[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 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, "                           - 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, "    --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 */

		if (opt_kernel) {
			ev.type = opt_event_type;
			ev.name[0] = '\0';
		} else {
			ev.type = LTTNG_EVENT_TRACEPOINT;
			strcpy(ev.name, "*");
		}

		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
c399183f	30	#include "../command.h"
f3ed775e DG	31
	32	static char *opt_event_list;
	33	static int opt_event_type;
6181537c	34	static int opt_kernel;
5440dc42	35	static char *opt_session_name;
f3ed775e	36	static int opt_userspace;
eeac7d46	37	static char *opt_cmd_name;
f3ed775e DG	38	static int opt_enable_all;
f3ed775e DG	39	static pid_t opt_pid;
cf0e5467	40	static char *opt_probe;
8f0d098b MD	41	static char *opt_function;
8f0d098b MD	42	static char *opt_function_entry_symbol;
f3ed775e DG	43	static char *opt_channel_name;
	44
	45	enum {
	46	OPT_HELP = 1,
f3ed775e	47	OPT_TRACEPOINT,
cf0e5467	48	OPT_PROBE,
f3ed775e	49	OPT_FUNCTION,
8f0d098b	50	OPT_FUNCTION_ENTRY,
a54bd42d	51	OPT_SYSCALL,
eeac7d46	52	OPT_USERSPACE,
13dce3b7	53	OPT_TRACEPOINT_LOGLEVEL,
f3ed775e DG	54	};
f3ed775e DG	55
cd80958d DG	56	static struct lttng_handle *handle;
cd80958d DG	57
f3ed775e DG	58	static struct poptOption long_options[] = {
	59	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	60	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42	61	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8	62	{"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e DG	63	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
f3ed775e DG	64	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
40e9d5d3	65	{"userspace", 'u', POPT_ARG_STRING \| POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
f3ed775e DG	66	{"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
f3ed775e DG	67	{"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521	68	{"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3	69	{"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
b213d387 MD	70	#if 0
	71	/*
	72	* Currently removed from lttng kernel tracer. Removed from
	73	* lttng UI to discourage its use.
	74	*/
40e9d5d3	75	{"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
b213d387	76	#endif
7ebae521	77	{"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
13dce3b7	78	{"loglevel", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT_LOGLEVEL, 0, 0},
f3ed775e DG	79	{0, 0, 0, 0, 0, 0, 0}
	80	};
	81
	82	/*
	83	* usage
	84	*/
	85	static void usage(FILE *ofp)
	86	{
	87	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	88	fprintf(ofp, "\n");
	89	fprintf(ofp, " -h, --help Show this help\n");
5440dc42	90	fprintf(ofp, " -s, --session Apply on session name\n");
f3ed775e	91	fprintf(ofp, " -c, --channel Apply on this channel\n");
e14f64a8	92	fprintf(ofp, " -a, --all Enable all tracepoints\n");
f3ed775e DG	93	fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
f3ed775e DG	94	fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
e14f64a8 DG	95	fprintf(ofp, " If no CMD, the domain used is UST global\n");
	96	fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
	97	fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
f3ed775e DG	98	fprintf(ofp, "\n");
	99	fprintf(ofp, "Event options:\n");
	100	fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
be49af1e MD	101	fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
	102	fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
	103	fprintf(ofp, " e.g.:\n");
	104	fprintf(ofp, " \"*\"\n");
	105	fprintf(ofp, " \"app_component:na*\"\n");
13dce3b7	106	fprintf(ofp, " --loglevel Tracepoint loglevel\n");
8f0d098b	107	fprintf(ofp, " --probe [addr \| symbol \| symbol+offset]\n");
cf0e5467 MD	108	fprintf(ofp, " Dynamic probe.\n");
	109	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	110	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
8f0d098b MD	111	fprintf(ofp, " --function [addr \| symbol \| symbol+offset]\n");
	112	fprintf(ofp, " Dynamic function entry/return probe.\n");
	113	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	114	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387	115	#if 0
8f0d098b MD	116	fprintf(ofp, " --function:entry symbol\n");
8f0d098b MD	117	fprintf(ofp, " Function tracer event\n");
b213d387	118	#endif
a54bd42d	119	fprintf(ofp, " --syscall System call event\n");
f3ed775e DG	120	fprintf(ofp, "\n");
	121	}
	122
0d63dd19	123	/*
6181537c	124	* Parse probe options.
