[linux-2.6-block.git] / tools / perf / util / db-export.c

/*
 * db-export.c: Support for exporting data suitable for import to a database
 * Copyright (c) 2014, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 */

#include <errno.h>

#include "evsel.h"
#include "machine.h"
#include "thread.h"
#include "comm.h"
#include "symbol.h"
#include "event.h"
#include "util.h"
#include "thread-stack.h"
#include "db-export.h"

struct deferred_export {
	struct list_head node;
	struct comm *comm;
};

static int db_export__deferred(struct db_export *dbe)
{
	struct deferred_export *de;
	int err;

	while (!list_empty(&dbe->deferred)) {
		de = list_entry(dbe->deferred.next, struct deferred_export,
				node);
		err = dbe->export_comm(dbe, de->comm);
		list_del(&de->node);
		free(de);
		if (err)
			return err;
	}

	return 0;
}

static void db_export__free_deferred(struct db_export *dbe)
{
	struct deferred_export *de;

	while (!list_empty(&dbe->deferred)) {
		de = list_entry(dbe->deferred.next, struct deferred_export,
				node);
		list_del(&de->node);
		free(de);
	}
}

static int db_export__defer_comm(struct db_export *dbe, struct comm *comm)
{
	struct deferred_export *de;

	de = zalloc(sizeof(struct deferred_export));
	if (!de)
		return -ENOMEM;

	de->comm = comm;
	list_add_tail(&de->node, &dbe->deferred);

	return 0;
}

int db_export__init(struct db_export *dbe)
{
	memset(dbe, 0, sizeof(struct db_export));
	INIT_LIST_HEAD(&dbe->deferred);
	return 0;
}

int db_export__flush(struct db_export *dbe)
{
	return db_export__deferred(dbe);
}

void db_export__exit(struct db_export *dbe)
{
	db_export__free_deferred(dbe);
	call_return_processor__free(dbe->crp);
	dbe->crp = NULL;
}

int db_export__evsel(struct db_export *dbe, struct perf_evsel *evsel)
{
	if (evsel->db_id)
		return 0;

	evsel->db_id = ++dbe->evsel_last_db_id;

	if (dbe->export_evsel)
		return dbe->export_evsel(dbe, evsel);

	return 0;
}

int db_export__machine(struct db_export *dbe, struct machine *machine)
{
	if (machine->db_id)
		return 0;

	machine->db_id = ++dbe->machine_last_db_id;

	if (dbe->export_machine)
		return dbe->export_machine(dbe, machine);

	return 0;
}

int db_export__thread(struct db_export *dbe, struct thread *thread,
		      struct machine *machine, struct comm *comm)
{
	u64 main_thread_db_id = 0;
	int err;

	if (thread->db_id)
		return 0;

	thread->db_id = ++dbe->thread_last_db_id;

	if (thread->pid_ != -1) {
		struct thread *main_thread;

		if (thread->pid_ == thread->tid) {
			main_thread = thread;
		} else {
			main_thread = machine__findnew_thread(machine,
							      thread->pid_,
							      thread->pid_);
			if (!main_thread)
				return -ENOMEM;
			err = db_export__thread(dbe, main_thread, machine,
						comm);
			if (err)
				return err;
			if (comm) {
				err = db_export__comm_thread(dbe, comm, thread);
				if (err)
					return err;
			}
		}
		main_thread_db_id = main_thread->db_id;
	}

	if (dbe->export_thread)
		return dbe->export_thread(dbe, thread, main_thread_db_id,
					  machine);

	return 0;
}

int db_export__comm(struct db_export *dbe, struct comm *comm,
		    struct thread *main_thread)
{
	int err;

	if (comm->db_id)
		return 0;

	comm->db_id = ++dbe->comm_last_db_id;

	if (dbe->export_comm) {
		if (main_thread->comm_set)
			err = dbe->export_comm(dbe, comm);
		else
			err = db_export__defer_comm(dbe, comm);
		if (err)
			return err;
	}

	return db_export__comm_thread(dbe, comm, main_thread);
}

int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
			   struct thread *thread)
{
	u64 db_id;

	db_id = ++dbe->comm_thread_last_db_id;

	if (dbe->export_comm_thread)
		return dbe->export_comm_thread(dbe, db_id, comm, thread);

	return 0;
}

int db_export__dso(struct db_export *dbe, struct dso *dso,
		   struct machine *machine)
{
	if (dso->db_id)
		return 0;

	dso->db_id = ++dbe->dso_last_db_id;

	if (dbe->export_dso)
		return dbe->export_dso(dbe, dso, machine);

	return 0;
}

int db_export__symbol(struct db_export *dbe, struct symbol *sym,
		      struct dso *dso)
{
	u64 *sym_db_id = symbol__priv(sym);

	if (*sym_db_id)
		return 0;

