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perf probe: Accept filter argument for --list

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Currently, perf-probe --list option ignores given event filter.
  ----
  # ./perf probe -l vfs\*
    probe:vfs_read       (on vfs_read@ksrc/linux-3/fs/read_write.c)
    probe_libc:malloc    (on __libc_malloc@malloc/malloc.c in /usr/lib64/libc-2.17.so)
  ----

This changes --list option to accept the event filter argument as below.
  ----
  # ./perf probe -l vfs\*
    probe:vfs_read       (on vfs_read@ksrc/linux-3/fs/read_write.c)
  # ./perf probe -l \*libc:\*
    probe_libc:malloc    (on __libc_malloc@malloc/malloc.c in /usr/lib64/libc-2.17.so)
  ----

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20150424094750.23967.53868.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu 2015-04-24 18:47:50 +09:00 committed by Arnaldo Carvalho de Melo
parent 96b55e3923
commit b6a896438b
4 changed files with 73 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/perf/Documentation/perf-probe.txt
View File

@ -14,7 +14,7 @@ or
or
'perf probe' [options] --del='[GROUP:]EVENT' [...]
or
'perf probe' --list
'perf probe' --list[=[GROUP:]EVENT]
or
'perf probe' [options] --line='LINE'
or
@ -66,8 +66,8 @@ OPTIONS
classes(e.g. [a-z], [!A-Z]).
-l::
--list::
List up current probe events.
--list[=[GROUP:]EVENT]::
List up current probe events. This can also accept filtering patterns of event names.
-L::
--line=::

70
tools/perf/builtin-probe.c
View File

@ -44,6 +44,7 @@
#define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
#define DEFAULT_FUNC_FILTER "!_*"
#define DEFAULT_LIST_FILTER "*:*"
/* Session management structure */
static struct {
@ -93,6 +94,28 @@ static int parse_probe_event(const char *str)
return ret;
}
static int params_add_filter(const char *str)
{
const char *err = NULL;
int ret = 0;
pr_debug2("Add filter: %s\n", str);
if (!params.filter) {
params.filter = strfilter__new(str, &err);
if (!params.filter)
ret = err ? -EINVAL : -ENOMEM;
} else
ret = strfilter__or(params.filter, str, &err);
if (ret == -EINVAL) {
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 ret;
}
static int set_target(const char *ptr)
{
int found = 0;
@ -180,6 +203,18 @@ static int opt_del_probe_event(const struct option *opt __maybe_unused,
return 0;
}
static int opt_list_probe_event(const struct option *opt __maybe_unused,
const char *str, int unset)
{
if (!unset)
params.list_events = true;
if (str)
return params_add_filter(str);
return 0;
}
static int opt_set_target(const struct option *opt, const char *str,
int unset __maybe_unused)
{
@ -261,26 +296,10 @@ static int opt_show_vars(const struct option *opt __maybe_unused,
static int opt_set_filter(const struct option *opt __maybe_unused,
const char *str, int unset __maybe_unused)
{
const char *err;
int ret = 0;
if (str)
return params_add_filter(str);
if (str) {
pr_debug2("Set filter: %s\n", str);
if (!params.filter) {
params.filter = strfilter__new(str, &err);
if (!params.filter)
ret = err ? -EINVAL : -ENOMEM;
} else
ret = strfilter__or(params.filter, str, &err);
if (ret == -EINVAL) {
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 ret;
return 0;
}
static int init_params(void)
@ -320,21 +339,22 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
"perf probe [<options>] --del '[GROUP:]EVENT' ...",
"perf probe --list",
"perf probe --list [GROUP:]EVENT ...",
#ifdef HAVE_DWARF_SUPPORT
"perf probe [<options>] --line 'LINEDESC'",
"perf probe [<options>] --vars 'PROBEPOINT'",
#endif
"perf probe [<options>] --funcs",
NULL
};
};
struct option options[] = {
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show parsed arguments, etc)"),
OPT_BOOLEAN('q', "quiet", &params.quiet,
"be quiet (do not show any mesages)"),
OPT_BOOLEAN('l', "list", &params.list_events,
"list up current probe events"),
OPT_CALLBACK_DEFAULT('l', "list", NULL, "[GROUP:]EVENT",
"list up probe events", opt_list_probe_event,
DEFAULT_LIST_FILTER),
OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.",
opt_del_probe_event),
OPT_CALLBACK('a', "add", NULL,
@ -448,7 +468,9 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
pr_warning(" Error: Don't use --list with --exec.\n");
usage_with_options(probe_usage, options);
}
ret = show_perf_probe_events();
ret = show_perf_probe_events(params.filter);
strfilter__delete(params.filter);
params.filter = NULL;
if (ret < 0)
pr_err_with_code(" Error: Failed to show event list.", ret);
return ret;

27
tools/perf/util/probe-event.c
View File

@ -2146,7 +2146,23 @@ static int show_perf_probe_event(struct perf_probe_event *pev,
return ret;
}
static int __show_perf_probe_events(int fd, bool is_kprobe)
static bool filter_probe_trace_event(struct probe_trace_event *tev,
struct strfilter *filter)
{
char tmp[128];
/* At first, check the event name itself */
if (strfilter__compare(filter, tev->event))
return true;
/* Next, check the combination of name and group */
if (e_snprintf(tmp, 128, "%s:%s", tev->group, tev->event) < 0)
return false;
return strfilter__compare(filter, tmp);
}
static int __show_perf_probe_events(int fd, bool is_kprobe,
struct strfilter *filter)
{
int ret = 0;
struct probe_trace_event tev;
@ -2164,12 +2180,15 @@ static int __show_perf_probe_events(int fd, bool is_kprobe)
strlist__for_each(ent, rawlist) {
ret = parse_probe_trace_command(ent->s, &tev);
if (ret >= 0) {
if (!filter_probe_trace_event(&tev, filter))
goto next;
ret = convert_to_perf_probe_event(&tev, &pev,
is_kprobe);
if (ret >= 0)
ret = show_perf_probe_event(&pev,
tev.point.module);
}
next:
clear_perf_probe_event(&pev);
clear_probe_trace_event(&tev);
if (ret < 0)
@ -2181,7 +2200,7 @@ static int __show_perf_probe_events(int fd, bool is_kprobe)
}
/* List up current perf-probe events */
int show_perf_probe_events(void)
int show_perf_probe_events(struct strfilter *filter)
{
int kp_fd, up_fd, ret;
@ -2193,7 +2212,7 @@ int show_perf_probe_events(void)
kp_fd = open_kprobe_events(false);
if (kp_fd >= 0) {
ret = __show_perf_probe_events(kp_fd, true);
ret = __show_perf_probe_events(kp_fd, true, filter);
close(kp_fd);
if (ret < 0)
goto out;
@ -2207,7 +2226,7 @@ int show_perf_probe_events(void)
}
if (up_fd >= 0) {
ret = __show_perf_probe_events(up_fd, false);
ret = __show_perf_probe_events(up_fd, false, filter);
close(up_fd);
}
out:

2
tools/perf/util/probe-event.h
View File

@ -127,7 +127,7 @@ extern const char *kernel_get_module_path(const char *module);
extern int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
int max_probe_points, bool force_add);
extern int del_perf_probe_events(struct strlist *dellist);
extern int show_perf_probe_events(void);
extern int show_perf_probe_events(struct strfilter *filter);
extern int show_line_range(struct line_range *lr, const char *module,
bool user);
extern int show_available_vars(struct perf_probe_event *pevs, int npevs,