We have a big multi-threaded C++ application running on Linux. We see that occupied by the application memory grows fast and believe there are some leaks. We have tried every tool we have (valgrind, DynLeak, Purify) but did not find anything. Since this application can run on Windows, we have also tried Bounds Checker. Did not help, too.

We need a new tool that can help. I've looked at Google Perfomrance Tools, MMGR by Paul Nettle, MemCheck Deluxe. None of them impressed me. 

Is there anywhere a good tool for this task?