	*sym_db_id = ++dbe->symbol_last_db_id;

	if (dbe->export_symbol)
		return dbe->export_symbol(dbe, sym, dso);

	return 0;
}

static struct thread *get_main_thread(struct machine *machine, struct thread *thread)
{
	if (thread->pid_ == thread->tid)
		return thread;

	if (thread->pid_ == -1)
		return NULL;

	return machine__find_thread(machine, thread->pid_, thread->pid_);
}

static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
			  u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
{
	int err;

	if (al->map) {
		struct dso *dso = al->map->dso;

		err = db_export__dso(dbe, dso, al->machine);
		if (err)
			return err;
		*dso_db_id = dso->db_id;

		if (!al->sym) {
			al->sym = symbol__new(al->addr, 0, 0, "unknown");
			if (al->sym)
				symbols__insert(&dso->symbols[al->map->type],
						al->sym);
		}

		if (al->sym) {
			u64 *db_id = symbol__priv(al->sym);

			err = db_export__symbol(dbe, al->sym, dso);
			if (err)
				return err;
			*sym_db_id = *db_id;
			*offset = al->addr - al->sym->start;
		}
	}

	return 0;
}

int db_export__branch_type(struct db_export *dbe, u32 branch_type,
			   const char *name)
{
	if (dbe->export_branch_type)
		return dbe->export_branch_type(dbe, branch_type, name);

	return 0;
}

int db_export__sample(struct db_export *dbe, union perf_event *event,
		      struct perf_sample *sample, struct perf_evsel *evsel,
		      struct thread *thread, struct addr_location *al)
{
	struct export_sample es = {
		.event = event,
		.sample = sample,
		.evsel = evsel,
		.thread = thread,
		.al = al,
	};
	struct thread *main_thread;
	struct comm *comm = NULL;
	int err;

	err = db_export__evsel(dbe, evsel);
	if (err)
		return err;

	err = db_export__machine(dbe, al->machine);
	if (err)
		return err;

	main_thread = get_main_thread(al->machine, thread);
	if (main_thread)
		comm = machine__thread_exec_comm(al->machine, main_thread);

	err = db_export__thread(dbe, thread, al->machine, comm);
	if (err)
		return err;

	if (comm) {
		err = db_export__comm(dbe, comm, main_thread);
		if (err)
			return err;
		es.comm_db_id = comm->db_id;
	}

	es.db_id = ++dbe->sample_last_db_id;

	err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
	if (err)
		return err;

	if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
	    sample_addr_correlates_sym(&evsel->attr)) {
		struct addr_location addr_al;

		perf_event__preprocess_sample_addr(event, sample, thread, &addr_al);
		err = db_ids_from_al(dbe, &addr_al, &es.addr_dso_db_id,
				     &es.addr_sym_db_id, &es.addr_offset);
		if (err)
			return err;
		if (dbe->crp) {
			err = thread_stack__process(thread, comm, sample, al,
						    &addr_al, es.db_id,
						    dbe->crp);
			if (err)
				return err;
		}
	}

	if (dbe->export_sample)
		return dbe->export_sample(dbe, &es);

	return 0;
}

static struct {
	u32 branch_type;
	const char *name;
} branch_types[] = {
	{0, "no branch"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
	{PERF_IP_FLAG_BRANCH, "unconditional jump"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT,
	 "software interrupt"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT,
	 "return from interrupt"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET,
	 "system call"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET,
	 "return from system call"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
	 PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"},
	{0, NULL}
};

int db_export__branch_types(struct db_export *dbe)
{
	int i, err = 0;

	for (i = 0; branch_types[i].name ; i++) {
		err = db_export__branch_type(dbe, branch_types[i].branch_type,
					     branch_types[i].name);
		if (err)
			break;
	}
	return err;
}

int db_export__call_path(struct db_export *dbe, struct call_path *cp)
{
	int err;

	if (cp->db_id)
		return 0;

	if (cp->parent) {
		err = db_export__call_path(dbe, cp->parent);
		if (err)
			return err;
	}

	cp->db_id = ++dbe->call_path_last_db_id;

