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操作系统第三章笔记1
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Process
The Process
A process is a program in execution.
A program is a passive entity, such as a file containing a list of instructions stored on disk
A process is an active entity, with a program counterspecifying the next instruction to execute and
a set of associated resources
A program becomes a process when an executable file is loaded into memory.
Although two processes may be associated with the same program, they are nevertheless
considered two separate execution sequences
A process includes:
program code(text section)
program counter
contents of processor's register
proess stack (temporary data : return value ,parameters)
data section (global variables)
heap ( the memory that is dynamically allocated during process run time0)
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