2009-10-08 23:17:38 +02:00
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/*
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* builtin-probe.c
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*
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* Builtin probe command: Set up probe events by C expression
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*
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* Written by Masami Hiramatsu <mhiramat@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include <sys/utsname.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include "perf.h"
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#include "builtin.h"
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#include "util/util.h"
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2009-12-08 23:03:23 +01:00
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#include "util/strlist.h"
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2011-01-20 15:15:39 +01:00
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#include "util/strfilter.h"
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2010-03-16 23:05:37 +01:00
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#include "util/symbol.h"
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2009-10-17 02:08:10 +02:00
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#include "util/debug.h"
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2013-12-09 17:14:23 +01:00
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#include <api/fs/debugfs.h>
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2009-10-08 23:17:38 +02:00
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#include "util/parse-options.h"
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#include "util/probe-finder.h"
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2009-12-01 01:19:58 +01:00
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#include "util/probe-event.h"
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2009-10-08 23:17:38 +02:00
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2011-01-20 15:15:39 +01:00
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#define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
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2011-01-20 15:15:45 +01:00
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#define DEFAULT_FUNC_FILTER "!_*"
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2015-04-24 11:47:50 +02:00
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#define DEFAULT_LIST_FILTER "*:*"
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2009-10-08 23:17:38 +02:00
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/* Session management structure */
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static struct {
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2015-05-05 17:22:57 +02:00
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int command; /* Command short_name */
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2009-12-15 16:31:14 +01:00
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bool list_events;
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2012-04-16 14:09:09 +02:00
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bool uprobes;
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2014-10-27 21:31:31 +01:00
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bool quiet;
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2015-04-01 12:25:42 +02:00
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bool target_used;
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2010-03-16 23:06:12 +01:00
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int nevents;
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struct perf_probe_event events[MAX_PROBES];
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2010-01-06 15:45:34 +01:00
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struct line_range line_range;
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2014-01-16 10:39:47 +01:00
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char *target;
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2011-01-20 15:15:39 +01:00
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struct strfilter *filter;
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2010-03-16 23:05:44 +01:00
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} params;
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2009-10-08 23:17:38 +02:00
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2009-10-27 21:43:10 +01:00
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/* Parse an event definition. Note that any error must die. */
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2010-04-12 19:17:42 +02:00
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static int parse_probe_event(const char *str)
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2009-10-08 23:17:38 +02:00
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{
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2010-03-16 23:06:12 +01:00
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struct perf_probe_event *pev = ¶ms.events[params.nevents];
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2010-04-12 19:17:42 +02:00
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int ret;
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2009-10-08 23:17:38 +02:00
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2010-03-16 23:06:12 +01:00
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pr_debug("probe-definition(%d): %s\n", params.nevents, str);
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2010-05-19 03:57:27 +02:00
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if (++params.nevents == MAX_PROBES) {
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pr_err("Too many probes (> %d) were specified.", MAX_PROBES);
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return -1;
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}
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2009-10-08 23:17:38 +02:00
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2012-04-16 14:09:09 +02:00
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pev->uprobes = params.uprobes;
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2015-04-01 12:25:39 +02:00
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if (params.target) {
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pev->target = strdup(params.target);
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if (!pev->target)
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return -ENOMEM;
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2015-04-01 12:25:42 +02:00
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params.target_used = true;
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2015-04-01 12:25:39 +02:00
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}
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2012-04-16 14:09:09 +02:00
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2010-03-16 23:06:12 +01:00
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/* Parse a perf-probe command into event */
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2010-04-12 19:17:42 +02:00
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ret = parse_perf_probe_command(str, pev);
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2010-03-16 23:06:12 +01:00
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pr_debug("%d arguments\n", pev->nargs);
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2010-04-12 19:17:42 +02:00
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return ret;
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2009-10-27 21:43:02 +01:00
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}
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2015-04-24 11:47:50 +02:00
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static int params_add_filter(const char *str)
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{
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const char *err = NULL;
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int ret = 0;
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pr_debug2("Add filter: %s\n", str);
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if (!params.filter) {
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params.filter = strfilter__new(str, &err);
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if (!params.filter)
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ret = err ? -EINVAL : -ENOMEM;
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} else
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ret = strfilter__or(params.filter, str, &err);
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if (ret == -EINVAL) {
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pr_err("Filter parse error at %td.\n", err - str + 1);
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pr_err("Source: \"%s\"\n", str);
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pr_err(" %*c\n", (int)(err - str + 1), '^');
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}
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return ret;
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}
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2012-04-16 14:09:25 +02:00
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static int set_target(const char *ptr)
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{
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int found = 0;
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const char *buf;
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/*
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* The first argument after options can be an absolute path
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* to an executable / library or kernel module.
