Malloc problem

Leon Pollak leonp at
Thu Oct 22 17:11:26 UTC 2009

Hello, all.

My 4.8.0 based rather big application at some (rather deep) point attempts to 
allocate two 8-byte chunks of memory, one after another (operator 'new' in 
C++). This is some 10001-th malloc done....:-)

To my greatest possible surprise I see that both pointers receive the same 
address! (I am far from being out of memory).

Tracing with the debugger, I see that 
- _Heap_Block_allocate allocates the same address all the time I call it;
- 'the_heap' content remains the same except the stats structure; 
- stats->free_blocks crosses the zero value and becomes negative(?!). Also 
some 2-3 other counters in stats change.

As I do not believe that this libcsupport code does not work, I search for my 
error, but I am totally disoriented where to look for, as the first malloc (of 
these two) works fine....

So, any hint about where to look will be highly appreciated...

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