Self-modifying code: Difference between revisions

Revision as of 23:05, 23 October 2003

Revision as of 03:45, 24 October 2003

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The kinds of self-modifying code that used in assembly, can be for various purpuses:

<1># Optimisation of a state dependant loop.

<2># runtimeRuntime code generation, or specialisation of an algorithm in runtime or loadtime (which is popular, for examplein the ___domain of real-time graphics).

<3># alterAltering of inlined state of an [[object (programming)|object]], simulating the high level construction of [[Closure (programming)|closures]].

<4># patchingPatching of subrouting address calling, as done usually at load time of [[DLL|dynamic libraries]]. Wherther this is regarded 'self-modifying code' or not is a case or terminology.

TypesThe <2>,<3>second and third types are proboably the kinds mostly used also in high-level languages, such as [[LISP]].

<2> runtime code generation, or specialisation of an algorithm in runtime or loadtime (which is popular, for examplein the ___domain of real-time graphics).

Pseudo-code example of type <1>:

<3> alter inlined state of an [[object (programming)|object]], simulating the high level construction of [[Closure (programming)|closures]].

<4> patching of subrouting address calling, as done usually at load time of [[DLL|dynamic libraries]]. Wherther this is regarded 'self-modifying code' or not is a case or terminology.

Types <2>,<3> are proboably the kinds mostly used also in high-level languages, such as [[LISP]].

Pseudo-code example of type <1>:

repeat N times {