Re: [Boost-bugs] [Boost C++ Libraries] #4960: boost::pool_allocator for vector of vectors exhausts memory

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #4960: boost::pool_allocator for vector of vectors exhausts memory
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-02-15 18:34:04

#4960: boost::pool_allocator for vector of vectors exhausts memory
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  Reporter:  mattiasg                 |       Owner:  cnewbold
      Type:  Bugs                     |      Status:  new     
 Milestone:  To Be Determined         |   Component:  pool    
   Version:  Boost Development Trunk  |    Severity:  Problem 
Resolution:                           |    Keywords:          
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Comment (by johnmaddock):

 Update:

 This is a result of two bugs:

 1) std::vector invokes undefined behaviour by calling
 Allocator::allocate(0).  This has been fixed in more recent GCC versions.
 2) Boost.Pool, when it tries to allocate 0 chunks thinks allocation has
 failed (a bug), so allocates a whole new block, *and* ups the size of the
 next block to allocate by a factor of 2.  So just a few allocation
 requests for 0 chunks blows up the heap.

 This will be fixed in the sandbox version of Boost.Pool soon.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/4960#comment:7>
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