[deliverable/linux.git] / tools / perf / builtin-probe.c

/*
 * builtin-probe.c
 *
 * Builtin probe command: Set up probe events by C expression
 *
 * Written by Masami Hiramatsu <mhiramat@redhat.com>
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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 <sys/utsname.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>

#undef _GNU_SOURCE
#include "perf.h"
#include "builtin.h"
#include "util/util.h"
#include "util/strlist.h"
#include "util/strfilter.h"
#include "util/symbol.h"
#include "util/debug.h"
#include "util/debugfs.h"
#include "util/parse-options.h"
#include "util/probe-finder.h"
#include "util/probe-event.h"

#define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
#define DEFAULT_FUNC_FILTER "!_*"
#define MAX_PATH_LEN 256

/* Session management structure */
static struct {
	bool list_events;
	bool force_add;
	bool show_lines;
	bool show_vars;
	bool show_ext_vars;
	bool show_funcs;
	bool mod_events;
	int nevents;
	struct perf_probe_event events[MAX_PROBES];
	struct strlist *dellist;
	struct line_range line_range;
	const char *target_module;
	int max_probe_points;
	struct strfilter *filter;
} params;

/* Parse an event definition. Note that any error must die. */
static int parse_probe_event(const char *str)
{
	struct perf_probe_event *pev = &params.events[params.nevents];
	int ret;

	pr_debug("probe-definition(%d): %s\n", params.nevents, str);
	if (++params.nevents == MAX_PROBES) {
		pr_err("Too many probes (> %d) were specified.", MAX_PROBES);
		return -1;
	}

	/* Parse a perf-probe command into event */
	ret = parse_perf_probe_command(str, pev);
	pr_debug("%d arguments\n", pev->nargs);

	return ret;
}

static int parse_probe_event_argv(int argc, const char **argv)
{
	int i, len, ret;
	char *buf;

	/* Bind up rest arguments */
	len = 0;
	for (i = 0; i < argc; i++)
		len += strlen(argv[i]) + 1;
	buf = zalloc(len + 1);
	if (buf == NULL)
		return -ENOMEM;
	len = 0;
	for (i = 0; i < argc; i++)
		len += sprintf(&buf[len], "%s ", argv[i]);
	params.mod_events = true;
	ret = parse_probe_event(buf);
	free(buf);
	return ret;
}

static int opt_add_probe_event(const struct option *opt __used,
			      const char *str, int unset __used)
{
	if (str) {
		params.mod_events = true;
		return parse_probe_event(str);
	} else
		return 0;
}

static int opt_del_probe_event(const struct option *opt __used,
			       const char *str, int unset __used)
{
	if (str) {
		params.mod_events = true;
		if (!params.dellist)
			params.dellist = strlist__new(true, NULL);
		strlist__add(params.dellist, str);
	}
	return 0;
}

#ifdef DWARF_SUPPORT
static int opt_show_lines(const struct option *opt __used,
			  const char *str, int unset __used)
{
	int ret = 0;

	if (str)
		ret = parse_line_range_desc(str, &params.line_range);
	INIT_LIST_HEAD(&params.line_range.line_list);
	params.show_lines = true;

	return ret;
}

static int opt_show_vars(const struct option *opt __used,
			 const char *str, int unset __used)
{
	struct perf_probe_event *pev = &params.events[params.nevents];
	int ret;

	if (!str)
		return 0;

	ret = parse_probe_event(str);
	if (!ret && pev->nargs != 0) {
		pr_err("  Error: '--vars' doesn't accept arguments.\n");
		return -EINVAL;
	}
	params.show_vars = true;

	return ret;
}
#endif

static int opt_set_filter(const struct option *opt __used,
			  const char *str, int unset __used)
{
	const char *err;

	if (str) {
		pr_debug2("Set filter: %s\n", str);
		if (params.filter)
			strfilter__delete(params.filter);
		params.filter = strfilter__new(str, &err);
		if (!params.filter) {
			pr_err("Filter parse error at %td.\n", err - str + 1);
			pr_err("Source: \"%s\"\n", str);
			pr_err("         %*c\n", (int)(err - str + 1), '^');
			return -EINVAL;
		}
	}

