[lttng-tools.git] / src / bin / 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 "../command.h"

static char *opt_event_list;
static int opt_event_type;
static const char *opt_loglevel;
static int opt_loglevel_type;
static int opt_kernel;
static char *opt_session_name;
static int opt_userspace;
static int opt_enable_all;
static char *opt_probe;
static char *opt_function;
static char *opt_function_entry_symbol;
static char *opt_channel_name;
#if 0
/* Not implemented yet */
static char *opt_cmd_name;
static pid_t opt_pid;
#endif

enum {
	OPT_HELP = 1,
	OPT_TRACEPOINT,
	OPT_PROBE,
	OPT_FUNCTION,
	OPT_FUNCTION_ENTRY,
	OPT_SYSCALL,
	OPT_USERSPACE,
	OPT_LOGLEVEL,
	OPT_LOGLEVEL_ONLY,
	OPT_LIST_OPTIONS,
};

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",            '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},
#if 0
	/* Not implemented yet */
	{"userspace",      'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
	{"pid",            'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
#else
	{"userspace",      'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
#endif
	{"tracepoint",     0,   POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
	{"probe",          0,   POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
	{"function",       0,   POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
#if 0
	/*
	 * Currently removed from lttng kernel tracer. Removed from
	 * lttng UI to discourage its use.
	 */
	{"function:entry", 0,   POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
#endif
	{"syscall",        0,   POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
	{"loglevel",       0,     POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
	{"loglevel-only",  0,     POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
	{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, "      --list-options       Simple listing of options\n");
	fprintf(ofp, "  -s, --session            Apply to session name\n");
	fprintf(ofp, "  -c, --channel            Apply to this channel\n");
	fprintf(ofp, "  -a, --all                Enable all tracepoints\n");
	fprintf(ofp, "  -k, --kernel             Apply for the kernel tracer\n");
#if 0
	fprintf(ofp, "  -u, --userspace [CMD]    Apply to the user-space tracer\n");
	fprintf(ofp, "                           If no CMD, the domain used is UST global\n");
	fprintf(ofp, "                           or else the domain is UST EXEC_NAME\n");
	fprintf(ofp, "  -p, --pid PID            If -u, apply to specific PID (domain: UST PID)\n");
#else
	fprintf(ofp, "  -u, --userspace          Apply to the user-space tracer\n");
#endif
	fprintf(ofp, "\n");
	fprintf(ofp, "Event options:\n");
	fprintf(ofp, "    --tracepoint           Tracepoint event (default)\n");
	fprintf(ofp, "                           - userspace tracer supports wildcards at end of string.\n");
	fprintf(ofp, "                             Don't forget to quote to deal with bash expansion.\n");
	fprintf(ofp, "                             e.g.:\n");
	fprintf(ofp, "                               \"*\"\n");
	fprintf(ofp, "                               \"app_component:na*\"\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");
#if 0
	fprintf(ofp, "    --function:entry symbol\n");
	fprintf(ofp, "                           Function tracer event\n");
#endif
	fprintf(ofp, "    --syscall              System call event\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "    --loglevel name\n");
	fprintf(ofp, "                           Tracepoint loglevel range from 0 to loglevel\n");
	fprintf(ofp, "    --loglevel-only name\n");
	fprintf(ofp, "                           Tracepoint loglevel (only this loglevel)\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "                    The loglevel or loglevel-only options should be combined\n");
	fprintf(ofp, "                    with a tracepoint name (or tracepoint wildcard).\n");
	fprintf(ofp, "                    Available loglevels: (higher value means more verbose)\n");
	fprintf(ofp, "                               TRACE_EMERG    = 0\n");
	fprintf(ofp, "                               TRACE_ALERT    = 1\n");
	fprintf(ofp, "                               TRACE_CRIT     = 2\n");
	fprintf(ofp, "                               TRACE_ERR      = 3\n");
	fprintf(ofp, "                               TRACE_WARNING  = 4\n");
	fprintf(ofp, "                               TRACE_NOTICE   = 5\n");
	fprintf(ofp, "                               TRACE_INFO     = 6\n");
	fprintf(ofp, "                               TRACE_SYSTEM   = 7\n");
	fprintf(ofp, "                               TRACE_PROCESS  = 8\n");
	fprintf(ofp, "                               TRACE_MODULE   = 9\n");
	fprintf(ofp, "                               TRACE_UNIT     = 10\n");
	fprintf(ofp, "                               TRACE_CLASS    = 11\n");
	fprintf(ofp, "                               TRACE_OBJECT   = 12\n");
	fprintf(ofp, "                               TRACE_FUNCTION = 13\n");
	fprintf(ofp, "                               TRACE_PRINTF   = 14\n");
	fprintf(ofp, "                               TRACE_DEBUG    = 15\n");
	fprintf(ofp, "\n");
}

