| 1 | |
| 2 | #include <errno.h>
|
| 3 | #include <inttypes.h>
|
| 4 | #include <api/fs/tracing_path.h>
|
| 5 | #include <linux/err.h>
|
| 6 | #include <linux/string.h>
|
| 7 | #include <sys/types.h>
|
| 8 | #include <sys/stat.h>
|
| 9 | #include <fcntl.h>
|
| 10 | #include <unistd.h>
|
| 11 | #include "thread_map.h"
|
| 12 | #include "evsel.h"
|
| 13 | #include "debug.h"
|
| 14 | #include "tests.h"
|
| 15 | #include "util/counts.h"
|
| 16 |
|
| 17 | static int test__openat_syscall_event(struct test_suite *test __maybe_unused,
|
| 18 | int subtest __maybe_unused)
|
| 19 | {
|
| 20 | int err = TEST_FAIL, fd;
|
| 21 | struct evsel *evsel;
|
| 22 | unsigned int nr_openat_calls = 111, i;
|
| 23 | struct perf_thread_map *threads = thread_map__new_by_tid(getpid());
|
| 24 | char sbuf[STRERR_BUFSIZE];
|
| 25 | char errbuf[BUFSIZ];
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| 26 |
|
| 27 | if (threads == NULL) {
|
| 28 | pr_debug("thread_map__new\n");
|
| 29 | return TEST_FAIL;
|
| 30 | }
|
| 31 |
|
| 32 | evsel = evsel__newtp("syscalls", "sys_enter_openat");
|
| 33 | if (IS_ERR(evsel)) {
|
| 34 | tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat");
|
| 35 | pr_debug("%s\n", errbuf);
|
| 36 | err = TEST_SKIP;
|
| 37 | goto out_thread_map_delete;
|
| 38 | }
|
| 39 |
|
| 40 | if (evsel__open_per_thread(evsel, threads) < 0) {
|
| 41 | pr_debug("failed to open counter: %s, "
|
| 42 | "tweak /proc/sys/kernel/perf_event_paranoid?\n",
|
| 43 | str_error_r(errno, sbuf, sizeof(sbuf)));
|
| 44 | err = TEST_SKIP;
|
| 45 | goto out_evsel_put;
|
| 46 | }
|
| 47 |
|
| 48 | for (i = 0; i < nr_openat_calls; ++i) {
|
| 49 | fd = openat(0, "/etc/passwd", O_RDONLY);
|
| 50 | close(fd);
|
| 51 | }
|
| 52 |
|
| 53 | if (evsel__read_on_cpu(evsel, 0, 0) < 0) {
|
| 54 | pr_debug("evsel__read_on_cpu\n");
|
| 55 | goto out_close_fd;
|
| 56 | }
|
| 57 |
|
| 58 | if (perf_counts(evsel->counts, 0, 0)->val != nr_openat_calls) {
|
| 59 | pr_debug("evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
|
| 60 | nr_openat_calls, perf_counts(evsel->counts, 0, 0)->val);
|
| 61 | goto out_close_fd;
|
| 62 | }
|
| 63 |
|
| 64 | err = TEST_OK;
|
| 65 | out_close_fd:
|
| 66 | perf_evsel__close_fd(&evsel->core);
|
| 67 | out_evsel_put:
|
| 68 | evsel__put(evsel);
|
| 69 | out_thread_map_delete:
|
| 70 | perf_thread_map__put(threads);
|
| 71 | return err;
|
| 72 | }
|
| 73 |
|
| 74 | static struct test_case tests__openat_syscall_event[] = {
|
| 75 | TEST_CASE_REASON("Detect openat syscall event",
|
| 76 | openat_syscall_event,
|
| 77 | "permissions"),
|
| 78 | { .name = NULL, }
|
| 79 | };
|
| 80 |
|
| 81 | struct test_suite suite__openat_syscall_event = {
|
| 82 | .desc = "Detect openat syscall event",
|
| 83 | .test_cases = tests__openat_syscall_event,
|
| 84 | };
|