	if (dbe->export_call_path)
		return dbe->export_call_path(dbe, cp);

	return 0;
}

int db_export__call_return(struct db_export *dbe, struct call_return *cr)
{
	int err;

	if (cr->db_id)
		return 0;

	err = db_export__call_path(dbe, cr->cp);
	if (err)
		return err;

	cr->db_id = ++dbe->call_return_last_db_id;

	if (dbe->export_call_return)
		return dbe->export_call_return(dbe, cr);

	return 0;
}
Commit	Line	Data
0db15b1e AH	1	/*
	2	* db-export.c: Support for exporting data suitable for import to a database
	3	* Copyright (c) 2014, Intel Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms and conditions of the GNU General Public License,
	7	* version 2, as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	*/
	15
	16	#include <errno.h>
	17
	18	#include "evsel.h"
	19	#include "machine.h"
	20	#include "thread.h"
	21	#include "comm.h"
	22	#include "symbol.h"
	23	#include "event.h"
758008b2	24	#include "util.h"
88f50d60	25	#include "thread-stack.h"
0db15b1e AH	26	#include "db-export.h"
0db15b1e AH	27
758008b2 AH	28	struct deferred_export {
	29	struct list_head node;
	30	struct comm *comm;
	31	};
	32
	33	static int db_export__deferred(struct db_export *dbe)
	34	{
	35	struct deferred_export *de;
	36	int err;
	37
	38	while (!list_empty(&dbe->deferred)) {
	39	de = list_entry(dbe->deferred.next, struct deferred_export,
	40	node);
	41	err = dbe->export_comm(dbe, de->comm);
	42	list_del(&de->node);
	43	free(de);
	44	if (err)
	45	return err;
	46	}
	47
	48	return 0;
	49	}
	50
	51	static void db_export__free_deferred(struct db_export *dbe)
	52	{
	53	struct deferred_export *de;
	54
	55	while (!list_empty(&dbe->deferred)) {
	56	de = list_entry(dbe->deferred.next, struct deferred_export,
	57	node);
	58	list_del(&de->node);
	59	free(de);
	60	}
	61	}
	62
	63	static int db_export__defer_comm(struct db_export dbe, struct comm comm)
	64	{
	65	struct deferred_export *de;
	66
	67	de = zalloc(sizeof(struct deferred_export));
	68	if (!de)
	69	return -ENOMEM;
	70
	71	de->comm = comm;
	72	list_add_tail(&de->node, &dbe->deferred);
	73
	74	return 0;
	75	}
	76
0db15b1e AH	77	int db_export__init(struct db_export *dbe)
	78	{
	79	memset(dbe, 0, sizeof(struct db_export));
758008b2	80	INIT_LIST_HEAD(&dbe->deferred);
0db15b1e AH	81	return 0;
	82	}
	83
758008b2 AH	84	int db_export__flush(struct db_export *dbe)
	85	{
	86	return db_export__deferred(dbe);
	87	}
	88
88f50d60	89	void db_export__exit(struct db_export *dbe)
0db15b1e	90	{
758008b2	91	db_export__free_deferred(dbe);
88f50d60 AH	92	call_return_processor__free(dbe->crp);
88f50d60 AH	93	dbe->crp = NULL;
0db15b1e AH	94	}
	95
	96	int db_export__evsel(struct db_export dbe, struct perf_evsel evsel)
	97	{
	98	if (evsel->db_id)
	99	return 0;
	100
	101	evsel->db_id = ++dbe->evsel_last_db_id;
	102
	103	if (dbe->export_evsel)
	104	return dbe->export_evsel(dbe, evsel);
	105
	106	return 0;
	107	}
	108
	109	int db_export__machine(struct db_export dbe, struct machine machine)
	110	{
	111	if (machine->db_id)
	112	return 0;
	113
	114	machine->db_id = ++dbe->machine_last_db_id;
	115
	116	if (dbe->export_machine)
	117	return dbe->export_machine(dbe, machine);
	118
	119	return 0;
	120	}
	121
	122	int db_export__thread(struct db_export dbe, struct thread thread,
	123	struct machine machine, struct comm comm)
	124	{
	125	u64 main_thread_db_id = 0;
	126	int err;
	127
	128	if (thread->db_id)
	129	return 0;
	130
	131	thread->db_id = ++dbe->thread_last_db_id;
	132
	133	if (thread->pid_ != -1) {
	134	struct thread *main_thread;
	135
	136	if (thread->pid_ == thread->tid) {
	137	main_thread = thread;
	138	} else {
	139	main_thread = machine__findnew_thread(machine,
	140	thread->pid_,
	141	thread->pid_);
	142	if (!main_thread)
