[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / tools / perf / builtin-probe.c

/*
 * builtin-probe.c
 *
 * Builtin probe command: Set up probe events by C expression
 *
 * Written by Masami Hiramatsu <mhiramat@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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 */
#define _GNU_SOURCE
#include <sys/utsname.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

#undef _GNU_SOURCE
#include "perf.h"
#include "builtin.h"
#include "util/util.h"
#include "util/parse-options.h"
#include "util/parse-events.h"	/* For debugfs_path */
#include "util/probe-finder.h"

/* Default vmlinux search paths */
#define NR_SEARCH_PATH 3
const char *default_search_path[NR_SEARCH_PATH] = {
"/lib/modules/%s/build/vmlinux",		/* Custom build kernel */
"/usr/lib/debug/lib/modules/%s/vmlinux",	/* Red Hat debuginfo */
"/boot/vmlinux-debug-%s",			/* Ubuntu */
};

#define MAX_PATH_LEN 256
#define MAX_PROBES 128
#define MAX_PROBE_ARGS 128

/* Session management structure */
static struct {
	char *vmlinux;
	char *release;
	int need_dwarf;
	int nr_probe;
	struct probe_point probes[MAX_PROBES];
	char *events[MAX_PROBES];
} session;

#define semantic_error(msg ...) die("Semantic error :" msg)

static int parse_probepoint(const struct option *opt __used,
			    const char *str, int unset __used)
{
	char *argv[MAX_PROBE_ARGS + 2];	/* Event + probe + args */
	int argc, i;
	char *arg, *ptr;
	struct probe_point *pp = &session.probes[session.nr_probe];
	char **event = &session.events[session.nr_probe];
	int retp = 0;

	if (!str)	/* The end of probe points */
		return 0;

	debug("Probe-define(%d): %s\n", session.nr_probe, str);
	if (++session.nr_probe == MAX_PROBES)
		semantic_error("Too many probes");

	/* Separate arguments, similar to argv_split */
	argc = 0;
	do {
		/* Skip separators */
		while (isspace(*str))
			str++;

		/* Add an argument */
		if (*str != '\0') {
			const char *s = str;

			/* Skip the argument */
			while (!isspace(*str) && *str != '\0')
				str++;

			/* Duplicate the argument */
			argv[argc] = strndup(s, str - s);
			if (argv[argc] == NULL)
				die("strndup");
			if (++argc == MAX_PROBE_ARGS)
				semantic_error("Too many arguments");
			debug("argv[%d]=%s\n", argc, argv[argc - 1]);
		}
	} while (*str != '\0');
	if (argc < 2)
		semantic_error("Need event-name and probe-point at least.");

	/* Parse the event name */
	if (argv[0][0] == 'r')
		retp = 1;
	else if (argv[0][0] != 'p')
		semantic_error("You must specify 'p'(kprobe) or"
				" 'r'(kretprobe) first.");
	/* TODO: check event name */
	*event = argv[0];

	/* Parse probe point */
	arg = argv[1];
	if (arg[0] == '@') {
		/* Source Line */
		arg++;
		ptr = strchr(arg, ':');
		if (!ptr || !isdigit(ptr[1]))
			semantic_error("Line number is required.");
		*ptr++ = '\0';
		if (strlen(arg) == 0)
			semantic_error("No file name.");
		pp->file = strdup(arg);
		pp->line = atoi(ptr);
		if (!pp->file || !pp->line)
			semantic_error("Failed to parse line.");
		debug("file:%s line:%d\n", pp->file, pp->line);
	} else {
		/* Function name */
		ptr = strchr(arg, '+');
		if (ptr) {
			if (!isdigit(ptr[1]))
				semantic_error("Offset is required.");
			*ptr++ = '\0';
			pp->offset = atoi(ptr);
		} else
			ptr = arg;
		ptr = strchr(ptr, '@');
		if (ptr) {
			*ptr++ = '\0';
			pp->file = strdup(ptr);
		}
		pp->function = strdup(arg);
		debug("symbol:%s file:%s offset:%d\n",
		      pp->function, pp->file, pp->offset);
	}
	free(argv[1]);
	if (pp->file)
		session.need_dwarf = 1;