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*
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* TODO: Support relative path, and $PATH, $LD_LIBRARY_PATH,
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* short module name.
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*/
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if (!params.target && ptr && *ptr == '/') {
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2014-01-16 10:39:47 +01:00
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params.target = strdup(ptr);
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if (!params.target)
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return -ENOMEM;
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2015-04-01 12:25:42 +02:00
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params.target_used = false;
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2014-01-16 10:39:47 +01:00
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2012-04-16 14:09:25 +02:00
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found = 1;
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buf = ptr + (strlen(ptr) - 3);
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if (strcmp(buf, ".ko"))
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params.uprobes = true;
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}
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return found;
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}
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2010-04-12 19:17:42 +02:00
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static int parse_probe_event_argv(int argc, const char **argv)
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2009-12-08 23:02:54 +01:00
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{
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2012-04-16 14:09:25 +02:00
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int i, len, ret, found_target;
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2009-12-08 23:02:54 +01:00
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char *buf;
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2012-04-16 14:09:25 +02:00
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found_target = set_target(argv[0]);
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2014-01-16 10:39:47 +01:00
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if (found_target < 0)
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return found_target;
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2012-04-16 14:09:25 +02:00
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if (found_target && argc == 1)
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return 0;
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2009-12-08 23:02:54 +01:00
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/* Bind up rest arguments */
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len = 0;
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2012-04-16 14:09:25 +02:00
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for (i = 0; i < argc; i++) {
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if (i == 0 && found_target)
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continue;
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2009-12-08 23:02:54 +01:00
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len += strlen(argv[i]) + 1;
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2012-04-16 14:09:25 +02:00
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}
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2010-05-19 03:57:27 +02:00
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buf = zalloc(len + 1);
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if (buf == NULL)
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return -ENOMEM;
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2009-12-08 23:02:54 +01:00
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len = 0;
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2012-04-16 14:09:25 +02:00
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for (i = 0; i < argc; i++) {
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if (i == 0 && found_target)
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continue;
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2009-12-08 23:02:54 +01:00
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len += sprintf(&buf[len], "%s ", argv[i]);
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2012-04-16 14:09:25 +02:00
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}
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2010-04-12 19:17:42 +02:00
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ret = parse_probe_event(buf);
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2009-12-08 23:02:54 +01:00
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free(buf);
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2010-04-12 19:17:42 +02:00
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return ret;
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2009-12-08 23:02:54 +01:00
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}
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2012-04-16 14:09:09 +02:00