	143	return -ENOMEM;
	144	err = db_export__thread(dbe, main_thread, machine,
	145	comm);
	146	if (err)
	147	return err;
	148	if (comm) {
	149	err = db_export__comm_thread(dbe, comm, thread);
	150	if (err)
	151	return err;
	152	}
	153	}
	154	main_thread_db_id = main_thread->db_id;
	155	}
	156
	157	if (dbe->export_thread)
158	return dbe->export_thread(dbe, thread, main_thread_db_id,
159	machine);
160
161	return 0;
162	}
163
164	int db_export__comm(struct db_export dbe, struct comm comm,
165	struct thread *main_thread)
166	{
167	int err;
168
169	if (comm->db_id)
170	return 0;
171
172	comm->db_id = ++dbe->comm_last_db_id;
173
174	if (dbe->export_comm) {
758008b2 AH	175	if (main_thread->comm_set)
	176	err = dbe->export_comm(dbe, comm);
	177	else
	178	err = db_export__defer_comm(dbe, comm);
0db15b1e AH	179	if (err)
	180	return err;
	181	}
	182
	183	return db_export__comm_thread(dbe, comm, main_thread);
	184	}
	185
	186	int db_export__comm_thread(struct db_export dbe, struct comm comm,
	187	struct thread *thread)
	188	{
	189	u64 db_id;
	190
	191	db_id = ++dbe->comm_thread_last_db_id;
	192
	193	if (dbe->export_comm_thread)
	194	return dbe->export_comm_thread(dbe, db_id, comm, thread);
	195
	196	return 0;
	197	}
	198
	199	int db_export__dso(struct db_export dbe, struct dso dso,
	200	struct machine *machine)
	201	{
	202	if (dso->db_id)
	203	return 0;
	204
	205	dso->db_id = ++dbe->dso_last_db_id;
	206
	207	if (dbe->export_dso)
	208	return dbe->export_dso(dbe, dso, machine);
	209
	210	return 0;
	211	}
	212
	213	int db_export__symbol(struct db_export dbe, struct symbol sym,
	214	struct dso *dso)
	215	{
	216	u64 *sym_db_id = symbol__priv(sym);
	217
	218	if (*sym_db_id)
	219	return 0;
	220
	221	*sym_db_id = ++dbe->symbol_last_db_id;
	222
	223	if (dbe->export_symbol)
	224	return dbe->export_symbol(dbe, sym, dso);
	225
	226	return 0;
	227	}
	228
	229	static struct thread get_main_thread(struct machine machine, struct thread *thread)
	230	{
	231	if (thread->pid_ == thread->tid)
	232	return thread;
	233
	234	if (thread->pid_ == -1)
	235	return NULL;
	236
	237	return machine__find_thread(machine, thread->pid_, thread->pid_);
	238	}
	239
	240	static int db_ids_from_al(struct db_export dbe, struct addr_location al,
	241	u64 dso_db_id, u64 sym_db_id, u64 *offset)
	242	{
243	int err;
244
245	if (al->map) {
246	struct dso *dso = al->map->dso;
247
248	err = db_export__dso(dbe, dso, al->machine);
249	if (err)
250	return err;
251	*dso_db_id = dso->db_id;
252
253	if (!al->sym) {
254	al->sym = symbol__new(al->addr, 0, 0, "unknown");
255	if (al->sym)
256	symbols__insert(&dso->symbols[al->map->type],
257	al->sym);
258	}
259
260	if (al->sym) {
261	u64 *db_id = symbol__priv(al->sym);
262
263	err = db_export__symbol(dbe, al->sym, dso);
264	if (err)
265	return err;
266	sym_db_id = db_id;
267	*offset = al->addr - al->sym->start;
268	}
269	}
270
271	return 0;
272	}
273
f2bff007 AH	274	int db_export__branch_type(struct db_export *dbe, u32 branch_type,
	275	const char *name)
	276	{
	277	if (dbe->export_branch_type)
	278	return dbe->export_branch_type(dbe, branch_type, name);
	279
	280	return 0;
	281	}
	282
0db15b1e AH	283	int db_export__sample(struct db_export dbe, union perf_event event,
	284	struct perf_sample sample, struct perf_evsel evsel,
	285	struct thread thread, struct addr_location al)
	286	{
	287	struct export_sample es = {
	288	.event = event,
	289	.sample = sample,
	290	.evsel = evsel,
	291	.thread = thread,
	292	.al = al,
	293	};
	294	struct thread *main_thread;
	295	struct comm *comm = NULL;
	296	int err;
	297
	298	err = db_export__evsel(dbe, evsel);
	299	if (err)
	300	return err;
	301
	302	err = db_export__machine(dbe, al->machine);