	/* Copy arguments */
	pp->nr_args = argc - 2;
	if (pp->nr_args > 0) {
		pp->args = (char **)malloc(sizeof(char *) * pp->nr_args);
		if (!pp->args)
			die("malloc");
		memcpy(pp->args, &argv[2], sizeof(char *) * pp->nr_args);
	}

	/* Ensure return probe has no C argument */
	for (i = 0; i < pp->nr_args; i++)
		if (is_c_varname(pp->args[i])) {
			if (retp)
				semantic_error("You can't specify local"
						" variable for kretprobe");
			session.need_dwarf = 1;
		}

	debug("%d arguments\n", pp->nr_args);
	return 0;
}

#ifndef NO_LIBDWARF
static int open_default_vmlinux(void)
{
	struct utsname uts;
	char fname[MAX_PATH_LEN];
	int fd, ret, i;

	ret = uname(&uts);
	if (ret) {
		debug("uname() failed.\n");
		return -errno;
	}
	session.release = uts.release;
	for (i = 0; i < NR_SEARCH_PATH; i++) {
		ret = snprintf(fname, MAX_PATH_LEN,
			       default_search_path[i], session.release);
		if (ret >= MAX_PATH_LEN || ret < 0) {
			debug("Filename(%d,%s) is too long.\n", i, uts.release);
			errno = E2BIG;
			return -E2BIG;
		}
		debug("try to open %s\n", fname);
		fd = open(fname, O_RDONLY);
		if (fd >= 0)
			break;
	}
	return fd;
}
#endif

static const char * const probe_usage[] = {
	"perf probe [<options>] -P 'PROBEDEF' [-P 'PROBEDEF' ...]",
	NULL
};

static const struct option options[] = {
#ifndef NO_LIBDWARF
	OPT_STRING('k', "vmlinux", &session.vmlinux, "file",
		"vmlinux/module pathname"),
#endif
	OPT_CALLBACK('P', "probe", NULL,
#ifdef NO_LIBDWARF
		"p|r:[GRP/]NAME FUNC[+OFFS] [ARG ...]",
#else
		"p|r:[GRP/]NAME FUNC[+OFFS][@SRC]|@SRC:LINE [ARG ...]",
#endif
		"probe point definition, where\n"
		"\t\tp:\tkprobe probe\n"
		"\t\tr:\tkretprobe probe\n"
		"\t\tGRP:\tGroup name (optional)\n"
		"\t\tNAME:\tEvent name\n"
		"\t\tFUNC:\tFunction name\n"
		"\t\tOFFS:\tOffset from function entry (in byte)\n"
#ifdef NO_LIBDWARF
		"\t\tARG:\tProbe argument (only \n"
#else
		"\t\tSRC:\tSource code path\n"
		"\t\tLINE:\tLine number\n"
		"\t\tARG:\tProbe argument (local variable name or\n"
#endif
		"\t\t\tkprobe-tracer argument format is supported.)\n",
		parse_probepoint),
	OPT_END()
};

static int write_new_event(int fd, const char *buf)
{
	int ret;

	printf("Adding new event: %s\n", buf);
	ret = write(fd, buf, strlen(buf));
	if (ret <= 0)
		die("failed to create event.");

	return ret;
}

#define MAX_CMDLEN 256

static int synthesize_probepoint(struct probe_point *pp)
{
	char *buf;
	int i, len, ret;
	pp->probes[0] = buf = (char *)calloc(MAX_CMDLEN, sizeof(char));
	if (!buf)
		die("calloc");
	ret = snprintf(buf, MAX_CMDLEN, "%s+%d", pp->function, pp->offset);
	if (ret <= 0 || ret >= MAX_CMDLEN)
		goto error;
	len = ret;

	for (i = 0; i < pp->nr_args; i++) {
		ret = snprintf(&buf[len], MAX_CMDLEN - len, " %s",
			       pp->args[i]);
		if (ret <= 0 || ret >= MAX_CMDLEN - len)
			goto error;
		len += ret;
	}
	pp->found = 1;
	return pp->found;
error:
	free(pp->probes[0]);
	if (ret > 0)
		ret = -E2BIG;
	return ret;
}

int cmd_probe(int argc, const char **argv, const char *prefix __used)
{
	int i, j, fd, ret;
	struct probe_point *pp;
	char buf[MAX_CMDLEN];

	argc = parse_options(argc, argv, options, probe_usage,
		PARSE_OPT_STOP_AT_NON_OPTION);
	if (argc || session.nr_probe == 0)
		usage_with_options(probe_usage, options);

