[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 int opt_kernel;
static char *opt_session_name;
static int opt_userspace;
static char *opt_cmd_name;
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_TRACEPOINT,
	OPT_PROBE,
	OPT_FUNCTION,
	OPT_FUNCTION_ENTRY,
	OPT_SYSCALL,
	OPT_USERSPACE,
	OPT_TRACEPOINT_LOGLEVEL,
};

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},
	{"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},
	{"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_NONE, 0, OPT_TRACEPOINT_LOGLEVEL, 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                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, "                           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");
	fprintf(ofp, "\n");
	fprintf(ofp, "Event options:\n");
	fprintf(ofp, "    --tracepoint           Tracepoint event (default)\n");
	fprintf(ofp, "    --loglevel             Tracepoint loglevel\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");
}

/*
 * 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;
}

/*
 * 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;
	}

	if (opt_kernel && opt_userspace) {
		ERR("Can't use -k/--kernel and -u/--userspace together");
		ret = CMD_FATAL;
		goto error;
	}

	/* Create lttng domain */
	if (opt_kernel) {
		dom.type = LTTNG_DOMAIN_KERNEL;
	} else if (opt_pid != 0) {
		dom.type = LTTNG_DOMAIN_UST_PID;
		dom.attr.pid = opt_pid;
		DBG("PID %d set to lttng handle", opt_pid);
	} else if (opt_userspace && opt_cmd_name == NULL) {
		dom.type = LTTNG_DOMAIN_UST;
	} else if (opt_userspace && opt_cmd_name != NULL) {
		dom.type = LTTNG_DOMAIN_UST_EXEC_NAME;
		strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX);
	} else {
		ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
		ret = CMD_NOT_IMPLEMENTED;
		goto error;
	}

	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:
			MSG("All %s tracepoints are enabled in channel %s",
				opt_kernel ? "kernel" : "UST", 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:
			MSG("All %s events are enabled in channel %s",
				opt_kernel ? "kernel" : "UST", channel_name);
			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_NOT_IMPLEMENTED;
				goto error;
			}
		} else if (opt_userspace) {		/* User-space tracer action */
			if (opt_cmd_name != NULL || opt_pid) {
				MSG("Only supporting tracing all UST processes (-u) for now.");
				ret = CMD_NOT_IMPLEMENTED;
				goto error;
			}

			DBG("Enabling UST event %s for channel %s", event_name,
					channel_name);

			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_TRACEPOINT_LOGLEVEL:
				/* Copy name and type of the event */
				ev.type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
				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:
				ret = CMD_NOT_IMPLEMENTED;
				goto error;
			}
		} else {
			ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
			goto error;
		}

