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so you just want to override the malloc implementation ? glibc is specifically designed to allow that at runtime today. if you create a shared library that exports these functions: malloc calloc realloc memalign free you can use it with LD_PRELOAD and both glibc and your own code will use the custom allocator functions on the fly. then to switch back to the stock glibc ones, unset LD_PRELOAD. -mike
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