[lttng-tools.git] / lttng / commands / enable_events.c

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *
 * 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; only version 2
 * of the License.
 *
 * 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 <popt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <inttypes.h>
#include <ctype.h>

#include "../cmd.h"
#include "../conf.h"
#include "../utils.h"

static char *opt_event_list;
static int opt_event_type;
static char *opt_kernel;
static char *opt_cmd_name;
static char *opt_session_name;
static int opt_pid_all;
static int opt_userspace;
static int opt_enable_all;
static pid_t opt_pid;
static char *opt_probe;
static char *opt_function;
static char *opt_function_entry_symbol;
static char *opt_channel_name;

enum {
	OPT_HELP = 1,
	OPT_USERSPACE,
	OPT_TRACEPOINT,
	OPT_MARKER,
	OPT_PROBE,
	OPT_FUNCTION,
	OPT_FUNCTION_ENTRY,
	OPT_SYSCALL,
};

static struct lttng_handle *handle;

static struct poptOption long_options[] = {
	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	{"help",           'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
	{"session",        's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
	{"all-events",     'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
	{"channel",        'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
	{"kernel",         'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
	{"userspace",      'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0},
	{"all",            0,   POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
	{"pid",            'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
	{"tracepoint",     0,   POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
	{"marker",         0,   POPT_ARG_NONE, 0, OPT_MARKER, 0, 0},
	{"probe",         0,   POPT_ARG_STRING, 0, OPT_PROBE, 0, 0},
	{"function",       0,   POPT_ARG_STRING, 0, OPT_FUNCTION, 0, 0},
	{"function:entry", 0,   POPT_ARG_STRING, 0, OPT_FUNCTION_ENTRY, 0, 0},
	{"syscall",        0,     POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
	{0, 0, 0, 0, 0, 0, 0}
};

/*
 * usage
 */
static void usage(FILE *ofp)
{
	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "  -h, --help               Show this help\n");
	fprintf(ofp, "  -s, --session            Apply on session name\n");
	fprintf(ofp, "  -c, --channel            Apply on this channel\n");
	fprintf(ofp, "  -a, --all-events         Enable all tracepoints\n");
	fprintf(ofp, "  -k, --kernel             Apply for the kernel tracer\n");
	fprintf(ofp, "  -u, --userspace [CMD]    Apply for the user-space tracer\n");
	fprintf(ofp, "      --all                If -u, apply on all traceable apps\n");
	fprintf(ofp, "  -p, --pid PID            If -u, apply on a specific PID\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Event options:\n");
	fprintf(ofp, "    --tracepoint           Tracepoint event (default)\n");
	fprintf(ofp, "    --probe [addr | symbol | symbol+offset]\n");
	fprintf(ofp, "                           Dynamic probe.\n");
	fprintf(ofp, "                           Addr and offset can be octal (0NNN...),\n");
	fprintf(ofp, "                           decimal (NNN...) or hexadecimal (0xNNN...)\n");
	fprintf(ofp, "    --function [addr | symbol | symbol+offset]\n");
	fprintf(ofp, "                           Dynamic function entry/return probe.\n");
	fprintf(ofp, "                           Addr and offset can be octal (0NNN...),\n");
	fprintf(ofp, "                           decimal (NNN...) or hexadecimal (0xNNN...)\n");
	fprintf(ofp, "    --function:entry symbol\n");
	fprintf(ofp, "                           Function tracer event\n");
	fprintf(ofp, "    --syscall              System call event\n");
	fprintf(ofp, "    --marker               User-space marker (deprecated)\n");
	fprintf(ofp, "\n");
}

/*
 *  parse_probe_addr
 *
 *  Parse probe options.
 */
static int parse_probe_opts(struct lttng_event *ev, char *opt)
{
	int ret;
	char s_hex[19];
	char name[LTTNG_SYMBOL_NAME_LEN];

	if (opt == NULL) {
		ret = -1;
		goto end;
	}

	/* Check for symbol+offset */
	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
	if (ret == 2) {
		strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
		ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
		DBG("probe symbol %s", ev->attr.probe.symbol_name);
		if (strlen(s_hex) == 0) {
			ERR("Invalid probe offset %s", s_hex);
			ret = -1;
			goto end;
		}
		ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
		DBG("probe offset %" PRIu64, ev->attr.probe.offset);
		ev->attr.probe.addr = 0;
		goto end;
	}

