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abdb3ef2a4
Finding read-before-writes statically is quite difficult. In native we can use valgrind, but on boards without an MMU we are out of luck. x86 has an MMU, let's use it. If `-DDEBUG_READ_BEFORE_WRITE` was set, then pages on the heap get initialized upon first use. If the page was read before written, then a debug message with the virtual and physical address of the memory location is printed, as well as the address of the offending instruction.