ID:               40578
 Updated by:       [EMAIL PROTECTED]
 Reported By:      scottmacvicar at ntlworld dot com
 Status:           Closed
 Bug Type:         GD related
 Operating System: RHEL 4
 PHP Version:      5.2.1
 Assigned To:      tony2001
 New Comment:

Also backported to 4_4.


Previous Comments:
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[2007-02-21 18:24:27] scottmacvicar at ntlworld dot com

Any chance of having this backported to the PHP_4_4 branch? It's a
fairly minor patch to apply.

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[2007-02-21 15:42:02] [EMAIL PROTECTED]

I reported the issue in GD too:

http://bugs.libgd.org/?do=details&task_id=48

Will be fixed in 2.0.35.

Thanks for your patch and nice reproduce case!

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[2007-02-21 15:00:50] [EMAIL PROTECTED]

This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.

And again - very nice reproduce case & report, thanks.

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[2007-02-21 14:40:19] scottmacvicar at ntlworld dot com

Should probably class this as a crash.

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[2007-02-21 14:25:47] scottmacvicar at ntlworld dot com

Description:
------------
There appears to be a race condition with the truetype font support of
GD. I can see mutexes in the code for the font cache so there must be a
code path that's missed.

Backtrace:
http://public.vbulletin.com/bugs/php/gd_thread_safety-bt.txt

Reproduce code:
http://public.vbulletin.com/bugs/php/gd_thread_safety.phps
http://public.vbulletin.com/bugs/php/HECK.TTF

Command: ab -c 30 -n 10000
http://localhost/~scott/gd_thread_safety.php

Using Apache 2 with the Worker MPM.

Only patch applied to the build is a thread safety patch for
zend_strtod.c



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