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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/perf/tests/openat-syscall.c | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/tests/openat-syscall.c')
-rw-r--r-- | tools/perf/tests/openat-syscall.c | 68 |
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; +} |