linux_dsm_epyc7002/tools/perf/builtin-evlist.c
Irina Tirdea 1d037ca164 perf tools: Use __maybe_used for unused variables
perf defines both __used and __unused variables to use for marking
unused variables. The variable __used is defined to
__attribute__((__unused__)), which contradicts the kernel definition to
__attribute__((__used__)) for new gcc versions. On Android, __used is
also defined in system headers and this leads to warnings like: warning:
'__used__' attribute ignored

__unused is not defined in the kernel and is not a standard definition.
If __unused is included everywhere instead of __used, this leads to
conflicts with glibc headers, since glibc has a variables with this name
in its headers.

The best approach is to use __maybe_unused, the definition used in the
kernel for __attribute__((unused)). In this way there is only one
definition in perf sources (instead of 2 definitions that point to the
same thing: __used and __unused) and it works on both Linux and Android.
This patch simply replaces all instances of __used and __unused with
__maybe_unused.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1347315303-29906-7-git-send-email-irina.tirdea@intel.com
[ committer note: fixed up conflict with a116e05 in builtin-sched.c ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-09-11 12:19:15 -03:00

136 lines
2.9 KiB
C

/*
* Builtin evlist command: Show the list of event selectors present
* in a perf.data file.
*/
#include "builtin.h"
#include "util/util.h"
#include <linux/list.h>
#include "perf.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/parse-events.h"
#include "util/parse-options.h"
#include "util/session.h"
struct perf_attr_details {
bool freq;
bool verbose;
};
static int comma_printf(bool *first, const char *fmt, ...)
{
va_list args;
int ret = 0;
if (!*first) {
ret += printf(",");
} else {
ret += printf(":");
*first = false;
}
va_start(args, fmt);
ret += vprintf(fmt, args);
va_end(args);
return ret;
}
static int __if_print(bool *first, const char *field, u64 value)
{
if (value == 0)
return 0;
return comma_printf(first, " %s: %" PRIu64, field, value);
}
#define if_print(field) __if_print(&first, #field, pos->attr.field)
static int __cmd_evlist(const char *input_name, struct perf_attr_details *details)
{
struct perf_session *session;
struct perf_evsel *pos;
session = perf_session__new(input_name, O_RDONLY, 0, false, NULL);
if (session == NULL)
return -ENOMEM;
list_for_each_entry(pos, &session->evlist->entries, node) {
bool first = true;
printf("%s", perf_evsel__name(pos));
if (details->verbose || details->freq) {
comma_printf(&first, " sample_freq=%" PRIu64,
(u64)pos->attr.sample_freq);
}
if (details->verbose) {
if_print(type);
if_print(config);
if_print(config1);
if_print(config2);
if_print(size);
if_print(sample_type);
if_print(read_format);
if_print(disabled);
if_print(inherit);
if_print(pinned);
if_print(exclusive);
if_print(exclude_user);
if_print(exclude_kernel);
if_print(exclude_hv);
if_print(exclude_idle);
if_print(mmap);
if_print(comm);
if_print(freq);
if_print(inherit_stat);
if_print(enable_on_exec);
if_print(task);
if_print(watermark);
if_print(precise_ip);
if_print(mmap_data);
if_print(sample_id_all);
if_print(exclude_host);
if_print(exclude_guest);
if_print(__reserved_1);
if_print(wakeup_events);
if_print(bp_type);
if_print(branch_sample_type);
}
putchar('\n');
}
perf_session__delete(session);
return 0;
}
static const char * const evlist_usage[] = {
"perf evlist [<options>]",
NULL
};
int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused)
{
struct perf_attr_details details = { .verbose = false, };
const char *input_name = NULL;
const struct option options[] = {
OPT_STRING('i', "input", &input_name, "file",
"Input file name"),
OPT_BOOLEAN('F', "freq", &details.freq,
"Show the sample frequency"),
OPT_BOOLEAN('v', "verbose", &details.verbose,
"Show all event attr details"),
OPT_END()
};
argc = parse_options(argc, argv, options, evlist_usage, 0);
if (argc)
usage_with_options(evlist_usage, options);
return __cmd_evlist(input_name, &details);
}