[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 const char *opt_loglevel;
static int opt_loglevel_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_LOGLEVEL,
	OPT_LOGLEVEL_ONLY,
	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_STRING, 0, OPT_LOGLEVEL, 0, 0},
	{"loglevel-only",  0,     POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 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 name\n");
	fprintf(ofp, "                           Tracepoint loglevel (range: 0 to loglevel)\n");
	fprintf(ofp, "    --loglevel-only name\n");
	fprintf(ofp, "                           Tracepoint loglevel (only this 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_ERROR;
		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;
			}

			if (opt_loglevel[0] != '\0') {
				MSG("Kernel loglevels are not supported.");
				ret = CMD_UNDEFINED;
				goto error;
			}

			/* kernel loglevels not implemented */
			ev.loglevel_type = opt_loglevel_type;
			ev.loglevel[0] = '\0';
		} 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_PROBE:
			case LTTNG_EVENT_FUNCTION:
			case LTTNG_EVENT_FUNCTION_ENTRY:
			case LTTNG_EVENT_SYSCALL:
			default:
				ret = CMD_UNDEFINED;
				goto error;
			}

			ev.loglevel_type = opt_loglevel_type;
			strncpy(ev.loglevel, opt_loglevel, LTTNG_SYMBOL_NAME_LEN);
			ev.loglevel[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
		} 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_LOGLEVEL:
			opt_loglevel_type = LTTNG_EVENT_LOGLEVEL;
			opt_loglevel = poptGetOptArg(pc);
			break;
		case OPT_LOGLEVEL_ONLY:
			opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_ONLY;
			opt_loglevel = poptGetOptArg(pc);
			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;
dad47fc4 MD	34	static const char *opt_loglevel;
dad47fc4 MD	35	static int opt_loglevel_type;
6181537c	36	static int opt_kernel;
5440dc42	37	static char *opt_session_name;
f3ed775e DG	38	static int opt_userspace;
f3ed775e DG	39	static int opt_enable_all;
cf0e5467	40	static char *opt_probe;
8f0d098b MD	41	static char *opt_function;
8f0d098b MD	42	static char *opt_function_entry_symbol;
f3ed775e	43	static char *opt_channel_name;
d78d6610 DG	44	#if 0
	45	/* Not implemented yet */
	46	static char *opt_cmd_name;
	47	static pid_t opt_pid;
	48	#endif
f3ed775e DG	49
	50	enum {
	51	OPT_HELP = 1,
f3ed775e	52	OPT_TRACEPOINT,
cf0e5467	53	OPT_PROBE,
f3ed775e	54	OPT_FUNCTION,
8f0d098b	55	OPT_FUNCTION_ENTRY,
a54bd42d	56	OPT_SYSCALL,
eeac7d46	57	OPT_USERSPACE,
dad47fc4 MD	58	OPT_LOGLEVEL,
dad47fc4 MD	59	OPT_LOGLEVEL_ONLY,
679b4943	60	OPT_LIST_OPTIONS,
f3ed775e DG	61	};
f3ed775e DG	62
cd80958d DG	63	static struct lttng_handle *handle;
cd80958d DG	64
f3ed775e DG	65	static struct poptOption long_options[] = {
	66	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	67	{"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
5440dc42	68	{"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
e14f64a8	69	{"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
f3ed775e DG	70	{"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
f3ed775e DG	71	{"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
d78d6610 DG	72	#if 0
d78d6610 DG	73	/* Not implemented yet */
40e9d5d3	74	{"userspace", 'u', POPT_ARG_STRING \| POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
f3ed775e	75	{"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
d78d6610 DG	76	#else
	77	{"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
	78	#endif
f3ed775e	79	{"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
7ebae521	80	{"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
40e9d5d3	81	{"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
b213d387 MD	82	#if 0
	83	/*
	84	* Currently removed from lttng kernel tracer. Removed from
	85	* lttng UI to discourage its use.
