A method of grasping the execution states of program on mechanism for exchanging parts of executed program using dynamic linking

摘要

We have proposed the mechanism for exchanging parts of executed program. Exchanging is possible only when the program part is unused. Therefore the execution states of program must be grasped. In this paper, we suggest a method of grasping the execution states of program using dynamic linking. In this method, a program is divided into load segments at compile-time and every call/return between load segments is detected by dynamic linker at run-time. This method does not force programmers to change application codes for the state grasp. We found that the overhead of this method was about 1.1 micro seconds per each call/return between load segments.