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Date: Fri, 1 Dec 2017 18:57:34 +0800 From: Jin Yao <yao.jin@...ux.intel.com> To: acme@...nel.org, jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com, alexander.shishkin@...ux.intel.com Cc: Linux-kernel@...r.kernel.org, ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com, Jin Yao <yao.jin@...ux.intel.com> Subject: [PATCH v5 10/12] perf util: Reuse thread_map__new_by_uid to enumerate threads from /proc Perf already has a function thread_map__new_by_uid() which can enumerate all threads from /proc by uid. This patch creates a static function enumerate_threads() which reuses the common code in thread_map__new_by_uid() to enumerate threads from /proc. The enumerate_threads() is shared by thread_map__new_by_uid() and a new function thread_map__new_threads(). The new function thread_map__new_threads() is called to enumerate all threads from /proc. Signed-off-by: Jin Yao <yao.jin@...ux.intel.com> --- tools/perf/tests/thread-map.c | 2 +- tools/perf/util/evlist.c | 3 ++- tools/perf/util/thread_map.c | 19 ++++++++++++++++--- tools/perf/util/thread_map.h | 3 ++- 4 files changed, 21 insertions(+), 6 deletions(-) diff --git a/tools/perf/tests/thread-map.c b/tools/perf/tests/thread-map.c index dbcb6a1..4de1939 100644 --- a/tools/perf/tests/thread-map.c +++ b/tools/perf/tests/thread-map.c @@ -105,7 +105,7 @@ int test__thread_map_remove(struct test *test __maybe_unused, int subtest __mayb TEST_ASSERT_VAL("failed to allocate map string", asprintf(&str, "%d,%d", getpid(), getppid()) >= 0); - threads = thread_map__new_str(str, NULL, 0); + threads = thread_map__new_str(str, NULL, 0, false); TEST_ASSERT_VAL("failed to allocate thread_map", threads); diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 199bb82..05b8f2b 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -1102,7 +1102,8 @@ int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) struct cpu_map *cpus; struct thread_map *threads; - threads = thread_map__new_str(target->pid, target->tid, target->uid); + threads = thread_map__new_str(target->pid, target->tid, target->uid, + target->per_thread); if (!threads) return -1; diff --git a/tools/perf/util/thread_map.c b/tools/perf/util/thread_map.c index be0d5a7..5672268 100644 --- a/tools/perf/util/thread_map.c +++ b/tools/perf/util/thread_map.c @@ -92,7 +92,7 @@ struct thread_map *thread_map__new_by_tid(pid_t tid) return threads; } -struct thread_map *thread_map__new_by_uid(uid_t uid) +static struct thread_map *enumerate_threads(uid_t uid) { DIR *proc; int max_threads = 32, items, i; @@ -124,7 +124,7 @@ struct thread_map *thread_map__new_by_uid(uid_t uid) if (stat(path, &st) != 0) continue; - if (st.st_uid != uid) + if ((uid != UINT_MAX) && (st.st_uid != uid)) continue; snprintf(path, sizeof(path), "/proc/%d/task", pid); @@ -178,6 +178,16 @@ struct thread_map *thread_map__new_by_uid(uid_t uid) goto out_closedir; } +struct thread_map *thread_map__new_by_uid(uid_t uid) +{ + return enumerate_threads(uid); +} + +struct thread_map *thread_map__new_threads(void) +{ + return enumerate_threads(UINT_MAX); +} + struct thread_map *thread_map__new(pid_t pid, pid_t tid, uid_t uid) { if (pid != -1) @@ -313,7 +323,7 @@ struct thread_map *thread_map__new_by_tid_str(const char *tid_str) } struct thread_map *thread_map__new_str(const char *pid, const char *tid, - uid_t uid) + uid_t uid, bool per_thread) { if (pid) return thread_map__new_by_pid_str(pid); @@ -321,6 +331,9 @@ struct thread_map *thread_map__new_str(const char *pid, const char *tid, if (!tid && uid != UINT_MAX) return thread_map__new_by_uid(uid); + if (per_thread) + return thread_map__new_threads(); + return thread_map__new_by_tid_str(tid); } diff --git a/tools/perf/util/thread_map.h b/tools/perf/util/thread_map.h index f158039..dc07543 100644 --- a/tools/perf/util/thread_map.h +++ b/tools/perf/util/thread_map.h @@ -23,6 +23,7 @@ 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_threads(void); 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); @@ -30,7 +31,7 @@ struct thread_map *thread_map__get(struct thread_map *map); void thread_map__put(struct thread_map *map); struct thread_map *thread_map__new_str(const char *pid, - const char *tid, uid_t uid); + const char *tid, uid_t uid, bool per_thread); struct thread_map *thread_map__new_by_tid_str(const char *tid_str); -- 2.7.4
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