	86	*/
40e9d5d3	87	{"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0},
b213d387	88	#endif
7ebae521	89	{"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
dad47fc4 MD	90	{"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
dad47fc4 MD	91	{"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
679b4943	92	{"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
f3ed775e DG	93	{0, 0, 0, 0, 0, 0, 0}
	94	};
	95
	96	/*
	97	* usage
	98	*/
	99	static void usage(FILE *ofp)
	100	{
	101	fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [options] [event_options]\n");
	102	fprintf(ofp, "\n");
	103	fprintf(ofp, " -h, --help Show this help\n");
679b4943	104	fprintf(ofp, " --list-options Simple listing of options\n");
5440dc42	105	fprintf(ofp, " -s, --session Apply on session name\n");
f3ed775e	106	fprintf(ofp, " -c, --channel Apply on this channel\n");
e14f64a8	107	fprintf(ofp, " -a, --all Enable all tracepoints\n");
f3ed775e	108	fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n");
d78d6610	109	#if 0
f3ed775e	110	fprintf(ofp, " -u, --userspace [CMD] Apply for the user-space tracer\n");
e14f64a8 DG	111	fprintf(ofp, " If no CMD, the domain used is UST global\n");
	112	fprintf(ofp, " or else the domain is UST EXEC_NAME\n");
	113	fprintf(ofp, " -p, --pid PID If -u, apply to specific PID (domain: UST PID)\n");
d78d6610 DG	114	#else
	115	fprintf(ofp, " -u, --userspace Apply for the user-space tracer\n");
	116	#endif
f3ed775e DG	117	fprintf(ofp, "\n");
	118	fprintf(ofp, "Event options:\n");
	119	fprintf(ofp, " --tracepoint Tracepoint event (default)\n");
be49af1e MD	120	fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n");
	121	fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n");
	122	fprintf(ofp, " e.g.:\n");
	123	fprintf(ofp, " \"*\"\n");
	124	fprintf(ofp, " \"app_component:na*\"\n");
dad47fc4 MD	125	fprintf(ofp, " --loglevel name\n");
	126	fprintf(ofp, " Tracepoint loglevel (range: 0 to loglevel)\n");
	127	fprintf(ofp, " --loglevel-only name\n");
	128	fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n");
8f0d098b	129	fprintf(ofp, " --probe [addr \| symbol \| symbol+offset]\n");
cf0e5467 MD	130	fprintf(ofp, " Dynamic probe.\n");
	131	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	132	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
8f0d098b MD	133	fprintf(ofp, " --function [addr \| symbol \| symbol+offset]\n");
	134	fprintf(ofp, " Dynamic function entry/return probe.\n");
	135	fprintf(ofp, " Addr and offset can be octal (0NNN...),\n");
	136	fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n");
b213d387	137	#if 0
8f0d098b MD	138	fprintf(ofp, " --function:entry symbol\n");
8f0d098b MD	139	fprintf(ofp, " Function tracer event\n");
b213d387	140	#endif
a54bd42d	141	fprintf(ofp, " --syscall System call event\n");
f3ed775e DG	142	fprintf(ofp, "\n");
	143	}
	144
0d63dd19	145	/*
6181537c	146	* Parse probe options.
0d63dd19	147	*/
cf0e5467	148	static int parse_probe_opts(struct lttng_event ev, char opt)
0d63dd19 DG	149	{
0d63dd19 DG	150	int ret;
8ff0bbd0	151	char s_hex[19];
0d63dd19 DG	152	char name[LTTNG_SYMBOL_NAME_LEN];
	153
	154	if (opt == NULL) {
	155	ret = -1;
8f0d098b	156	goto end;
0d63dd19 DG	157	}
	158
	159	/* Check for symbol+offset */
8ff0bbd0	160	ret = sscanf(opt, "%[^'+']+%s", name, s_hex);
0d63dd19	161	if (ret == 2) {
7d29a247	162	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	163	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
cf0e5467	164	DBG("probe symbol %s", ev->attr.probe.symbol_name);
8ff0bbd0 DG	165	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	166	ERR("Invalid probe offset %s", s_hex);
0d63dd19	167	ret = -1;
8f0d098b	168	goto end;
0d63dd19	169	}
8ff0bbd0	170	ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
cf0e5467	171	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
3000dc78	172	ev->attr.probe.addr = 0;
8f0d098b MD	173	goto end;
	174	}
	175
	176	/* Check for symbol */
	177	if (isalpha(name[0])) {
	178	ret = sscanf(opt, "%s", name);
	179	if (ret == 1) {
	180	strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
99497cd0	181	ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
8f0d098b MD	182	DBG("probe symbol %s", ev->attr.probe.symbol_name);
	183	ev->attr.probe.offset = 0;
	184	DBG("probe offset %" PRIu64, ev->attr.probe.offset);
	185	ev->attr.probe.addr = 0;
	186	goto end;
	187	}
0d63dd19 DG	188	}
	189
	190	/* Check for address */
8ff0bbd0	191	ret = sscanf(opt, "%s", s_hex);
0d63dd19	192	if (ret > 0) {
8ff0bbd0 DG	193	if (strlen(s_hex) == 0) {
8ff0bbd0 DG	194	ERR("Invalid probe address %s", s_hex);
0d63dd19	195	ret = -1;
8f0d098b	196	goto end;
0d63dd19	197	}
8ff0bbd0	198	ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
cf0e5467	199	DBG("probe addr %" PRIu64, ev->attr.probe.addr);
3000dc78 DG	200	ev->attr.probe.offset = 0;
3000dc78 DG	201	memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
8f0d098b	202	goto end;
0d63dd19 DG	203	}
	204
	205	/* No match */
	206	ret = -1;
	207
8f0d098b	208	end:
0d63dd19 DG	209	return ret;
	210	}
	211
f3ed775e	212	/*
6181537c	213	* Enabling event using the lttng API.
