[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 "!_*"

/* 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)
		return 0;

	if (params.show_lines) {
		pr_warning("Warning: more than one --line options are"
			   " detected. Only the first one is valid.\n");
		return 0;
	}

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

	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|path",
		   "target module name (for online) or path (for offline)"),
#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 MH	49
	50	/* Session management structure */
	51	static struct {
fac13fd5	52	bool list_events;
d761b08b	53	bool force_add;
631c9def	54	bool show_lines;
cf6eb489	55	bool show_vars;
fb8c5a56	56	bool show_ext_vars;
e80711ca	57	bool show_funcs;
cf6eb489	58	bool mod_events;
4235b045 MH	59	int nevents;
4235b045 MH	60	struct perf_probe_event events[MAX_PROBES];
fa28244d	61	struct strlist *dellist;
631c9def	62	struct line_range line_range;
469b9b88	63	const char *target_module;
ef4a3565	64	int max_probe_points;
bd09d7b5	65	struct strfilter *filter;
12a1fadb	66	} params;
4ea42b18	67
253977b0	68	/* Parse an event definition. Note that any error must die. */
146a1439	69	static int parse_probe_event(const char *str)
4ea42b18	70	{
4235b045	71	struct perf_probe_event *pev = &params.events[params.nevents];
146a1439	72	int ret;
4ea42b18	73
4235b045	74	pr_debug("probe-definition(%d): %s\n", params.nevents, str);
8a7ddad8 ACM	75	if (++params.nevents == MAX_PROBES) {
	76	pr_err("Too many probes (> %d) were specified.", MAX_PROBES);
	77	return -1;
	78	}
4ea42b18	79
4235b045	80	/* Parse a perf-probe command into event */
146a1439	81	ret = parse_perf_probe_command(str, pev);
4235b045	82	pr_debug("%d arguments\n", pev->nargs);
146a1439 MH	83
146a1439 MH	84	return ret;
46ab4926 MH	85	}
46ab4926 MH	86
146a1439	87	static int parse_probe_event_argv(int argc, const char **argv)
d1bde3f7	88	{
146a1439	89	int i, len, ret;
d1bde3f7 MH	90	char *buf;
	91
	92	/* Bind up rest arguments */
	93	len = 0;
	94	for (i = 0; i < argc; i++)
	95	len += strlen(argv[i]) + 1;
8a7ddad8 ACM	96	buf = zalloc(len + 1);
	97	if (buf == NULL)
	98	return -ENOMEM;
d1bde3f7 MH	99	len = 0;
	100	for (i = 0; i < argc; i++)
	101	len += sprintf(&buf[len], "%s ", argv[i]);
cf6eb489	102	params.mod_events = true;
146a1439	103	ret = parse_probe_event(buf);
d1bde3f7	104	free(buf);
146a1439	105	return ret;
d1bde3f7 MH	106	}
d1bde3f7 MH	107
253977b0	108	static int opt_add_probe_event(const struct option *opt __used,
46ab4926 MH	109	const char *str, int unset __used)
46ab4926 MH	110	{
cf6eb489 MH	111	if (str) {
cf6eb489 MH	112	params.mod_events = true;
146a1439	113	return parse_probe_event(str);
cf6eb489	114	} else
146a1439	115	return 0;
4ea42b18 MH	116	}
4ea42b18 MH	117
fa28244d MH	118	static int opt_del_probe_event(const struct option *opt __used,
	119	const char *str, int unset __used)
	120	{
	121	if (str) {
cf6eb489	122	params.mod_events = true;
12a1fadb MH	123	if (!params.dellist)
	124	params.dellist = strlist__new(true, NULL);
	125	strlist__add(params.dellist, str);
fa28244d MH	126	}
	127	return 0;
	128	}
	129
4b4da7f7	130	#ifdef DWARF_SUPPORT
