[GitHub/mt8127/android_kernel_alcatel_ttab.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.
 *
 */
#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>

#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;
	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,
		   "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,
					   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);
		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,
					  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,
					    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	*/
4ea42b18 MH	23	#include <sys/utsname.h>
	24	#include <sys/types.h>
	25	#include <sys/stat.h>
	26	#include <fcntl.h>
	27	#include <errno.h>
	28	#include <stdio.h>
	29	#include <unistd.h>
	30	#include <stdlib.h>
	31	#include <string.h>
	32
4ea42b18 MH	33	#include "perf.h"
	34	#include "builtin.h"
	35	#include "util/util.h"
fa28244d	36	#include "util/strlist.h"
bd09d7b5	37	#include "util/strfilter.h"
e0faa8d3	38	#include "util/symbol.h"
89c69c0e	39	#include "util/debug.h"
96c96612	40	#include "util/debugfs.h"
4ea42b18	41	#include "util/parse-options.h"
4ea42b18	42	#include "util/probe-finder.h"
50656eec	43	#include "util/probe-event.h"
4ea42b18	44
bd09d7b5	45	#define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
3c42258c	46	#define DEFAULT_FUNC_FILTER "!_*"
4ea42b18 MH	47
	48	/* Session management structure */
	49	static struct {
fac13fd5	50	bool list_events;
d761b08b	51	bool force_add;
631c9def	52	bool show_lines;
cf6eb489	53	bool show_vars;
fb8c5a56	54	bool show_ext_vars;
e80711ca	55	bool show_funcs;
cf6eb489	56	bool mod_events;
4235b045 MH	57	int nevents;
4235b045 MH	58	struct perf_probe_event events[MAX_PROBES];
fa28244d	59	struct strlist *dellist;
631c9def	60	struct line_range line_range;
4eced234	61	const char *target;
ef4a3565	62	int max_probe_points;
bd09d7b5	63	struct strfilter *filter;
12a1fadb	64	} params;
4ea42b18	65
253977b0	66	/* Parse an event definition. Note that any error must die. */
146a1439	67	static int parse_probe_event(const char *str)
4ea42b18	68	{
4235b045	69	struct perf_probe_event *pev = &params.events[params.nevents];
146a1439	70	int ret;
4ea42b18	71
4235b045	72	pr_debug("probe-definition(%d): %s\n", params.nevents, str);
8a7ddad8 ACM	73	if (++params.nevents == MAX_PROBES) {
	74	pr_err("Too many probes (> %d) were specified.", MAX_PROBES);
	75	return -1;
	76	}
4ea42b18	77
4235b045	78	/* Parse a perf-probe command into event */
146a1439	79	ret = parse_perf_probe_command(str, pev);
4235b045	80	pr_debug("%d arguments\n", pev->nargs);
146a1439 MH	81
146a1439 MH	82	return ret;
46ab4926 MH	83	}
46ab4926 MH	84
146a1439	85	static int parse_probe_event_argv(int argc, const char **argv)
d1bde3f7	86	{
146a1439	87	int i, len, ret;
d1bde3f7 MH	88	char *buf;
	89
	90	/* Bind up rest arguments */
	91	len = 0;
	92	for (i = 0; i < argc; i++)
	93	len += strlen(argv[i]) + 1;
8a7ddad8 ACM	94	buf = zalloc(len + 1);
	95	if (buf == NULL)
	96	return -ENOMEM;
d1bde3f7 MH	97	len = 0;
	98	for (i = 0; i < argc; i++)
	99	len += sprintf(&buf[len], "%s ", argv[i]);
cf6eb489	100	params.mod_events = true;
146a1439	101	ret = parse_probe_event(buf);
d1bde3f7	102	free(buf);
146a1439	103	return ret;
d1bde3f7 MH	104	}
d1bde3f7 MH	105
253977b0	106	static int opt_add_probe_event(const struct option *opt __used,
46ab4926 MH	107	const char *str, int unset __used)
46ab4926 MH	108	{
cf6eb489 MH	109	if (str) {
