Status: New
Owner: [email protected]
Labels: Type-Defect Priority-Medium
New issue 296 by [email protected]: AsanThreadLocalMallocStorage is
unnecessarily large
http://code.google.com/p/address-sanitizer/issues/detail?id=296
AsanThreadLocalMallocStorage is declared as large flat buffer of uptrs.
It's then used as a placeholder for SizeClassAllocatorLocalCache.
The problem is that sizeof(SizeClassAllocatorLocalCache) is only 100K (26K
on 32-bit platforms) whereas sizeof(AsanThreadLocalMallocStorage) is 3M
(1.5M on 32-bit platforms).
This causes problems in apps with many "lightweight" threads. E.g. my app
has 250 threads with small 2M stacks so malloc storage with it's additional
1.5M per thread increase virtual memory consumption by 2x (from 500M to 1G).
I can cook a patch if all this sounds reasonable.
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