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68 lines
1.7 KiB
68 lines
1.7 KiB
// 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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int test__openat_syscall_event(struct test *test __maybe_unused, int subtest __maybe_unused) |
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{ |
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int err = -1, 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 -1; |
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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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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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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 = 0; |
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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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