cf6eb489 MH	110	params.mod_events = true;
146a1439	111	return parse_probe_event(str);
cf6eb489	112	} else
146a1439	113	return 0;
4ea42b18 MH	114	}
4ea42b18 MH	115
fa28244d MH	116	static int opt_del_probe_event(const struct option *opt __used,
	117	const char *str, int unset __used)
	118	{
	119	if (str) {
cf6eb489	120	params.mod_events = true;
12a1fadb MH	121	if (!params.dellist)
	122	params.dellist = strlist__new(true, NULL);
	123	strlist__add(params.dellist, str);
fa28244d MH	124	}
	125	return 0;
	126	}
	127
4b4da7f7	128	#ifdef DWARF_SUPPORT
0eda7385 HM	129	static int opt_show_lines(const struct option *opt __used,
	130	const char *str, int unset __used)
	131	{
146a1439 MH	132	int ret = 0;
146a1439 MH	133
13e27d76 MH	134	if (!str)
	135	return 0;
	136
	137	if (params.show_lines) {
	138	pr_warning("Warning: more than one --line options are"
	139	" detected. Only the first one is valid.\n");
	140	return 0;
	141	}
	142
12a1fadb	143	params.show_lines = true;
13e27d76 MH	144	ret = parse_line_range_desc(str, &params.line_range);
13e27d76 MH	145	INIT_LIST_HEAD(&params.line_range.line_list);
146a1439 MH	146
146a1439 MH	147	return ret;
0eda7385	148	}
cf6eb489 MH	149
	150	static int opt_show_vars(const struct option *opt __used,
	151	const char *str, int unset __used)
	152	{
	153	struct perf_probe_event *pev = &params.events[params.nevents];
	154	int ret;
	155
	156	if (!str)
	157	return 0;
	158
	159	ret = parse_probe_event(str);
	160	if (!ret && pev->nargs != 0) {
	161	pr_err(" Error: '--vars' doesn't accept arguments.\n");
	162	return -EINVAL;
	163	}
	164	params.show_vars = true;
	165
	166	return ret;
	167	}
3c42258c	168	#endif
bd09d7b5 MH	169
	170	static int opt_set_filter(const struct option *opt __used,
	171	const char *str, int unset __used)
	172	{
	173	const char *err;
	174
	175	if (str) {
	176	pr_debug2("Set filter: %s\n", str);
	177	if (params.filter)
	178	strfilter__delete(params.filter);
	179	params.filter = strfilter__new(str, &err);
	180	if (!params.filter) {
823c7164	181	pr_err("Filter parse error at %td.\n", err - str + 1);
bd09d7b5 MH	182	pr_err("Source: \"%s\"\n", str);
	183	pr_err(" %*c\n", (int)(err - str + 1), '^');
	184	return -EINVAL;
	185	}
	186	}
	187
	188	return 0;
	189	}
4ea42b18 MH	190
4ea42b18 MH	191	static const char * const probe_usage[] = {
46ab4926 MH	192	"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
46ab4926 MH	193	"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
fa28244d	194	"perf probe [<options>] --del '[GROUP:]EVENT' ...",
4de189fe	195	"perf probe --list",
4b4da7f7	196	#ifdef DWARF_SUPPORT
469b9b88 MH	197	"perf probe [<options>] --line 'LINEDESC'",
469b9b88 MH	198	"perf probe [<options>] --vars 'PROBEPOINT'",
f3ab481c	199	#endif
4ea42b18 MH	200	NULL
	201	};
	202
	203	static const struct option options[] = {
c0555642	204	OPT_INCR('v', "verbose", &verbose,
89c69c0e	205	"be more verbose (show parsed arguments, etc)"),
12a1fadb	206	OPT_BOOLEAN('l', "list", &params.list_events,
fac13fd5	207	"list up current probe events"),
fa28244d MH	208	OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.",
fa28244d MH	209	opt_del_probe_event),
46ab4926	210	OPT_CALLBACK('a', "add", NULL,
4b4da7f7	211	#ifdef DWARF_SUPPORT
32cb0dd5	212	"[EVENT=]FUNC[@SRC][+OFF\|%return\|:RL\|;PT]\|SRC:AL\|SRC;PT"
48481938	213	" [[NAME=]ARG ...]",
4b4da7f7	214	#else
48481938	215	"[EVENT=]FUNC[+OFF\|%return] [[NAME=]ARG ...]",
23e8ec0d	216	#endif
4ea42b18	217	"probe point definition, where\n"