f3ed775e	214	*/
cd80958d	215	static int enable_events(char *session_name)
f3ed775e DG	216	{
f3ed775e DG	217	int err, ret = CMD_SUCCESS;
b73d0b29	218	char event_name, channel_name = NULL;
f3ed775e	219	struct lttng_event ev;
7d29a247	220	struct lttng_domain dom;
f3ed775e	221
f3ed775e DG	222	if (opt_channel_name == NULL) {
	223	err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME);
	224	if (err < 0) {
	225	ret = CMD_FATAL;
	226	goto error;
	227	}
	228	} else {
	229	channel_name = opt_channel_name;
	230	}
	231
2bdd86d4	232	if (opt_kernel && opt_userspace) {
e14f64a8	233	ERR("Can't use -k/--kernel and -u/--userspace together");
2bdd86d4 MD	234	ret = CMD_FATAL;
	235	goto error;
	236	}
6181537c	237
7d29a247 DG	238	/* Create lttng domain */
	239	if (opt_kernel) {
	240	dom.type = LTTNG_DOMAIN_KERNEL;
d78d6610	241	} else if (opt_userspace) {
2bdd86d4	242	dom.type = LTTNG_DOMAIN_UST;
6181537c	243	} else {
e14f64a8	244	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
d16c1a4c	245	ret = CMD_ERROR;
6181537c	246	goto error;
2bdd86d4	247	}
7d29a247	248
cd80958d DG	249	handle = lttng_create_handle(session_name, &dom);
	250	if (handle == NULL) {
	251	ret = -1;
	252	goto error;
	253	}
1aef21b6	254
cd80958d	255	if (opt_enable_all) {
8c9ae521	256	/* Default setup for enable all */
75e8c5ab MD	257
	258	if (opt_kernel) {
	259	ev.type = opt_event_type;
	260	ev.name[0] = '\0';
	261	} else {
	262	ev.type = LTTNG_EVENT_TRACEPOINT;
	263	strcpy(ev.name, "*");
	264	}
8c9ae521 DG	265
	266	ret = lttng_enable_event(handle, &ev, channel_name);
	267	if (ret < 0) {
	268	goto error;
	269	}
	270
0133c199 MD	271	switch (opt_event_type) {
0133c199 MD	272	case LTTNG_EVENT_TRACEPOINT:
2bdd86d4 MD	273	MSG("All %s tracepoints are enabled in channel %s",
2bdd86d4 MD	274	opt_kernel ? "kernel" : "UST", channel_name);
0133c199	275	break;
a54bd42d	276	case LTTNG_EVENT_SYSCALL:
0133c199	277	if (opt_kernel) {
8c9ae521 DG	278	MSG("All kernel system calls are enabled in channel %s",
8c9ae521 DG	279	channel_name);
c93d9daf	280	}
0133c199	281	break;
7a3d1328	282	case LTTNG_EVENT_ALL:
2bdd86d4 MD	283	MSG("All %s events are enabled in channel %s",
2bdd86d4 MD	284	opt_kernel ? "kernel" : "UST", channel_name);
7a3d1328	285	break;
0133c199	286	default:
8c9ae521	287	/*
6181537c DG	288	* We should not be here since lttng_enable_event should have
6181537c DG	289	* failed on the event type.
