Make CTMalloc use a LRU freelist for its partitions.

Make CTMalloc use a LRU freelist for its partitions.

This increases memory fragmentation, but also reduces the chance of memory aliasing occurring in a SyzyASan instrumented build.

BUG=
R=sebmarchand@chromium.org

Committed: https://code.google.com/p/sawbuck/source/detail?r=2225

[chrisha, 2014-08-04 16:31:11]

PTAL

[Sébastien Marchand, 2014-08-04 16:47:39]

lgtm, although I haven't reviewed in details the whole implementation this seems
ok. 

Should we put this behind a flag (at compile time or at runtime), it'd be good
to see the performance cost of doing this (and the impact on the quality of the
reports).

[chrisha, 2014-08-05 13:24:26]

I'll put it behind a compile time conditional so we can compare against the
original library behaviour.

[chrisha, 2014-08-05 13:46:00]

PTAL?

[Sébastien Marchand, 2014-08-05 14:01:33]

Nice, lgtm.

[chrisha, 2014-08-05 14:22:52]

Thanks, committing!

[chrisha, 2014-08-05 14:23:42]

Committed patchset #2 manually as 2225 (presubmit successful).