fixbps.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[] = "@(#)fixbps.c	8.1 (Berkeley) 6/6/93";
#endif /* not lint */

/*
 * fix up breakpoint information before continuing execution
 *
 * It's necessary to destroy breakpoints that were created temporarily
 * and still exist because the program terminated abnormally.
 */

#include "defs.h"
#include "breakpoint.h"
#include "bp.rep"

fixbps()
{
	register BPINFO *p, *last, *next;

	last = NIL;
	p = bphead;
	while (p != NIL) {
		next = p->bpnext;
		switch(p->bptype) {
			case ALL_OFF:
				if (p->bpline >= 0) {
					--tracing;
				} else {
					--inst_tracing;
				}
				if (p->bpcond != NIL) {
					delcond(TRPRINT, p->bpcond);
				}
				goto delete;

			case STOP_OFF:
				var_tracing--;
				delcond(TRSTOP, p->bpcond);
				goto delete;

			case TERM_OFF:
				--var_tracing;
				delvar(TRPRINT, p->bpnode, p->bpcond);
				goto delete;

			case CALL:
			case RETURN:
			case BLOCK_OFF:
			case CALLPROC:
			case END_BP:

			delete:
				if (last == NIL) {
					bphead = next;
				} else {
					last->bpnext = next;
				}
				dispose(p);
				break;

			default:
				last = p;
				break;
		}
		p = next;
	}
	tracing = 0;
	var_tracing = 0;
	inst_tracing = 0;
	trfree();
	condfree();
}