	303	if (err)
	304	return err;
	305
	306	main_thread = get_main_thread(al->machine, thread);
	307	if (main_thread)
	308	comm = machine__thread_exec_comm(al->machine, main_thread);
	309
	310	err = db_export__thread(dbe, thread, al->machine, comm);
	311	if (err)
	312	return err;
	313
	314	if (comm) {
	315	err = db_export__comm(dbe, comm, main_thread);
	316	if (err)
	317	return err;
	318	es.comm_db_id = comm->db_id;
	319	}
	320
	321	es.db_id = ++dbe->sample_last_db_id;
	322
	323	err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
	324	if (err)
	325	return err;
	326
	327	if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
	328	sample_addr_correlates_sym(&evsel->attr)) {
	329	struct addr_location addr_al;
	330
	331	perf_event__preprocess_sample_addr(event, sample, thread, &addr_al);
	332	err = db_ids_from_al(dbe, &addr_al, &es.addr_dso_db_id,
	333	&es.addr_sym_db_id, &es.addr_offset);
	334	if (err)
	335	return err;
88f50d60 AH	336	if (dbe->crp) {
	337	err = thread_stack__process(thread, comm, sample, al,
	338	&addr_al, es.db_id,
	339	dbe->crp);
	340	if (err)
	341	return err;
	342	}
0db15b1e AH	343	}
	344
	345	if (dbe->export_sample)
	346	return dbe->export_sample(dbe, &es);
	347
	348	return 0;
	349	}
f2bff007 AH	350
	351	static struct {
	352	u32 branch_type;
	353	const char *name;
	354	} branch_types[] = {
	355	{0, "no branch"},
	356	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_CALL, "call"},
	357	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_RETURN, "return"},
	358	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
	359	{PERF_IP_FLAG_BRANCH, "unconditional jump"},
	360	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_CALL \| PERF_IP_FLAG_INTERRUPT,
	361	"software interrupt"},
	362	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_RETURN \| PERF_IP_FLAG_INTERRUPT,
	363	"return from interrupt"},
	364	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_CALL \| PERF_IP_FLAG_SYSCALLRET,
	365	"system call"},
	366	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_RETURN \| PERF_IP_FLAG_SYSCALLRET,
	367	"return from system call"},
	368	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_ASYNC, "asynchronous branch"},
	369	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_CALL \| PERF_IP_FLAG_ASYNC \|
	370	PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
	371	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_TX_ABORT, "transaction abort"},
	372	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
	373	{PERF_IP_FLAG_BRANCH \| PERF_IP_FLAG_TRACE_END, "trace end"},
	374	{0, NULL}
	375	};
	376
	377	int db_export__branch_types(struct db_export *dbe)
	378	{
	379	int i, err = 0;
	380
	381	for (i = 0; branch_types[i].name ; i++) {
	382	err = db_export__branch_type(dbe, branch_types[i].branch_type,
	383	branch_types[i].name);
	384	if (err)
	385	break;
	386	}
	387	return err;
	388	}
88f50d60 AH	389
	390	int db_export__call_path(struct db_export dbe, struct call_path cp)
	391	{
	392	int err;
	393
	394	if (cp->db_id)
	395	return 0;
	396
	397	if (cp->parent) {
	398	err = db_export__call_path(dbe, cp->parent);
	399	if (err)
	400	return err;
	401	}
	402
	403	cp->db_id = ++dbe->call_path_last_db_id;
	404
	405	if (dbe->export_call_path)
	406	return dbe->export_call_path(dbe, cp);
	407
	408	return 0;
	409	}
	410
	411	int db_export__call_return(struct db_export dbe, struct call_return cr)
	412	{
	413	int err;
	414
	415	if (cr->db_id)
	416	return 0;
	417
	418	err = db_export__call_path(dbe, cr->cp);
	419	if (err)
	420	return err;
	421
	422	cr->db_id = ++dbe->call_return_last_db_id;
	423
	424	if (dbe->export_call_return)
	425	return dbe->export_call_return(dbe, cr);
	426
	427	return 0;
	428	}