[deliverable/linux.git] / tools / perf / util / trace-event-read.c

/*
 * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License (not later!)
 *
 * This program is distributed in the hope that 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <pthread.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>

#include "../perf.h"
#include "util.h"
#include "trace-event.h"

static int input_fd;

static ssize_t trace_data_size;
static bool repipe;

static int __do_read(int fd, void *buf, int size)
{
	int rsize = size;

	while (size) {
		int ret = read(fd, buf, size);

		if (ret <= 0)
			return -1;

		if (repipe) {
			int retw = write(STDOUT_FILENO, buf, ret);

			if (retw <= 0 || retw != ret) {
				pr_debug("repiping input file");
				return -1;
			}
		}

		size -= ret;
		buf += ret;
	}

	return rsize;
}

static int do_read(void *data, int size)
{
	int r;

	r = __do_read(input_fd, data, size);
	if (r <= 0) {
		pr_debug("reading input file (size expected=%d received=%d)",
			 size, r);
		return -1;
	}

	trace_data_size += r;

	return r;
}

/* If it fails, the next read will report it */
static void skip(int size)
{
	char buf[BUFSIZ];
	int r;

	while (size) {
		r = size > BUFSIZ ? BUFSIZ : size;
		do_read(buf, r);
		size -= r;
	};
}

static unsigned int read4(struct pevent *pevent)
{
	unsigned int data;

	if (do_read(&data, 4) < 0)
		return 0;
	return __data2host4(pevent, data);
}

static unsigned long long read8(struct pevent *pevent)
{
	unsigned long long data;

	if (do_read(&data, 8) < 0)
		return 0;
	return __data2host8(pevent, data);
}

static char *read_string(void)
{
	char buf[BUFSIZ];
	char *str = NULL;
	int size = 0;
	off_t r;
	char c;

	for (;;) {
		r = read(input_fd, &c, 1);
		if (r < 0) {
			pr_debug("reading input file");
			goto out;
		}

		if (!r) {
			pr_debug("no data");
			goto out;
		}

		if (repipe) {
			int retw = write(STDOUT_FILENO, &c, 1);

			if (retw <= 0 || retw != r) {
				pr_debug("repiping input file string");
				goto out;
			}
		}

		buf[size++] = c;

		if (!c)
			break;
	}

	trace_data_size += size;

	str = malloc(size);
	if (str)
		memcpy(str, buf, size);
out:
	return str;
}

static int read_proc_kallsyms(struct pevent *pevent)
{
	unsigned int size;
	char *buf;

	size = read4(pevent);
	if (!size)
		return 0;

	buf = malloc(size + 1);
	if (buf == NULL)
		return -1;

	if (do_read(buf, size) < 0) {
		free(buf);
		return -1;
	}
	buf[size] = '\0';

	parse_proc_kallsyms(pevent, buf, size);

	free(buf);
	return 0;
}

static int read_ftrace_printk(struct pevent *pevent)
{
	unsigned int size;
	char *buf;

	/* it can have 0 size */
	size = read4(pevent);
	if (!size)
		return 0;

	buf = malloc(size);
	if (buf == NULL)
		return -1;

	if (do_read(buf, size) < 0) {
		free(buf);
		return -1;
	}

	parse_ftrace_printk(pevent, buf, size);

	free(buf);
	return 0;
}

static int read_header_files(struct pevent *pevent)
{
	unsigned long long size;
	char *header_page;
	char buf[BUFSIZ];
	int ret = 0;

	if (do_read(buf, 12) < 0)
		return -1;

	if (memcmp(buf, "header_page", 12) != 0) {
		pr_debug("did not read header page");
		return -1;
	}

	size = read8(pevent);

	header_page = malloc(size);
	if (header_page == NULL)
		return -1;

	if (do_read(header_page, size) < 0) {
		pr_debug("did not read header page");
		free(header_page);
		return -1;
	}