	return 0;
}

static const char * const probe_usage[] = {
	"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
	"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
	"perf probe [<options>] --del '[GROUP:]EVENT' ...",
	"perf probe --list",
#ifdef DWARF_SUPPORT
	"perf probe [<options>] --line 'LINEDESC'",
	"perf probe [<options>] --vars 'PROBEPOINT'",
#endif
	NULL
};

static const struct option options[] = {
	OPT_INCR('v', "verbose", &verbose,
		    "be more verbose (show parsed arguments, etc)"),
	OPT_BOOLEAN('l', "list", &params.list_events,
		    "list up current probe events"),
	OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.",
		opt_del_probe_event),
	OPT_CALLBACK('a', "add", NULL,
#ifdef DWARF_SUPPORT
		"[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT"
		" [[NAME=]ARG ...]",
#else
		"[EVENT=]FUNC[+OFF|%return] [[NAME=]ARG ...]",
#endif
		"probe point definition, where\n"
		"\t\tGROUP:\tGroup name (optional)\n"
		"\t\tEVENT:\tEvent name\n"
		"\t\tFUNC:\tFunction name\n"
		"\t\tOFF:\tOffset from function entry (in byte)\n"
		"\t\t%return:\tPut the probe at function return\n"
#ifdef DWARF_SUPPORT
		"\t\tSRC:\tSource code path\n"
		"\t\tRL:\tRelative line number from function entry.\n"
		"\t\tAL:\tAbsolute line number in file.\n"
		"\t\tPT:\tLazy expression of line code.\n"
		"\t\tARG:\tProbe argument (local variable name or\n"
		"\t\t\tkprobe-tracer argument format.)\n",
#else
		"\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n",
#endif
		opt_add_probe_event),
	OPT_BOOLEAN('f', "force", &params.force_add, "forcibly add events"
		    " with existing name"),
#ifdef DWARF_SUPPORT
	OPT_CALLBACK('L', "line", NULL,
		     "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]",
		     "Show source code lines.", opt_show_lines),
	OPT_CALLBACK('V', "vars", NULL,
		     "FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT",
		     "Show accessible variables on PROBEDEF", opt_show_vars),
	OPT_BOOLEAN('\0', "externs", &params.show_ext_vars,
		    "Show external variables too (with --vars only)"),
	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
		   "file", "vmlinux pathname"),
	OPT_STRING('s', "source", &symbol_conf.source_prefix,
		   "directory", "path to kernel source"),
	OPT_STRING('m', "module", &params.target_module,
		   "modname", "target module name"),
#endif
	OPT__DRY_RUN(&probe_event_dry_run),
	OPT_INTEGER('\0', "max-probes", &params.max_probe_points,
		 "Set how many probe points can be found for a probe."),
	OPT_BOOLEAN('F', "funcs", &params.show_funcs,
		    "Show potential probe-able functions."),
	OPT_CALLBACK('\0', "filter", NULL,
		     "[!]FILTER", "Set a filter (with --vars/funcs only)\n"
		     "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"
		     "\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)",
		     opt_set_filter),
	OPT_END()
};

int cmd_probe(int argc, const char **argv, const char *prefix __used)
{
	int ret;

	argc = parse_options(argc, argv, options, probe_usage,
			     PARSE_OPT_STOP_AT_NON_OPTION);
	if (argc > 0) {
		if (strcmp(argv[0], "-") == 0) {
			pr_warning("  Error: '-' is not supported.\n");
			usage_with_options(probe_usage, options);
		}
		ret = parse_probe_event_argv(argc, argv);
		if (ret < 0) {
			pr_err("  Error: Parse Error.  (%d)\n", ret);
			return ret;
		}
	}

	if (params.max_probe_points == 0)
		params.max_probe_points = MAX_PROBES;

	if ((!params.nevents && !params.dellist && !params.list_events &&
	     !params.show_lines && !params.show_funcs))
		usage_with_options(probe_usage, options);

