[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_pid_all;
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-events",     'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
	{"channel",        'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
	{"kernel",         'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
	{"userspace",      'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
	{"all",            0,   POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
	{"pid",            'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
	{"tracepoint",     0,   POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
	{"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-events         Enable all tracepoints\n");
	fprintf(ofp, "  -k, --kernel             Apply for the kernel tracer\n");
	fprintf(ofp, "  -u, --userspace [CMD]    Apply for the user-space tracer\n");
	fprintf(ofp, "      --all                If -u, apply on all traceable apps\n");
	fprintf(ofp, "  -p, --pid PID            If -u, apply on a specific PID\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "Event options:\n");
	fprintf(ofp, "    --tracepoint           Tracepoint event (default)\n");
	fprintf(ofp, "    --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) {
		MSG("Choose only one of --kernel or --userspace");
		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 (--kernel or --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_pid_all) {
				MSG("Only supporting tracing all UST processes "
						"(-u --all) 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 */
				ev.type = LTTNG_EVENT_TRACEPOINT;
				/* Fall-through */
			case LTTNG_EVENT_TRACEPOINT:
				break;
			case LTTNG_EVENT_TRACEPOINT_LOGLEVEL:
				ev.type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
				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 (--kernel or --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 DG	38	static int opt_pid_all;
f3ed775e DG	39	static int opt_userspace;
eeac7d46	40	static char *opt_cmd_name;
f3ed775e DG	41	static int opt_enable_all;
f3ed775e DG	42	static pid_t opt_pid;
cf0e5467	43	static char *opt_probe;
8f0d098b MD	44	static char *opt_function;
8f0d098b MD	45	static char *opt_function_entry_symbol;
f3ed775e DG	46	static char *opt_channel_name;
	47
	48	enum {
	49	OPT_HELP = 1,
f3ed775e	50	OPT_TRACEPOINT,
cf0e5467	51	OPT_PROBE,
f3ed775e	52	OPT_FUNCTION,
8f0d098b	53	OPT_FUNCTION_ENTRY,
a54bd42d	54	OPT_SYSCALL,
eeac7d46	55	OPT_USERSPACE,
13dce3b7	56	OPT_TRACEPOINT_LOGLEVEL,
f3ed775e DG	57	};
f3ed775e DG	58
cd80958d DG	59	static struct lttng_handle *handle;
cd80958d DG	60
f3ed775e DG	61	static struct poptOption long_options[] = {
	62	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	63	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42	64	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
f3ed775e DG	65	{"all-events", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
	66	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
	67	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
40e9d5d3	68	{"userspace", 'u', POPT_ARG_STRING \| POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
f3ed775e DG	69	{"all", 0, POPT_ARG_VAL, &opt_pid_all, 1, 0, 0},
	70	{"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
	71	{"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521	72	{"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3	73	{"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
b213d387 MD	74	#if 0
	75	/*
	76	* Currently removed from lttng kernel tracer. Removed from
	77	* lttng UI to discourage its use.
	78	*/
40e9d5d3	79	{"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
b213d387	80	#endif
7ebae521	81	{"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
13dce3b7	82	{"loglevel", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT_LOGLEVEL, 0, 0},
f3ed775e DG	83	{0, 0, 0, 0, 0, 0, 0}
	84	};
	85
	86	/*
	87	* usage
	88	*/
	89	static void usage(FILE *ofp)
	90	{
	91	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	92	fprintf(ofp, "\n");
	93	fprintf(ofp, " -h, --help Show this help\n");
5440dc42	94	fprintf(ofp, " -s, --session Apply on session name\n");
f3ed775e DG	95	fprintf(ofp, " -c, --channel Apply on this channel\n");
	96	fprintf(ofp, " -a, --all-events Enable all tracepoints\n");
	97	fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
	98	fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
	99	fprintf(ofp, " --all If -u, apply on all traceable apps\n");
	100	fprintf(ofp, " -p, --pid PID If -u, apply on a specific PID\n");
	101	fprintf(ofp, "\n");
	102	fprintf(ofp, "Event options:\n");
	103	fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
13dce3b7	104	fprintf(ofp, " --loglevel Tracepoint loglevel\n");
8f0d098b	105	fprintf(ofp, " --probe [addr \| symbol \| symbol+offset]\n");
cf0e5467 MD	106	fprintf(ofp, " Dynamic probe.\n");
	107	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	108	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
8f0d098b MD	109	fprintf(ofp, " --function [addr \| symbol \| symbol+offset]\n");
	110	fprintf(ofp, " Dynamic function entry/return probe.\n");
	111	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	112	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387	113	#if 0
8f0d098b MD	114	fprintf(ofp, " --function:entry symbol\n");
8f0d098b MD	115	fprintf(ofp, " Function tracer event\n");
b213d387	116	#endif
a54bd42d	117	fprintf(ofp, " --syscall System call event\n");
f3ed775e DG	118	fprintf(ofp, "\n");
	119	}
	120
0d63dd19	121	/*
6181537c	122	* Parse probe options.