#ifdef NO_LIBDWARF
	if (session.need_dwarf)
		semantic_error("Dwarf-analysis is not supported");
#endif

	/* Synthesize probes without dwarf */
	for (j = 0; j < session.nr_probe; j++) {
#ifndef NO_LIBDWARF
		if (session.events[j][0] != 'r') {
			session.need_dwarf = 1;
			continue;
		}
#endif
		ret = synthesize_probepoint(&session.probes[j]);
		if (ret == -E2BIG)
			semantic_error("probe point is too long.");
		else if (ret < 0)
			die("snprintf");
	}

#ifndef NO_LIBDWARF
	if (!session.need_dwarf)
		goto setup_probes;

	if (session.vmlinux)
		fd = open(session.vmlinux, O_RDONLY);
	else
		fd = open_default_vmlinux();
	if (fd < 0)
		die("vmlinux/module file open");

	/* Searching probe points */
	for (j = 0; j < session.nr_probe; j++) {
		pp = &session.probes[j];
		if (pp->found)
			continue;

		lseek(fd, SEEK_SET, 0);
		ret = find_probepoint(fd, pp);
		if (ret <= 0)
			die("No probe point found.\n");
		debug("probe event %s found\n", session.events[j]);
	}
	close(fd);

setup_probes:
#endif /* !NO_LIBDWARF */

	/* Settng up probe points */
	snprintf(buf, MAX_CMDLEN, "%s/../kprobe_events", debugfs_path);
	fd = open(buf, O_WRONLY, O_APPEND);
	if (fd < 0)
		die("kprobe_events open");
	for (j = 0; j < session.nr_probe; j++) {
		pp = &session.probes[j];
		if (pp->found == 1) {
			snprintf(buf, MAX_CMDLEN, "%s %s\n",
				session.events[j], pp->probes[0]);
			write_new_event(fd, buf);
		} else
			for (i = 0; i < pp->found; i++) {
				snprintf(buf, MAX_CMDLEN, "%s%d %s\n",
					session.events[j], i, pp->probes[i]);
				write_new_event(fd, buf);
			}
	}
	close(fd);
	return 0;
}
Commit	Line	Data
4ea42b18 MH	1	/*
	2	* builtin-probe.c
	3	*
	4	* Builtin probe command: Set up probe events by C expression
	5	*
	6	* Written by Masami Hiramatsu <mhiramat@redhat.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	21	*
	22	*/
	23	#define _GNU_SOURCE
	24	#include <sys/utsname.h>
	25	#include <sys/types.h>
	26	#include <sys/stat.h>
	27	#include <fcntl.h>
	28	#include <errno.h>
	29	#include <stdio.h>
	30	#include <unistd.h>
	31	#include <stdlib.h>
	32	#include <string.h>
	33
	34	#undef _GNU_SOURCE
	35	#include "perf.h"
	36	#include "builtin.h"
	37	#include "util/util.h"
	38	#include "util/parse-options.h"
	39	#include "util/parse-events.h" /* For debugfs_path */
	40	#include "util/probe-finder.h"
	41
	42	/* Default vmlinux search paths */
	43	#define NR_SEARCH_PATH 3
	44	const char *default_search_path[NR_SEARCH_PATH] = {
	45	"/lib/modules/%s/build/vmlinux", /* Custom build kernel */
	46	"/usr/lib/debug/lib/modules/%s/vmlinux", /* Red Hat debuginfo */
	47	"/boot/vmlinux-debug-%s", /* Ubuntu */
	48	};
	49
	50	#define MAX_PATH_LEN 256
	51	#define MAX_PROBES 128
074fc0e4	52	#define MAX_PROBE_ARGS 128
4ea42b18 MH	53
	54	/* Session management structure */
	55	static struct {
	56	char *vmlinux;
	57	char *release;
23e8ec0d	58	int need_dwarf;
4ea42b18 MH	59	int nr_probe;
	60	struct probe_point probes[MAX_PROBES];
	61	char *events[MAX_PROBES];
