1#include <linux/err.h>
  2#include "perf.h"
  3#include "evlist.h"
  4#include "evsel.h"
  5#include "thread_map.h"
  6#include "tests.h"
  7#include "debug.h"
  8
  9int test__syscall_openat_tp_fields(int subtest __maybe_unused)
 10{
 11	struct record_opts opts = {
 12		.target = {
 13			.uid = UINT_MAX,
 14			.uses_mmap = true,
 15		},
 16		.no_buffering = true,
 17		.freq	      = 1,
 18		.mmap_pages   = 256,
 19		.raw_samples  = true,
 20	};
 21	const char *filename = "/etc/passwd";
 22	int flags = O_RDONLY | O_DIRECTORY;
 23	struct perf_evlist *evlist = perf_evlist__new();
 24	struct perf_evsel *evsel;
 25	int err = -1, i, nr_events = 0, nr_polls = 0;
 26	char sbuf[STRERR_BUFSIZE];
 27
 28	if (evlist == NULL) {
 29		pr_debug("%s: perf_evlist__new\n", __func__);
 30		goto out;
 31	}
 32
 33	evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
 34	if (IS_ERR(evsel)) {
 35		pr_debug("%s: perf_evsel__newtp\n", __func__);
 36		goto out_delete_evlist;
 37	}
 38
 39	perf_evlist__add(evlist, evsel);
 40
 41	err = perf_evlist__create_maps(evlist, &opts.target);
 42	if (err < 0) {
 43		pr_debug("%s: perf_evlist__create_maps\n", __func__);
 44		goto out_delete_evlist;
 45	}
 46
 47	perf_evsel__config(evsel, &opts);
 48
 49	thread_map__set_pid(evlist->threads, 0, getpid());
 50
 51	err = perf_evlist__open(evlist);
 52	if (err < 0) {
 53		pr_debug("perf_evlist__open: %s\n",
 54			 strerror_r(errno, sbuf, sizeof(sbuf)));
 55		goto out_delete_evlist;
 56	}
 57
 58	err = perf_evlist__mmap(evlist, UINT_MAX, false);
 59	if (err < 0) {
 60		pr_debug("perf_evlist__mmap: %s\n",
 61			 strerror_r(errno, sbuf, sizeof(sbuf)));
 62		goto out_delete_evlist;
 63	}
 64
 65	perf_evlist__enable(evlist);
 66
 67	/*
 68	 * Generate the event:
 69	 */
 70	openat(AT_FDCWD, filename, flags);
 71
 72	while (1) {
 73		int before = nr_events;
 74
 75		for (i = 0; i < evlist->nr_mmaps; i++) {
 76			union perf_event *event;
 77
 78			while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
 79				const u32 type = event->header.type;
 80				int tp_flags;
 81				struct perf_sample sample;
 82
 83				++nr_events;
 84
 85				if (type != PERF_RECORD_SAMPLE) {
 86					perf_evlist__mmap_consume(evlist, i);
 87					continue;
 88				}
 89
 90				err = perf_evsel__parse_sample(evsel, event, &sample);
 91				if (err) {
 92					pr_debug("Can't parse sample, err = %d\n", err);
 93					goto out_delete_evlist;
 94				}
 95
 96				tp_flags = perf_evsel__intval(evsel, &sample, "flags");
 97
 98				if (flags != tp_flags) {
 99					pr_debug("%s: Expected flags=%#x, got %#x\n",
100						 __func__, flags, tp_flags);
101					goto out_delete_evlist;
102				}
103
104				goto out_ok;
105			}
106		}
107
108		if (nr_events == before)
109			perf_evlist__poll(evlist, 10);
110
111		if (++nr_polls > 5) {
112			pr_debug("%s: no events!\n", __func__);
113			goto out_delete_evlist;
114		}
115	}
116out_ok:
117	err = 0;
118out_delete_evlist:
119	perf_evlist__delete(evlist);
120out:
121	return err;
122}