0d63dd19	123	*/
cf0e5467	124	static int parse_probe_opts(struct lttng_event ev, char opt)
0d63dd19 DG	125	{
0d63dd19 DG	126	int ret;
8ff0bbd0	127	char s_hex[19];
0d63dd19 DG	128	char name[LTTNG_SYMBOL_NAME_LEN];
	129
	130	if (opt == NULL) {
	131	ret = -1;
8f0d098b	132	goto end;
0d63dd19 DG	133	}
	134
	135	/* Check for symbol+offset */
8ff0bbd0	136	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19	137	if (ret == 2) {
7d29a247	138	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	139	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467	140	DBG("probe symbol %s", ev->attr.probe.symbol_name);
8ff0bbd0 DG	141	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	142	ERR("Invalid probe offset %s", s_hex);
0d63dd19	143	ret = -1;
8f0d098b	144	goto end;
0d63dd19	145	}
8ff0bbd0	146	ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467	147	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78	148	ev->attr.probe.addr = 0;
8f0d098b MD	149	goto end;
	150	}
	151
	152	/* Check for symbol */
	153	if (isalpha(name[0])) {
	154	ret = sscanf(opt, "%s", name);
	155	if (ret == 1) {
	156	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	157	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b MD	158	DBG("probe symbol %s", ev->attr.probe.symbol_name);
	159	ev->attr.probe.offset = 0;
	160	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
	161	ev->attr.probe.addr = 0;
	162	goto end;
	163	}
0d63dd19 DG	164	}
	165
	166	/* Check for address */
8ff0bbd0	167	ret = sscanf(opt, "%s", s_hex);
0d63dd19	168	if (ret > 0) {
8ff0bbd0 DG	169	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	170	ERR("Invalid probe address %s", s_hex);
0d63dd19	171	ret = -1;
8f0d098b	172	goto end;
0d63dd19	173	}
8ff0bbd0	174	ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467	175	DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78 DG	176	ev->attr.probe.offset = 0;
3000dc78 DG	177	memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b	178	goto end;
0d63dd19 DG	179	}
	180
	181	/* No match */
	182	ret = -1;
	183
8f0d098b	184	end:
0d63dd19 DG	185	return ret;
	186	}
	187
f3ed775e	188	/*
6181537c	189	* Enabling event using the lttng API.
f3ed775e	190	*/
cd80958d	191	static int enable_events(char *session_name)
f3ed775e DG	192	{
f3ed775e DG	193	int err, ret = CMD_SUCCESS;
b73d0b29	194	char event_name, channel_name = NULL;
f3ed775e	195	struct lttng_event ev;
7d29a247	196	struct lttng_domain dom;
f3ed775e	197
f3ed775e DG	198	if (opt_channel_name == NULL) {
	199	err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
	200	if (err < 0) {
	201	ret = CMD_FATAL;
	202	goto error;
	203	}
	204	} else {
	205	channel_name = opt_channel_name;
	206	}
	207
2bdd86d4 MD	208	if (opt_kernel && opt_userspace) {
	209	MSG("Choose only one of --kernel or --userspace");
	210	ret = CMD_FATAL;
	211	goto error;
	212	}
6181537c	213
7d29a247 DG	214	/* Create lttng domain */
	215	if (opt_kernel) {
	216	dom.type = LTTNG_DOMAIN_KERNEL;
6181537c DG	217	} else if (opt_pid != 0) {
	218	dom.type = LTTNG_DOMAIN_UST_PID;
	219	dom.attr.pid = opt_pid;
	220	DBG("PID %d set to lttng handle", opt_pid);
	221	} else if (opt_userspace && opt_cmd_name == NULL) {
2bdd86d4	222	dom.type = LTTNG_DOMAIN_UST;
6181537c DG	223	} else if (opt_userspace && opt_cmd_name != NULL) {
	224	dom.type = LTTNG_DOMAIN_UST_EXEC_NAME;
	225	strncpy(dom.attr.exec_name, opt_cmd_name, NAME_MAX);
	226	} else {
