forked from Minki/linux
151ed5d70d
Move perf_mmap__read_event() from tools/perf to libperf and export it in the perf/mmap.h header. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20191007125344.14268-13-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
145 lines
3.0 KiB
C
145 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <stdbool.h>
|
|
#include <linux/err.h>
|
|
#include <linux/string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include "evlist.h"
|
|
#include "evsel.h"
|
|
#include "thread_map.h"
|
|
#include "record.h"
|
|
#include "tests.h"
|
|
#include "debug.h"
|
|
#include "util/mmap.h"
|
|
#include <errno.h>
|
|
#include <perf/mmap.h>
|
|
|
|
#ifndef O_DIRECTORY
|
|
#define O_DIRECTORY 00200000
|
|
#endif
|
|
#ifndef AT_FDCWD
|
|
#define AT_FDCWD -100
|
|
#endif
|
|
|
|
int test__syscall_openat_tp_fields(struct test *test __maybe_unused, int subtest __maybe_unused)
|
|
{
|
|
struct record_opts opts = {
|
|
.target = {
|
|
.uid = UINT_MAX,
|
|
.uses_mmap = true,
|
|
},
|
|
.no_buffering = true,
|
|
.freq = 1,
|
|
.mmap_pages = 256,
|
|
.raw_samples = true,
|
|
};
|
|
const char *filename = "/etc/passwd";
|
|
int flags = O_RDONLY | O_DIRECTORY;
|
|
struct evlist *evlist = evlist__new();
|
|
struct evsel *evsel;
|
|
int err = -1, i, nr_events = 0, nr_polls = 0;
|
|
char sbuf[STRERR_BUFSIZE];
|
|
|
|
if (evlist == NULL) {
|
|
pr_debug("%s: perf_evlist__new\n", __func__);
|
|
goto out;
|
|
}
|
|
|
|
evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
|
|
if (IS_ERR(evsel)) {
|
|
pr_debug("%s: perf_evsel__newtp\n", __func__);
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
evlist__add(evlist, evsel);
|
|
|
|
err = perf_evlist__create_maps(evlist, &opts.target);
|
|
if (err < 0) {
|
|
pr_debug("%s: perf_evlist__create_maps\n", __func__);
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
perf_evsel__config(evsel, &opts, NULL);
|
|
|
|
perf_thread_map__set_pid(evlist->core.threads, 0, getpid());
|
|
|
|
err = evlist__open(evlist);
|
|
if (err < 0) {
|
|
pr_debug("perf_evlist__open: %s\n",
|
|
str_error_r(errno, sbuf, sizeof(sbuf)));
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
err = evlist__mmap(evlist, UINT_MAX);
|
|
if (err < 0) {
|
|
pr_debug("evlist__mmap: %s\n",
|
|
str_error_r(errno, sbuf, sizeof(sbuf)));
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
evlist__enable(evlist);
|
|
|
|
/*
|
|
* Generate the event:
|
|
*/
|
|
openat(AT_FDCWD, filename, flags);
|
|
|
|
while (1) {
|
|
int before = nr_events;
|
|
|
|
for (i = 0; i < evlist->core.nr_mmaps; i++) {
|
|
union perf_event *event;
|
|
struct mmap *md;
|
|
|
|
md = &evlist->mmap[i];
|
|
if (perf_mmap__read_init(&md->core) < 0)
|
|
continue;
|
|
|
|
while ((event = perf_mmap__read_event(&md->core)) != NULL) {
|
|
const u32 type = event->header.type;
|
|
int tp_flags;
|
|
struct perf_sample sample;
|
|
|
|
++nr_events;
|
|
|
|
if (type != PERF_RECORD_SAMPLE) {
|
|
perf_mmap__consume(&md->core);
|
|
continue;
|
|
}
|
|
|
|
err = perf_evsel__parse_sample(evsel, event, &sample);
|
|
if (err) {
|
|
pr_debug("Can't parse sample, err = %d\n", err);
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
tp_flags = perf_evsel__intval(evsel, &sample, "flags");
|
|
|
|
if (flags != tp_flags) {
|
|
pr_debug("%s: Expected flags=%#x, got %#x\n",
|
|
__func__, flags, tp_flags);
|
|
goto out_delete_evlist;
|
|
}
|
|
|
|
goto out_ok;
|
|
}
|
|
perf_mmap__read_done(&md->core);
|
|
}
|
|
|
|
if (nr_events == before)
|
|
evlist__poll(evlist, 10);
|
|
|
|
if (++nr_polls > 5) {
|
|
pr_debug("%s: no events!\n", __func__);
|
|
goto out_delete_evlist;
|
|
}
|
|
}
|
|
out_ok:
|
|
err = 0;
|
|
out_delete_evlist:
|
|
evlist__delete(evlist);
|
|
out:
|
|
return err;
|
|
}
|