	if (!pevent_parse_header_page(pevent, header_page, size,
				      pevent_get_long_size(pevent))) {
		/*
		 * The commit field in the page is of type long,
		 * use that instead, since it represents the kernel.
		 */
		pevent_set_long_size(pevent, pevent->header_page_size_size);
	}
	free(header_page);

	if (do_read(buf, 13) < 0)
		return -1;

	if (memcmp(buf, "header_event", 13) != 0) {
		pr_debug("did not read header event");
		return -1;
	}

	size = read8(pevent);
	skip(size);

	return ret;
}

static int read_ftrace_file(struct pevent *pevent, unsigned long long size)
{
	char *buf;

	buf = malloc(size);
	if (buf == NULL)
		return -1;

	if (do_read(buf, size) < 0) {
		free(buf);
		return -1;
	}

	parse_ftrace_file(pevent, buf, size);
	free(buf);
	return 0;
}

static int read_event_file(struct pevent *pevent, char *sys,
			    unsigned long long size)
{
	char *buf;

	buf = malloc(size);
	if (buf == NULL)
		return -1;

	if (do_read(buf, size) < 0) {
		free(buf);
		return -1;
	}

	parse_event_file(pevent, buf, size, sys);
	free(buf);
	return 0;
}

static int read_ftrace_files(struct pevent *pevent)
{
	unsigned long long size;
	int count;
	int i;
	int ret;

	count = read4(pevent);

	for (i = 0; i < count; i++) {
		size = read8(pevent);
		ret = read_ftrace_file(pevent, size);
		if (ret)
			return ret;
	}
	return 0;
}

static int read_event_files(struct pevent *pevent)
{
	unsigned long long size;
	char *sys;
	int systems;
	int count;
	int i,x;
	int ret;

	systems = read4(pevent);

	for (i = 0; i < systems; i++) {
		sys = read_string();
		if (sys == NULL)
			return -1;

		count = read4(pevent);

		for (x=0; x < count; x++) {
			size = read8(pevent);
			ret = read_event_file(pevent, sys, size);
			if (ret)
				return ret;
		}
	}
	return 0;
}

ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe)
{
	char buf[BUFSIZ];
	char test[] = { 23, 8, 68 };
	char *version;
	int show_version = 0;
	int show_funcs = 0;
	int show_printk = 0;
	ssize_t size = -1;
	int file_bigendian;
	int host_bigendian;
	int file_long_size;
	int file_page_size;
	struct pevent *pevent = NULL;
	int err;

	repipe = __repipe;
	input_fd = fd;

	if (do_read(buf, 3) < 0)
		return -1;
	if (memcmp(buf, test, 3) != 0) {
		pr_debug("no trace data in the file");
		return -1;
	}

	if (do_read(buf, 7) < 0)
		return -1;
	if (memcmp(buf, "tracing", 7) != 0) {
		pr_debug("not a trace file (missing 'tracing' tag)");
		return -1;
	}

	version = read_string();
	if (version == NULL)
		return -1;
	if (show_version)
		printf("version = %s\n", version);
	free(version);

	if (do_read(buf, 1) < 0)
		return -1;
	file_bigendian = buf[0];
	host_bigendian = bigendian();

	if (trace_event__init(tevent)) {
		pr_debug("trace_event__init failed");
		goto out;
	}

	pevent = tevent->pevent;

	pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
	pevent_set_file_bigendian(pevent, file_bigendian);
	pevent_set_host_bigendian(pevent, host_bigendian);

	if (do_read(buf, 1) < 0)
		goto out;
	file_long_size = buf[0];

	file_page_size = read4(pevent);
	if (!file_page_size)
		goto out;

	pevent_set_long_size(pevent, file_long_size);
	pevent_set_page_size(pevent, file_page_size);