		ret = lttng_enable_event(handle, &ev, channel_name);
		if (ret == 0) {
			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 (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;
	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_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_TRACEPOINT_LOGLEVEL:
			opt_event_type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
			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;
6181537c	36	static int opt_kernel;
5440dc42	37	static char *opt_session_name;
f3ed775e	38	static int opt_userspace;
eeac7d46	39	static char *opt_cmd_name;
f3ed775e DG	40	static int opt_enable_all;
f3ed775e DG	41	static pid_t opt_pid;
cf0e5467	42	static char *opt_probe;
8f0d098b MD	43	static char *opt_function;
8f0d098b MD	44	static char *opt_function_entry_symbol;
f3ed775e DG	45	static char *opt_channel_name;
	46
	47	enum {
	48	OPT_HELP = 1,
f3ed775e	49	OPT_TRACEPOINT,
cf0e5467	50	OPT_PROBE,
f3ed775e	51	OPT_FUNCTION,
8f0d098b	52	OPT_FUNCTION_ENTRY,
a54bd42d	53	OPT_SYSCALL,
eeac7d46	54	OPT_USERSPACE,
13dce3b7	55	OPT_TRACEPOINT_LOGLEVEL,
f3ed775e DG	56	};
f3ed775e DG	57
cd80958d DG	58	static struct lttng_handle *handle;
cd80958d DG	59
f3ed775e DG	60	static struct poptOption long_options[] = {
	61	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	62	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42	63	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8	64	{"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e DG	65	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
f3ed775e DG	66	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
40e9d5d3	67	{"userspace", 'u', POPT_ARG_STRING \| POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
f3ed775e DG	68	{"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
f3ed775e DG	69	{"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521	70	{"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3	71	{"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
b213d387 MD	72	#if 0
	73	/*
	74	* Currently removed from lttng kernel tracer. Removed from
	75	* lttng UI to discourage its use.
	76	*/
40e9d5d3	77	{"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
b213d387	78	#endif
7ebae521	79	{"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
13dce3b7	80	{"loglevel", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT_LOGLEVEL, 0, 0},
f3ed775e DG	81	{0, 0, 0, 0, 0, 0, 0}
	82	};
	83
	84	/*
	85	* usage
	86	*/
	87	static void usage(FILE *ofp)
	88	{
	89	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	90	fprintf(ofp, "\n");
	91	fprintf(ofp, " -h, --help Show this help\n");
5440dc42	92	fprintf(ofp, " -s, --session Apply on session name\n");
f3ed775e	93	fprintf(ofp, " -c, --channel Apply on this channel\n");
e14f64a8	94	fprintf(ofp, " -a, --all Enable all tracepoints\n");
f3ed775e DG	95	fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
f3ed775e DG	96	fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
e14f64a8 DG	97	fprintf(ofp, " If no CMD, the domain used is UST global\n");
	98	fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
	99	fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
f3ed775e DG	100	fprintf(ofp, "\n");
	101	fprintf(ofp, "Event options:\n");
	102	fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
13dce3b7	103	fprintf(ofp, " --loglevel Tracepoint loglevel\n");
8f0d098b	104	fprintf(ofp, " --probe [addr \| symbol \| symbol+offset]\n");
cf0e5467 MD	105	fprintf(ofp, " Dynamic probe.\n");
	106	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	107	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
8f0d098b MD	108	fprintf(ofp, " --function [addr \| symbol \| symbol+offset]\n");