	227	ERR("Please specify a tracer (--kernel or --userspace)");
	228	ret = CMD_NOT_IMPLEMENTED;
	229	goto error;
2bdd86d4	230	}
7d29a247	231
cd80958d DG	232	handle = lttng_create_handle(session_name, &dom);
	233	if (handle == NULL) {
	234	ret = -1;
	235	goto error;
	236	}
1aef21b6	237
cd80958d	238	if (opt_enable_all) {
8c9ae521 DG	239	/* Default setup for enable all */
	240	ev.name[0] = '\0';
	241	ev.type = opt_event_type;
	242
	243	ret = lttng_enable_event(handle, &ev, channel_name);
	244	if (ret < 0) {
	245	goto error;
	246	}
	247
0133c199 MD	248	switch (opt_event_type) {
0133c199 MD	249	case LTTNG_EVENT_TRACEPOINT:
2bdd86d4 MD	250	MSG("All %s tracepoints are enabled in channel %s",
2bdd86d4 MD	251	opt_kernel ? "kernel" : "UST", channel_name);
0133c199	252	break;
a54bd42d	253	case LTTNG_EVENT_SYSCALL:
0133c199	254	if (opt_kernel) {
8c9ae521 DG	255	MSG("All kernel system calls are enabled in channel %s",
8c9ae521 DG	256	channel_name);
c93d9daf	257	}
0133c199	258	break;
7a3d1328	259	case LTTNG_EVENT_ALL:
2bdd86d4 MD	260	MSG("All %s events are enabled in channel %s",
2bdd86d4 MD	261	opt_kernel ? "kernel" : "UST", channel_name);
7a3d1328	262	break;
0133c199	263	default:
8c9ae521	264	/*
6181537c DG	265	* We should not be here since lttng_enable_event should have
6181537c DG	266	* failed on the event type.
8c9ae521	267	*/
f3ed775e DG	268	goto error;
f3ed775e DG	269	}
8c9ae521	270	goto end;
f3ed775e DG	271	}
	272
	273	/* Strip event list */
	274	event_name = strtok(opt_event_list, ",");
	275	while (event_name != NULL) {
6181537c DG	276	/* Copy name and type of the event */
	277	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	278	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
	279	ev.type = opt_event_type;
	280
f3ed775e DG	281	/* Kernel tracer action */
	282	if (opt_kernel) {
	283	DBG("Enabling kernel event %s for channel %s",
	284	event_name, channel_name);
f3ed775e DG	285
f3ed775e DG	286	switch (opt_event_type) {
7a3d1328 MD	287	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
	288	ev.type = LTTNG_EVENT_TRACEPOINT;
	289	/* Fall-through */
e6ddca71	290	case LTTNG_EVENT_TRACEPOINT:
f3ed775e	291	break;
7d29a247	292	case LTTNG_EVENT_PROBE:
cf0e5467	293	ret = parse_probe_opts(&ev, opt_probe);
0d63dd19	294	if (ret < 0) {
cf0e5467	295	ERR("Unable to parse probe options");
0d63dd19 DG	296	ret = 0;
	297	goto error;
	298	}
f3ed775e DG	299	break;
f3ed775e DG	300	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	301	ret = parse_probe_opts(&ev, opt_function);
	302	if (ret < 0) {
	303	ERR("Unable to parse function probe options");
	304	ret = 0;
	305	goto error;
	306	}
	307	break;
	308	case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c DG	309	strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
6181537c DG	310	LTTNG_SYMBOL_NAME_LEN);
99497cd0	311	ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e	312	break;
a54bd42d	313	case LTTNG_EVENT_SYSCALL:
6181537c DG	314	MSG("per-syscall selection not supported yet. Use \"-a\" "
6181537c DG	315	"for all syscalls.");
f3ed775e DG	316	default:
	317	ret = CMD_NOT_IMPLEMENTED;
	318	goto error;
	319	}
f3ed775e	320	} else if (opt_userspace) { /* User-space tracer action */
2bdd86d4	321	if (!opt_pid_all) {
6181537c DG	322	MSG("Only supporting tracing all UST processes "
6181537c DG	323	"(-u --all) for now.");
2bdd86d4 MD	324	ret = CMD_NOT_IMPLEMENTED;
	325	goto error;
	326	}
