Method and system for accomplishing observation point

Abstract

The invention provides a method and a system for realizing an observation point used in computer program debugging, wherein, the method includes the following steps: during the compile phase of a program, addressable position information of each variable of the program is generated through data flow analysis; during the debug phase of the program, the observation point of the program variables is realized according to the addressable position information of the program variables designated by a user. Optimizedly, a read access position set and a write access position set are generated from the DU chain or the UD chain of the program variables. Optimizedly, through setting break points at each access position of the read access position set and the write access position set, the implementation procedure sets the observation point through marking and binding the break points to the designated program variables; moreover, the observation point is triggered when the break points, which are marked to be bound to the designated program variables, are hit.

Description

technical field [0001] The present invention generally relates to the field of computers, in particular to computer program debugging technology, and more particularly to a method and system for realizing a watchpoint (watchpoint) used in computer program debugging. Background technique [0002] As we all know, debugging is an important stage in software development. In this stage, developers spend a lot of time and use various debugging methods and techniques to find the root cause of program failures and correct them. Watchpoint is the debugging process One of the key techniques used. Watchpoints are notifications presented to the debugger when specified portions of the debugged program's address space are accessed. Watchpoints "observe" an address range in the debugged program's memory space, and Triggered when any attempt to access the address range occurs, that is, the program being debugged is stopped. Developers use watchpoints to monitor access to specified variables...

AI Technical Summary

Problems solved by technology

[0010] advantage shortcoming hardware mechanism quick Can support read and write watchpoints non-universal, platform-dependent; Hardware resources are expensive and limited single step simulation Universal, platform independent slow, in some cases unbearably slow; Read watchpoints are not supported Changed paging mechanism medium speed High complexity, need to modify kernel

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