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perf tools: Introduce perf_target__validate() helper

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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>
This commit is contained in:
Namhyung Kim
2012-04-26 14:15:18 +09:00
committed by Arnaldo Carvalho de Melo
parent fe9d18a71d
commit 4bd0f2d2c0
5 changed files with 31 additions and 29 deletions
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29
tools/perf/util/usage.c
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@@ -83,7 +83,7 @@ void warning(const char *warn, ...)
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 @@ uid_t parse_target_uid(const char *str, const char *tid, const char *pid)
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 @@ uid_t parse_target_uid(const char *str, const char *tid, const char *pid)
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;
}
}