	109	fprintf(ofp, " Dynamic function entry/return probe.\n");
	110	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	111	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387	112	#if 0
8f0d098b MD	113	fprintf(ofp, " --function:entry symbol\n");
8f0d098b MD	114	fprintf(ofp, " Function tracer event\n");
b213d387	115	#endif
a54bd42d	116	fprintf(ofp, " --syscall System call event\n");
f3ed775e DG	117	fprintf(ofp, "\n");
	118	}
	119
0d63dd19	120	/*
6181537c	121	* Parse probe options.
0d63dd19	122	*/
cf0e5467	123	static int parse_probe_opts(struct lttng_event ev, char opt)
0d63dd19 DG	124	{
0d63dd19 DG	125	int ret;
8ff0bbd0	126	char s_hex[19];
0d63dd19 DG	127	char name[LTTNG_SYMBOL_NAME_LEN];
	128
	129	if (opt == NULL) {
	130	ret = -1;
8f0d098b	131	goto end;
0d63dd19 DG	132	}
	133
	134	/* Check for symbol+offset */
8ff0bbd0	135	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19	136	if (ret == 2) {
7d29a247	137	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	138	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467	139	DBG("probe symbol %s", ev->attr.probe.symbol_name);
8ff0bbd0 DG	140	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	141	ERR("Invalid probe offset %s", s_hex);
0d63dd19	142	ret = -1;
8f0d098b	143	goto end;
0d63dd19	144	}
8ff0bbd0	145	ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467	146	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78	147	ev->attr.probe.addr = 0;
8f0d098b MD	148	goto end;
	149	}
	150
	151	/* Check for symbol */
	152	if (isalpha(name[0])) {
	153	ret = sscanf(opt, "%s", name);
	154	if (ret == 1) {
	155	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	156	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b MD	157	DBG("probe symbol %s", ev->attr.probe.symbol_name);
	158	ev->attr.probe.offset = 0;
	159	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
	160	ev->attr.probe.addr = 0;
	161	goto end;
	162	}
0d63dd19 DG	163	}
	164
	165	/* Check for address */
8ff0bbd0	166	ret = sscanf(opt, "%s", s_hex);
0d63dd19	167	if (ret > 0) {
8ff0bbd0 DG	168	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	169	ERR("Invalid probe address %s", s_hex);
0d63dd19	170	ret = -1;
8f0d098b	171	goto end;
0d63dd19	172	}
8ff0bbd0	173	ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467	174	DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78 DG	175	ev->attr.probe.offset = 0;
3000dc78 DG	176	memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b	177	goto end;
0d63dd19 DG	178	}
	179
	180	/* No match */
	181	ret = -1;
	182
8f0d098b	183	end:
0d63dd19 DG	184	return ret;
	185	}
	186
f3ed775e	187	/*
6181537c	188	* Enabling event using the lttng API.
f3ed775e	189	*/
cd80958d	190	static int enable_events(char *session_name)
f3ed775e DG	191	{
f3ed775e DG	192	int err, ret = CMD_SUCCESS;
b73d0b29	193	char event_name, channel_name = NULL;
f3ed775e	194	struct lttng_event ev;
7d29a247	195	struct lttng_domain dom;
f3ed775e	196
f3ed775e DG	197	if (opt_channel_name == NULL) {
	198	err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
	199	if (err < 0) {
	200	ret = CMD_FATAL;
	201	goto error;
	202	}
	203	} else {
	204	channel_name = opt_channel_name;
	205	}
	206
2bdd86d4	207	if (opt_kernel && opt_userspace) {
e14f64a8	208	ERR("Can't use -k/--kernel and -u/--userspace together");
2bdd86d4 MD	209	ret = CMD_FATAL;
	210	goto error;
	211	}
6181537c	212
7d29a247 DG	213	/* Create lttng domain */
	214	if (opt_kernel) {
	215	dom.type = LTTNG_DOMAIN_KERNEL;
6181537c DG	216	} else if (opt_pid != 0) {
	217	dom.type = LTTNG_DOMAIN_UST_PID;
	218	dom.attr.pid = opt_pid;
	219	DBG("PID %d set to lttng handle", opt_pid);
	220	} else if (opt_userspace && opt_cmd_name == NULL) {
2bdd86d4	221	dom.type = LTTNG_DOMAIN_UST;