	/* Check for symbol */
	if (isalpha(name[0])) {
		ret = sscanf(opt, "%s", name);
		if (ret == 1) {
			strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
			ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
			DBG("probe symbol %s", ev->attr.probe.symbol_name);
			ev->attr.probe.offset = 0;
			DBG("probe offset %" PRIu64, ev->attr.probe.offset);
			ev->attr.probe.addr = 0;
			goto end;
		}
	}

	/* Check for address */
	ret = sscanf(opt, "%s", s_hex);
	if (ret > 0) {
		if (strlen(s_hex) == 0) {
			ERR("Invalid probe address %s", s_hex);
			ret = -1;
			goto end;
		}
		ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
		DBG("probe addr %" PRIu64, ev->attr.probe.addr);
		ev->attr.probe.offset = 0;
		memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
		goto end;
	}

	/* No match */
	ret = -1;

end:
	return ret;
}

/*
 *  enable_events
 *
 *  Enabling event using the lttng API.
 */
static int enable_events(char *session_name)
{
	int err, ret = CMD_SUCCESS;
	char *event_name, *channel_name = NULL;
	struct lttng_event ev;
	struct lttng_domain dom;

	if (opt_channel_name == NULL) {
		err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
		if (err < 0) {
			ret = CMD_FATAL;
			goto error;
		}
	} else {
		channel_name = opt_channel_name;
	}

	/* Create lttng domain */
	if (opt_kernel) {
		dom.type = LTTNG_DOMAIN_KERNEL;
	}

	handle = lttng_create_handle(session_name, &dom);
	if (handle == NULL) {
		ret = -1;
		goto error;
	}

	if (opt_enable_all) {
		/* Default setup for enable all */
		ev.name[0] = '\0';
		ev.type = opt_event_type;

		ret = lttng_enable_event(handle, &ev, channel_name);
		if (ret < 0) {
			goto error;
		}

		switch (opt_event_type) {
		case LTTNG_EVENT_TRACEPOINT:
			if (opt_kernel) {
				MSG("All kernel tracepoints are enabled in channel %s",
						channel_name);
			}
			break;
		case LTTNG_EVENT_SYSCALL:
			if (opt_kernel) {
				MSG("All kernel system calls are enabled in channel %s",
						channel_name);
			}
			break;
		case LTTNG_EVENT_ALL:
			if (opt_kernel) {
				MSG("All kernel events are enabled in channel %s",
						channel_name);
			}
			break;
		default:
			/*
			 * We should not be here since lttng_enable_event should had failed
			 * on the event type.
			 */
			goto error;

		}

		goto end;
	}

	/* Strip event list */
	event_name = strtok(opt_event_list, ",");
	while (event_name != NULL) {
		/* Kernel tracer action */
		if (opt_kernel) {
			DBG("Enabling kernel event %s for channel %s",
					event_name, channel_name);
			/* Copy name and type of the event */
			strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
			ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
			ev.type = opt_event_type;

			switch (opt_event_type) {
			case LTTNG_EVENT_ALL:	/* Default behavior is tracepoint */
				ev.type = LTTNG_EVENT_TRACEPOINT;
				/* Fall-through */
			case LTTNG_EVENT_TRACEPOINT:
				break;
			case LTTNG_EVENT_PROBE:
				ret = parse_probe_opts(&ev, opt_probe);
				if (ret < 0) {
					ERR("Unable to parse probe options");
					ret = 0;
					goto error;
				}
				break;
			case LTTNG_EVENT_FUNCTION:
				ret = parse_probe_opts(&ev, opt_function);
				if (ret < 0) {
					ERR("Unable to parse function probe options");
					ret = 0;
					goto error;
				}
				break;
			case LTTNG_EVENT_FUNCTION_ENTRY:
				strncpy(ev.attr.ftrace.symbol_name,
					opt_function_entry_symbol,
					LTTNG_SYMBOL_NAME_LEN);
				ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
				break;
			case LTTNG_EVENT_SYSCALL:
				MSG("per-syscall selection not supported yet. Use \"-a\" for all syscalls.");
				ret = CMD_NOT_IMPLEMENTED;
				goto error;
			default:
				ret = CMD_NOT_IMPLEMENTED;
				goto error;
			}

			ret = lttng_enable_event(handle, &ev, channel_name);
			if (ret == 0) {
				MSG("Kernel event %s created in channel %s", event_name, channel_name);
			}
		} else if (opt_userspace) {		/* User-space tracer action */
			/*
			 * TODO: Waiting on lttng UST 2.0
			 */
			if (opt_pid_all) {
			} else if (opt_pid != 0) {
			}
			ret = CMD_NOT_IMPLEMENTED;
			goto error;
		} else {
			ERR("Please specify a tracer (--kernel or --userspace)");
			goto error;
		}

