From: danco@pebble.org
Sent: Monday, February 11, 2002 10:24 AM
To: Info-VAX@Mvb.Saic.Com
Subject: Re: Am I being debugged?

In article <1013433357.9395.0.nnrp-07.9e989e7e@news.demon.co.uk>,
Chris Sharman wrote:

>> > Small question: how can my (C today, but tomorrow will be different)
>> > program tell if it is being run in debug mode?

Perhaps something like this may work for you?
You get the idea anyway.

int32 is_debug_active(void)
{
    typedef struct
    {
	int32    kernel_primary;
	int32    kernel_secondary;
	int32    exec_primary;
	int32    exec_secondary;
	int32    super_primary;
	int32    super_secondary;
	int32	 user_primary;
	int32    user_secondary;
    } EXCVEC;
    
    ITEM_LIST_3 itmlst[2];
    EXCVEC      *excvec;
    uint16      len;
	   
    itmlst[0].buflen = 4;
    itmlst[0].code = JPI$_EXCVEC;
    itmlst[0].bufadr = (int8*) &excvec;
    itmlst[0].retlenadr = &len;
    itmlst[1].buflen = 0;
    itmlst[1].code = 0;
    itmlst[1].bufadr = NULL;
    itmlst[1].retlenadr = NULL;
					   
    sys$getjpiw(0, 0, 0, itmlst, 0, 0, 0);
    return (excvec->user_primary != NULL);
}

- Dan