timer ** ** Setting real timer for 10.0 seconds ** ** Setting real timer for 2.0 seconds ** [Wed Feb 10 13:13:48 2021] 127.0.0.1:45126 [200]: GET / - Maximum execution time of 10 seconds exceeded in /home/calvin/src/long/index.php on line 8 ** UnSetting real timer ** ** UnSetting real timer ** ** Setting real timer for 30.0 seconds ** [Wed Feb 10 13:13:48 2021] 127.0.0.1:45126 Closing [Wed Feb 10 13:13:48 2021] 127.0.0.1:45128 Accepted [Wed Feb 10 13:13:48 2021] 127.0.0.1:45128 Closed without sending a request; it was probably just an unused speculative preconnection [Wed Feb 10 13:13:48 2021] 127.0.0.1:45128 Closing ** Setting real timer for 2.0 seconds ** Fatal error: Maximum execution time of 30+2 seconds exceeded (terminated) in Unknown on line 0 Wed 10 Feb 2021 01:14:20 PM AST -- Edit bug report at https://bugs.php.net/bug.php?id=80728&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80728&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80728&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80728&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80728&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80728&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80728&r=support Expected behavior: https://bugs.php.net/fix.php?id=80728&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80728&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80728&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80728&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80728&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80728&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80728&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80728&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80728&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80728&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80728&r=mysqlcfg