Bug #80422 [Asn]: php_opcache.dll crashes when using Apache 2.4 with JIT

Edit report at https://bugs.php.net/bug.php?id=80422&edit=1 ID: 80422 User updated by: martin at radiok2r dot de Reported by: martin at radiok2r dot de Summary: php_opcache.dll crashes when using Apache 2.4 with JIT Status: Assigned Type: Bug Package: JIT Operating System: Windows 10 64-bit PHP Version: 8.0.0 Assigned To: dmitry Block user comment: N Private report: N New Comment: Thanks for your reply and all your hints! It all works with opcache.jit=1205 without problems. Without opcache.jit=1205 (no setting for opcache.jit at all in the php.ini) this php-code crashes: <?php print "Hello world\r\n"; print $_SERVER["DOCUMENT_ROOT"]."\r\n"; for ($i = 0; $i < 100; $i++) { $b = file_exists($_SERVER["DOCUMENT_ROOT"]."/index.php"); } print "It worked"; When reducing the loop to run 50 times it works, but 100 times is too much and it crashes. Hope this helps. Previous Comments: ------------------------------------------------------------------------ [2020-12-14 13:42:57] dmitry@php.net Also try to reproduce the same problem with opcache.jit=1205. If you see the same crash, try to isolate the problem with opcache.jit=1205 (it should be easier). ------------------------------------------------------------------------ [2020-12-14 13:39:11] dmitry@php.net Check what page causes the crash. Try to reproduce the same crash, passing the script and CGI environment variables command line PHP (or PHP-CGI). If the application doesn't use external resources (DB, etc) and doesn't contain sensitive data, you may just pack and send it to me (with instruction, how to reproduce the crash). Otherwise, you need to track down to the problem yourself... You may catch the crash in debugger and check the PHP source position printing (char*)executor_globals.current_execute_data->func->op_array.function_name.val and executor_globals.current_execute_data->opline->lineno. Then try to isolate the function(s) involved into crash. This is not a simple task... ------------------------------------------------------------------------ [2020-12-14 13:34:20] martin at radiok2r dot de I tried to debug the process httpd by VS -> Debug -> Attach to Process. There are 2 httpd-processes, and I get for the first: php_opcache.dll!zend_jit_trace_exit_is_hot(unsigned int trace_num, unsigned int exit_num) Line 6916 C php_opcache.dll!zend_jit_trace_exit(unsigned int exit_num, Line 7343 C [External Code] php8ts.dll!00007ffaa0225d88() Unknown And for the second: ntdll.dll!KiRaiseUserExceptionDispatcher() Unknown KernelBase.dll!00007ffacf202cb5() Unknown libapr-1.dll!00000000569d88bd() Unknown libapr-1.dll!00000000569d8752() Unknown mod_socache_shmcb.so!00007ffaa1f5169c() Unknown mod_ssl.so!00007ffaa1f25382() Unknown mod_ssl.so!00007ffaa1f15b57() Unknown libapr-1.dll!00000000569ce24e() Unknown httpd.exe!00007ff7ea281c6c() Unknown httpd.exe!00007ff7ea282fa4() Unknown [External Code] Thanks for looking into this! ------------------------------------------------------------------------ [2020-12-14 13:16:02] martin at radiok2r dot de What could I do? I have a VisualStudio 2013 running on the machine, might this help? Any other parameters I could try in php.ini to make it work? ------------------------------------------------------------------------ [2020-12-14 13:10:02] dmitry@php.net Unfortunately, the backtrace is not enough to guess the reason of the crash. We need some way to reproduce the failure. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=80422 -- Edit this bug report at https://bugs.php.net/bug.php?id=80422&edit=1