From 1c20b1d15473a91e2fccecbcd2809d80ff4b4924 Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Fri, 26 Aug 2016 01:24:27 +0900 Subject: perf probe: Show trace event definition Add --definition/-D option for showing the trace-event definition in stdout. This can be useful in debugging or combined with a shell script. e.g. ---- # perf probe --definition 'do_sys_open $params' p:probe/do_sys_open _text+2261728 dfd=%di:s32 filename=%si:u64 flags=%dx:s32 mode=%cx:u16 ---- Suggested-and-Tested-by: Arnaldo Carvalho de Melo Signed-off-by: Masami Hiramatsu Cc: Ingo Molnar Cc: Jiri Olsa Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/147214226712.23638.2240534040014013658.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/probe-event.c | 46 +++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/probe-event.h | 1 + 2 files changed, 47 insertions(+) (limited to 'tools/perf/util') diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index 0bed2ee..4a49cb8 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -3207,6 +3207,52 @@ int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs) return 0; } +static int show_probe_trace_event(struct probe_trace_event *tev) +{ + char *buf = synthesize_probe_trace_command(tev); + + if (!buf) { + pr_debug("Failed to synthesize probe trace event.\n"); + return -EINVAL; + } + + /* Showing definition always go stdout */ + printf("%s\n", buf); + free(buf); + + return 0; +} + +int show_probe_trace_events(struct perf_probe_event *pevs, int npevs) +{ + struct strlist *namelist = strlist__new(NULL, NULL); + struct probe_trace_event *tev; + struct perf_probe_event *pev; + int i, j, ret = 0; + + if (!namelist) + return -ENOMEM; + + for (j = 0; j < npevs && !ret; j++) { + pev = &pevs[j]; + for (i = 0; i < pev->ntevs && !ret; i++) { + tev = &pev->tevs[i]; + /* Skip if the symbol is out of .text or blacklisted */ + if (!tev->point.symbol && !pev->uprobes) + continue; + + /* Set new name for tev (and update namelist) */ + ret = probe_trace_event__set_name(tev, pev, + namelist, true); + if (!ret) + ret = show_probe_trace_event(tev); + } + } + strlist__delete(namelist); + + return ret; +} + int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs) { int i, ret = 0; diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h index f4f45db..6209408 100644 --- a/tools/perf/util/probe-event.h +++ b/tools/perf/util/probe-event.h @@ -147,6 +147,7 @@ int line_range__init(struct line_range *lr); int add_perf_probe_events(struct perf_probe_event *pevs, int npevs); int convert_perf_probe_events(struct perf_probe_event *pevs, int npevs); int apply_perf_probe_events(struct perf_probe_event *pevs, int npevs); +int show_probe_trace_events(struct perf_probe_event *pevs, int npevs); void cleanup_perf_probe_events(struct perf_probe_event *pevs, int npevs); int del_perf_probe_events(struct strfilter *filter); -- cgit v1.1