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
  9#ifndef O_DIRECTORY
 10#define O_DIRECTORY    00200000
 11#endif
 12#ifndef AT_FDCWD
 13#define AT_FDCWD       -100
 14#endif
 15
 16int test__syscall_openat_tp_fields(int subtest __maybe_unused)
 17{
 18	struct record_opts opts = {
 19		.target = {
 20			.uid = UINT_MAX,
 21			.uses_mmap = true,
 22		},
 23		.no_buffering = true,
 24		.freq	      = 1,
 25		.mmap_pages   = 256,
 26		.raw_samples  = true,
 27	};
 28	const char *filename = "/etc/passwd";
 29	int flags = O_RDONLY | O_DIRECTORY;
 30	struct perf_evlist *evlist = perf_evlist__new();
 31	struct perf_evsel *evsel;
 32	int err = -1, i, nr_events = 0, nr_polls = 0;
 33	char sbuf[STRERR_BUFSIZE];
 34
 35	if (evlist == NULL) {
 36		pr_debug("%s: perf_evlist__new\n", __func__);
 37		goto out;
 38	}
 39
 40	evsel = perf_evsel__newtp("syscalls", "sys_enter_openat");
 41	if (IS_ERR(evsel)) {
 42		pr_debug("%s: perf_evsel__newtp\n", __func__);
 43		goto out_delete_evlist;
 44	}
 45
 46	perf_evlist__add(evlist, evsel);
 47
 48	err = perf_evlist__create_maps(evlist, &opts.target);
 49	if (err < 0) {
 50		pr_debug("%s: perf_evlist__create_maps\n", __func__);
 51		goto out_delete_evlist;
 52	}
 53
 54	perf_evsel__config(evsel, &opts, NULL);
 55
 56	thread_map__set_pid(evlist->threads, 0, getpid());
 57
 58	err = perf_evlist__open(evlist);
 59	if (err < 0) {
 60		pr_debug("perf_evlist__open: %s\n",
 61			 str_error_r(errno, sbuf, sizeof(sbuf)));
 62		goto out_delete_evlist;
 63	}
 64
 65	err = perf_evlist__mmap(evlist, UINT_MAX, false);
 66	if (err < 0) {
 67		pr_debug("perf_evlist__mmap: %s\n",
 68			 str_error_r(errno, sbuf, sizeof(sbuf)));
 69		goto out_delete_evlist;
 70	}
 71
 72	perf_evlist__enable(evlist);
 73
 74	/*
 75	 * Generate the event:
 76	 */
 77	openat(AT_FDCWD, filename, flags);
 78
 79	while (1) {
 80		int before = nr_events;
 81
 82		for (i = 0; i < evlist->nr_mmaps; i++) {
 83			union perf_event *event;
 84
 85			while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
 86				const u32 type = event->header.type;
 87				int tp_flags;
 88				struct perf_sample sample;
 89
 90				++nr_events;
 91
 92				if (type != PERF_RECORD_SAMPLE) {
 93					perf_evlist__mmap_consume(evlist, i);
 94					continue;
 95				}
 96
 97				err = perf_evsel__parse_sample(evsel, event, &sample);
 98				if (err) {
 99					pr_debug("Can't parse sample, err = %d\n", err);
100					goto out_delete_evlist;
101				}
102
103				tp_flags = perf_evsel__intval(evsel, &sample, "flags");
104
105				if (flags != tp_flags) {
106					pr_debug("%s: Expected flags=%#x, got %#x\n",
107						 __func__, flags, tp_flags);
108					goto out_delete_evlist;
109				}
110
111				goto out_ok;
112			}
113		}
114
115		if (nr_events == before)
116			perf_evlist__poll(evlist, 10);
117
118		if (++nr_polls > 5) {
119			pr_debug("%s: no events!\n", __func__);
120			goto out_delete_evlist;
121		}
122	}
123out_ok:
124	err = 0;
125out_delete_evlist:
126	perf_evlist__delete(evlist);
127out:
128	return err;
129}