	/*
	 * Only consider the user's kernel image path if given.
	 */
	symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);

	if (params.list_events) {
		if (params.mod_events) {
			pr_err("  Error: Don't use --list with --add/--del.\n");
			usage_with_options(probe_usage, options);
		}
		if (params.show_lines) {
			pr_err("  Error: Don't use --list with --line.\n");
			usage_with_options(probe_usage, options);
		}
		if (params.show_vars) {
			pr_err(" Error: Don't use --list with --vars.\n");
			usage_with_options(probe_usage, options);
		}
		if (params.show_funcs) {
			pr_err("  Error: Don't use --list with --funcs.\n");
			usage_with_options(probe_usage, options);
		}
		ret = show_perf_probe_events();
		if (ret < 0)
			pr_err("  Error: Failed to show event list. (%d)\n",
			       ret);
		return ret;
	}
	if (params.show_funcs) {
		if (params.nevents != 0 || params.dellist) {
			pr_err("  Error: Don't use --funcs with"
			       " --add/--del.\n");
			usage_with_options(probe_usage, options);
		}
		if (params.show_lines) {
			pr_err("  Error: Don't use --funcs with --line.\n");
			usage_with_options(probe_usage, options);
		}
		if (params.show_vars) {
			pr_err("  Error: Don't use --funcs with --vars.\n");
			usage_with_options(probe_usage, options);
		}
		if (!params.filter)
			params.filter = strfilter__new(DEFAULT_FUNC_FILTER,
						       NULL);
		ret = show_available_funcs(params.target_module,
					   params.filter);
		strfilter__delete(params.filter);
		if (ret < 0)
			pr_err("  Error: Failed to show functions."
			       " (%d)\n", ret);
		return ret;
	}

#ifdef DWARF_SUPPORT
	if (params.show_lines) {
		if (params.mod_events) {
			pr_err("  Error: Don't use --line with"
			       " --add/--del.\n");
			usage_with_options(probe_usage, options);
		}
		if (params.show_vars) {
			pr_err(" Error: Don't use --line with --vars.\n");
			usage_with_options(probe_usage, options);
		}

		ret = show_line_range(&params.line_range, params.target_module);
		if (ret < 0)
			pr_err("  Error: Failed to show lines. (%d)\n", ret);
		return ret;
	}
	if (params.show_vars) {
		if (params.mod_events) {
			pr_err("  Error: Don't use --vars with"
			       " --add/--del.\n");
			usage_with_options(probe_usage, options);
		}
		if (!params.filter)
			params.filter = strfilter__new(DEFAULT_VAR_FILTER,
						       NULL);

		ret = show_available_vars(params.events, params.nevents,
					  params.max_probe_points,
					  params.target_module,
					  params.filter,
					  params.show_ext_vars);
		strfilter__delete(params.filter);
		if (ret < 0)
			pr_err("  Error: Failed to show vars. (%d)\n", ret);
		return ret;
	}
#endif

	if (params.dellist) {
		ret = del_perf_probe_events(params.dellist);
		strlist__delete(params.dellist);
		if (ret < 0) {
			pr_err("  Error: Failed to delete events. (%d)\n", ret);
			return ret;
		}
	}

