printnews.c

早期freebsd实现

/*-
 * Copyright (c) 1980, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)printnews.c	8.1 (Berkeley) 6/6/93";
#endif /* not lint */

/*
 * Print out news during single step tracing.
 *
 * We have to handle all the single stepping possibilities,
 * including combinations.  A combination of single stepping
 * by line and by instruction causes "curline" to be 0 but
 * "ss_lines" to be TRUE.  We avoid trying to print lines in this case.
 */

#include "defs.h"
#include "breakpoint.h"
#include "sym.h"
#include "source.h"
#include "object.h"
#include "mappings.h"
#include "machine.h"

printnews()
{
    if (ss_variables) {
	prvarnews();
    }
    if (trcond()) {
	if (ss_lines && curline > 0) {
	    skimsource(srcfilename(pc));
	    printf("trace:  ");
	    printlines(curline, curline);
	}
	if (ss_instructions) {
	    printf("inst trace: ");
	    printinst(pc, pc);
	}
    }
    bpact();
    if (stopcond()) {
	isstopped = TRUE;
	curline = srcline(pc);
	printstatus();
    }
}