xref: /freebsd-10-stable/lib/libdwarf/dwarf_finish.c

/*-
 * Copyright (c) 2007 John Birrell (jb@freebsd.org)
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $FreeBSD$
 */

#include <stdlib.h>
#include "_libdwarf.h"

int
dwarf_finish(Dwarf_Debug *dbgp, Dwarf_Error *error)
{
	Dwarf_Abbrev ab;
	Dwarf_Abbrev tab;
	Dwarf_Attribute at;
	Dwarf_Attribute tat;
	Dwarf_AttrValue av;
	Dwarf_AttrValue tav;
	Dwarf_CU cu;
	Dwarf_CU tcu;
	Dwarf_Debug dbg;
	Dwarf_Die die;
	Dwarf_Die tdie;

	if (error == NULL)
		/* Can only return a generic error. */
		return DWARF_E_ERROR;

	if (dbgp == NULL) {
		DWARF_SET_ERROR(error, DWARF_E_ARGUMENT);
		return DWARF_E_ERROR;
	}

	if ((dbg = *dbgp) == NULL)
		return DWARF_E_NONE;

	/* Free entries in the compilation unit list. */
	STAILQ_FOREACH_SAFE(cu, &dbg->dbg_cu, cu_next, tcu) {
		/* Free entries in the die list */
		STAILQ_FOREACH_SAFE(die, &cu->cu_die, die_next, tdie) {
			/* Free entries in the attribute value list */
			STAILQ_FOREACH_SAFE(av, &die->die_attrval, av_next, tav) {
				STAILQ_REMOVE(&die->die_attrval, av, _Dwarf_AttrValue, av_next);
				free(av);
			}

			STAILQ_REMOVE(&cu->cu_die, die, _Dwarf_Die, die_next);
			free(die);
		}

		/* Free entries in the abbrev list */
		STAILQ_FOREACH_SAFE(ab, &cu->cu_abbrev, a_next, tab) {
			/* Free entries in the attribute list */
			STAILQ_FOREACH_SAFE(at, &ab->a_attrib, at_next, tat) {
				STAILQ_REMOVE(&ab->a_attrib, at, _Dwarf_Attribute, at_next);
				free(at);
			}

			STAILQ_REMOVE(&cu->cu_abbrev, ab, _Dwarf_Abbrev, a_next);
			free(ab);
		}

		STAILQ_REMOVE(&dbg->dbg_cu, cu, _Dwarf_CU, cu_next);
		free(cu);
	}

	if (dbg->dbg_elf_close)
		/* Free resources associated with the ELF file. */
		elf_end(dbg->dbg_elf);

	free(dbg);

	*dbgp = NULL;

	return DWARF_E_NONE;
}