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perf target: Introduce perf_target_errno 

The perf_target_errno enumerations are used to indicate specific error
cases on perf target operations. It'd help libperf being a more generic
library.

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Suggested-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
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/1336367344-28071-4-git-send-email-namhyung.kim@lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2012-05-07 14:09:00 +09:00 committed by Arnaldo Carvalho de Melo
parent 55261f4670
commit 60bbddaaa3
2 changed files with 46 additions and 12 deletions
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33
tools/perf/util/target.c
View File

@ -10,36 +10,47 @@
#include "debug.h"
void perf_target__validate(struct perf_target *target)
enum perf_target_errno perf_target__validate(struct perf_target *target)
{
enum perf_target_errno ret = PERF_ERRNO_TARGET__SUCCESS;
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;
if (ret == PERF_ERRNO_TARGET__SUCCESS)
ret = PERF_ERRNO_TARGET__PID_OVERRIDE_CPU;
}
/* 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;
if (ret == PERF_ERRNO_TARGET__SUCCESS)
ret = PERF_ERRNO_TARGET__PID_OVERRIDE_UID;
}
/* UID and CPU are mutually exclusive */
if (target->uid_str && target->cpu_list) {
ui__warning("UID switch overriding CPU\n");
sleep(1);
target->cpu_list = NULL;
if (ret == PERF_ERRNO_TARGET__SUCCESS)
ret = PERF_ERRNO_TARGET__UID_OVERRIDE_CPU;
}
/* PID/UID and SYSTEM are mutually exclusive */
if ((target->tid || target->uid_str) && target->system_wide) {
ui__warning("PID/TID/UID switch overriding CPU\n");
sleep(1);
/* PID and SYSTEM are mutually exclusive */
if (target->tid && target->system_wide) {
target->system_wide = false;
if (ret == PERF_ERRNO_TARGET__SUCCESS)
ret = PERF_ERRNO_TARGET__PID_OVERRIDE_SYSTEM;
}
/* UID and SYSTEM are mutually exclusive */
if (target->uid_str && target->system_wide) {
target->system_wide = false;
if (ret == PERF_ERRNO_TARGET__SUCCESS)
ret = PERF_ERRNO_TARGET__UID_OVERRIDE_SYSTEM;
}
return ret;
}

25
tools/perf/util/target.h
View File

@ -13,6 +13,29 @@ struct perf_target {
bool system_wide;
};
void perf_target__validate(struct perf_target *target);
enum perf_target_errno {
PERF_ERRNO_TARGET__SUCCESS = 0,
/*
* Choose an arbitrary negative big number not to clash with standard
* errno since SUS requires the errno has distinct positive values.
* See 'Issue 6' in the link below.
*
* http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
*/
__PERF_ERRNO_TARGET__START = -10000,
/* for perf_target__validate() */
PERF_ERRNO_TARGET__PID_OVERRIDE_CPU = __PERF_ERRNO_TARGET__START,
PERF_ERRNO_TARGET__PID_OVERRIDE_UID,
PERF_ERRNO_TARGET__UID_OVERRIDE_CPU,
PERF_ERRNO_TARGET__PID_OVERRIDE_SYSTEM,
PERF_ERRNO_TARGET__UID_OVERRIDE_SYSTEM,
__PERF_ERRNO_TARGET__END,
};
enum perf_target_errno perf_target__validate(struct perf_target *target);
#endif /* _PERF_TARGET_H */