[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 int opt_enable_all;
static char *opt_probe;
static char *opt_function;
static char *opt_function_entry_symbol;
static char *opt_channel_name;
#if 0
/* Not implemented yet */
static char *opt_cmd_name;
static pid_t opt_pid;
#endif

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

static struct lttng_handle *handle;

static struct poptOption long_options[] = {
	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	{"help",           'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
	{"session",        's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
	{"all",            'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
	{"channel",        'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
	{"kernel",         'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
#if 0
	/* Not implemented yet */
	{"userspace",      'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
	{"pid",            'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
#else
	{"userspace",      'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
#endif
	{"tracepoint",     0,   POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
	{"probe",          0,   POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
	{"function",       0,   POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
#if 0
	/*
	 * Currently removed from lttng kernel tracer. Removed from
	 * lttng UI to discourage its use.
	 */
	{"function:entry", 0,   POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
#endif
	{"syscall",        0,   POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
	{"loglevel",     0,     POPT_ARG_NONE, 0, OPT_TRACEPOINT_LOGLEVEL, 0, 0},
	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
	{0, 0, 0, 0, 0, 0, 0}
};

/*
 * usage
 */
static void usage(FILE *ofp)
{
	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	fprintf(ofp, "\n");
	fprintf(ofp, "  -h, --help               Show this help\n");
	fprintf(ofp, "      --list-options       Simple listing of options\n");
	fprintf(ofp, "  -s, --session            Apply 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");
#if 0
	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");
#else
	fprintf(ofp, "  -u, --userspace          Apply for the user-space tracer\n");
#endif
	fprintf(ofp, "\n");
	fprintf(ofp, "Event options:\n");
	fprintf(ofp, "    --tracepoint           Tracepoint event (default)\n");
	fprintf(ofp, "                           - userspace tracer supports wildcards at end of string.\n");
	fprintf(ofp, "                             Don't forget to quote to deal with bash expansion.\n");
	fprintf(ofp, "                             e.g.:\n");
	fprintf(ofp, "                               \"*\"\n");
	fprintf(ofp, "                               \"app_component:na*\"\n");
	fprintf(ofp, "    --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_userspace) {
		dom.type = LTTNG_DOMAIN_UST;
	} else {
		ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
		ret = CMD_UNDEFINED;
		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_UNDEFINED;
				goto error;
			}
		} else if (opt_userspace) {		/* User-space tracer action */
#if 0
			if (opt_cmd_name != NULL || opt_pid) {
				MSG("Only supporting tracing all UST processes (-u) for now.");
				ret = CMD_UNDEFINED;
				goto error;
			}
#endif

			DBG("Enabling UST event %s for channel %s", 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_UNDEFINED;
				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;
		case OPT_LIST_OPTIONS:
			list_cmd_options(stdout, long_options);
			ret = CMD_SUCCESS;
			goto end;
		default:
			usage(stderr);
			ret = CMD_UNDEFINED;
			goto end;
		}
	}

	opt_event_list = (char*) poptGetArg(pc);
	if (opt_event_list == NULL && opt_enable_all == 0) {
		ERR("Missing event name(s).\n");
		usage(stderr);
		ret = CMD_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 DG	36	static int opt_userspace;
f3ed775e DG	37	static int opt_enable_all;
cf0e5467	38	static char *opt_probe;
8f0d098b MD	39	static char *opt_function;
8f0d098b MD	40	static char *opt_function_entry_symbol;
f3ed775e	41	static char *opt_channel_name;
d78d6610 DG	42	#if 0
	43	/* Not implemented yet */
	44	static char *opt_cmd_name;
	45	static pid_t opt_pid;
	46	#endif
f3ed775e DG	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,
679b4943	57	OPT_LIST_OPTIONS,
f3ed775e DG	58	};
f3ed775e DG	59
cd80958d DG	60	static struct lttng_handle *handle;
cd80958d DG	61
f3ed775e DG	62	static struct poptOption long_options[] = {
	63	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	64	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42	65	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8	66	{"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e DG	67	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
f3ed775e DG	68	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610 DG	69	#if 0
d78d6610 DG	70	/* Not implemented yet */
40e9d5d3	71	{"userspace", 'u', POPT_ARG_STRING \| POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
f3ed775e	72	{"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
d78d6610 DG	73	#else
	74	{"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
	75	#endif
f3ed775e	76	{"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521	77	{"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3	78	{"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
b213d387 MD	79	#if 0
	80	/*
	81	* Currently removed from lttng kernel tracer. Removed from
	82	* lttng UI to discourage its use.