	err = read_header_files(pevent);
	if (err)
		goto out;
	err = read_ftrace_files(pevent);
	if (err)
		goto out;
	err = read_event_files(pevent);
	if (err)
		goto out;
	err = read_proc_kallsyms(pevent);
	if (err)
		goto out;
	err = read_ftrace_printk(pevent);
	if (err)
		goto out;

	size = trace_data_size;
	repipe = false;

	if (show_funcs) {
		pevent_print_funcs(pevent);
	} else if (show_printk) {
		pevent_print_printk(pevent);
	}

	pevent = NULL;

out:
	if (pevent)
		trace_event__cleanup(tevent);
	return size;
}
Commit	Line	Data
538bafb5 SR	1	/*
	2	* Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
	3	*
	4	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; version 2 of the License (not later!)
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*
	19	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	20	*/
538bafb5 SR	21	#include <dirent.h>
	22	#include <stdio.h>
	23	#include <stdlib.h>
	24	#include <string.h>
	25	#include <getopt.h>
	26	#include <stdarg.h>
	27	#include <sys/types.h>
	28	#include <sys/stat.h>
	29	#include <sys/wait.h>
	30	#include <sys/mman.h>
	31	#include <pthread.h>
	32	#include <fcntl.h>
	33	#include <unistd.h>
538bafb5 SR	34	#include <errno.h>
538bafb5 SR	35
1ef2ed10	36	#include "../perf.h"
538bafb5 SR	37	#include "util.h"
	38	#include "trace-event.h"
	39
	40	static int input_fd;
	41
ebf3c675	42	static ssize_t trace_data_size;
454c407e	43	static bool repipe;
9215545e	44
4a31e565	45	static int __do_read(int fd, void *buf, int size)
9215545e TZ	46	{
	47	int rsize = size;
	48
	49	while (size) {
	50	int ret = read(fd, buf, size);
	51
	52	if (ret <= 0)
	53	return -1;
	54
454c407e TZ	55	if (repipe) {
	56	int retw = write(STDOUT_FILENO, buf, ret);
	57
4a31e565 NK	58	if (retw <= 0 \|\| retw != ret) {
	59	pr_debug("repiping input file");
	60	return -1;
	61	}
454c407e TZ	62	}
454c407e TZ	63
9215545e TZ	64	size -= ret;
	65	buf += ret;
	66	}
	67
	68	return rsize;
	69	}
	70
4a31e565	71	static int do_read(void *data, int size)
538bafb5 SR	72	{
	73	int r;
	74
4a31e565 NK	75	r = __do_read(input_fd, data, size);
	76	if (r <= 0) {
	77	pr_debug("reading input file (size expected=%d received=%d)",
	78	size, r);
	79	return -1;
	80	}
9215545e	81
ebf3c675	82	trace_data_size += r;
9215545e	83
538bafb5 SR	84	return r;
	85	}
	86
cbb5cf7f TZ	87	/* If it fails, the next read will report it */
	88	static void skip(int size)
	89	{
	90	char buf[BUFSIZ];
	91	int r;
	92
	93	while (size) {
	94	r = size > BUFSIZ ? BUFSIZ : size;
4a31e565	95	do_read(buf, r);
cbb5cf7f TZ	96	size -= r;
	97	};
	98	}
	99
da378962	100	static unsigned int read4(struct pevent *pevent)
538bafb5 SR	101	{
	102	unsigned int data;
	103
4a31e565 NK	104	if (do_read(&data, 4) < 0)
4a31e565 NK	105	return 0;
da378962	106	return __data2host4(pevent, data);
538bafb5 SR	107	}
538bafb5 SR	108
da378962	109	static unsigned long long read8(struct pevent *pevent)
538bafb5 SR	110	{
