Comment #2 on issue 292 by [email protected]: Shadow memory has big footprint of large virtual memory.
http://code.google.com/p/address-sanitizer/issues/detail?id=292

This footprint also exist with stack,
if the max stack size of per thread is 10mb,
then the footprint of per thread is 1.25mb.

This may be thread context created by ASan (it's ~2.5mb on i686). Kernel sometimes merges it into memory region that was used for thread stack (because attributes are compatible).

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