topic Re: Program is hanging intermittently in Operating System - HP-UX

Program is hanging intermittently

Sup — Mon, 22 Apr 2002 13:38:28 GMT

Hi,

Program is hanging intermittently on HP11.
Gdb output is pasted bekow.

(gdb) where
#0 0x1f5bb8 in mpy_float64 ()
#1 0xa6a3c in lxntrn ()
#2 0x85ed8 in upihmi ()
#3 0x1f5b98 in mpy_float64 ()
#4 0x30000 in check_Errors () at /utils/home/auto/Manager.c:1253

The line 1253 is sprintf

sprintf(Error,"%d in %d seconds.",Msg, interval );

Thanx

Re: Program is hanging intermittently

Duncan Edmonstone — Mon, 22 Apr 2002 14:08:57 GMT

odd that it hangs in a function relating to floating point... Its a long time since I programmed in C, but aren't %d conversion characters for displaying integers rather than floating points? what type of variables are Msg and interval?

HTH

Duncan

Re: Program is hanging intermittently

Sup — Mon, 22 Apr 2002 17:12:46 GMT

Hi,

Msg and interval are integer variables.

Thanx

Re: Program is hanging intermittently

A. Clay Stephenson — Mon, 22 Apr 2002 19:14:48 GMT

I would check the type and length of the variable 'Error'. Another possible cause, is that error is *char and points to a variable that has gone out of scope or was not allocated with enough space. If you have a memory overwrite problem, the actual cause could be far from this line of code and all you are seeing is an artifact of the actual bad code.

Re: Program is hanging intermittently

Deepak Extross — Tue, 23 Apr 2002 05:59:12 GMT

Hi,
1. Try printing out the value of strlen(Error), make sure it is at least 100 bytes.
2. Do a memset(Error, '\0' sizeof(Error)) before your sprintf to initialise it.
3. Does sprintf(Error, "%s", "This is a fixed string") work? If it does, then its probably an issue with the integer variables. In that case, try printing them one at a time to find out which is causing the problem.