	if (params.nevents) {
		ret = add_perf_probe_events(params.events, params.nevents,
					    params.max_probe_points,
					    params.target_module,
					    params.force_add);
		if (ret < 0) {
			pr_err("  Error: Failed to add events. (%d)\n", ret);
			return ret;
		}
	}
	return 0;
}
Commit	Line	Data
4ea42b18 MH	1	/*
	2	* builtin-probe.c
	3	*
	4	* Builtin probe command: Set up probe events by C expression
	5	*
	6	* Written by Masami Hiramatsu <mhiramat@redhat.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	21	*
	22	*/
	23	#define _GNU_SOURCE
	24	#include <sys/utsname.h>
	25	#include <sys/types.h>
	26	#include <sys/stat.h>
	27	#include <fcntl.h>
	28	#include <errno.h>
	29	#include <stdio.h>
	30	#include <unistd.h>
	31	#include <stdlib.h>
	32	#include <string.h>
	33
	34	#undef _GNU_SOURCE
	35	#include "perf.h"
	36	#include "builtin.h"
	37	#include "util/util.h"
fa28244d	38	#include "util/strlist.h"
bd09d7b5	39	#include "util/strfilter.h"
e0faa8d3	40	#include "util/symbol.h"
89c69c0e	41	#include "util/debug.h"
96c96612	42	#include "util/debugfs.h"
4ea42b18	43	#include "util/parse-options.h"
4ea42b18	44	#include "util/probe-finder.h"
50656eec	45	#include "util/probe-event.h"
4ea42b18	46
bd09d7b5	47	#define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
3c42258c	48	#define DEFAULT_FUNC_FILTER "!_*"
4ea42b18	49	#define MAX_PATH_LEN 256
4ea42b18 MH	50
	51	/* Session management structure */
	52	static struct {
fac13fd5	53	bool list_events;
d761b08b	54	bool force_add;
631c9def	55	bool show_lines;
cf6eb489	56	bool show_vars;
fb8c5a56	57	bool show_ext_vars;
e80711ca	58	bool show_funcs;
cf6eb489	59	bool mod_events;
4235b045 MH	60	int nevents;
4235b045 MH	61	struct perf_probe_event events[MAX_PROBES];
fa28244d	62	struct strlist *dellist;
631c9def	63	struct line_range line_range;
469b9b88	64	const char *target_module;
ef4a3565	65	int max_probe_points;
bd09d7b5	66	struct strfilter *filter;
12a1fadb	67	} params;
4ea42b18	68
253977b0	69	/* Parse an event definition. Note that any error must die. */
146a1439	70	static int parse_probe_event(const char *str)
4ea42b18	71	{
4235b045	72	struct perf_probe_event *pev = &params.events[params.nevents];
146a1439	73	int ret;
4ea42b18	74
4235b045	75	pr_debug("probe-definition(%d): %s\n", params.nevents, str);
8a7ddad8 ACM	76	if (++params.nevents == MAX_PROBES) {
	77	pr_err("Too many probes (> %d) were specified.", MAX_PROBES);
	78	return -1;
	79	}
4ea42b18	80
4235b045	81	/* Parse a perf-probe command into event */
146a1439	82	ret = parse_perf_probe_command(str, pev);
4235b045	83	pr_debug("%d arguments\n", pev->nargs);
146a1439 MH	84
146a1439 MH	85	return ret;
46ab4926 MH	86	}
46ab4926 MH	87
146a1439	88	static int parse_probe_event_argv(int argc, const char **argv)
d1bde3f7	89	{
146a1439	90	int i, len, ret;
d1bde3f7 MH	91	char *buf;
	92
	93	/* Bind up rest arguments */
	94	len = 0;
	95	for (i = 0; i < argc; i++)
	96	len += strlen(argv[i]) + 1;
8a7ddad8 ACM	97	buf = zalloc(len + 1);
	98	if (buf == NULL)
	99	return -ENOMEM;
d1bde3f7 MH	100	len = 0;
	101	for (i = 0; i < argc; i++)
	102	len += sprintf(&buf[len], "%s ", argv[i]);
cf6eb489	103	params.mod_events = true;
146a1439	104	ret = parse_probe_event(buf);
d1bde3f7	105	free(buf);
146a1439	106	return ret;
d1bde3f7 MH	107	}
d1bde3f7 MH	108
253977b0	109	static int opt_add_probe_event(const struct option *opt __used,
46ab4926 MH	110	const char *str, int unset __used)
46ab4926 MH	111	{
cf6eb489 MH	112	if (str) {