	62	} session;
	63
074fc0e4	64	#define semantic_error(msg ...) die("Semantic error :" msg)
4ea42b18 MH	65
	66	static int parse_probepoint(const struct option *opt __used,
	67	const char *str, int unset __used)
	68	{
	69	char argv[MAX_PROBE_ARGS + 2]; / Event + probe + args */
	70	int argc, i;
	71	char arg, ptr;
	72	struct probe_point *pp = &session.probes[session.nr_probe];
	73	char **event = &session.events[session.nr_probe];
	74	int retp = 0;
	75
	76	if (!str) /* The end of probe points */
	77	return 0;
	78
	79	debug("Probe-define(%d): %s\n", session.nr_probe, str);
	80	if (++session.nr_probe == MAX_PROBES)
	81	semantic_error("Too many probes");
	82
	83	/* Separate arguments, similar to argv_split */
	84	argc = 0;
	85	do {
	86	/* Skip separators */
	87	while (isspace(*str))
	88	str++;
	89
	90	/* Add an argument */
	91	if (*str != '\0') {
	92	const char *s = str;
	93
	94	/* Skip the argument */
	95	while (!isspace(str) && str != '\0')
	96	str++;
	97
	98	/* Duplicate the argument */
	99	argv[argc] = strndup(s, str - s);
	100	if (argv[argc] == NULL)
074fc0e4	101	die("strndup");
4ea42b18 MH	102	if (++argc == MAX_PROBE_ARGS)
	103	semantic_error("Too many arguments");
	104	debug("argv[%d]=%s\n", argc, argv[argc - 1]);
	105	}
	106	} while (*str != '\0');
	107	if (argc < 2)
	108	semantic_error("Need event-name and probe-point at least.");
	109
	110	/* Parse the event name */
	111	if (argv[0][0] == 'r')
	112	retp = 1;
	113	else if (argv[0][0] != 'p')
	114	semantic_error("You must specify 'p'(kprobe) or"
	115	" 'r'(kretprobe) first.");
	116	/* TODO: check event name */
	117	*event = argv[0];
	118
	119	/* Parse probe point */
	120	arg = argv[1];
	121	if (arg[0] == '@') {
	122	/* Source Line */
	123	arg++;
	124	ptr = strchr(arg, ':');
	125	if (!ptr \|\| !isdigit(ptr[1]))
	126	semantic_error("Line number is required.");
	127	*ptr++ = '\0';
	128	if (strlen(arg) == 0)
	129	semantic_error("No file name.");
	130	pp->file = strdup(arg);
	131	pp->line = atoi(ptr);
	132	if (!pp->file \|\| !pp->line)
	133	semantic_error("Failed to parse line.");
	134	debug("file:%s line:%d\n", pp->file, pp->line);
	135	} else {
	136	/* Function name */
	137	ptr = strchr(arg, '+');
	138	if (ptr) {
	139	if (!isdigit(ptr[1]))
	140	semantic_error("Offset is required.");
	141	*ptr++ = '\0';
	142	pp->offset = atoi(ptr);
	143	} else
	144	ptr = arg;
	145	ptr = strchr(ptr, '@');
	146	if (ptr) {
	147	*ptr++ = '\0';
	148	pp->file = strdup(ptr);
	149	}
	150	pp->function = strdup(arg);
	151	debug("symbol:%s file:%s offset:%d\n",
	152	pp->function, pp->file, pp->offset);
	153	}
	154	free(argv[1]);
23e8ec0d MH	155	if (pp->file)
23e8ec0d MH	156	session.need_dwarf = 1;
4ea42b18 MH	157
	158	/* Copy arguments */
	159	pp->nr_args = argc - 2;
	160	if (pp->nr_args > 0) {
	161	pp->args = (char *)malloc(sizeof(char ) * pp->nr_args);
	162	if (!pp->args)
074fc0e4	163	die("malloc");
4ea42b18 MH	164	memcpy(pp->args, &argv[2], sizeof(char ) pp->nr_args);
	165	}