0d63dd19	125	*/
cf0e5467	126	static int parse_probe_opts(struct lttng_event ev, char opt)
0d63dd19 DG	127	{
0d63dd19 DG	128	int ret;
8ff0bbd0	129	char s_hex[19];
0d63dd19 DG	130	char name[LTTNG_SYMBOL_NAME_LEN];
	131
	132	if (opt == NULL) {
	133	ret = -1;
8f0d098b	134	goto end;
0d63dd19 DG	135	}
	136
	137	/* Check for symbol+offset */
8ff0bbd0	138	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19	139	if (ret == 2) {
7d29a247	140	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	141	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467	142	DBG("probe symbol %s", ev->attr.probe.symbol_name);
8ff0bbd0 DG	143	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	144	ERR("Invalid probe offset %s", s_hex);
0d63dd19	145	ret = -1;
8f0d098b	146	goto end;
0d63dd19	147	}
8ff0bbd0	148	ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467	149	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78	150	ev->attr.probe.addr = 0;
8f0d098b MD	151	goto end;
	152	}
	153
	154	/* Check for symbol */
	155	if (isalpha(name[0])) {
	156	ret = sscanf(opt, "%s", name);
	157	if (ret == 1) {
	158	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	159	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b MD	160	DBG("probe symbol %s", ev->attr.probe.symbol_name);
	161	ev->attr.probe.offset = 0;
	162	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
	163	ev->attr.probe.addr = 0;
	164	goto end;
	165	}
0d63dd19 DG	166	}
	167
	168	/* Check for address */
8ff0bbd0	169	ret = sscanf(opt, "%s", s_hex);
0d63dd19	170	if (ret > 0) {
8ff0bbd0 DG	171	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	172	ERR("Invalid probe address %s", s_hex);
0d63dd19	173	ret = -1;
8f0d098b	174	goto end;
0d63dd19	175	}
8ff0bbd0	176	ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467	177	DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78 DG	178	ev->attr.probe.offset = 0;
3000dc78 DG	179	memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b	180	goto end;
0d63dd19 DG	181	}
	182
	183	/* No match */
	184	ret = -1;
	185
8f0d098b	186	end:
0d63dd19 DG	187	return ret;
	188	}
	189
f3ed775e	190	/*
6181537c	191	* Enabling event using the lttng API.
f3ed775e	192	*/
cd80958d	193	static int enable_events(char *session_name)
f3ed775e DG	194	{
f3ed775e DG	195	int err, ret = CMD_SUCCESS;
b73d0b29	196	char event_name, channel_name = NULL;
f3ed775e	197	struct lttng_event ev;
7d29a247	198	struct lttng_domain dom;
f3ed775e	199
f3ed775e DG	200	if (opt_channel_name == NULL) {
	201	err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
	202	if (err < 0) {
	203	ret = CMD_FATAL;
	204	goto error;
	205	}
	206	} else {
	207	channel_name = opt_channel_name;
	208	}
	209
2bdd86d4	210	if (opt_kernel && opt_userspace) {
e14f64a8	211	ERR("Can't use -k/--kernel and -u/--userspace together");
2bdd86d4 MD	212	ret = CMD_FATAL;
	213	goto error;
	214	}
6181537c	215
7d29a247 DG	216	/* Create lttng domain */
	217	if (opt_kernel) {
	218	dom.type = LTTNG_DOMAIN_KERNEL;
6181537c DG	219	} else if (opt_pid != 0) {
	220	dom.type = LTTNG_DOMAIN_UST_PID;
	221	dom.attr.pid = opt_pid;
	222	DBG("PID %d set to lttng handle", opt_pid);
	223	} else if (opt_userspace && opt_cmd_name == NULL) {
2bdd86d4	224	dom.type = LTTNG_DOMAIN_UST;
6181537c DG	225	} else if (opt_userspace && opt_cmd_name != NULL) {
	226	dom.type = LTTNG_DOMAIN_UST_EXEC_NAME;
	227	strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX);
	228	} else {
e14f64a8	229	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
6181537c DG	230	ret = CMD_NOT_IMPLEMENTED;
6181537c DG	231	goto error;
2bdd86d4	232	}
7d29a247	233