	111	unsigned long long data;
	112
4a31e565 NK	113	if (do_read(&data, 8) < 0)
4a31e565 NK	114	return 0;
da378962	115	return __data2host8(pevent, data);
538bafb5 SR	116	}
	117
	118	static char *read_string(void)
	119	{
	120	char buf[BUFSIZ];
	121	char *str = NULL;
	122	int size = 0;
f887f301	123	off_t r;
9215545e	124	char c;
538bafb5 SR	125
538bafb5 SR	126	for (;;) {
9215545e	127	r = read(input_fd, &c, 1);
452958fd NK	128	if (r < 0) {
	129	pr_debug("reading input file");
	130	goto out;
	131	}
538bafb5	132
452958fd NK	133	if (!r) {
	134	pr_debug("no data");
	135	goto out;
	136	}
538bafb5	137
454c407e TZ	138	if (repipe) {
	139	int retw = write(STDOUT_FILENO, &c, 1);
	140
452958fd NK	141	if (retw <= 0 \|\| retw != r) {
	142	pr_debug("repiping input file string");
	143	goto out;
	144	}
454c407e TZ	145	}
454c407e TZ	146
9215545e	147	buf[size++] = c;
538bafb5	148
9215545e TZ	149	if (!c)
9215545e TZ	150	break;
538bafb5 SR	151	}
538bafb5 SR	152
ebf3c675	153	trace_data_size += size;
9215545e	154
a4c98367 NK	155	str = malloc(size);
	156	if (str)
	157	memcpy(str, buf, size);
452958fd	158	out:
538bafb5 SR	159	return str;
	160	}
	161
a4c98367	162	static int read_proc_kallsyms(struct pevent *pevent)
538bafb5 SR	163	{
	164	unsigned int size;
	165	char *buf;
	166
da378962	167	size = read4(pevent);
538bafb5	168	if (!size)
a4c98367 NK	169	return 0;
	170
	171	buf = malloc(size + 1);
	172	if (buf == NULL)
	173	return -1;
538bafb5	174
4a31e565 NK	175	if (do_read(buf, size) < 0) {
	176	free(buf);
	177	return -1;
	178	}
7691b1ec	179	buf[size] = '\0';
538bafb5	180
da378962	181	parse_proc_kallsyms(pevent, buf, size);
538bafb5 SR	182
538bafb5 SR	183	free(buf);
a4c98367	184	return 0;
538bafb5 SR	185	}
538bafb5 SR	186
a4c98367	187	static int read_ftrace_printk(struct pevent *pevent)
538bafb5 SR	188	{
	189	unsigned int size;
	190	char *buf;
	191
4a31e565	192	/* it can have 0 size */
da378962	193	size = read4(pevent);
538bafb5	194	if (!size)
a4c98367 NK	195	return 0;
	196
	197	buf = malloc(size);
	198	if (buf == NULL)
	199	return -1;
538bafb5	200
4a31e565 NK	201	if (do_read(buf, size) < 0) {
	202	free(buf);
	203	return -1;
	204	}
538bafb5	205
da378962	206	parse_ftrace_printk(pevent, buf, size);
538bafb5 SR	207
538bafb5 SR	208	free(buf);
a4c98367	209	return 0;
538bafb5 SR	210	}
538bafb5 SR	211
a4c98367	212	static int read_header_files(struct pevent *pevent)
538bafb5 SR	213	{
538bafb5 SR	214	unsigned long long size;
94b4d89e	215	char *header_page;
538bafb5	216	char buf[BUFSIZ];
4a31e565	217	int ret = 0;
538bafb5	218
4a31e565 NK	219	if (do_read(buf, 12) < 0)
4a31e565 NK	220	return -1;
538bafb5	221
452958fd NK	222	if (memcmp(buf, "header_page", 12) != 0) {
	223	pr_debug("did not read header page");
	224	return -1;
	225	}
538bafb5	226
da378962	227	size = read8(pevent);
94b4d89e NK	228
	229	header_page = malloc(size);
	230	if (header_page == NULL)
	231	return -1;
	232
