Edit report at https://bugs.php.net/bug.php?id=79043&edit=1
ID: 79043
Updated by: nikic@php.net
Reported by: benjamin dot morel at gmail dot com
Summary: Segmentation fault when using preloading
-Status: Open
+Status: Feedback
Type: Bug
Package: opcache
Operating System: CentOS 7.7
PHP Version: 7.4.1
Block user comment: N
Private report: N
New Comment:
As bugreports@ mentioned, PHP 7.4.1 has quite a few known issues relating to preloading -- lacking
any further context, it is quite likely that the bug you are hitting has already been fixed. If you
can, please test current PHP 7.4 HEAD, or else wait until the 7.4.2 release in January to give this
another try.
If you can send me a set of files that trigger a crash when preloading to nikic@php.net, I can also
try whether I can reproduce this locally.
Previous Comments:
------------------------------------------------------------------------
[2019-12-29 15:29:05] bugreports at gmail dot com
PHP Version: 7.4.1
this is a bad idea for reporting bugs
https://git.php.net/?p=php-src.git;a=shortlog;h=refs/heads/PHP-7.4
there where ton of fixes in the meantime, many of them affecting preloading
------------------------------------------------------------------------
[2019-12-29 15:23:17] benjamin dot morel at gmail dot com
Description:
------------
I'm attempting to preload ~3000 PHP classes in my web app, with a simple preloading script that
basically calls opcache_compile_file() on each file contained in Composer's
autoload_classmap.php, minus a few namespaces that contain many files that are rarely used. I'm
including the preload.php script in the "Test script" section here.
When I activate preloading in opcache.ini:
opcache.preload=/path/to/preload.php
I get 503 errors from Apache, that suddenly can't connect to php-fpm.
A quick look at /var/log/php-fpm/error.log shows the following errors:
[29-Dec-2019 16:12:56] NOTICE: [pool nicebooks] child 23191 started
[29-Dec-2019 16:12:56] WARNING: [pool www] child 23182 exited on signal 11 (SIGSEGV) after 0.002705
seconds from start
[29-Dec-2019 16:12:56] NOTICE: [pool www] child 23192 started
[29-Dec-2019 16:12:56] WARNING: [pool www] child 23183 exited on signal 11 (SIGSEGV) after 0.002702
seconds from start
[29-Dec-2019 16:12:56] NOTICE: [pool www] child 23193 started
[29-Dec-2019 16:12:56] WARNING: [pool nicebooks] child 23184 exited on signal 11 (SIGSEGV) after
0.002710 seconds from start
[29-Dec-2019 16:12:56] NOTICE: [pool nicebooks] child 23194 started
[29-Dec-2019 16:12:56] WARNING: [pool nicebooks] child 23185 exited on signal 11 (SIGSEGV) after
0.002746 seconds from start
[29-Dec-2019 16:12:56] NOTICE: [pool nicebooks] child 23196 started
[29-Dec-2019 16:12:56] WARNING: [pool www] child 23186 exited on signal 11 (SIGSEGV) after 0.002733
seconds from start
Looks like all php-fpm workers segfault right after starting with preloading enabled.
I'm not sure how I can provide a minimum reproducible example without giving out the whole
project source.
Test script:
---------------
<?php
// preload.php
$blacklist = [
'Amazon\\ProductAdvertisingAPI\\',
'Aws\\',
'Brick\\Schema\\',
'DTS\\eBaySDK\\',
'Google\\AdsApi\\',
'phpDocumentor\\'
];
$files = require __DIR__ . '/vendor/composer/autoload_classmap.php';
$filtered = [];
foreach ($files as $class => $file) {
foreach ($blacklist as $prefix) {
if (strpos($class, $prefix) === 0) {
continue 2;
}
}
$filtered[$class] = $file;
}
foreach (array_unique($filtered) as $file) {
opcache_compile_file($file);
}
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=79043&edit=1