		/* Next event */
		event_name = strtok(NULL, ",");
	}

end:
error:
	if (opt_channel_name == NULL) {
		free(channel_name);
	}
	lttng_destroy_handle(handle);

	return ret;
}

/*
 *  cmd_enable_events
 *
 *  Add event to trace session
 */
int cmd_enable_events(int argc, const char **argv)
{
	int opt, ret;
	static poptContext pc;
	char *session_name = NULL;

	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	poptReadDefaultConfig(pc, 0);

	/* Default event type */
	opt_event_type = LTTNG_EVENT_ALL;

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
		case OPT_HELP:
			usage(stderr);
			ret = CMD_SUCCESS;
			goto end;
		case OPT_USERSPACE:
			opt_userspace = 1;
			opt_cmd_name = poptGetOptArg(pc);
			break;
		case OPT_TRACEPOINT:
			opt_event_type = LTTNG_EVENT_TRACEPOINT;
			break;
		case OPT_MARKER:
			ret = CMD_NOT_IMPLEMENTED;
			goto end;
		case OPT_PROBE:
			opt_event_type = LTTNG_EVENT_PROBE;
			opt_probe = poptGetOptArg(pc);
			break;
		case OPT_FUNCTION:
			opt_event_type = LTTNG_EVENT_FUNCTION;
			opt_function = poptGetOptArg(pc);
			break;
		case OPT_FUNCTION_ENTRY:
			opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
			opt_function_entry_symbol = poptGetOptArg(pc);
			break;
		case OPT_SYSCALL:
			opt_event_type = LTTNG_EVENT_SYSCALL;
			break;
		default:
			usage(stderr);
			ret = CMD_UNDEFINED;
			goto end;
		}
	}

	opt_event_list = (char*) poptGetArg(pc);
	if (opt_event_list == NULL && opt_enable_all == 0) {
		ERR("Missing event name(s).\n");
		usage(stderr);
		ret = CMD_SUCCESS;
		goto end;
	}

	if (!opt_session_name) {
		session_name = get_session_name();
		if (session_name == NULL) {
			ret = -1;
			goto end;
		}
	} else {
		session_name = opt_session_name;
	}

	ret = enable_events(session_name);