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static int opt_set_target(const struct option *opt, const char *str,
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2012-09-11 00:15:03 +02:00
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int unset __maybe_unused)
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2012-04-16 14:09:09 +02:00
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{
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int ret = -ENOENT;
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2013-12-26 06:41:50 +01:00
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char *tmp;
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2012-04-16 14:09:09 +02:00
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2015-04-01 12:25:39 +02:00
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if (str) {
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2012-04-16 14:09:09 +02:00
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if (!strcmp(opt->long_name, "exec"))
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params.uprobes = true;
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2013-09-30 12:07:11 +02:00
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#ifdef HAVE_DWARF_SUPPORT
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2012-04-16 14:09:09 +02:00
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else if (!strcmp(opt->long_name, "module"))
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params.uprobes = false;
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#endif
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else
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return ret;
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2013-12-26 06:41:50 +01:00
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/* Expand given path to absolute path, except for modulename */
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if (params.uprobes || strchr(str, '/')) {
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tmp = realpath(str, NULL);
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if (!tmp) {
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pr_warning("Failed to get the absolute path of %s: %m\n", str);
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return ret;
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}
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} else {
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tmp = strdup(str);
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if (!tmp)
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return -ENOMEM;
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}
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2015-04-01 12:25:39 +02:00
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free(params.target);
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2013-12-26 06:41:50 +01:00
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params.target = tmp;
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2015-04-01 12:25:42 +02:00
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params.target_used = false;
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2012-04-16 14:09:09 +02:00
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ret = 0;
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}
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return ret;
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}
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2015-05-05 17:22:57 +02:00
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/* Command option callbacks */
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2013-09-30 12:07:11 +02:00
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#ifdef HAVE_DWARF_SUPPORT
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2015-05-05 17:22:57 +02:00
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static int opt_show_lines(const struct option *opt,
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2012-09-11 00:15:03 +02:00
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const char *str, int unset __maybe_unused)
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2010-01-16 13:31:16 +01:00
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{
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2010-04-12 19:17:42 +02:00
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int ret = 0;
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2011-08-11 13:02:53 +02:00
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if (!str)
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return 0;
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2015-05-05 17:22:57 +02:00
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if (params.command == 'L') {
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2011-08-11 13:02:53 +02:00
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pr_warning("Warning: more than one --line options are"
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" detected. Only the first one is valid.\n");
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return 0;
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}
