Bug #80435 mysys: Remove alloca() from lock-free allocator (contribution)

• Submitted: 18 Feb 2016 23:18
• Modified: 29 Mar 2016 6:37
• Reporter: OCA Admin (OCA)
• Status: Won't fix
• Category: MySQL Server: Locking
• Severity: S3 (Non-critical)
• OS: Any
• CPU Architecture: Any

[18 Feb 2016 23:18] OCA Admin

Description:
This bug tracks a contribution by Daniel Axtens (Github user: daxtens) as described in http://github.com/mysql/mysql-server/pull/54

How to repeat:
See description

Suggested fix:
See contribution code attached

[18 Feb 2016 23:18] OCA Admin

Contribution submitted via Github - mysys: Remove alloca() from lock-free allocator 
(*) Contribution by Daniel Axtens (Github daxtens, mysql-server/pull/54#issuecomment-185951752): I confirm the code being submitted is offered under the terms of the OCA, and that I am authorized to contribute it.

Contribution: git_patch_59733556.txt (text/plain), 6.75 KiB.

[25 Feb 2016 23:59] Stewart Smith

This should probably be higher than S3, maybe S1 considering that trying to allocate 252kB on the stack leads things to explode pretty hard.

[9 Mar 2016 9:45] MySQL Verification Team

Hello Daniel,

Thank you for the report and contribution.

Thanks,
Umesh

[9 Mar 2016 11:17] Ståle Deraas

Posted by developer:
 
Note that this code was removed in 5.7.6 by fix for http://bugs.mysql.com/bug.php?id=73979 .

[17 Mar 2016 8:47] Ståle Deraas

Posted by developer:
 
Closing, based on last comment.

[29 Mar 2016 22:17] Daniel Black

This was a crash (an assert), was hoping these fixes could still make it into 5.6.

Happy to consider/test a backport of bug 73979 too.