6181537c DG	222	} else if (opt_userspace && opt_cmd_name != NULL) {
	223	dom.type = LTTNG_DOMAIN_UST_EXEC_NAME;
	224	strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX);
	225	} else {
e14f64a8	226	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
6181537c DG	227	ret = CMD_NOT_IMPLEMENTED;
6181537c DG	228	goto error;
2bdd86d4	229	}
7d29a247	230
cd80958d DG	231	handle = lttng_create_handle(session_name, &dom);
	232	if (handle == NULL) {
	233	ret = -1;
	234	goto error;
	235	}
1aef21b6	236
cd80958d	237	if (opt_enable_all) {
8c9ae521 DG	238	/* Default setup for enable all */
	239	ev.name[0] = '\0';
	240	ev.type = opt_event_type;
	241
	242	ret = lttng_enable_event(handle, &ev, channel_name);
	243	if (ret < 0) {
	244	goto error;
	245	}
	246
0133c199 MD	247	switch (opt_event_type) {
0133c199 MD	248	case LTTNG_EVENT_TRACEPOINT:
2bdd86d4 MD	249	MSG("All %s tracepoints are enabled in channel %s",
2bdd86d4 MD	250	opt_kernel ? "kernel" : "UST", channel_name);
0133c199	251	break;
a54bd42d	252	case LTTNG_EVENT_SYSCALL:
0133c199	253	if (opt_kernel) {
8c9ae521 DG	254	MSG("All kernel system calls are enabled in channel %s",
8c9ae521 DG	255	channel_name);
c93d9daf	256	}
0133c199	257	break;
7a3d1328	258	case LTTNG_EVENT_ALL:
2bdd86d4 MD	259	MSG("All %s events are enabled in channel %s",
2bdd86d4 MD	260	opt_kernel ? "kernel" : "UST", channel_name);
7a3d1328	261	break;
0133c199	262	default:
8c9ae521	263	/*
6181537c DG	264	* We should not be here since lttng_enable_event should have
6181537c DG	265	* failed on the event type.
8c9ae521	266	*/
f3ed775e DG	267	goto error;
f3ed775e DG	268	}
8c9ae521	269	goto end;
f3ed775e DG	270	}
	271
	272	/* Strip event list */
	273	event_name = strtok(opt_event_list, ",");
	274	while (event_name != NULL) {
6181537c DG	275	/* Copy name and type of the event */
	276	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	277	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
	278	ev.type = opt_event_type;
	279
f3ed775e DG	280	/* Kernel tracer action */
	281	if (opt_kernel) {
	282	DBG("Enabling kernel event %s for channel %s",
	283	event_name, channel_name);
f3ed775e DG	284
f3ed775e DG	285	switch (opt_event_type) {
7a3d1328 MD	286	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
	287	ev.type = LTTNG_EVENT_TRACEPOINT;
	288	/* Fall-through */
e6ddca71	289	case LTTNG_EVENT_TRACEPOINT:
f3ed775e	290	break;
7d29a247	291	case LTTNG_EVENT_PROBE:
cf0e5467	292	ret = parse_probe_opts(&ev, opt_probe);
0d63dd19	293	if (ret < 0) {
cf0e5467	294	ERR("Unable to parse probe options");
0d63dd19 DG	295	ret = 0;
	296	goto error;
	297	}
f3ed775e DG	298	break;
f3ed775e DG	299	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	300	ret = parse_probe_opts(&ev, opt_function);
	301	if (ret < 0) {
	302	ERR("Unable to parse function probe options");
	303	ret = 0;
	304	goto error;
	305	}
	306	break;
	307	case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c DG	308	strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
6181537c DG	309	LTTNG_SYMBOL_NAME_LEN);
99497cd0	310	ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e	311	break;
a54bd42d	312	case LTTNG_EVENT_SYSCALL:
6181537c DG	313	MSG("per-syscall selection not supported yet. Use \"-a\" "
6181537c DG	314	"for all syscalls.");
f3ed775e DG	315	default:
	316	ret = CMD_NOT_IMPLEMENTED;
	317	goto error;
	318	}
f3ed775e	319	} else if (opt_userspace) { /* User-space tracer action */
e14f64a8 DG	320	if (opt_cmd_name != NULL \|\| opt_pid) {
e14f64a8 DG	321	MSG("Only supporting tracing all UST processes (-u) for now.");
2bdd86d4 MD	322	ret = CMD_NOT_IMPLEMENTED;
	323	goto error;
	324	}
6181537c DG	325
	326	DBG("Enabling UST event %s for channel %s", event_name,