cf6eb489 MH	113	params.mod_events = true;
146a1439	114	return parse_probe_event(str);
cf6eb489	115	} else
146a1439	116	return 0;
4ea42b18 MH	117	}
4ea42b18 MH	118
fa28244d MH	119	static int opt_del_probe_event(const struct option *opt __used,
	120	const char *str, int unset __used)
	121	{
	122	if (str) {
cf6eb489	123	params.mod_events = true;
12a1fadb MH	124	if (!params.dellist)
	125	params.dellist = strlist__new(true, NULL);
	126	strlist__add(params.dellist, str);
fa28244d MH	127	}
	128	return 0;
	129	}
	130
4b4da7f7	131	#ifdef DWARF_SUPPORT
0eda7385 HM	132	static int opt_show_lines(const struct option *opt __used,
	133	const char *str, int unset __used)
	134	{
146a1439 MH	135	int ret = 0;
146a1439 MH	136
0eda7385	137	if (str)
146a1439	138	ret = parse_line_range_desc(str, &params.line_range);
12a1fadb MH	139	INIT_LIST_HEAD(&params.line_range.line_list);
12a1fadb MH	140	params.show_lines = true;
146a1439 MH	141
146a1439 MH	142	return ret;
0eda7385	143	}
cf6eb489 MH	144
	145	static int opt_show_vars(const struct option *opt __used,
	146	const char *str, int unset __used)
	147	{
	148	struct perf_probe_event *pev = &params.events[params.nevents];
	149	int ret;
	150
	151	if (!str)
	152	return 0;
	153
	154	ret = parse_probe_event(str);
	155	if (!ret && pev->nargs != 0) {
	156	pr_err(" Error: '--vars' doesn't accept arguments.\n");
	157	return -EINVAL;
	158	}
	159	params.show_vars = true;
	160
	161	return ret;
	162	}
3c42258c	163	#endif
bd09d7b5 MH	164
	165	static int opt_set_filter(const struct option *opt __used,
	166	const char *str, int unset __used)
	167	{
	168	const char *err;
	169
	170	if (str) {
	171	pr_debug2("Set filter: %s\n", str);
	172	if (params.filter)
	173	strfilter__delete(params.filter);
	174	params.filter = strfilter__new(str, &err);
	175	if (!params.filter) {
823c7164	176	pr_err("Filter parse error at %td.\n", err - str + 1);
bd09d7b5 MH	177	pr_err("Source: \"%s\"\n", str);
	178	pr_err(" %*c\n", (int)(err - str + 1), '^');
	179	return -EINVAL;
	180	}
	181	}
	182
	183	return 0;
	184	}
4ea42b18 MH	185
4ea42b18 MH	186	static const char * const probe_usage[] = {
46ab4926 MH	187	"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
46ab4926 MH	188	"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
fa28244d	189	"perf probe [<options>] --del '[GROUP:]EVENT' ...",
4de189fe	190	"perf probe --list",
4b4da7f7	191	#ifdef DWARF_SUPPORT
469b9b88 MH	192	"perf probe [<options>] --line 'LINEDESC'",
469b9b88 MH	193	"perf probe [<options>] --vars 'PROBEPOINT'",
f3ab481c	194	#endif
4ea42b18 MH	195	NULL
	196	};
	197
	198	static const struct option options[] = {
c0555642	199	OPT_INCR('v', "verbose", &verbose,
89c69c0e	200	"be more verbose (show parsed arguments, etc)"),
12a1fadb	201	OPT_BOOLEAN('l', "list", &params.list_events,
fac13fd5	202	"list up current probe events"),
fa28244d MH	203	OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.",
fa28244d MH	204	opt_del_probe_event),
46ab4926	205	OPT_CALLBACK('a', "add", NULL,
4b4da7f7	206	#ifdef DWARF_SUPPORT
32cb0dd5	207	"[EVENT=]FUNC[@SRC][+OFF\|%return\|:RL\|;PT]\|SRC:AL\|SRC;PT"
48481938	208	" [[NAME=]ARG ...]",
4b4da7f7	209	#else
48481938	210	"[EVENT=]FUNC[+OFF\|%return] [[NAME=]ARG ...]",
23e8ec0d	211	#endif
4ea42b18	212	"probe point definition, where\n"
af663d75 MH	213	"\t\tGROUP:\tGroup name (optional)\n"
af663d75 MH	214	"\t\tEVENT:\tEvent name\n"
4ea42b18	215	"\t\tFUNC:\tFunction name\n"
2a9c8c36	216	"\t\tOFF:\tOffset from function entry (in byte)\n"