/*
 * 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;
}

/*
 * Maps this from string to value
 *
 * TRACE_EMERG = 0,
 * TRACE_ALERT = 1,
 * TRACE_CRIT = 2,
 * TRACE_ERR = 3,
 * TRACE_WARNING = 4,
 * TRACE_NOTICE = 5,
 * TRACE_INFO = 6,
 * TRACE_SYSTEM = 7,
 * TRACE_PROCESS = 8,
 * TRACE_MODULE = 9,
 * TRACE_UNIT = 10,
 * TRACE_CLASS = 11,
 * TRACE_OBJECT = 12,
 * TRACE_FUNCTION = 13,
 * TRACE_PRINTF = 14,
 * TRACE_DEBUG = 15,
 */
static
int loglevel_str_to_value(const char *str)
{
	if (!strcmp(str, "TRACE_EMERG")) {
		return 0;
	} else if (!strcmp(str, "TRACE_ALERT")) {
		return 1;
	} else if (!strcmp(str, "TRACE_CRIT")) {
		return 2;
	} else if (!strcmp(str, "TRACE_ERR")) {
		return 3;
	} else if (!strcmp(str, "TRACE_WARNING")) {
		return 4;
	} else if (!strcmp(str, "TRACE_NOTICE")) {
		return 5;
	} else if (!strcmp(str, "TRACE_INFO")) {
		return 6;
	} else if (!strcmp(str, "TRACE_SYSTEM")) {
		return 7;
	} else if (!strcmp(str, "TRACE_PROCESS")) {
		return 8;
	} else if (!strcmp(str, "TRACE_MODULE")) {
		return 9;
	} else if (!strcmp(str, "TRACE_UNIT")) {
		return 10;
	} else if (!strcmp(str, "TRACE_CLASS")) {
		return 11;
	} else if (!strcmp(str, "TRACE_OBJECT")) {
		return 12;
	} else if (!strcmp(str, "TRACE_FUNCTION")) {
		return 13;
	} else if (!strcmp(str, "TRACE_PRINTF")) {
		return 14;
	} else if (!strcmp(str, "TRACE_DEBUG")) {
		return 15;
	} else {
		return -1;
	}
}

/*
 * Enabling event using the lttng API.
 */
static int enable_events(char *session_name)
{
	int err, ret = CMD_SUCCESS, warn = 0;
	char *event_name, *channel_name = NULL;
	struct lttng_event ev;
	struct lttng_domain dom;

	/* Create lttng domain */
	if (opt_kernel) {
		dom.type = LTTNG_DOMAIN_KERNEL;
	} else if (opt_userspace) {
		dom.type = LTTNG_DOMAIN_UST;
	} else {
		ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
		ret = CMD_ERROR;
		goto error;
	}

	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;
	}

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

	if (opt_enable_all) {
		/* Default setup for enable all */
		if (opt_kernel) {
			ev.type = opt_event_type;
			ev.name[0] = '\0';
			/* kernel loglevels not implemented */
			ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
		} else {
			ev.type = LTTNG_EVENT_TRACEPOINT;
			strcpy(ev.name, "*");
			ev.loglevel_type = opt_loglevel_type;
			if (opt_loglevel) {
				ev.loglevel = loglevel_str_to_value(opt_loglevel);
				if (ev.loglevel == -1) {
					ERR("Unknown loglevel %s", opt_loglevel);
					ret = -1;
					goto error;
				}
			}
		}

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

		switch (opt_event_type) {
		case LTTNG_EVENT_TRACEPOINT:
			MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
				opt_kernel ? "kernel" : "UST", channel_name,
				opt_loglevel ? : "<all>");
			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:
			MSG("All %s events are enabled in channel %s for loglevel %s",
				opt_kernel ? "kernel" : "UST", channel_name,
				opt_loglevel ? : "<all>");
			break;
		default:
			/*
			 * We should not be here since lttng_enable_event should have
			 * failed on the event type.
			 */
			goto error;
		}
		goto end;
	}

	/* Strip event list */
	event_name = strtok(opt_event_list, ",");
	while (event_name != NULL) {
		/* 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;