cd80958d DG	234	handle = lttng_create_handle(session_name, &dom);
	235	if (handle == NULL) {
	236	ret = -1;
	237	goto error;
	238	}
1aef21b6	239
cd80958d	240	if (opt_enable_all) {
8c9ae521	241	/* Default setup for enable all */
75e8c5ab MD	242
	243	if (opt_kernel) {
	244	ev.type = opt_event_type;
	245	ev.name[0] = '\0';
	246	} else {
	247	ev.type = LTTNG_EVENT_TRACEPOINT;
	248	strcpy(ev.name, "*");
	249	}
8c9ae521 DG	250
	251	ret = lttng_enable_event(handle, &ev, channel_name);
	252	if (ret < 0) {
	253	goto error;
	254	}
	255
0133c199 MD	256	switch (opt_event_type) {
0133c199 MD	257	case LTTNG_EVENT_TRACEPOINT:
2bdd86d4 MD	258	MSG("All %s tracepoints are enabled in channel %s",
2bdd86d4 MD	259	opt_kernel ? "kernel" : "UST", channel_name);
0133c199	260	break;
a54bd42d	261	case LTTNG_EVENT_SYSCALL:
0133c199	262	if (opt_kernel) {
8c9ae521 DG	263	MSG("All kernel system calls are enabled in channel %s",
8c9ae521 DG	264	channel_name);
c93d9daf	265	}
0133c199	266	break;
7a3d1328	267	case LTTNG_EVENT_ALL:
2bdd86d4 MD	268	MSG("All %s events are enabled in channel %s",
2bdd86d4 MD	269	opt_kernel ? "kernel" : "UST", channel_name);
7a3d1328	270	break;
0133c199	271	default:
8c9ae521	272	/*
6181537c DG	273	* We should not be here since lttng_enable_event should have
6181537c DG	274	* failed on the event type.
8c9ae521	275	*/
f3ed775e DG	276	goto error;
f3ed775e DG	277	}
8c9ae521	278	goto end;
f3ed775e DG	279	}
	280
	281	/* Strip event list */
	282	event_name = strtok(opt_event_list, ",");
	283	while (event_name != NULL) {
6181537c DG	284	/* Copy name and type of the event */
	285	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	286	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
	287	ev.type = opt_event_type;
	288
f3ed775e DG	289	/* Kernel tracer action */
	290	if (opt_kernel) {
	291	DBG("Enabling kernel event %s for channel %s",
	292	event_name, channel_name);
f3ed775e DG	293
f3ed775e DG	294	switch (opt_event_type) {
7a3d1328 MD	295	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
	296	ev.type = LTTNG_EVENT_TRACEPOINT;
	297	/* Fall-through */
e6ddca71	298	case LTTNG_EVENT_TRACEPOINT:
f3ed775e	299	break;
7d29a247	300	case LTTNG_EVENT_PROBE:
cf0e5467	301	ret = parse_probe_opts(&ev, opt_probe);
0d63dd19	302	if (ret < 0) {
cf0e5467	303	ERR("Unable to parse probe options");
0d63dd19 DG	304	ret = 0;
	305	goto error;
	306	}
f3ed775e DG	307	break;
f3ed775e DG	308	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	309	ret = parse_probe_opts(&ev, opt_function);
	310	if (ret < 0) {
	311	ERR("Unable to parse function probe options");
	312	ret = 0;
	313	goto error;
	314	}
	315	break;
	316	case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c DG	317	strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
6181537c DG	318	LTTNG_SYMBOL_NAME_LEN);
99497cd0	319	ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e	320	break;
a54bd42d	321	case LTTNG_EVENT_SYSCALL:
6181537c DG	322	MSG("per-syscall selection not supported yet. Use \"-a\" "
6181537c DG	323	"for all syscalls.");
f3ed775e DG	324	default:
	325	ret = CMD_NOT_IMPLEMENTED;
	326	goto error;
	327	}
f3ed775e	328	} else if (opt_userspace) { /* User-space tracer action */
e14f64a8 DG	329	if (opt_cmd_name != NULL \|\| opt_pid) {
e14f64a8 DG	330	MSG("Only supporting tracing all UST processes (-u) for now.");
2bdd86d4 MD	331	ret = CMD_NOT_IMPLEMENTED;
	332	goto error;
	333	}
6181537c DG	334
	335	DBG("Enabling UST event %s for channel %s", event_name,
	336	channel_name);
2bdd86d4 MD	337
	338	switch (opt_event_type) {
	339	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4 MD	340	/* Fall-through */