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2015-05-05 17:22:57 +02:00
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params.command = opt->short_name;
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2011-08-11 13:02:53 +02:00
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ret = parse_line_range_desc(str, ¶ms.line_range);
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2010-04-12 19:17:42 +02:00
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return ret;
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2010-01-16 13:31:16 +01:00
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}
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2010-10-21 12:13:23 +02:00
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2015-05-05 17:22:57 +02:00
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static int opt_show_vars(const struct option *opt,
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2012-09-11 00:15:03 +02:00
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const char *str, int unset __maybe_unused)
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2010-10-21 12:13:23 +02:00
|
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{
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struct perf_probe_event *pev = ¶ms.events[params.nevents];
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int ret;
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if (!str)
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return 0;
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ret = parse_probe_event(str);
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if (!ret && pev->nargs != 0) {
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pr_err(" Error: '--vars' doesn't accept arguments.\n");
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return -EINVAL;
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}
|
2015-05-05 17:22:57 +02:00
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params.command = opt->short_name;
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2010-10-21 12:13:23 +02:00
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return ret;
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}
|
2011-01-20 15:15:45 +01:00
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#endif
|
2015-05-05 17:22:57 +02:00
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static int opt_add_probe_event(const struct option *opt,
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const char *str, int unset __maybe_unused)
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{
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|
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if (str) {
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params.command = opt->short_name;
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return parse_probe_event(str);
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}
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return 0;
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}
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|
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static int opt_set_filter_with_command(const struct option *opt,
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|
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const char *str, int unset)
|
2015-05-05 04:29:50 +02:00
|
|
|
{
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|
|
|
if (!unset)
|
2015-05-05 17:22:57 +02:00
|
|
|
params.command = opt->short_name;
|
2015-05-05 04:29:50 +02:00
|
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|
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if (str)
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|
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return params_add_filter(str);
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|
return 0;
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|
|
|
}
|
2011-01-20 15:15:39 +01:00
|
|
|
|
2012-09-11 00:15:03 +02:00
|
|
|
static int opt_set_filter(const struct option *opt __maybe_unused,
|
|
|
|
const char *str, int unset __maybe_unused)
|
2011-01-20 15:15:39 +01:00
|
|
|
{
|
2015-04-24 11:47:50 +02:00
|
|
|
if (str)
|
|
|
|
return params_add_filter(str);
|
2011-01-20 15:15:39 +01:00
|
|
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|
2015-04-24 11:47:50 +02:00
|
|
|
return 0;
|
2011-01-20 15:15:39 +01:00
|
|
|
}
|
2009-10-08 23:17:38 +02:00
|
|
|
|
2014-02-06 06:32:09 +01:00
|
|
|
static int init_params(void)
|
2014-01-16 10:39:47 +01:00
|
|
|
{
|
2014-02-06 06:32:09 +01:00
|
|
|
return line_range__init(¶ms.line_range);
|
2014-01-16 10:39:47 +01:00
|
|
|
}
|
|
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|
|
static void cleanup_params(void)
|
|
|
|
{
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|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < params.nevents; i++)
|
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|
|
clear_perf_probe_event(params.events + i);
|
|
|
|
line_range__clear(¶ms.line_range);
|
|
|
|
free(params.target);
|
|
|
|
if (params.filter)
|
|
|
|
strfilter__delete(params.filter);
|
|
|
|
memset(¶ms, 0, sizeof(params));
|
|
|
|
}
|
|
|
|
|
2014-06-06 09:13:52 +02:00
|
|
|
static void pr_err_with_code(const char *msg, int err)
