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>

1 files changed, 69 insertions, 0 deletions

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index e2b9aff6506e..952dce979252 100644
--- 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[] = {