0eda7385 HM	131	static int opt_show_lines(const struct option *opt __used,
	132	const char *str, int unset __used)
	133	{
146a1439 MH	134	int ret = 0;
146a1439 MH	135
13e27d76 MH	136	if (!str)
	137	return 0;
	138
	139	if (params.show_lines) {
	140	pr_warning("Warning: more than one --line options are"
	141	" detected. Only the first one is valid.\n");
	142	return 0;
	143	}
	144
12a1fadb	145	params.show_lines = true;
13e27d76 MH	146	ret = parse_line_range_desc(str, &params.line_range);
13e27d76 MH	147	INIT_LIST_HEAD(&params.line_range.line_list);
146a1439 MH	148
146a1439 MH	149	return ret;
0eda7385	150	}
cf6eb489 MH	151
	152	static int opt_show_vars(const struct option *opt __used,
	153	const char *str, int unset __used)
	154	{
	155	struct perf_probe_event *pev = &params.events[params.nevents];
	156	int ret;
	157
	158	if (!str)
	159	return 0;
	160
	161	ret = parse_probe_event(str);
	162	if (!ret && pev->nargs != 0) {
	163	pr_err(" Error: '--vars' doesn't accept arguments.\n");
	164	return -EINVAL;
	165	}
	166	params.show_vars = true;
	167
	168	return ret;
	169	}
3c42258c	170	#endif
bd09d7b5 MH	171
	172	static int opt_set_filter(const struct option *opt __used,
	173	const char *str, int unset __used)
	174	{
	175	const char *err;
	176
	177	if (str) {
	178	pr_debug2("Set filter: %s\n", str);
	179	if (params.filter)
	180	strfilter__delete(params.filter);
	181	params.filter = strfilter__new(str, &err);
	182	if (!params.filter) {
823c7164	183	pr_err("Filter parse error at %td.\n", err - str + 1);
bd09d7b5 MH	184	pr_err("Source: \"%s\"\n", str);
	185	pr_err(" %*c\n", (int)(err - str + 1), '^');
	186	return -EINVAL;
	187	}
	188	}
	189
	190	return 0;
	191	}
4ea42b18 MH	192
4ea42b18 MH	193	static const char * const probe_usage[] = {
46ab4926 MH	194	"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
46ab4926 MH	195	"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
fa28244d	196	"perf probe [<options>] --del '[GROUP:]EVENT' ...",
4de189fe	197	"perf probe --list",
4b4da7f7	198	#ifdef DWARF_SUPPORT
469b9b88 MH	199	"perf probe [<options>] --line 'LINEDESC'",
469b9b88 MH	200	"perf probe [<options>] --vars 'PROBEPOINT'",
f3ab481c	201	#endif
4ea42b18 MH	202	NULL
	203	};
	204
	205	static const struct option options[] = {
c0555642	206	OPT_INCR('v', "verbose", &verbose,
89c69c0e	207	"be more verbose (show parsed arguments, etc)"),
12a1fadb	208	OPT_BOOLEAN('l', "list", &params.list_events,
fac13fd5	209	"list up current probe events"),
fa28244d MH	210	OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.",
fa28244d MH	211	opt_del_probe_event),
46ab4926	212	OPT_CALLBACK('a', "add", NULL,
4b4da7f7	213	#ifdef DWARF_SUPPORT
32cb0dd5	214	"[EVENT=]FUNC[@SRC][+OFF\|%return\|:RL\|;PT]\|SRC:AL\|SRC;PT"
48481938	215	" [[NAME=]ARG ...]",
4b4da7f7	216	#else
48481938	217	"[EVENT=]FUNC[+OFF\|%return] [[NAME=]ARG ...]",
23e8ec0d	218	#endif
4ea42b18	219	"probe point definition, where\n"
af663d75 MH	220	"\t\tGROUP:\tGroup name (optional)\n"
af663d75 MH	221	"\t\tEVENT:\tEvent name\n"
4ea42b18	222	"\t\tFUNC:\tFunction name\n"
2a9c8c36	223	"\t\tOFF:\tOffset from function entry (in byte)\n"
253977b0	224	"\t\t%return:\tPut the probe at function return\n"
