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author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2015-04-01 12:25:39 +0200 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-04-10 15:19:53 +0200 |
commit | 7afb3fab390871b1d20b1dbb94e03b8a3861cb0d (patch) | |
tree | 4bfc7c1255b27510159a6af4f09e7ae7c23c4089 /tools/perf/builtin-probe.c | |
parent | perf buildid-list: Fix segfault when show DSOs with hits (diff) | |
download | linux-7afb3fab390871b1d20b1dbb94e03b8a3861cb0d.tar.xz linux-7afb3fab390871b1d20b1dbb94e03b8a3861cb0d.zip |
perf probe: Support multiple probes on different binaries
Support multiple probes on different binaries with just
one command.
In the result, this example sets up the probes on icmp_rcv in
kernel, on main and set_target in perf, and on pcspkr_event
in pcspker.ko driver.
-----
# perf probe -a icmp_rcv -x ./perf -a main -a set_target \
-m /lib/modules/4.0.0-rc5+/kernel/drivers/input/misc/pcspkr.ko \
-a pcspkr_event
Added new event:
probe:icmp_rcv (on icmp_rcv)
You can now use it in all perf tools, such as:
perf record -e probe:icmp_rcv -aR sleep 1
Added new event:
probe_perf:main (on main in /home/mhiramat/ksrc/linux-3/tools/perf/perf)
You can now use it in all perf tools, such as:
perf record -e probe_perf:main -aR sleep 1
Added new event:
probe_perf:set_target (on set_target in /home/mhiramat/ksrc/linux-3/tools/perf/perf)
You can now use it in all perf tools, such as:
perf record -e probe_perf:set_target -aR sleep 1
Added new event:
probe:pcspkr_event (on pcspkr_event in pcspkr)
You can now use it in all perf tools, such as:
perf record -e probe:pcspkr_event -aR sleep 1
-----
Reported-by: Arnaldo Carvalho de Melo <acme@infradead.org>
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/20150401102539.17137.46454.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-probe.c')
-rw-r--r-- | tools/perf/builtin-probe.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 921bb6942503..2df23e177da5 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -78,6 +78,11 @@ static int parse_probe_event(const char *str) } pev->uprobes = params.uprobes; + if (params.target) { + pev->target = strdup(params.target); + if (!pev->target) + return -ENOMEM; + } /* Parse a perf-probe command into event */ ret = parse_perf_probe_command(str, pev); @@ -178,7 +183,7 @@ static int opt_set_target(const struct option *opt, const char *str, int ret = -ENOENT; char *tmp; - if (str && !params.target) { + if (str) { if (!strcmp(opt->long_name, "exec")) params.uprobes = true; #ifdef HAVE_DWARF_SUPPORT @@ -200,6 +205,7 @@ static int opt_set_target(const struct option *opt, const char *str, if (!tmp) return -ENOMEM; } + free(params.target); params.target = tmp; ret = 0; } @@ -487,7 +493,6 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused) if (params.nevents) { ret = add_perf_probe_events(params.events, params.nevents, params.max_probe_points, - params.target, params.force_add); if (ret < 0) { pr_err_with_code(" Error: Failed to add events.", ret); |