	327	channel_name);
2bdd86d4 MD	328
	329	switch (opt_event_type) {
	330	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4 MD	331	/* Fall-through */
2bdd86d4 MD	332	case LTTNG_EVENT_TRACEPOINT:
e4baff1e MD	333	/* Copy name and type of the event */
	334	ev.type = LTTNG_EVENT_TRACEPOINT;
	335	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	336	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4	337	break;
13dce3b7	338	case LTTNG_EVENT_TRACEPOINT_LOGLEVEL:
e4baff1e	339	/* Copy name and type of the event */
13dce3b7	340	ev.type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
e4baff1e MD	341	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
e4baff1e MD	342	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
13dce3b7	343	break;
2bdd86d4 MD	344	case LTTNG_EVENT_PROBE:
	345	case LTTNG_EVENT_FUNCTION:
	346	case LTTNG_EVENT_FUNCTION_ENTRY:
	347	case LTTNG_EVENT_SYSCALL:
	348	default:
	349	ret = CMD_NOT_IMPLEMENTED;
	350	goto error;
	351	}
f3ed775e	352	} else {
e14f64a8	353	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
f3ed775e DG	354	goto error;
	355	}
	356
6181537c DG	357	ret = lttng_enable_event(handle, &ev, channel_name);
	358	if (ret == 0) {
	359	MSG("%s event %s created in channel %s",
	360	opt_kernel ? "kernel": "UST", event_name, channel_name);
	361	}
	362
f3ed775e DG	363	/* Next event */
	364	event_name = strtok(NULL, ",");
	365	}
	366
8c9ae521	367	end:
f3ed775e	368	error:
b73d0b29 MD	369	if (opt_channel_name == NULL) {
	370	free(channel_name);
	371	}
cd80958d DG	372	lttng_destroy_handle(handle);
cd80958d DG	373
f3ed775e DG	374	return ret;
	375	}
	376
	377	/*
6181537c	378	* Add event to trace session
f3ed775e DG	379	*/
	380	int cmd_enable_events(int argc, const char **argv)
	381	{
	382	int opt, ret;
	383	static poptContext pc;
cd80958d	384	char *session_name = NULL;
f3ed775e DG	385
	386	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	387	poptReadDefaultConfig(pc, 0);
	388
	389	/* Default event type */
7a3d1328	390	opt_event_type = LTTNG_EVENT_ALL;
f3ed775e DG	391
	392	while ((opt = poptGetNextOpt(pc)) != -1) {
	393	switch (opt) {
	394	case OPT_HELP:
	395	usage(stderr);
	396	ret = CMD_SUCCESS;
	397	goto end;
f3ed775e	398	case OPT_TRACEPOINT:
e6ddca71	399	opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e	400	break;
cf0e5467	401	case OPT_PROBE:
7d29a247	402	opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e DG	403	break;
	404	case OPT_FUNCTION:
	405	opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b MD	406	break;
	407	case OPT_FUNCTION_ENTRY:
	408	opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e	409	break;
a54bd42d MD	410	case OPT_SYSCALL:
a54bd42d MD	411	opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199	412	break;
eeac7d46 MD	413	case OPT_USERSPACE:
eeac7d46 MD	414	opt_userspace = 1;
eeac7d46	415	break;
13dce3b7 MD	416	case OPT_TRACEPOINT_LOGLEVEL:
	417	opt_event_type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
	418	break;
f3ed775e DG	419	default:
	420	usage(stderr);
	421	ret = CMD_UNDEFINED;
	422	goto end;
	423	}
	424	}
	425
	426	opt_event_list = (char*) poptGetArg(pc);
	427	if (opt_event_list == NULL && opt_enable_all == 0) {
	428	ERR("Missing event name(s).\n");
	429	usage(stderr);
	430	ret = CMD_SUCCESS;
	431	goto end;
	432	}
	433
cd80958d DG	434	if (!opt_session_name) {
	435	session_name = get_session_name();
	436	if (session_name == NULL) {
	437	ret = -1;
	438	goto end;
	439	}
	440	} else {
	441	session_name = opt_session_name;
	442	}
	443
	444	ret = enable_events(session_name);
f3ed775e DG	445
f3ed775e DG	446	end:
cd80958d DG	447	if (opt_session_name == NULL) {
	448	free(session_name);
	449	}
	450
f3ed775e DG	451	return ret;
f3ed775e DG	452	}