2bdd86d4 MD	341	case LTTNG_EVENT_TRACEPOINT:
e4baff1e MD	342	/* Copy name and type of the event */
	343	ev.type = LTTNG_EVENT_TRACEPOINT;
	344	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	345	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4	346	break;
13dce3b7	347	case LTTNG_EVENT_TRACEPOINT_LOGLEVEL:
e4baff1e	348	/* Copy name and type of the event */
13dce3b7	349	ev.type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
e4baff1e MD	350	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
e4baff1e MD	351	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
13dce3b7	352	break;
2bdd86d4 MD	353	case LTTNG_EVENT_PROBE:
	354	case LTTNG_EVENT_FUNCTION:
	355	case LTTNG_EVENT_FUNCTION_ENTRY:
	356	case LTTNG_EVENT_SYSCALL:
	357	default:
	358	ret = CMD_NOT_IMPLEMENTED;
	359	goto error;
	360	}
f3ed775e	361	} else {
e14f64a8	362	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
f3ed775e DG	363	goto error;
	364	}
	365
6181537c DG	366	ret = lttng_enable_event(handle, &ev, channel_name);
	367	if (ret == 0) {
	368	MSG("%s event %s created in channel %s",
	369	opt_kernel ? "kernel": "UST", event_name, channel_name);
	370	}
	371
f3ed775e DG	372	/* Next event */
	373	event_name = strtok(NULL, ",");
	374	}
	375
8c9ae521	376	end:
f3ed775e	377	error:
b73d0b29 MD	378	if (opt_channel_name == NULL) {
	379	free(channel_name);
	380	}
cd80958d DG	381	lttng_destroy_handle(handle);
cd80958d DG	382
f3ed775e DG	383	return ret;
	384	}
	385
	386	/*
6181537c	387	* Add event to trace session
f3ed775e DG	388	*/
	389	int cmd_enable_events(int argc, const char **argv)
	390	{
	391	int opt, ret;
	392	static poptContext pc;
cd80958d	393	char *session_name = NULL;
f3ed775e DG	394
	395	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	396	poptReadDefaultConfig(pc, 0);
	397
	398	/* Default event type */
7a3d1328	399	opt_event_type = LTTNG_EVENT_ALL;
f3ed775e DG	400
	401	while ((opt = poptGetNextOpt(pc)) != -1) {
	402	switch (opt) {
	403	case OPT_HELP:
	404	usage(stderr);
	405	ret = CMD_SUCCESS;
	406	goto end;
f3ed775e	407	case OPT_TRACEPOINT:
e6ddca71	408	opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e	409	break;
cf0e5467	410	case OPT_PROBE:
7d29a247	411	opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e DG	412	break;
	413	case OPT_FUNCTION:
	414	opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b MD	415	break;
	416	case OPT_FUNCTION_ENTRY:
	417	opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e	418	break;
a54bd42d MD	419	case OPT_SYSCALL:
a54bd42d MD	420	opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199	421	break;
eeac7d46 MD	422	case OPT_USERSPACE:
eeac7d46 MD	423	opt_userspace = 1;
eeac7d46	424	break;
13dce3b7 MD	425	case OPT_TRACEPOINT_LOGLEVEL:
	426	opt_event_type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
	427	break;
f3ed775e DG	428	default:
	429	usage(stderr);
	430	ret = CMD_UNDEFINED;
	431	goto end;
	432	}
	433	}
	434
	435	opt_event_list = (char*) poptGetArg(pc);
	436	if (opt_event_list == NULL && opt_enable_all == 0) {
	437	ERR("Missing event name(s).\n");
	438	usage(stderr);
	439	ret = CMD_SUCCESS;
	440	goto end;
	441	}
	442
cd80958d DG	443	if (!opt_session_name) {
	444	session_name = get_session_name();
	445	if (session_name == NULL) {
	446	ret = -1;
	447	goto end;
	448	}
	449	} else {
	450	session_name = opt_session_name;
	451	}
	452
	453	ret = enable_events(session_name);
f3ed775e DG	454
f3ed775e DG	455	end:
cd80958d DG	456	if (opt_session_name == NULL) {
	457	free(session_name);
	458	}
	459
f3ed775e DG	460	return ret;
f3ed775e DG	461	}