Bug #80745 [Com]: JIT produces Assert failure and UNKNOWN:0 var_dumps in code involving bitshifts
| From: | JaxkDev at gmail dot com | Date: | Sat, 13 Feb 2021 17:39:17 +0000 |
| Subject: | Bug #80745 [Com]: JIT produces Assert failure and UNKNOWN:0 var_dumps in code involving bitshifts | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-232135@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=80745&edit=1
ID: 80745
Comment by: JaxkDev at gmail dot com
Reported by: dktapps at pmmp dot io
Summary: JIT produces Assert failure and UNKNOWN:0 var_dumps
in code involving bitshifts
Status: Open
Type: Bug
Package: JIT
Operating System: Linux
PHP Version: 8.0.2
Block user comment: N
Private report: N
New Comment:
Reproduced on windows 10 (10.0.19042.804), PHP 8.0.2 ZTS (opcache.jit=1205)
Previous Comments:
------------------------------------------------------------------------
[2021-02-13 16:16:09] dktapps at pmmp dot io
Description:
------------
The following code crashes with PHP 8.0.2 ZTS DEBUG when opcache is enabled using opcache.jit=1205.
This happens on both Windows and Linux.
Test script:
---------------
<?php
final class Message
{
public $qr = false;
public $opcode = 0;
public $aa = false;
}
echo "Starting...\n";
function headerToBinary(Message $message)
{
$flags = 0;
$flags = ($flags << 1) | ($message->qr ? 1 : 0);
$flags = ($flags << 4) | $message->opcode;
var_dump($flags);
$flags = ($flags << 1) | ($message->aa ? 1 : 0);
}
headerToBinary(new Message());
echo "PROBLEM NOT REPRODUCED !\n";
Expected result:
----------------
Starting...
int(0)
PROBLEM NOT REPRODUCED !
Actual result:
--------------
In release mode
---------------
Starting...
UNKNOWN:0
PHP Fatal error: Uncaught TypeError: Unsupported operand types: null << int in
/home/runner/work/php-8-jit-bug-1/php-8-jit-bug-1/reproduce.php:20
Stack trace:
#0 /home/runner/work/php-8-jit-bug-1/php-8-jit-bug-1/reproduce.php(23): headerToBinary()
#1 {main}
thrown in /home/runner/work/php-8-jit-bug-1/php-8-jit-bug-1/reproduce.php on line 20
In debug mode
-------------
Starting...
UNKNOWN:0
php: /tmp/php-build/source/8.0.2/Zend/zend_operators.c:345: zendi_try_get_long: Assertion `0'
failed.
Aborted (core dumped)
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=80745&edit=1