If --show-mmap option is given, also print internal MMAP and MMAP2 events. It would be helpful for debugging.
Suggested-by: Frederic Weisbecker <[email protected]> Signed-off-by: Namhyung Kim <[email protected]> --- tools/perf/Documentation/perf-script.txt | 3 ++ tools/perf/builtin-script.c | 78 ++++++++++++++++++++++++++++++++ 2 files changed, 81 insertions(+) diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt index 9a9a7c3d592d..ad67f3b0efda 100644 --- a/tools/perf/Documentation/perf-script.txt +++ b/tools/perf/Documentation/perf-script.txt @@ -206,6 +206,9 @@ OPTIONS --show-task Display task related events (e.g. FORK, COMM, EXIT). +--show-mmap + Display mmap related events (e.g. MMAP, MMAP2). + SEE ALSO -------- linkperf:perf-record[1], linkperf:perf-script-perl[1], diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index bc4cbb8b8867..4b88bdb936b4 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -549,6 +549,7 @@ struct perf_script { struct perf_tool tool; struct perf_session *session; bool show_task_events; + bool show_mmap_events; }; static int process_attr(struct perf_tool *tool, union perf_event *event, @@ -679,6 +680,77 @@ static int process_exit_event(struct perf_tool *tool, return 0; } +static int process_mmap_event(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct machine *machine) +{ + struct thread *thread; + struct perf_script *script = container_of(tool, struct perf_script, tool); + struct perf_session *session = script->session; + struct perf_evsel *evsel = perf_evlist__first(session->evlist); + + if (perf_event__process_mmap(tool, event, sample, machine) < 0) + return -1; + + thread = machine__findnew_thread(machine, event->mmap.pid, event->mmap.tid); + if (thread == NULL) { + pr_debug("problem processing MMAP event, skipping it.\n"); + return -1; + } + + if (!evsel->attr.sample_id_all) { + sample->cpu = 0; + sample->time = 0; + sample->tid = event->comm.tid; + sample->pid = event->comm.pid; + } + print_sample_start(sample, thread, evsel); + printf("mmap: [(%#"PRIx64" - %#"PRIx64") @ %#"PRIx64" ]: %c %s\n", + event->mmap.start, event->mmap.start + event->mmap.len, + event->mmap.pgoff, + (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x', + event->mmap.filename); + + return 0; +} + +static int process_mmap2_event(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct machine *machine) +{ + struct thread *thread; + struct perf_script *script = container_of(tool, struct perf_script, tool); + struct perf_session *session = script->session; + struct perf_evsel *evsel = perf_evlist__first(session->evlist); + + if (perf_event__process_mmap2(tool, event, sample, machine) < 0) + return -1; + + thread = machine__findnew_thread(machine, event->mmap2.pid, event->mmap2.tid); + if (thread == NULL) { + pr_debug("problem processing MMAP2 event, skipping it.\n"); + return -1; + } + + if (!evsel->attr.sample_id_all) { + sample->cpu = 0; + sample->time = 0; + sample->tid = event->mmap2.tid; + sample->pid = event->mmap2.pid; + } + print_sample_start(sample, thread, evsel); + printf("mmap: [(%#"PRIx64" - %#"PRIx64") @ %#"PRIx64" %02x:%02x %"PRIu64"]: %c %s\n", + event->mmap2.start, event->mmap2.start + event->mmap2.len, + event->mmap2.pgoff, event->mmap2.maj, event->mmap2.min, + event->mmap2.ino, + (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x', + event->mmap2.filename); + + return 0; +} + static void sig_handler(int sig __maybe_unused) { session_done = 1; @@ -696,6 +768,10 @@ static int __cmd_script(struct perf_script *script) script->tool.fork = process_fork_event; script->tool.exit = process_exit_event; } + if (script->show_mmap_events) { + script->tool.mmap = process_mmap_event; + script->tool.mmap2 = process_mmap2_event; + } ret = perf_session__process_events(script->session, &script->tool); @@ -1461,6 +1537,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused) "Show the path of [kernel.kallsyms]"), OPT_BOOLEAN('\0', "show-task", &script.show_task_events, "Show the fork/comm/exit events"), + OPT_BOOLEAN('\0', "show-mmap", &script.show_mmap_events, + "Show the mmap events"), OPT_END() }; const char * const script_usage[] = { -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