	83	*/
40e9d5d3	84	{"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
b213d387	85	#endif
7ebae521	86	{"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
13dce3b7	87	{"loglevel", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT_LOGLEVEL, 0, 0},
679b4943	88	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
f3ed775e DG	89	{0, 0, 0, 0, 0, 0, 0}
	90	};
	91
	92	/*
	93	* usage
	94	*/
	95	static void usage(FILE *ofp)
	96	{
	97	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	98	fprintf(ofp, "\n");
	99	fprintf(ofp, " -h, --help Show this help\n");
679b4943	100	fprintf(ofp, " --list-options Simple listing of options\n");
5440dc42	101	fprintf(ofp, " -s, --session Apply on session name\n");
f3ed775e	102	fprintf(ofp, " -c, --channel Apply on this channel\n");
e14f64a8	103	fprintf(ofp, " -a, --all Enable all tracepoints\n");
f3ed775e	104	fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
d78d6610	105	#if 0
f3ed775e	106	fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
e14f64a8 DG	107	fprintf(ofp, " If no CMD, the domain used is UST global\n");
	108	fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
	109	fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
d78d6610 DG	110	#else
	111	fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n");
	112	#endif
f3ed775e DG	113	fprintf(ofp, "\n");
	114	fprintf(ofp, "Event options:\n");
	115	fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
be49af1e MD	116	fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
	117	fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
	118	fprintf(ofp, " e.g.:\n");
	119	fprintf(ofp, " \"*\"\n");
	120	fprintf(ofp, " \"app_component:na*\"\n");
13dce3b7	121	fprintf(ofp, " --loglevel Tracepoint loglevel\n");
8f0d098b	122	fprintf(ofp, " --probe [addr \| symbol \| symbol+offset]\n");
cf0e5467 MD	123	fprintf(ofp, " Dynamic probe.\n");
	124	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	125	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
8f0d098b MD	126	fprintf(ofp, " --function [addr \| symbol \| symbol+offset]\n");
	127	fprintf(ofp, " Dynamic function entry/return probe.\n");
	128	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	129	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387	130	#if 0
8f0d098b MD	131	fprintf(ofp, " --function:entry symbol\n");
8f0d098b MD	132	fprintf(ofp, " Function tracer event\n");
b213d387	133	#endif
a54bd42d	134	fprintf(ofp, " --syscall System call event\n");
f3ed775e DG	135	fprintf(ofp, "\n");
	136	}
	137
0d63dd19	138	/*
6181537c	139	* Parse probe options.
