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Program execution; General concepts; Code; Translation. Compiler. Compile time; Optimizing compiler; Intermediate representation (IR); Execution. Runtime system. Runtime
Names chosen to be meaningful in the context of the program can result in code that is more easily understood by a maintainer who is not the original author (or even by the original author after a period of time). [6] An example of an uninformatively named constant is int SIXTEEN = 16, while int NUMBER_OF_BITS = 16 is more descriptive.
Polyspace examines the source code to determine where potential run-time errors such as arithmetic overflow, buffer overrun, division by zero, and others could occur. Software developers and quality assurance managers use this information to identify which parts of the code are faulty or proven to be reliable.
The terminology runtime verification was formally introduced as the name of a 2001 workshop [2] aimed at addressing problems at the boundary between formal verification and testing. For large code bases, manually writing test cases turns out to be very time consuming. In addition, not all errors can be detected during development.
An example is explicit optimization of a code path which is considered a bottleneck by the profiler. In the case of Common Lisp , this is possible by using an explicit declaration to type-annotate a variable to a machine-size word (fixnum) [ 15 ] and lower the type safety level to zero [ 16 ] for a particular code block.
Invalid data or code has been accessed An operation is not allowed in the current ring or CPU mode A program attempts to divide by zero (only for integers; with the IEEE floating point standard, this creates an infinity instead).
However, dynamic compilation can still technically have compilation errors, [citation needed] although many programmers and sources may identify them as run-time errors. Most just-in-time compilers, such as the Javascript V8 engine, ambiguously refer to compilation errors as syntax errors since they check for them at run time. [1] [2]
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