perf script: Print mmap[2] events also

If --show-mmap-events option is given, also print internal MMAP and
MMAP2 events.  It would be helpful for debugging.

  $ perf script --show-mmap-events
  ...
           sleep  9486 [009] 3350640.335531: PERF_RECORD_MMAP 9486/9486: [0x400000(0x6000) @ 0]: x /usr/bin/sleep
           sleep  9486 [009] 3350640.335542: PERF_RECORD_MMAP 9486/9486: [0x3153a00000(0x223000) @ 0]: x /usr/lib64/ld-2.17.so
           sleep  9486 [009] 3350640.335553: PERF_RECORD_MMAP 9486/9486: [0x7fff8b5fe000(0x2000) @ 0x7fff8b5fe000]: x [vdso]
           sleep  9486 [009] 3350640.335643: PERF_RECORD_MMAP 9486/9486: [0x3153e00000(0x3c0000) @ 0]: x /usr/lib64/libc-2.17.so

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Suggested-by: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1385456066-26592-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 67af9b77ea780562a58e4964ea73bd028f557ad0..cfdbb1e045b53514f919e6c96acb48d0b6df4be3 100644 (file)
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -206,6 +206,9 @@ OPTIONS
 --show-task-events
        Display task related events (e.g. FORK, COMM, EXIT).
 
+--show-mmap-events
+       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 e2b9aff6506ec232d532f02edb47b315caef5802..952dce979252f5e9d71f8093d0b71f4367c0a1f5 100644 (file)
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -573,6 +573,7 @@ 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,
@@ -698,6 +699,68 @@ 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->mmap.tid;
+               sample->pid = event->mmap.pid;
+       }
+       print_sample_start(sample, thread, evsel);
+       perf_event__fprintf(event, stdout);
+
+       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);
+       perf_event__fprintf(event, stdout);
+
+       return 0;
+}
+
 static void sig_handler(int sig __maybe_unused)
 {
        session_done = 1;
@@ -715,6 +778,10 @@ 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);
 
@@ -1480,6 +1547,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
                    "Show the path of [kernel.kallsyms]"),
        OPT_BOOLEAN('\0', "show-task-events", &script.show_task_events,
                    "Show the fork/comm/exit events"),
+       OPT_BOOLEAN('\0', "show-mmap-events", &script.show_mmap_events,
+                   "Show the mmap events"),
        OPT_END()
        };
        const char * const script_usage[] = {