	166
	167	/* Ensure return probe has no C argument */
23e8ec0d MH	168	for (i = 0; i < pp->nr_args; i++)
	169	if (is_c_varname(pp->args[i])) {
	170	if (retp)
4ea42b18 MH	171	semantic_error("You can't specify local"
4ea42b18 MH	172	" variable for kretprobe");
23e8ec0d MH	173	session.need_dwarf = 1;
	174	}
	175
4ea42b18 MH	176	debug("%d arguments\n", pp->nr_args);
	177	return 0;
	178	}
	179
23e8ec0d	180	#ifndef NO_LIBDWARF
4ea42b18 MH	181	static int open_default_vmlinux(void)
	182	{
	183	struct utsname uts;
	184	char fname[MAX_PATH_LEN];
	185	int fd, ret, i;
	186
	187	ret = uname(&uts);
	188	if (ret) {
	189	debug("uname() failed.\n");
	190	return -errno;
	191	}
	192	session.release = uts.release;
	193	for (i = 0; i < NR_SEARCH_PATH; i++) {
	194	ret = snprintf(fname, MAX_PATH_LEN,
	195	default_search_path[i], session.release);
	196	if (ret >= MAX_PATH_LEN \|\| ret < 0) {
	197	debug("Filename(%d,%s) is too long.\n", i, uts.release);
	198	errno = E2BIG;
	199	return -E2BIG;
	200	}
	201	debug("try to open %s\n", fname);
	202	fd = open(fname, O_RDONLY);
	203	if (fd >= 0)
	204	break;
	205	}
	206	return fd;
	207	}
23e8ec0d	208	#endif
4ea42b18 MH	209
	210	static const char * const probe_usage[] = {
	211	"perf probe [<options>] -P 'PROBEDEF' [-P 'PROBEDEF' ...]",
	212	NULL
	213	};
	214
	215	static const struct option options[] = {
23e8ec0d	216	#ifndef NO_LIBDWARF
4ea42b18 MH	217	OPT_STRING('k', "vmlinux", &session.vmlinux, "file",
4ea42b18 MH	218	"vmlinux/module pathname"),
23e8ec0d	219	#endif
4ea42b18	220	OPT_CALLBACK('P', "probe", NULL,
23e8ec0d MH	221	#ifdef NO_LIBDWARF
	222	"p\|r:[GRP/]NAME FUNC[+OFFS] [ARG ...]",
	223	#else
4ea42b18	224	"p\|r:[GRP/]NAME FUNC[+OFFS][@SRC]\|@SRC:LINE [ARG ...]",
23e8ec0d	225	#endif
4ea42b18 MH	226	"probe point definition, where\n"
	227	"\t\tp:\tkprobe probe\n"
	228	"\t\tr:\tkretprobe probe\n"
	229	"\t\tGRP:\tGroup name (optional)\n"
	230	"\t\tNAME:\tEvent name\n"
	231	"\t\tFUNC:\tFunction name\n"
	232	"\t\tOFFS:\tOffset from function entry (in byte)\n"
23e8ec0d MH	233	#ifdef NO_LIBDWARF
	234	"\t\tARG:\tProbe argument (only \n"
	235	#else
4ea42b18 MH	236	"\t\tSRC:\tSource code path\n"
	237	"\t\tLINE:\tLine number\n"
	238	"\t\tARG:\tProbe argument (local variable name or\n"
23e8ec0d	239	#endif
4ea42b18 MH	240	"\t\t\tkprobe-tracer argument format is supported.)\n",
	241	parse_probepoint),
	242	OPT_END()
	243	};
	244
	245	static int write_new_event(int fd, const char *buf)
	246	{
	247	int ret;
	248
	249	printf("Adding new event: %s\n", buf);
	250	ret = write(fd, buf, strlen(buf));
	251	if (ret <= 0)
074fc0e4	252	die("failed to create event.");
4ea42b18 MH	253
	254	return ret;
	255	}
	256
	257	#define MAX_CMDLEN 256
	258
	259	static int synthesize_probepoint(struct probe_point *pp)
	260	{
	261	char *buf;
	262	int i, len, ret;
	263	pp->probes[0] = buf = (char *)calloc(MAX_CMDLEN, sizeof(char));
	264	if (!buf)
074fc0e4	265	die("calloc");
4ea42b18 MH	266	ret = snprintf(buf, MAX_CMDLEN, "%s+%d", pp->function, pp->offset);
