148 строки
3.1 KiB
C
148 строки
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <stdbool.h>
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#include <linux/err.h>
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#include <linux/string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "evlist.h"
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#include "evsel.h"
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#include "thread_map.h"
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#include "record.h"
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#include "tests.h"
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#include "debug.h"
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#include "util/mmap.h"
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#include <errno.h>
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#include <perf/mmap.h>
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#ifndef O_DIRECTORY
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#define O_DIRECTORY 00200000
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#endif
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#ifndef AT_FDCWD
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#define AT_FDCWD -100
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#endif
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static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused,
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int subtest __maybe_unused)
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{
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struct record_opts opts = {
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.target = {
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.uid = UINT_MAX,
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.uses_mmap = true,
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},
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.no_buffering = true,
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.freq = 1,
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.mmap_pages = 256,
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.raw_samples = true,
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};
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const char *filename = "/etc/passwd";
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int flags = O_RDONLY | O_DIRECTORY;
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struct evlist *evlist = evlist__new();
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struct evsel *evsel;
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int err = -1, i, nr_events = 0, nr_polls = 0;
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char sbuf[STRERR_BUFSIZE];
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if (evlist == NULL) {
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pr_debug("%s: evlist__new\n", __func__);
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goto out;
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}
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evsel = evsel__newtp("syscalls", "sys_enter_openat");
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if (IS_ERR(evsel)) {
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pr_debug("%s: evsel__newtp\n", __func__);
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goto out_delete_evlist;
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}
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evlist__add(evlist, evsel);
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err = evlist__create_maps(evlist, &opts.target);
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if (err < 0) {
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pr_debug("%s: evlist__create_maps\n", __func__);
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goto out_delete_evlist;
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}
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evsel__config(evsel, &opts, NULL);
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perf_thread_map__set_pid(evlist->core.threads, 0, getpid());
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err = evlist__open(evlist);
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if (err < 0) {
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pr_debug("perf_evlist__open: %s\n",
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str_error_r(errno, sbuf, sizeof(sbuf)));
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goto out_delete_evlist;
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}
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err = evlist__mmap(evlist, UINT_MAX);
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if (err < 0) {
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pr_debug("evlist__mmap: %s\n",
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str_error_r(errno, sbuf, sizeof(sbuf)));
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goto out_delete_evlist;
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}
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evlist__enable(evlist);
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/*
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* Generate the event:
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*/
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openat(AT_FDCWD, filename, flags);
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while (1) {
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int before = nr_events;
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for (i = 0; i < evlist->core.nr_mmaps; i++) {
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union perf_event *event;
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struct mmap *md;
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md = &evlist->mmap[i];
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if (perf_mmap__read_init(&md->core) < 0)
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continue;
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while ((event = perf_mmap__read_event(&md->core)) != NULL) {
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const u32 type = event->header.type;
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int tp_flags;
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struct perf_sample sample;
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++nr_events;
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if (type != PERF_RECORD_SAMPLE) {
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perf_mmap__consume(&md->core);
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continue;
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}
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err = evsel__parse_sample(evsel, event, &sample);
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if (err) {
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pr_debug("Can't parse sample, err = %d\n", err);
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goto out_delete_evlist;
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}
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tp_flags = evsel__intval(evsel, &sample, "flags");
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if (flags != tp_flags) {
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pr_debug("%s: Expected flags=%#x, got %#x\n",
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__func__, flags, tp_flags);
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goto out_delete_evlist;
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}
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goto out_ok;
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}
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perf_mmap__read_done(&md->core);
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}
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if (nr_events == before)
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evlist__poll(evlist, 10);
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if (++nr_polls > 5) {
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pr_debug("%s: no events!\n", __func__);
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goto out_delete_evlist;
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}
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}
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out_ok:
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err = 0;
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out_delete_evlist:
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evlist__delete(evlist);
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out:
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return err;
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}
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DEFINE_SUITE("syscalls:sys_enter_openat event fields", syscall_openat_tp_fields);
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