[tip:perf/core] perf probe: Accept filter argument for --funcs

From: tip-bot for Masami Hiramatsu
Date: Tue May 05 2015 - 23:19:57 EST


Commit-ID: 9f7811d08dcf7b3e900cbc0d8384b713a86b034f
Gitweb: http://git.kernel.org/tip/9f7811d08dcf7b3e900cbc0d8384b713a86b034f
Author: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
AuthorDate: Tue, 5 May 2015 11:29:50 +0900
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 5 May 2015 18:13:04 -0300

perf probe: Accept filter argument for --funcs

This allows the user to pass the filter pattern directly to the --funcs
option as below:

----
# ./perf probe -F *kmalloc
__kmalloc
devm_kmalloc
mempool_kmalloc
sg_kmalloc
sock_kmalloc
----

We previously needed to use the --filter option for that.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20150505022950.23399.22435.stgit@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/Documentation/perf-probe.txt | 3 ++-
tools/perf/builtin-probe.c | 19 ++++++++++++++-----
2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index d0feb8e..a272f2e 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -84,9 +84,10 @@ OPTIONS
variables.

-F::
---funcs::
+--funcs[=FILTER]::
Show available functions in given module or kernel. With -x/--exec,
can also list functions in a user space executable / shared library.
+ This also can accept a FILTER rule argument.

--filter=FILTER::
(Only for --vars and --funcs) Set filter. FILTER is a combination of glob
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 1f41b4e..5a0e8f1 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -290,6 +290,17 @@ static int opt_show_vars(const struct option *opt __maybe_unused,
return ret;
}
#endif
+static int opt_show_funcs(const struct option *opt __maybe_unused,
+ const char *str, int unset)
+{
+ if (!unset)
+ params.show_funcs = true;
+
+ if (str)
+ return params_add_filter(str);
+
+ return 0;
+}

static int opt_set_filter(const struct option *opt __maybe_unused,
const char *str, int unset __maybe_unused)
@@ -399,8 +410,9 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
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_DEFAULT('F', "funcs", NULL, "[FILTER]",
+ "Show potential probe-able functions.",
+ opt_show_funcs, DEFAULT_FUNC_FILTER),
OPT_CALLBACK('\0', "filter", NULL,
"[!]FILTER", "Set a filter (with --vars/funcs only)\n"
"\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"
@@ -472,9 +484,6 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
return ret;
}
if (params.show_funcs) {
- if (!params.filter)
- params.filter = strfilter__new(DEFAULT_FUNC_FILTER,
- NULL);
ret = show_available_funcs(params.target, params.filter,
params.uprobes);
strfilter__delete(params.filter);
--
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