end:
	if (opt_session_name == NULL) {
		free(session_name);
	}

	return ret;
}
Commit	Line	Data
f3ed775e DG	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
82a3637f DG	6	* as published by the Free Software Foundation; only version 2
82a3637f DG	7	* of the License.
f3ed775e DG	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	17	*/
	18
	19	#define _GNU_SOURCE
	20	#include <popt.h>
	21	#include <stdio.h>
	22	#include <stdlib.h>
	23	#include <string.h>
	24	#include <sys/stat.h>
	25	#include <sys/types.h>
	26	#include <unistd.h>
5a0de755	27	#include <inttypes.h>
8f0d098b	28	#include <ctype.h>
f3ed775e	29
6e2d116c DG	30	#include "../cmd.h"
	31	#include "../conf.h"
	32	#include "../utils.h"
f3ed775e DG	33
	34	static char *opt_event_list;
	35	static int opt_event_type;
	36	static char *opt_kernel;
	37	static char *opt_cmd_name;
5440dc42	38	static char *opt_session_name;
f3ed775e DG	39	static int opt_pid_all;
	40	static int opt_userspace;
	41	static int opt_enable_all;
	42	static pid_t opt_pid;
cf0e5467	43	static char *opt_probe;
8f0d098b MD	44	static char *opt_function;
8f0d098b MD	45	static char *opt_function_entry_symbol;
f3ed775e DG	46	static char *opt_channel_name;
	47
	48	enum {
	49	OPT_HELP = 1,
	50	OPT_USERSPACE,
	51	OPT_TRACEPOINT,
	52	OPT_MARKER,
cf0e5467	53	OPT_PROBE,
f3ed775e	54	OPT_FUNCTION,
8f0d098b	55	OPT_FUNCTION_ENTRY,
a54bd42d	56	OPT_SYSCALL,
f3ed775e DG	57	};
f3ed775e DG	58
cd80958d DG	59	static struct lttng_handle *handle;
cd80958d DG	60
f3ed775e DG	61	static struct poptOption long_options[] = {
	62	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	63	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42	64	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
f3ed775e DG	65	{"all-events", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
	66	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
	67	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
	68	{"userspace", 'u', POPT_ARG_STRING \| POPT_ARGFLAG_OPTIONAL, 0, OPT_USERSPACE, 0, 0},
	69	{"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
	70	{"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
	71	{"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
	72	{"marker", 0, POPT_ARG_NONE, 0, OPT_MARKER, 0, 0},
cf0e5467	73	{"probe", 0, POPT_ARG_STRING, 0, OPT_PROBE, 0, 0},
f3ed775e	74	{"function", 0, POPT_ARG_STRING, 0, OPT_FUNCTION, 0, 0},
8f0d098b	75	{"function:entry", 0, POPT_ARG_STRING, 0, OPT_FUNCTION_ENTRY, 0, 0},
a54bd42d	76	{"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
f3ed775e DG	77	{0, 0, 0, 0, 0, 0, 0}
	78	};
	79
	80	/*
	81	* usage
	82	*/
	83	static void usage(FILE *ofp)
	84	{
	85	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	86	fprintf(ofp, "\n");
	87	fprintf(ofp, " -h, --help Show this help\n");
5440dc42	88	fprintf(ofp, " -s, --session Apply on session name\n");
f3ed775e DG	89	fprintf(ofp, " -c, --channel Apply on this channel\n");
	90	fprintf(ofp, " -a, --all-events Enable all tracepoints\n");
	91	fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
	92	fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
	93	fprintf(ofp, " --all If -u, apply on all traceable apps\n");
	94	fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n");
	95	fprintf(ofp, "\n");
	96	fprintf(ofp, "Event options:\n");
	97	fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
8f0d098b	98	fprintf(ofp, " --probe [addr \| symbol \| symbol+offset]\n");
cf0e5467 MD	99	fprintf(ofp, " Dynamic probe.\n");
	100	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	101	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
8f0d098b MD	102	fprintf(ofp, " --function [addr \| symbol \| symbol+offset]\n");
	103	fprintf(ofp, " Dynamic function entry/return probe.\n");
	104	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	105	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
	106	fprintf(ofp, " --function:entry symbol\n");
	107	fprintf(ofp, " Function tracer event\n");
a54bd42d	108	fprintf(ofp, " --syscall System call event\n");
f3ed775e DG	109	fprintf(ofp, " --marker User-space marker (deprecated)\n");
	110	fprintf(ofp, "\n");
	111	}
	112
0d63dd19	113	/*
cf0e5467	114	* parse_probe_addr
0d63dd19	115	*
cf0e5467	116	* Parse probe options.
0d63dd19	117	*/
cf0e5467	118	static int parse_probe_opts(struct lttng_event ev, char opt)