|
|
|
|
{
|
2014-08-14 04:22:34 +02:00
|
|
|
char sbuf[STRERR_BUFSIZE];
|
|
|
|
|
2014-06-06 09:13:52 +02:00
|
|
|
pr_err("%s", msg);
|
2014-08-14 04:22:34 +02:00
|
|
|
pr_debug(" Reason: %s (Code: %d)",
|
|
|
|
strerror_r(-err, sbuf, sizeof(sbuf)), err);
|
2014-06-06 09:13:52 +02:00
|
|
|
pr_err("\n");
|
|
|
|
}
|
|
|
|
|
2014-01-16 10:39:47 +01:00
|
|
|
static int
|
|
|
|
__cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
|
2012-10-01 20:20:58 +02:00
|
|
|
{
|
|
|
|
const char * const probe_usage[] = {
|
|
|
|
"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
|
|
|
|
"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
|
|
|
|
"perf probe [<options>] --del '[GROUP:]EVENT' ...",
|
2015-04-24 11:47:50 +02:00
|
|
|
"perf probe --list [GROUP:]EVENT ...",
|
2013-09-30 12:07:11 +02:00
|
|
|
#ifdef HAVE_DWARF_SUPPORT
|
2012-10-01 20:20:58 +02:00
|
|
|
"perf probe [<options>] --line 'LINEDESC'",
|
|
|
|
"perf probe [<options>] --vars 'PROBEPOINT'",
|
2010-02-25 14:35:12 +01:00
|
|
|
#endif
|
2015-04-23 15:46:12 +02:00
|
|
|
"perf probe [<options>] --funcs",
|
2012-10-01 20:20:58 +02:00
|
|
|
NULL
|
2015-04-24 11:47:50 +02:00
|
|
|
};
|
2014-10-22 17:15:49 +02:00
|
|
|
struct option options[] = {
|
2010-04-13 10:37:33 +02:00
|
|
|
OPT_INCR('v', "verbose", &verbose,
|
2009-10-17 02:08:10 +02:00
|
|
|
"be more verbose (show parsed arguments, etc)"),
|
2014-10-27 21:31:31 +01:00
|
|
|
OPT_BOOLEAN('q', "quiet", ¶ms.quiet,
|
|
|
|
"be quiet (do not show any mesages)"),
|
2015-04-24 11:47:50 +02:00
|
|
|
OPT_CALLBACK_DEFAULT('l', "list", NULL, "[GROUP:]EVENT",
|
2015-05-05 17:22:57 +02:00
|
|
|
"list up probe events",
|
|
|
|
opt_set_filter_with_command, DEFAULT_LIST_FILTER),
|
2009-12-08 23:03:23 +01:00
|
|
|
OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.",
|
2015-05-05 17:22:57 +02:00
|
|
|
opt_set_filter_with_command),
|
2009-10-27 21:43:02 +01:00
|
|
|
OPT_CALLBACK('a', "add", NULL,
|
2013-09-30 12:07:11 +02:00
|
|
|
#ifdef HAVE_DWARF_SUPPORT
|
2010-03-04 04:38:43 +01:00
|
|
|
"[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT"
|
2010-04-12 19:16:53 +02:00
|
|
|
" [[NAME=]ARG ...]",
|
2010-03-22 17:10:26 +01:00
|
|
|
#else
|
2010-04-12 19:16:53 +02:00
|
|
|
"[EVENT=]FUNC[+OFF|%return] [[NAME=]ARG ...]",
|
2009-10-08 00:28:30 +02:00
|
|
|
#endif
|
2009-10-08 23:17:38 +02:00
|
|
|
"probe point definition, where\n"
|
2009-12-15 16:32:18 +01:00
|
|
|
"\t\tGROUP:\tGroup name (optional)\n"
|
|
|
|
"\t\tEVENT:\tEvent name\n"
|
2009-10-08 23:17:38 +02:00
|
|
|
"\t\tFUNC:\tFunction name\n"
|
2010-02-25 14:36:12 +01:00
|
|
|
"\t\tOFF:\tOffset from function entry (in byte)\n"
|
2009-10-27 21:43:10 +01:00
|
|
|
"\t\t%return:\tPut the probe at function return\n"
|
2013-09-30 12:07:11 +02:00
|
|
|
#ifdef HAVE_DWARF_SUPPORT
|
2009-10-08 23:17:38 +02:00
|
|
|
"\t\tSRC:\tSource code path\n"
|
2010-02-25 14:36:12 +01:00
|
|
|
"\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"
|
2009-10-08 23:17:38 +02:00
|
|
|
"\t\tARG:\tProbe argument (local variable name or\n"
|
2009-12-01 01:19:58 +01:00
|
|
|
"\t\t\tkprobe-tracer argument format.)\n",
|
2010-03-22 17:10:26 +01:00
|
|
|
#else
|
|
|
|
"\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n",
|
|
|
|
#endif
|
2009-10-27 21:43:10 +01:00
|
|
|
opt_add_probe_event),
|
2015-05-08 03:03:31 +02:00
|
|
|
OPT_BOOLEAN('f', "force", &probe_conf.force_add, "forcibly add events"
|
2009-12-15 16:32:25 +01:00
|
|
|
" with existing name"),
|
2013-09-30 12:07:11 +02:00
|
|
|
#ifdef HAVE_DWARF_SUPPORT
|
2010-01-06 15:45:34 +01:00
|
|
|
OPT_CALLBACK('L', "line", NULL,
|
2010-04-02 18:50:39 +02:00
|
|
|
"FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]",
|
2010-01-06 15:45:34 +01:00
|
|
|
"Show source code lines.", opt_show_lines),
|
2010-10-21 12:13:23 +02:00
|
|
|
OPT_CALLBACK('V', "vars", NULL,
|
|
|
|
"FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT",
|
|
|
|
"Show accessible variables on PROBEDEF", opt_show_vars),
|
2015-05-08 03:03:31 +02:00
|
|
|
OPT_BOOLEAN('\0', "externs", &probe_conf.show_ext_vars,
|
2010-10-21 12:13:35 +02:00
|
|
|
"Show external variables too (with --vars only)"),
|
perf probe: Add --range option to show a variable's location range
It is not easy for users to get the accurate byte offset or the line
number where a local variable can be probed.
With '--range' option, local variables in the scope of the probe point
are showed with a byte offset range, and can be added according to this
range information.
For example, there are some variables in the function
generic_perform_write():
<generic_perform_write@mm/filemap.c:0>
0 ssize_t generic_perform_write(struct file *file,
1 struct iov_iter *i, loff_t pos)
2 {
3 struct address_space *mapping = file->f_mapping;
4 const struct address_space_operations *a_ops = mapping->a_ops;
...
42 status = a_ops->write_begin(file, mapping, pos, bytes, flags,
&page, &fsdata);
44 if (unlikely(status < 0))
But we fail when we try to probe the variable 'a_ops' at line 42 or 44.
$ perf probe --add 'generic_perform_write:42 a_ops'
Failed to find the location of a_ops at this address.
Perhaps, it has been optimized out.
This is because the source code do not match the assembly, so a variable
may not be available in the source code line where it appears.
