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tools lib api fs tracing_path: Introduce get/put_events_file() helpers

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To make reading events files a tad more compact than with
get_tracing_files("events/foo").

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-do6xgtwpmfl8zjs1euxsd2du@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2018-05-16 16:42:26 -03:00
parent 17c257e867
commit 40c3c0c9ac
3 changed files with 25 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
tools/lib/api/fs/tracing_path.c
View File

@ -86,6 +86,21 @@ void put_tracing_file(char *file)
free(file);
}
char *get_events_file(const char *name)
{
char *file;
if (asprintf(&file, "%s/events/%s", tracing_path_mount(), name) < 0)
return NULL;
return file;
}
void put_events_file(char *file)
{
free(file);
}
int tracing_path__strerror_open_tp(int err, char *buf, size_t size,
const char *sys, const char *name)
{

5
tools/lib/api/fs/tracing_path.h
View File

@ -12,5 +12,10 @@ const char *tracing_path_mount(void);
char *get_tracing_file(const char *name);
void put_tracing_file(char *file);
char *get_events_file(const char *name);
void put_events_file(char *file);
#define zput_events_file(ptr) ({ free(*ptr); *ptr = NULL; })
int tracing_path__strerror_open_tp(int err, char *buf, size_t size, const char *sys, const char *name);
#endif /* __API_FS_TRACING_PATH_H */

11
tools/perf/util/trace-event-info.c
View File

@ -103,11 +103,10 @@ out:
static int record_header_files(void)
{
char *path;
char *path = get_events_file("header_page");
struct stat st;
int err = -EIO;
path = get_tracing_file("events/header_page");
if (!path) {
pr_debug("can't get tracing/events/header_page");
return -ENOMEM;
@ -128,9 +127,9 @@ static int record_header_files(void)
goto out;
}
put_tracing_file(path);
put_events_file(path);
path = get_tracing_file("events/header_event");
path = get_events_file("header_event");
if (!path) {
pr_debug("can't get tracing/events/header_event");
err = -ENOMEM;
@ -154,7 +153,7 @@ static int record_header_files(void)
err = 0;
out:
put_tracing_file(path);
put_events_file(path);
return err;
}
@ -243,7 +242,7 @@ static int record_ftrace_files(struct tracepoint_path *tps)
char *path;
int ret;
path = get_tracing_file("events/ftrace");
path = get_events_file("ftrace");
if (!path) {
pr_debug("can't get tracing/events/ftrace");
return -ENOMEM;