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-rw-r--r--tools/perf/tests/openat-syscall.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/tools/perf/tests/openat-syscall.c b/tools/perf/tests/openat-syscall.c
new file mode 100644
index 000000000..85a8f0fe7
--- /dev/null
+++ b/tools/perf/tests/openat-syscall.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <errno.h>
+#include <inttypes.h>
+#include <api/fs/tracing_path.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include "thread_map.h"
+#include "evsel.h"
+#include "debug.h"
+#include "tests.h"
+#include "util/counts.h"
+
+int test__openat_syscall_event(struct test *test __maybe_unused, int subtest __maybe_unused)
+{
+ int err = -1, fd;
+ struct evsel *evsel;
+ unsigned int nr_openat_calls = 111, i;
+ struct perf_thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
+ char sbuf[STRERR_BUFSIZE];
+ char errbuf[BUFSIZ];
+
+ if (threads == NULL) {
+ pr_debug("thread_map__new\n");
+ return -1;
+ }
+
+ evsel = evsel__newtp("syscalls", "sys_enter_openat");
+ if (IS_ERR(evsel)) {
+ tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat");
+ pr_debug("%s\n", errbuf);
+ goto out_thread_map_delete;
+ }
+
+ if (evsel__open_per_thread(evsel, threads) < 0) {
+ pr_debug("failed to open counter: %s, "
+ "tweak /proc/sys/kernel/perf_event_paranoid?\n",
+ str_error_r(errno, sbuf, sizeof(sbuf)));
+ goto out_evsel_delete;
+ }
+
+ for (i = 0; i < nr_openat_calls; ++i) {
+ fd = openat(0, "/etc/passwd", O_RDONLY);
+ close(fd);
+ }
+
+ if (evsel__read_on_cpu(evsel, 0, 0) < 0) {
+ pr_debug("evsel__read_on_cpu\n");
+ goto out_close_fd;
+ }
+
+ if (perf_counts(evsel->counts, 0, 0)->val != nr_openat_calls) {
+ pr_debug("evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
+ nr_openat_calls, perf_counts(evsel->counts, 0, 0)->val);
+ goto out_close_fd;
+ }
+
+ err = 0;
+out_close_fd:
+ perf_evsel__close_fd(&evsel->core);
+out_evsel_delete:
+ evsel__delete(evsel);
+out_thread_map_delete:
+ perf_thread_map__put(threads);
+ return err;
+}