		/* Kernel tracer action */
		if (opt_kernel) {
			DBG("Enabling kernel event %s for channel %s",
					event_name, channel_name);

			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.");
			default:
				ret = CMD_UNDEFINED;
				goto error;
			}

			if (opt_loglevel) {
				MSG("Kernel loglevels are not supported.");
				ret = CMD_UNDEFINED;
				goto error;
			}

			/* kernel loglevels not implemented */
			ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
		} else if (opt_userspace) {		/* User-space tracer action */
#if 0
			if (opt_cmd_name != NULL || opt_pid) {
				MSG("Only supporting tracing all UST processes (-u) for now.");
				ret = CMD_UNDEFINED;
				goto error;
			}
#endif

			DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
					channel_name, opt_loglevel ? : "<all>");

			switch (opt_event_type) {
			case LTTNG_EVENT_ALL:	/* Default behavior is tracepoint */
				/* Fall-through */
			case LTTNG_EVENT_TRACEPOINT:
				/* Copy name and type of the event */
				ev.type = LTTNG_EVENT_TRACEPOINT;
				strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
				ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
				break;
			case LTTNG_EVENT_PROBE:
			case LTTNG_EVENT_FUNCTION:
			case LTTNG_EVENT_FUNCTION_ENTRY:
			case LTTNG_EVENT_SYSCALL:
			default:
				ERR("Event type not available for user-space tracing");
				ret = CMD_UNDEFINED;
				goto error;
			}

			ev.loglevel_type = opt_loglevel_type;
			if (opt_loglevel) {
				ev.loglevel = loglevel_str_to_value(opt_loglevel);
				if (ev.loglevel == -1) {
					ERR("Unknown loglevel %s", opt_loglevel);
					ret = -1;
					goto error;
				}
			}
		} else {
			ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
			ret = CMD_ERROR;
			goto error;
		}

		ret = lttng_enable_event(handle, &ev, channel_name);
		if (ret < 0) {
			ERR("Event %s: %s (channel %s, session %s)", event_name,
					lttng_strerror(ret), channel_name, session_name);
			warn = 1;
		} else {
			MSG("%s event %s created in channel %s",
					opt_kernel ? "kernel": "UST", event_name, channel_name);
		}

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

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

	return ret;
}

/*
 * Add event to trace session
 */
int cmd_enable_events(int argc, const char **argv)
{
	int opt, ret = CMD_SUCCESS;
	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(stdout);
			goto end;
		case OPT_TRACEPOINT:
			opt_event_type = LTTNG_EVENT_TRACEPOINT;
			break;
		case OPT_PROBE:
			opt_event_type = LTTNG_EVENT_PROBE;
			break;
		case OPT_FUNCTION:
			opt_event_type = LTTNG_EVENT_FUNCTION;
			break;
		case OPT_FUNCTION_ENTRY:
			opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
			break;
		case OPT_SYSCALL:
			opt_event_type = LTTNG_EVENT_SYSCALL;
			break;
		case OPT_USERSPACE:
			opt_userspace = 1;
			break;
		case OPT_LOGLEVEL:
			opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
			opt_loglevel = poptGetOptArg(pc);
			break;
		case OPT_LOGLEVEL_ONLY:
			opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
			opt_loglevel = poptGetOptArg(pc);
			break;
		case OPT_LIST_OPTIONS:
			list_cmd_options(stdout, long_options);
			goto end;
		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_ERROR;
		goto end;
	}

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

	ret = enable_events(session_name);