	267	if (ret <= 0 \|\| ret >= MAX_CMDLEN)
	268	goto error;
	269	len = ret;
	270
	271	for (i = 0; i < pp->nr_args; i++) {
	272	ret = snprintf(&buf[len], MAX_CMDLEN - len, " %s",
	273	pp->args[i]);
	274	if (ret <= 0 \|\| ret >= MAX_CMDLEN - len)
	275	goto error;
	276	len += ret;
	277	}
	278	pp->found = 1;
	279	return pp->found;
	280	error:
	281	free(pp->probes[0]);
	282	if (ret > 0)
	283	ret = -E2BIG;
	284	return ret;
	285	}
	286
	287	int cmd_probe(int argc, const char *argv, const char prefix __used)
	288	{
23e8ec0d	289	int i, j, fd, ret;
4ea42b18 MH	290	struct probe_point *pp;
	291	char buf[MAX_CMDLEN];
	292
	293	argc = parse_options(argc, argv, options, probe_usage,
	294	PARSE_OPT_STOP_AT_NON_OPTION);
	295	if (argc \|\| session.nr_probe == 0)
	296	usage_with_options(probe_usage, options);
	297
23e8ec0d MH	298	#ifdef NO_LIBDWARF
	299	if (session.need_dwarf)
	300	semantic_error("Dwarf-analysis is not supported");
	301	#endif
	302
	303	/* Synthesize probes without dwarf */
4ea42b18	304	for (j = 0; j < session.nr_probe; j++) {
23e8ec0d	305	#ifndef NO_LIBDWARF
4ea42b18	306	if (session.events[j][0] != 'r') {
23e8ec0d	307	session.need_dwarf = 1;
4ea42b18 MH	308	continue;
4ea42b18 MH	309	}
23e8ec0d	310	#endif
4ea42b18 MH	311	ret = synthesize_probepoint(&session.probes[j]);
	312	if (ret == -E2BIG)
	313	semantic_error("probe point is too long.");
074fc0e4 MH	314	else if (ret < 0)
074fc0e4 MH	315	die("snprintf");
4ea42b18 MH	316	}
4ea42b18 MH	317
23e8ec0d MH	318	#ifndef NO_LIBDWARF
23e8ec0d MH	319	if (!session.need_dwarf)
4ea42b18 MH	320	goto setup_probes;
	321
	322	if (session.vmlinux)
	323	fd = open(session.vmlinux, O_RDONLY);
	324	else
	325	fd = open_default_vmlinux();
074fc0e4 MH	326	if (fd < 0)
074fc0e4 MH	327	die("vmlinux/module file open");
4ea42b18 MH	328
	329	/* Searching probe points */
	330	for (j = 0; j < session.nr_probe; j++) {
	331	pp = &session.probes[j];
	332	if (pp->found)
	333	continue;
	334
	335	lseek(fd, SEEK_SET, 0);
	336	ret = find_probepoint(fd, pp);
074fc0e4 MH	337	if (ret <= 0)
074fc0e4 MH	338	die("No probe point found.\n");
4ea42b18 MH	339	debug("probe event %s found\n", session.events[j]);
	340	}
	341	close(fd);
	342
	343	setup_probes:
23e8ec0d MH	344	#endif /* !NO_LIBDWARF */
23e8ec0d MH	345
4ea42b18 MH	346	/* Settng up probe points */
	347	snprintf(buf, MAX_CMDLEN, "%s/../kprobe_events", debugfs_path);
	348	fd = open(buf, O_WRONLY, O_APPEND);
074fc0e4 MH	349	if (fd < 0)
074fc0e4 MH	350	die("kprobe_events open");
4ea42b18 MH	351	for (j = 0; j < session.nr_probe; j++) {
	352	pp = &session.probes[j];
	353	if (pp->found == 1) {
	354	snprintf(buf, MAX_CMDLEN, "%s %s\n",
	355	session.events[j], pp->probes[0]);
	356	write_new_event(fd, buf);
	357	} else
	358	for (i = 0; i < pp->found; i++) {
	359	snprintf(buf, MAX_CMDLEN, "%s%d %s\n",
	360	session.events[j], i, pp->probes[i]);
	361	write_new_event(fd, buf);
	362	}
	363	}
	364	close(fd);
	365	return 0;
	366	}
	367