Application in Low and High Level Languages
Self-modification can be accomplished in a variety of ways depending upon the programming language and its support for pointers and/or access to dynamic compiler or interpreter 'engines':-
- overlay of existing instructions (or parts of instructions such as opcode, register, flags or address) or
- direct creation of whole instructions or sequences of instructions in memory
- creating or modification of source code statements followed by a 'mini compile' or a dynamic interpretation (see eval statement)
- creating an entire program dynamically and then executing it
Read more about this topic: Self-modifying Code
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