0d63dd19	140	*/
cf0e5467	141	static int parse_probe_opts(struct lttng_event ev, char opt)
0d63dd19 DG	142	{
0d63dd19 DG	143	int ret;
8ff0bbd0	144	char s_hex[19];
0d63dd19 DG	145	char name[LTTNG_SYMBOL_NAME_LEN];
	146
	147	if (opt == NULL) {
	148	ret = -1;
8f0d098b	149	goto end;
0d63dd19 DG	150	}
	151
	152	/* Check for symbol+offset */
8ff0bbd0	153	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19	154	if (ret == 2) {
7d29a247	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';
cf0e5467	157	DBG("probe symbol %s", ev->attr.probe.symbol_name);
8ff0bbd0 DG	158	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	159	ERR("Invalid probe offset %s", s_hex);
0d63dd19	160	ret = -1;
8f0d098b	161	goto end;
0d63dd19	162	}
8ff0bbd0	163	ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467	164	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78	165	ev->attr.probe.addr = 0;
8f0d098b MD	166	goto end;
	167	}
	168
	169	/* Check for symbol */
	170	if (isalpha(name[0])) {
	171	ret = sscanf(opt, "%s", name);
	172	if (ret == 1) {
	173	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	174	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b MD	175	DBG("probe symbol %s", ev->attr.probe.symbol_name);
	176	ev->attr.probe.offset = 0;
	177	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
	178	ev->attr.probe.addr = 0;
	179	goto end;
	180	}
0d63dd19 DG	181	}
	182
	183	/* Check for address */
8ff0bbd0	184	ret = sscanf(opt, "%s", s_hex);
0d63dd19	185	if (ret > 0) {
8ff0bbd0 DG	186	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	187	ERR("Invalid probe address %s", s_hex);
0d63dd19	188	ret = -1;
8f0d098b	189	goto end;
0d63dd19	190	}
8ff0bbd0	191	ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467	192	DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78 DG	193	ev->attr.probe.offset = 0;
3000dc78 DG	194	memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b	195	goto end;
0d63dd19 DG	196	}
	197
	198	/* No match */
	199	ret = -1;
	200
8f0d098b	201	end:
0d63dd19 DG	202	return ret;
	203	}
	204
f3ed775e	205	/*
6181537c	206	* Enabling event using the lttng API.
f3ed775e	207	*/
cd80958d	208	static int enable_events(char *session_name)
f3ed775e DG	209	{
f3ed775e DG	210	int err, ret = CMD_SUCCESS;
b73d0b29	211	char event_name, channel_name = NULL;
f3ed775e	212	struct lttng_event ev;
7d29a247	213	struct lttng_domain dom;
f3ed775e	214
f3ed775e DG	215	if (opt_channel_name == NULL) {
	216	err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
	217	if (err < 0) {
	218	ret = CMD_FATAL;
	219	goto error;
	220	}
	221	} else {
	222	channel_name = opt_channel_name;
	223	}
	224
2bdd86d4	225	if (opt_kernel && opt_userspace) {
e14f64a8	226	ERR("Can't use -k/--kernel and -u/--userspace together");
2bdd86d4 MD	227	ret = CMD_FATAL;
	228	goto error;
	229	}
6181537c	230
7d29a247 DG	231	/* Create lttng domain */
	232	if (opt_kernel) {
	233	dom.type = LTTNG_DOMAIN_KERNEL;
d78d6610	234	} else if (opt_userspace) {
2bdd86d4	235	dom.type = LTTNG_DOMAIN_UST;
6181537c	236	} else {
e14f64a8	237	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
1ab1ea0b	238	ret = CMD_UNDEFINED;
6181537c	239	goto error;
2bdd86d4	240	}
7d29a247	241
cd80958d DG	242	handle = lttng_create_handle(session_name, &dom);
	243	if (handle == NULL) {
	244	ret = -1;
	245	goto error;
	246	}
1aef21b6	247
cd80958d	248	if (opt_enable_all) {
8c9ae521	249	/* Default setup for enable all */
75e8c5ab MD	250
	251	if (opt_kernel) {
	252	ev.type = opt_event_type;
	253	ev.name[0] = '\0';
	254	} else {
	255	ev.type = LTTNG_EVENT_TRACEPOINT;
	256	strcpy(ev.name, "*");
	257	}
8c9ae521 DG	258
	259	ret = lttng_enable_event(handle, &ev, channel_name);
	260	if (ret < 0) {
	261	goto error;
	262	}
	263
0133c199 MD	264	switch (opt_event_type) {
0133c199 MD	265	case LTTNG_EVENT_TRACEPOINT:
2bdd86d4 MD	266	MSG("All %s tracepoints are enabled in channel %s",
2bdd86d4 MD	267	opt_kernel ? "kernel" : "UST", channel_name);
0133c199	268	break;
a54bd42d	269	case LTTNG_EVENT_SYSCALL:
0133c199	270	if (opt_kernel) {
8c9ae521 DG	271	MSG("All kernel system calls are enabled in channel %s",
8c9ae521 DG	272	channel_name);
c93d9daf	273	}
0133c199	274	break;
7a3d1328	275	case LTTNG_EVENT_ALL:
2bdd86d4 MD	276	MSG("All %s events are enabled in channel %s",
2bdd86d4 MD	277	opt_kernel ? "kernel" : "UST", channel_name);
7a3d1328	278	break;
0133c199	279	default:
8c9ae521	280	/*
6181537c DG	281	* We should not be here since lttng_enable_event should have
6181537c DG	282	* failed on the event type.
