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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 <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20220520132404.25853-5-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2022-05-20 16:24:03 +03:00 committed by Arnaldo Carvalho de Melo
parent 180b3d0626
commit a4455e0053
2 changed files with 15 additions and 0 deletions
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14
tools/perf/util/data.c
View File

@ -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;

1
tools/perf/util/data.h
View File

@ -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 */