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

	poptFreeContext(pc);
	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
c399183f	30	#include "../command.h"
f3ed775e DG	31
	32	static char *opt_event_list;
	33	static int opt_event_type;
0cda4f28 MD	34	static const char *opt_loglevel;
0cda4f28 MD	35	static int opt_loglevel_type;
6181537c	36	static int opt_kernel;
5440dc42	37	static char *opt_session_name;
f3ed775e DG	38	static int opt_userspace;
f3ed775e DG	39	static int opt_enable_all;
cf0e5467	40	static char *opt_probe;
8f0d098b MD	41	static char *opt_function;
8f0d098b MD	42	static char *opt_function_entry_symbol;
f3ed775e	43	static char *opt_channel_name;
d78d6610 DG	44	#if 0
	45	/* Not implemented yet */
	46	static char *opt_cmd_name;
	47	static pid_t opt_pid;
	48	#endif
f3ed775e DG	49
	50	enum {
	51	OPT_HELP = 1,
f3ed775e	52	OPT_TRACEPOINT,
cf0e5467	53	OPT_PROBE,
f3ed775e	54	OPT_FUNCTION,
8f0d098b	55	OPT_FUNCTION_ENTRY,
a54bd42d	56	OPT_SYSCALL,
eeac7d46	57	OPT_USERSPACE,
0cda4f28 MD	58	OPT_LOGLEVEL,
0cda4f28 MD	59	OPT_LOGLEVEL_ONLY,
679b4943	60	OPT_LIST_OPTIONS,
f3ed775e DG	61	};
f3ed775e DG	62
cd80958d DG	63	static struct lttng_handle *handle;
cd80958d DG	64
f3ed775e DG	65	static struct poptOption long_options[] = {
	66	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	67	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42	68	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8	69	{"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e DG	70	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
f3ed775e DG	71	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610 DG	72	#if 0
d78d6610 DG	73	/* Not implemented yet */
40e9d5d3	74	{"userspace", 'u', POPT_ARG_STRING \| POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
f3ed775e	75	{"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
d78d6610 DG	76	#else
	77	{"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
	78	#endif
f3ed775e	79	{"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521	80	{"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3	81	{"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
b213d387 MD	82	#if 0
	83	/*
	84	* Currently removed from lttng kernel tracer. Removed from
	85	* lttng UI to discourage its use.
	86	*/
40e9d5d3	87	{"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
b213d387	88	#endif
7ebae521	89	{"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
0cda4f28 MD	90	{"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
0cda4f28 MD	91	{"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
679b4943	92	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
f3ed775e DG	93	{0, 0, 0, 0, 0, 0, 0}
	94	};
	95
	96	/*
	97	* usage
	98	*/
	99	static void usage(FILE *ofp)
	100	{
	101	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	102	fprintf(ofp, "\n");
	103	fprintf(ofp, " -h, --help Show this help\n");
679b4943	104	fprintf(ofp, " --list-options Simple listing of options\n");
27221701 DG	105	fprintf(ofp, " -s, --session Apply to session name\n");
27221701 DG	106	fprintf(ofp, " -c, --channel Apply to this channel\n");
e14f64a8	107	fprintf(ofp, " -a, --all Enable all tracepoints\n");
f3ed775e	108	fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
d78d6610	109	#if 0
27221701	110	fprintf(ofp, " -u, --userspace [CMD] Apply to the user-space tracer\n");
e14f64a8 DG	111	fprintf(ofp, " If no CMD, the domain used is UST global\n");
	112	fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
	113	fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
d78d6610	114	#else
27221701	115	fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n");
d78d6610	116	#endif
f3ed775e DG	117	fprintf(ofp, "\n");
	118	fprintf(ofp, "Event options:\n");
	119	fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
be49af1e MD	120	fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
	121	fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