8c9ae521	283	*/
f3ed775e DG	284	goto error;
f3ed775e DG	285	}
8c9ae521	286	goto end;
f3ed775e DG	287	}
	288
	289	/* Strip event list */
	290	event_name = strtok(opt_event_list, ",");
	291	while (event_name != NULL) {
6181537c DG	292	/* Copy name and type of the event */
	293	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	294	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
	295	ev.type = opt_event_type;
	296
f3ed775e DG	297	/* Kernel tracer action */
	298	if (opt_kernel) {
	299	DBG("Enabling kernel event %s for channel %s",
	300	event_name, channel_name);
f3ed775e DG	301
f3ed775e DG	302	switch (opt_event_type) {
7a3d1328 MD	303	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
	304	ev.type = LTTNG_EVENT_TRACEPOINT;
	305	/* Fall-through */
e6ddca71	306	case LTTNG_EVENT_TRACEPOINT:
f3ed775e	307	break;
7d29a247	308	case LTTNG_EVENT_PROBE:
cf0e5467	309	ret = parse_probe_opts(&ev, opt_probe);
0d63dd19	310	if (ret < 0) {
cf0e5467	311	ERR("Unable to parse probe options");
0d63dd19 DG	312	ret = 0;
	313	goto error;
	314	}
f3ed775e DG	315	break;
f3ed775e DG	316	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	317	ret = parse_probe_opts(&ev, opt_function);
	318	if (ret < 0) {
	319	ERR("Unable to parse function probe options");
	320	ret = 0;
	321	goto error;
	322	}
	323	break;
	324	case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c DG	325	strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
6181537c DG	326	LTTNG_SYMBOL_NAME_LEN);
99497cd0	327	ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e	328	break;
a54bd42d	329	case LTTNG_EVENT_SYSCALL:
6181537c DG	330	MSG("per-syscall selection not supported yet. Use \"-a\" "
6181537c DG	331	"for all syscalls.");
f3ed775e	332	default:
1ab1ea0b	333	ret = CMD_UNDEFINED;
f3ed775e DG	334	goto error;
f3ed775e DG	335	}
f3ed775e	336	} else if (opt_userspace) { /* User-space tracer action */
d78d6610	337	#if 0
e14f64a8 DG	338	if (opt_cmd_name != NULL \|\| opt_pid) {
e14f64a8 DG	339	MSG("Only supporting tracing all UST processes (-u) for now.");
1ab1ea0b	340	ret = CMD_UNDEFINED;
2bdd86d4 MD	341	goto error;
2bdd86d4 MD	342	}
d78d6610	343	#endif
6181537c DG	344
	345	DBG("Enabling UST event %s for channel %s", event_name,
	346	channel_name);
2bdd86d4 MD	347
	348	switch (opt_event_type) {
	349	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4 MD	350	/* Fall-through */
2bdd86d4 MD	351	case LTTNG_EVENT_TRACEPOINT:
e4baff1e MD	352	/* Copy name and type of the event */
	353	ev.type = LTTNG_EVENT_TRACEPOINT;
	354	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	355	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4	356	break;
13dce3b7	357	case LTTNG_EVENT_TRACEPOINT_LOGLEVEL:
e4baff1e	358	/* Copy name and type of the event */
13dce3b7	359	ev.type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
e4baff1e MD	360	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
e4baff1e MD	361	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
13dce3b7	362	break;
2bdd86d4 MD	363	case LTTNG_EVENT_PROBE:
