[PATCH 14/47] perf tools: Add thread_map__new_event function

Jiri Olsa
2015-07-21T12:32:39Z

Introducing thread_map__new_event function to create
struct thread_map object from thread_map event.

Link: http://lkml.kernel.org/n/tip-0gu5uv3g51p4mzul93bhh2yh@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/tests/thread-map.c | 14 ++++++++++++++
tools/perf/util/thread_map.c | 27 +++++++++++++++++++++++++++
tools/perf/util/thread_map.h | 3 +++
3 files changed, 44 insertions(+)

diff --git a/tools/perf/tests/thread-map.c b/tools/perf/tests/thread-map.c
index 0facd9fa3458..da7b047d3ada 100644
--- a/tools/perf/tests/thread-map.c
+++ b/tools/perf/tests/thread-map.c
@@ -47,10 +47,24 @@ static int process_event(struct perf_tool *tool __maybe_unused,
struct machine *machine __maybe_unused)
{
struct thread_map_event *map = &event->thread_map;
+ struct thread_map *threads;

TEST_ASSERT_VAL("wrong nr", map->nr == 1);
TEST_ASSERT_VAL("wrong pid", map->data[0].pid == (u64) getpid());
TEST_ASSERT_VAL("wrong comm", !strcmp(map->data[0].comm, "perf"));
+
+ threads = thread_map__new_event(&event->thread_map);
+ TEST_ASSERT_VAL("failed to alloc map", threads);
+
+ TEST_ASSERT_VAL("wrong nr", threads->nr == 1);
+ TEST_ASSERT_VAL("wrong pid",
+ thread_map__pid(threads, 0) == getpid());
+ TEST_ASSERT_VAL("wrong comm",
+ thread_map__comm(threads, 0) &&
+ !strcmp(thread_map__comm(threads, 0), "perf"));
+ TEST_ASSERT_VAL("wrong refcnt",
+ atomic_read(&threads->refcnt) == 1);
+ thread_map__put(threads);
return 0;
}

diff --git a/tools/perf/util/thread_map.c b/tools/perf/util/thread_map.c
index da7646d767fe..34d44df2fb1e 100644
--- a/tools/perf/util/thread_map.c
+++ b/tools/perf/util/thread_map.c
@@ -13,6 +13,7 @@
#include "thread_map.h"
#include "util.h"
#include "debug.h"
+#include "event.h"

/* Skip "." and ".." directories */
static int filter(const struct dirent *dir)
@@ -407,3 +408,29 @@ void thread_map__read_comms(struct thread_map *threads)
for (i = 0; i < threads->nr; ++i)
comm_init(threads, i);
}
+
+static void thread_map__copy_event(struct thread_map *threads,
+ struct thread_map_event *event)
+{
+ unsigned i;
+
+ threads->nr = (int) event->nr;
+
+ for (i = 0; i < event->nr; i++) {
+ thread_map__set_pid(threads, i, (pid_t) event->data[i].pid);
+ threads->map[i].comm = strndup(event->data[i].comm, 16);
+ }
+
+ atomic_set(&threads->refcnt, 1);
+}
+
+struct thread_map *thread_map__new_event(struct thread_map_event *event)
+{
+ struct thread_map *threads;
+
+ threads = thread_map__alloc(event->nr);
+ if (threads)
+ thread_map__copy_event(threads, event);
+
+ return threads;
+}
diff --git a/tools/perf/util/thread_map.h b/tools/perf/util/thread_map.h
index af679d8a50f8..85e4c7c4fbde 100644
--- a/tools/perf/util/thread_map.h
+++ b/tools/perf/util/thread_map.h
@@ -16,11 +16,14 @@ struct thread_map {
struct thread_map_data map[];
};

+struct thread_map_event;
+
struct thread_map *thread_map__new_dummy(void);
struct thread_map *thread_map__new_by_pid(pid_t pid);
struct thread_map *thread_map__new_by_tid(pid_t tid);
struct thread_map *thread_map__new_by_uid(uid_t uid);
struct thread_map *thread_map__new(pid_t pid, pid_t tid, uid_t uid);
+struct thread_map *thread_map__new_event(struct thread_map_event *event);

struct thread_map *thread_map__get(struct thread_map *map);
void thread_map__put(struct thread_map *map);
--
2.4.3