f9b10c82fa
Failures to open the tracepoint cause this test to fail, however,
typically such failures are permission related. Lower the failure to
just skipping the test in those cases and add a skip reason.
Committer testing:
Before:
$ perf test "openat syscall"
2: Detect openat syscall event : FAILED!
3: Detect openat syscall event on all cpus : FAILED!
$
After:
$ perf test "openat syscall"
2: Detect openat syscall event : Skip (permissions)
3: Detect openat syscall event on all cpus : Skip (permissions)
$
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Carsten Haitzler <carsten.haitzler@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Marco Elver <elver@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20220518042027.836799-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <errno.h>
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#include <inttypes.h>
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#include <api/fs/tracing_path.h>
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#include <linux/err.h>
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#include <linux/string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "thread_map.h"
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#include "evsel.h"
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#include "debug.h"
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#include "tests.h"
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#include "util/counts.h"
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static int test__openat_syscall_event(struct test_suite *test __maybe_unused,
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int subtest __maybe_unused)
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{
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int err = TEST_FAIL, fd;
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struct evsel *evsel;
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unsigned int nr_openat_calls = 111, i;
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struct perf_thread_map *threads = thread_map__new(-1, getpid(), UINT_MAX);
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char sbuf[STRERR_BUFSIZE];
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char errbuf[BUFSIZ];
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if (threads == NULL) {
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pr_debug("thread_map__new\n");
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return TEST_FAIL;
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}
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evsel = evsel__newtp("syscalls", "sys_enter_openat");
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if (IS_ERR(evsel)) {
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tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "syscalls", "sys_enter_openat");
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pr_debug("%s\n", errbuf);
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err = TEST_SKIP;
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goto out_thread_map_delete;
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}
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if (evsel__open_per_thread(evsel, threads) < 0) {
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pr_debug("failed to open counter: %s, "
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"tweak /proc/sys/kernel/perf_event_paranoid?\n",
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str_error_r(errno, sbuf, sizeof(sbuf)));
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err = TEST_SKIP;
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goto out_evsel_delete;
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}
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for (i = 0; i < nr_openat_calls; ++i) {
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fd = openat(0, "/etc/passwd", O_RDONLY);
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close(fd);
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}
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if (evsel__read_on_cpu(evsel, 0, 0) < 0) {
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pr_debug("evsel__read_on_cpu\n");
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goto out_close_fd;
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}
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if (perf_counts(evsel->counts, 0, 0)->val != nr_openat_calls) {
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pr_debug("evsel__read_on_cpu: expected to intercept %d calls, got %" PRIu64 "\n",
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nr_openat_calls, perf_counts(evsel->counts, 0, 0)->val);
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goto out_close_fd;
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}
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err = TEST_OK;
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out_close_fd:
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perf_evsel__close_fd(&evsel->core);
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out_evsel_delete:
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evsel__delete(evsel);
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out_thread_map_delete:
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perf_thread_map__put(threads);
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return err;
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}
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static struct test_case tests__openat_syscall_event[] = {
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TEST_CASE_REASON("Detect openat syscall event",
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openat_syscall_event,
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"permissions"),
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{ .name = NULL, }
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};
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struct test_suite suite__openat_syscall_event = {
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.desc = "Detect openat syscall event",
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.test_cases = tests__openat_syscall_event,
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};
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