4b4da7f7	225	#ifdef DWARF_SUPPORT
4ea42b18	226	"\t\tSRC:\tSource code path\n"
2a9c8c36 MH	227	"\t\tRL:\tRelative line number from function entry.\n"
	228	"\t\tAL:\tAbsolute line number in file.\n"
	229	"\t\tPT:\tLazy expression of line code.\n"
4ea42b18	230	"\t\tARG:\tProbe argument (local variable name or\n"
50656eec	231	"\t\t\tkprobe-tracer argument format.)\n",
4b4da7f7 MH	232	#else
	233	"\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n",
	234	#endif
253977b0	235	opt_add_probe_event),
12a1fadb	236	OPT_BOOLEAN('f', "force", &params.force_add, "forcibly add events"
d761b08b	237	" with existing name"),
4b4da7f7	238	#ifdef DWARF_SUPPORT
631c9def	239	OPT_CALLBACK('L', "line", NULL,
085ea739	240	"FUNC[:RLN[+NUM\|-RLN2]]\|SRC:ALN[+NUM\|-ALN2]",
631c9def	241	"Show source code lines.", opt_show_lines),
cf6eb489 MH	242	OPT_CALLBACK('V', "vars", NULL,
	243	"FUNC[@SRC][+OFF\|%return\|:RL\|;PT]\|SRC:AL\|SRC;PT",
	244	"Show accessible variables on PROBEDEF", opt_show_vars),
fb8c5a56 MH	245	OPT_BOOLEAN('\0', "externs", &params.show_ext_vars,
fb8c5a56 MH	246	"Show external variables too (with --vars only)"),
4b4da7f7 MH	247	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
4b4da7f7 MH	248	"file", "vmlinux pathname"),
9ed7e1b8 CD	249	OPT_STRING('s', "source", &symbol_conf.source_prefix,
9ed7e1b8 CD	250	"directory", "path to kernel source"),
469b9b88	251	OPT_STRING('m', "module", &params.target_module,
14a8fd7c MH	252	"modname\|path",
14a8fd7c MH	253	"target module name (for online) or path (for offline)"),
631c9def	254	#endif
f4d7da49	255	OPT__DRY_RUN(&probe_event_dry_run),
ef4a3565 MH	256	OPT_INTEGER('\0', "max-probes", &params.max_probe_points,
ef4a3565 MH	257	"Set how many probe points can be found for a probe."),
e80711ca MH	258	OPT_BOOLEAN('F', "funcs", &params.show_funcs,
e80711ca MH	259	"Show potential probe-able functions."),
3c42258c MH	260	OPT_CALLBACK('\0', "filter", NULL,
	261	"[!]FILTER", "Set a filter (with --vars/funcs only)\n"
	262	"\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"
	263	"\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)",
	264	opt_set_filter),
4ea42b18 MH	265	OPT_END()
	266	};
	267
4ea42b18 MH	268	int cmd_probe(int argc, const char *argv, const char prefix __used)
4ea42b18 MH	269	{
146a1439 MH	270	int ret;
146a1439 MH	271
4ea42b18	272	argc = parse_options(argc, argv, options, probe_usage,
46ab4926	273	PARSE_OPT_STOP_AT_NON_OPTION);
ce11a603 MH	274	if (argc > 0) {
	275	if (strcmp(argv[0], "-") == 0) {
	276	pr_warning(" Error: '-' is not supported.\n");
	277	usage_with_options(probe_usage, options);
	278	}
146a1439 MH	279	ret = parse_probe_event_argv(argc, argv);
	280	if (ret < 0) {
	281	pr_err(" Error: Parse Error. (%d)\n", ret);
	282	return ret;
	283	}
ce11a603	284	}
46ab4926	285
ef4a3565 MH	286	if (params.max_probe_points == 0)
	287	params.max_probe_points = MAX_PROBES;
	288
4235b045	289	if ((!params.nevents && !params.dellist && !params.list_events &&
e80711ca	290	!params.show_lines && !params.show_funcs))
4ea42b18 MH	291	usage_with_options(probe_usage, options);
4ea42b18 MH	292
fd930ff9 FBH	293	/*
	294	* Only consider the user's kernel image path if given.
