Bug #78881 [Ver->Csd]: "Can't preload unlinked class" if class extends Exception

From: Date: Tue, 16 Jun 2020 16:54:31 +0000
Subject: Bug #78881 [Ver->Csd]: "Can't preload unlinked class" if class extends Exception
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-227518@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=78881&edit=1

 ID:                 78881
 Updated by:         cmb@php.net
 Reported by:        mlocati at gmail dot com
 Summary:            "Can't preload unlinked class" if class extends
                     Exception
-Status:             Verified
+Status:             Closed
 Type:               Bug
 Package:            opcache
 Operating System:   Windows
 PHP Version:        7.4.0
 Assigned To:        cmb
 Block user comment: N
 Private report:     N

 New Comment:

That PR has been merged long ago – closing.


Previous Comments:
------------------------------------------------------------------------
[2019-12-13 10:14:32] nikic@php.net

The following pull request has been associated:

Patch Name: Remove support for preloading on Windows
On GitHub:  https://github.com/php/php-src/pull/4999
Patch:      https://github.com/php/php-src/pull/4999.patch

------------------------------------------------------------------------
[2019-12-10 12:29:59] cmb@php.net

The problem is that internal class entries are stored on the heap,
and the position of the heap is randomized by ASLR on Windows, so
there seems to be nothing we can do (at least for PHP 7.4 due to
BC restrictions).

------------------------------------------------------------------------
[2019-12-10 12:16:45] michael dot vorisek at email dot cz

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.

------------------------------------------------------------------------
[2019-12-04 08:54:17] nikic@php.net

I've added an improved error in https://github.com/php/php-src/commit/7cbf31a3c754961e0ebfd5022191c1c9080effdb.

------------------------------------------------------------------------
[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.

------------------------------------------------------------------------


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=78881


--
Edit this bug report at https://bugs.php.net/bug.php?id=78881&edit=1

Thread (8 messages)

« previous php.bugs (#227518) next »