	122	fprintf(ofp, " e.g.:\n");
	123	fprintf(ofp, " \"*\"\n");
	124	fprintf(ofp, " \"app_component:na*\"\n");
8f0d098b	125	fprintf(ofp, " --probe [addr \| symbol \| symbol+offset]\n");
cf0e5467 MD	126	fprintf(ofp, " Dynamic probe.\n");
	127	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	128	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
8f0d098b MD	129	fprintf(ofp, " --function [addr \| symbol \| symbol+offset]\n");
	130	fprintf(ofp, " Dynamic function entry/return probe.\n");
	131	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	132	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387	133	#if 0
8f0d098b MD	134	fprintf(ofp, " --function:entry symbol\n");
8f0d098b MD	135	fprintf(ofp, " Function tracer event\n");
b213d387	136	#endif
a54bd42d	137	fprintf(ofp, " --syscall System call event\n");
f3ed775e	138	fprintf(ofp, "\n");
300b8fd5 MD	139	fprintf(ofp, " --loglevel name\n");
	140	fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel\n");
	141	fprintf(ofp, " --loglevel-only name\n");
	142	fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
	143	fprintf(ofp, "\n");
	144	fprintf(ofp, " The loglevel or loglevel-only options should be combined\n");
	145	fprintf(ofp, " with a tracepoint name (or tracepoint wildcard).\n");
	146	fprintf(ofp, " Available loglevels: (higher value means more verbose)\n");
	147	fprintf(ofp, " TRACE_EMERG = 0\n");
	148	fprintf(ofp, " TRACE_ALERT = 1\n");
	149	fprintf(ofp, " TRACE_CRIT = 2\n");
	150	fprintf(ofp, " TRACE_ERR = 3\n");
	151	fprintf(ofp, " TRACE_WARNING = 4\n");
	152	fprintf(ofp, " TRACE_NOTICE = 5\n");
	153	fprintf(ofp, " TRACE_INFO = 6\n");
	154	fprintf(ofp, " TRACE_SYSTEM = 7\n");
	155	fprintf(ofp, " TRACE_PROCESS = 8\n");
	156	fprintf(ofp, " TRACE_MODULE = 9\n");
	157	fprintf(ofp, " TRACE_UNIT = 10\n");
	158	fprintf(ofp, " TRACE_CLASS = 11\n");
	159	fprintf(ofp, " TRACE_OBJECT = 12\n");
	160	fprintf(ofp, " TRACE_FUNCTION = 13\n");
	161	fprintf(ofp, " TRACE_PRINTF = 14\n");
	162	fprintf(ofp, " TRACE_DEBUG = 15\n");
	163	fprintf(ofp, "\n");
f3ed775e DG	164	}
f3ed775e DG	165
0d63dd19	166	/*
6181537c	167	* Parse probe options.
0d63dd19	168	*/
cf0e5467	169	static int parse_probe_opts(struct lttng_event ev, char opt)
0d63dd19 DG	170	{
0d63dd19 DG	171	int ret;
8ff0bbd0	172	char s_hex[19];
0d63dd19 DG	173	char name[LTTNG_SYMBOL_NAME_LEN];
	174
	175	if (opt == NULL) {
	176	ret = -1;
8f0d098b	177	goto end;
0d63dd19 DG	178	}
	179
	180	/* Check for symbol+offset */
8ff0bbd0	181	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19	182	if (ret == 2) {
7d29a247	183	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	184	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467	185	DBG("probe symbol %s", ev->attr.probe.symbol_name);
8ff0bbd0 DG	186	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	187	ERR("Invalid probe offset %s", s_hex);
0d63dd19	188	ret = -1;
8f0d098b	189	goto end;
0d63dd19	190	}
8ff0bbd0	191	ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467	192	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78	193	ev->attr.probe.addr = 0;
8f0d098b MD	194	goto end;
	195	}
	196
	197	/* Check for symbol */
	198	if (isalpha(name[0])) {
	199	ret = sscanf(opt, "%s", name);
	200	if (ret == 1) {
	201	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	202	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b MD	203	DBG("probe symbol %s", ev->attr.probe.symbol_name);
	204	ev->attr.probe.offset = 0;
	205	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
	206	ev->attr.probe.addr = 0;
	207	goto end;
	208	}
0d63dd19 DG	209	}
	210
	211	/* Check for address */
8ff0bbd0	212	ret = sscanf(opt, "%s", s_hex);
0d63dd19	213	if (ret > 0) {
8ff0bbd0 DG	214	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	215	ERR("Invalid probe address %s", s_hex);
0d63dd19	216	ret = -1;
8f0d098b	217	goto end;
0d63dd19	218	}
