[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, "                           - 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
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");
be49af1e MD	103	fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
	104	fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
	105	fprintf(ofp, " e.g.:\n");
	106	fprintf(ofp, " \"*\"\n");
	107	fprintf(ofp, " \"app_component:na*\"\n");
13dce3b7	108	fprintf(ofp, " --loglevel Tracepoint loglevel\n");
8f0d098b	109	fprintf(ofp, " --probe [addr \| symbol \| symbol+offset]\n");
cf0e5467 MD	110	fprintf(ofp, " Dynamic probe.\n");
	111	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	112	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
8f0d098b MD	113	fprintf(ofp, " --function [addr \| symbol \| symbol+offset]\n");
	114	fprintf(ofp, " Dynamic function entry/return probe.\n");
	115	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	116	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387	117	#if 0
8f0d098b MD	118	fprintf(ofp, " --function:entry symbol\n");
8f0d098b MD	119	fprintf(ofp, " Function tracer event\n");
b213d387	120	#endif
a54bd42d	121	fprintf(ofp, " --syscall System call event\n");
f3ed775e DG	122	fprintf(ofp, "\n");
	123	}
	124
0d63dd19	125	/*
6181537c	126	* Parse probe options.
0d63dd19	127	*/
cf0e5467	128	static int parse_probe_opts(struct lttng_event ev, char opt)
0d63dd19 DG	129	{
0d63dd19 DG	130	int ret;
8ff0bbd0	131	char s_hex[19];
0d63dd19 DG	132	char name[LTTNG_SYMBOL_NAME_LEN];
	133
	134	if (opt == NULL) {
	135	ret = -1;
8f0d098b	136	goto end;
0d63dd19 DG	137	}
	138
	139	/* Check for symbol+offset */
8ff0bbd0	140	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19	141	if (ret == 2) {
7d29a247	142	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	143	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467	144	DBG("probe symbol %s", ev->attr.probe.symbol_name);
8ff0bbd0 DG	145	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	146	ERR("Invalid probe offset %s", s_hex);
0d63dd19	147	ret = -1;
8f0d098b	148	goto end;
0d63dd19	149	}
8ff0bbd0	150	ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467	151	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78	152	ev->attr.probe.addr = 0;
8f0d098b MD	153	goto end;
	154	}
	155
	156	/* Check for symbol */
	157	if (isalpha(name[0])) {
	158	ret = sscanf(opt, "%s", name);
	159	if (ret == 1) {
	160	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	161	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b MD	162	DBG("probe symbol %s", ev->attr.probe.symbol_name);
	163	ev->attr.probe.offset = 0;
	164	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
	165	ev->attr.probe.addr = 0;
	166	goto end;
	167	}
0d63dd19 DG	168	}
	169
	170	/* Check for address */
8ff0bbd0	171	ret = sscanf(opt, "%s", s_hex);
0d63dd19	172	if (ret > 0) {
8ff0bbd0 DG	173	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	174	ERR("Invalid probe address %s", s_hex);
0d63dd19	175	ret = -1;
8f0d098b	176	goto end;
0d63dd19	177	}
8ff0bbd0	178	ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467	179	DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78 DG	180	ev->attr.probe.offset = 0;
3000dc78 DG	181	memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b	182	goto end;
0d63dd19 DG	183	}
	184
	185	/* No match */
	186	ret = -1;
	187
8f0d098b	188	end:
0d63dd19 DG	189	return ret;
	190	}
	191
f3ed775e	192	/*
6181537c	193	* Enabling event using the lttng API.
