Messages in this thread | | | Date | Tue, 30 Nov 1999 08:09:40 -0500 | From | "Jim Nance" <> | Subject | Signal callstack question |
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Hello All, I am writting a little profiling tool which uses a timer to signal my process, and then, in the signal handler it walks the call stack to see where it is. My problem is that if I have a call stack like this:
main() -> f1() -> f2() -> f3()
and I get a signal while I am in f3(), when I walk the call stack it looks like this:
main() -> f1() -> f2() -> __restore -> signalHandler()
Since this is a profiler, it would really be nice to know that I am in the f3() function, but I can not figure out how to get this information. I took a look at __restore and it is a little bit of code that calls the sigrestore() system call. I assume that sigrestore() cleans up and puts f3() back onto the call stack. Does anyone know how I can figure out the name of the function that was executing when I caught the signal? The best I can come up with is to go back to f2() and try to disassemble the function call instruction, but I dont really like that approach (particularly since I don't know intel assembly).
Incidently, if a program longjmp()s out of a signal handler, and thus never calls sigrestore(), does this break anything (like queued signal delivery)?
Thanks,
Jim
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