Avoiding signals when tracing user processes

Details Avoiding signals when tracing user processes Avoiding signals when tracing user processes

2005-10-24

2010-06-08

Zhen, Wei Y (Department: 2191)

Data processing: software development, installation, and managem

Software program development tool

Testing or debugging

C717S127000

Reexamination Certificate

active

07735067

ABSTRACT:
A method for tracing an instrumented program, including triggering a probe in the instrumented program, obtaining an original instruction associated with the probe, loading the original instruction into a scratch space, beginning execution of the original instruction in the scratch space using a thread, detecting a state of a signal received by a signal handler, and if the signal is asynchronous, executing a second instruction corresponding to the signal after executing the original instruction, and if the signal is synchronous, executing a third instruction corresponding to the signal and resetting a program counter to a location of the original instruction where the probe in the instrumented program was triggered.

REFERENCES:
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patent: 6698011 (2004-02-01), Reinders et al.
patent: 7065750 (2006-06-01), Babaian et al.
patent: 7516453 (2009-04-01), Bugnion
Ariel Tamches, “Fine-Grained Dynamic Instrumentation of Commodity Operating System Kernels”, 2001, pp. 49-69.
Richard J. Moore, et al., “IBM Dynamic Probes”, http://www-124.ibm.com/developerworks/opensource/linux/projects/dprobes/README, 2000, 4 pages.

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