From a4455e0053aacf4ae088530dc045d50f4ea471e3 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Fri, 20 May 2022 16:24:03 +0300 Subject: [PATCH] perf data: Add has_kcore_dir() Add a helper function has_kcore_dir(), so that perf inject can determine if it needs to keep the kcore_dir. Signed-off-by: Adrian Hunter Acked-by: Jiri Olsa Cc: Namhyung Kim Link: https://lore.kernel.org/r/20220520132404.25853-5-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/data.c | 14 ++++++++++++++ tools/perf/util/data.h | 1 + 2 files changed, 15 insertions(+) diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index a5ace2bb..caabeac 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -479,6 +479,20 @@ int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz) return mkdir(buf, S_IRWXU); } +bool has_kcore_dir(const char *path) +{ + char *kcore_dir; + int ret; + + if (asprintf(&kcore_dir, "%s/kcore_dir", path) < 0) + return false; + + ret = access(kcore_dir, F_OK); + + free(kcore_dir); + return !ret; +} + char *perf_data__kallsyms_name(struct perf_data *data) { char *kallsyms_name; diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h index 1402d96..7de53d6e 100644 --- a/tools/perf/util/data.h +++ b/tools/perf/util/data.h @@ -99,6 +99,7 @@ void perf_data__close_dir(struct perf_data *data); int perf_data__update_dir(struct perf_data *data); unsigned long perf_data__size(struct perf_data *data); int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz); +bool has_kcore_dir(const char *path); char *perf_data__kallsyms_name(struct perf_data *data); bool is_perf_data(const char *path); #endif /* __PERF_DATA_H */ -- 2.7.4