perf probe: Add --list option for listing current probe events
Add --list option for listing currently defined probe events
in the kernel. This shows events in below format;
[group:event] <perf-probe probe-definition>
for example:
[probe:schedule_0] schedule+30 cpu
Note that source file/line information is not supported yet.
So even if you added a probe by line, it will be shown in
<symbol+offset>.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20091201002017.10235.76575.stgit@harusame>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index bf20df2..b5d15cf 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -62,6 +62,8 @@
struct probe_point probes[MAX_PROBES];
} session;
+static bool listing;
+
/* Parse an event definition. Note that any error must die. */
static void parse_probe_event(const char *str)
{
@@ -119,6 +121,7 @@
static const char * const probe_usage[] = {
"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
+ "perf probe --list",
NULL
};
@@ -129,6 +132,7 @@
OPT_STRING('k', "vmlinux", &session.vmlinux, "file",
"vmlinux/module pathname"),
#endif
+ OPT_BOOLEAN('l', "list", &listing, "list up current probes"),
OPT_CALLBACK('a', "add", NULL,
#ifdef NO_LIBDWARF
"FUNC[+OFFS|%return] [ARG ...]",
@@ -164,9 +168,15 @@
for (i = 0; i < argc; i++)
parse_probe_event(argv[i]);
- if (session.nr_probe == 0)
+ if ((session.nr_probe == 0 && !listing) ||
+ (session.nr_probe != 0 && listing))
usage_with_options(probe_usage, options);
+ if (listing) {
+ show_perf_probe_events();
+ return 0;
+ }
+
if (session.need_dwarf)
#ifdef NO_LIBDWARF
die("Debuginfo-analysis is not supported");