These controls are located here , together with the call stack , so that you can select the program or thread to control by clicking it in the call stack if you are debugging more than one program or instance of a program , or a program with multiple threads 由于这些控制按钮以及调用栈都在一个工具栏中,因此如果您要调试多个程序(或者一个程序的多个实例) ,或者调试多线程的程序,那么只需要在调用栈中单击相应的按钮,就可以随意选择要调试的程序或线程。
In the implementing of virtual machine , all p - instructions are encapsulated as classes . the virtual machine maintains the run - time environment , which is composed of code section , data section , function calling stack , operand stack , instruction pointer , etc . all that is good to the executing and the debugging of program 在虚拟机实现方面,将所有p -指令封装为类来实现;并用虚拟机维护由代码区、数据区、函数调用栈、操作数栈和指令计数器等共同构成的运行时环境,控制程序的执行,有利于实现调试功能。