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Code-block reordering Code-block reordering alters the order of the basic blocks in a program to reduce conditional branches and improve the locality of reference. Dead-code elimination Removes instructions that will not affect the behaviour of the program, for example, definitions that have no uses, called dead code. This reduces code size and ...
Self-modifying code is quite straightforward to implement when using assembly language.Instructions can be dynamically created in memory (or else overlaid over existing code in non-protected program storage), [1] in a sequence equivalent to the ones that a standard compiler may generate as the object code.
The Intel 8086 and subsequent processors in the x86 series have an HLT (halt) instruction, opcode F4, which stops instruction execution and places the processor in a HALT state. An enabled interrupt, a debug exception, the BINIT signal, the INIT signal, or the RESET signal resumes execution, which means the processor can always be restarted. [15]
In computing, Dynamic Data Exchange (DDE) is a technology for interprocess communication used in early versions of Microsoft Windows and OS/2.DDE allows programs to manipulate objects provided by other programs, and respond to user actions affecting those objects.
This makes part of the data structure into a ring, causing naive code to loop forever. While most infinite loops can be found by close inspection of the code, there is no general method to determine whether a given program will ever halt or will run forever; this is the undecidability of the halting problem. [8]
Specifically, a for-loop functions by running a section of code repeatedly until a certain condition has been satisfied. For-loops have two parts: a header and a body. The header defines the iteration and the body is the code executed once per iteration. The header often declares an explicit loop counter or loop variable. This allows the body ...
In many languages, only the matching block is executed, and then execution continues at the end of the switch statement. These include the Pascal family (Object Pascal, Modula, Oberon, Ada, etc.) as well as PL/I, modern forms of Fortran and BASIC dialects influenced by Pascal, most functional languages, and many others.
The taskkill command on Microsoft Windows. In Microsoft's command-line interpreter Windows PowerShell, kill is a predefined command alias for the Stop-Process cmdlet. Microsoft Windows XP, Vista and 7 include the command taskkill [5] to terminate processes. The usual syntax for this command is taskkill /im "IMAGENAME".