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Bug #70749 try...catch with set_error_handler throttle all CPU cores overheat - freeze O/S
Submitted: 2015-10-20 06:48 UTC Modified: 2015-10-31 04:15 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:0 of 1 (0.0%)
From: ryan dot jentzsch at gmail dot com Assigned:
Status: Closed Package: Performance problem
PHP Version: 7.0.0RC5 OS: Linux Mint 17.2
Private report: No CVE-ID: None
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 [2015-10-20 06:48 UTC] ryan dot jentzsch at gmail dot com 
Description:
------------
PHP 7 RC5
If I run the referenced script using PHP 5.6.14 there are no problems.
Running this using the PHP 7 engine however results in a number of very bad things:

- My laptop fans go crazy.
- My 4 core CPUs are maxed.
- My laptop starts to overheat.
- The O/S either freezes or the kernel panics.

Linux Mint 17.2
Intel 64-bit

Test script:
---------------
Script to produce problem.
https://www.dropbox.com/s/uqmccqm9ts0xgrd/test.php?dl=0

Configuration:
https://www.dropbox.com/s/jguszkigzxnce47/config.txt?dl=0

Expected result:
----------------
In PHP 5.6.14 I see this (I would expect the same from PHP 7):
Caught exception: YOLO
Process finished with exit code 0


Actual result:
--------------
- My laptop fans go crazy.
- My 4 core CPUs are maxed.
- My laptop starts to overheat.
- The O/S either freezes or the kernel panics.

Patches

Pull Requests

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 [2015-10-21 10:43 UTC] ab@php.net
-Status: Open +Status: Feedback
 [2015-10-21 10:43 UTC] ab@php.net 
Do you have xdebug, uopz or other similar extension activated? If so, please try to deactiate it and retry the script.

Thanks.
 [2015-10-22 18:00 UTC] ryan dot jentzsch at gmail dot com
-Status: Feedback +Status: Closed
 [2015-10-22 18:00 UTC] ryan dot jentzsch at gmail dot com 
appears to be an XDEBUG issue. 
Closing.
 [2015-10-22 18:13 UTC] derick@php.net
-Status: Closed +Status: Re-Opened
 [2015-10-22 18:13 UTC] derick@php.net 
Actually, it could be: http://thread.gmane.org/gmane.comp.php.devel/101724 -- would you mind testing with the latest of the PHP-7.0 branch of GitHub?
 [2015-10-27 02:11 UTC] laruence@php.net
-Status: Re-Opened +Status: Feedback
 [2015-10-27 08:05 UTC] ryan dot jentzsch at gmail dot com 
I am the OP. I plan on trying this again when RC6 is released. Hopefully this will be fixed in that release.
 [2015-10-31 04:15 UTC] ryan dot jentzsch at gmail dot com
-Status: Feedback +Status: Closed
 [2015-10-31 04:15 UTC] ryan dot jentzsch at gmail dot com 
The sample script no longer maxes out my laptop CPU and now behaves as expected with the 7.0.0RC6 release. Closing.
 
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