f3ed775e	194	*/
cd80958d	195	static int enable_events(char *session_name)
f3ed775e DG	196	{
f3ed775e DG	197	int err, ret = CMD_SUCCESS;
b73d0b29	198	char event_name, channel_name = NULL;
f3ed775e	199	struct lttng_event ev;
7d29a247	200	struct lttng_domain dom;
f3ed775e	201
f3ed775e DG	202	if (opt_channel_name == NULL) {
	203	err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
	204	if (err < 0) {
	205	ret = CMD_FATAL;
	206	goto error;
	207	}
	208	} else {
	209	channel_name = opt_channel_name;
	210	}
	211
2bdd86d4	212	if (opt_kernel && opt_userspace) {
e14f64a8	213	ERR("Can't use -k/--kernel and -u/--userspace together");
2bdd86d4 MD	214	ret = CMD_FATAL;
	215	goto error;
	216	}
6181537c	217
7d29a247 DG	218	/* Create lttng domain */
	219	if (opt_kernel) {
	220	dom.type = LTTNG_DOMAIN_KERNEL;
6181537c DG	221	} else if (opt_pid != 0) {
	222	dom.type = LTTNG_DOMAIN_UST_PID;
	223	dom.attr.pid = opt_pid;
	224	DBG("PID %d set to lttng handle", opt_pid);
	225	} else if (opt_userspace && opt_cmd_name == NULL) {
2bdd86d4	226	dom.type = LTTNG_DOMAIN_UST;
6181537c DG	227	} else if (opt_userspace && opt_cmd_name != NULL) {
	228	dom.type = LTTNG_DOMAIN_UST_EXEC_NAME;
	229	strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX);
	230	} else {
e14f64a8	231	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
6181537c DG	232	ret = CMD_NOT_IMPLEMENTED;
6181537c DG	233	goto error;
2bdd86d4	234	}
7d29a247	235
cd80958d DG	236	handle = lttng_create_handle(session_name, &dom);
	237	if (handle == NULL) {
	238	ret = -1;
	239	goto error;
	240	}
1aef21b6	241
cd80958d	242	if (opt_enable_all) {
8c9ae521	243	/* Default setup for enable all */
75e8c5ab MD	244
	245	if (opt_kernel) {
	246	ev.type = opt_event_type;
	247	ev.name[0] = '\0';
	248	} else {
	249	ev.type = LTTNG_EVENT_TRACEPOINT;
	250	strcpy(ev.name, "*");
	251	}
8c9ae521 DG	252
	253	ret = lttng_enable_event(handle, &ev, channel_name);
	254	if (ret < 0) {
	255	goto error;
	256	}
	257
0133c199 MD	258	switch (opt_event_type) {
0133c199 MD	259	case LTTNG_EVENT_TRACEPOINT:
2bdd86d4 MD	260	MSG("All %s tracepoints are enabled in channel %s",
2bdd86d4 MD	261	opt_kernel ? "kernel" : "UST", channel_name);
0133c199	262	break;
a54bd42d	263	case LTTNG_EVENT_SYSCALL:
0133c199	264	if (opt_kernel) {
8c9ae521 DG	265	MSG("All kernel system calls are enabled in channel %s",
8c9ae521 DG	266	channel_name);
c93d9daf	267	}
0133c199	268	break;
7a3d1328	269	case LTTNG_EVENT_ALL:
2bdd86d4 MD	270	MSG("All %s events are enabled in channel %s",
2bdd86d4 MD	271	opt_kernel ? "kernel" : "UST", channel_name);
7a3d1328	272	break;
0133c199	273	default:
8c9ae521	274	/*
6181537c DG	275	* We should not be here since lttng_enable_event should have
6181537c DG	276	* failed on the event type.
8c9ae521	277	*/
f3ed775e DG	278	goto error;
f3ed775e DG	279	}
8c9ae521	280	goto end;
f3ed775e DG	281	}
	282
	283	/* Strip event list */
	284	event_name = strtok(opt_event_list, ",");
	285	while (event_name != NULL) {
6181537c DG	286	/* Copy name and type of the event */
	287	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	288	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
	289	ev.type = opt_event_type;
	290
f3ed775e DG	291	/* Kernel tracer action */
	292	if (opt_kernel) {
	293	DBG("Enabling kernel event %s for channel %s",
	294	event_name, channel_name);
f3ed775e DG	295
f3ed775e DG	296	switch (opt_event_type) {
7a3d1328 MD	297	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
	298	ev.type = LTTNG_EVENT_TRACEPOINT;
	299	/* Fall-through */
e6ddca71	300	case LTTNG_EVENT_TRACEPOINT:
f3ed775e	301	break;
7d29a247	302	case LTTNG_EVENT_PROBE:
cf0e5467	303	ret = parse_probe_opts(&ev, opt_probe);
0d63dd19	304	if (ret < 0) {
cf0e5467	305	ERR("Unable to parse probe options");
0d63dd19 DG	306	ret = 0;
	307	goto error;
	308	}
f3ed775e DG	309	break;
f3ed775e DG	310	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	311	ret = parse_probe_opts(&ev, opt_function);
	312	if (ret < 0) {
	313	ERR("Unable to parse function probe options");
	314	ret = 0;
	315	goto error;
	316	}
	317	break;
	318	case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c DG	319	strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
6181537c DG	320	LTTNG_SYMBOL_NAME_LEN);
99497cd0	321	ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e	322	break;
