Bug #51580 [Fbk->Opn]: socket_select randomly crashes when used together with fork and Unix signals

Edit report at http://bugs.php.net/bug.php?id=51580&edit=1 ID: 51580 User updated by: marco at vmsoft-gbr dot de Reported by: marco at vmsoft-gbr dot de Summary: socket_select randomly crashes when used together with fork and Unix signals -Status: Feedback +Status: Open Type: Bug Package: PCNTL related Operating System: Debian Linux PHP Version: 5.3.2 New Comment: PHP itself doesn't crash, the error is not fatal - and how do I make a gdb backtrace on a forked process, anyway? Previous Comments: ------------------------------------------------------------------------ [2010-04-17 03:51:06] pajoye@php.net Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php for *NIX and http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32 Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. ------------------------------------------------------------------------ [2010-04-17 02:11:01] marco at vmsoft-gbr dot de Description: ------------ When firing unix signals onto a forked process with pcntl_signal handlers active and a socket_select currently running, socket_select may crash. Run the test script with php test.php 1339, and then launch some "kill -s 10 <child pid>" on it. After some, maybe just one, kill's, the script will crash. Test script: --------------- http://php.pastebin.com/Td68vtMn Expected result: ---------------- Installing signal handlers Installing handler for signal 15 Installing handler for signal 10 child-pid 20030 running marco@vs932:~/php_daemon$ kill -s 10 20030 got signal 10 marco@vs932:~/php_daemon$ kill -s 10 20030 got signal 10 marco@vs932:~/php_daemon$ kill -s 10 20030 got signal 10 (etc) Actual result: -------------- Installing signal handlers Installing handler for signal 15 Installing handler for signal 10 child-pid 20030 running marco@vs932:~/php_daemon$ kill -s 10 20030 got signal 10 marco@vs932:~/php_daemon$ kill -s 10 20030 got signal 10 marco@vs932:~/php_daemon$ kill -s 10 20030 got signal 10 marco@vs932:~/php_daemon$ kill -s 10 20030 marco@vs932:~/php_daemon$ PHP Warning: socket_select(): unable to select [4]: Interrupted system call in /home/marco/php_daemon/test.php on line 39 socket_select failed: Interrupted system call end marco@vs932:~/php_daemon$ ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=51580&edit=1