[comp.lang.c++] In signal handler what was IP?

s_johnson@csc32.enet.dec.com (Scott Johnson) (05/11/91)

Hi,

I have another question.  Is there any way to figure out what creates an illegal
instruction error?  I try to trap it with a signal handler but sometimes it just
does not go there.

In my application it will hang and I want to know where the hang is occurring
and find out if it is consistent.  The main body of the program loops 100 times.
Sometimes it will loop 10 times before it hangs and other times it will loop 50
times before it hangs.  50% of the time it will go into my signal handler and
the sigtype indicates the signal was SIGILL.  Is there any way I can look at
what the IP is before the error occurred?  I know it has to be store somewhere.

I am running MS-DOS 3.3 with TC++ 1.01 on a 386sx machine.

Thanks for any and all replies.

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        Scott Johnson
        Digital Equipment Corporation
        Colorado Springs, Co