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perf thread_map: Add thread_map__new_event function

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

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Kan Liang <kan.liang@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-6-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2015-10-25 15:51:21 +01:00 committed by Arnaldo Carvalho de Melo
parent 99471c967a
commit 5966094239
3 changed files with 44 additions and 0 deletions
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14
tools/perf/tests/thread-map.c
View File

@ -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->entries[0].pid == (u64) getpid());
TEST_ASSERT_VAL("wrong comm", !strcmp(map->entries[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;
}

27
tools/perf/util/thread_map.c
View File

@ -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)
@ -409,3 +410,29 @@ 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->entries[i].pid);
threads->map[i].comm = strndup(event->entries[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;
}

3
tools/perf/util/thread_map.h
View File

@ -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);