The breakpoint is defined as the way to stop the program counter at any point in the source code. Debuggers, if applied to assembly language programs, allow you to set breakpoints to obtain information about the state of memory and registers. This allows you to change the data in memory or gather information about the memory allocation, which will help you find a way to fix the error.
Patching is another assembly language programming technique in which a specific transition instruction is rewritten, or corrected, to go to the “patch” area within the program’s addressing space (domain). In this area, some auxiliary code is executed, after which the transition to the instruction following the corrected one is carried out. Usually this way of correcting errors is used in large programs implemented in assembly language, for example, Lotus 1-2-3.
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How can the mechanism for inserting breakpoints and patching be applied in modern software testing? The attractiveness of these technologies consists in the fact that they help to quickly locate, diagnose and correct errors, especially those that delay the implementation of a testing activity. Sometimes the tester discovers an error that prevents further testing in the area of this error’s existence. These are blocking errors. If this error is not corrected in the shortest time, this will cause the entire testing process to stop. For more than 95% of the errors reported to the development team so that to be corrected, it is perfectly acceptable to wait until the change control team determines the priority and schedules resources to eliminate each error. However, less than 5% of blocking errors require immediate action, the purpose of which is to determine the fast way to bypass blocked branches. The developer can provide a temporary way to fix a defective object with subsequent partial link changes to return this intermediate / modified version to testing personnel. This temporary fix will be re-implemented and tested in a future full version, but so far the testing team can maintain high efficiency in detection of other errors in the rest of the program, starting from the point of blocking error.
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