	233	if (do_read(header_page, size) < 0) {
	234	pr_debug("did not read header page");
	235	free(header_page);
	236	return -1;
	237	}
	238
	239	if (!pevent_parse_header_page(pevent, header_page, size,
	240	pevent_get_long_size(pevent))) {
	241	/*
	242	* The commit field in the page is of type long,
	243	* use that instead, since it represents the kernel.
	244	*/
	245	pevent_set_long_size(pevent, pevent->header_page_size_size);
	246	}
	247	free(header_page);
538bafb5	248
4a31e565 NK	249	if (do_read(buf, 13) < 0)
	250	return -1;
	251
452958fd NK	252	if (memcmp(buf, "header_event", 13) != 0) {
	253	pr_debug("did not read header event");
	254	return -1;
	255	}
538bafb5	256
da378962	257	size = read8(pevent);
2b2efc7f	258	skip(size);
4a31e565	259
4a31e565	260	return ret;
538bafb5 SR	261	}
538bafb5 SR	262
a4c98367	263	static int read_ftrace_file(struct pevent *pevent, unsigned long long size)
538bafb5 SR	264	{
	265	char *buf;
	266
a4c98367 NK	267	buf = malloc(size);
	268	if (buf == NULL)
	269	return -1;
	270
4a31e565 NK	271	if (do_read(buf, size) < 0) {
	272	free(buf);
	273	return -1;
	274	}
	275
da378962	276	parse_ftrace_file(pevent, buf, size);
538bafb5	277	free(buf);
a4c98367	278	return 0;
538bafb5 SR	279	}
538bafb5 SR	280
a4c98367	281	static int read_event_file(struct pevent pevent, char sys,
da378962	282	unsigned long long size)
538bafb5 SR	283	{
	284	char *buf;
	285
a4c98367 NK	286	buf = malloc(size);
	287	if (buf == NULL)
	288	return -1;
	289
4a31e565 NK	290	if (do_read(buf, size) < 0) {
	291	free(buf);
	292	return -1;
	293	}
	294
da378962	295	parse_event_file(pevent, buf, size, sys);
538bafb5	296	free(buf);
a4c98367	297	return 0;
538bafb5 SR	298	}
538bafb5 SR	299
a4c98367	300	static int read_ftrace_files(struct pevent *pevent)
538bafb5 SR	301	{
	302	unsigned long long size;
	303	int count;
	304	int i;
a4c98367	305	int ret;
538bafb5	306
da378962	307	count = read4(pevent);
538bafb5 SR	308
538bafb5 SR	309	for (i = 0; i < count; i++) {
da378962	310	size = read8(pevent);
a4c98367 NK	311	ret = read_ftrace_file(pevent, size);
	312	if (ret)
	313	return ret;
538bafb5	314	}
a4c98367	315	return 0;
538bafb5 SR	316	}
538bafb5 SR	317
a4c98367	318	static int read_event_files(struct pevent *pevent)
538bafb5 SR	319	{
	320	unsigned long long size;
	321	char *sys;
	322	int systems;
	323	int count;
	324	int i,x;
a4c98367	325	int ret;
538bafb5	326
da378962	327	systems = read4(pevent);
538bafb5 SR	328
	329	for (i = 0; i < systems; i++) {
	330	sys = read_string();
a4c98367 NK	331	if (sys == NULL)
a4c98367 NK	332	return -1;
538bafb5	333
da378962	334	count = read4(pevent);
4a31e565	335
538bafb5	336	for (x=0; x < count; x++) {
da378962	337	size = read8(pevent);
a4c98367 NK	338	ret = read_event_file(pevent, sys, size);
	339	if (ret)
	340	return ret;
538bafb5 SR	341	}
538bafb5 SR	342	}
a4c98367	343	return 0;
538bafb5 SR	344	}
538bafb5 SR	345
29f5ffd3	346	ssize_t trace_report(int fd, struct trace_event *tevent, bool __repipe)