a54bd42d	323	case LTTNG_EVENT_SYSCALL:
6181537c DG	324	MSG("per-syscall selection not supported yet. Use \"-a\" "
6181537c DG	325	"for all syscalls.");
f3ed775e DG	326	default:
	327	ret = CMD_NOT_IMPLEMENTED;
	328	goto error;
	329	}
f3ed775e	330	} else if (opt_userspace) { /* User-space tracer action */
e14f64a8 DG	331	if (opt_cmd_name != NULL \|\| opt_pid) {
e14f64a8 DG	332	MSG("Only supporting tracing all UST processes (-u) for now.");
2bdd86d4 MD	333	ret = CMD_NOT_IMPLEMENTED;
	334	goto error;
	335	}
6181537c DG	336
	337	DBG("Enabling UST event %s for channel %s", event_name,
	338	channel_name);
2bdd86d4 MD	339
	340	switch (opt_event_type) {
	341	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4 MD	342	/* Fall-through */
2bdd86d4 MD	343	case LTTNG_EVENT_TRACEPOINT:
e4baff1e MD	344	/* Copy name and type of the event */
	345	ev.type = LTTNG_EVENT_TRACEPOINT;
	346	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	347	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4	348	break;
13dce3b7	349	case LTTNG_EVENT_TRACEPOINT_LOGLEVEL:
e4baff1e	350	/* Copy name and type of the event */
13dce3b7	351	ev.type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
e4baff1e MD	352	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
e4baff1e MD	353	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
13dce3b7	354	break;
2bdd86d4 MD	355	case LTTNG_EVENT_PROBE:
	356	case LTTNG_EVENT_FUNCTION:
	357	case LTTNG_EVENT_FUNCTION_ENTRY:
	358	case LTTNG_EVENT_SYSCALL:
	359	default:
	360	ret = CMD_NOT_IMPLEMENTED;
	361	goto error;
	362	}
f3ed775e	363	} else {
e14f64a8	364	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
f3ed775e DG	365	goto error;
	366	}
	367
6181537c DG	368	ret = lttng_enable_event(handle, &ev, channel_name);
	369	if (ret == 0) {
	370	MSG("%s event %s created in channel %s",
	371	opt_kernel ? "kernel": "UST", event_name, channel_name);
	372	}
	373
f3ed775e DG	374	/* Next event */
	375	event_name = strtok(NULL, ",");
	376	}
	377
8c9ae521	378	end:
f3ed775e	379	error:
b73d0b29 MD	380	if (opt_channel_name == NULL) {
	381	free(channel_name);
	382	}
cd80958d DG	383	lttng_destroy_handle(handle);
cd80958d DG	384
f3ed775e DG	385	return ret;
	386	}
	387
	388	/*
6181537c	389	* Add event to trace session
f3ed775e DG	390	*/
	391	int cmd_enable_events(int argc, const char **argv)
	392	{
	393	int opt, ret;
	394	static poptContext pc;
cd80958d	395	char *session_name = NULL;
f3ed775e DG	396
	397	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	398	poptReadDefaultConfig(pc, 0);
	399
	400	/* Default event type */
7a3d1328	401	opt_event_type = LTTNG_EVENT_ALL;
f3ed775e DG	402
	403	while ((opt = poptGetNextOpt(pc)) != -1) {
	404	switch (opt) {
	405	case OPT_HELP:
	406	usage(stderr);
	407	ret = CMD_SUCCESS;
	408	goto end;
f3ed775e	409	case OPT_TRACEPOINT:
e6ddca71	410	opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e	411	break;
cf0e5467	412	case OPT_PROBE:
7d29a247	413	opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e DG	414	break;
	415	case OPT_FUNCTION:
	416	opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b MD	417	break;
	418	case OPT_FUNCTION_ENTRY:
	419	opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e	420	break;
a54bd42d MD	421	case OPT_SYSCALL:
a54bd42d MD	422	opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199	423	break;
eeac7d46 MD	424	case OPT_USERSPACE:
eeac7d46 MD	425	opt_userspace = 1;
eeac7d46	426	break;
13dce3b7 MD	427	case OPT_TRACEPOINT_LOGLEVEL:
	428	opt_event_type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
	429	break;
f3ed775e DG	430	default:
	431	usage(stderr);
	432	ret = CMD_UNDEFINED;
	433	goto end;
	434	}
	435	}
	436
	437	opt_event_list = (char*) poptGetArg(pc);
	438	if (opt_event_list == NULL && opt_enable_all == 0) {
	439	ERR("Missing event name(s).\n");
	440	usage(stderr);
	441	ret = CMD_SUCCESS;
	442	goto end;
	443	}
	444
cd80958d DG	445	if (!opt_session_name) {
	446	session_name = get_session_name();
	447	if (session_name == NULL) {
	448	ret = -1;
	449	goto end;
	450	}
	451	} else {
	452	session_name = opt_session_name;
	453	}
	454
	455	ret = enable_events(session_name);
f3ed775e DG	456
f3ed775e DG	457	end:
cd80958d DG	458	if (opt_session_name == NULL) {
	459	free(session_name);
	460	}
	461
f3ed775e DG	462	return ret;
f3ed775e DG	463	}