253977b0	217	"\t\t%return:\tPut the probe at function return\n"
4b4da7f7	218	#ifdef DWARF_SUPPORT
4ea42b18	219	"\t\tSRC:\tSource code path\n"
2a9c8c36 MH	220	"\t\tRL:\tRelative line number from function entry.\n"
	221	"\t\tAL:\tAbsolute line number in file.\n"
	222	"\t\tPT:\tLazy expression of line code.\n"
4ea42b18	223	"\t\tARG:\tProbe argument (local variable name or\n"
50656eec	224	"\t\t\tkprobe-tracer argument format.)\n",
4b4da7f7 MH	225	#else
	226	"\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n",
	227	#endif
253977b0	228	opt_add_probe_event),
12a1fadb	229	OPT_BOOLEAN('f', "force", &params.force_add, "forcibly add events"
d761b08b	230	" with existing name"),
4b4da7f7	231	#ifdef DWARF_SUPPORT
631c9def	232	OPT_CALLBACK('L', "line", NULL,
085ea739	233	"FUNC[:RLN[+NUM\|-RLN2]]\|SRC:ALN[+NUM\|-ALN2]",
631c9def	234	"Show source code lines.", opt_show_lines),
cf6eb489 MH	235	OPT_CALLBACK('V', "vars", NULL,
	236	"FUNC[@SRC][+OFF\|%return\|:RL\|;PT]\|SRC:AL\|SRC;PT",
	237	"Show accessible variables on PROBEDEF", opt_show_vars),
fb8c5a56 MH	238	OPT_BOOLEAN('\0', "externs", &params.show_ext_vars,
fb8c5a56 MH	239	"Show external variables too (with --vars only)"),
4b4da7f7 MH	240	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
4b4da7f7 MH	241	"file", "vmlinux pathname"),
9ed7e1b8 CD	242	OPT_STRING('s', "source", &symbol_conf.source_prefix,
9ed7e1b8 CD	243	"directory", "path to kernel source"),
469b9b88 MH	244	OPT_STRING('m', "module", &params.target_module,
469b9b88 MH	245	"modname", "target module name"),
631c9def	246	#endif
f4d7da49	247	OPT__DRY_RUN(&probe_event_dry_run),
ef4a3565 MH	248	OPT_INTEGER('\0', "max-probes", &params.max_probe_points,
ef4a3565 MH	249	"Set how many probe points can be found for a probe."),
e80711ca MH	250	OPT_BOOLEAN('F', "funcs", &params.show_funcs,
e80711ca MH	251	"Show potential probe-able functions."),
3c42258c MH	252	OPT_CALLBACK('\0', "filter", NULL,
	253	"[!]FILTER", "Set a filter (with --vars/funcs only)\n"
	254	"\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"
	255	"\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)",
	256	opt_set_filter),
4ea42b18 MH	257	OPT_END()
	258	};
	259
4ea42b18 MH	260	int cmd_probe(int argc, const char *argv, const char prefix __used)
4ea42b18 MH	261	{
146a1439 MH	262	int ret;
146a1439 MH	263
4ea42b18	264	argc = parse_options(argc, argv, options, probe_usage,
46ab4926	265	PARSE_OPT_STOP_AT_NON_OPTION);
ce11a603 MH	266	if (argc > 0) {
	267	if (strcmp(argv[0], "-") == 0) {
	268	pr_warning(" Error: '-' is not supported.\n");
	269	usage_with_options(probe_usage, options);
	270	}
146a1439 MH	271	ret = parse_probe_event_argv(argc, argv);
	272	if (ret < 0) {
	273	pr_err(" Error: Parse Error. (%d)\n", ret);
	274	return ret;
	275	}
ce11a603	276	}
46ab4926	277
ef4a3565 MH	278	if (params.max_probe_points == 0)
	279	params.max_probe_points = MAX_PROBES;
	280
4235b045	281	if ((!params.nevents && !params.dellist && !params.list_events &&
e80711ca	282	!params.show_lines && !params.show_funcs))
4ea42b18 MH	283	usage_with_options(probe_usage, options);
4ea42b18 MH	284
fd930ff9 FBH	285	/*
	286	* Only consider the user's kernel image path if given.
	287	*/
	288	symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
	289
12a1fadb	290	if (params.list_events) {
cf6eb489	291	if (params.mod_events) {
146a1439	292	pr_err(" Error: Don't use --list with --add/--del.\n");
fa28244d MH	293	usage_with_options(probe_usage, options);
fa28244d MH	294	}