6181537c DG	327
	328	DBG("Enabling UST event %s for channel %s", event_name,
	329	channel_name);
2bdd86d4 MD	330
	331	switch (opt_event_type) {
	332	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
	333	ev.type = LTTNG_EVENT_TRACEPOINT;
	334	/* Fall-through */
	335	case LTTNG_EVENT_TRACEPOINT:
	336	break;
13dce3b7 MD	337	case LTTNG_EVENT_TRACEPOINT_LOGLEVEL:
	338	ev.type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
	339	break;
2bdd86d4 MD	340	case LTTNG_EVENT_PROBE:
	341	case LTTNG_EVENT_FUNCTION:
	342	case LTTNG_EVENT_FUNCTION_ENTRY:
	343	case LTTNG_EVENT_SYSCALL:
	344	default:
	345	ret = CMD_NOT_IMPLEMENTED;
	346	goto error;
	347	}
f3ed775e	348	} else {
048e2159	349	ERR("Please specify a tracer (--kernel or --userspace)");
f3ed775e DG	350	goto error;
	351	}
	352
6181537c DG	353	ret = lttng_enable_event(handle, &ev, channel_name);
	354	if (ret == 0) {
	355	MSG("%s event %s created in channel %s",
	356	opt_kernel ? "kernel": "UST", event_name, channel_name);
	357	}
	358
f3ed775e DG	359	/* Next event */
	360	event_name = strtok(NULL, ",");
	361	}
	362
8c9ae521	363	end:
f3ed775e	364	error:
b73d0b29 MD	365	if (opt_channel_name == NULL) {
	366	free(channel_name);
	367	}
cd80958d DG	368	lttng_destroy_handle(handle);
cd80958d DG	369
f3ed775e DG	370	return ret;
	371	}
	372
	373	/*
6181537c	374	* Add event to trace session
f3ed775e DG	375	*/
	376	int cmd_enable_events(int argc, const char **argv)
	377	{
	378	int opt, ret;
	379	static poptContext pc;
cd80958d	380	char *session_name = NULL;
f3ed775e DG	381
	382	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	383	poptReadDefaultConfig(pc, 0);
	384
	385	/* Default event type */
7a3d1328	386	opt_event_type = LTTNG_EVENT_ALL;
f3ed775e DG	387
	388	while ((opt = poptGetNextOpt(pc)) != -1) {
	389	switch (opt) {
	390	case OPT_HELP:
	391	usage(stderr);
	392	ret = CMD_SUCCESS;
	393	goto end;
f3ed775e	394	case OPT_TRACEPOINT:
e6ddca71	395	opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e	396	break;
cf0e5467	397	case OPT_PROBE:
7d29a247	398	opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e DG	399	break;
	400	case OPT_FUNCTION:
	401	opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b MD	402	break;
	403	case OPT_FUNCTION_ENTRY:
	404	opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e	405	break;
a54bd42d MD	406	case OPT_SYSCALL:
a54bd42d MD	407	opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199	408	break;
eeac7d46 MD	409	case OPT_USERSPACE:
eeac7d46 MD	410	opt_userspace = 1;
eeac7d46	411	break;
13dce3b7 MD	412	case OPT_TRACEPOINT_LOGLEVEL:
	413	opt_event_type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
	414	break;
f3ed775e DG	415	default:
	416	usage(stderr);
	417	ret = CMD_UNDEFINED;
	418	goto end;
	419	}
	420	}
	421
	422	opt_event_list = (char*) poptGetArg(pc);
	423	if (opt_event_list == NULL && opt_enable_all == 0) {
	424	ERR("Missing event name(s).\n");
	425	usage(stderr);
	426	ret = CMD_SUCCESS;
	427	goto end;
	428	}
	429
cd80958d DG	430	if (!opt_session_name) {
	431	session_name = get_session_name();
	432	if (session_name == NULL) {
	433	ret = -1;
	434	goto end;
	435	}
	436	} else {
	437	session_name = opt_session_name;
	438	}
	439
	440	ret = enable_events(session_name);
f3ed775e DG	441
f3ed775e DG	442	end:
cd80958d DG	443	if (opt_session_name == NULL) {
	444	free(session_name);
	445	}
	446
f3ed775e DG	447	return ret;
f3ed775e DG	448	}