8c9ae521	290	*/
f3ed775e DG	291	goto error;
f3ed775e DG	292	}
8c9ae521	293	goto end;
f3ed775e DG	294	}
	295
	296	/* Strip event list */
	297	event_name = strtok(opt_event_list, ",");
	298	while (event_name != NULL) {
6181537c DG	299	/* Copy name and type of the event */
	300	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	301	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
	302	ev.type = opt_event_type;
	303
f3ed775e DG	304	/* Kernel tracer action */
	305	if (opt_kernel) {
	306	DBG("Enabling kernel event %s for channel %s",
	307	event_name, channel_name);
f3ed775e DG	308
f3ed775e DG	309	switch (opt_event_type) {
7a3d1328 MD	310	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
	311	ev.type = LTTNG_EVENT_TRACEPOINT;
	312	/* Fall-through */
e6ddca71	313	case LTTNG_EVENT_TRACEPOINT:
f3ed775e	314	break;
7d29a247	315	case LTTNG_EVENT_PROBE:
cf0e5467	316	ret = parse_probe_opts(&ev, opt_probe);
0d63dd19	317	if (ret < 0) {
cf0e5467	318	ERR("Unable to parse probe options");
0d63dd19 DG	319	ret = 0;
	320	goto error;
	321	}
f3ed775e DG	322	break;
f3ed775e DG	323	case LTTNG_EVENT_FUNCTION:
8f0d098b MD	324	ret = parse_probe_opts(&ev, opt_function);
	325	if (ret < 0) {
	326	ERR("Unable to parse function probe options");
	327	ret = 0;
	328	goto error;
	329	}
	330	break;
	331	case LTTNG_EVENT_FUNCTION_ENTRY:
6181537c DG	332	strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
6181537c DG	333	LTTNG_SYMBOL_NAME_LEN);
99497cd0	334	ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e	335	break;
a54bd42d	336	case LTTNG_EVENT_SYSCALL:
6181537c DG	337	MSG("per-syscall selection not supported yet. Use \"-a\" "
6181537c DG	338	"for all syscalls.");
f3ed775e	339	default:
1ab1ea0b	340	ret = CMD_UNDEFINED;
f3ed775e DG	341	goto error;
f3ed775e DG	342	}
dad47fc4 MD	343
	344	if (opt_loglevel[0] != '\0') {
	345	MSG("Kernel loglevels are not supported.");
	346	ret = CMD_UNDEFINED;
	347	goto error;
	348	}
	349
	350	/* kernel loglevels not implemented */
	351	ev.loglevel_type = opt_loglevel_type;
	352	ev.loglevel[0] = '\0';
f3ed775e	353	} else if (opt_userspace) { /* User-space tracer action */
d78d6610	354	#if 0
e14f64a8 DG	355	if (opt_cmd_name != NULL \|\| opt_pid) {
e14f64a8 DG	356	MSG("Only supporting tracing all UST processes (-u) for now.");
1ab1ea0b	357	ret = CMD_UNDEFINED;
2bdd86d4 MD	358	goto error;
2bdd86d4 MD	359	}
d78d6610	360	#endif
6181537c DG	361
	362	DBG("Enabling UST event %s for channel %s", event_name,
	363	channel_name);
2bdd86d4 MD	364
	365	switch (opt_event_type) {
	366	case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
2bdd86d4 MD	367	/* Fall-through */
2bdd86d4 MD	368	case LTTNG_EVENT_TRACEPOINT:
e4baff1e MD	369	/* Copy name and type of the event */
	370	ev.type = LTTNG_EVENT_TRACEPOINT;
	371	strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
	372	ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
2bdd86d4 MD	373	break;
	374	case LTTNG_EVENT_PROBE:
	375	case LTTNG_EVENT_FUNCTION:
	376	case LTTNG_EVENT_FUNCTION_ENTRY:
	377	case LTTNG_EVENT_SYSCALL:
	378	default:
1ab1ea0b	379	ret = CMD_UNDEFINED;
2bdd86d4 MD	380	goto error;
2bdd86d4 MD	381	}
dad47fc4 MD	382
