[PATCH] perf tool: add skip_not_exec_file_map_events option

[tcwzxx <tcwzxx@gmail.com>]

When generate the flame graph, the perf-script subcommand will
process all mmap event and add them to the rbtree. The 240,000
mmap region takes about 5 minutes, which is not useful for flame
graph. So add the skip-not-exec-file-map-events option to skip
not PROT_EXEC flag memory regions.

Signed-off-by: tcwzxx <tcwzxx@gmail.com>
---
 tools/perf/builtin-report.c | 2 ++
 tools/perf/builtin-script.c | 3 +++
 tools/perf/util/machine.c   | 3 +++
 tools/perf/util/map.c       | 5 +++++
 tools/perf/util/map.h       | 2 ++
 5 files changed, 15 insertions(+)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 91ed41cc7d88..c28eb9450a66 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1364,6 +1364,8 @@ int cmd_report(int argc, const char **argv)
 		    "Disable raw trace ordering"),
 	OPT_BOOLEAN(0, "skip-empty", &report.skip_empty,
 		    "Do not display empty (or dummy) events in the output"),
+	OPT_BOOLEAN(0, "skip-not-exec-file-map_events", &skip_not_exec_file_map_events,
+		    "skip not exec map events"),
 	OPT_END()
 	};
 	struct perf_data data = {
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 13580a9c50b8..e3f4e5e654c9 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -32,6 +32,7 @@
 #include "util/time-utils.h"
 #include "util/path.h"
 #include "util/event.h"
+#include "util/map.h"
 #include "ui/ui.h"
 #include "print_binary.h"
 #include "archinsn.h"
@@ -3936,6 +3937,8 @@ int cmd_script(int argc, const char **argv)
 		    "Guest code can be found in hypervisor process"),
 	OPT_BOOLEAN('\0', "stitch-lbr", &script.stitch_lbr,
 		    "Enable LBR callgraph stitching approach"),
+	OPT_BOOLEAN(0, "skip-not-exec-map_events", &skip_not_exec_file_map_events,
+		    "skip not exec map events"),
 	OPTS_EVSWITCH(&script.evswitch),
 	OPT_END()
 	};
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 2a16cae28407..21dde9f9935c 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1904,6 +1904,9 @@ int machine__process_mmap2_event(struct machine *machine,
 	if (thread == NULL)
 		goto out_problem;
 
+	if (skip_not_exec_file_map_events && !(event->mmap2.prot & PROT_EXEC))
+		goto out_problem;
+
 	map = map__new(machine, event->mmap2.start,
 			event->mmap2.len, event->mmap2.pgoff,
 			&dso_id, event->mmap2.prot,
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index e0aa4a254583..2b51ca012c91 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -16,6 +16,8 @@
 #include "thread.h"
 #include "vdso.h"
 
+bool skip_not_exec_file_map_events;
+
 static inline int is_android_lib(const char *filename)
 {
 	return strstarts(filename, "/data/app-lib/") ||
@@ -168,6 +170,9 @@ struct map *map__new(struct machine *machine, u64 start, u64 len,
 		if (dso == NULL)
 			goto out_delete;
 
+		if (skip_not_exec_file_map_events && dso__type(dso, machine) == DSO__TYPE_UNKNOWN)
+			goto out_delete;
+
 		map__init(map, start, start + len, pgoff, dso);
 
 		if (anon || no_dso) {
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index 3dcfe06db6b3..67b0e0f9f0ae 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -11,6 +11,8 @@
 #include <stdbool.h>
 #include <linux/types.h>
 
+extern bool skip_not_exec_file_map_events;
+
 struct dso;
 struct maps;
 struct machine;
-- 
2.34.1