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Runtime system. Runtime; Executable; Interpreter; Virtual machine; Types of code; Source code; Object code; Bytecode; Machine code; Microcode; Compilation strategies; Ahead-of-time (AOT) Just-in-time (JIT) Tracing just-in-time; Compile and go system; Precompilation; Transcompilation; Recompilation; Notable runtimes; Android Runtime (ART) BEAM ...
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]
This creates static tables at compile time and link time that relate ranges of the program counter to the program state with respect to exception handling. [22] Then, if an exception is thrown, the runtime system looks up the current instruction location in the tables and determines what handlers are in play and what needs to be done.
Compile-time occurs before link time (when the output of one or more compiled files are joined) and runtime (when a program is executed). Although in the case of dynamic compilation , the final transformations into machine language happen at runtime.
Therefore, a runtime library is always specific to the platform and compiler. The runtime library may implement a portion of the runtime environment's behavior, but if one reads the code of the calls available, they are typically only thin wrappers that simply package information, and send it to the runtime environment or operating system.
Runtime, run time, or execution time is the final phase of a computer program ' s life cycle, in which the code is being executed on the computer's central processing unit (CPU) as machine code. In other words, "runtime" is the running phase of a program.
Type enforcement can be static, catching potential errors at compile time, or dynamic, associating type information with values at run-time and consulting them as needed to detect imminent errors, or a combination of both. [1] Dynamic type enforcement often allows programs to run that would be invalid under static enforcement.
The name comes from the compile time and runtime division from compiled languages, which similarly distinguishes the computer processes involved in the creation of a program (compilation) and its execution in the target machine (the runtime).