af663d75 MH	218	"\t\tGROUP:\tGroup name (optional)\n"
af663d75 MH	219	"\t\tEVENT:\tEvent name\n"
4ea42b18	220	"\t\tFUNC:\tFunction name\n"
2a9c8c36	221	"\t\tOFF:\tOffset from function entry (in byte)\n"
253977b0	222	"\t\t%return:\tPut the probe at function return\n"
4b4da7f7	223	#ifdef DWARF_SUPPORT
4ea42b18	224	"\t\tSRC:\tSource code path\n"
2a9c8c36 MH	225	"\t\tRL:\tRelative line number from function entry.\n"
	226	"\t\tAL:\tAbsolute line number in file.\n"
	227	"\t\tPT:\tLazy expression of line code.\n"
4ea42b18	228	"\t\tARG:\tProbe argument (local variable name or\n"
50656eec	229	"\t\t\tkprobe-tracer argument format.)\n",
4b4da7f7 MH	230	#else
	231	"\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n",
	232	#endif
253977b0	233	opt_add_probe_event),
12a1fadb	234	OPT_BOOLEAN('f', "force", &params.force_add, "forcibly add events"
d761b08b	235	" with existing name"),
4b4da7f7	236	#ifdef DWARF_SUPPORT
631c9def	237	OPT_CALLBACK('L', "line", NULL,
085ea739	238	"FUNC[:RLN[+NUM\|-RLN2]]\|SRC:ALN[+NUM\|-ALN2]",
631c9def	239	"Show source code lines.", opt_show_lines),
cf6eb489 MH	240	OPT_CALLBACK('V', "vars", NULL,
	241	"FUNC[@SRC][+OFF\|%return\|:RL\|;PT]\|SRC:AL\|SRC;PT",
	242	"Show accessible variables on PROBEDEF", opt_show_vars),
fb8c5a56 MH	243	OPT_BOOLEAN('\0', "externs", &params.show_ext_vars,
fb8c5a56 MH	244	"Show external variables too (with --vars only)"),
4b4da7f7 MH	245	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
4b4da7f7 MH	246	"file", "vmlinux pathname"),
9ed7e1b8 CD	247	OPT_STRING('s', "source", &symbol_conf.source_prefix,
9ed7e1b8 CD	248	"directory", "path to kernel source"),
4eced234	249	OPT_STRING('m', "module", &params.target,
14a8fd7c MH	250	"modname\|path",
14a8fd7c MH	251	"target module name (for online) or path (for offline)"),
631c9def	252	#endif
f4d7da49	253	OPT__DRY_RUN(&probe_event_dry_run),
ef4a3565 MH	254	OPT_INTEGER('\0', "max-probes", &params.max_probe_points,
ef4a3565 MH	255	"Set how many probe points can be found for a probe."),
e80711ca MH	256	OPT_BOOLEAN('F', "funcs", &params.show_funcs,
e80711ca MH	257	"Show potential probe-able functions."),
3c42258c MH	258	OPT_CALLBACK('\0', "filter", NULL,
	259	"[!]FILTER", "Set a filter (with --vars/funcs only)\n"
	260	"\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"
	261	"\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)",
	262	opt_set_filter),
4ea42b18 MH	263	OPT_END()
	264	};
	265
4ea42b18 MH	266	int cmd_probe(int argc, const char *argv, const char prefix __used)
4ea42b18 MH	267	{
146a1439 MH	268	int ret;
146a1439 MH	269
4ea42b18	270	argc = parse_options(argc, argv, options, probe_usage,
46ab4926	271	PARSE_OPT_STOP_AT_NON_OPTION);
ce11a603 MH	272	if (argc > 0) {
	273	if (strcmp(argv[0], "-") == 0) {
	274	pr_warning(" Error: '-' is not supported.\n");
	275	usage_with_options(probe_usage, options);
	276	}
146a1439 MH	277	ret = parse_probe_event_argv(argc, argv);
	278	if (ret < 0) {
	279	pr_err(" Error: Parse Error. (%d)\n", ret);
	280	return ret;
	281	}
ce11a603	282	}
46ab4926	283
ef4a3565 MH	284	if (params.max_probe_points == 0)
	285	params.max_probe_points = MAX_PROBES;
	286
4235b045	287	if ((!params.nevents && !params.dellist && !params.list_events &&
e80711ca	288	!params.show_lines && !params.show_funcs))
4ea42b18 MH	289	usage_with_options(probe_usage, options);
4ea42b18 MH	290
fd930ff9 FBH	291	/*
	292	* Only consider the user's kernel image path if given.
