1 // SPDX-License-Identifier: GPL-2.0 2 #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 18 #ifndef O_DIRECTORY 19 #define O_DIRECTORY 00200000 20 #endif 21 #ifndef AT_FDCWD 22 #define AT_FDCWD -100 23 #endif 24 25 static int test__syscall_openat_tp_fields(struct test_suite *test __maybe_unused, 26 int subtest __maybe_unused) 27 { 28 struct record_opts opts = { 29 .target = { 30 .uid = UINT_MAX, 31 .uses_mmap = true, 32 }, 33 .no_buffering = true, 34 .freq = 1, 35 .mmap_pages = 256, 36 .raw_samples = true, 37 }; 38 const char *filename = "/etc/passwd"; 39 int flags = O_RDONLY | O_DIRECTORY; 40 struct evlist *evlist = evlist__new(); 41 struct evsel *evsel; 42 int err = -1, i, nr_events = 0, nr_polls = 0; 43 char sbuf[STRERR_BUFSIZE]; 44 45 if (evlist == NULL) { 46 pr_debug("%s: evlist__new\n", __func__); 47 goto out; 48 } 49 50 evsel = evsel__newtp("syscalls", "sys_enter_openat"); 51 if (IS_ERR(evsel)) { 52 pr_debug("%s: evsel__newtp\n", __func__); 53 goto out_delete_evlist; 54 } 55 56 evlist__add(evlist, evsel); 57 58 err = evlist__create_maps(evlist, &opts.target); 59 if (err < 0) { 60 pr_debug("%s: evlist__create_maps\n", __func__); 61 goto out_delete_evlist; 62 } 63 64 evsel__config(evsel, &opts, NULL); 65 66 perf_thread_map__set_pid(evlist->core.threads, 0, getpid()); 67 68 err = evlist__open(evlist); 69 if (err < 0) { 70 pr_debug("perf_evlist__open: %s\n", 71 str_error_r(errno, sbuf, sizeof(sbuf))); 72 goto out_delete_evlist; 73 } 74 75 err = evlist__mmap(evlist, UINT_MAX); 76 if (err < 0) { 77 pr_debug("evlist__mmap: %s\n", 78 str_error_r(errno, sbuf, sizeof(sbuf))); 79 goto out_delete_evlist; 80 } 81 82 evlist__enable(evlist); 83 84 /* 85 * Generate the event: 86 */ 87 openat(AT_FDCWD, filename, flags); 88 89 while (1) { 90 int before = nr_events; 91 92 for (i = 0; i < evlist->core.nr_mmaps; i++) { 93 union perf_event *event; 94 struct mmap *md; 95 96 md = &evlist->mmap[i]; 97 if (perf_mmap__read_init(&md->core) < 0) 98 continue; 99 100 while ((event = perf_mmap__read_event(&md->core)) != NULL) { 101 const u32 type = event->header.type; 102 int tp_flags; 103 struct perf_sample sample; 104 105 ++nr_events; 106 107 if (type != PERF_RECORD_SAMPLE) { 108 perf_mmap__consume(&md->core); 109 continue; 110 } 111 112 err = evsel__parse_sample(evsel, event, &sample); 113 if (err) { 114 pr_debug("Can't parse sample, err = %d\n", err); 115 goto out_delete_evlist; 116 } 117 118 tp_flags = evsel__intval(evsel, &sample, "flags"); 119 120 if (flags != tp_flags) { 121 pr_debug("%s: Expected flags=%#x, got %#x\n", 122 __func__, flags, tp_flags); 123 goto out_delete_evlist; 124 } 125 126 goto out_ok; 127 } 128 perf_mmap__read_done(&md->core); 129 } 130 131 if (nr_events == before) 132 evlist__poll(evlist, 10); 133 134 if (++nr_polls > 5) { 135 pr_debug("%s: no events!\n", __func__); 136 goto out_delete_evlist; 137 } 138 } 139 out_ok: 140 err = 0; 141 out_delete_evlist: 142 evlist__delete(evlist); 143 out: 144 return err; 145 } 146 147 DEFINE_SUITE("syscalls:sys_enter_openat event fields", syscall_openat_tp_fields); 148