mirror of
https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-22 18:19:42 +00:00
cd632ad31d
This implements node reference tracing that passes all the internal
layers from dns_db API (and friends) to increment_reference() and
decrement_reference().
It can be enabled by #defining DNS_DB_NODETRACE in <dns/trace.h> header.
The output then looks like this:
incr:node:check_address_records:rootns.c:409:0x7f67f5a55a40->references = 1
decr:node:check_address_records:rootns.c:449:0x7f67f5a55a40->references = 0
incr:nodelock:check_address_records:rootns.c:409:0x7f67f5a55a40:0x7f68304d7040->references = 1
decr:nodelock:check_address_records:rootns.c:449:0x7f67f5a55a40:0x7f68304d7040->references = 0
There's associated python script to find the missing detach located at:
https://gitlab.isc.org/isc-projects/bind9/-/snippets/1038
131 lines
3.0 KiB
C
131 lines
3.0 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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/*! \file */
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#include <stdbool.h>
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#include <isc/util.h>
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#include <dns/dbiterator.h>
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#include <dns/name.h>
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void
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dns__dbiterator_destroy(dns_dbiterator_t **iteratorp DNS__DB_FLARG) {
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/*
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* Destroy '*iteratorp'.
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*/
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REQUIRE(iteratorp != NULL);
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REQUIRE(DNS_DBITERATOR_VALID(*iteratorp));
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(*iteratorp)->methods->destroy(iteratorp DNS__DB_FLARG_PASS);
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ENSURE(*iteratorp == NULL);
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}
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isc_result_t
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dns__dbiterator_first(dns_dbiterator_t *iterator DNS__DB_FLARG) {
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/*
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* Move the node cursor to the first node in the database (if any).
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*/
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REQUIRE(DNS_DBITERATOR_VALID(iterator));
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return (iterator->methods->first(iterator DNS__DB_FLARG_PASS));
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}
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isc_result_t
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dns__dbiterator_last(dns_dbiterator_t *iterator DNS__DB_FLARG) {
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/*
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* Move the node cursor to the first node in the database (if any).
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*/
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REQUIRE(DNS_DBITERATOR_VALID(iterator));
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return (iterator->methods->last(iterator DNS__DB_FLARG_PASS));
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}
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isc_result_t
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dns__dbiterator_seek(dns_dbiterator_t *iterator,
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const dns_name_t *name DNS__DB_FLARG) {
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/*
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* Move the node cursor to the node with name 'name'.
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*/
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REQUIRE(DNS_DBITERATOR_VALID(iterator));
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return (iterator->methods->seek(iterator, name DNS__DB_FLARG_PASS));
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}
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isc_result_t
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dns__dbiterator_prev(dns_dbiterator_t *iterator DNS__DB_FLARG) {
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/*
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* Move the node cursor to the previous node in the database (if any).
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*/
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REQUIRE(DNS_DBITERATOR_VALID(iterator));
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return (iterator->methods->prev(iterator DNS__DB_FLARG_PASS));
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}
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isc_result_t
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dns__dbiterator_next(dns_dbiterator_t *iterator DNS__DB_FLARG) {
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/*
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* Move the node cursor to the next node in the database (if any).
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*/
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REQUIRE(DNS_DBITERATOR_VALID(iterator));
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return (iterator->methods->next(iterator DNS__DB_FLARG_PASS));
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}
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isc_result_t
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dns__dbiterator_current(dns_dbiterator_t *iterator, dns_dbnode_t **nodep,
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dns_name_t *name DNS__DB_FLARG) {
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/*
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* Return the current node.
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*/
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REQUIRE(DNS_DBITERATOR_VALID(iterator));
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REQUIRE(nodep != NULL && *nodep == NULL);
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REQUIRE(name == NULL || dns_name_hasbuffer(name));
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return (iterator->methods->current(iterator, nodep,
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name DNS__DB_FLARG_PASS));
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}
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isc_result_t
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dns_dbiterator_pause(dns_dbiterator_t *iterator) {
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/*
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* Pause iteration.
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*/
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REQUIRE(DNS_DBITERATOR_VALID(iterator));
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return (iterator->methods->pause(iterator));
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}
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isc_result_t
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dns_dbiterator_origin(dns_dbiterator_t *iterator, dns_name_t *name) {
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/*
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* Return the origin to which returned node names are relative.
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*/
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REQUIRE(DNS_DBITERATOR_VALID(iterator));
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REQUIRE(iterator->relative_names);
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REQUIRE(dns_name_hasbuffer(name));
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return (iterator->methods->origin(iterator, name));
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}
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