After this patch, we can lookup the accurate byte offset range of a
variable, 'INV' indicates that this variable is not valid at the given
point, but available in the scope:
$ perf probe --vars 'generic_perform_write:42' --range
Available variables at generic_perform_write:42
@<generic_perform_write+141>
[INV] ssize_t written @<generic_perform_write+[324-331]>
[INV] struct address_space_operations* a_ops @<generic_perform_write+[55-61,170-176,223-246]>
[VAL] (unknown_type) fsdata @<generic_perform_write+[70-307,346-411]>
[VAL] loff_t pos @<generic_perform_write+[0-286,286-336,346-411]>
[VAL] long int status @<generic_perform_write+[83-342,346-411]>
[VAL] long unsigned int bytes @<generic_perform_write+[122-311,320-338,346-403,403-411]>
[VAL] struct address_space* mapping @<generic_perform_write+[35-344,346-411]>
[VAL] struct iov_iter* i @<generic_perform_write+[0-340,346-411]>
[VAL] struct page* page @<generic_perform_write+[70-307,346-411]>
Then it is more clear for us to add a probe with this variable:
$ perf probe --add 'generic_perform_write+170 a_ops'
Added new event:
probe:generic_perform_write (on generic_perform_write+170 with a_ops)
Signed-off-by: He Kuang <hekuang@huawei.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1431336304-16863-2-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-05-11 11:25:03 +02:00
|
|
|
OPT_BOOLEAN('\0', "range", &probe_conf.show_location_range,
|
|
|
|
"Show variables location range in scope (with --vars only)"),
|
2010-03-22 17:10:26 +01:00
|
|
|
OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
|
|
|
|
"file", "vmlinux pathname"),
|
2010-06-14 21:26:30 +02:00
|
|
|
OPT_STRING('s', "source", &symbol_conf.source_prefix,
|
|
|
|
"directory", "path to kernel source"),
|
2012-04-16 14:09:09 +02:00
|
|
|
OPT_CALLBACK('m', "module", NULL, "modname|path",
|
|
|
|
"target module name (for online) or path (for offline)",
|
|
|
|
opt_set_target),
|
2015-05-08 03:03:33 +02:00
|
|
|
OPT_BOOLEAN('\0', "no-inlines", &probe_conf.no_inlines,
|
|
|
|
"Don't search inlined functions"),
|
2010-01-06 15:45:34 +01:00
|
|
|
#endif
|
2010-03-16 23:06:05 +01:00
|
|
|
OPT__DRY_RUN(&probe_event_dry_run),
|
2015-05-08 03:03:31 +02:00
|
|
|
OPT_INTEGER('\0', "max-probes", &probe_conf.max_probes,
|
2010-04-21 21:56:40 +02:00
|
|
|
"Set how many probe points can be found for a probe."),
|
2015-05-05 04:29:50 +02:00
|
|
|
OPT_CALLBACK_DEFAULT('F', "funcs", NULL, "[FILTER]",
|
|
|
|
"Show potential probe-able functions.",
|
2015-05-05 17:22:57 +02:00
|
|
|
opt_set_filter_with_command, DEFAULT_FUNC_FILTER),
|
2011-01-20 15:15:45 +01:00
|
|
|
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),
|
2012-04-16 14:09:09 +02:00
|
|
|
OPT_CALLBACK('x', "exec", NULL, "executable|path",
|
|
|
|
"target executable name or path", opt_set_target),
|
2013-10-28 09:04:24 +01:00
|
|
|
OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
|
2014-10-27 21:31:24 +01:00