8ff0bbd0	219	ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467	220	DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78 DG	221	ev->attr.probe.offset = 0;
3000dc78 DG	222	memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b	223	goto end;
0d63dd19 DG	224	}
	225
	226	/* No match */
	227	ret = -1;
	228
8f0d098b	229	end:
0d63dd19 DG	230	return ret;
	231	}
	232
8005f29a MD	233	/*
	234	* Maps this from string to value
	235	*
	236	* TRACE_EMERG = 0,
	237	* TRACE_ALERT = 1,
	238	* TRACE_CRIT = 2,
	239	* TRACE_ERR = 3,
	240	* TRACE_WARNING = 4,
	241	* TRACE_NOTICE = 5,
	242	* TRACE_INFO = 6,
	243	* TRACE_SYSTEM = 7,
	244	* TRACE_PROCESS = 8,
	245	* TRACE_MODULE = 9,
	246	* TRACE_UNIT = 10,
	247	* TRACE_CLASS = 11,
	248	* TRACE_OBJECT = 12,
	249	* TRACE_FUNCTION = 13,
	250	* TRACE_PRINTF = 14,
	251	* TRACE_DEBUG = 15,
	252	*/
	253	static
	254	int loglevel_str_to_value(const char *str)
	255	{
	256	if (!strcmp(str, "TRACE_EMERG")) {
	257	return 0;
	258	} else if (!strcmp(str, "TRACE_ALERT")) {
	259	return 1;
	260	} else if (!strcmp(str, "TRACE_CRIT")) {
	261	return 2;
	262	} else if (!strcmp(str, "TRACE_ERR")) {
	263	return 3;
	264	} else if (!strcmp(str, "TRACE_WARNING")) {
	265	return 4;
	266	} else if (!strcmp(str, "TRACE_NOTICE")) {
	267	return 5;
	268	} else if (!strcmp(str, "TRACE_INFO")) {
	269	return 6;
	270	} else if (!strcmp(str, "TRACE_SYSTEM")) {
	271	return 7;
	272	} else if (!strcmp(str, "TRACE_PROCESS")) {
	273	return 8;
	274	} else if (!strcmp(str, "TRACE_MODULE")) {
	275	return 9;
	276	} else if (!strcmp(str, "TRACE_UNIT")) {
	277	return 10;
	278	} else if (!strcmp(str, "TRACE_CLASS")) {
	279	return 11;
	280	} else if (!strcmp(str, "TRACE_OBJECT")) {
	281	return 12;
	282	} else if (!strcmp(str, "TRACE_FUNCTION")) {
	283	return 13;
	284	} else if (!strcmp(str, "TRACE_PRINTF")) {
	285	return 14;
	286	} else if (!strcmp(str, "TRACE_DEBUG")) {
	287	return 15;
	288	} else {
	289	return -1;
	290	}
	291	}
	292
f3ed775e	293	/*
6181537c	294	* Enabling event using the lttng API.
f3ed775e	295	*/
cd80958d	296	static int enable_events(char *session_name)
f3ed775e	297	{
ae856491	298	int err, ret = CMD_SUCCESS, warn = 0;
b73d0b29	299	char event_name, channel_name = NULL;
f3ed775e	300	struct lttng_event ev;
7d29a247	301	struct lttng_domain dom;
f3ed775e	302
7d29a247 DG	303	/* Create lttng domain */
	304	if (opt_kernel) {
	305	dom.type = LTTNG_DOMAIN_KERNEL;
d78d6610	306	} else if (opt_userspace) {
2bdd86d4	307	dom.type = LTTNG_DOMAIN_UST;
6181537c	308	} else {
e14f64a8	309	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
d16c1a4c	310	ret = CMD_ERROR;
6181537c	311	goto error;
2bdd86d4	312	}
7d29a247	313
ae856491 DG	314	if (opt_channel_name == NULL) {
	315	err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
	316	if (err < 0) {
	317	ret = CMD_FATAL;
	318	goto error;
	319	}
	320	} else {
	321	channel_name = opt_channel_name;
	322	}
	323
cd80958d DG	324	handle = lttng_create_handle(session_name, &dom);
	325	if (handle == NULL) {
	326	ret = -1;
	327	goto error;
	328	}
1aef21b6	329
cd80958d	330	if (opt_enable_all) {
8c9ae521	331	/* Default setup for enable all */
75e8c5ab MD	332	if (opt_kernel) {
	333	ev.type = opt_event_type;
	334	ev.name[0] = '\0';
300b8fd5 MD	335	/* kernel loglevels not implemented */
300b8fd5 MD	336	ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
75e8c5ab MD	337	} else {
	338	ev.type = LTTNG_EVENT_TRACEPOINT;
	339	strcpy(ev.name, "*");
300b8fd5 MD	340	ev.loglevel_type = opt_loglevel_type;
	341	if (opt_loglevel) {
	342	ev.loglevel = loglevel_str_to_value(opt_loglevel);
	343	if (ev.loglevel == -1) {
	344	ERR("Unknown loglevel %s", opt_loglevel);
	345	ret = -1;
	346	goto error;
	347	}
	348	}
75e8c5ab	349	}
8c9ae521 DG	350
	351	ret = lttng_enable_event(handle, &ev, channel_name);
	352	if (ret < 0) {
	353	goto error;
	354	}
	355
0133c199 MD	356	switch (opt_event_type) {