0d63dd19 DG	119	{
0d63dd19 DG	120	int ret;
8ff0bbd0	121	char s_hex[19];
0d63dd19 DG	122	char name[LTTNG_SYMBOL_NAME_LEN];
	123
	124	if (opt == NULL) {
	125	ret = -1;
8f0d098b	126	goto end;
0d63dd19 DG	127	}
	128
	129	/* Check for symbol+offset */
8ff0bbd0	130	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19	131	if (ret == 2) {
7d29a247	132	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	133	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467	134	DBG("probe symbol %s", ev->attr.probe.symbol_name);
8ff0bbd0 DG	135	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	136	ERR("Invalid probe offset %s", s_hex);
0d63dd19	137	ret = -1;
8f0d098b	138	goto end;
0d63dd19	139	}
8ff0bbd0	140	ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467	141	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78	142	ev->attr.probe.addr = 0;
8f0d098b MD	143	goto end;
	144	}
	145
	146	/* Check for symbol */
	147	if (isalpha(name[0])) {
	148	ret = sscanf(opt, "%s", name);
	149	if (ret == 1) {
	150	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	151	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b MD	152	DBG("probe symbol %s", ev->attr.probe.symbol_name);
	153	ev->attr.probe.offset = 0;
	154	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
	155	ev->attr.probe.addr = 0;
	156	goto end;
	157	}
0d63dd19 DG	158	}
	159
	160	/* Check for address */
8ff0bbd0	161	ret = sscanf(opt, "%s", s_hex);
0d63dd19	162	if (ret > 0) {
8ff0bbd0 DG	163	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	164	ERR("Invalid probe address %s", s_hex);
0d63dd19	165	ret = -1;
8f0d098b	166	goto end;
0d63dd19	167	}
8ff0bbd0	168	ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467	169	DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78 DG	170	ev->attr.probe.offset = 0;
3000dc78 DG	171	memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b	172	goto end;
0d63dd19 DG	173	}
	174
	175	/* No match */
	176	ret = -1;
	177
8f0d098b	178	end:
0d63dd19 DG	179	return ret;
	180	}
	181
f3ed775e DG	182	/*
	183	* enable_events
	184	*
	185	* Enabling event using the lttng API.
	186	*/
cd80958d	187	static int enable_events(char *session_name)
f3ed775e DG	188	{
f3ed775e DG	189	int err, ret = CMD_SUCCESS;
b73d0b29	190	char event_name, channel_name = NULL;
f3ed775e	191	struct lttng_event ev;
7d29a247	192	struct lttng_domain dom;
f3ed775e	193
f3ed775e DG	194	if (opt_channel_name == NULL) {
	195	err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
	196	if (err < 0) {
	197	ret = CMD_FATAL;
	198	goto error;
	199	}
	200	} else {
	201	channel_name = opt_channel_name;
	202	}
	203
7d29a247 DG	204	/* Create lttng domain */
	205	if (opt_kernel) {
	206	dom.type = LTTNG_DOMAIN_KERNEL;
	207	}
	208
cd80958d DG	209	handle = lttng_create_handle(session_name, &dom);
	210	if (handle == NULL) {
	211	ret = -1;
	212	goto error;
	213	}
1aef21b6	214
cd80958d	215	if (opt_enable_all) {
8c9ae521 DG	216	/* Default setup for enable all */
	217	ev.name[0] = '\0';
	218	ev.type = opt_event_type;
	219
	220	ret = lttng_enable_event(handle, &ev, channel_name);
	221	if (ret < 0) {
	222	goto error;
	223	}
	224
0133c199 MD	225	switch (opt_event_type) {
	226	case LTTNG_EVENT_TRACEPOINT:
	227	if (opt_kernel) {
7a3d1328	228	MSG("All kernel tracepoints are enabled in channel %s",
8c9ae521	229	channel_name);
0133c199	230	}
0133c199	231	break;
a54bd42d	232	case LTTNG_EVENT_SYSCALL:
0133c199	233	if (opt_kernel) {
8c9ae521 DG	234	MSG("All kernel system calls are enabled in channel %s",
8c9ae521 DG	235	channel_name);
c93d9daf	236	}
0133c199	237	break;
7a3d1328 MD	238	case LTTNG_EVENT_ALL:
	239	if (opt_kernel) {
	240	MSG("All kernel events are enabled in channel %s",
	241	channel_name);
	242	}
	243	break;
0133c199	244	default:
8c9ae521 DG	245	/*
	246	* We should not be here since lttng_enable_event should had failed
	247	* on the event type.
	248	*/
f3ed775e	249	goto error;
8c9ae521	250
f3ed775e	251	}
8c9ae521 DG	252
8c9ae521 DG	253	goto end;
f3ed775e DG	254	}
	255
	256	/* Strip event list */
	257	event_name = strtok(opt_event_list, ",");
	258	while (event_name != NULL) {
	259	/* Kernel tracer action */
	260	if (opt_kernel) {
	261	DBG("Enabling kernel event %s for channel %s",
	262	event_name, channel_name);
	263	/* Copy name and type of the event */
