If --show-mmap option is given, also print internal MMAP and MMAP2
events. It would be helpful for debugging.
$ perf script --show-mmap
...
sleep 9486 [009] 3350640.335531: mmap: [(0x400000 - 0x406000) @ 0
]: x /usr/bin/sleep
sleep 9486 [009] 3350640.335542: mmap: [(0x3153a00000 -
0x3153c23000) @ 0 ]: x /usr/lib64/ld-2.17.so
sleep 9486 [009] 3350640.335553: mmap: [(0x7fff8b5fe000 -
0x7fff8b600000) @ 0x7fff8b5fe000 ]: x [vdso]
sleep 9486 [009] 3350640.335643: mmap: [(0x3153e00000 -
0x31541c0000) @ 0 ]: x /usr/lib64/libc-2.17.so
Suggested-by: Frederic Weisbecker <fweis...@gmail.com>
Reviewed-by: David Ahern <dsah...@gmail.com>
Signed-off-by: Namhyung Kim <namhy...@kernel.org>
---
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 d05e6d835877..03bf978a47ce 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,
@@ -684,6 +685,77 @@ 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;
@@ -701,6 +773,10 @@ 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);
@@ -1466,6 +1542,8 @@ 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
--
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