|
|
|
"Enable symbol demangling"),
|
2014-09-13 06:15:05 +02:00
|
|
|
OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
|
|
|
|
"Enable kernel symbol demangling"),
|
2009-10-08 23:17:38 +02:00
|
|
|
OPT_END()
|
2012-10-01 20:20:58 +02:00
|
|
|
};
|
2010-04-12 19:17:42 +02:00
|
|
|
int ret;
|
|
|
|
|
2014-10-22 17:15:49 +02:00
|
|
|
set_option_flag(options, 'a', "add", PARSE_OPT_EXCLUSIVE);
|
|
|
|
set_option_flag(options, 'd', "del", PARSE_OPT_EXCLUSIVE);
|
|
|
|
set_option_flag(options, 'l', "list", PARSE_OPT_EXCLUSIVE);
|
|
|
|
#ifdef HAVE_DWARF_SUPPORT
|
|
|
|
set_option_flag(options, 'L', "line", PARSE_OPT_EXCLUSIVE);
|
|
|
|
set_option_flag(options, 'V', "vars", PARSE_OPT_EXCLUSIVE);
|
|
|
|
#endif
|
2015-04-23 15:46:12 +02:00
|
|
|
set_option_flag(options, 'F', "funcs", PARSE_OPT_EXCLUSIVE);
|
2014-10-22 17:15:49 +02:00
|
|
|
|
2009-10-08 23:17:38 +02:00
|
|
|
argc = parse_options(argc, argv, options, probe_usage,
|
2009-10-27 21:43:02 +01:00
|
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
2009-12-15 16:31:28 +01:00
|
|
|
if (argc > 0) {
|
|
|
|
if (strcmp(argv[0], "-") == 0) {
|
|
|
|
pr_warning(" Error: '-' is not supported.\n");
|
|
|
|
usage_with_options(probe_usage, options);
|
|
|
|
}
|
2015-05-05 17:22:57 +02:00
|
|
|
if (params.command && params.command != 'a') {
|
|
|
|
pr_warning(" Error: another command except --add is set.\n");
|
|
|
|
usage_with_options(probe_usage, options);
|
|
|
|
}
|
2010-04-12 19:17:42 +02:00
|
|
|
ret = parse_probe_event_argv(argc, argv);
|
|
|
|
if (ret < 0) {
|
2014-06-06 09:13:52 +02:00
|
|
|
pr_err_with_code(" Error: Command Parse Error.", ret);
|
2010-04-12 19:17:42 +02:00
|
|
|
return ret;
|
|
|
|
}
|
2015-05-05 17:22:57 +02:00
|
|
|
params.command = 'a';
|
2009-12-15 16:31:28 +01:00
|
|
|
}
|
2009-10-27 21:43:02 +01:00
|
|
|
|
2014-10-27 21:31:31 +01:00
|
|
|
if (params.quiet) {
|
|
|
|
if (verbose != 0) {
|
|
|
|
pr_err(" Error: -v and -q are exclusive.\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
verbose = -1;
|
|
|
|
}
|
|
|
|
|
2015-05-08 03:03:31 +02:00
|
|
|
if (probe_conf.max_probes == 0)
|
|
|
|
probe_conf.max_probes = MAX_PROBES;
|
2010-04-21 21:56:40 +02:00
|
|
|
|
2010-12-10 14:06:03 +01:00
|
|
|
/*
|
|
|
|
* Only consider the user's kernel image path if given.
|
|
|
|
*/
|
|
|
|
symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
|
|
|
|
|
2015-05-05 17:22:57 +02:00
|
|
|
switch (params.command) {
|
|
|
|
case 'l':
|
2012-04-16 14:09:09 +02:00
|
|
|
if (params.uprobes) {
|
|
|
|
pr_warning(" Error: Don't use --list with --exec.\n");
|
|
|
|
usage_with_options(probe_usage, options);
|
|
|
|
}
|
2015-04-24 11:47:50 +02:00
|
|
|
ret = show_perf_probe_events(params.filter);
|
2010-04-12 19:17:42 +02:00
|
|
|
if (ret < 0)
|
2014-06-06 09:13:52 +02:00
|
|
|
pr_err_with_code(" Error: Failed to show event list.", ret);
|
2010-04-12 19:17:42 +02:00
|
|
|
return ret;
|