	264	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	265	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e DG	266	ev.type = opt_event_type;
	267
	268	switch (opt_event_type) {
7a3d1328 MD	269	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
	270	ev.type = LTTNG_EVENT_TRACEPOINT;
	271	/* Fall-through */
e6ddca71	272	case LTTNG_EVENT_TRACEPOINT:
f3ed775e	273	break;
7d29a247	274	case LTTNG_EVENT_PROBE:
cf0e5467	275	ret = parse_probe_opts(&ev, opt_probe);
0d63dd19	276	if (ret < 0) {
cf0e5467	277	ERR("Unable to parse probe options");
0d63dd19 DG	278	ret = 0;
	279	goto error;
	280	}
f3ed775e DG	281	break;
f3ed775e DG	282	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	283	ret = parse_probe_opts(&ev, opt_function);
	284	if (ret < 0) {
	285	ERR("Unable to parse function probe options");
	286	ret = 0;
	287	goto error;
	288	}
	289	break;
	290	case LTTNG_EVENT_FUNCTION_ENTRY:
	291	strncpy(ev.attr.ftrace.symbol_name,
	292	opt_function_entry_symbol,
	293	LTTNG_SYMBOL_NAME_LEN);
99497cd0	294	ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e	295	break;
a54bd42d	296	case LTTNG_EVENT_SYSCALL:
0133c199 MD	297	MSG("per-syscall selection not supported yet. Use \"-a\" for all syscalls.");
	298	ret = CMD_NOT_IMPLEMENTED;
	299	goto error;
f3ed775e DG	300	default:
	301	ret = CMD_NOT_IMPLEMENTED;
	302	goto error;
	303	}
	304
cd80958d	305	ret = lttng_enable_event(handle, &ev, channel_name);
7d29a247	306	if (ret == 0) {
f3ed775e DG	307	MSG("Kernel event %s created in channel %s", event_name, channel_name);
	308	}
	309	} else if (opt_userspace) { /* User-space tracer action */
	310	/*
	311	* TODO: Waiting on lttng UST 2.0
	312	*/
	313	if (opt_pid_all) {
	314	} else if (opt_pid != 0) {
	315	}
	316	ret = CMD_NOT_IMPLEMENTED;
	317	goto error;
	318	} else {
048e2159	319	ERR("Please specify a tracer (--kernel or --userspace)");
f3ed775e DG	320	goto error;
	321	}
	322
	323	/* Next event */
	324	event_name = strtok(NULL, ",");
	325	}
	326
8c9ae521	327	end:
f3ed775e	328	error:
b73d0b29 MD	329	if (opt_channel_name == NULL) {
	330	free(channel_name);
	331	}
cd80958d DG	332	lttng_destroy_handle(handle);
cd80958d DG	333
f3ed775e DG	334	return ret;
	335	}
	336
	337	/*
	338	* cmd_enable_events
	339	*
	340	* Add event to trace session
	341	*/
	342	int cmd_enable_events(int argc, const char **argv)
	343	{
	344	int opt, ret;
	345	static poptContext pc;
cd80958d	346	char *session_name = NULL;
f3ed775e DG	347
	348	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	349	poptReadDefaultConfig(pc, 0);
	350
	351	/* Default event type */
7a3d1328	352	opt_event_type = LTTNG_EVENT_ALL;
f3ed775e DG	353
	354	while ((opt = poptGetNextOpt(pc)) != -1) {
	355	switch (opt) {
	356	case OPT_HELP:
	357	usage(stderr);
	358	ret = CMD_SUCCESS;
	359	goto end;
	360	case OPT_USERSPACE:
	361	opt_userspace = 1;
	362	opt_cmd_name = poptGetOptArg(pc);
	363	break;
	364	case OPT_TRACEPOINT:
e6ddca71	365	opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e DG	366	break;
	367	case OPT_MARKER:
	368	ret = CMD_NOT_IMPLEMENTED;
	369	goto end;
cf0e5467	370	case OPT_PROBE:
7d29a247	371	opt_event_type = LTTNG_EVENT_PROBE;
cf0e5467	372	opt_probe = poptGetOptArg(pc);
f3ed775e DG	373	break;
	374	case OPT_FUNCTION:
	375	opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b MD	376	opt_function = poptGetOptArg(pc);
	377	break;
	378	case OPT_FUNCTION_ENTRY:
	379	opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
	380	opt_function_entry_symbol = poptGetOptArg(pc);
f3ed775e	381	break;
a54bd42d MD	382	case OPT_SYSCALL:
a54bd42d MD	383	opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199	384	break;
f3ed775e DG	385	default:
	386	usage(stderr);
	387	ret = CMD_UNDEFINED;
	388	goto end;
	389	}
	390	}
	391
	392	opt_event_list = (char*) poptGetArg(pc);
	393	if (opt_event_list == NULL && opt_enable_all == 0) {
	394	ERR("Missing event name(s).\n");
	395	usage(stderr);
	396	ret = CMD_SUCCESS;
	397	goto end;
	398	}
	399
cd80958d DG	400	if (!opt_session_name) {
	401	session_name = get_session_name();
	402	if (session_name == NULL) {
	403	ret = -1;
	404	goto end;
	405	}
	406	} else {
	407	session_name = opt_session_name;
	408	}
	409
	410	ret = enable_events(session_name);
f3ed775e DG	411
f3ed775e DG	412	end:
cd80958d DG	413	if (opt_session_name == NULL) {
	414	free(session_name);
	415	}
	416
f3ed775e DG	417	return ret;
f3ed775e DG	418	}