MySQL Bugs: #84382: Add an option to randomize link order

Bug #84382	Add an option to randomize link order
Submitted:	2 Jan 2017 12:09	Modified:	9 Jan 2017 17:42
Reporter:	Steinar Gunderson	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Compiling	Severity:	S3 (Non-critical)
Version:	8.0.1	OS:	Any
Assigned to:		CPU Architecture:	Any

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Description:
We keep seeing spurious regressions that we believe are caused by lucky or unlucky alignment of code. We should implement a way to randomize the link order of functions, so that we can easier see whether these regressions are real or not.

How to repeat:
N/A

Suggested fix:
N/A

Posted by developer:
 
Noted in 8.0.1 changelog.

Two new CMake options are available for debugging. LINK_RANDOMIZE
indicates whether to randomize the order of symbols in the mysqld
binary (default OFF), and LINK_RANDOMIZE_SEED specifies a seed value
for LINK_RANDOMIZE.