Compile Time 和 Execution Time 地址绑定的区别

先决条件 – 地址绑定方法

地址绑定是程序指令和数据与实际物理内存位置的关联。操作系统中有多种类型的地址绑定。

地址绑定有 3 种类型：

1. 编译时地址绑定
2. 加载时间地址绑定
3. 执行时地址绑定

在这里，我们比较编译时间和执行时间地址绑定如下。

编译时地址绑定：
如果编译器负责执行地址绑定，那么它被称为编译时地址绑定。这种类型的地址绑定将在将程序加载到内存之前完成。编译器需要与操作系统内存管理器交互以执行编译时地址绑定。

执行时间或动态地址绑定：
即使将程序加载到内存中，地址绑定也会被推迟。程序将不断更改内存中的位置，直到程序执行为止。这种类型的地址绑定将由处理器在程序执行时完成。

Compile Time 和 Execution Time 地址绑定的区别：

Compile Time Address Binding	Execution Time Address Binding
Compiler is responsible for the compile time address binding.	Execution time address binding is done by processor.
It generates logical address (virtual address).	It generates dynamic absolute address.
Compile time address binding is done before loading the program into memory.	Execution time address binding is done at the time of program execution.
Instructions are translated into absolute address.	It helps in execution.
Code is compiled here.	From memory instructions are executed by CPU.
It works with logical address.	It works with dynamic absolute address.
It is static address binding.	It is dynamic address binding.
Compiler interacts with operating system memory manager to perform it.	It is done by processor at the time of program execution.