Bug #78881 [Com]: "Can't preload unlinked class" if class extends Exception
Edit report at https://bugs.php.net/bug.php?id=78881&edit=1
ID: 78881
Comment by: michael dot vorisek at email dot cz
Reported by: mlocati at gmail dot com
Summary: "Can't preload unlinked class" if class extends
Exception
Status: Verified
Type: Bug
Package: opcache
Operating System: Windows
PHP Version: 7.4.0
Assigned To: cmb
Block user comment: N
Private report: N
New Comment:
This should be fixed in PHP internally. \Exception class is maybe the most extended one and
preloading one or more extended \Exception classes is more than expected.
Previous Comments:
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[2019-12-04 08:54:17] nikic@php.net
I've added an improved error in https://github.com/php/php-src/commit/7cbf31a3c754961e0ebfd5022191c1c9080effdb.
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[2019-12-04 08:45:51] nikic@php.net
This is expected: On Windows, due to ASLR, internal classes are unknown for the purposes of
preloading.
I think the only thing we can do here is a) improve the error message (it should not be
"unknown reason") and b) documented this limitation.
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[2019-11-28 23:06:10] cmb@php.net
Thanks for reporting!
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[2019-11-28 17:51:06] mlocati at gmail dot com
Description:
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I have this file, saved as J:\tmp\MyException.php
<?php
class MyException extends Exception {}
I have this file, saved as J:\tmp\preload.php
<?php
opcache_compile_file('J:\\tmp\\MyException.php');
I have this file, saved as J:\tmp\php.ini:
log_errors = On
display_startup_errors = On
extension_dir=C:\Dev\PHP7.4\ext
zend_extension=opcache
opcache.enable_cli=1
opcache.preload=J:\tmp\preload.php
I have downloaded PHP 7.4.0 for Windows, 32 bits, thread safe, to C:\Dev\PHP7.4
If I run this command from the Windows terminal:
C:\Dev\PHP7.4\php.exe -c J:\tmp\php.ini -v
Here's the output:
PHP Warning: Can't preload unlinked class MyException: Unknown reason in
J:\tmp\MyException.php on line 2
Warning: Can't preload unlinked class MyException: Unknown reason in J:\tmp\MyException.php on
line 2
PHP 7.4.0 (cli) (built: Nov 27 2019 10:15:52) ( ZTS Visual C++ 2017 x86 )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
with Zend OPcache v7.4.0, Copyright (c), by Zend Technologies
If I edit the J:\tmp\MyException.php, removing "extends Exception", the output is:
PHP 7.4.0 (cli) (built: Nov 27 2019 10:15:52) ( ZTS Visual C++ 2017 x86 )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
with Zend OPcache v7.4.0, Copyright (c), by Zend Technologies
So, it seems that preload doesn't work if a class extends Exception...
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Edit this bug report at https://bugs.php.net/bug.php?id=78881&edit=1
Thread (8 messages)