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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@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/20150505022950.23399.22435.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Masami Hiramatsu 2015-05-05 11:29:50 +09:00 committed by Arnaldo Carvalho de Melo
parent 307a464b23
commit 9f7811d08d
2 changed files with 16 additions and 6 deletions
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3
tools/perf/Documentation/perf-probe.txt
View File

@ -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

19
tools/perf/builtin-probe.c
View File

@ -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);