Esteemed listers,
I have the situation that in the vast majority of cases the C program just
works fine, but in an infinitesimal small number of cases, it gets a S0C4
abend. I could perhaps, through intricate testing and comparing of lots of
things -- and burning huge amounts of CPU in doing so -- prevent the abend from
happening, but I would rather avoid the cost of that testing and instead
privilege the normal case.
So, I thought to use the signal() function to take control in those very few
cases where the abend occurs.
However...
signal or no signal, LE takes that CEEDUMP and the program stops, no matter
what.
What am I missing?
I reduced my program to bare minimum to prove the point. Here is the code:
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef __cplusplus
extern "C" void StrAbn(int);
#else
void StrAbn(int);
#endif
int main(int argc, char *argvݨ) {
printf("Setting abend handler\n");
if (signal(SIGABND, StrAbn) == SIG_ERR) {
perror("Could not signal user signal");
abort();
} else {
printf("Abend handler set\n");
}
printf("This must cause an abend\n");
strcpy(0,"Coucou");
printf("Continuing after abend\n");
return(0);
}
void StrAbn(int SIG_TYPE) {
printf("Trapped a vicious abend\n");
signal(SIG_TYPE, SIG_IGN);
printf("Exiting after the abend\n");
exit(0);
}
The output says:
Setting abend handler
Abend handler set
This must cause an abend
and it does cause an abend. But control does not come to my signal handling
routine. The "Trapped a vicious abend" never appears.
I have been reading up on LE condition handling and on the use of the signal()
function, and I have searched the archives of this very list. All to no avail.
For what it is worth: I do see the following LE options:
ABPERC(NONE)
ABTERMENC(ABEND)
DEBUG
POSIX(OFF)
NOTEST(ALL,"*","PROMPT","INSPPREF")
TRAP(ON,SPIE)
So, what do I need to do to actually trap that abend and get control back in my
program when it happens?
Any and all suggestions are welcome.
Thanks and very best regards,
Jantje.
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