	364	case LTTNG_EVENT_FUNCTION:
	365	case LTTNG_EVENT_FUNCTION_ENTRY:
	366	case LTTNG_EVENT_SYSCALL:
	367	default:
1ab1ea0b	368	ret = CMD_UNDEFINED;
2bdd86d4 MD	369	goto error;
2bdd86d4 MD	370	}
f3ed775e	371	} else {
e14f64a8	372	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
f3ed775e DG	373	goto error;
	374	}
	375
6181537c DG	376	ret = lttng_enable_event(handle, &ev, channel_name);
	377	if (ret == 0) {
	378	MSG("%s event %s created in channel %s",
	379	opt_kernel ? "kernel": "UST", event_name, channel_name);
	380	}
	381
f3ed775e DG	382	/* Next event */
	383	event_name = strtok(NULL, ",");
	384	}
	385
8c9ae521	386	end:
f3ed775e	387	error:
b73d0b29 MD	388	if (opt_channel_name == NULL) {
	389	free(channel_name);
	390	}
cd80958d DG	391	lttng_destroy_handle(handle);
cd80958d DG	392
f3ed775e DG	393	return ret;
	394	}
	395
	396	/*
6181537c	397	* Add event to trace session
f3ed775e DG	398	*/
	399	int cmd_enable_events(int argc, const char **argv)
	400	{
	401	int opt, ret;
	402	static poptContext pc;
cd80958d	403	char *session_name = NULL;
f3ed775e DG	404
	405	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	406	poptReadDefaultConfig(pc, 0);
	407
	408	/* Default event type */
7a3d1328	409	opt_event_type = LTTNG_EVENT_ALL;
f3ed775e DG	410
	411	while ((opt = poptGetNextOpt(pc)) != -1) {
	412	switch (opt) {
	413	case OPT_HELP:
	414	usage(stderr);
	415	ret = CMD_SUCCESS;
	416	goto end;
f3ed775e	417	case OPT_TRACEPOINT:
e6ddca71	418	opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e	419	break;
cf0e5467	420	case OPT_PROBE:
7d29a247	421	opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e DG	422	break;
	423	case OPT_FUNCTION:
	424	opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b MD	425	break;
	426	case OPT_FUNCTION_ENTRY:
	427	opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e	428	break;
a54bd42d MD	429	case OPT_SYSCALL:
a54bd42d MD	430	opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199	431	break;
eeac7d46 MD	432	case OPT_USERSPACE:
eeac7d46 MD	433	opt_userspace = 1;
eeac7d46	434	break;
13dce3b7 MD	435	case OPT_TRACEPOINT_LOGLEVEL:
	436	opt_event_type = LTTNG_EVENT_TRACEPOINT_LOGLEVEL;
	437	break;
679b4943 SM	438	case OPT_LIST_OPTIONS:
	439	list_cmd_options(stdout, long_options);
	440	ret = CMD_SUCCESS;
	441	goto end;
f3ed775e DG	442	default:
	443	usage(stderr);
	444	ret = CMD_UNDEFINED;
	445	goto end;
	446	}
	447	}
	448
	449	opt_event_list = (char*) poptGetArg(pc);
	450	if (opt_event_list == NULL && opt_enable_all == 0) {
	451	ERR("Missing event name(s).\n");
	452	usage(stderr);
	453	ret = CMD_SUCCESS;
	454	goto end;
	455	}
	456
cd80958d DG	457	if (!opt_session_name) {
	458	session_name = get_session_name();
	459	if (session_name == NULL) {
	460	ret = -1;
	461	goto end;
	462	}
	463	} else {
	464	session_name = opt_session_name;
	465	}
	466
	467	ret = enable_events(session_name);
f3ed775e DG	468
f3ed775e DG	469	end:
cd80958d DG	470	if (opt_session_name == NULL) {
	471	free(session_name);
	472	}
	473
f3ed775e DG	474	return ret;
f3ed775e DG	475	}