perf tools: Introduce perf_target__validate() helper
The perf_target__validate function is used to check given PID/TID/UID/CPU
target options and warn if some combination is impossible. Also this can
make some arguments of parse_target_uid() function useless as it is checked
before the call via our new helper.
Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1335417327-11796-5-git-send-email-namhyung.kim@lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 4dcf270..3596cca 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -884,16 +884,13 @@
goto out_symbol_exit;
}
- rec->opts.target.uid = parse_target_uid(rec->opts.target.uid_str,
- rec->opts.target.tid,
- rec->opts.target.pid);
+ perf_target__validate(&rec->opts.target);
+
+ rec->opts.target.uid = parse_target_uid(rec->opts.target.uid_str);
if (rec->opts.target.uid_str != NULL &&
rec->opts.target.uid == UINT_MAX - 1)
goto out_free_fd;
- if (rec->opts.target.pid)
- rec->opts.target.tid = rec->opts.target.pid;
-
if (perf_evlist__create_maps(evsel_list, rec->opts.target.pid,
rec->opts.target.tid, rec->opts.target.uid,
rec->opts.target.cpu_list) < 0)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 1ca767d..bb77232 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1203,8 +1203,7 @@
if (add_default_attributes())
goto out;
- if (target.pid)
- target.tid = target.pid;
+ perf_target__validate(&target);
evsel_list->threads = thread_map__new_str(target.pid,
target.tid, UINT_MAX);
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 2c1c207..4f47952 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1252,21 +1252,12 @@
setup_browser(false);
- top.target.uid = parse_target_uid(top.target.uid_str, top.target.tid,
- top.target.pid);
+ perf_target__validate(&top.target);
+
+ top.target.uid = parse_target_uid(top.target.uid_str);
if (top.target.uid_str != NULL && top.target.uid == UINT_MAX - 1)
goto out_delete_evlist;
- /* CPU and PID are mutually exclusive */
- if (top.target.tid && top.target.cpu_list) {
- printf("WARNING: PID switch overriding CPU\n");
- sleep(1);
- top.target.cpu_list = NULL;
- }
-
- if (top.target.pid)
- top.target.tid = top.target.pid;
-
if (perf_evlist__create_maps(top.evlist, top.target.pid,
top.target.tid, top.target.uid,
top.target.cpu_list) < 0)
diff --git a/tools/perf/util/usage.c b/tools/perf/util/usage.c
index 52bb07c..0a1a885 100644
--- a/tools/perf/util/usage.c
+++ b/tools/perf/util/usage.c
@@ -83,7 +83,7 @@
va_end(params);
}
-uid_t parse_target_uid(const char *str, const char *tid, const char *pid)
+uid_t parse_target_uid(const char *str)
{
struct passwd pwd, *result;
char buf[1024];
@@ -91,13 +91,6 @@
if (str == NULL)
return UINT_MAX;
- /* UID and PID are mutually exclusive */
- if (tid || pid) {
- ui__warning("PID/TID switch overriding UID\n");
- sleep(1);
- return UINT_MAX;
- }
-
getpwnam_r(str, &pwd, buf, sizeof(buf), &result);
if (result == NULL) {
@@ -120,3 +113,23 @@
return result->pw_uid;
}
+
+void perf_target__validate(struct perf_target *target)
+{
+ if (target->pid)
+ target->tid = target->pid;
+
+ /* CPU and PID are mutually exclusive */
+ if (target->tid && target->cpu_list) {
+ ui__warning("WARNING: PID switch overriding CPU\n");
+ sleep(1);
+ target->cpu_list = NULL;
+ }
+
+ /* UID and PID are mutually exclusive */
+ if (target->tid && target->uid_str) {
+ ui__warning("PID/TID switch overriding UID\n");
+ sleep(1);
+ target->uid_str = NULL;
+ }
+}
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 0f99f39..3f05d62 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -246,10 +246,12 @@
int readn(int fd, void *buf, size_t size);
struct perf_event_attr;
+struct perf_target;
void event_attr_init(struct perf_event_attr *attr);
-uid_t parse_target_uid(const char *str, const char *tid, const char *pid);
+uid_t parse_target_uid(const char *str);
+void perf_target__validate(struct perf_target *target);
#define _STR(x) #x
#define STR(x) _STR(x)