I looked into the problem and found that the memory allocation used malloc and free. I then defined macros for malloc and free in a common header to call my_malloc and my_free functions with the standard __FILE__ and __LINE__ macros passed in as parameters. Re-compiled the whole program with the macros, which redirected every call of malloc and free to my functions. My functions logged all the calls with the allocated memory pointer, the filename, and the line number. Once I collected enough log data from test runs, I sorted the lines in the log file by the memory pointer address. Every pointer address should come in pair, one from the malloc() and one from the free(). The odd number pointer addresses are the ones with missing free(). And I got their filename and line number right there.