538bafb5	347	{
538bafb5 SR	348	char buf[BUFSIZ];
	349	char test[] = { 23, 8, 68 };
	350	char *version;
d9340c1d	351	int show_version = 0;
538bafb5 SR	352	int show_funcs = 0;
538bafb5 SR	353	int show_printk = 0;
3dce2ce3	354	ssize_t size = -1;
63af28fa NK	355	int file_bigendian;
63af28fa NK	356	int host_bigendian;
59657f9c	357	int file_long_size;
30f36762	358	int file_page_size;
29f5ffd3	359	struct pevent *pevent = NULL;
a4c98367	360	int err;
3dce2ce3	361
454c407e	362	repipe = __repipe;
03456a15	363	input_fd = fd;
538bafb5	364
4a31e565 NK	365	if (do_read(buf, 3) < 0)
4a31e565 NK	366	return -1;
452958fd NK	367	if (memcmp(buf, test, 3) != 0) {
	368	pr_debug("no trace data in the file");
	369	return -1;
	370	}
538bafb5	371
4a31e565 NK	372	if (do_read(buf, 7) < 0)
4a31e565 NK	373	return -1;
452958fd NK	374	if (memcmp(buf, "tracing", 7) != 0) {
	375	pr_debug("not a trace file (missing 'tracing' tag)");
	376	return -1;
	377	}
538bafb5 SR	378
538bafb5 SR	379	version = read_string();
a4c98367 NK	380	if (version == NULL)
a4c98367 NK	381	return -1;
d9340c1d IM	382	if (show_version)
d9340c1d IM	383	printf("version = %s\n", version);
538bafb5 SR	384	free(version);
538bafb5 SR	385
4a31e565 NK	386	if (do_read(buf, 1) < 0)
4a31e565 NK	387	return -1;
538bafb5 SR	388	file_bigendian = buf[0];
	389	host_bigendian = bigendian();
	390
29f5ffd3 JO	391	if (trace_event__init(tevent)) {
29f5ffd3 JO	392	pr_debug("trace_event__init failed");
3dce2ce3 NK	393	goto out;
3dce2ce3 NK	394	}
aaf045f7	395
29f5ffd3 JO	396	pevent = tevent->pevent;
	397
	398	pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
	399	pevent_set_file_bigendian(pevent, file_bigendian);
	400	pevent_set_host_bigendian(pevent, host_bigendian);
	401
4a31e565 NK	402	if (do_read(buf, 1) < 0)
4a31e565 NK	403	goto out;
59657f9c	404	file_long_size = buf[0];
538bafb5	405
30f36762 NK	406	file_page_size = read4(pevent);
30f36762 NK	407	if (!file_page_size)
4a31e565	408	goto out;
538bafb5	409
59657f9c	410	pevent_set_long_size(pevent, file_long_size);
30f36762 NK	411	pevent_set_page_size(pevent, file_page_size);
30f36762 NK	412
a4c98367 NK	413	err = read_header_files(pevent);
	414	if (err)
	415	goto out;
	416	err = read_ftrace_files(pevent);
	417	if (err)
	418	goto out;
	419	err = read_event_files(pevent);
	420	if (err)
	421	goto out;
	422	err = read_proc_kallsyms(pevent);
	423	if (err)
	424	goto out;
	425	err = read_ftrace_printk(pevent);
	426	if (err)
	427	goto out;
538bafb5	428
ebf3c675	429	size = trace_data_size;
454c407e	430	repipe = false;
9215545e	431
538bafb5	432	if (show_funcs) {
3dce2ce3 NK	433	pevent_print_funcs(pevent);
	434	} else if (show_printk) {
	435	pevent_print_printk(pevent);
538bafb5 SR	436	}
538bafb5 SR	437
3dce2ce3 NK	438	pevent = NULL;
	439
	440	out:
	441	if (pevent)
29f5ffd3	442	trace_event__cleanup(tevent);
9215545e	443	return size;
538bafb5	444	}