2015-05-05 17:22:57 +02:00
|
|
|
case 'F':
|
2012-04-16 14:09:09 +02:00
|
|
|
ret = show_available_funcs(params.target, params.filter,
|
|
|
|
params.uprobes);
|
2011-01-13 13:46:11 +01:00
|
|
|
if (ret < 0)
|
2014-06-06 09:13:52 +02:00
|
|
|
pr_err_with_code(" Error: Failed to show functions.", ret);
|
2011-01-13 13:46:11 +01:00
|
|
|
return ret;
|
2013-09-30 12:07:11 +02:00
|
|
|
#ifdef HAVE_DWARF_SUPPORT
|
2015-05-05 17:22:57 +02:00
|
|
|
case 'L':
|
2014-09-17 10:40:54 +02:00
|
|
|
ret = show_line_range(¶ms.line_range, params.target,
|
|
|
|
params.uprobes);
|
2010-04-12 19:17:42 +02:00
|
|
|
if (ret < 0)
|
2014-06-06 09:13:52 +02:00
|
|
|
pr_err_with_code(" Error: Failed to show lines.", ret);
|
2010-04-12 19:17:42 +02:00
|
|
|
return ret;
|
2015-05-05 17:22:57 +02:00
|
|
|
case 'V':
|
2011-01-20 15:15:39 +01:00
|
|
|
if (!params.filter)
|
|
|
|
params.filter = strfilter__new(DEFAULT_VAR_FILTER,
|
|
|
|
NULL);
|
|
|
|
|
2010-10-21 12:13:23 +02:00
|
|
|
ret = show_available_vars(params.events, params.nevents,
|
2015-05-08 03:03:31 +02:00
|
|
|
params.filter);
|
2010-10-21 12:13:23 +02:00
|
|
|
if (ret < 0)
|
2014-06-06 09:13:52 +02:00
|
|
|
pr_err_with_code(" Error: Failed to show vars.", ret);
|
2010-10-21 12:13:23 +02:00
|
|
|
return ret;
|
2010-01-06 15:45:34 +01:00
|
|
|
#endif
|
2015-05-05 17:22:57 +02:00
|
|
|
case 'd':
|
2015-05-05 04:29:48 +02:00
|
|
|
ret = del_perf_probe_events(params.filter);
|
2010-04-12 19:17:42 +02:00
|
|
|
if (ret < 0) {
|
2014-06-06 09:13:52 +02:00
|
|
|
pr_err_with_code(" Error: Failed to delete events.", ret);
|
2010-04-12 19:17:42 +02:00
|
|
|
return ret;
|
|
|
|
}
|
2015-05-05 17:22:57 +02:00
|
|
|
break;
|
|
|
|
case 'a':
|
2015-04-01 12:25:42 +02:00
|
|
|
/* Ensure the last given target is used */
|
|
|
|
if (params.target && !params.target_used) {
|
|
|
|
pr_warning(" Error: -x/-m must follow the probe definitions.\n");
|
|
|
|
usage_with_options(probe_usage, options);
|
|
|
|
}
|
|
|
|
|
2015-05-08 03:03:31 +02:00
|
|
|
ret = add_perf_probe_events(params.events, params.nevents);
|
2010-04-12 19:17:42 +02:00
|
|
|
if (ret < 0) {
|
2014-06-06 09:13:52 +02:00
|
|
|
pr_err_with_code(" Error: Failed to add events.", ret);
|
2010-04-12 19:17:42 +02:00
|
|
|
return ret;
|
|
|
|
}
|
2015-05-05 17:22:57 +02:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
usage_with_options(probe_usage, options);
|
2010-04-12 19:17:42 +02:00
|
|
|
}
|
2009-10-08 23:17:38 +02:00
|
|
|
return 0;
|
|
|
|
}
|
2014-01-16 10:39:47 +01:00
|
|
|
|
|
|
|
int cmd_probe(int argc, const char **argv, const char *prefix)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
2014-02-06 06:32:09 +01:00
|
|
|
ret = init_params();
|
|
|
|
if (!ret) {
|
|
|
|
ret = __cmd_probe(argc, argv, prefix);
|
|
|
|
cleanup_params();
|
|
|
|
}
|
2014-01-16 10:39:47 +01:00
|
|
|
|
2015-05-06 14:46:45 +02:00
|
|
|
return ret < 0 ? ret : 0;
|
2014-01-16 10:39:47 +01:00
|
|
|
}
|