149 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <stdbool.h>3#include <linux/err.h>4#include <linux/string.h>5#include <sys/types.h>6#include <sys/stat.h>7#include <fcntl.h>8#include "evlist.h"9#include "evsel.h"10#include "thread_map.h"11#include "record.h"12#include "tests.h"13#include "debug.h"14#include "util/mmap.h"15#include <errno.h>16#include <perf/mmap.h>17#include "util/sample.h"18 19#ifndef O_DIRECTORY20#define O_DIRECTORY 0020000021#endif22#ifndef AT_FDCWD23#define AT_FDCWD -10024#endif25 26static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused,27 int subtest __maybe_unused)28{29 struct record_opts opts = {30 .target = {31 .uid = UINT_MAX,32 .uses_mmap = true,33 },34 .no_buffering = true,35 .freq = 1,36 .mmap_pages = 256,37 .raw_samples = true,38 };39 const char *filename = "/etc/passwd";40 int flags = O_RDONLY | O_DIRECTORY;41 struct evlist *evlist = evlist__new();42 struct evsel *evsel;43 int err = -1, i, nr_events = 0, nr_polls = 0;44 char sbuf[STRERR_BUFSIZE];45 46 if (evlist == NULL) {47 pr_debug("%s: evlist__new\n", __func__);48 goto out;49 }50 51 evsel = evsel__newtp("syscalls", "sys_enter_openat");52 if (IS_ERR(evsel)) {53 pr_debug("%s: evsel__newtp\n", __func__);54 goto out_delete_evlist;55 }56 57 evlist__add(evlist, evsel);58 59 err = evlist__create_maps(evlist, &opts.target);60 if (err < 0) {61 pr_debug("%s: evlist__create_maps\n", __func__);62 goto out_delete_evlist;63 }64 65 evsel__config(evsel, &opts, NULL);66 67 perf_thread_map__set_pid(evlist->core.threads, 0, getpid());68 69 err = evlist__open(evlist);70 if (err < 0) {71 pr_debug("perf_evlist__open: %s\n",72 str_error_r(errno, sbuf, sizeof(sbuf)));73 goto out_delete_evlist;74 }75 76 err = evlist__mmap(evlist, UINT_MAX);77 if (err < 0) {78 pr_debug("evlist__mmap: %s\n",79 str_error_r(errno, sbuf, sizeof(sbuf)));80 goto out_delete_evlist;81 }82 83 evlist__enable(evlist);84 85 /*86 * Generate the event:87 */88 openat(AT_FDCWD, filename, flags);89 90 while (1) {91 int before = nr_events;92 93 for (i = 0; i < evlist->core.nr_mmaps; i++) {94 union perf_event *event;95 struct mmap *md;96 97 md = &evlist->mmap[i];98 if (perf_mmap__read_init(&md->core) < 0)99 continue;100 101 while ((event = perf_mmap__read_event(&md->core)) != NULL) {102 const u32 type = event->header.type;103 int tp_flags;104 struct perf_sample sample;105 106 ++nr_events;107 108 if (type != PERF_RECORD_SAMPLE) {109 perf_mmap__consume(&md->core);110 continue;111 }112 113 err = evsel__parse_sample(evsel, event, &sample);114 if (err) {115 pr_debug("Can't parse sample, err = %d\n", err);116 goto out_delete_evlist;117 }118 119 tp_flags = evsel__intval(evsel, &sample, "flags");120 121 if (flags != tp_flags) {122 pr_debug("%s: Expected flags=%#x, got %#x\n",123 __func__, flags, tp_flags);124 goto out_delete_evlist;125 }126 127 goto out_ok;128 }129 perf_mmap__read_done(&md->core);130 }131 132 if (nr_events == before)133 evlist__poll(evlist, 10);134 135 if (++nr_polls > 5) {136 pr_debug("%s: no events!\n", __func__);137 goto out_delete_evlist;138 }139 }140out_ok:141 err = 0;142out_delete_evlist:143 evlist__delete(evlist);144out:145 return err;146}147 148DEFINE_SUITE("syscalls:sys_enter_openat event fields", syscall_openat_tp_fields);149