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// SPDX-License-Identifier: GPL-2.0
#include <linux/err.h>
#include "perf.h"
#include "evlist.h"
#include "evsel.h"
#include "thread_map.h"
#include "tests.h"
#include "debug.h"
#include <errno.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 perf_evlist *evlist = perf_evlist__new();
struct perf_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;
}
perf_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);
thread_map__set_pid(evlist->threads, 0, getpid());
err = perf_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 = perf_evlist__mmap(evlist, UINT_MAX, false);
if (err < 0) {
pr_debug("perf_evlist__mmap: %s\n",
str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}
perf_evlist__enable(evlist);
/*
* Generate the event:
*/
openat(AT_FDCWD, filename, flags);
while (1) {
int before = nr_events;
for (i = 0; i < evlist->nr_mmaps; i++) {
union perf_event *event;
while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
const u32 type = event->header.type;
int tp_flags;
struct perf_sample sample;
++nr_events;
if (type != PERF_RECORD_SAMPLE) {
perf_evlist__mmap_consume(evlist, i);
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;
}
}
if (nr_events == before)
perf_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:
perf_evlist__delete(evlist);
out:
return err;
}
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