	293	*/
	294	symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
	295
12a1fadb	296	if (params.list_events) {
cf6eb489	297	if (params.mod_events) {
146a1439	298	pr_err(" Error: Don't use --list with --add/--del.\n");
fa28244d MH	299	usage_with_options(probe_usage, options);
fa28244d MH	300	}
12a1fadb	301	if (params.show_lines) {
146a1439	302	pr_err(" Error: Don't use --list with --line.\n");
631c9def MH	303	usage_with_options(probe_usage, options);
631c9def MH	304	}
cf6eb489 MH	305	if (params.show_vars) {
	306	pr_err(" Error: Don't use --list with --vars.\n");
	307	usage_with_options(probe_usage, options);
	308	}
e80711ca MH	309	if (params.show_funcs) {
	310	pr_err(" Error: Don't use --list with --funcs.\n");
	311	usage_with_options(probe_usage, options);
	312	}
146a1439 MH	313	ret = show_perf_probe_events();
	314	if (ret < 0)
	315	pr_err(" Error: Failed to show event list. (%d)\n",
	316	ret);
	317	return ret;
4de189fe	318	}
e80711ca MH	319	if (params.show_funcs) {
	320	if (params.nevents != 0 \|\| params.dellist) {
	321	pr_err(" Error: Don't use --funcs with"
	322	" --add/--del.\n");
	323	usage_with_options(probe_usage, options);
	324	}
	325	if (params.show_lines) {
	326	pr_err(" Error: Don't use --funcs with --line.\n");
	327	usage_with_options(probe_usage, options);
	328	}
	329	if (params.show_vars) {
	330	pr_err(" Error: Don't use --funcs with --vars.\n");
	331	usage_with_options(probe_usage, options);
	332	}
3c42258c MH	333	if (!params.filter)
	334	params.filter = strfilter__new(DEFAULT_FUNC_FILTER,
	335	NULL);
4eced234	336	ret = show_available_funcs(params.target,
3c42258c MH	337	params.filter);
3c42258c MH	338	strfilter__delete(params.filter);
e80711ca MH	339	if (ret < 0)
	340	pr_err(" Error: Failed to show functions."
	341	" (%d)\n", ret);
	342	return ret;
	343	}
4de189fe	344
4b4da7f7	345	#ifdef DWARF_SUPPORT
12a1fadb	346	if (params.show_lines) {
cf6eb489 MH	347	if (params.mod_events) {
	348	pr_err(" Error: Don't use --line with"
	349	" --add/--del.\n");
	350	usage_with_options(probe_usage, options);
	351	}
	352	if (params.show_vars) {
	353	pr_err(" Error: Don't use --line with --vars.\n");
631c9def MH	354	usage_with_options(probe_usage, options);
631c9def MH	355	}
e0faa8d3	356
4eced234	357	ret = show_line_range(&params.line_range, params.target);
146a1439 MH	358	if (ret < 0)
	359	pr_err(" Error: Failed to show lines. (%d)\n", ret);
	360	return ret;
631c9def	361	}
cf6eb489 MH	362	if (params.show_vars) {
	363	if (params.mod_events) {
	364	pr_err(" Error: Don't use --vars with"
	365	" --add/--del.\n");
	366	usage_with_options(probe_usage, options);
	367	}
bd09d7b5 MH	368	if (!params.filter)
	369	params.filter = strfilter__new(DEFAULT_VAR_FILTER,
	370	NULL);
	371
cf6eb489	372	ret = show_available_vars(params.events, params.nevents,
fb8c5a56	373	params.max_probe_points,
4eced234	374	params.target,
bd09d7b5	375	params.filter,
fb8c5a56	376	params.show_ext_vars);
bd09d7b5	377	strfilter__delete(params.filter);
cf6eb489 MH	378	if (ret < 0)
	379	pr_err(" Error: Failed to show vars. (%d)\n", ret);
	380	return ret;
	381	}
631c9def MH	382	#endif
631c9def MH	383
12a1fadb	384	if (params.dellist) {
146a1439	385	ret = del_perf_probe_events(params.dellist);
12a1fadb	386	strlist__delete(params.dellist);
146a1439 MH	387	if (ret < 0) {
	388	pr_err(" Error: Failed to delete events. (%d)\n", ret);
	389	return ret;
	390	}
fa28244d MH	391	}
fa28244d MH	392
146a1439 MH	393	if (params.nevents) {
146a1439 MH	394	ret = add_perf_probe_events(params.events, params.nevents,
c82ec0a2	395	params.max_probe_points,
4eced234	396	params.target,
c82ec0a2	397	params.force_add);
146a1439 MH	398	if (ret < 0) {
	399	pr_err(" Error: Failed to add events. (%d)\n", ret);
	400	return ret;
	401	}
	402	}
4ea42b18 MH	403	return 0;
4ea42b18 MH	404	}