	295	*/
	296	symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
	297
12a1fadb	298	if (params.list_events) {
cf6eb489	299	if (params.mod_events) {
146a1439	300	pr_err(" Error: Don't use --list with --add/--del.\n");
fa28244d MH	301	usage_with_options(probe_usage, options);
fa28244d MH	302	}
12a1fadb	303	if (params.show_lines) {
146a1439	304	pr_err(" Error: Don't use --list with --line.\n");
631c9def MH	305	usage_with_options(probe_usage, options);
631c9def MH	306	}
cf6eb489 MH	307	if (params.show_vars) {
	308	pr_err(" Error: Don't use --list with --vars.\n");
	309	usage_with_options(probe_usage, options);
	310	}
e80711ca MH	311	if (params.show_funcs) {
	312	pr_err(" Error: Don't use --list with --funcs.\n");
	313	usage_with_options(probe_usage, options);
	314	}
146a1439 MH	315	ret = show_perf_probe_events();
	316	if (ret < 0)
	317	pr_err(" Error: Failed to show event list. (%d)\n",
	318	ret);
	319	return ret;
4de189fe	320	}
e80711ca MH	321	if (params.show_funcs) {
	322	if (params.nevents != 0 \|\| params.dellist) {
	323	pr_err(" Error: Don't use --funcs with"
	324	" --add/--del.\n");
	325	usage_with_options(probe_usage, options);
	326	}
	327	if (params.show_lines) {
	328	pr_err(" Error: Don't use --funcs with --line.\n");
	329	usage_with_options(probe_usage, options);
	330	}
	331	if (params.show_vars) {
	332	pr_err(" Error: Don't use --funcs with --vars.\n");
	333	usage_with_options(probe_usage, options);
	334	}
3c42258c MH	335	if (!params.filter)
	336	params.filter = strfilter__new(DEFAULT_FUNC_FILTER,
	337	NULL);
	338	ret = show_available_funcs(params.target_module,
	339	params.filter);
	340	strfilter__delete(params.filter);
e80711ca MH	341	if (ret < 0)
	342	pr_err(" Error: Failed to show functions."
	343	" (%d)\n", ret);
	344	return ret;
	345	}
4de189fe	346
4b4da7f7	347	#ifdef DWARF_SUPPORT
12a1fadb	348	if (params.show_lines) {
cf6eb489 MH	349	if (params.mod_events) {
	350	pr_err(" Error: Don't use --line with"
	351	" --add/--del.\n");
	352	usage_with_options(probe_usage, options);
	353	}
	354	if (params.show_vars) {
	355	pr_err(" Error: Don't use --line with --vars.\n");
631c9def MH	356	usage_with_options(probe_usage, options);
631c9def MH	357	}
e0faa8d3	358
469b9b88	359	ret = show_line_range(&params.line_range, params.target_module);
146a1439 MH	360	if (ret < 0)
	361	pr_err(" Error: Failed to show lines. (%d)\n", ret);
	362	return ret;
631c9def	363	}
cf6eb489 MH	364	if (params.show_vars) {
	365	if (params.mod_events) {
	366	pr_err(" Error: Don't use --vars with"
	367	" --add/--del.\n");
	368	usage_with_options(probe_usage, options);
	369	}
bd09d7b5 MH	370	if (!params.filter)
	371	params.filter = strfilter__new(DEFAULT_VAR_FILTER,
	372	NULL);
	373
cf6eb489	374	ret = show_available_vars(params.events, params.nevents,
fb8c5a56	375	params.max_probe_points,
469b9b88	376	params.target_module,
bd09d7b5	377	params.filter,
fb8c5a56	378	params.show_ext_vars);
bd09d7b5	379	strfilter__delete(params.filter);
cf6eb489 MH	380	if (ret < 0)
	381	pr_err(" Error: Failed to show vars. (%d)\n", ret);
	382	return ret;
	383	}
631c9def MH	384	#endif
631c9def MH	385
12a1fadb	386	if (params.dellist) {
146a1439	387	ret = del_perf_probe_events(params.dellist);
12a1fadb	388	strlist__delete(params.dellist);
146a1439 MH	389	if (ret < 0) {
	390	pr_err(" Error: Failed to delete events. (%d)\n", ret);
	391	return ret;
	392	}
fa28244d MH	393	}
fa28244d MH	394
146a1439 MH	395	if (params.nevents) {
146a1439 MH	396	ret = add_perf_probe_events(params.events, params.nevents,
c82ec0a2	397	params.max_probe_points,
469b9b88	398	params.target_module,
c82ec0a2	399	params.force_add);
146a1439 MH	400	if (ret < 0) {
	401	pr_err(" Error: Failed to add events. (%d)\n", ret);
	402	return ret;
	403	}
	404	}
4ea42b18 MH	405	return 0;
4ea42b18 MH	406	}