0133c199 MD	357	case LTTNG_EVENT_TRACEPOINT:
300b8fd5 MD	358	MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
	359	opt_kernel ? "kernel" : "UST", channel_name,
	360	opt_loglevel ? : "<all>");
0133c199	361	break;
a54bd42d	362	case LTTNG_EVENT_SYSCALL:
0133c199	363	if (opt_kernel) {
8c9ae521 DG	364	MSG("All kernel system calls are enabled in channel %s",
8c9ae521 DG	365	channel_name);
c93d9daf	366	}
0133c199	367	break;
7a3d1328	368	case LTTNG_EVENT_ALL:
300b8fd5 MD	369	MSG("All %s events are enabled in channel %s for loglevel %s",
	370	opt_kernel ? "kernel" : "UST", channel_name,
	371	opt_loglevel ? : "<all>");
7a3d1328	372	break;
0133c199	373	default:
8c9ae521	374	/*
6181537c DG	375	* We should not be here since lttng_enable_event should have
6181537c DG	376	* failed on the event type.
8c9ae521	377	*/
f3ed775e DG	378	goto error;
f3ed775e DG	379	}
8c9ae521	380	goto end;
f3ed775e DG	381	}
	382
	383	/* Strip event list */
	384	event_name = strtok(opt_event_list, ",");
	385	while (event_name != NULL) {
6181537c DG	386	/* Copy name and type of the event */
	387	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	388	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
	389	ev.type = opt_event_type;
	390
f3ed775e DG	391	/* Kernel tracer action */
	392	if (opt_kernel) {
	393	DBG("Enabling kernel event %s for channel %s",
	394	event_name, channel_name);
f3ed775e DG	395
f3ed775e DG	396	switch (opt_event_type) {
7a3d1328 MD	397	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
	398	ev.type = LTTNG_EVENT_TRACEPOINT;
	399	/* Fall-through */
e6ddca71	400	case LTTNG_EVENT_TRACEPOINT:
f3ed775e	401	break;
7d29a247	402	case LTTNG_EVENT_PROBE:
cf0e5467	403	ret = parse_probe_opts(&ev, opt_probe);
0d63dd19	404	if (ret < 0) {
cf0e5467	405	ERR("Unable to parse probe options");
0d63dd19 DG	406	ret = 0;
	407	goto error;
	408	}
f3ed775e DG	409	break;
f3ed775e DG	410	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	411	ret = parse_probe_opts(&ev, opt_function);
	412	if (ret < 0) {
	413	ERR("Unable to parse function probe options");
	414	ret = 0;
	415	goto error;
	416	}
	417	break;
	418	case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c DG	419	strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
6181537c DG	420	LTTNG_SYMBOL_NAME_LEN);
99497cd0	421	ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e	422	break;
a54bd42d	423	case LTTNG_EVENT_SYSCALL:
6181537c DG	424	MSG("per-syscall selection not supported yet. Use \"-a\" "
6181537c DG	425	"for all syscalls.");
f3ed775e	426	default:
1ab1ea0b	427	ret = CMD_UNDEFINED;
f3ed775e DG	428	goto error;
f3ed775e DG	429	}
0cda4f28	430
ed7f4083	431	if (opt_loglevel) {
0cda4f28 MD	432	MSG("Kernel loglevels are not supported.");
	433	ret = CMD_UNDEFINED;
	434	goto error;
	435	}
	436
	437	/* kernel loglevels not implemented */
8005f29a	438	ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
f3ed775e	439	} else if (opt_userspace) { /* User-space tracer action */
d78d6610	440	#if 0
e14f64a8 DG	441	if (opt_cmd_name != NULL \|\| opt_pid) {
e14f64a8 DG	442	MSG("Only supporting tracing all UST processes (-u) for now.");
1ab1ea0b	443	ret = CMD_UNDEFINED;
2bdd86d4 MD	444	goto error;
2bdd86d4 MD	445	}
d78d6610	446	#endif
6181537c	447
300b8fd5 MD	448	DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
300b8fd5 MD	449	channel_name, opt_loglevel ? : "<all>");
2bdd86d4 MD	450
	451	switch (opt_event_type) {
	452	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4 MD	453	/* Fall-through */
2bdd86d4 MD	454	case LTTNG_EVENT_TRACEPOINT:
e4baff1e MD	455	/* Copy name and type of the event */
	456	ev.type = LTTNG_EVENT_TRACEPOINT;
	457	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	458	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4 MD	459	break;
	460	case LTTNG_EVENT_PROBE:
	461	case LTTNG_EVENT_FUNCTION:
	462	case LTTNG_EVENT_FUNCTION_ENTRY:
	463	case LTTNG_EVENT_SYSCALL:
	464	default:
cc62c0c0	465	ERR("Event type not available for user-space tracing");
1ab1ea0b	466	ret = CMD_UNDEFINED;
2bdd86d4 MD	467	goto error;
2bdd86d4 MD	468	}
0cda4f28 MD	469
0cda4f28 MD	470	ev.loglevel_type = opt_loglevel_type;
ed7f4083	471	if (opt_loglevel) {
8005f29a MD	472	ev.loglevel = loglevel_str_to_value(opt_loglevel);
	473	if (ev.loglevel == -1) {
	474	ERR("Unknown loglevel %s", opt_loglevel);
300b8fd5	475	ret = -1;
8005f29a MD	476	goto error;
8005f29a MD	477	}
ed7f4083	478	}
f3ed775e	479	} else {
e14f64a8	480	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
300b8fd5	481	ret = CMD_ERROR;
f3ed775e DG	482	goto error;
	483	}
	484
6181537c	485	ret = lttng_enable_event(handle, &ev, channel_name);
ae856491 DG	486	if (ret < 0) {
	487	ERR("Event %s: %s (channel %s, session %s)", event_name,
	488	lttng_strerror(ret), channel_name, session_name);
	489	warn = 1;
	490	} else {
6181537c DG	491	MSG("%s event %s created in channel %s",
	492	opt_kernel ? "kernel": "UST", event_name, channel_name);
	493	}
	494
f3ed775e DG	495	/* Next event */
	496	event_name = strtok(NULL, ",");
	497	}
	498
8c9ae521	499	end:
f3ed775e	500	error:
ae856491 DG	501	if (warn) {
	502	ret = CMD_WARNING;
	503	}
b73d0b29 MD	504	if (opt_channel_name == NULL) {
	505	free(channel_name);
	506	}
cd80958d DG	507	lttng_destroy_handle(handle);
cd80958d DG	508
f3ed775e DG	509	return ret;
	510	}
	511
	512	/*
6181537c	513	* Add event to trace session
f3ed775e DG	514	*/
	515	int cmd_enable_events(int argc, const char **argv)
	516	{
ca1c3607	517	int opt, ret = CMD_SUCCESS;
f3ed775e	518	static poptContext pc;
cd80958d	519	char *session_name = NULL;
f3ed775e DG	520
	521	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	522	poptReadDefaultConfig(pc, 0);
	523
	524	/* Default event type */
7a3d1328	525	opt_event_type = LTTNG_EVENT_ALL;
f3ed775e DG	526
	527	while ((opt = poptGetNextOpt(pc)) != -1) {
	528	switch (opt) {
	529	case OPT_HELP:
ca1c3607	530	usage(stdout);
f3ed775e	531	goto end;
f3ed775e	532	case OPT_TRACEPOINT:
e6ddca71	533	opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e	534	break;
cf0e5467	535	case OPT_PROBE:
7d29a247	536	opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e DG	537	break;
	538	case OPT_FUNCTION:
	539	opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b MD	540	break;
	541	case OPT_FUNCTION_ENTRY:
	542	opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e	543	break;
a54bd42d MD	544	case OPT_SYSCALL:
a54bd42d MD	545	opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199	546	break;
eeac7d46 MD	547	case OPT_USERSPACE:
eeac7d46 MD	548	opt_userspace = 1;
eeac7d46	549	break;
0cda4f28	550	case OPT_LOGLEVEL:
8005f29a	551	opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
0cda4f28 MD	552	opt_loglevel = poptGetOptArg(pc);
	553	break;
	554	case OPT_LOGLEVEL_ONLY:
8005f29a	555	opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
0cda4f28	556	opt_loglevel = poptGetOptArg(pc);
13dce3b7	557	break;
679b4943 SM	558	case OPT_LIST_OPTIONS:
679b4943 SM	559	list_cmd_options(stdout, long_options);
679b4943	560	goto end;
f3ed775e DG	561	default:
	562	usage(stderr);
	563	ret = CMD_UNDEFINED;
	564	goto end;
	565	}
	566	}
	567
	568	opt_event_list = (char*) poptGetArg(pc);
	569	if (opt_event_list == NULL && opt_enable_all == 0) {
	570	ERR("Missing event name(s).\n");
	571	usage(stderr);
ca1c3607	572	ret = CMD_ERROR;
f3ed775e DG	573	goto end;
	574	}
	575
cd80958d DG	576	if (!opt_session_name) {
	577	session_name = get_session_name();
	578	if (session_name == NULL) {
ca1c3607	579	ret = CMD_ERROR;
cd80958d DG	580	goto end;
	581	}
	582	} else {
	583	session_name = opt_session_name;
	584	}
	585
	586	ret = enable_events(session_name);
f3ed775e DG	587
f3ed775e DG	588	end:
cd80958d DG	589	if (opt_session_name == NULL) {
	590	free(session_name);
	591	}
	592
ca1c3607	593	poptFreeContext(pc);
f3ed775e DG	594	return ret;
f3ed775e DG	595	}