	383	ev.loglevel_type = opt_loglevel_type;
	384	strncpy(ev.loglevel, opt_loglevel, LTTNG_SYMBOL_NAME_LEN);
	385	ev.loglevel[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
f3ed775e	386	} else {
e14f64a8	387	ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
f3ed775e DG	388	goto error;
	389	}
	390
6181537c DG	391	ret = lttng_enable_event(handle, &ev, channel_name);
	392	if (ret == 0) {
	393	MSG("%s event %s created in channel %s",
	394	opt_kernel ? "kernel": "UST", event_name, channel_name);
	395	}
	396
f3ed775e DG	397	/* Next event */
	398	event_name = strtok(NULL, ",");
	399	}
	400
8c9ae521	401	end:
f3ed775e	402	error:
b73d0b29 MD	403	if (opt_channel_name == NULL) {
	404	free(channel_name);
	405	}
cd80958d DG	406	lttng_destroy_handle(handle);
cd80958d DG	407
f3ed775e DG	408	return ret;
	409	}
	410
	411	/*
6181537c	412	* Add event to trace session
f3ed775e DG	413	*/
	414	int cmd_enable_events(int argc, const char **argv)
	415	{
	416	int opt, ret;
	417	static poptContext pc;
cd80958d	418	char *session_name = NULL;
f3ed775e DG	419
	420	pc = poptGetContext(NULL, argc, argv, long_options, 0);
	421	poptReadDefaultConfig(pc, 0);
	422
	423	/* Default event type */
7a3d1328	424	opt_event_type = LTTNG_EVENT_ALL;
f3ed775e DG	425
	426	while ((opt = poptGetNextOpt(pc)) != -1) {
	427	switch (opt) {
	428	case OPT_HELP:
	429	usage(stderr);
	430	ret = CMD_SUCCESS;
	431	goto end;
f3ed775e	432	case OPT_TRACEPOINT:
e6ddca71	433	opt_event_type = LTTNG_EVENT_TRACEPOINT;
f3ed775e	434	break;
cf0e5467	435	case OPT_PROBE:
7d29a247	436	opt_event_type = LTTNG_EVENT_PROBE;
f3ed775e DG	437	break;
	438	case OPT_FUNCTION:
	439	opt_event_type = LTTNG_EVENT_FUNCTION;
8f0d098b MD	440	break;
	441	case OPT_FUNCTION_ENTRY:
	442	opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
f3ed775e	443	break;
a54bd42d MD	444	case OPT_SYSCALL:
a54bd42d MD	445	opt_event_type = LTTNG_EVENT_SYSCALL;
0133c199	446	break;
eeac7d46 MD	447	case OPT_USERSPACE:
eeac7d46 MD	448	opt_userspace = 1;
eeac7d46	449	break;
dad47fc4 MD	450	case OPT_LOGLEVEL:
	451	opt_loglevel_type = LTTNG_EVENT_LOGLEVEL;
	452	opt_loglevel = poptGetOptArg(pc);
	453	break;
	454	case OPT_LOGLEVEL_ONLY:
	455	opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_ONLY;
	456	opt_loglevel = poptGetOptArg(pc);
13dce3b7	457	break;
679b4943 SM	458	case OPT_LIST_OPTIONS:
	459	list_cmd_options(stdout, long_options);
	460	ret = CMD_SUCCESS;
	461	goto end;
f3ed775e DG	462	default:
	463	usage(stderr);
	464	ret = CMD_UNDEFINED;
	465	goto end;
	466	}
	467	}
	468
	469	opt_event_list = (char*) poptGetArg(pc);
	470	if (opt_event_list == NULL && opt_enable_all == 0) {
	471	ERR("Missing event name(s).\n");
	472	usage(stderr);
	473	ret = CMD_SUCCESS;
	474	goto end;
	475	}
	476
cd80958d DG	477	if (!opt_session_name) {
	478	session_name = get_session_name();
	479	if (session_name == NULL) {
	480	ret = -1;
	481	goto end;
	482	}
	483	} else {
	484	session_name = opt_session_name;
	485	}
	486
	487	ret = enable_events(session_name);
f3ed775e DG	488
f3ed775e DG	489	end:
cd80958d DG	490	if (opt_session_name == NULL) {
	491	free(session_name);
	492	}
	493
f3ed775e DG	494	return ret;
f3ed775e DG	495	}