12a1fadb	295	if (params.show_lines) {
146a1439	296	pr_err(" Error: Don't use --list with --line.\n");
631c9def MH	297	usage_with_options(probe_usage, options);
631c9def MH	298	}
cf6eb489 MH	299	if (params.show_vars) {
	300	pr_err(" Error: Don't use --list with --vars.\n");
	301	usage_with_options(probe_usage, options);
	302	}
e80711ca MH	303	if (params.show_funcs) {
	304	pr_err(" Error: Don't use --list with --funcs.\n");
	305	usage_with_options(probe_usage, options);
	306	}
146a1439 MH	307	ret = show_perf_probe_events();
	308	if (ret < 0)
	309	pr_err(" Error: Failed to show event list. (%d)\n",
	310	ret);
	311	return ret;
4de189fe	312	}
e80711ca MH	313	if (params.show_funcs) {
	314	if (params.nevents != 0 \|\| params.dellist) {
	315	pr_err(" Error: Don't use --funcs with"
	316	" --add/--del.\n");
	317	usage_with_options(probe_usage, options);
	318	}
	319	if (params.show_lines) {
	320	pr_err(" Error: Don't use --funcs with --line.\n");
	321	usage_with_options(probe_usage, options);
	322	}
	323	if (params.show_vars) {
	324	pr_err(" Error: Don't use --funcs with --vars.\n");
	325	usage_with_options(probe_usage, options);
	326	}
3c42258c MH	327	if (!params.filter)
	328	params.filter = strfilter__new(DEFAULT_FUNC_FILTER,
	329	NULL);
	330	ret = show_available_funcs(params.target_module,
	331	params.filter);
	332	strfilter__delete(params.filter);
e80711ca MH	333	if (ret < 0)
	334	pr_err(" Error: Failed to show functions."
	335	" (%d)\n", ret);
	336	return ret;
	337	}
4de189fe	338
4b4da7f7	339	#ifdef DWARF_SUPPORT
12a1fadb	340	if (params.show_lines) {
cf6eb489 MH	341	if (params.mod_events) {
	342	pr_err(" Error: Don't use --line with"
	343	" --add/--del.\n");
	344	usage_with_options(probe_usage, options);
	345	}
	346	if (params.show_vars) {
	347	pr_err(" Error: Don't use --line with --vars.\n");
631c9def MH	348	usage_with_options(probe_usage, options);
631c9def MH	349	}
e0faa8d3	350
469b9b88	351	ret = show_line_range(&params.line_range, params.target_module);
146a1439 MH	352	if (ret < 0)
	353	pr_err(" Error: Failed to show lines. (%d)\n", ret);
	354	return ret;
631c9def	355	}
cf6eb489 MH	356	if (params.show_vars) {
	357	if (params.mod_events) {
	358	pr_err(" Error: Don't use --vars with"
	359	" --add/--del.\n");
	360	usage_with_options(probe_usage, options);
	361	}
bd09d7b5 MH	362	if (!params.filter)
	363	params.filter = strfilter__new(DEFAULT_VAR_FILTER,
	364	NULL);
	365
cf6eb489	366	ret = show_available_vars(params.events, params.nevents,
fb8c5a56	367	params.max_probe_points,
469b9b88	368	params.target_module,
bd09d7b5	369	params.filter,
fb8c5a56	370	params.show_ext_vars);
bd09d7b5	371	strfilter__delete(params.filter);
cf6eb489 MH	372	if (ret < 0)
	373	pr_err(" Error: Failed to show vars. (%d)\n", ret);
	374	return ret;
	375	}
631c9def MH	376	#endif
631c9def MH	377
12a1fadb	378	if (params.dellist) {
146a1439	379	ret = del_perf_probe_events(params.dellist);
12a1fadb	380	strlist__delete(params.dellist);
146a1439 MH	381	if (ret < 0) {
	382	pr_err(" Error: Failed to delete events. (%d)\n", ret);
	383	return ret;
	384	}
fa28244d MH	385	}
fa28244d MH	386
146a1439 MH	387	if (params.nevents) {
146a1439 MH	388	ret = add_perf_probe_events(params.events, params.nevents,
c82ec0a2	389	params.max_probe_points,
469b9b88	390	params.target_module,
c82ec0a2	391	params.force_add);
146a1439 MH	392	if (ret < 0) {
	393	pr_err(" Error: Failed to add events. (%d)\n", ret);
	394	return ret;
	395	}
	396	}
4ea42b18 MH	397	return 0;
4ea42b18 MH	398	}